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Difference From 0b5fd0b0d3a7dccf To 747a3d937a376bb5

2016-11-28
19:31
Update this project with sqlite version 3.15.2. (check-in: 75d3e72e40 user: dan tags: trunk)
2016-11-04
12:29
Upgrade this project to SQLite version 3.15.1. (check-in: 747a3d937a user: dan tags: trunk)
2016-10-19
18:28
Upgrade gradle plugin to 2.14. (check-in: a2f61e3931 user: dan tags: trunk)
2013-12-24
19:16
Add a test to check that SQLiteOpenHelper works with SEE. (check-in: 60c548bff9 user: dan tags: trunk)
18:51
Add extra SEE tests. And fix problems revealed by the same. (check-in: 0b5fd0b0d3 user: dan tags: trunk)
12:07
In SQLITE_HAS_CODEC builds, do not initialize the LOCALIZED collation automatically (as if the SQLiteDatabase.NO_LOCALIZED_COLLATORS flag was set). Require apps to call the enableLocalizedCollators() method to explicitly initialize it. This gives the app an opportunity to execute a PRAGMA statement to configure an encryption key before the database is first accessed. (check-in: 9c4a073c3b user: dan tags: trunk)

Deleted AndroidManifest.xml. 
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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="org.sqlite.app.customsqlite"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
        <activity android:name="CustomSqlite"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>
Added Customsqlite.iml. 




















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<?xml version="1.0" encoding="UTF-8"?>
<module external.linked.project.id="Customsqlite" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" external.system.module.group="" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
  <component name="FacetManager">
    <facet type="java-gradle" name="Java-Gradle">
      <configuration>
        <option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/build" />
        <option name="BUILDABLE" value="false" />
      </configuration>
    </facet>
  </component>
  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7" inherit-compiler-output="true">
    <exclude-output />
    <content url="file://$MODULE_DIR$">
      <excludeFolder url="file://$MODULE_DIR$/.gradle" />
    </content>
    <orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
  </component>
</module>






Deleted ant.properties.





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# This file is used to override default values used by the Ant build system.
#
# This file must be checked into Version Control Systems, as it is
# integral to the build system of your project.

# This file is only used by the Ant script.

# You can use this to override default values such as
#  'source.dir' for the location of your java source folder and
#  'out.dir' for the location of your output folder.

# You can also use it define how the release builds are signed by declaring
# the following properties:
#  'key.store' for the location of your keystore and
#  'key.alias' for the name of the key to use.
# The password will be asked during the build when you use the 'release' target.







Added build.gradle.





























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// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}






Deleted build.xml.





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<?xml version="1.0" encoding="UTF-8"?>
<project name="CustomSqlite" default="help">

    <!-- The local.properties file is created and updated by the 'android' tool.
         It contains the path to the SDK. It should *NOT* be checked into
         Version Control Systems. -->
    <property file="local.properties" />

    <!-- The ant.properties file can be created by you. It is only edited by the
         'android' tool to add properties to it.
         This is the place to change some Ant specific build properties.
         Here are some properties you may want to change/update:

         source.dir
             The name of the source directory. Default is 'src'.
         out.dir
             The name of the output directory. Default is 'bin'.

         For other overridable properties, look at the beginning of the rules
         files in the SDK, at tools/ant/build.xml

         Properties related to the SDK location or the project target should
         be updated using the 'android' tool with the 'update' action.

         This file is an integral part of the build system for your
         application and should be checked into Version Control Systems.

         -->
    <property file="ant.properties" />

    <!-- if sdk.dir was not set from one of the property file, then
         get it from the ANDROID_HOME env var.
         This must be done before we load project.properties since
         the proguard config can use sdk.dir -->
    <property environment="env" />
    <condition property="sdk.dir" value="${env.ANDROID_HOME}">
        <isset property="env.ANDROID_HOME" />
    </condition>

    <!-- The project.properties file is created and updated by the 'android'
         tool, as well as ADT.

         This contains project specific properties such as project target, and library
         dependencies. Lower level build properties are stored in ant.properties
         (or in .classpath for Eclipse projects).

         This file is an integral part of the build system for your
         application and should be checked into Version Control Systems. -->
    <loadproperties srcFile="project.properties" />

    <!-- quick check on sdk.dir -->
    <fail
            message="sdk.dir is missing. Make sure to generate local.properties using 'android update project' or to inject it through the ANDROID_HOME environment variable."
            unless="sdk.dir"
    />

    <!--
        Import per project custom build rules if present at the root of the project.
        This is the place to put custom intermediary targets such as:
            -pre-build
            -pre-compile
            -post-compile (This is typically used for code obfuscation.
                           Compiled code location: ${out.classes.absolute.dir}
                           If this is not done in place, override ${out.dex.input.absolute.dir})
            -post-package
            -post-build
            -pre-clean
    -->
    <import file="custom_rules.xml" optional="true" />

    <!-- Import the actual build file.

         To customize existing targets, there are two options:
         - Customize only one target:
             - copy/paste the target into this file, *before* the
               <import> task.
             - customize it to your needs.
         - Customize the whole content of build.xml
             - copy/paste the content of the rules files (minus the top node)
               into this file, replacing the <import> task.
             - customize to your needs.

         ***********************
         ****** IMPORTANT ******
         ***********************
         In all cases you must update the value of version-tag below to read 'custom' instead of an integer,
         in order to avoid having your file be overridden by tools such as "android update project"
    -->
    <!-- version-tag: 1 -->
    <import file="${sdk.dir}/tools/ant/build.xml" />

</project>






Added gradle.properties.


























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# Project-wide Gradle settings.

# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.

# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html

# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
# Default value: -Xmx10248m -XX:MaxPermSize=256m
# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true

android.useDeprecatedNdk true






Added gradle/wrapper/gradle-wrapper.jar.



cannot compute difference between binary files


Added gradle/wrapper/gradle-wrapper.properties.












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#Wed Oct 19 18:56:36 ICT 2016
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip






Added gradlew.






































































































































































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#!/usr/bin/env bash

##############################################################################
##
##  Gradle start up script for UN*X
##
##############################################################################

# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS=""

APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`

# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"

warn ( ) {
    echo "$*"
}

die ( ) {
    echo
    echo "$*"
    echo
    exit 1
}

# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
case "`uname`" in
  CYGWIN* )
    cygwin=true
    ;;
  Darwin* )
    darwin=true
    ;;
  MINGW* )
    msys=true
    ;;
esac

# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
    ls=`ls -ld "$PRG"`
    link=`expr "$ls" : '.*-> \(.*\)$'`
    if expr "$link" : '/.*' > /dev/null; then
        PRG="$link"
    else
        PRG=`dirname "$PRG"`"/$link"
    fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null

CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar

# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
        # IBM's JDK on AIX uses strange locations for the executables
        JAVACMD="$JAVA_HOME/jre/sh/java"
    else
        JAVACMD="$JAVA_HOME/bin/java"
    fi
    if [ ! -x "$JAVACMD" ] ; then
        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME

Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
    fi
else
    JAVACMD="java"
    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.

Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi

# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
    MAX_FD_LIMIT=`ulimit -H -n`
    if [ $? -eq 0 ] ; then
        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
            MAX_FD="$MAX_FD_LIMIT"
        fi
        ulimit -n $MAX_FD
        if [ $? -ne 0 ] ; then
            warn "Could not set maximum file descriptor limit: $MAX_FD"
        fi
    else
        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
    fi
fi

# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi

# For Cygwin, switch paths to Windows format before running java
if $cygwin ; then
    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
    JAVACMD=`cygpath --unix "$JAVACMD"`

    # We build the pattern for arguments to be converted via cygpath
    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
    SEP=""
    for dir in $ROOTDIRSRAW ; do
        ROOTDIRS="$ROOTDIRS$SEP$dir"
        SEP="|"
    done
    OURCYGPATTERN="(^($ROOTDIRS))"
    # Add a user-defined pattern to the cygpath arguments
    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
    fi
    # Now convert the arguments - kludge to limit ourselves to /bin/sh
    i=0
    for arg in "$@" ; do
        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option

        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
        else
            eval `echo args$i`="\"$arg\""
        fi
        i=$((i+1))
    done
    case $i in
        (0) set -- ;;
        (1) set -- "$args0" ;;
        (2) set -- "$args0" "$args1" ;;
        (3) set -- "$args0" "$args1" "$args2" ;;
        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
    esac
fi

# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
function splitJvmOpts() {
    JVM_OPTS=("$@")
}
eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"

exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"






Added gradlew.bat.
































































































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@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem  Gradle startup script for Windows
@rem
@rem ##########################################################################

@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal

@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS=

set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%

@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome

set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init

echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.

goto fail

:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe

if exist "%JAVA_EXE%" goto init

echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.

goto fail

:init
@rem Get command-line arguments, handling Windowz variants

if not "%OS%" == "Windows_NT" goto win9xME_args
if "%@eval[2+2]" == "4" goto 4NT_args

:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2

:win9xME_args_slurp
if "x%~1" == "x" goto execute

set CMD_LINE_ARGS=%*
goto execute

:4NT_args
@rem Get arguments from the 4NT Shell from JP Software
set CMD_LINE_ARGS=%$

:execute
@rem Setup the command line

set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar

@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%

:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd

:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1

:mainEnd
if "%OS%"=="Windows_NT" endlocal

:omega






Deleted jni/ALog-priv.h.





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/*
 * Copyright 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef NATIVEHELPER_ALOGPRIV_H_
#define NATIVEHELPER_ALOGPRIV_H_

#include <android/log.h>

#ifndef LOG_NDEBUG
#ifdef NDEBUG
#define LOG_NDEBUG 1
#else
#define LOG_NDEBUG 0
#endif
#endif


/*
 * Basic log message macros intended to emulate the behavior of log/log.h
 * in system core.  This should be dependent only on ndk exposed logging
 * functionality.
 */

#ifndef ALOG
#define ALOG(priority, tag, fmt...) \
    __android_log_print(ANDROID_##priority, tag, fmt)
#endif

#ifndef ALOGV
#if LOG_NDEBUG
#define ALOGV(...)   ((void)0)
#else
#define ALOGV(...) ((void)ALOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__))
#endif
#endif

#ifndef ALOGD
#define ALOGD(...) ((void)ALOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__))
#endif

#ifndef ALOGI
#define ALOGI(...) ((void)ALOG(LOG_INFO, LOG_TAG, __VA_ARGS__))
#endif

#ifndef ALOGW
#define ALOGW(...) ((void)ALOG(LOG_WARN, LOG_TAG, __VA_ARGS__))
#endif

#ifndef ALOGE
#define ALOGE(...) ((void)ALOG(LOG_ERROR, LOG_TAG, __VA_ARGS__))
#endif

/*
** Not quite the same as the core android LOG_FATAL_IF (which also
** sends a SIGTRAP), but close enough.
*/
#define LOG_FATAL_IF(bCond, zErr) if( bCond ) ALOGE(zErr);

#endif






Deleted jni/Android.mk.





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LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_CFLAGS += -DHAVE_CONFIG_H -DKHTML_NO_EXCEPTIONS -DGKWQ_NO_JAVA
LOCAL_CFLAGS += -DNO_SUPPORT_JS_BINDING -DQT_NO_WHEELEVENT -DKHTML_NO_XBL
LOCAL_CFLAGS += -U__APPLE__
LOCAL_CFLAGS += -Wno-unused-parameter -Wno-int-to-pointer-cast
LOCAL_CFLAGS += -Wno-maybe-uninitialized -Wno-parentheses
LOCAL_CPPFLAGS += -Wno-conversion-null


ifeq ($(TARGET_ARCH), arm)
	LOCAL_CFLAGS += -DPACKED="__attribute__ ((packed))"
else
	LOCAL_CFLAGS += -DPACKED=""
endif

LOCAL_SRC_FILES:=                             \
	android_database_SQLiteCommon.cpp     \
	android_database_SQLiteConnection.cpp \
	android_database_SQLiteGlobal.cpp     \
	android_database_SQLiteDebug.cpp      \
	JNIHelp.cpp JniConstants.cpp

#
# For a SEE build, add the SEE sources to the tree and uncomment the first
# two of the following three lines.
#
#    LOCAL_SRC_FILES += sqlite3-see.c
#    LOCAL_CFLAGS    += -DSQLITE_HAS_CODEC
LOCAL_SRC_FILES += sqlite3.c

LOCAL_C_INCLUDES += nativehelper/

LOCAL_MODULE:= libsqliteX
LOCAL_LDLIBS += -ldl -llog 

include $(BUILD_SHARED_LIBRARY)







Deleted jni/Application.mk.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "JNIHelp"

#include "JniConstants.h"
#include "JNIHelp.h"
#include "ALog-priv.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>

#include <string>

/**
 * Equivalent to ScopedLocalRef, but for C_JNIEnv instead. (And slightly more powerful.)
 */
template<typename T>
class scoped_local_ref {
public:
    scoped_local_ref(C_JNIEnv* env, T localRef = NULL)
    : mEnv(env), mLocalRef(localRef)
    {
    }

    ~scoped_local_ref() {
        reset();
    }

    void reset(T localRef = NULL) {
        if (mLocalRef != NULL) {
            (*mEnv)->DeleteLocalRef(reinterpret_cast<JNIEnv*>(mEnv), mLocalRef);
            mLocalRef = localRef;
        }
    }

    T get() const {
        return mLocalRef;
    }

private:
    C_JNIEnv* mEnv;
    T mLocalRef;

    // Disallow copy and assignment.
    scoped_local_ref(const scoped_local_ref&);
    void operator=(const scoped_local_ref&);
};

static jclass findClass(C_JNIEnv* env, const char* className) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    return (*env)->FindClass(e, className);
}

extern "C" int jniRegisterNativeMethods(C_JNIEnv* env, const char* className,
    const JNINativeMethod* gMethods, int numMethods)
{
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    ALOGV("Registering %s's %d native methods...", className, numMethods);

    scoped_local_ref<jclass> c(env, findClass(env, className));
    if (c.get() == NULL) {
        char* msg;
        asprintf(&msg, "Native registration unable to find class '%s'; aborting...", className);
        e->FatalError(msg);
    }

    if ((*env)->RegisterNatives(e, c.get(), gMethods, numMethods) < 0) {
        char* msg;
        asprintf(&msg, "RegisterNatives failed for '%s'; aborting...", className);
        e->FatalError(msg);
    }

    return 0;
}

/*
 * Returns a human-readable summary of an exception object.  The buffer will
 * be populated with the "binary" class name and, if present, the
 * exception message.
 */
static bool getExceptionSummary(C_JNIEnv* env, jthrowable exception, std::string& result) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    /* get the name of the exception's class */
    scoped_local_ref<jclass> exceptionClass(env, (*env)->GetObjectClass(e, exception)); // can't fail
    scoped_local_ref<jclass> classClass(env,
            (*env)->GetObjectClass(e, exceptionClass.get())); // java.lang.Class, can't fail
    jmethodID classGetNameMethod =
            (*env)->GetMethodID(e, classClass.get(), "getName", "()Ljava/lang/String;");
    scoped_local_ref<jstring> classNameStr(env,
            (jstring) (*env)->CallObjectMethod(e, exceptionClass.get(), classGetNameMethod));
    if (classNameStr.get() == NULL) {
        (*env)->ExceptionClear(e);
        result = "<error getting class name>";
        return false;
    }
    const char* classNameChars = (*env)->GetStringUTFChars(e, classNameStr.get(), NULL);
    if (classNameChars == NULL) {
        (*env)->ExceptionClear(e);
        result = "<error getting class name UTF-8>";
        return false;
    }
    result += classNameChars;
    (*env)->ReleaseStringUTFChars(e, classNameStr.get(), classNameChars);

    /* if the exception has a detail message, get that */
    jmethodID getMessage =
            (*env)->GetMethodID(e, exceptionClass.get(), "getMessage", "()Ljava/lang/String;");
    scoped_local_ref<jstring> messageStr(env,
            (jstring) (*env)->CallObjectMethod(e, exception, getMessage));
    if (messageStr.get() == NULL) {
        return true;
    }

    result += ": ";

    const char* messageChars = (*env)->GetStringUTFChars(e, messageStr.get(), NULL);
    if (messageChars != NULL) {
        result += messageChars;
        (*env)->ReleaseStringUTFChars(e, messageStr.get(), messageChars);
    } else {
        result += "<error getting message>";
        (*env)->ExceptionClear(e); // clear OOM
    }

    return true;
}

/*
 * Returns an exception (with stack trace) as a string.
 */
static bool getStackTrace(C_JNIEnv* env, jthrowable exception, std::string& result) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    scoped_local_ref<jclass> stringWriterClass(env, findClass(env, "java/io/StringWriter"));
    if (stringWriterClass.get() == NULL) {
        return false;
    }

    jmethodID stringWriterCtor = (*env)->GetMethodID(e, stringWriterClass.get(), "<init>", "()V");
    jmethodID stringWriterToStringMethod =
            (*env)->GetMethodID(e, stringWriterClass.get(), "toString", "()Ljava/lang/String;");

    scoped_local_ref<jclass> printWriterClass(env, findClass(env, "java/io/PrintWriter"));
    if (printWriterClass.get() == NULL) {
        return false;
    }

    jmethodID printWriterCtor =
            (*env)->GetMethodID(e, printWriterClass.get(), "<init>", "(Ljava/io/Writer;)V");

    scoped_local_ref<jobject> stringWriter(env,
            (*env)->NewObject(e, stringWriterClass.get(), stringWriterCtor));
    if (stringWriter.get() == NULL) {
        return false;
    }

    jobject printWriter =
            (*env)->NewObject(e, printWriterClass.get(), printWriterCtor, stringWriter.get());
    if (printWriter == NULL) {
        return false;
    }

    scoped_local_ref<jclass> exceptionClass(env, (*env)->GetObjectClass(e, exception)); // can't fail
    jmethodID printStackTraceMethod =
            (*env)->GetMethodID(e, exceptionClass.get(), "printStackTrace", "(Ljava/io/PrintWriter;)V");
    (*env)->CallVoidMethod(e, exception, printStackTraceMethod, printWriter);

    if ((*env)->ExceptionCheck(e)) {
        return false;
    }

    scoped_local_ref<jstring> messageStr(env,
            (jstring) (*env)->CallObjectMethod(e, stringWriter.get(), stringWriterToStringMethod));
    if (messageStr.get() == NULL) {
        return false;
    }

    const char* utfChars = (*env)->GetStringUTFChars(e, messageStr.get(), NULL);
    if (utfChars == NULL) {
        return false;
    }

    result = utfChars;

    (*env)->ReleaseStringUTFChars(e, messageStr.get(), utfChars);
    return true;
}

extern "C" int jniThrowException(C_JNIEnv* env, const char* className, const char* msg) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    if ((*env)->ExceptionCheck(e)) {
        /* TODO: consider creating the new exception with this as "cause" */
        scoped_local_ref<jthrowable> exception(env, (*env)->ExceptionOccurred(e));
        (*env)->ExceptionClear(e);

        if (exception.get() != NULL) {
            std::string text;
            getExceptionSummary(env, exception.get(), text);
            ALOGW("Discarding pending exception (%s) to throw %s", text.c_str(), className);
        }
    }

    scoped_local_ref<jclass> exceptionClass(env, findClass(env, className));
    if (exceptionClass.get() == NULL) {
        ALOGE("Unable to find exception class %s", className);
        /* ClassNotFoundException now pending */
        return -1;
    }

    if ((*env)->ThrowNew(e, exceptionClass.get(), msg) != JNI_OK) {
        ALOGE("Failed throwing '%s' '%s'", className, msg);
        /* an exception, most likely OOM, will now be pending */
        return -1;
    }

    return 0;
}

int jniThrowExceptionFmt(C_JNIEnv* env, const char* className, const char* fmt, va_list args) {
    char msgBuf[512];
    vsnprintf(msgBuf, sizeof(msgBuf), fmt, args);
    return jniThrowException(env, className, msgBuf);
}

int jniThrowNullPointerException(C_JNIEnv* env, const char* msg) {
    return jniThrowException(env, "java/lang/NullPointerException", msg);
}

int jniThrowRuntimeException(C_JNIEnv* env, const char* msg) {
    return jniThrowException(env, "java/lang/RuntimeException", msg);
}

int jniThrowIOException(C_JNIEnv* env, int errnum) {
    char buffer[80];
    const char* message = jniStrError(errnum, buffer, sizeof(buffer));
    return jniThrowException(env, "java/io/IOException", message);
}

static std::string jniGetStackTrace(C_JNIEnv* env, jthrowable exception) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    scoped_local_ref<jthrowable> currentException(env, (*env)->ExceptionOccurred(e));
    if (exception == NULL) {
        exception = currentException.get();
        if (exception == NULL) {
          return "<no pending exception>";
        }
    }

    if (currentException.get() != NULL) {
        (*env)->ExceptionClear(e);
    }

    std::string trace;
    if (!getStackTrace(env, exception, trace)) {
        (*env)->ExceptionClear(e);
        getExceptionSummary(env, exception, trace);
    }

    if (currentException.get() != NULL) {
        (*env)->Throw(e, currentException.get()); // rethrow
    }

    return trace;
}

void jniLogException(C_JNIEnv* env, int priority, const char* tag, jthrowable exception) {
    std::string trace(jniGetStackTrace(env, exception));
    __android_log_write(priority, tag, trace.c_str());
}

const char* jniStrError(int errnum, char* buf, size_t buflen) {
#if __GLIBC__
    // Note: glibc has a nonstandard strerror_r that returns char* rather than POSIX's int.
    // char *strerror_r(int errnum, char *buf, size_t n);
    return strerror_r(errnum, buf, buflen);
#else
    int rc = strerror_r(errnum, buf, buflen);
    if (rc != 0) {
        // (POSIX only guarantees a value other than 0. The safest
        // way to implement this function is to use C++ and overload on the
        // type of strerror_r to accurately distinguish GNU from POSIX.)
        snprintf(buf, buflen, "errno %d", errnum);
    }
    return buf;
#endif
}

jobject jniCreateFileDescriptor(C_JNIEnv* env, int fd) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    static jmethodID ctor = e->GetMethodID(JniConstants::fileDescriptorClass, "<init>", "()V");
    jobject fileDescriptor = (*env)->NewObject(e, JniConstants::fileDescriptorClass, ctor);
    // NOTE: NewObject ensures that an OutOfMemoryError will be seen by the Java
    // caller if the alloc fails, so we just return NULL when that happens.
    if (fileDescriptor != NULL)  {
        jniSetFileDescriptorOfFD(env, fileDescriptor, fd);
    }
    return fileDescriptor;
}

int jniGetFDFromFileDescriptor(C_JNIEnv* env, jobject fileDescriptor) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    static jfieldID fid = e->GetFieldID(JniConstants::fileDescriptorClass, "descriptor", "I");
    if (fileDescriptor != NULL) {
        return (*env)->GetIntField(e, fileDescriptor, fid);
    } else {
        return -1;
    }
}

void jniSetFileDescriptorOfFD(C_JNIEnv* env, jobject fileDescriptor, int value) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    static jfieldID fid = e->GetFieldID(JniConstants::fileDescriptorClass, "descriptor", "I");
    (*env)->SetIntField(e, fileDescriptor, fid, value);
}

jobject jniGetReferent(C_JNIEnv* env, jobject ref) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    static jmethodID get = e->GetMethodID(JniConstants::referenceClass, "get", "()Ljava/lang/Object;");
    return (*env)->CallObjectMethod(e, ref, get);
}







Deleted jni/JniConstants.cpp.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "JniConstants"

#include "ALog-priv.h"
#include "JniConstants.h"
#include "ScopedLocalRef.h"

#include <stdlib.h>

jclass JniConstants::bidiRunClass;
jclass JniConstants::bigDecimalClass;
jclass JniConstants::booleanClass;
jclass JniConstants::byteArrayClass;
jclass JniConstants::byteClass;
jclass JniConstants::calendarClass;
jclass JniConstants::characterClass;
jclass JniConstants::charsetICUClass;
jclass JniConstants::constructorClass;
jclass JniConstants::deflaterClass;
jclass JniConstants::doubleClass;
jclass JniConstants::errnoExceptionClass;
jclass JniConstants::fieldClass;
jclass JniConstants::fieldPositionIteratorClass;
jclass JniConstants::fileDescriptorClass;
jclass JniConstants::floatClass;
jclass JniConstants::gaiExceptionClass;
jclass JniConstants::inet6AddressClass;
jclass JniConstants::inetAddressClass;
jclass JniConstants::inetSocketAddressClass;
jclass JniConstants::inetUnixAddressClass;
jclass JniConstants::inflaterClass;
jclass JniConstants::inputStreamClass;
jclass JniConstants::integerClass;
jclass JniConstants::localeDataClass;
jclass JniConstants::longClass;
jclass JniConstants::methodClass;
jclass JniConstants::mutableIntClass;
jclass JniConstants::mutableLongClass;
jclass JniConstants::objectClass;
jclass JniConstants::objectArrayClass;
jclass JniConstants::outputStreamClass;
jclass JniConstants::parsePositionClass;
jclass JniConstants::patternSyntaxExceptionClass;
jclass JniConstants::realToStringClass;
jclass JniConstants::referenceClass;
jclass JniConstants::shortClass;
jclass JniConstants::socketClass;
jclass JniConstants::socketImplClass;
jclass JniConstants::stringClass;
jclass JniConstants::structAddrinfoClass;
jclass JniConstants::structFlockClass;
jclass JniConstants::structGroupReqClass;
jclass JniConstants::structLingerClass;
jclass JniConstants::structPasswdClass;
jclass JniConstants::structPollfdClass;
jclass JniConstants::structStatClass;
jclass JniConstants::structStatVfsClass;
jclass JniConstants::structTimevalClass;
jclass JniConstants::structUcredClass;
jclass JniConstants::structUtsnameClass;

static jclass findClass(JNIEnv* env, const char* name) {
    ScopedLocalRef<jclass> localClass(env, env->FindClass(name));
    jclass result = reinterpret_cast<jclass>(env->NewGlobalRef(localClass.get()));
    if (result == NULL) {
        ALOGE("failed to find class '%s'", name);
        abort();
    }
    return result;
}

void JniConstants::init(JNIEnv* env) {
    bidiRunClass = findClass(env, "java/text/Bidi$Run");
    bigDecimalClass = findClass(env, "java/math/BigDecimal");
    booleanClass = findClass(env, "java/lang/Boolean");
    byteClass = findClass(env, "java/lang/Byte");
    byteArrayClass = findClass(env, "[B");
    calendarClass = findClass(env, "java/util/Calendar");
    characterClass = findClass(env, "java/lang/Character");
    charsetICUClass = findClass(env, "java/nio/charset/CharsetICU");
    constructorClass = findClass(env, "java/lang/reflect/Constructor");
    floatClass = findClass(env, "java/lang/Float");
    deflaterClass = findClass(env, "java/util/zip/Deflater");
    doubleClass = findClass(env, "java/lang/Double");
    errnoExceptionClass = findClass(env, "libcore/io/ErrnoException");
    fieldClass = findClass(env, "java/lang/reflect/Field");
    fieldPositionIteratorClass = findClass(env, "libcore/icu/NativeDecimalFormat$FieldPositionIterator");
    fileDescriptorClass = findClass(env, "java/io/FileDescriptor");
    gaiExceptionClass = findClass(env, "libcore/io/GaiException");
    inet6AddressClass = findClass(env, "java/net/Inet6Address");
    inetAddressClass = findClass(env, "java/net/InetAddress");
    inetSocketAddressClass = findClass(env, "java/net/InetSocketAddress");
    inetUnixAddressClass = findClass(env, "java/net/InetUnixAddress");
    inflaterClass = findClass(env, "java/util/zip/Inflater");
    inputStreamClass = findClass(env, "java/io/InputStream");
    integerClass = findClass(env, "java/lang/Integer");
    localeDataClass = findClass(env, "libcore/icu/LocaleData");
    longClass = findClass(env, "java/lang/Long");
    methodClass = findClass(env, "java/lang/reflect/Method");
    mutableIntClass = findClass(env, "libcore/util/MutableInt");
    mutableLongClass = findClass(env, "libcore/util/MutableLong");
    objectClass = findClass(env, "java/lang/Object");
    objectArrayClass = findClass(env, "[Ljava/lang/Object;");
    outputStreamClass = findClass(env, "java/io/OutputStream");
    parsePositionClass = findClass(env, "java/text/ParsePosition");
    patternSyntaxExceptionClass = findClass(env, "java/util/regex/PatternSyntaxException");
    realToStringClass = findClass(env, "java/lang/RealToString");
    referenceClass = findClass(env, "java/lang/ref/Reference");
    shortClass = findClass(env, "java/lang/Short");
    socketClass = findClass(env, "java/net/Socket");
    socketImplClass = findClass(env, "java/net/SocketImpl");
    stringClass = findClass(env, "java/lang/String");
    structAddrinfoClass = findClass(env, "libcore/io/StructAddrinfo");
    structFlockClass = findClass(env, "libcore/io/StructFlock");
    structGroupReqClass = findClass(env, "libcore/io/StructGroupReq");
    structLingerClass = findClass(env, "libcore/io/StructLinger");
    structPasswdClass = findClass(env, "libcore/io/StructPasswd");
    structPollfdClass = findClass(env, "libcore/io/StructPollfd");
    structStatClass = findClass(env, "libcore/io/StructStat");
    structStatVfsClass = findClass(env, "libcore/io/StructStatVfs");
    structTimevalClass = findClass(env, "libcore/io/StructTimeval");
    structUcredClass = findClass(env, "libcore/io/StructUcred");
    structUtsnameClass = findClass(env, "libcore/io/StructUtsname");
}






Deleted jni/README.





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All the files in this directory are copied from stock android. The following
files:

JniConstants.cpp
JNIHelp.cpp
ALog-priv.h

are copied in from Android's libnativehelper module (altogether less than 1000
lines of code). The remainder are from the core framework (directory
/frameworks/base/core/jni).

Notes on changes:

The ashmem_XXX() interfaces are used for the various "xxxForBlobDescriptor()"
API functions. The code in libcutils for this seems to be platform
dependent - some platforms have kernel support, others have a user space
implementation. So these functions are not supported for now.

The original SQLiteConnection.cpp uses AndroidRuntime::genJNIEnv() to obtain a
pointer to the current threads environment. Changed to store a pointer to the
process JavaVM (Android allows only one) as a global variable. Then retrieve
the JNIEnv as needed using GetEnv().

Replaced uses of class String8 with std::string in SQLiteConnection.cpp and a
few other places.

The stock Android code to populate CursorWindow containers with the results of
a SELECT statement uses a C++ interface that is not available to NDK builds. So
this code is rewritten to call the CursorWindow java interface via JNI methods.
This is the largest source code change. See function 
nativeExecuteForCursorWindow() in file android_database_SQLiteConnection.cpp
for details.

The "LOCALIZED" collation and some miscellaneous user-functions added by the
sqlite3_android.cpp module are not included. A collation called LOCALIZED
that is equivalent to BINARY is added instead to keep various things working.
This should not cause serious problems - class SQLiteConnection always
runs "REINDEX LOCALIZED" immediately after opening a connection.







Deleted jni/android_database_SQLiteCommon.cpp.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "android_database_SQLiteCommon.h"

namespace android {

/* throw a SQLiteException with a message appropriate for the error in handle */
void throw_sqlite3_exception(JNIEnv* env, sqlite3* handle) {
    throw_sqlite3_exception(env, handle, NULL);
}

/* throw a SQLiteException with the given message */
void throw_sqlite3_exception(JNIEnv* env, const char* message) {
    throw_sqlite3_exception(env, NULL, message);
}

/* throw a SQLiteException with a message appropriate for the error in handle
   concatenated with the given message
 */
void throw_sqlite3_exception(JNIEnv* env, sqlite3* handle, const char* message) {
    if (handle) {
        // get the error code and message from the SQLite connection
        // the error message may contain more information than the error code
        // because it is based on the extended error code rather than the simplified
        // error code that SQLite normally returns.
        throw_sqlite3_exception(env, sqlite3_extended_errcode(handle),
                sqlite3_errmsg(handle), message);
    } else {
        // we use SQLITE_OK so that a generic SQLiteException is thrown;
        // any code not specified in the switch statement below would do.
        throw_sqlite3_exception(env, SQLITE_OK, "unknown error", message);
    }
}

/* throw a SQLiteException for a given error code
 * should only be used when the database connection is not available because the
 * error information will not be quite as rich */
void throw_sqlite3_exception_errcode(JNIEnv* env, int errcode, const char* message) {
    throw_sqlite3_exception(env, errcode, "unknown error", message);
}

/* throw a SQLiteException for a given error code, sqlite3message, and
   user message
 */
void throw_sqlite3_exception(JNIEnv* env, int errcode,
                             const char* sqlite3Message, const char* message) {
    const char* exceptionClass;
    switch (errcode & 0xff) { /* mask off extended error code */
        case SQLITE_IOERR:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDiskIOException";
            break;
        case SQLITE_CORRUPT:
        case SQLITE_NOTADB: // treat "unsupported file format" error as corruption also
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDatabaseCorruptException";
            break;
        case SQLITE_CONSTRAINT:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteConstraintException";
            break;
        case SQLITE_ABORT:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteAbortException";
            break;
        case SQLITE_DONE:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDoneException";
            sqlite3Message = NULL; // SQLite error message is irrelevant in this case
            break;
        case SQLITE_FULL:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteFullException";
            break;
        case SQLITE_MISUSE:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteMisuseException";
            break;
        case SQLITE_PERM:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteAccessPermException";
            break;
        case SQLITE_BUSY:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDatabaseLockedException";
            break;
        case SQLITE_LOCKED:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteTableLockedException";
            break;
        case SQLITE_READONLY:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteReadOnlyDatabaseException";
            break;
        case SQLITE_CANTOPEN:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteCantOpenDatabaseException";
            break;
        case SQLITE_TOOBIG:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteBlobTooBigException";
            break;
        case SQLITE_RANGE:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteBindOrColumnIndexOutOfRangeException";
            break;
        case SQLITE_NOMEM:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteOutOfMemoryException";
            break;
        case SQLITE_MISMATCH:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDatatypeMismatchException";
            break;
        case SQLITE_INTERRUPT:
            exceptionClass = "android/os/OperationCanceledException";
            break;
        default:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteException";
            break;
    }

    if (sqlite3Message) {
        char *zFullmsg = sqlite3_mprintf(
            "%s (code %d)%s%s", sqlite3Message, errcode, 
            (message ? ": " : ""), (message ? message : "")
        );
        jniThrowException(env, exceptionClass, zFullmsg);
        sqlite3_free(zFullmsg);
    } else {
        jniThrowException(env, exceptionClass, message);
    }
}


} // namespace android






Deleted jni/android_database_SQLiteCommon.h.





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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef _ANDROID_DATABASE_SQLITE_COMMON_H
#define _ANDROID_DATABASE_SQLITE_COMMON_H

#include <jni.h>
#include <JNIHelp.h>

#include <sqlite3.h>

// Special log tags defined in SQLiteDebug.java.
#define SQLITE_LOG_TAG "SQLiteLog"
#define SQLITE_TRACE_TAG "SQLiteStatements"
#define SQLITE_PROFILE_TAG "SQLiteTime"

namespace android {

/* throw a SQLiteException with a message appropriate for the error in handle */
void throw_sqlite3_exception(JNIEnv* env, sqlite3* handle);

/* throw a SQLiteException with the given message */
void throw_sqlite3_exception(JNIEnv* env, const char* message);

/* throw a SQLiteException with a message appropriate for the error in handle
   concatenated with the given message
 */
void throw_sqlite3_exception(JNIEnv* env, sqlite3* handle, const char* message);

/* throw a SQLiteException for a given error code */
void throw_sqlite3_exception_errcode(JNIEnv* env, int errcode, const char* message);

void throw_sqlite3_exception(JNIEnv* env, int errcode,
        const char* sqlite3Message, const char* message);

}

#endif // _ANDROID_DATABASE_SQLITE_COMMON_H






Deleted jni/android_database_SQLiteConnection.cpp.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "SQLiteConnection"

#include <jni.h>
#include <JNIHelp.h>
#include "ALog-priv.h"


#include <sys/mman.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>

#if 0
#include <androidfw/CursorWindow.h>
#endif

#include <sqlite3.h>
#if 0
#include <sqlite3_android.h>
#endif

#include "android_database_SQLiteCommon.h"

#include <string>

// Set to 1 to use UTF16 storage for localized indexes.
#define UTF16_STORAGE 0

namespace android {

/* Busy timeout in milliseconds.
 * If another connection (possibly in another process) has the database locked for
 * longer than this amount of time then SQLite will generate a SQLITE_BUSY error.
 * The SQLITE_BUSY error is then raised as a SQLiteDatabaseLockedException.
 *
 * In ordinary usage, busy timeouts are quite rare.  Most databases only ever
 * have a single open connection at a time unless they are using WAL.  When using
 * WAL, a timeout could occur if one connection is busy performing an auto-checkpoint
 * operation.  The busy timeout needs to be long enough to tolerate slow I/O write
 * operations but not so long as to cause the application to hang indefinitely if
 * there is a problem acquiring a database lock.
 */
static const int BUSY_TIMEOUT_MS = 2500;

static JavaVM *gpJavaVM = 0;

static struct {
    jfieldID name;
    jfieldID numArgs;
    jmethodID dispatchCallback;
} gSQLiteCustomFunctionClassInfo;

static struct {
    jclass clazz;
} gStringClassInfo;

struct SQLiteConnection {
    // Open flags.
    // Must be kept in sync with the constants defined in SQLiteDatabase.java.
    enum {
        OPEN_READWRITE          = 0x00000000,
        OPEN_READONLY           = 0x00000001,
        OPEN_READ_MASK          = 0x00000001,
        NO_LOCALIZED_COLLATORS  = 0x00000010,
        CREATE_IF_NECESSARY     = 0x10000000,
    };

    sqlite3* const db;
    const int openFlags;
    std::string path;
    std::string label;

    volatile bool canceled;

    SQLiteConnection(sqlite3* db, int openFlags, const std::string& path, const std::string& label) :
        db(db), openFlags(openFlags), path(path), label(label), canceled(false) { }
};

// Called each time a statement begins execution, when tracing is enabled.
static void sqliteTraceCallback(void *data, const char *sql) {
    SQLiteConnection* connection = static_cast<SQLiteConnection*>(data);
    ALOG(LOG_VERBOSE, SQLITE_TRACE_TAG, "%s: \"%s\"\n",
            connection->label.c_str(), sql);
}

// Called each time a statement finishes execution, when profiling is enabled.
static void sqliteProfileCallback(void *data, const char *sql, sqlite3_uint64 tm) {
    SQLiteConnection* connection = static_cast<SQLiteConnection*>(data);
    ALOG(LOG_VERBOSE, SQLITE_PROFILE_TAG, "%s: \"%s\" took %0.3f ms\n",
            connection->label.c_str(), sql, tm * 0.000001f);
}

// Called after each SQLite VM instruction when cancelation is enabled.
static int sqliteProgressHandlerCallback(void* data) {
    SQLiteConnection* connection = static_cast<SQLiteConnection*>(data);
    return connection->canceled;
}

/*
** This function is a collation sequence callback equivalent to the built-in
** BINARY sequence. 
**
** Stock Android uses a modified version of sqlite3.c that calls out to a module
** named "sqlite3_android" to add extra built-in collations and functions to
** all database handles. Specifically, collation sequence "LOCALIZED". For now,
** this module does not include sqlite3_android (since it is difficult to build
** with the NDK only). Instead, this function is registered as "LOCALIZED" for all
** new database handles. 
*/
static int coll_localized(
  void *not_used,
  int nKey1, const void *pKey1,
  int nKey2, const void *pKey2
){
  int rc, n;
  n = nKey1<nKey2 ? nKey1 : nKey2;
  rc = memcmp(pKey1, pKey2, n);
  if( rc==0 ){
    rc = nKey1 - nKey2;
  }
  return rc;
}

static jint nativeOpen(JNIEnv* env, jclass clazz, jstring pathStr, jint openFlags,
        jstring labelStr, jboolean enableTrace, jboolean enableProfile) {
    int sqliteFlags;
    if (openFlags & SQLiteConnection::CREATE_IF_NECESSARY) {
        sqliteFlags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
    } else if (openFlags & SQLiteConnection::OPEN_READONLY) {
        sqliteFlags = SQLITE_OPEN_READONLY;
    } else {
        sqliteFlags = SQLITE_OPEN_READWRITE;
    }

    const char* pathChars = env->GetStringUTFChars(pathStr, NULL);
    std::string path(pathChars);
    env->ReleaseStringUTFChars(pathStr, pathChars);

    const char* labelChars = env->GetStringUTFChars(labelStr, NULL);
    std::string label(labelChars);
    env->ReleaseStringUTFChars(labelStr, labelChars);

    sqlite3* db;
    int err = sqlite3_open_v2(path.c_str(), &db, sqliteFlags, NULL);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception_errcode(env, err, "Could not open database");
        return 0;
    }
    err = sqlite3_create_collation(db, "localized", SQLITE_UTF8, 0, coll_localized);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception_errcode(env, err, "Could not register collation");
        sqlite3_close(db);
        return 0;
    }

    // Check that the database is really read/write when that is what we asked for.
    if ((sqliteFlags & SQLITE_OPEN_READWRITE) && sqlite3_db_readonly(db, NULL)) {
        throw_sqlite3_exception(env, db, "Could not open the database in read/write mode.");
        sqlite3_close(db);
        return 0;
    }

    // Set the default busy handler to retry automatically before returning SQLITE_BUSY.
    err = sqlite3_busy_timeout(db, BUSY_TIMEOUT_MS);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, db, "Could not set busy timeout");
        sqlite3_close(db);
        return 0;
    }

    // Register custom Android functions.
#if 0
    err = register_android_functions(db, UTF16_STORAGE);
    if (err) {
        throw_sqlite3_exception(env, db, "Could not register Android SQL functions.");
        sqlite3_close(db);
        return 0;
    }
#endif

    // Create wrapper object.
    SQLiteConnection* connection = new SQLiteConnection(db, openFlags, path, label);

    // Enable tracing and profiling if requested.
    if (enableTrace) {
        sqlite3_trace(db, &sqliteTraceCallback, connection);
    }
    if (enableProfile) {
        sqlite3_profile(db, &sqliteProfileCallback, connection);
    }

    ALOGV("Opened connection %p with label '%s'", db, label.c_str());
    return reinterpret_cast<jint>(connection);
}

static void nativeClose(JNIEnv* env, jclass clazz, jint connectionPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    if (connection) {
        ALOGV("Closing connection %p", connection->db);
        int err = sqlite3_close(connection->db);
        if (err != SQLITE_OK) {
            // This can happen if sub-objects aren't closed first.  Make sure the caller knows.
            ALOGE("sqlite3_close(%p) failed: %d", connection->db, err);
            throw_sqlite3_exception(env, connection->db, "Count not close db.");
            return;
        }

        delete connection;
    }
}

// Called each time a custom function is evaluated.
static void sqliteCustomFunctionCallback(sqlite3_context *context,
        int argc, sqlite3_value **argv) {

    JNIEnv* env = 0;
    gpJavaVM->GetEnv((void**)&env, JNI_VERSION_1_4);

    // Get the callback function object.
    // Create a new local reference to it in case the callback tries to do something
    // dumb like unregister the function (thereby destroying the global ref) while it is running.
    jobject functionObjGlobal = reinterpret_cast<jobject>(sqlite3_user_data(context));
    jobject functionObj = env->NewLocalRef(functionObjGlobal);

    jobjectArray argsArray = env->NewObjectArray(argc, gStringClassInfo.clazz, NULL);
    if (argsArray) {
        for (int i = 0; i < argc; i++) {
            const jchar* arg = static_cast<const jchar*>(sqlite3_value_text16(argv[i]));
            if (!arg) {
                ALOGW("NULL argument in custom_function_callback.  This should not happen.");
            } else {
                size_t argLen = sqlite3_value_bytes16(argv[i]) / sizeof(jchar);
                jstring argStr = env->NewString(arg, argLen);
                if (!argStr) {
                    goto error; // out of memory error
                }
                env->SetObjectArrayElement(argsArray, i, argStr);
                env->DeleteLocalRef(argStr);
            }
        }

        // TODO: Support functions that return values.
        env->CallVoidMethod(functionObj,
                gSQLiteCustomFunctionClassInfo.dispatchCallback, argsArray);

error:
        env->DeleteLocalRef(argsArray);
    }

    env->DeleteLocalRef(functionObj);

    if (env->ExceptionCheck()) {
        ALOGE("An exception was thrown by custom SQLite function.");
        /* LOGE_EX(env); */
        env->ExceptionClear();
    }
}

// Called when a custom function is destroyed.
static void sqliteCustomFunctionDestructor(void* data) {
    jobject functionObjGlobal = reinterpret_cast<jobject>(data);
    JNIEnv* env = 0;
    gpJavaVM->GetEnv((void**)&env, JNI_VERSION_1_4);
    env->DeleteGlobalRef(functionObjGlobal);
}

static void nativeRegisterCustomFunction(JNIEnv* env, jclass clazz, jint connectionPtr,
        jobject functionObj) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    jstring nameStr = jstring(env->GetObjectField(
            functionObj, gSQLiteCustomFunctionClassInfo.name));
    jint numArgs = env->GetIntField(functionObj, gSQLiteCustomFunctionClassInfo.numArgs);

    jobject functionObjGlobal = env->NewGlobalRef(functionObj);

    const char* name = env->GetStringUTFChars(nameStr, NULL);
    int err = sqlite3_create_function_v2(connection->db, name, numArgs, SQLITE_UTF16,
            reinterpret_cast<void*>(functionObjGlobal),
            &sqliteCustomFunctionCallback, NULL, NULL, &sqliteCustomFunctionDestructor);
    env->ReleaseStringUTFChars(nameStr, name);

    if (err != SQLITE_OK) {
        ALOGE("sqlite3_create_function returned %d", err);
        env->DeleteGlobalRef(functionObjGlobal);
        throw_sqlite3_exception(env, connection->db);
        return;
    }
}

static void nativeRegisterLocalizedCollators(JNIEnv* env, jclass clazz, jint connectionPtr,
        jstring localeStr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    const char* locale = env->GetStringUTFChars(localeStr, NULL);
#if 0
    int err = register_localized_collators(connection->db, locale, UTF16_STORAGE);
    env->ReleaseStringUTFChars(localeStr, locale);

    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db);
    }
#endif
}

static jint nativePrepareStatement(JNIEnv* env, jclass clazz, jint connectionPtr,
        jstring sqlString) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    jsize sqlLength = env->GetStringLength(sqlString);
    const jchar* sql = env->GetStringCritical(sqlString, NULL);
    sqlite3_stmt* statement;
    int err = sqlite3_prepare16_v2(connection->db,
            sql, sqlLength * sizeof(jchar), &statement, NULL);
    env->ReleaseStringCritical(sqlString, sql);

    if (err != SQLITE_OK) {
        // Error messages like 'near ")": syntax error' are not
        // always helpful enough, so construct an error string that
        // includes the query itself.
        const char *query = env->GetStringUTFChars(sqlString, NULL);
        char *message = (char*) malloc(strlen(query) + 50);
        if (message) {
            strcpy(message, ", while compiling: "); // less than 50 chars
            strcat(message, query);
        }
        env->ReleaseStringUTFChars(sqlString, query);
        throw_sqlite3_exception(env, connection->db, message);
        free(message);
        return 0;
    }

    ALOGV("Prepared statement %p on connection %p", statement, connection->db);
    return reinterpret_cast<jint>(statement);
}

static void nativeFinalizeStatement(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    // We ignore the result of sqlite3_finalize because it is really telling us about
    // whether any errors occurred while executing the statement.  The statement itself
    // is always finalized regardless.
    ALOGV("Finalized statement %p on connection %p", statement, connection->db);
    sqlite3_finalize(statement);
}

static jint nativeGetParameterCount(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    return sqlite3_bind_parameter_count(statement);
}

static jboolean nativeIsReadOnly(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    return sqlite3_stmt_readonly(statement) != 0;
}

static jint nativeGetColumnCount(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    return sqlite3_column_count(statement);
}

static jstring nativeGetColumnName(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr, jint index) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    const jchar* name = static_cast<const jchar*>(sqlite3_column_name16(statement, index));
    if (name) {
        size_t length = 0;
        while (name[length]) {
            length += 1;
        }
        return env->NewString(name, length);
    }
    return NULL;
}

static void nativeBindNull(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr, jint index) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = sqlite3_bind_null(statement, index);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeBindLong(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr, jint index, jlong value) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = sqlite3_bind_int64(statement, index, value);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeBindDouble(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr, jint index, jdouble value) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = sqlite3_bind_double(statement, index, value);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeBindString(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr, jint index, jstring valueString) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    jsize valueLength = env->GetStringLength(valueString);
    const jchar* value = env->GetStringCritical(valueString, NULL);
    int err = sqlite3_bind_text16(statement, index, value, valueLength * sizeof(jchar),
            SQLITE_TRANSIENT);
    env->ReleaseStringCritical(valueString, value);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeBindBlob(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr, jint index, jbyteArray valueArray) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    jsize valueLength = env->GetArrayLength(valueArray);
    jbyte* value = static_cast<jbyte*>(env->GetPrimitiveArrayCritical(valueArray, NULL));
    int err = sqlite3_bind_blob(statement, index, value, valueLength, SQLITE_TRANSIENT);
    env->ReleasePrimitiveArrayCritical(valueArray, value, JNI_ABORT);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeResetStatementAndClearBindings(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = sqlite3_reset(statement);
    if (err == SQLITE_OK) {
        err = sqlite3_clear_bindings(statement);
    }
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static int executeNonQuery(JNIEnv* env, SQLiteConnection* connection, sqlite3_stmt* statement) {
    int err = sqlite3_step(statement);
    if (err == SQLITE_ROW) {
        throw_sqlite3_exception(env,
                "Queries can be performed using SQLiteDatabase query or rawQuery methods only.");
    } else if (err != SQLITE_DONE) {
        throw_sqlite3_exception(env, connection->db);
    }
    return err;
}

static void nativeExecute(JNIEnv* env, jclass clazz, jint connectionPtr,
        jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    executeNonQuery(env, connection, statement);
}

static jint nativeExecuteForChangedRowCount(JNIEnv* env, jclass clazz,
        jint connectionPtr, jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeNonQuery(env, connection, statement);
    return err == SQLITE_DONE ? sqlite3_changes(connection->db) : -1;
}

static jlong nativeExecuteForLastInsertedRowId(JNIEnv* env, jclass clazz,
        jint connectionPtr, jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeNonQuery(env, connection, statement);
    return err == SQLITE_DONE && sqlite3_changes(connection->db) > 0
            ? sqlite3_last_insert_rowid(connection->db) : -1;
}

static int executeOneRowQuery(JNIEnv* env, SQLiteConnection* connection, sqlite3_stmt* statement) {
    int err = sqlite3_step(statement);
    if (err != SQLITE_ROW) {
        throw_sqlite3_exception(env, connection->db);
    }
    return err;
}

static jlong nativeExecuteForLong(JNIEnv* env, jclass clazz,
        jint connectionPtr, jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeOneRowQuery(env, connection, statement);
    if (err == SQLITE_ROW && sqlite3_column_count(statement) >= 1) {
        return sqlite3_column_int64(statement, 0);
    }
    return -1;
}

static jstring nativeExecuteForString(JNIEnv* env, jclass clazz,
        jint connectionPtr, jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeOneRowQuery(env, connection, statement);
    if (err == SQLITE_ROW && sqlite3_column_count(statement) >= 1) {
        const jchar* text = static_cast<const jchar*>(sqlite3_column_text16(statement, 0));
        if (text) {
            size_t length = sqlite3_column_bytes16(statement, 0) / sizeof(jchar);
            return env->NewString(text, length);
        }
    }
    return NULL;
}

static int createAshmemRegionWithData(JNIEnv* env, const void* data, size_t length) {
#if 0
    int error = 0;
    int fd = ashmem_create_region(NULL, length);
    if (fd < 0) {
        error = errno;
        ALOGE("ashmem_create_region failed: %s", strerror(error));
    } else {
        if (length > 0) {
            void* ptr = mmap(NULL, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
            if (ptr == MAP_FAILED) {
                error = errno;
                ALOGE("mmap failed: %s", strerror(error));
            } else {
                memcpy(ptr, data, length);
                munmap(ptr, length);
            }
        }

        if (!error) {
            if (ashmem_set_prot_region(fd, PROT_READ) < 0) {
                error = errno;
                ALOGE("ashmem_set_prot_region failed: %s", strerror(errno));
            } else {
                return fd;
            }
        }

        close(fd);
    }

#endif
    jniThrowIOException(env, -1);
    return -1;
}

static jint nativeExecuteForBlobFileDescriptor(JNIEnv* env, jclass clazz,
        jint connectionPtr, jint statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeOneRowQuery(env, connection, statement);
    if (err == SQLITE_ROW && sqlite3_column_count(statement) >= 1) {
        const void* blob = sqlite3_column_blob(statement, 0);
        if (blob) {
            int length = sqlite3_column_bytes(statement, 0);
            if (length >= 0) {
                return createAshmemRegionWithData(env, blob, length);
            }
        }
    }
    return -1;
}

/*
** Note: The following symbols must be in the same order as the corresponding
** elements in the aMethod[] array in function nativeExecuteForCursorWindow().
*/
enum CWMethodNames {
  CW_CLEAR         = 0,
  CW_SETNUMCOLUMNS = 1,
  CW_ALLOCROW      = 2,
  CW_FREELASTROW   = 3,
  CW_PUTNULL       = 4,
  CW_PUTLONG       = 5,
  CW_PUTDOUBLE     = 6,
  CW_PUTSTRING     = 7,
  CW_PUTBLOB       = 8
};

/*
** An instance of this structure represents a single CursorWindow java method.
*/
struct CWMethod {
  jmethodID id;                   /* Method id */
  const char *zName;              /* Method name */
  const char *zSig;               /* Method JNI signature */
};

/*
** Append the contents of the row that SQL statement pStmt currently points to
** to the CursorWindow object passed as the second argument. The CursorWindow
** currently contains iRow rows. Return true on success or false if an error
** occurs.
*/
static jboolean copyRowToWindow(
  JNIEnv *pEnv,
  jobject win,
  int iRow,
  sqlite3_stmt *pStmt,
  CWMethod *aMethod
){
  int nCol = sqlite3_column_count(pStmt);
  int i;
  jboolean bOk;

  bOk = pEnv->CallBooleanMethod(win, aMethod[CW_ALLOCROW].id);
  for(i=0; bOk && i<nCol; i++){
    switch( sqlite3_column_type(pStmt, i) ){
      case SQLITE_NULL: {
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTNULL].id, iRow, i);
        break;
      }

      case SQLITE_INTEGER: {
        jlong val = sqlite3_column_int64(pStmt, i);
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTLONG].id, val, iRow, i);
        break;
      }

      case SQLITE_FLOAT: {
        jdouble val = sqlite3_column_double(pStmt, i);
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTDOUBLE].id, val, iRow, i);
        break;
      }

      case SQLITE_TEXT: {
        const char *zVal = (const char*)sqlite3_column_text(pStmt, i);
        jstring val = pEnv->NewStringUTF(zVal);
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTSTRING].id, val, iRow, i);
        break;
      }

      default: {
        assert( sqlite3_column_type(pStmt, i)==SQLITE_BLOB );

        const jbyte *p = (const jbyte*)sqlite3_column_blob(pStmt, i);
        int n = sqlite3_column_bytes(pStmt, i);

        jbyteArray val = pEnv->NewByteArray(n);
        pEnv->SetByteArrayRegion(val, 0, n, p);
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTBLOB].id, val, iRow, i);
        break;
      }
    }

    if( bOk==0 ){
      pEnv->CallVoidMethod(win, aMethod[CW_FREELASTROW].id);
    }
  }

  return bOk;
}

static jboolean setWindowNumColumns(
  JNIEnv *pEnv,
  jobject win,
  sqlite3_stmt *pStmt,
  CWMethod *aMethod
){
  int nCol;

  pEnv->CallVoidMethod(win, aMethod[CW_CLEAR].id);
  nCol = sqlite3_column_count(pStmt);
  return pEnv->CallBooleanMethod(win, aMethod[CW_SETNUMCOLUMNS].id, (jint)nCol);
}

/*
** This method has been rewritten for org.sqlite.database.*. The original 
** android implementation used the C++ interface to populate a CursorWindow
** object. Since the NDK does not export this interface, we invoke the Java
** interface using standard JNI methods to do the same thing.
**
** This function executes the SQLite statement object passed as the 4th 
** argument and copies one or more returned rows into the CursorWindow
** object passed as the 5th argument. The set of rows copied into the 
** CursorWindow is always contiguous.
**
** The only row that *must* be copied into the CursorWindow is row 
** iRowRequired. Ideally, all rows from iRowStart through to the end
** of the query are copied into the CursorWindow. If this is not possible
** (CursorWindow objects have a finite capacity), some compromise position
** is found (see comments embedded in the code below for details).
**
** The return value is a 64-bit integer calculated as follows:
**
**      (iStart << 32) | nRow
**
** where iStart is the index of the first row copied into the CursorWindow.
** If the countAllRows argument is true, nRow is the total number of rows
** returned by the query. Otherwise, nRow is one greater than the index of 
** the last row copied into the CursorWindow.
*/
static jlong nativeExecuteForCursorWindow(
  JNIEnv *pEnv, 
  jclass clazz,
  jint connectionPtr,             /* Pointer to SQLiteConnection C++ object */
  jint statementPtr,              /* Pointer to sqlite3_stmt object */
  jobject win,                    /* The CursorWindow object to populate */
  jint startPos,                  /* First row to add (advisory) */
  jint iRowRequired,              /* Required row */
  jboolean countAllRows
) {
  SQLiteConnection *pConnection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
  sqlite3_stmt *pStmt = reinterpret_cast<sqlite3_stmt*>(statementPtr);

  CWMethod aMethod[] = {
    {0, "clear",         "()V"},
    {0, "setNumColumns", "(I)Z"},
    {0, "allocRow",      "()Z"},
    {0, "freeLastRow",   "()V"},
    {0, "putNull",       "(II)Z"},
    {0, "putLong",       "(JII)Z"},
    {0, "putDouble",     "(DII)Z"},
    {0, "putString",     "(Ljava/lang/String;II)Z"},
    {0, "putBlob",       "([BII)Z"},
  };
  jclass cls;                     /* Class android.database.CursorWindow */
  int i;                          /* Iterator variable */
  int nCol;                       /* Number of columns returned by pStmt */
  int nRow;
  jboolean bOk;
  int iStart;                     /* First row copied to CursorWindow */

  /* Locate all required CursorWindow methods. */
  cls = pEnv->FindClass("android/database/CursorWindow");
  for(i=0; i<(sizeof(aMethod)/sizeof(struct CWMethod)); i++){
    aMethod[i].id = pEnv->GetMethodID(cls, aMethod[i].zName, aMethod[i].zSig);
    if( aMethod[i].id==NULL ){
      jniThrowExceptionFmt(pEnv, "java/lang/Exception", 
          "Failed to find method CursorWindow.%s()", aMethod[i].zName
      );
      return 0;
    }
  }


  /* Set the number of columns in the window */
  bOk = setWindowNumColumns(pEnv, win, pStmt, aMethod);
  if( bOk==0 ) return 0;

  nRow = 0;
  iStart = startPos;
  while( sqlite3_step(pStmt)==SQLITE_ROW ){
    /* Only copy in rows that occur at or after row index iStart. */
    if( nRow>=iStart && bOk ){
      bOk = copyRowToWindow(pEnv, win, (nRow - iStart), pStmt, aMethod);
      if( bOk==0 ){
        /* The CursorWindow object ran out of memory. If row iRowRequired was
        ** not successfully added before this happened, clear the CursorWindow
        ** and try to add the current row again.  */
        if( nRow<=iRowRequired ){
          bOk = setWindowNumColumns(pEnv, win, pStmt, aMethod);
          if( bOk==0 ){
            sqlite3_reset(pStmt);
            return 0;
          }
          iStart = nRow;
          bOk = copyRowToWindow(pEnv, win, (nRow - iStart), pStmt, aMethod);
        }

        /* If the CursorWindow is still full and the countAllRows flag is not
        ** set, break out of the loop here. If countAllRows is set, continue
        ** so as to set variable nRow correctly.  */
        if( bOk==0 && countAllRows==0 ) break;
      }
    }

    nRow++;
  }

  /* Finalize the statement. If this indicates an error occurred, throw an
  ** SQLiteException exception.  */
  int rc = sqlite3_reset(pStmt);
  if( rc!=SQLITE_OK ){
    throw_sqlite3_exception(pEnv, sqlite3_db_handle(pStmt));
    return 0;
  }

  jlong lRet = jlong(iStart) << 32 | jlong(nRow);
  return lRet;
}

static jint nativeGetDbLookaside(JNIEnv* env, jobject clazz, jint connectionPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    int cur = -1;
    int unused;
    sqlite3_db_status(connection->db, SQLITE_DBSTATUS_LOOKASIDE_USED, &cur, &unused, 0);
    return cur;
}

static void nativeCancel(JNIEnv* env, jobject clazz, jint connectionPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    connection->canceled = true;
}

static void nativeResetCancel(JNIEnv* env, jobject clazz, jint connectionPtr,
        jboolean cancelable) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    connection->canceled = false;

    if (cancelable) {
        sqlite3_progress_handler(connection->db, 4, sqliteProgressHandlerCallback,
                connection);
    } else {
        sqlite3_progress_handler(connection->db, 0, NULL, NULL);
    }
}

static jboolean nativeHasCodec(JNIEnv* env, jobject clazz){
#ifdef SQLITE_HAS_CODEC
  return true;
#else
  return false;
#endif
}


static JNINativeMethod sMethods[] =
{
    /* name, signature, funcPtr */
    { "nativeOpen", "(Ljava/lang/String;ILjava/lang/String;ZZ)I",
            (void*)nativeOpen },
    { "nativeClose", "(I)V",
            (void*)nativeClose },
    { "nativeRegisterCustomFunction", "(ILorg/sqlite/database/sqlite/SQLiteCustomFunction;)V",
            (void*)nativeRegisterCustomFunction },
    { "nativeRegisterLocalizedCollators", "(ILjava/lang/String;)V",
            (void*)nativeRegisterLocalizedCollators },
    { "nativePrepareStatement", "(ILjava/lang/String;)I",
            (void*)nativePrepareStatement },
    { "nativeFinalizeStatement", "(II)V",
            (void*)nativeFinalizeStatement },
    { "nativeGetParameterCount", "(II)I",
            (void*)nativeGetParameterCount },
    { "nativeIsReadOnly", "(II)Z",
            (void*)nativeIsReadOnly },
    { "nativeGetColumnCount", "(II)I",
            (void*)nativeGetColumnCount },
    { "nativeGetColumnName", "(III)Ljava/lang/String;",
            (void*)nativeGetColumnName },
    { "nativeBindNull", "(III)V",
            (void*)nativeBindNull },
    { "nativeBindLong", "(IIIJ)V",
            (void*)nativeBindLong },
    { "nativeBindDouble", "(IIID)V",
            (void*)nativeBindDouble },
    { "nativeBindString", "(IIILjava/lang/String;)V",
            (void*)nativeBindString },
    { "nativeBindBlob", "(III[B)V",
            (void*)nativeBindBlob },
    { "nativeResetStatementAndClearBindings", "(II)V",
            (void*)nativeResetStatementAndClearBindings },
    { "nativeExecute", "(II)V",
            (void*)nativeExecute },
    { "nativeExecuteForLong", "(II)J",
            (void*)nativeExecuteForLong },
    { "nativeExecuteForString", "(II)Ljava/lang/String;",
            (void*)nativeExecuteForString },
    { "nativeExecuteForBlobFileDescriptor", "(II)I",
            (void*)nativeExecuteForBlobFileDescriptor },
    { "nativeExecuteForChangedRowCount", "(II)I",
            (void*)nativeExecuteForChangedRowCount },
    { "nativeExecuteForLastInsertedRowId", "(II)J",
            (void*)nativeExecuteForLastInsertedRowId },
    { "nativeExecuteForCursorWindow", "(IILandroid/database/CursorWindow;IIZ)J",
            (void*)nativeExecuteForCursorWindow },
    { "nativeGetDbLookaside", "(I)I",
            (void*)nativeGetDbLookaside },
    { "nativeCancel", "(I)V",
            (void*)nativeCancel },
    { "nativeResetCancel", "(IZ)V",
            (void*)nativeResetCancel },

    { "nativeHasCodec", "()Z", (void*)nativeHasCodec },
};

#define FIND_CLASS(var, className) \
        var = env->FindClass(className); \
        LOG_FATAL_IF(! var, "Unable to find class " className);

#define GET_METHOD_ID(var, clazz, methodName, fieldDescriptor) \
        var = env->GetMethodID(clazz, methodName, fieldDescriptor); \
        LOG_FATAL_IF(! var, "Unable to find method" methodName);

#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
        LOG_FATAL_IF(! var, "Unable to find field " fieldName);

int register_android_database_SQLiteConnection(JNIEnv *env)
{
    jclass clazz;
    FIND_CLASS(clazz, "org/sqlite/database/sqlite/SQLiteCustomFunction");

    GET_FIELD_ID(gSQLiteCustomFunctionClassInfo.name, clazz,
            "name", "Ljava/lang/String;");
    GET_FIELD_ID(gSQLiteCustomFunctionClassInfo.numArgs, clazz,
            "numArgs", "I");
    GET_METHOD_ID(gSQLiteCustomFunctionClassInfo.dispatchCallback,
            clazz, "dispatchCallback", "([Ljava/lang/String;)V");

    FIND_CLASS(clazz, "java/lang/String");
    gStringClassInfo.clazz = jclass(env->NewGlobalRef(clazz));

    return jniRegisterNativeMethods(env, 
        "org/sqlite/database/sqlite/SQLiteConnection",
        sMethods, NELEM(sMethods)
    );
}

extern int register_android_database_SQLiteGlobal(JNIEnv *env);
extern int register_android_database_SQLiteDebug(JNIEnv *env);

} // namespace android

extern "C" JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved) {
  JNIEnv *env = 0;

  android::gpJavaVM = vm;
  vm->GetEnv((void**)&env, JNI_VERSION_1_4);

  android::register_android_database_SQLiteConnection(env);
  android::register_android_database_SQLiteDebug(env);
  android::register_android_database_SQLiteGlobal(env);

  return JNI_VERSION_1_4;
}









Deleted jni/android_database_SQLiteDebug.cpp.





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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "SQLiteDebug"

#include <jni.h>
#include <JNIHelp.h>
#include <ALog-priv.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <sqlite3.h>

namespace android {

static struct {
    jfieldID memoryUsed;
    jfieldID pageCacheOverflow;
    jfieldID largestMemAlloc;
} gSQLiteDebugPagerStatsClassInfo;

static void nativeGetPagerStats(JNIEnv *env, jobject clazz, jobject statsObj)
{
    int memoryUsed;
    int pageCacheOverflow;
    int largestMemAlloc;
    int unused;

    sqlite3_status(SQLITE_STATUS_MEMORY_USED, &memoryUsed, &unused, 0);
    sqlite3_status(SQLITE_STATUS_MALLOC_SIZE, &unused, &largestMemAlloc, 0);
    sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &pageCacheOverflow, &unused, 0);
    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.memoryUsed, memoryUsed);
    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow,
            pageCacheOverflow);
    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, largestMemAlloc);
}

/*
 * JNI registration.
 */

static JNINativeMethod gMethods[] =
{
    { "nativeGetPagerStats", "(Lorg/sqlite/database/sqlite/SQLiteDebug$PagerStats;)V",
            (void*) nativeGetPagerStats },
};

#define FIND_CLASS(var, className) \
        var = env->FindClass(className); \
        LOG_FATAL_IF(! var, "Unable to find class " className);

#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
        LOG_FATAL_IF(! var, "Unable to find field " fieldName);

int register_android_database_SQLiteDebug(JNIEnv *env)
{
    jclass clazz;
    FIND_CLASS(clazz, "org/sqlite/database/sqlite/SQLiteDebug$PagerStats");

    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.memoryUsed, clazz,
            "memoryUsed", "I");
    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, clazz,
            "largestMemAlloc", "I");
    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow, clazz,
            "pageCacheOverflow", "I");

    return jniRegisterNativeMethods(env, "org/sqlite/database/sqlite/SQLiteDebug",
            gMethods, NELEM(gMethods));
}

} // namespace android






Deleted jni/android_database_SQLiteGlobal.cpp.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "SQLiteGlobal"

#include <jni.h>
#include <JNIHelp.h>
#include "ALog-priv.h"


#include <sqlite3.h>
#if 0
#include <sqlite3_android.h>
#endif


#include "android_database_SQLiteCommon.h"

namespace android {

// Limit heap to 8MB for now.  This is 4 times the maximum cursor window
// size, as has been used by the original code in SQLiteDatabase for
// a long time.
static const int SOFT_HEAP_LIMIT = 8 * 1024 * 1024;


// Called each time a message is logged.
static void sqliteLogCallback(void* data, int iErrCode, const char* zMsg) {
    bool verboseLog = !!data;
    if (iErrCode == 0 || iErrCode == SQLITE_CONSTRAINT || iErrCode == SQLITE_SCHEMA) {
        if (verboseLog) {
            ALOG(LOG_VERBOSE, SQLITE_LOG_TAG, "(%d) %s\n", iErrCode, zMsg);
        }
    } else {
        ALOG(LOG_ERROR, SQLITE_LOG_TAG, "(%d) %s\n", iErrCode, zMsg);
    }
}

// Sets the global SQLite configuration.
// This must be called before any other SQLite functions are called.
static void sqliteInitialize() {
    // Enable multi-threaded mode.  In this mode, SQLite is safe to use by multiple
    // threads as long as no two threads use the same database connection at the same
    // time (which we guarantee in the SQLite database wrappers).
    sqlite3_config(SQLITE_CONFIG_MULTITHREAD);

    // Redirect SQLite log messages to the Android log.
#if 0
    bool verboseLog = android_util_Log_isVerboseLogEnabled(SQLITE_LOG_TAG);
#endif
    bool verboseLog = false;
    sqlite3_config(SQLITE_CONFIG_LOG, &sqliteLogCallback, verboseLog ? (void*)1 : NULL);

    // The soft heap limit prevents the page cache allocations from growing
    // beyond the given limit, no matter what the max page cache sizes are
    // set to. The limit does not, as of 3.5.0, affect any other allocations.
    sqlite3_soft_heap_limit(SOFT_HEAP_LIMIT);

    // Initialize SQLite.
    sqlite3_initialize();
}

static jint nativeReleaseMemory(JNIEnv* env, jclass clazz) {
    return sqlite3_release_memory(SOFT_HEAP_LIMIT);
}

static JNINativeMethod sMethods[] =
{
    /* name, signature, funcPtr */
    { "nativeReleaseMemory", "()I",
            (void*)nativeReleaseMemory },
};

int register_android_database_SQLiteGlobal(JNIEnv *env)
{
    sqliteInitialize();

    return jniRegisterNativeMethods(env, "org/sqlite/database/sqlite/SQLiteGlobal",
            sMethods, NELEM(sMethods));
}

} // namespace android






Deleted jni/nativehelper/JNIHelp.h.





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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * JNI helper functions.
 *
 * This file may be included by C or C++ code, which is trouble because jni.h
 * uses different typedefs for JNIEnv in each language.
 *
 * TODO: remove C support.
 */
#ifndef NATIVEHELPER_JNIHELP_H_
#define NATIVEHELPER_JNIHELP_H_

#include "jni.h"
#include <unistd.h>

#ifndef NELEM
# define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Register one or more native methods with a particular class.
 * "className" looks like "java/lang/String". Aborts on failure.
 * TODO: fix all callers and change the return type to void.
 */
int jniRegisterNativeMethods(C_JNIEnv* env, const char* className, const JNINativeMethod* gMethods, int numMethods);

/*
 * Throw an exception with the specified class and an optional message.
 *
 * The "className" argument will be passed directly to FindClass, which
 * takes strings with slashes (e.g. "java/lang/Object").
 *
 * If an exception is currently pending, we log a warning message and
 * clear it.
 *
 * Returns 0 on success, nonzero if something failed (e.g. the exception
 * class couldn't be found, so *an* exception will still be pending).
 *
 * Currently aborts the VM if it can't throw the exception.
 */
int jniThrowException(C_JNIEnv* env, const char* className, const char* msg);

/*
 * Throw a java.lang.NullPointerException, with an optional message.
 */
int jniThrowNullPointerException(C_JNIEnv* env, const char* msg);

/*
 * Throw a java.lang.RuntimeException, with an optional message.
 */
int jniThrowRuntimeException(C_JNIEnv* env, const char* msg);

/*
 * Throw a java.io.IOException, generating the message from errno.
 */
int jniThrowIOException(C_JNIEnv* env, int errnum);

/*
 * Return a pointer to a locale-dependent error string explaining errno
 * value 'errnum'. The returned pointer may or may not be equal to 'buf'.
 * This function is thread-safe (unlike strerror) and portable (unlike
 * strerror_r).
 */
const char* jniStrError(int errnum, char* buf, size_t buflen);

/*
 * Returns a new java.io.FileDescriptor for the given int fd.
 */
jobject jniCreateFileDescriptor(C_JNIEnv* env, int fd);

/*
 * Returns the int fd from a java.io.FileDescriptor.
 */
int jniGetFDFromFileDescriptor(C_JNIEnv* env, jobject fileDescriptor);

/*
 * Sets the int fd in a java.io.FileDescriptor.
 */
void jniSetFileDescriptorOfFD(C_JNIEnv* env, jobject fileDescriptor, int value);

/*
 * Returns the reference from a java.lang.ref.Reference.
 */
jobject jniGetReferent(C_JNIEnv* env, jobject ref);

/*
 * Log a message and an exception.
 * If exception is NULL, logs the current exception in the JNI environment.
 */
void jniLogException(C_JNIEnv* env, int priority, const char* tag, jthrowable exception);

#ifdef __cplusplus
}
#endif


/*
 * For C++ code, we provide inlines that map to the C functions.  g++ always
 * inlines these, even on non-optimized builds.
 */
#if defined(__cplusplus)
inline int jniRegisterNativeMethods(JNIEnv* env, const char* className, const JNINativeMethod* gMethods, int numMethods) {
    return jniRegisterNativeMethods(&env->functions, className, gMethods, numMethods);
}

inline int jniThrowException(JNIEnv* env, const char* className, const char* msg) {
    return jniThrowException(&env->functions, className, msg);
}

extern "C" int jniThrowExceptionFmt(C_JNIEnv* env, const char* className, const char* fmt, va_list args);

/*
 * Equivalent to jniThrowException but with a printf-like format string and
 * variable-length argument list. This is only available in C++.
 */
inline int jniThrowExceptionFmt(JNIEnv* env, const char* className, const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);
    return jniThrowExceptionFmt(&env->functions, className, fmt, args);
    va_end(args);
}

inline int jniThrowNullPointerException(JNIEnv* env, const char* msg) {
    return jniThrowNullPointerException(&env->functions, msg);
}

inline int jniThrowRuntimeException(JNIEnv* env, const char* msg) {
    return jniThrowRuntimeException(&env->functions, msg);
}

inline int jniThrowIOException(JNIEnv* env, int errnum) {
    return jniThrowIOException(&env->functions, errnum);
}

inline jobject jniCreateFileDescriptor(JNIEnv* env, int fd) {
    return jniCreateFileDescriptor(&env->functions, fd);
}

inline int jniGetFDFromFileDescriptor(JNIEnv* env, jobject fileDescriptor) {
    return jniGetFDFromFileDescriptor(&env->functions, fileDescriptor);
}

inline void jniSetFileDescriptorOfFD(JNIEnv* env, jobject fileDescriptor, int value) {
    jniSetFileDescriptorOfFD(&env->functions, fileDescriptor, value);
}

inline jobject jniGetReferent(JNIEnv* env, jobject ref) {
    return jniGetReferent(&env->functions, ref);
}

inline void jniLogException(JNIEnv* env, int priority, const char* tag, jthrowable exception = NULL) {
    jniLogException(&env->functions, priority, tag, exception);
}

#endif

/*
 * TEMP_FAILURE_RETRY is defined by some, but not all, versions of
 * <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's
 * not already defined, then define it here.
 */
#ifndef TEMP_FAILURE_RETRY
/* Used to retry syscalls that can return EINTR. */
#define TEMP_FAILURE_RETRY(exp) ({         \
    typeof (exp) _rc;                      \
    do {                                   \
        _rc = (exp);                       \
    } while (_rc == -1 && errno == EINTR); \
    _rc; })
#endif

#endif  /* NATIVEHELPER_JNIHELP_H_ */






Deleted jni/nativehelper/JniConstants.h.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef JNI_CONSTANTS_H_included
#define JNI_CONSTANTS_H_included

#include "JNIHelp.h"

/**
 * A cache to avoid calling FindClass at runtime.
 *
 * Class lookup is relatively expensive (2.5us on passion-eng at the time of writing), so we do
 * all such lookups eagerly at startup. This means that code that never uses, say,
 * java.util.zip.Deflater still has to pay for the lookup, but it means that on a device the cost
 * is definitely paid during boot and amortized. A central cache also removes the temptation to
 * dynamically call FindClass rather than add a small cache to each file that needs one. Another
 * cost is that each class cached here requires a global reference, though in practice we save
 * enough by not having a global reference for each file that uses a class such as java.lang.String
 * which is used in several files.
 *
 * FindClass is still called in a couple of situations: when throwing exceptions, and in some of
 * the serialization code. The former is clearly not a performance case, and we're currently
 * assuming that neither is the latter.
 *
 * TODO: similar arguments hold for field and method IDs; we should cache them centrally too.
 */
struct JniConstants {
    static void init(JNIEnv* env);

    static jclass bidiRunClass;
    static jclass bigDecimalClass;
    static jclass booleanClass;
    static jclass byteArrayClass;
    static jclass byteClass;
    static jclass calendarClass;
    static jclass characterClass;
    static jclass charsetICUClass;
    static jclass constructorClass;
    static jclass deflaterClass;
    static jclass doubleClass;
    static jclass errnoExceptionClass;
    static jclass fieldClass;
    static jclass fieldPositionIteratorClass;
    static jclass fileDescriptorClass;
    static jclass floatClass;
    static jclass gaiExceptionClass;
    static jclass inet6AddressClass;
    static jclass inetAddressClass;
    static jclass inetSocketAddressClass;
    static jclass inetUnixAddressClass;
    static jclass inflaterClass;
    static jclass inputStreamClass;
    static jclass integerClass;
    static jclass localeDataClass;
    static jclass longClass;
    static jclass methodClass;
    static jclass mutableIntClass;
    static jclass mutableLongClass;
    static jclass objectClass;
    static jclass objectArrayClass;
    static jclass outputStreamClass;
    static jclass parsePositionClass;
    static jclass patternSyntaxExceptionClass;
    static jclass realToStringClass;
    static jclass referenceClass;
    static jclass shortClass;
    static jclass socketClass;
    static jclass socketImplClass;
    static jclass stringClass;
    static jclass structAddrinfoClass;
    static jclass structFlockClass;
    static jclass structGroupReqClass;
    static jclass structLingerClass;
    static jclass structPasswdClass;
    static jclass structPollfdClass;
    static jclass structStatClass;
    static jclass structStatVfsClass;
    static jclass structTimevalClass;
    static jclass structUcredClass;
    static jclass structUtsnameClass;
};

#define NATIVE_METHOD(className, functionName, signature) \
    { #functionName, signature, reinterpret_cast<void*>(className ## _ ## functionName) }

#endif  // JNI_CONSTANTS_H_included






Deleted jni/nativehelper/ScopedLocalRef.h.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef SCOPED_LOCAL_REF_H_included
#define SCOPED_LOCAL_REF_H_included

#include "jni.h"

#include <stddef.h>

// A smart pointer that deletes a JNI local reference when it goes out of scope.
template<typename T>
class ScopedLocalRef {
public:
    ScopedLocalRef(JNIEnv* env, T localRef) : mEnv(env), mLocalRef(localRef) {
    }

    ~ScopedLocalRef() {
        reset();
    }

    void reset(T ptr = NULL) {
        if (ptr != mLocalRef) {
            if (mLocalRef != NULL) {
                mEnv->DeleteLocalRef(mLocalRef);
            }
            mLocalRef = ptr;
        }
    }

    T release() __attribute__((warn_unused_result)) {
        T localRef = mLocalRef;
        mLocalRef = NULL;
        return localRef;
    }

    T get() const {
        return mLocalRef;
    }

private:
    JNIEnv* mEnv;
    T mLocalRef;

    // Disallow copy and assignment.
    ScopedLocalRef(const ScopedLocalRef&);
    void operator=(const ScopedLocalRef&);
};

#endif  // SCOPED_LOCAL_REF_H_included






Deleted jni/nativehelper/jni.h.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * JNI specification, as defined by Sun:
 * http://java.sun.com/javase/6/docs/technotes/guides/jni/spec/jniTOC.html
 *
 * Everything here is expected to be VM-neutral.
 */

#ifndef JNI_H_
#define JNI_H_

#include <stdarg.h>
#include <stdint.h>

/* Primitive types that match up with Java equivalents. */
typedef uint8_t  jboolean; /* unsigned 8 bits */
typedef int8_t   jbyte;    /* signed 8 bits */
typedef uint16_t jchar;    /* unsigned 16 bits */
typedef int16_t  jshort;   /* signed 16 bits */
typedef int32_t  jint;     /* signed 32 bits */
typedef int64_t  jlong;    /* signed 64 bits */
typedef float    jfloat;   /* 32-bit IEEE 754 */
typedef double   jdouble;  /* 64-bit IEEE 754 */

/* "cardinal indices and sizes" */
typedef jint     jsize;

#ifdef __cplusplus
/*
 * Reference types, in C++
 */
class _jobject {};
class _jclass : public _jobject {};
class _jstring : public _jobject {};
class _jarray : public _jobject {};
class _jobjectArray : public _jarray {};
class _jbooleanArray : public _jarray {};
class _jbyteArray : public _jarray {};
class _jcharArray : public _jarray {};
class _jshortArray : public _jarray {};
class _jintArray : public _jarray {};
class _jlongArray : public _jarray {};
class _jfloatArray : public _jarray {};
class _jdoubleArray : public _jarray {};
class _jthrowable : public _jobject {};

typedef _jobject*       jobject;
typedef _jclass*        jclass;
typedef _jstring*       jstring;
typedef _jarray*        jarray;
typedef _jobjectArray*  jobjectArray;
typedef _jbooleanArray* jbooleanArray;
typedef _jbyteArray*    jbyteArray;
typedef _jcharArray*    jcharArray;
typedef _jshortArray*   jshortArray;
typedef _jintArray*     jintArray;
typedef _jlongArray*    jlongArray;
typedef _jfloatArray*   jfloatArray;
typedef _jdoubleArray*  jdoubleArray;
typedef _jthrowable*    jthrowable;
typedef _jobject*       jweak;


#else /* not __cplusplus */

/*
 * Reference types, in C.
 */
typedef void*           jobject;
typedef jobject         jclass;
typedef jobject         jstring;
typedef jobject         jarray;
typedef jarray          jobjectArray;
typedef jarray          jbooleanArray;
typedef jarray          jbyteArray;
typedef jarray          jcharArray;
typedef jarray          jshortArray;
typedef jarray          jintArray;
typedef jarray          jlongArray;
typedef jarray          jfloatArray;
typedef jarray          jdoubleArray;
typedef jobject         jthrowable;
typedef jobject         jweak;

#endif /* not __cplusplus */

struct _jfieldID;                       /* opaque structure */
typedef struct _jfieldID* jfieldID;     /* field IDs */

struct _jmethodID;                      /* opaque structure */
typedef struct _jmethodID* jmethodID;   /* method IDs */

struct JNIInvokeInterface;

typedef union jvalue {
    jboolean    z;
    jbyte       b;
    jchar       c;
    jshort      s;
    jint        i;
    jlong       j;
    jfloat      f;
    jdouble     d;
    jobject     l;
} jvalue;

typedef enum jobjectRefType {
    JNIInvalidRefType = 0,
    JNILocalRefType = 1,
    JNIGlobalRefType = 2,
    JNIWeakGlobalRefType = 3
} jobjectRefType;

typedef struct {
    const char* name;
    const char* signature;
    void*       fnPtr;
} JNINativeMethod;

struct _JNIEnv;
struct _JavaVM;
typedef const struct JNINativeInterface* C_JNIEnv;

#if defined(__cplusplus)
typedef _JNIEnv JNIEnv;
typedef _JavaVM JavaVM;
#else
typedef const struct JNINativeInterface* JNIEnv;
typedef const struct JNIInvokeInterface* JavaVM;
#endif

/*
 * Table of interface function pointers.
 */
struct JNINativeInterface {
    void*       reserved0;
    void*       reserved1;
    void*       reserved2;
    void*       reserved3;

    jint        (*GetVersion)(JNIEnv *);

    jclass      (*DefineClass)(JNIEnv*, const char*, jobject, const jbyte*,
                        jsize);
    jclass      (*FindClass)(JNIEnv*, const char*);

    jmethodID   (*FromReflectedMethod)(JNIEnv*, jobject);
    jfieldID    (*FromReflectedField)(JNIEnv*, jobject);
    /* spec doesn't show jboolean parameter */
    jobject     (*ToReflectedMethod)(JNIEnv*, jclass, jmethodID, jboolean);

    jclass      (*GetSuperclass)(JNIEnv*, jclass);
    jboolean    (*IsAssignableFrom)(JNIEnv*, jclass, jclass);

    /* spec doesn't show jboolean parameter */
    jobject     (*ToReflectedField)(JNIEnv*, jclass, jfieldID, jboolean);

    jint        (*Throw)(JNIEnv*, jthrowable);
    jint        (*ThrowNew)(JNIEnv *, jclass, const char *);
    jthrowable  (*ExceptionOccurred)(JNIEnv*);
    void        (*ExceptionDescribe)(JNIEnv*);
    void        (*ExceptionClear)(JNIEnv*);
    void        (*FatalError)(JNIEnv*, const char*);

    jint        (*PushLocalFrame)(JNIEnv*, jint);
    jobject     (*PopLocalFrame)(JNIEnv*, jobject);

    jobject     (*NewGlobalRef)(JNIEnv*, jobject);
    void        (*DeleteGlobalRef)(JNIEnv*, jobject);
    void        (*DeleteLocalRef)(JNIEnv*, jobject);
    jboolean    (*IsSameObject)(JNIEnv*, jobject, jobject);

    jobject     (*NewLocalRef)(JNIEnv*, jobject);
    jint        (*EnsureLocalCapacity)(JNIEnv*, jint);

    jobject     (*AllocObject)(JNIEnv*, jclass);
    jobject     (*NewObject)(JNIEnv*, jclass, jmethodID, ...);
    jobject     (*NewObjectV)(JNIEnv*, jclass, jmethodID, va_list);
    jobject     (*NewObjectA)(JNIEnv*, jclass, jmethodID, jvalue*);

    jclass      (*GetObjectClass)(JNIEnv*, jobject);
    jboolean    (*IsInstanceOf)(JNIEnv*, jobject, jclass);
    jmethodID   (*GetMethodID)(JNIEnv*, jclass, const char*, const char*);

    jobject     (*CallObjectMethod)(JNIEnv*, jobject, jmethodID, ...);
    jobject     (*CallObjectMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jobject     (*CallObjectMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jboolean    (*CallBooleanMethod)(JNIEnv*, jobject, jmethodID, ...);
    jboolean    (*CallBooleanMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jboolean    (*CallBooleanMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jbyte       (*CallByteMethod)(JNIEnv*, jobject, jmethodID, ...);
    jbyte       (*CallByteMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jbyte       (*CallByteMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jchar       (*CallCharMethod)(JNIEnv*, jobject, jmethodID, ...);
    jchar       (*CallCharMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jchar       (*CallCharMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jshort      (*CallShortMethod)(JNIEnv*, jobject, jmethodID, ...);
    jshort      (*CallShortMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jshort      (*CallShortMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jint        (*CallIntMethod)(JNIEnv*, jobject, jmethodID, ...);
    jint        (*CallIntMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jint        (*CallIntMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jlong       (*CallLongMethod)(JNIEnv*, jobject, jmethodID, ...);
    jlong       (*CallLongMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jlong       (*CallLongMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jfloat      (*CallFloatMethod)(JNIEnv*, jobject, jmethodID, ...);
    jfloat      (*CallFloatMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jfloat      (*CallFloatMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jdouble     (*CallDoubleMethod)(JNIEnv*, jobject, jmethodID, ...);
    jdouble     (*CallDoubleMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jdouble     (*CallDoubleMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    void        (*CallVoidMethod)(JNIEnv*, jobject, jmethodID, ...);
    void        (*CallVoidMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    void        (*CallVoidMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);

    jobject     (*CallNonvirtualObjectMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jobject     (*CallNonvirtualObjectMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jobject     (*CallNonvirtualObjectMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jboolean    (*CallNonvirtualBooleanMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jboolean    (*CallNonvirtualBooleanMethodV)(JNIEnv*, jobject, jclass,
                         jmethodID, va_list);
    jboolean    (*CallNonvirtualBooleanMethodA)(JNIEnv*, jobject, jclass,
                         jmethodID, jvalue*);
    jbyte       (*CallNonvirtualByteMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jbyte       (*CallNonvirtualByteMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jbyte       (*CallNonvirtualByteMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jchar       (*CallNonvirtualCharMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jchar       (*CallNonvirtualCharMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jchar       (*CallNonvirtualCharMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jshort      (*CallNonvirtualShortMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jshort      (*CallNonvirtualShortMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jshort      (*CallNonvirtualShortMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jint        (*CallNonvirtualIntMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jint        (*CallNonvirtualIntMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jint        (*CallNonvirtualIntMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jlong       (*CallNonvirtualLongMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jlong       (*CallNonvirtualLongMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jlong       (*CallNonvirtualLongMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jfloat      (*CallNonvirtualFloatMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jfloat      (*CallNonvirtualFloatMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jfloat      (*CallNonvirtualFloatMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jdouble     (*CallNonvirtualDoubleMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jdouble     (*CallNonvirtualDoubleMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jdouble     (*CallNonvirtualDoubleMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    void        (*CallNonvirtualVoidMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    void        (*CallNonvirtualVoidMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    void        (*CallNonvirtualVoidMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);

    jfieldID    (*GetFieldID)(JNIEnv*, jclass, const char*, const char*);

    jobject     (*GetObjectField)(JNIEnv*, jobject, jfieldID);
    jboolean    (*GetBooleanField)(JNIEnv*, jobject, jfieldID);
    jbyte       (*GetByteField)(JNIEnv*, jobject, jfieldID);
    jchar       (*GetCharField)(JNIEnv*, jobject, jfieldID);
    jshort      (*GetShortField)(JNIEnv*, jobject, jfieldID);
    jint        (*GetIntField)(JNIEnv*, jobject, jfieldID);
    jlong       (*GetLongField)(JNIEnv*, jobject, jfieldID);
    jfloat      (*GetFloatField)(JNIEnv*, jobject, jfieldID);
    jdouble     (*GetDoubleField)(JNIEnv*, jobject, jfieldID);

    void        (*SetObjectField)(JNIEnv*, jobject, jfieldID, jobject);
    void        (*SetBooleanField)(JNIEnv*, jobject, jfieldID, jboolean);
    void        (*SetByteField)(JNIEnv*, jobject, jfieldID, jbyte);
    void        (*SetCharField)(JNIEnv*, jobject, jfieldID, jchar);
    void        (*SetShortField)(JNIEnv*, jobject, jfieldID, jshort);
    void        (*SetIntField)(JNIEnv*, jobject, jfieldID, jint);
    void        (*SetLongField)(JNIEnv*, jobject, jfieldID, jlong);
    void        (*SetFloatField)(JNIEnv*, jobject, jfieldID, jfloat);
    void        (*SetDoubleField)(JNIEnv*, jobject, jfieldID, jdouble);

    jmethodID   (*GetStaticMethodID)(JNIEnv*, jclass, const char*, const char*);

    jobject     (*CallStaticObjectMethod)(JNIEnv*, jclass, jmethodID, ...);
    jobject     (*CallStaticObjectMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jobject     (*CallStaticObjectMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jboolean    (*CallStaticBooleanMethod)(JNIEnv*, jclass, jmethodID, ...);
    jboolean    (*CallStaticBooleanMethodV)(JNIEnv*, jclass, jmethodID,
                        va_list);
    jboolean    (*CallStaticBooleanMethodA)(JNIEnv*, jclass, jmethodID,
                        jvalue*);
    jbyte       (*CallStaticByteMethod)(JNIEnv*, jclass, jmethodID, ...);
    jbyte       (*CallStaticByteMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jbyte       (*CallStaticByteMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jchar       (*CallStaticCharMethod)(JNIEnv*, jclass, jmethodID, ...);
    jchar       (*CallStaticCharMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jchar       (*CallStaticCharMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jshort      (*CallStaticShortMethod)(JNIEnv*, jclass, jmethodID, ...);
    jshort      (*CallStaticShortMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jshort      (*CallStaticShortMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jint        (*CallStaticIntMethod)(JNIEnv*, jclass, jmethodID, ...);
    jint        (*CallStaticIntMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jint        (*CallStaticIntMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jlong       (*CallStaticLongMethod)(JNIEnv*, jclass, jmethodID, ...);
    jlong       (*CallStaticLongMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jlong       (*CallStaticLongMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jfloat      (*CallStaticFloatMethod)(JNIEnv*, jclass, jmethodID, ...);
    jfloat      (*CallStaticFloatMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jfloat      (*CallStaticFloatMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jdouble     (*CallStaticDoubleMethod)(JNIEnv*, jclass, jmethodID, ...);
    jdouble     (*CallStaticDoubleMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jdouble     (*CallStaticDoubleMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    void        (*CallStaticVoidMethod)(JNIEnv*, jclass, jmethodID, ...);
    void        (*CallStaticVoidMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    void        (*CallStaticVoidMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);

    jfieldID    (*GetStaticFieldID)(JNIEnv*, jclass, const char*,
                        const char*);

    jobject     (*GetStaticObjectField)(JNIEnv*, jclass, jfieldID);
    jboolean    (*GetStaticBooleanField)(JNIEnv*, jclass, jfieldID);
    jbyte       (*GetStaticByteField)(JNIEnv*, jclass, jfieldID);
    jchar       (*GetStaticCharField)(JNIEnv*, jclass, jfieldID);
    jshort      (*GetStaticShortField)(JNIEnv*, jclass, jfieldID);
    jint        (*GetStaticIntField)(JNIEnv*, jclass, jfieldID);
    jlong       (*GetStaticLongField)(JNIEnv*, jclass, jfieldID);
    jfloat      (*GetStaticFloatField)(JNIEnv*, jclass, jfieldID);
    jdouble     (*GetStaticDoubleField)(JNIEnv*, jclass, jfieldID);

    void        (*SetStaticObjectField)(JNIEnv*, jclass, jfieldID, jobject);
    void        (*SetStaticBooleanField)(JNIEnv*, jclass, jfieldID, jboolean);
    void        (*SetStaticByteField)(JNIEnv*, jclass, jfieldID, jbyte);
    void        (*SetStaticCharField)(JNIEnv*, jclass, jfieldID, jchar);
    void        (*SetStaticShortField)(JNIEnv*, jclass, jfieldID, jshort);
    void        (*SetStaticIntField)(JNIEnv*, jclass, jfieldID, jint);
    void        (*SetStaticLongField)(JNIEnv*, jclass, jfieldID, jlong);
    void        (*SetStaticFloatField)(JNIEnv*, jclass, jfieldID, jfloat);
    void        (*SetStaticDoubleField)(JNIEnv*, jclass, jfieldID, jdouble);

    jstring     (*NewString)(JNIEnv*, const jchar*, jsize);
    jsize       (*GetStringLength)(JNIEnv*, jstring);
    const jchar* (*GetStringChars)(JNIEnv*, jstring, jboolean*);
    void        (*ReleaseStringChars)(JNIEnv*, jstring, const jchar*);
    jstring     (*NewStringUTF)(JNIEnv*, const char*);
    jsize       (*GetStringUTFLength)(JNIEnv*, jstring);
    /* JNI spec says this returns const jbyte*, but that's inconsistent */
    const char* (*GetStringUTFChars)(JNIEnv*, jstring, jboolean*);
    void        (*ReleaseStringUTFChars)(JNIEnv*, jstring, const char*);
    jsize       (*GetArrayLength)(JNIEnv*, jarray);
    jobjectArray (*NewObjectArray)(JNIEnv*, jsize, jclass, jobject);
    jobject     (*GetObjectArrayElement)(JNIEnv*, jobjectArray, jsize);
    void        (*SetObjectArrayElement)(JNIEnv*, jobjectArray, jsize, jobject);

    jbooleanArray (*NewBooleanArray)(JNIEnv*, jsize);
    jbyteArray    (*NewByteArray)(JNIEnv*, jsize);
    jcharArray    (*NewCharArray)(JNIEnv*, jsize);
    jshortArray   (*NewShortArray)(JNIEnv*, jsize);
    jintArray     (*NewIntArray)(JNIEnv*, jsize);
    jlongArray    (*NewLongArray)(JNIEnv*, jsize);
    jfloatArray   (*NewFloatArray)(JNIEnv*, jsize);
    jdoubleArray  (*NewDoubleArray)(JNIEnv*, jsize);

    jboolean*   (*GetBooleanArrayElements)(JNIEnv*, jbooleanArray, jboolean*);
    jbyte*      (*GetByteArrayElements)(JNIEnv*, jbyteArray, jboolean*);
    jchar*      (*GetCharArrayElements)(JNIEnv*, jcharArray, jboolean*);
    jshort*     (*GetShortArrayElements)(JNIEnv*, jshortArray, jboolean*);
    jint*       (*GetIntArrayElements)(JNIEnv*, jintArray, jboolean*);
    jlong*      (*GetLongArrayElements)(JNIEnv*, jlongArray, jboolean*);
    jfloat*     (*GetFloatArrayElements)(JNIEnv*, jfloatArray, jboolean*);
    jdouble*    (*GetDoubleArrayElements)(JNIEnv*, jdoubleArray, jboolean*);

    void        (*ReleaseBooleanArrayElements)(JNIEnv*, jbooleanArray,
                        jboolean*, jint);
    void        (*ReleaseByteArrayElements)(JNIEnv*, jbyteArray,
                        jbyte*, jint);
    void        (*ReleaseCharArrayElements)(JNIEnv*, jcharArray,
                        jchar*, jint);
    void        (*ReleaseShortArrayElements)(JNIEnv*, jshortArray,
                        jshort*, jint);
    void        (*ReleaseIntArrayElements)(JNIEnv*, jintArray,
                        jint*, jint);
    void        (*ReleaseLongArrayElements)(JNIEnv*, jlongArray,
                        jlong*, jint);
    void        (*ReleaseFloatArrayElements)(JNIEnv*, jfloatArray,
                        jfloat*, jint);
    void        (*ReleaseDoubleArrayElements)(JNIEnv*, jdoubleArray,
                        jdouble*, jint);

    void        (*GetBooleanArrayRegion)(JNIEnv*, jbooleanArray,
                        jsize, jsize, jboolean*);
    void        (*GetByteArrayRegion)(JNIEnv*, jbyteArray,
                        jsize, jsize, jbyte*);
    void        (*GetCharArrayRegion)(JNIEnv*, jcharArray,
                        jsize, jsize, jchar*);
    void        (*GetShortArrayRegion)(JNIEnv*, jshortArray,
                        jsize, jsize, jshort*);
    void        (*GetIntArrayRegion)(JNIEnv*, jintArray,
                        jsize, jsize, jint*);
    void        (*GetLongArrayRegion)(JNIEnv*, jlongArray,
                        jsize, jsize, jlong*);
    void        (*GetFloatArrayRegion)(JNIEnv*, jfloatArray,
                        jsize, jsize, jfloat*);
    void        (*GetDoubleArrayRegion)(JNIEnv*, jdoubleArray,
                        jsize, jsize, jdouble*);

    /* spec shows these without const; some jni.h do, some don't */
    void        (*SetBooleanArrayRegion)(JNIEnv*, jbooleanArray,
                        jsize, jsize, const jboolean*);
    void        (*SetByteArrayRegion)(JNIEnv*, jbyteArray,
                        jsize, jsize, const jbyte*);
    void        (*SetCharArrayRegion)(JNIEnv*, jcharArray,
                        jsize, jsize, const jchar*);
    void        (*SetShortArrayRegion)(JNIEnv*, jshortArray,
                        jsize, jsize, const jshort*);
    void        (*SetIntArrayRegion)(JNIEnv*, jintArray,
                        jsize, jsize, const jint*);
    void        (*SetLongArrayRegion)(JNIEnv*, jlongArray,
                        jsize, jsize, const jlong*);
    void        (*SetFloatArrayRegion)(JNIEnv*, jfloatArray,
                        jsize, jsize, const jfloat*);
    void        (*SetDoubleArrayRegion)(JNIEnv*, jdoubleArray,
                        jsize, jsize, const jdouble*);

    jint        (*RegisterNatives)(JNIEnv*, jclass, const JNINativeMethod*,
                        jint);
    jint        (*UnregisterNatives)(JNIEnv*, jclass);
    jint        (*MonitorEnter)(JNIEnv*, jobject);
    jint        (*MonitorExit)(JNIEnv*, jobject);
    jint        (*GetJavaVM)(JNIEnv*, JavaVM**);

    void        (*GetStringRegion)(JNIEnv*, jstring, jsize, jsize, jchar*);
    void        (*GetStringUTFRegion)(JNIEnv*, jstring, jsize, jsize, char*);

    void*       (*GetPrimitiveArrayCritical)(JNIEnv*, jarray, jboolean*);
    void        (*ReleasePrimitiveArrayCritical)(JNIEnv*, jarray, void*, jint);

    const jchar* (*GetStringCritical)(JNIEnv*, jstring, jboolean*);
    void        (*ReleaseStringCritical)(JNIEnv*, jstring, const jchar*);

    jweak       (*NewWeakGlobalRef)(JNIEnv*, jobject);
    void        (*DeleteWeakGlobalRef)(JNIEnv*, jweak);

    jboolean    (*ExceptionCheck)(JNIEnv*);

    jobject     (*NewDirectByteBuffer)(JNIEnv*, void*, jlong);
    void*       (*GetDirectBufferAddress)(JNIEnv*, jobject);
    jlong       (*GetDirectBufferCapacity)(JNIEnv*, jobject);

    /* added in JNI 1.6 */
    jobjectRefType (*GetObjectRefType)(JNIEnv*, jobject);
};

/*
 * C++ object wrapper.
 *
 * This is usually overlaid on a C struct whose first element is a
 * JNINativeInterface*.  We rely somewhat on compiler behavior.
 */
struct _JNIEnv {
    /* do not rename this; it does not seem to be entirely opaque */
    const struct JNINativeInterface* functions;

#if defined(__cplusplus)

    jint GetVersion()
    { return functions->GetVersion(this); }

    jclass DefineClass(const char *name, jobject loader, const jbyte* buf,
        jsize bufLen)
    { return functions->DefineClass(this, name, loader, buf, bufLen); }

    jclass FindClass(const char* name)
    { return functions->FindClass(this, name); }

    jmethodID FromReflectedMethod(jobject method)
    { return functions->FromReflectedMethod(this, method); }

    jfieldID FromReflectedField(jobject field)
    { return functions->FromReflectedField(this, field); }

    jobject ToReflectedMethod(jclass cls, jmethodID methodID, jboolean isStatic)
    { return functions->ToReflectedMethod(this, cls, methodID, isStatic); }

    jclass GetSuperclass(jclass clazz)
    { return functions->GetSuperclass(this, clazz); }

    jboolean IsAssignableFrom(jclass clazz1, jclass clazz2)
    { return functions->IsAssignableFrom(this, clazz1, clazz2); }

    jobject ToReflectedField(jclass cls, jfieldID fieldID, jboolean isStatic)
    { return functions->ToReflectedField(this, cls, fieldID, isStatic); }

    jint Throw(jthrowable obj)
    { return functions->Throw(this, obj); }

    jint ThrowNew(jclass clazz, const char* message)
    { return functions->ThrowNew(this, clazz, message); }

    jthrowable ExceptionOccurred()
    { return functions->ExceptionOccurred(this); }

    void ExceptionDescribe()
    { functions->ExceptionDescribe(this); }

    void ExceptionClear()
    { functions->ExceptionClear(this); }

    void FatalError(const char* msg)
    { functions->FatalError(this, msg); }

    jint PushLocalFrame(jint capacity)
    { return functions->PushLocalFrame(this, capacity); }

    jobject PopLocalFrame(jobject result)
    { return functions->PopLocalFrame(this, result); }

    jobject NewGlobalRef(jobject obj)
    { return functions->NewGlobalRef(this, obj); }

    void DeleteGlobalRef(jobject globalRef)
    { functions->DeleteGlobalRef(this, globalRef); }

    void DeleteLocalRef(jobject localRef)
    { functions->DeleteLocalRef(this, localRef); }

    jboolean IsSameObject(jobject ref1, jobject ref2)
    { return functions->IsSameObject(this, ref1, ref2); }

    jobject NewLocalRef(jobject ref)
    { return functions->NewLocalRef(this, ref); }

    jint EnsureLocalCapacity(jint capacity)
    { return functions->EnsureLocalCapacity(this, capacity); }

    jobject AllocObject(jclass clazz)
    { return functions->AllocObject(this, clazz); }

    jobject NewObject(jclass clazz, jmethodID methodID, ...)
    {
        va_list args;
        va_start(args, methodID);
        jobject result = functions->NewObjectV(this, clazz, methodID, args);
        va_end(args);
        return result;
    }

    jobject NewObjectV(jclass clazz, jmethodID methodID, va_list args)
    { return functions->NewObjectV(this, clazz, methodID, args); }

    jobject NewObjectA(jclass clazz, jmethodID methodID, jvalue* args)
    { return functions->NewObjectA(this, clazz, methodID, args); }

    jclass GetObjectClass(jobject obj)
    { return functions->GetObjectClass(this, obj); }

    jboolean IsInstanceOf(jobject obj, jclass clazz)
    { return functions->IsInstanceOf(this, obj, clazz); }

    jmethodID GetMethodID(jclass clazz, const char* name, const char* sig)
    { return functions->GetMethodID(this, clazz, name, sig); }

#define CALL_TYPE_METHOD(_jtype, _jname)                                    \
    _jtype Call##_jname##Method(jobject obj, jmethodID methodID, ...)       \
    {                                                                       \
        _jtype result;                                                      \
        va_list args;                                                       \
        va_start(args, methodID);                                           \
        result = functions->Call##_jname##MethodV(this, obj, methodID,      \
                    args);                                                  \
        va_end(args);                                                       \
        return result;                                                      \
    }
#define CALL_TYPE_METHODV(_jtype, _jname)                                   \
    _jtype Call##_jname##MethodV(jobject obj, jmethodID methodID,           \
        va_list args)                                                       \
    { return functions->Call##_jname##MethodV(this, obj, methodID, args); }
#define CALL_TYPE_METHODA(_jtype, _jname)                                   \
    _jtype Call##_jname##MethodA(jobject obj, jmethodID methodID,           \
        jvalue* args)                                                       \
    { return functions->Call##_jname##MethodA(this, obj, methodID, args); }

#define CALL_TYPE(_jtype, _jname)                                           \
    CALL_TYPE_METHOD(_jtype, _jname)                                        \
    CALL_TYPE_METHODV(_jtype, _jname)                                       \
    CALL_TYPE_METHODA(_jtype, _jname)

    CALL_TYPE(jobject, Object)
    CALL_TYPE(jboolean, Boolean)
    CALL_TYPE(jbyte, Byte)
    CALL_TYPE(jchar, Char)
    CALL_TYPE(jshort, Short)
    CALL_TYPE(jint, Int)
    CALL_TYPE(jlong, Long)
    CALL_TYPE(jfloat, Float)
    CALL_TYPE(jdouble, Double)

    void CallVoidMethod(jobject obj, jmethodID methodID, ...)
    {
        va_list args;
        va_start(args, methodID);
        functions->CallVoidMethodV(this, obj, methodID, args);
        va_end(args);
    }
    void CallVoidMethodV(jobject obj, jmethodID methodID, va_list args)
    { functions->CallVoidMethodV(this, obj, methodID, args); }
    void CallVoidMethodA(jobject obj, jmethodID methodID, jvalue* args)
    { functions->CallVoidMethodA(this, obj, methodID, args); }

#define CALL_NONVIRT_TYPE_METHOD(_jtype, _jname)                            \
    _jtype CallNonvirtual##_jname##Method(jobject obj, jclass clazz,        \
        jmethodID methodID, ...)                                            \
    {                                                                       \
        _jtype result;                                                      \
        va_list args;                                                       \
        va_start(args, methodID);                                           \
        result = functions->CallNonvirtual##_jname##MethodV(this, obj,      \
                    clazz, methodID, args);                                 \
        va_end(args);                                                       \
        return result;                                                      \
    }
#define CALL_NONVIRT_TYPE_METHODV(_jtype, _jname)                           \
    _jtype CallNonvirtual##_jname##MethodV(jobject obj, jclass clazz,       \
        jmethodID methodID, va_list args)                                   \
    { return functions->CallNonvirtual##_jname##MethodV(this, obj, clazz,   \
        methodID, args); }
#define CALL_NONVIRT_TYPE_METHODA(_jtype, _jname)                           \
    _jtype CallNonvirtual##_jname##MethodA(jobject obj, jclass clazz,       \
        jmethodID methodID, jvalue* args)                                   \
    { return functions->CallNonvirtual##_jname##MethodA(this, obj, clazz,   \
        methodID, args); }

#define CALL_NONVIRT_TYPE(_jtype, _jname)                                   \
    CALL_NONVIRT_TYPE_METHOD(_jtype, _jname)                                \
    CALL_NONVIRT_TYPE_METHODV(_jtype, _jname)                               \
    CALL_NONVIRT_TYPE_METHODA(_jtype, _jname)

    CALL_NONVIRT_TYPE(jobject, Object)
    CALL_NONVIRT_TYPE(jboolean, Boolean)
    CALL_NONVIRT_TYPE(jbyte, Byte)
    CALL_NONVIRT_TYPE(jchar, Char)
    CALL_NONVIRT_TYPE(jshort, Short)
    CALL_NONVIRT_TYPE(jint, Int)
    CALL_NONVIRT_TYPE(jlong, Long)
    CALL_NONVIRT_TYPE(jfloat, Float)
    CALL_NONVIRT_TYPE(jdouble, Double)

    void CallNonvirtualVoidMethod(jobject obj, jclass clazz,
        jmethodID methodID, ...)
    {
        va_list args;
        va_start(args, methodID);
        functions->CallNonvirtualVoidMethodV(this, obj, clazz, methodID, args);
        va_end(args);
    }
    void CallNonvirtualVoidMethodV(jobject obj, jclass clazz,
        jmethodID methodID, va_list args)
    { functions->CallNonvirtualVoidMethodV(this, obj, clazz, methodID, args); }
    void CallNonvirtualVoidMethodA(jobject obj, jclass clazz,
        jmethodID methodID, jvalue* args)
    { functions->CallNonvirtualVoidMethodA(this, obj, clazz, methodID, args); }

    jfieldID GetFieldID(jclass clazz, const char* name, const char* sig)
    { return functions->GetFieldID(this, clazz, name, sig); }

    jobject GetObjectField(jobject obj, jfieldID fieldID)
    { return functions->GetObjectField(this, obj, fieldID); }
    jboolean GetBooleanField(jobject obj, jfieldID fieldID)
    { return functions->GetBooleanField(this, obj, fieldID); }
    jbyte GetByteField(jobject obj, jfieldID fieldID)
    { return functions->GetByteField(this, obj, fieldID); }
    jchar GetCharField(jobject obj, jfieldID fieldID)
    { return functions->GetCharField(this, obj, fieldID); }
    jshort GetShortField(jobject obj, jfieldID fieldID)
    { return functions->GetShortField(this, obj, fieldID); }
    jint GetIntField(jobject obj, jfieldID fieldID)
    { return functions->GetIntField(this, obj, fieldID); }
    jlong GetLongField(jobject obj, jfieldID fieldID)
    { return functions->GetLongField(this, obj, fieldID); }
    jfloat GetFloatField(jobject obj, jfieldID fieldID)
    { return functions->GetFloatField(this, obj, fieldID); }
    jdouble GetDoubleField(jobject obj, jfieldID fieldID)
    { return functions->GetDoubleField(this, obj, fieldID); }

    void SetObjectField(jobject obj, jfieldID fieldID, jobject value)
    { functions->SetObjectField(this, obj, fieldID, value); }
    void SetBooleanField(jobject obj, jfieldID fieldID, jboolean value)
    { functions->SetBooleanField(this, obj, fieldID, value); }
    void SetByteField(jobject obj, jfieldID fieldID, jbyte value)
    { functions->SetByteField(this, obj, fieldID, value); }
    void SetCharField(jobject obj, jfieldID fieldID, jchar value)
    { functions->SetCharField(this, obj, fieldID, value); }
    void SetShortField(jobject obj, jfieldID fieldID, jshort value)
    { functions->SetShortField(this, obj, fieldID, value); }
    void SetIntField(jobject obj, jfieldID fieldID, jint value)
    { functions->SetIntField(this, obj, fieldID, value); }
    void SetLongField(jobject obj, jfieldID fieldID, jlong value)
    { functions->SetLongField(this, obj, fieldID, value); }
    void SetFloatField(jobject obj, jfieldID fieldID, jfloat value)
    { functions->SetFloatField(this, obj, fieldID, value); }
    void SetDoubleField(jobject obj, jfieldID fieldID, jdouble value)
    { functions->SetDoubleField(this, obj, fieldID, value); }

    jmethodID GetStaticMethodID(jclass clazz, const char* name, const char* sig)
    { return functions->GetStaticMethodID(this, clazz, name, sig); }

#define CALL_STATIC_TYPE_METHOD(_jtype, _jname)                             \
    _jtype CallStatic##_jname##Method(jclass clazz, jmethodID methodID,     \
        ...)                                                                \
    {                                                                       \
        _jtype result;                                                      \
        va_list args;                                                       \
        va_start(args, methodID);                                           \
        result = functions->CallStatic##_jname##MethodV(this, clazz,        \
                    methodID, args);                                        \
        va_end(args);                                                       \
        return result;                                                      \
    }
#define CALL_STATIC_TYPE_METHODV(_jtype, _jname)                            \
    _jtype CallStatic##_jname##MethodV(jclass clazz, jmethodID methodID,    \
        va_list args)                                                       \
    { return functions->CallStatic##_jname##MethodV(this, clazz, methodID,  \
        args); }
#define CALL_STATIC_TYPE_METHODA(_jtype, _jname)                            \
    _jtype CallStatic##_jname##MethodA(jclass clazz, jmethodID methodID,    \
        jvalue* args)                                                       \
    { return functions->CallStatic##_jname##MethodA(this, clazz, methodID,  \
        args); }

#define CALL_STATIC_TYPE(_jtype, _jname)                                    \
    CALL_STATIC_TYPE_METHOD(_jtype, _jname)                                 \
    CALL_STATIC_TYPE_METHODV(_jtype, _jname)                                \
    CALL_STATIC_TYPE_METHODA(_jtype, _jname)

    CALL_STATIC_TYPE(jobject, Object)
    CALL_STATIC_TYPE(jboolean, Boolean)
    CALL_STATIC_TYPE(jbyte, Byte)
    CALL_STATIC_TYPE(jchar, Char)
    CALL_STATIC_TYPE(jshort, Short)
    CALL_STATIC_TYPE(jint, Int)
    CALL_STATIC_TYPE(jlong, Long)
    CALL_STATIC_TYPE(jfloat, Float)
    CALL_STATIC_TYPE(jdouble, Double)

    void CallStaticVoidMethod(jclass clazz, jmethodID methodID, ...)
    {
        va_list args;
        va_start(args, methodID);
        functions->CallStaticVoidMethodV(this, clazz, methodID, args);
        va_end(args);
    }
    void CallStaticVoidMethodV(jclass clazz, jmethodID methodID, va_list args)
    { functions->CallStaticVoidMethodV(this, clazz, methodID, args); }
    void CallStaticVoidMethodA(jclass clazz, jmethodID methodID, jvalue* args)
    { functions->CallStaticVoidMethodA(this, clazz, methodID, args); }

    jfieldID GetStaticFieldID(jclass clazz, const char* name, const char* sig)
    { return functions->GetStaticFieldID(this, clazz, name, sig); }

    jobject GetStaticObjectField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticObjectField(this, clazz, fieldID); }
    jboolean GetStaticBooleanField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticBooleanField(this, clazz, fieldID); }
    jbyte GetStaticByteField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticByteField(this, clazz, fieldID); }
    jchar GetStaticCharField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticCharField(this, clazz, fieldID); }
    jshort GetStaticShortField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticShortField(this, clazz, fieldID); }
    jint GetStaticIntField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticIntField(this, clazz, fieldID); }
    jlong GetStaticLongField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticLongField(this, clazz, fieldID); }
    jfloat GetStaticFloatField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticFloatField(this, clazz, fieldID); }
    jdouble GetStaticDoubleField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticDoubleField(this, clazz, fieldID); }

    void SetStaticObjectField(jclass clazz, jfieldID fieldID, jobject value)
    { functions->SetStaticObjectField(this, clazz, fieldID, value); }
    void SetStaticBooleanField(jclass clazz, jfieldID fieldID, jboolean value)
    { functions->SetStaticBooleanField(this, clazz, fieldID, value); }
    void SetStaticByteField(jclass clazz, jfieldID fieldID, jbyte value)
    { functions->SetStaticByteField(this, clazz, fieldID, value); }
    void SetStaticCharField(jclass clazz, jfieldID fieldID, jchar value)
    { functions->SetStaticCharField(this, clazz, fieldID, value); }
    void SetStaticShortField(jclass clazz, jfieldID fieldID, jshort value)
    { functions->SetStaticShortField(this, clazz, fieldID, value); }
    void SetStaticIntField(jclass clazz, jfieldID fieldID, jint value)
    { functions->SetStaticIntField(this, clazz, fieldID, value); }
    void SetStaticLongField(jclass clazz, jfieldID fieldID, jlong value)
    { functions->SetStaticLongField(this, clazz, fieldID, value); }
    void SetStaticFloatField(jclass clazz, jfieldID fieldID, jfloat value)
    { functions->SetStaticFloatField(this, clazz, fieldID, value); }
    void SetStaticDoubleField(jclass clazz, jfieldID fieldID, jdouble value)
    { functions->SetStaticDoubleField(this, clazz, fieldID, value); }

    jstring NewString(const jchar* unicodeChars, jsize len)
    { return functions->NewString(this, unicodeChars, len); }

    jsize GetStringLength(jstring string)
    { return functions->GetStringLength(this, string); }

    const jchar* GetStringChars(jstring string, jboolean* isCopy)
    { return functions->GetStringChars(this, string, isCopy); }

    void ReleaseStringChars(jstring string, const jchar* chars)
    { functions->ReleaseStringChars(this, string, chars); }

    jstring NewStringUTF(const char* bytes)
    { return functions->NewStringUTF(this, bytes); }

    jsize GetStringUTFLength(jstring string)
    { return functions->GetStringUTFLength(this, string); }

    const char* GetStringUTFChars(jstring string, jboolean* isCopy)
    { return functions->GetStringUTFChars(this, string, isCopy); }

    void ReleaseStringUTFChars(jstring string, const char* utf)
    { functions->ReleaseStringUTFChars(this, string, utf); }

    jsize GetArrayLength(jarray array)
    { return functions->GetArrayLength(this, array); }

    jobjectArray NewObjectArray(jsize length, jclass elementClass,
        jobject initialElement)
    { return functions->NewObjectArray(this, length, elementClass,
        initialElement); }

    jobject GetObjectArrayElement(jobjectArray array, jsize index)
    { return functions->GetObjectArrayElement(this, array, index); }

    void SetObjectArrayElement(jobjectArray array, jsize index, jobject value)
    { functions->SetObjectArrayElement(this, array, index, value); }

    jbooleanArray NewBooleanArray(jsize length)
    { return functions->NewBooleanArray(this, length); }
    jbyteArray NewByteArray(jsize length)
    { return functions->NewByteArray(this, length); }
    jcharArray NewCharArray(jsize length)
    { return functions->NewCharArray(this, length); }
    jshortArray NewShortArray(jsize length)
    { return functions->NewShortArray(this, length); }
    jintArray NewIntArray(jsize length)
    { return functions->NewIntArray(this, length); }
    jlongArray NewLongArray(jsize length)
    { return functions->NewLongArray(this, length); }
    jfloatArray NewFloatArray(jsize length)
    { return functions->NewFloatArray(this, length); }
    jdoubleArray NewDoubleArray(jsize length)
    { return functions->NewDoubleArray(this, length); }

    jboolean* GetBooleanArrayElements(jbooleanArray array, jboolean* isCopy)
    { return functions->GetBooleanArrayElements(this, array, isCopy); }
    jbyte* GetByteArrayElements(jbyteArray array, jboolean* isCopy)
    { return functions->GetByteArrayElements(this, array, isCopy); }
    jchar* GetCharArrayElements(jcharArray array, jboolean* isCopy)
    { return functions->GetCharArrayElements(this, array, isCopy); }
    jshort* GetShortArrayElements(jshortArray array, jboolean* isCopy)
    { return functions->GetShortArrayElements(this, array, isCopy); }
    jint* GetIntArrayElements(jintArray array, jboolean* isCopy)
    { return functions->GetIntArrayElements(this, array, isCopy); }
    jlong* GetLongArrayElements(jlongArray array, jboolean* isCopy)
    { return functions->GetLongArrayElements(this, array, isCopy); }
    jfloat* GetFloatArrayElements(jfloatArray array, jboolean* isCopy)
    { return functions->GetFloatArrayElements(this, array, isCopy); }
    jdouble* GetDoubleArrayElements(jdoubleArray array, jboolean* isCopy)
    { return functions->GetDoubleArrayElements(this, array, isCopy); }

    void ReleaseBooleanArrayElements(jbooleanArray array, jboolean* elems,
        jint mode)
    { functions->ReleaseBooleanArrayElements(this, array, elems, mode); }
    void ReleaseByteArrayElements(jbyteArray array, jbyte* elems,
        jint mode)
    { functions->ReleaseByteArrayElements(this, array, elems, mode); }
    void ReleaseCharArrayElements(jcharArray array, jchar* elems,
        jint mode)
    { functions->ReleaseCharArrayElements(this, array, elems, mode); }
    void ReleaseShortArrayElements(jshortArray array, jshort* elems,
        jint mode)
    { functions->ReleaseShortArrayElements(this, array, elems, mode); }
    void ReleaseIntArrayElements(jintArray array, jint* elems,
        jint mode)
    { functions->ReleaseIntArrayElements(this, array, elems, mode); }
    void ReleaseLongArrayElements(jlongArray array, jlong* elems,
        jint mode)
    { functions->ReleaseLongArrayElements(this, array, elems, mode); }
    void ReleaseFloatArrayElements(jfloatArray array, jfloat* elems,
        jint mode)
    { functions->ReleaseFloatArrayElements(this, array, elems, mode); }
    void ReleaseDoubleArrayElements(jdoubleArray array, jdouble* elems,
        jint mode)
    { functions->ReleaseDoubleArrayElements(this, array, elems, mode); }

    void GetBooleanArrayRegion(jbooleanArray array, jsize start, jsize len,
        jboolean* buf)
    { functions->GetBooleanArrayRegion(this, array, start, len, buf); }
    void GetByteArrayRegion(jbyteArray array, jsize start, jsize len,
        jbyte* buf)
    { functions->GetByteArrayRegion(this, array, start, len, buf); }
    void GetCharArrayRegion(jcharArray array, jsize start, jsize len,
        jchar* buf)
    { functions->GetCharArrayRegion(this, array, start, len, buf); }
    void GetShortArrayRegion(jshortArray array, jsize start, jsize len,
        jshort* buf)
    { functions->GetShortArrayRegion(this, array, start, len, buf); }
    void GetIntArrayRegion(jintArray array, jsize start, jsize len,
        jint* buf)
    { functions->GetIntArrayRegion(this, array, start, len, buf); }
    void GetLongArrayRegion(jlongArray array, jsize start, jsize len,
        jlong* buf)
    { functions->GetLongArrayRegion(this, array, start, len, buf); }
    void GetFloatArrayRegion(jfloatArray array, jsize start, jsize len,
        jfloat* buf)
    { functions->GetFloatArrayRegion(this, array, start, len, buf); }
    void GetDoubleArrayRegion(jdoubleArray array, jsize start, jsize len,
        jdouble* buf)
    { functions->GetDoubleArrayRegion(this, array, start, len, buf); }

    void SetBooleanArrayRegion(jbooleanArray array, jsize start, jsize len,
        const jboolean* buf)
    { functions->SetBooleanArrayRegion(this, array, start, len, buf); }
    void SetByteArrayRegion(jbyteArray array, jsize start, jsize len,
        const jbyte* buf)
    { functions->SetByteArrayRegion(this, array, start, len, buf); }
    void SetCharArrayRegion(jcharArray array, jsize start, jsize len,
        const jchar* buf)
    { functions->SetCharArrayRegion(this, array, start, len, buf); }
    void SetShortArrayRegion(jshortArray array, jsize start, jsize len,
        const jshort* buf)
    { functions->SetShortArrayRegion(this, array, start, len, buf); }
    void SetIntArrayRegion(jintArray array, jsize start, jsize len,
        const jint* buf)
    { functions->SetIntArrayRegion(this, array, start, len, buf); }
    void SetLongArrayRegion(jlongArray array, jsize start, jsize len,
        const jlong* buf)
    { functions->SetLongArrayRegion(this, array, start, len, buf); }
    void SetFloatArrayRegion(jfloatArray array, jsize start, jsize len,
        const jfloat* buf)
    { functions->SetFloatArrayRegion(this, array, start, len, buf); }
    void SetDoubleArrayRegion(jdoubleArray array, jsize start, jsize len,
        const jdouble* buf)
    { functions->SetDoubleArrayRegion(this, array, start, len, buf); }

    jint RegisterNatives(jclass clazz, const JNINativeMethod* methods,
        jint nMethods)
    { return functions->RegisterNatives(this, clazz, methods, nMethods); }

    jint UnregisterNatives(jclass clazz)
    { return functions->UnregisterNatives(this, clazz); }

    jint MonitorEnter(jobject obj)
    { return functions->MonitorEnter(this, obj); }

    jint MonitorExit(jobject obj)
    { return functions->MonitorExit(this, obj); }

    jint GetJavaVM(JavaVM** vm)
    { return functions->GetJavaVM(this, vm); }

    void GetStringRegion(jstring str, jsize start, jsize len, jchar* buf)
    { functions->GetStringRegion(this, str, start, len, buf); }

    void GetStringUTFRegion(jstring str, jsize start, jsize len, char* buf)
    { return functions->GetStringUTFRegion(this, str, start, len, buf); }

    void* GetPrimitiveArrayCritical(jarray array, jboolean* isCopy)
    { return functions->GetPrimitiveArrayCritical(this, array, isCopy); }

    void ReleasePrimitiveArrayCritical(jarray array, void* carray, jint mode)
    { functions->ReleasePrimitiveArrayCritical(this, array, carray, mode); }

    const jchar* GetStringCritical(jstring string, jboolean* isCopy)
    { return functions->GetStringCritical(this, string, isCopy); }

    void ReleaseStringCritical(jstring string, const jchar* carray)
    { functions->ReleaseStringCritical(this, string, carray); }

    jweak NewWeakGlobalRef(jobject obj)
    { return functions->NewWeakGlobalRef(this, obj); }

    void DeleteWeakGlobalRef(jweak obj)
    { functions->DeleteWeakGlobalRef(this, obj); }

    jboolean ExceptionCheck()
    { return functions->ExceptionCheck(this); }

    jobject NewDirectByteBuffer(void* address, jlong capacity)
    { return functions->NewDirectByteBuffer(this, address, capacity); }

    void* GetDirectBufferAddress(jobject buf)
    { return functions->GetDirectBufferAddress(this, buf); }

    jlong GetDirectBufferCapacity(jobject buf)
    { return functions->GetDirectBufferCapacity(this, buf); }

    /* added in JNI 1.6 */
    jobjectRefType GetObjectRefType(jobject obj)
    { return functions->GetObjectRefType(this, obj); }
#endif /*__cplusplus*/
};


/*
 * JNI invocation interface.
 */
struct JNIInvokeInterface {
    void*       reserved0;
    void*       reserved1;
    void*       reserved2;

    jint        (*DestroyJavaVM)(JavaVM*);
    jint        (*AttachCurrentThread)(JavaVM*, JNIEnv**, void*);
    jint        (*DetachCurrentThread)(JavaVM*);
    jint        (*GetEnv)(JavaVM*, void**, jint);
    jint        (*AttachCurrentThreadAsDaemon)(JavaVM*, JNIEnv**, void*);
};

/*
 * C++ version.
 */
struct _JavaVM {
    const struct JNIInvokeInterface* functions;

#if defined(__cplusplus)
    jint DestroyJavaVM()
    { return functions->DestroyJavaVM(this); }
    jint AttachCurrentThread(JNIEnv** p_env, void* thr_args)
    { return functions->AttachCurrentThread(this, p_env, thr_args); }
    jint DetachCurrentThread()
    { return functions->DetachCurrentThread(this); }
    jint GetEnv(void** env, jint version)
    { return functions->GetEnv(this, env, version); }
    jint AttachCurrentThreadAsDaemon(JNIEnv** p_env, void* thr_args)
    { return functions->AttachCurrentThreadAsDaemon(this, p_env, thr_args); }
#endif /*__cplusplus*/
};

struct JavaVMAttachArgs {
    jint        version;    /* must be >= JNI_VERSION_1_2 */
    const char* name;       /* NULL or name of thread as modified UTF-8 str */
    jobject     group;      /* global ref of a ThreadGroup object, or NULL */
};
typedef struct JavaVMAttachArgs JavaVMAttachArgs;

/*
 * JNI 1.2+ initialization.  (As of 1.6, the pre-1.2 structures are no
 * longer supported.)
 */
typedef struct JavaVMOption {
    const char* optionString;
    void*       extraInfo;
} JavaVMOption;

typedef struct JavaVMInitArgs {
    jint        version;    /* use JNI_VERSION_1_2 or later */

    jint        nOptions;
    JavaVMOption* options;
    jboolean    ignoreUnrecognized;
} JavaVMInitArgs;

#ifdef __cplusplus
extern "C" {
#endif
/*
 * VM initialization functions.
 *
 * Note these are the only symbols exported for JNI by the VM.
 */
jint JNI_GetDefaultJavaVMInitArgs(void*);
jint JNI_CreateJavaVM(JavaVM**, JNIEnv**, void*);
jint JNI_GetCreatedJavaVMs(JavaVM**, jsize, jsize*);

#define JNIIMPORT
#define JNIEXPORT  __attribute__ ((visibility ("default")))
#define JNICALL

/*
 * Prototypes for functions exported by loadable shared libs.  These are
 * called by JNI, not provided by JNI.
 */
JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved);
JNIEXPORT void JNI_OnUnload(JavaVM* vm, void* reserved);

#ifdef __cplusplus
}
#endif


/*
 * Manifest constants.
 */
#define JNI_FALSE   0
#define JNI_TRUE    1

#define JNI_VERSION_1_1 0x00010001
#define JNI_VERSION_1_2 0x00010002
#define JNI_VERSION_1_4 0x00010004
#define JNI_VERSION_1_6 0x00010006

#define JNI_OK          (0)         /* no error */
#define JNI_ERR         (-1)        /* generic error */
#define JNI_EDETACHED   (-2)        /* thread detached from the VM */
#define JNI_EVERSION    (-3)        /* JNI version error */

#define JNI_COMMIT      1           /* copy content, do not free buffer */
#define JNI_ABORT       2           /* free buffer w/o copying back */

#endif  /* JNI_H_ */






Deleted jni/sqlite3.c.



more than 10,000 changes


Deleted jni/sqlite3.h.





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/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the SQLite library
** presents to client programs.  If a C-function, structure, datatype,
** or constant definition does not appear in this file, then it is
** not a published API of SQLite, is subject to change without
** notice, and should not be referenced by programs that use SQLite.
**
** Some of the definitions that are in this file are marked as
** "experimental".  Experimental interfaces are normally new
** features recently added to SQLite.  We do not anticipate changes
** to experimental interfaces but reserve the right to make minor changes
** if experience from use "in the wild" suggest such changes are prudent.
**
** The official C-language API documentation for SQLite is derived
** from comments in this file.  This file is the authoritative source
** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.
*/
#ifdef __cplusplus
extern "C" {
#endif


/*
** Add the ability to override 'extern'
*/
#ifndef SQLITE_EXTERN
# define SQLITE_EXTERN extern
#endif

#ifndef SQLITE_API
# define SQLITE_API
#endif


/*
** These no-op macros are used in front of interfaces to mark those
** interfaces as either deprecated or experimental.  New applications
** should not use deprecated interfaces - they are support for backwards
** compatibility only.  Application writers should be aware that
** experimental interfaces are subject to change in point releases.
**
** These macros used to resolve to various kinds of compiler magic that
** would generate warning messages when they were used.  But that
** compiler magic ended up generating such a flurry of bug reports
** that we have taken it all out and gone back to using simple
** noop macros.
*/
#define SQLITE_DEPRECATED
#define SQLITE_EXPERIMENTAL

/*
** Ensure these symbols were not defined by some previous header file.
*/
#ifdef SQLITE_VERSION
# undef SQLITE_VERSION
#endif
#ifdef SQLITE_VERSION_NUMBER
# undef SQLITE_VERSION_NUMBER
#endif

/*
** CAPI3REF: Compile-Time Library Version Numbers
**
** ^(The [SQLITE_VERSION] C preprocessor macro in the sqlite3.h header
** evaluates to a string literal that is the SQLite version in the
** format "X.Y.Z" where X is the major version number (always 3 for
** SQLite3) and Y is the minor version number and Z is the release number.)^
** ^(The [SQLITE_VERSION_NUMBER] C preprocessor macro resolves to an integer
** with the value (X*1000000 + Y*1000 + Z) where X, Y, and Z are the same
** numbers used in [SQLITE_VERSION].)^
** The SQLITE_VERSION_NUMBER for any given release of SQLite will also
** be larger than the release from which it is derived.  Either Y will
** be held constant and Z will be incremented or else Y will be incremented
** and Z will be reset to zero.
**
** Since version 3.6.18, SQLite source code has been stored in the
** <a href="http://www.fossil-scm.org/">Fossil configuration management
** system</a>.  ^The SQLITE_SOURCE_ID macro evaluates to
** a string which identifies a particular check-in of SQLite
** within its configuration management system.  ^The SQLITE_SOURCE_ID
** string contains the date and time of the check-in (UTC) and an SHA1
** hash of the entire source tree.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.8.3"
#define SQLITE_VERSION_NUMBER 3008003
#define SQLITE_SOURCE_ID      "2013-12-17 16:32:56 93121d3097a43997af3c0de65bd9bd7663845fa2"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version, sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
** but are associated with the library instead of the header file.  ^(Cautious
** programmers might include assert() statements in their application to
** verify that values returned by these interfaces match the macros in
** the header, and thus insure that the application is
** compiled with matching library and header files.
**
** <blockquote><pre>
** assert( sqlite3_libversion_number()==SQLITE_VERSION_NUMBER );
** assert( strcmp(sqlite3_sourceid(),SQLITE_SOURCE_ID)==0 );
** assert( strcmp(sqlite3_libversion(),SQLITE_VERSION)==0 );
** </pre></blockquote>)^
**
** ^The sqlite3_version[] string constant contains the text of [SQLITE_VERSION]
** macro.  ^The sqlite3_libversion() function returns a pointer to the
** to the sqlite3_version[] string constant.  The sqlite3_libversion()
** function is provided for use in DLLs since DLL users usually do not have
** direct access to string constants within the DLL.  ^The
** sqlite3_libversion_number() function returns an integer equal to
** [SQLITE_VERSION_NUMBER].  ^The sqlite3_sourceid() function returns 
** a pointer to a string constant whose value is the same as the 
** [SQLITE_SOURCE_ID] C preprocessor macro.
**
** See also: [sqlite_version()] and [sqlite_source_id()].
*/
SQLITE_API SQLITE_EXTERN const char sqlite3_version[];
SQLITE_API const char *sqlite3_libversion(void);
SQLITE_API const char *sqlite3_sourceid(void);
SQLITE_API int sqlite3_libversion_number(void);

/*
** CAPI3REF: Run-Time Library Compilation Options Diagnostics
**
** ^The sqlite3_compileoption_used() function returns 0 or 1 
** indicating whether the specified option was defined at 
** compile time.  ^The SQLITE_ prefix may be omitted from the 
** option name passed to sqlite3_compileoption_used().  
**
** ^The sqlite3_compileoption_get() function allows iterating
** over the list of options that were defined at compile time by
** returning the N-th compile time option string.  ^If N is out of range,
** sqlite3_compileoption_get() returns a NULL pointer.  ^The SQLITE_ 
** prefix is omitted from any strings returned by 
** sqlite3_compileoption_get().
**
** ^Support for the diagnostic functions sqlite3_compileoption_used()
** and sqlite3_compileoption_get() may be omitted by specifying the 
** [SQLITE_OMIT_COMPILEOPTION_DIAGS] option at compile time.
**
** See also: SQL functions [sqlite_compileoption_used()] and
** [sqlite_compileoption_get()] and the [compile_options pragma].
*/
#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
SQLITE_API int sqlite3_compileoption_used(const char *zOptName);
SQLITE_API const char *sqlite3_compileoption_get(int N);
#endif

/*
** CAPI3REF: Test To See If The Library Is Threadsafe
**
** ^The sqlite3_threadsafe() function returns zero if and only if
** SQLite was compiled with mutexing code omitted due to the
** [SQLITE_THREADSAFE] compile-time option being set to 0.
**
** SQLite can be compiled with or without mutexes.  When
** the [SQLITE_THREADSAFE] C preprocessor macro is 1 or 2, mutexes
** are enabled and SQLite is threadsafe.  When the
** [SQLITE_THREADSAFE] macro is 0, 
** the mutexes are omitted.  Without the mutexes, it is not safe
** to use SQLite concurrently from more than one thread.
**
** Enabling mutexes incurs a measurable performance penalty.
** So if speed is of utmost importance, it makes sense to disable
** the mutexes.  But for maximum safety, mutexes should be enabled.
** ^The default behavior is for mutexes to be enabled.
**
** This interface can be used by an application to make sure that the
** version of SQLite that it is linking against was compiled with
** the desired setting of the [SQLITE_THREADSAFE] macro.
**
** This interface only reports on the compile-time mutex setting
** of the [SQLITE_THREADSAFE] flag.  If SQLite is compiled with
** SQLITE_THREADSAFE=1 or =2 then mutexes are enabled by default but
** can be fully or partially disabled using a call to [sqlite3_config()]
** with the verbs [SQLITE_CONFIG_SINGLETHREAD], [SQLITE_CONFIG_MULTITHREAD],
** or [SQLITE_CONFIG_MUTEX].  ^(The return value of the
** sqlite3_threadsafe() function shows only the compile-time setting of
** thread safety, not any run-time changes to that setting made by
** sqlite3_config(). In other words, the return value from sqlite3_threadsafe()
** is unchanged by calls to sqlite3_config().)^
**
** See the [threading mode] documentation for additional information.
*/
SQLITE_API int sqlite3_threadsafe(void);

/*
** CAPI3REF: Database Connection Handle
** KEYWORDS: {database connection} {database connections}
**
** Each open SQLite database is represented by a pointer to an instance of
** the opaque structure named "sqlite3".  It is useful to think of an sqlite3
** pointer as an object.  The [sqlite3_open()], [sqlite3_open16()], and
** [sqlite3_open_v2()] interfaces are its constructors, and [sqlite3_close()]
** and [sqlite3_close_v2()] are its destructors.  There are many other
** interfaces (such as
** [sqlite3_prepare_v2()], [sqlite3_create_function()], and
** [sqlite3_busy_timeout()] to name but three) that are methods on an
** sqlite3 object.
*/
typedef struct sqlite3 sqlite3;

/*
** CAPI3REF: 64-Bit Integer Types
** KEYWORDS: sqlite_int64 sqlite_uint64
**
** Because there is no cross-platform way to specify 64-bit integer types
** SQLite includes typedefs for 64-bit signed and unsigned integers.
**
** The sqlite3_int64 and sqlite3_uint64 are the preferred type definitions.
** The sqlite_int64 and sqlite_uint64 types are supported for backwards
** compatibility only.
**
** ^The sqlite3_int64 and sqlite_int64 types can store integer values
** between -9223372036854775808 and +9223372036854775807 inclusive.  ^The
** sqlite3_uint64 and sqlite_uint64 types can store integer values 
** between 0 and +18446744073709551615 inclusive.
*/
#ifdef SQLITE_INT64_TYPE
  typedef SQLITE_INT64_TYPE sqlite_int64;
  typedef unsigned SQLITE_INT64_TYPE sqlite_uint64;
#elif defined(_MSC_VER) || defined(__BORLANDC__)
  typedef __int64 sqlite_int64;
  typedef unsigned __int64 sqlite_uint64;
#else
  typedef long long int sqlite_int64;
  typedef unsigned long long int sqlite_uint64;
#endif
typedef sqlite_int64 sqlite3_int64;
typedef sqlite_uint64 sqlite3_uint64;

/*
** If compiling for a processor that lacks floating point support,
** substitute integer for floating-point.
*/
#ifdef SQLITE_OMIT_FLOATING_POINT
# define double sqlite3_int64
#endif

/*
** CAPI3REF: Closing A Database Connection
**
** ^The sqlite3_close() and sqlite3_close_v2() routines are destructors
** for the [sqlite3] object.
** ^Calls to sqlite3_close() and sqlite3_close_v2() return SQLITE_OK if
** the [sqlite3] object is successfully destroyed and all associated
** resources are deallocated.
**
** ^If the database connection is associated with unfinalized prepared
** statements or unfinished sqlite3_backup objects then sqlite3_close()
** will leave the database connection open and return [SQLITE_BUSY].
** ^If sqlite3_close_v2() is called with unfinalized prepared statements
** and unfinished sqlite3_backups, then the database connection becomes
** an unusable "zombie" which will automatically be deallocated when the
** last prepared statement is finalized or the last sqlite3_backup is
** finished.  The sqlite3_close_v2() interface is intended for use with
** host languages that are garbage collected, and where the order in which
** destructors are called is arbitrary.
**
** Applications should [sqlite3_finalize | finalize] all [prepared statements],
** [sqlite3_blob_close | close] all [BLOB handles], and 
** [sqlite3_backup_finish | finish] all [sqlite3_backup] objects associated
** with the [sqlite3] object prior to attempting to close the object.  ^If
** sqlite3_close_v2() is called on a [database connection] that still has
** outstanding [prepared statements], [BLOB handles], and/or
** [sqlite3_backup] objects then it returns SQLITE_OK but the deallocation
** of resources is deferred until all [prepared statements], [BLOB handles],
** and [sqlite3_backup] objects are also destroyed.
**
** ^If an [sqlite3] object is destroyed while a transaction is open,
** the transaction is automatically rolled back.
**
** The C parameter to [sqlite3_close(C)] and [sqlite3_close_v2(C)]
** must be either a NULL
** pointer or an [sqlite3] object pointer obtained
** from [sqlite3_open()], [sqlite3_open16()], or
** [sqlite3_open_v2()], and not previously closed.
** ^Calling sqlite3_close() or sqlite3_close_v2() with a NULL pointer
** argument is a harmless no-op.
*/
SQLITE_API int sqlite3_close(sqlite3*);
SQLITE_API int sqlite3_close_v2(sqlite3*);

/*
** The type for a callback function.
** This is legacy and deprecated.  It is included for historical
** compatibility and is not documented.
*/
typedef int (*sqlite3_callback)(void*,int,char**, char**);

/*
** CAPI3REF: One-Step Query Execution Interface
**
** The sqlite3_exec() interface is a convenience wrapper around
** [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()],
** that allows an application to run multiple statements of SQL
** without having to use a lot of C code. 
**
** ^The sqlite3_exec() interface runs zero or more UTF-8 encoded,
** semicolon-separate SQL statements passed into its 2nd argument,
** in the context of the [database connection] passed in as its 1st
** argument.  ^If the callback function of the 3rd argument to
** sqlite3_exec() is not NULL, then it is invoked for each result row
** coming out of the evaluated SQL statements.  ^The 4th argument to
** sqlite3_exec() is relayed through to the 1st argument of each
** callback invocation.  ^If the callback pointer to sqlite3_exec()
** is NULL, then no callback is ever invoked and result rows are
** ignored.
**
** ^If an error occurs while evaluating the SQL statements passed into
** sqlite3_exec(), then execution of the current statement stops and
** subsequent statements are skipped.  ^If the 5th parameter to sqlite3_exec()
** is not NULL then any error message is written into memory obtained
** from [sqlite3_malloc()] and passed back through the 5th parameter.
** To avoid memory leaks, the application should invoke [sqlite3_free()]
** on error message strings returned through the 5th parameter of
** of sqlite3_exec() after the error message string is no longer needed.
** ^If the 5th parameter to sqlite3_exec() is not NULL and no errors
** occur, then sqlite3_exec() sets the pointer in its 5th parameter to
** NULL before returning.
**
** ^If an sqlite3_exec() callback returns non-zero, the sqlite3_exec()
** routine returns SQLITE_ABORT without invoking the callback again and
** without running any subsequent SQL statements.
**
** ^The 2nd argument to the sqlite3_exec() callback function is the
** number of columns in the result.  ^The 3rd argument to the sqlite3_exec()
** callback is an array of pointers to strings obtained as if from
** [sqlite3_column_text()], one for each column.  ^If an element of a
** result row is NULL then the corresponding string pointer for the
** sqlite3_exec() callback is a NULL pointer.  ^The 4th argument to the
** sqlite3_exec() callback is an array of pointers to strings where each
** entry represents the name of corresponding result column as obtained
** from [sqlite3_column_name()].
**
** ^If the 2nd parameter to sqlite3_exec() is a NULL pointer, a pointer
** to an empty string, or a pointer that contains only whitespace and/or 
** SQL comments, then no SQL statements are evaluated and the database
** is not changed.
**
** Restrictions:
**
** <ul>
** <li> The application must insure that the 1st parameter to sqlite3_exec()
**      is a valid and open [database connection].
** <li> The application must not close the [database connection] specified by
**      the 1st parameter to sqlite3_exec() while sqlite3_exec() is running.
** <li> The application must not modify the SQL statement text passed into
**      the 2nd parameter of sqlite3_exec() while sqlite3_exec() is running.
** </ul>
*/
SQLITE_API int sqlite3_exec(
  sqlite3*,                                  /* An open database */
  const char *sql,                           /* SQL to be evaluated */
  int (*callback)(void*,int,char**,char**),  /* Callback function */
  void *,                                    /* 1st argument to callback */
  char **errmsg                              /* Error msg written here */
);

/*
** CAPI3REF: Result Codes
** KEYWORDS: SQLITE_OK {error code} {error codes}
** KEYWORDS: {result code} {result codes}
**
** Many SQLite functions return an integer result code from the set shown
** here in order to indicate success or failure.
**
** New error codes may be added in future versions of SQLite.
**
** See also: [SQLITE_IOERR_READ | extended result codes],
** [sqlite3_vtab_on_conflict()] [SQLITE_ROLLBACK | result codes].
*/
#define SQLITE_OK           0   /* Successful result */
/* beginning-of-error-codes */
#define SQLITE_ERROR        1   /* SQL error or missing database */
#define SQLITE_INTERNAL     2   /* Internal logic error in SQLite */
#define SQLITE_PERM         3   /* Access permission denied */
#define SQLITE_ABORT        4   /* Callback routine requested an abort */
#define SQLITE_BUSY         5   /* The database file is locked */
#define SQLITE_LOCKED       6   /* A table in the database is locked */
#define SQLITE_NOMEM        7   /* A malloc() failed */
#define SQLITE_READONLY     8   /* Attempt to write a readonly database */
#define SQLITE_INTERRUPT    9   /* Operation terminated by sqlite3_interrupt()*/
#define SQLITE_IOERR       10   /* Some kind of disk I/O error occurred */
#define SQLITE_CORRUPT     11   /* The database disk image is malformed */
#define SQLITE_NOTFOUND    12   /* Unknown opcode in sqlite3_file_control() */
#define SQLITE_FULL        13   /* Insertion failed because database is full */
#define SQLITE_CANTOPEN    14   /* Unable to open the database file */
#define SQLITE_PROTOCOL    15   /* Database lock protocol error */
#define SQLITE_EMPTY       16   /* Database is empty */
#define SQLITE_SCHEMA      17   /* The database schema changed */
#define SQLITE_TOOBIG      18   /* String or BLOB exceeds size limit */
#define SQLITE_CONSTRAINT  19   /* Abort due to constraint violation */
#define SQLITE_MISMATCH    20   /* Data type mismatch */
#define SQLITE_MISUSE      21   /* Library used incorrectly */
#define SQLITE_NOLFS       22   /* Uses OS features not supported on host */
#define SQLITE_AUTH        23   /* Authorization denied */
#define SQLITE_FORMAT      24   /* Auxiliary database format error */
#define SQLITE_RANGE       25   /* 2nd parameter to sqlite3_bind out of range */
#define SQLITE_NOTADB      26   /* File opened that is not a database file */
#define SQLITE_NOTICE      27   /* Notifications from sqlite3_log() */
#define SQLITE_WARNING     28   /* Warnings from sqlite3_log() */
#define SQLITE_ROW         100  /* sqlite3_step() has another row ready */
#define SQLITE_DONE        101  /* sqlite3_step() has finished executing */
/* end-of-error-codes */

/*
** CAPI3REF: Extended Result Codes
** KEYWORDS: {extended error code} {extended error codes}
** KEYWORDS: {extended result code} {extended result codes}
**
** In its default configuration, SQLite API routines return one of 26 integer
** [SQLITE_OK | result codes].  However, experience has shown that many of
** these result codes are too coarse-grained.  They do not provide as
** much information about problems as programmers might like.  In an effort to
** address this, newer versions of SQLite (version 3.3.8 and later) include
** support for additional result codes that provide more detailed information
** about errors. The extended result codes are enabled or disabled
** on a per database connection basis using the
** [sqlite3_extended_result_codes()] API.
**
** Some of the available extended result codes are listed here.
** One may expect the number of extended result codes will increase
** over time.  Software that uses extended result codes should expect
** to see new result codes in future releases of SQLite.
**
** The SQLITE_OK result code will never be extended.  It will always
** be exactly zero.
*/
#define SQLITE_IOERR_READ              (SQLITE_IOERR | (1<<8))
#define SQLITE_IOERR_SHORT_READ        (SQLITE_IOERR | (2<<8))
#define SQLITE_IOERR_WRITE             (SQLITE_IOERR | (3<<8))
#define SQLITE_IOERR_FSYNC             (SQLITE_IOERR | (4<<8))
#define SQLITE_IOERR_DIR_FSYNC         (SQLITE_IOERR | (5<<8))
#define SQLITE_IOERR_TRUNCATE          (SQLITE_IOERR | (6<<8))
#define SQLITE_IOERR_FSTAT             (SQLITE_IOERR | (7<<8))
#define SQLITE_IOERR_UNLOCK            (SQLITE_IOERR | (8<<8))
#define SQLITE_IOERR_RDLOCK            (SQLITE_IOERR | (9<<8))
#define SQLITE_IOERR_DELETE            (SQLITE_IOERR | (10<<8))
#define SQLITE_IOERR_BLOCKED           (SQLITE_IOERR | (11<<8))
#define SQLITE_IOERR_NOMEM             (SQLITE_IOERR | (12<<8))
#define SQLITE_IOERR_ACCESS            (SQLITE_IOERR | (13<<8))
#define SQLITE_IOERR_CHECKRESERVEDLOCK (SQLITE_IOERR | (14<<8))
#define SQLITE_IOERR_LOCK              (SQLITE_IOERR | (15<<8))
#define SQLITE_IOERR_CLOSE             (SQLITE_IOERR | (16<<8))
#define SQLITE_IOERR_DIR_CLOSE         (SQLITE_IOERR | (17<<8))
#define SQLITE_IOERR_SHMOPEN           (SQLITE_IOERR | (18<<8))
#define SQLITE_IOERR_SHMSIZE           (SQLITE_IOERR | (19<<8))
#define SQLITE_IOERR_SHMLOCK           (SQLITE_IOERR | (20<<8))
#define SQLITE_IOERR_SHMMAP            (SQLITE_IOERR | (21<<8))
#define SQLITE_IOERR_SEEK              (SQLITE_IOERR | (22<<8))
#define SQLITE_IOERR_DELETE_NOENT      (SQLITE_IOERR | (23<<8))
#define SQLITE_IOERR_MMAP              (SQLITE_IOERR | (24<<8))
#define SQLITE_IOERR_GETTEMPPATH       (SQLITE_IOERR | (25<<8))
#define SQLITE_IOERR_CONVPATH          (SQLITE_IOERR | (26<<8))
#define SQLITE_LOCKED_SHAREDCACHE      (SQLITE_LOCKED |  (1<<8))
#define SQLITE_BUSY_RECOVERY           (SQLITE_BUSY   |  (1<<8))
#define SQLITE_BUSY_SNAPSHOT           (SQLITE_BUSY   |  (2<<8))
#define SQLITE_CANTOPEN_NOTEMPDIR      (SQLITE_CANTOPEN | (1<<8))
#define SQLITE_CANTOPEN_ISDIR          (SQLITE_CANTOPEN | (2<<8))
#define SQLITE_CANTOPEN_FULLPATH       (SQLITE_CANTOPEN | (3<<8))
#define SQLITE_CANTOPEN_CONVPATH       (SQLITE_CANTOPEN | (4<<8))
#define SQLITE_CORRUPT_VTAB            (SQLITE_CORRUPT | (1<<8))
#define SQLITE_READONLY_RECOVERY       (SQLITE_READONLY | (1<<8))
#define SQLITE_READONLY_CANTLOCK       (SQLITE_READONLY | (2<<8))
#define SQLITE_READONLY_ROLLBACK       (SQLITE_READONLY | (3<<8))
#define SQLITE_READONLY_DBMOVED        (SQLITE_READONLY | (4<<8))
#define SQLITE_ABORT_ROLLBACK          (SQLITE_ABORT | (2<<8))
#define SQLITE_CONSTRAINT_CHECK        (SQLITE_CONSTRAINT | (1<<8))
#define SQLITE_CONSTRAINT_COMMITHOOK   (SQLITE_CONSTRAINT | (2<<8))
#define SQLITE_CONSTRAINT_FOREIGNKEY   (SQLITE_CONSTRAINT | (3<<8))
#define SQLITE_CONSTRAINT_FUNCTION     (SQLITE_CONSTRAINT | (4<<8))
#define SQLITE_CONSTRAINT_NOTNULL      (SQLITE_CONSTRAINT | (5<<8))
#define SQLITE_CONSTRAINT_PRIMARYKEY   (SQLITE_CONSTRAINT | (6<<8))
#define SQLITE_CONSTRAINT_TRIGGER      (SQLITE_CONSTRAINT | (7<<8))
#define SQLITE_CONSTRAINT_UNIQUE       (SQLITE_CONSTRAINT | (8<<8))
#define SQLITE_CONSTRAINT_VTAB         (SQLITE_CONSTRAINT | (9<<8))
#define SQLITE_CONSTRAINT_ROWID        (SQLITE_CONSTRAINT |(10<<8))
#define SQLITE_NOTICE_RECOVER_WAL      (SQLITE_NOTICE | (1<<8))
#define SQLITE_NOTICE_RECOVER_ROLLBACK (SQLITE_NOTICE | (2<<8))
#define SQLITE_WARNING_AUTOINDEX       (SQLITE_WARNING | (1<<8))

/*
** CAPI3REF: Flags For File Open Operations
**
** These bit values are intended for use in the
** 3rd parameter to the [sqlite3_open_v2()] interface and
** in the 4th parameter to the [sqlite3_vfs.xOpen] method.
*/
#define SQLITE_OPEN_READONLY         0x00000001  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_READWRITE        0x00000002  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_CREATE           0x00000004  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_DELETEONCLOSE    0x00000008  /* VFS only */
#define SQLITE_OPEN_EXCLUSIVE        0x00000010  /* VFS only */
#define SQLITE_OPEN_AUTOPROXY        0x00000020  /* VFS only */
#define SQLITE_OPEN_URI              0x00000040  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_MEMORY           0x00000080  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_MAIN_DB          0x00000100  /* VFS only */
#define SQLITE_OPEN_TEMP_DB          0x00000200  /* VFS only */
#define SQLITE_OPEN_TRANSIENT_DB     0x00000400  /* VFS only */
#define SQLITE_OPEN_MAIN_JOURNAL     0x00000800  /* VFS only */
#define SQLITE_OPEN_TEMP_JOURNAL     0x00001000  /* VFS only */
#define SQLITE_OPEN_SUBJOURNAL       0x00002000  /* VFS only */
#define SQLITE_OPEN_MASTER_JOURNAL   0x00004000  /* VFS only */
#define SQLITE_OPEN_NOMUTEX          0x00008000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_FULLMUTEX        0x00010000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_SHAREDCACHE      0x00020000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_PRIVATECACHE     0x00040000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_WAL              0x00080000  /* VFS only */

/* Reserved:                         0x00F00000 */

/*
** CAPI3REF: Device Characteristics
**
** The xDeviceCharacteristics method of the [sqlite3_io_methods]
** object returns an integer which is a vector of these
** bit values expressing I/O characteristics of the mass storage
** device that holds the file that the [sqlite3_io_methods]
** refers to.
**
** The SQLITE_IOCAP_ATOMIC property means that all writes of
** any size are atomic.  The SQLITE_IOCAP_ATOMICnnn values
** mean that writes of blocks that are nnn bytes in size and
** are aligned to an address which is an integer multiple of
** nnn are atomic.  The SQLITE_IOCAP_SAFE_APPEND value means
** that when data is appended to a file, the data is appended
** first then the size of the file is extended, never the other
** way around.  The SQLITE_IOCAP_SEQUENTIAL property means that
** information is written to disk in the same order as calls
** to xWrite().  The SQLITE_IOCAP_POWERSAFE_OVERWRITE property means that
** after reboot following a crash or power loss, the only bytes in a
** file that were written at the application level might have changed
** and that adjacent bytes, even bytes within the same sector are
** guaranteed to be unchanged.  The SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN
** flag indicate that a file cannot be deleted when open.
*/
#define SQLITE_IOCAP_ATOMIC                 0x00000001
#define SQLITE_IOCAP_ATOMIC512              0x00000002
#define SQLITE_IOCAP_ATOMIC1K               0x00000004
#define SQLITE_IOCAP_ATOMIC2K               0x00000008
#define SQLITE_IOCAP_ATOMIC4K               0x00000010
#define SQLITE_IOCAP_ATOMIC8K               0x00000020
#define SQLITE_IOCAP_ATOMIC16K              0x00000040
#define SQLITE_IOCAP_ATOMIC32K              0x00000080
#define SQLITE_IOCAP_ATOMIC64K              0x00000100
#define SQLITE_IOCAP_SAFE_APPEND            0x00000200
#define SQLITE_IOCAP_SEQUENTIAL             0x00000400
#define SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN  0x00000800
#define SQLITE_IOCAP_POWERSAFE_OVERWRITE    0x00001000

/*
** CAPI3REF: File Locking Levels
**
** SQLite uses one of these integer values as the second
** argument to calls it makes to the xLock() and xUnlock() methods
** of an [sqlite3_io_methods] object.
*/
#define SQLITE_LOCK_NONE          0
#define SQLITE_LOCK_SHARED        1
#define SQLITE_LOCK_RESERVED      2
#define SQLITE_LOCK_PENDING       3
#define SQLITE_LOCK_EXCLUSIVE     4

/*
** CAPI3REF: Synchronization Type Flags
**
** When SQLite invokes the xSync() method of an
** [sqlite3_io_methods] object it uses a combination of
** these integer values as the second argument.
**
** When the SQLITE_SYNC_DATAONLY flag is used, it means that the
** sync operation only needs to flush data to mass storage.  Inode
** information need not be flushed. If the lower four bits of the flag
** equal SQLITE_SYNC_NORMAL, that means to use normal fsync() semantics.
** If the lower four bits equal SQLITE_SYNC_FULL, that means
** to use Mac OS X style fullsync instead of fsync().
**
** Do not confuse the SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL flags
** with the [PRAGMA synchronous]=NORMAL and [PRAGMA synchronous]=FULL
** settings.  The [synchronous pragma] determines when calls to the
** xSync VFS method occur and applies uniformly across all platforms.
** The SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL flags determine how
** energetic or rigorous or forceful the sync operations are and
** only make a difference on Mac OSX for the default SQLite code.
** (Third-party VFS implementations might also make the distinction
** between SQLITE_SYNC_NORMAL and SQLITE_SYNC_FULL, but among the
** operating systems natively supported by SQLite, only Mac OSX
** cares about the difference.)
*/
#define SQLITE_SYNC_NORMAL        0x00002
#define SQLITE_SYNC_FULL          0x00003
#define SQLITE_SYNC_DATAONLY      0x00010

/*
** CAPI3REF: OS Interface Open File Handle
**
** An [sqlite3_file] object represents an open file in the 
** [sqlite3_vfs | OS interface layer].  Individual OS interface
** implementations will
** want to subclass this object by appending additional fields
** for their own use.  The pMethods entry is a pointer to an
** [sqlite3_io_methods] object that defines methods for performing
** I/O operations on the open file.
*/
typedef struct sqlite3_file sqlite3_file;
struct sqlite3_file {
  const struct sqlite3_io_methods *pMethods;  /* Methods for an open file */
};

/*
** CAPI3REF: OS Interface File Virtual Methods Object
**
** Every file opened by the [sqlite3_vfs.xOpen] method populates an
** [sqlite3_file] object (or, more commonly, a subclass of the
** [sqlite3_file] object) with a pointer to an instance of this object.
** This object defines the methods used to perform various operations
** against the open file represented by the [sqlite3_file] object.
**
** If the [sqlite3_vfs.xOpen] method sets the sqlite3_file.pMethods element 
** to a non-NULL pointer, then the sqlite3_io_methods.xClose method
** may be invoked even if the [sqlite3_vfs.xOpen] reported that it failed.  The
** only way to prevent a call to xClose following a failed [sqlite3_vfs.xOpen]
** is for the [sqlite3_vfs.xOpen] to set the sqlite3_file.pMethods element
** to NULL.
**
** The flags argument to xSync may be one of [SQLITE_SYNC_NORMAL] or
** [SQLITE_SYNC_FULL].  The first choice is the normal fsync().
** The second choice is a Mac OS X style fullsync.  The [SQLITE_SYNC_DATAONLY]
** flag may be ORed in to indicate that only the data of the file
** and not its inode needs to be synced.
**
** The integer values to xLock() and xUnlock() are one of
** <ul>
** <li> [SQLITE_LOCK_NONE],
** <li> [SQLITE_LOCK_SHARED],
** <li> [SQLITE_LOCK_RESERVED],
** <li> [SQLITE_LOCK_PENDING], or
** <li> [SQLITE_LOCK_EXCLUSIVE].
** </ul>
** xLock() increases the lock. xUnlock() decreases the lock.
** The xCheckReservedLock() method checks whether any database connection,
** either in this process or in some other process, is holding a RESERVED,
** PENDING, or EXCLUSIVE lock on the file.  It returns true
** if such a lock exists and false otherwise.
**
** The xFileControl() method is a generic interface that allows custom
** VFS implementations to directly control an open file using the
** [sqlite3_file_control()] interface.  The second "op" argument is an
** integer opcode.  The third argument is a generic pointer intended to
** point to a structure that may contain arguments or space in which to
** write return values.  Potential uses for xFileControl() might be
** functions to enable blocking locks with timeouts, to change the
** locking strategy (for example to use dot-file locks), to inquire
** about the status of a lock, or to break stale locks.  The SQLite
** core reserves all opcodes less than 100 for its own use.
** A [SQLITE_FCNTL_LOCKSTATE | list of opcodes] less than 100 is available.
** Applications that define a custom xFileControl method should use opcodes
** greater than 100 to avoid conflicts.  VFS implementations should
** return [SQLITE_NOTFOUND] for file control opcodes that they do not
** recognize.
**
** The xSectorSize() method returns the sector size of the
** device that underlies the file.  The sector size is the
** minimum write that can be performed without disturbing
** other bytes in the file.  The xDeviceCharacteristics()
** method returns a bit vector describing behaviors of the
** underlying device:
**
** <ul>
** <li> [SQLITE_IOCAP_ATOMIC]
** <li> [SQLITE_IOCAP_ATOMIC512]
** <li> [SQLITE_IOCAP_ATOMIC1K]
** <li> [SQLITE_IOCAP_ATOMIC2K]
** <li> [SQLITE_IOCAP_ATOMIC4K]
** <li> [SQLITE_IOCAP_ATOMIC8K]
** <li> [SQLITE_IOCAP_ATOMIC16K]
** <li> [SQLITE_IOCAP_ATOMIC32K]
** <li> [SQLITE_IOCAP_ATOMIC64K]
** <li> [SQLITE_IOCAP_SAFE_APPEND]
** <li> [SQLITE_IOCAP_SEQUENTIAL]
** </ul>
**
** The SQLITE_IOCAP_ATOMIC property means that all writes of
** any size are atomic.  The SQLITE_IOCAP_ATOMICnnn values
** mean that writes of blocks that are nnn bytes in size and
** are aligned to an address which is an integer multiple of
** nnn are atomic.  The SQLITE_IOCAP_SAFE_APPEND value means
** that when data is appended to a file, the data is appended
** first then the size of the file is extended, never the other
** way around.  The SQLITE_IOCAP_SEQUENTIAL property means that
** information is written to disk in the same order as calls
** to xWrite().
**
** If xRead() returns SQLITE_IOERR_SHORT_READ it must also fill
** in the unread portions of the buffer with zeros.  A VFS that
** fails to zero-fill short reads might seem to work.  However,
** failure to zero-fill short reads will eventually lead to
** database corruption.
*/
typedef struct sqlite3_io_methods sqlite3_io_methods;
struct sqlite3_io_methods {
  int iVersion;
  int (*xClose)(sqlite3_file*);
  int (*xRead)(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst);
  int (*xWrite)(sqlite3_file*, const void*, int iAmt, sqlite3_int64 iOfst);
  int (*xTruncate)(sqlite3_file*, sqlite3_int64 size);
  int (*xSync)(sqlite3_file*, int flags);
  int (*xFileSize)(sqlite3_file*, sqlite3_int64 *pSize);
  int (*xLock)(sqlite3_file*, int);
  int (*xUnlock)(sqlite3_file*, int);
  int (*xCheckReservedLock)(sqlite3_file*, int *pResOut);
  int (*xFileControl)(sqlite3_file*, int op, void *pArg);
  int (*xSectorSize)(sqlite3_file*);
  int (*xDeviceCharacteristics)(sqlite3_file*);
  /* Methods above are valid for version 1 */
  int (*xShmMap)(sqlite3_file*, int iPg, int pgsz, int, void volatile**);
  int (*xShmLock)(sqlite3_file*, int offset, int n, int flags);
  void (*xShmBarrier)(sqlite3_file*);
  int (*xShmUnmap)(sqlite3_file*, int deleteFlag);
  /* Methods above are valid for version 2 */
  int (*xFetch)(sqlite3_file*, sqlite3_int64 iOfst, int iAmt, void **pp);
  int (*xUnfetch)(sqlite3_file*, sqlite3_int64 iOfst, void *p);
  /* Methods above are valid for version 3 */
  /* Additional methods may be added in future releases */
};

/*
** CAPI3REF: Standard File Control Opcodes
**
** These integer constants are opcodes for the xFileControl method
** of the [sqlite3_io_methods] object and for the [sqlite3_file_control()]
** interface.
**
** The [SQLITE_FCNTL_LOCKSTATE] opcode is used for debugging.  This
** opcode causes the xFileControl method to write the current state of
** the lock (one of [SQLITE_LOCK_NONE], [SQLITE_LOCK_SHARED],
** [SQLITE_LOCK_RESERVED], [SQLITE_LOCK_PENDING], or [SQLITE_LOCK_EXCLUSIVE])
** into an integer that the pArg argument points to. This capability
** is used during testing and only needs to be supported when SQLITE_TEST
** is defined.
** <ul>
** <li>[[SQLITE_FCNTL_SIZE_HINT]]
** The [SQLITE_FCNTL_SIZE_HINT] opcode is used by SQLite to give the VFS
** layer a hint of how large the database file will grow to be during the
** current transaction.  This hint is not guaranteed to be accurate but it
** is often close.  The underlying VFS might choose to preallocate database
** file space based on this hint in order to help writes to the database
** file run faster.
**
** <li>[[SQLITE_FCNTL_CHUNK_SIZE]]
** The [SQLITE_FCNTL_CHUNK_SIZE] opcode is used to request that the VFS
** extends and truncates the database file in chunks of a size specified
** by the user. The fourth argument to [sqlite3_file_control()] should 
** point to an integer (type int) containing the new chunk-size to use
** for the nominated database. Allocating database file space in large
** chunks (say 1MB at a time), may reduce file-system fragmentation and
** improve performance on some systems.
**
** <li>[[SQLITE_FCNTL_FILE_POINTER]]
** The [SQLITE_FCNTL_FILE_POINTER] opcode is used to obtain a pointer
** to the [sqlite3_file] object associated with a particular database
** connection.  See the [sqlite3_file_control()] documentation for
** additional information.
**
** <li>[[SQLITE_FCNTL_SYNC_OMITTED]]
** No longer in use.
**
** <li>[[SQLITE_FCNTL_SYNC]]
** The [SQLITE_FCNTL_SYNC] opcode is generated internally by SQLite and
** sent to the VFS immediately before the xSync method is invoked on a
** database file descriptor. Or, if the xSync method is not invoked 
** because the user has configured SQLite with 
** [PRAGMA synchronous | PRAGMA synchronous=OFF] it is invoked in place 
** of the xSync method. In most cases, the pointer argument passed with
** this file-control is NULL. However, if the database file is being synced
** as part of a multi-database commit, the argument points to a nul-terminated
** string containing the transactions master-journal file name. VFSes that 
** do not need this signal should silently ignore this opcode. Applications 
** should not call [sqlite3_file_control()] with this opcode as doing so may 
** disrupt the operation of the specialized VFSes that do require it.  
**
** <li>[[SQLITE_FCNTL_COMMIT_PHASETWO]]
** The [SQLITE_FCNTL_COMMIT_PHASETWO] opcode is generated internally by SQLite
** and sent to the VFS after a transaction has been committed immediately
** but before the database is unlocked. VFSes that do not need this signal
** should silently ignore this opcode. Applications should not call
** [sqlite3_file_control()] with this opcode as doing so may disrupt the 
** operation of the specialized VFSes that do require it.  
**
** <li>[[SQLITE_FCNTL_WIN32_AV_RETRY]]
** ^The [SQLITE_FCNTL_WIN32_AV_RETRY] opcode is used to configure automatic
** retry counts and intervals for certain disk I/O operations for the
** windows [VFS] in order to provide robustness in the presence of
** anti-virus programs.  By default, the windows VFS will retry file read,
** file write, and file delete operations up to 10 times, with a delay
** of 25 milliseconds before the first retry and with the delay increasing
** by an additional 25 milliseconds with each subsequent retry.  This
** opcode allows these two values (10 retries and 25 milliseconds of delay)
** to be adjusted.  The values are changed for all database connections
** within the same process.  The argument is a pointer to an array of two
** integers where the first integer i the new retry count and the second
** integer is the delay.  If either integer is negative, then the setting
** is not changed but instead the prior value of that setting is written
** into the array entry, allowing the current retry settings to be
** interrogated.  The zDbName parameter is ignored.
**
** <li>[[SQLITE_FCNTL_PERSIST_WAL]]
** ^The [SQLITE_FCNTL_PERSIST_WAL] opcode is used to set or query the
** persistent [WAL | Write Ahead Log] setting.  By default, the auxiliary
** write ahead log and shared memory files used for transaction control
** are automatically deleted when the latest connection to the database
** closes.  Setting persistent WAL mode causes those files to persist after
** close.  Persisting the files is useful when other processes that do not
** have write permission on the directory containing the database file want
** to read the database file, as the WAL and shared memory files must exist
** in order for the database to be readable.  The fourth parameter to
** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
** That integer is 0 to disable persistent WAL mode or 1 to enable persistent
** WAL mode.  If the integer is -1, then it is overwritten with the current
** WAL persistence setting.
**
** <li>[[SQLITE_FCNTL_POWERSAFE_OVERWRITE]]
** ^The [SQLITE_FCNTL_POWERSAFE_OVERWRITE] opcode is used to set or query the
** persistent "powersafe-overwrite" or "PSOW" setting.  The PSOW setting
** determines the [SQLITE_IOCAP_POWERSAFE_OVERWRITE] bit of the
** xDeviceCharacteristics methods. The fourth parameter to
** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
** That integer is 0 to disable zero-damage mode or 1 to enable zero-damage
** mode.  If the integer is -1, then it is overwritten with the current
** zero-damage mode setting.
**
** <li>[[SQLITE_FCNTL_OVERWRITE]]
** ^The [SQLITE_FCNTL_OVERWRITE] opcode is invoked by SQLite after opening
** a write transaction to indicate that, unless it is rolled back for some
** reason, the entire database file will be overwritten by the current 
** transaction. This is used by VACUUM operations.
**
** <li>[[SQLITE_FCNTL_VFSNAME]]
** ^The [SQLITE_FCNTL_VFSNAME] opcode can be used to obtain the names of
** all [VFSes] in the VFS stack.  The names are of all VFS shims and the
** final bottom-level VFS are written into memory obtained from 
** [sqlite3_malloc()] and the result is stored in the char* variable
** that the fourth parameter of [sqlite3_file_control()] points to.
** The caller is responsible for freeing the memory when done.  As with
** all file-control actions, there is no guarantee that this will actually
** do anything.  Callers should initialize the char* variable to a NULL
** pointer in case this file-control is not implemented.  This file-control
** is intended for diagnostic use only.
**
** <li>[[SQLITE_FCNTL_PRAGMA]]
** ^Whenever a [PRAGMA] statement is parsed, an [SQLITE_FCNTL_PRAGMA] 
** file control is sent to the open [sqlite3_file] object corresponding
** to the database file to which the pragma statement refers. ^The argument
** to the [SQLITE_FCNTL_PRAGMA] file control is an array of
** pointers to strings (char**) in which the second element of the array
** is the name of the pragma and the third element is the argument to the
** pragma or NULL if the pragma has no argument.  ^The handler for an
** [SQLITE_FCNTL_PRAGMA] file control can optionally make the first element
** of the char** argument point to a string obtained from [sqlite3_mprintf()]
** or the equivalent and that string will become the result of the pragma or
** the error message if the pragma fails. ^If the
** [SQLITE_FCNTL_PRAGMA] file control returns [SQLITE_NOTFOUND], then normal 
** [PRAGMA] processing continues.  ^If the [SQLITE_FCNTL_PRAGMA]
** file control returns [SQLITE_OK], then the parser assumes that the
** VFS has handled the PRAGMA itself and the parser generates a no-op
** prepared statement.  ^If the [SQLITE_FCNTL_PRAGMA] file control returns
** any result code other than [SQLITE_OK] or [SQLITE_NOTFOUND], that means
** that the VFS encountered an error while handling the [PRAGMA] and the
** compilation of the PRAGMA fails with an error.  ^The [SQLITE_FCNTL_PRAGMA]
** file control occurs at the beginning of pragma statement analysis and so
** it is able to override built-in [PRAGMA] statements.
**
** <li>[[SQLITE_FCNTL_BUSYHANDLER]]
** ^The [SQLITE_FCNTL_BUSYHANDLER]
** file-control may be invoked by SQLite on the database file handle
** shortly after it is opened in order to provide a custom VFS with access
** to the connections busy-handler callback. The argument is of type (void **)
** - an array of two (void *) values. The first (void *) actually points
** to a function of type (int (*)(void *)). In order to invoke the connections
** busy-handler, this function should be invoked with the second (void *) in
** the array as the only argument. If it returns non-zero, then the operation
** should be retried. If it returns zero, the custom VFS should abandon the
** current operation.
**
** <li>[[SQLITE_FCNTL_TEMPFILENAME]]
** ^Application can invoke the [SQLITE_FCNTL_TEMPFILENAME] file-control
** to have SQLite generate a
** temporary filename using the same algorithm that is followed to generate
** temporary filenames for TEMP tables and other internal uses.  The
** argument should be a char** which will be filled with the filename
** written into memory obtained from [sqlite3_malloc()].  The caller should
** invoke [sqlite3_free()] on the result to avoid a memory leak.
**
** <li>[[SQLITE_FCNTL_MMAP_SIZE]]
** The [SQLITE_FCNTL_MMAP_SIZE] file control is used to query or set the
** maximum number of bytes that will be used for memory-mapped I/O.
** The argument is a pointer to a value of type sqlite3_int64 that
** is an advisory maximum number of bytes in the file to memory map.  The
** pointer is overwritten with the old value.  The limit is not changed if
** the value originally pointed to is negative, and so the current limit 
** can be queried by passing in a pointer to a negative number.  This
** file-control is used internally to implement [PRAGMA mmap_size].
**
** <li>[[SQLITE_FCNTL_TRACE]]
** The [SQLITE_FCNTL_TRACE] file control provides advisory information
** to the VFS about what the higher layers of the SQLite stack are doing.
** This file control is used by some VFS activity tracing [shims].
** The argument is a zero-terminated string.  Higher layers in the
** SQLite stack may generate instances of this file control if
** the [SQLITE_USE_FCNTL_TRACE] compile-time option is enabled.
**
** <li>[[SQLITE_FCNTL_HAS_MOVED]]
** The [SQLITE_FCNTL_HAS_MOVED] file control interprets its argument as a
** pointer to an integer and it writes a boolean into that integer depending
** on whether or not the file has been renamed, moved, or deleted since it
** was first opened.
**
** </ul>
*/
#define SQLITE_FCNTL_LOCKSTATE               1
#define SQLITE_GET_LOCKPROXYFILE             2
#define SQLITE_SET_LOCKPROXYFILE             3
#define SQLITE_LAST_ERRNO                    4
#define SQLITE_FCNTL_SIZE_HINT               5
#define SQLITE_FCNTL_CHUNK_SIZE              6
#define SQLITE_FCNTL_FILE_POINTER            7
#define SQLITE_FCNTL_SYNC_OMITTED            8
#define SQLITE_FCNTL_WIN32_AV_RETRY          9
#define SQLITE_FCNTL_PERSIST_WAL            10
#define SQLITE_FCNTL_OVERWRITE              11
#define SQLITE_FCNTL_VFSNAME                12
#define SQLITE_FCNTL_POWERSAFE_OVERWRITE    13
#define SQLITE_FCNTL_PRAGMA                 14
#define SQLITE_FCNTL_BUSYHANDLER            15
#define SQLITE_FCNTL_TEMPFILENAME           16
#define SQLITE_FCNTL_MMAP_SIZE              18
#define SQLITE_FCNTL_TRACE                  19
#define SQLITE_FCNTL_HAS_MOVED              20
#define SQLITE_FCNTL_SYNC                   21
#define SQLITE_FCNTL_COMMIT_PHASETWO        22

/*
** CAPI3REF: Mutex Handle
**
** The mutex module within SQLite defines [sqlite3_mutex] to be an
** abstract type for a mutex object.  The SQLite core never looks
** at the internal representation of an [sqlite3_mutex].  It only
** deals with pointers to the [sqlite3_mutex] object.
**
** Mutexes are created using [sqlite3_mutex_alloc()].
*/
typedef struct sqlite3_mutex sqlite3_mutex;

/*
** CAPI3REF: OS Interface Object
**
** An instance of the sqlite3_vfs object defines the interface between
** the SQLite core and the underlying operating system.  The "vfs"
** in the name of the object stands for "virtual file system".  See
** the [VFS | VFS documentation] for further information.
**
** The value of the iVersion field is initially 1 but may be larger in
** future versions of SQLite.  Additional fields may be appended to this
** object when the iVersion value is increased.  Note that the structure
** of the sqlite3_vfs object changes in the transaction between
** SQLite version 3.5.9 and 3.6.0 and yet the iVersion field was not
** modified.
**
** The szOsFile field is the size of the subclassed [sqlite3_file]
** structure used by this VFS.  mxPathname is the maximum length of
** a pathname in this VFS.
**
** Registered sqlite3_vfs objects are kept on a linked list formed by
** the pNext pointer.  The [sqlite3_vfs_register()]
** and [sqlite3_vfs_unregister()] interfaces manage this list
** in a thread-safe way.  The [sqlite3_vfs_find()] interface
** searches the list.  Neither the application code nor the VFS
** implementation should use the pNext pointer.
**
** The pNext field is the only field in the sqlite3_vfs
** structure that SQLite will ever modify.  SQLite will only access
** or modify this field while holding a particular static mutex.
** The application should never modify anything within the sqlite3_vfs
** object once the object has been registered.
**
** The zName field holds the name of the VFS module.  The name must
** be unique across all VFS modules.
**
** [[sqlite3_vfs.xOpen]]
** ^SQLite guarantees that the zFilename parameter to xOpen
** is either a NULL pointer or string obtained
** from xFullPathname() with an optional suffix added.
** ^If a suffix is added to the zFilename parameter, it will
** consist of a single "-" character followed by no more than
** 11 alphanumeric and/or "-" characters.
** ^SQLite further guarantees that
** the string will be valid and unchanged until xClose() is
** called. Because of the previous sentence,
** the [sqlite3_file] can safely store a pointer to the
** filename if it needs to remember the filename for some reason.
** If the zFilename parameter to xOpen is a NULL pointer then xOpen
** must invent its own temporary name for the file.  ^Whenever the 
** xFilename parameter is NULL it will also be the case that the
** flags parameter will include [SQLITE_OPEN_DELETEONCLOSE].
**
** The flags argument to xOpen() includes all bits set in
** the flags argument to [sqlite3_open_v2()].  Or if [sqlite3_open()]
** or [sqlite3_open16()] is used, then flags includes at least
** [SQLITE_OPEN_READWRITE] | [SQLITE_OPEN_CREATE]. 
** If xOpen() opens a file read-only then it sets *pOutFlags to
** include [SQLITE_OPEN_READONLY].  Other bits in *pOutFlags may be set.
**
** ^(SQLite will also add one of the following flags to the xOpen()
** call, depending on the object being opened:
**
** <ul>
** <li>  [SQLITE_OPEN_MAIN_DB]
** <li>  [SQLITE_OPEN_MAIN_JOURNAL]
** <li>  [SQLITE_OPEN_TEMP_DB]
** <li>  [SQLITE_OPEN_TEMP_JOURNAL]
** <li>  [SQLITE_OPEN_TRANSIENT_DB]
** <li>  [SQLITE_OPEN_SUBJOURNAL]
** <li>  [SQLITE_OPEN_MASTER_JOURNAL]
** <li>  [SQLITE_OPEN_WAL]
** </ul>)^
**
** The file I/O implementation can use the object type flags to
** change the way it deals with files.  For example, an application
** that does not care about crash recovery or rollback might make
** the open of a journal file a no-op.  Writes to this journal would
** also be no-ops, and any attempt to read the journal would return
** SQLITE_IOERR.  Or the implementation might recognize that a database
** file will be doing page-aligned sector reads and writes in a random
** order and set up its I/O subsystem accordingly.
**
** SQLite might also add one of the following flags to the xOpen method:
**
** <ul>
** <li> [SQLITE_OPEN_DELETEONCLOSE]
** <li> [SQLITE_OPEN_EXCLUSIVE]
** </ul>
**
** The [SQLITE_OPEN_DELETEONCLOSE] flag means the file should be
** deleted when it is closed.  ^The [SQLITE_OPEN_DELETEONCLOSE]
** will be set for TEMP databases and their journals, transient
** databases, and subjournals.
**
** ^The [SQLITE_OPEN_EXCLUSIVE] flag is always used in conjunction
** with the [SQLITE_OPEN_CREATE] flag, which are both directly
** analogous to the O_EXCL and O_CREAT flags of the POSIX open()
** API.  The SQLITE_OPEN_EXCLUSIVE flag, when paired with the 
** SQLITE_OPEN_CREATE, is used to indicate that file should always
** be created, and that it is an error if it already exists.
** It is <i>not</i> used to indicate the file should be opened 
** for exclusive access.
**
** ^At least szOsFile bytes of memory are allocated by SQLite
** to hold the  [sqlite3_file] structure passed as the third
** argument to xOpen.  The xOpen method does not have to
** allocate the structure; it should just fill it in.  Note that
** the xOpen method must set the sqlite3_file.pMethods to either
** a valid [sqlite3_io_methods] object or to NULL.  xOpen must do
** this even if the open fails.  SQLite expects that the sqlite3_file.pMethods
** element will be valid after xOpen returns regardless of the success
** or failure of the xOpen call.
**
** [[sqlite3_vfs.xAccess]]
** ^The flags argument to xAccess() may be [SQLITE_ACCESS_EXISTS]
** to test for the existence of a file, or [SQLITE_ACCESS_READWRITE] to
** test whether a file is readable and writable, or [SQLITE_ACCESS_READ]
** to test whether a file is at least readable.   The file can be a
** directory.
**
** ^SQLite will always allocate at least mxPathname+1 bytes for the
** output buffer xFullPathname.  The exact size of the output buffer
** is also passed as a parameter to both  methods. If the output buffer
** is not large enough, [SQLITE_CANTOPEN] should be returned. Since this is
** handled as a fatal error by SQLite, vfs implementations should endeavor
** to prevent this by setting mxPathname to a sufficiently large value.
**
** The xRandomness(), xSleep(), xCurrentTime(), and xCurrentTimeInt64()
** interfaces are not strictly a part of the filesystem, but they are
** included in the VFS structure for completeness.
** The xRandomness() function attempts to return nBytes bytes
** of good-quality randomness into zOut.  The return value is
** the actual number of bytes of randomness obtained.
** The xSleep() method causes the calling thread to sleep for at
** least the number of microseconds given.  ^The xCurrentTime()
** method returns a Julian Day Number for the current date and time as
** a floating point value.
** ^The xCurrentTimeInt64() method returns, as an integer, the Julian
** Day Number multiplied by 86400000 (the number of milliseconds in 
** a 24-hour day).  
** ^SQLite will use the xCurrentTimeInt64() method to get the current
** date and time if that method is available (if iVersion is 2 or 
** greater and the function pointer is not NULL) and will fall back
** to xCurrentTime() if xCurrentTimeInt64() is unavailable.
**
** ^The xSetSystemCall(), xGetSystemCall(), and xNestSystemCall() interfaces
** are not used by the SQLite core.  These optional interfaces are provided
** by some VFSes to facilitate testing of the VFS code. By overriding 
** system calls with functions under its control, a test program can
** simulate faults and error conditions that would otherwise be difficult
** or impossible to induce.  The set of system calls that can be overridden
** varies from one VFS to another, and from one version of the same VFS to the
** next.  Applications that use these interfaces must be prepared for any
** or all of these interfaces to be NULL or for their behavior to change
** from one release to the next.  Applications must not attempt to access
** any of these methods if the iVersion of the VFS is less than 3.
*/
typedef struct sqlite3_vfs sqlite3_vfs;
typedef void (*sqlite3_syscall_ptr)(void);
struct sqlite3_vfs {
  int iVersion;            /* Structure version number (currently 3) */
  int szOsFile;            /* Size of subclassed sqlite3_file */
  int mxPathname;          /* Maximum file pathname length */
  sqlite3_vfs *pNext;      /* Next registered VFS */
  const char *zName;       /* Name of this virtual file system */
  void *pAppData;          /* Pointer to application-specific data */
  int (*xOpen)(sqlite3_vfs*, const char *zName, sqlite3_file*,
               int flags, int *pOutFlags);
  int (*xDelete)(sqlite3_vfs*, const char *zName, int syncDir);
  int (*xAccess)(sqlite3_vfs*, const char *zName, int flags, int *pResOut);
  int (*xFullPathname)(sqlite3_vfs*, const char *zName, int nOut, char *zOut);
  void *(*xDlOpen)(sqlite3_vfs*, const char *zFilename);
  void (*xDlError)(sqlite3_vfs*, int nByte, char *zErrMsg);
  void (*(*xDlSym)(sqlite3_vfs*,void*, const char *zSymbol))(void);
  void (*xDlClose)(sqlite3_vfs*, void*);
  int (*xRandomness)(sqlite3_vfs*, int nByte, char *zOut);
  int (*xSleep)(sqlite3_vfs*, int microseconds);
  int (*xCurrentTime)(sqlite3_vfs*, double*);
  int (*xGetLastError)(sqlite3_vfs*, int, char *);
  /*
  ** The methods above are in version 1 of the sqlite_vfs object
  ** definition.  Those that follow are added in version 2 or later
  */
  int (*xCurrentTimeInt64)(sqlite3_vfs*, sqlite3_int64*);
  /*
  ** The methods above are in versions 1 and 2 of the sqlite_vfs object.
  ** Those below are for version 3 and greater.
  */
  int (*xSetSystemCall)(sqlite3_vfs*, const char *zName, sqlite3_syscall_ptr);
  sqlite3_syscall_ptr (*xGetSystemCall)(sqlite3_vfs*, const char *zName);
  const char *(*xNextSystemCall)(sqlite3_vfs*, const char *zName);
  /*
  ** The methods above are in versions 1 through 3 of the sqlite_vfs object.
  ** New fields may be appended in figure versions.  The iVersion
  ** value will increment whenever this happens. 
  */
};

/*
** CAPI3REF: Flags for the xAccess VFS method
**
** These integer constants can be used as the third parameter to
** the xAccess method of an [sqlite3_vfs] object.  They determine
** what kind of permissions the xAccess method is looking for.
** With SQLITE_ACCESS_EXISTS, the xAccess method
** simply checks whether the file exists.
** With SQLITE_ACCESS_READWRITE, the xAccess method
** checks whether the named directory is both readable and writable
** (in other words, if files can be added, removed, and renamed within
** the directory).
** The SQLITE_ACCESS_READWRITE constant is currently used only by the
** [temp_store_directory pragma], though this could change in a future
** release of SQLite.
** With SQLITE_ACCESS_READ, the xAccess method
** checks whether the file is readable.  The SQLITE_ACCESS_READ constant is
** currently unused, though it might be used in a future release of
** SQLite.
*/
#define SQLITE_ACCESS_EXISTS    0
#define SQLITE_ACCESS_READWRITE 1   /* Used by PRAGMA temp_store_directory */
#define SQLITE_ACCESS_READ      2   /* Unused */

/*
** CAPI3REF: Flags for the xShmLock VFS method
**
** These integer constants define the various locking operations
** allowed by the xShmLock method of [sqlite3_io_methods].  The
** following are the only legal combinations of flags to the
** xShmLock method:
**
** <ul>
** <li>  SQLITE_SHM_LOCK | SQLITE_SHM_SHARED
** <li>  SQLITE_SHM_LOCK | SQLITE_SHM_EXCLUSIVE
** <li>  SQLITE_SHM_UNLOCK | SQLITE_SHM_SHARED
** <li>  SQLITE_SHM_UNLOCK | SQLITE_SHM_EXCLUSIVE
** </ul>
**
** When unlocking, the same SHARED or EXCLUSIVE flag must be supplied as
** was given no the corresponding lock.  
**
** The xShmLock method can transition between unlocked and SHARED or
** between unlocked and EXCLUSIVE.  It cannot transition between SHARED
** and EXCLUSIVE.
*/
#define SQLITE_SHM_UNLOCK       1
#define SQLITE_SHM_LOCK         2
#define SQLITE_SHM_SHARED       4
#define SQLITE_SHM_EXCLUSIVE    8

/*
** CAPI3REF: Maximum xShmLock index
**
** The xShmLock method on [sqlite3_io_methods] may use values
** between 0 and this upper bound as its "offset" argument.
** The SQLite core will never attempt to acquire or release a
** lock outside of this range
*/
#define SQLITE_SHM_NLOCK        8


/*
** CAPI3REF: Initialize The SQLite Library
**
** ^The sqlite3_initialize() routine initializes the
** SQLite library.  ^The sqlite3_shutdown() routine
** deallocates any resources that were allocated by sqlite3_initialize().
** These routines are designed to aid in process initialization and
** shutdown on embedded systems.  Workstation applications using
** SQLite normally do not need to invoke either of these routines.
**
** A call to sqlite3_initialize() is an "effective" call if it is
** the first time sqlite3_initialize() is invoked during the lifetime of
** the process, or if it is the first time sqlite3_initialize() is invoked
** following a call to sqlite3_shutdown().  ^(Only an effective call
** of sqlite3_initialize() does any initialization.  All other calls
** are harmless no-ops.)^
**
** A call to sqlite3_shutdown() is an "effective" call if it is the first
** call to sqlite3_shutdown() since the last sqlite3_initialize().  ^(Only
** an effective call to sqlite3_shutdown() does any deinitialization.
** All other valid calls to sqlite3_shutdown() are harmless no-ops.)^
**
** The sqlite3_initialize() interface is threadsafe, but sqlite3_shutdown()
** is not.  The sqlite3_shutdown() interface must only be called from a
** single thread.  All open [database connections] must be closed and all
** other SQLite resources must be deallocated prior to invoking
** sqlite3_shutdown().
**
** Among other things, ^sqlite3_initialize() will invoke
** sqlite3_os_init().  Similarly, ^sqlite3_shutdown()
** will invoke sqlite3_os_end().
**
** ^The sqlite3_initialize() routine returns [SQLITE_OK] on success.
** ^If for some reason, sqlite3_initialize() is unable to initialize
** the library (perhaps it is unable to allocate a needed resource such
** as a mutex) it returns an [error code] other than [SQLITE_OK].
**
** ^The sqlite3_initialize() routine is called internally by many other
** SQLite interfaces so that an application usually does not need to
** invoke sqlite3_initialize() directly.  For example, [sqlite3_open()]
** calls sqlite3_initialize() so the SQLite library will be automatically
** initialized when [sqlite3_open()] is called if it has not be initialized
** already.  ^However, if SQLite is compiled with the [SQLITE_OMIT_AUTOINIT]
** compile-time option, then the automatic calls to sqlite3_initialize()
** are omitted and the application must call sqlite3_initialize() directly
** prior to using any other SQLite interface.  For maximum portability,
** it is recommended that applications always invoke sqlite3_initialize()
** directly prior to using any other SQLite interface.  Future releases
** of SQLite may require this.  In other words, the behavior exhibited
** when SQLite is compiled with [SQLITE_OMIT_AUTOINIT] might become the
** default behavior in some future release of SQLite.
**
** The sqlite3_os_init() routine does operating-system specific
** initialization of the SQLite library.  The sqlite3_os_end()
** routine undoes the effect of sqlite3_os_init().  Typical tasks
** performed by these routines include allocation or deallocation
** of static resources, initialization of global variables,
** setting up a default [sqlite3_vfs] module, or setting up
** a default configuration using [sqlite3_config()].
**
** The application should never invoke either sqlite3_os_init()
** or sqlite3_os_end() directly.  The application should only invoke
** sqlite3_initialize() and sqlite3_shutdown().  The sqlite3_os_init()
** interface is called automatically by sqlite3_initialize() and
** sqlite3_os_end() is called by sqlite3_shutdown().  Appropriate
** implementations for sqlite3_os_init() and sqlite3_os_end()
** are built into SQLite when it is compiled for Unix, Windows, or OS/2.
** When [custom builds | built for other platforms]
** (using the [SQLITE_OS_OTHER=1] compile-time
** option) the application must supply a suitable implementation for
** sqlite3_os_init() and sqlite3_os_end().  An application-supplied
** implementation of sqlite3_os_init() or sqlite3_os_end()
** must return [SQLITE_OK] on success and some other [error code] upon
** failure.
*/
SQLITE_API int sqlite3_initialize(void);
SQLITE_API int sqlite3_shutdown(void);
SQLITE_API int sqlite3_os_init(void);
SQLITE_API int sqlite3_os_end(void);

/*
** CAPI3REF: Configuring The SQLite Library
**
** The sqlite3_config() interface is used to make global configuration
** changes to SQLite in order to tune SQLite to the specific needs of
** the application.  The default configuration is recommended for most
** applications and so this routine is usually not necessary.  It is
** provided to support rare applications with unusual needs.
**
** The sqlite3_config() interface is not threadsafe.  The application
** must insure that no other SQLite interfaces are invoked by other
** threads while sqlite3_config() is running.  Furthermore, sqlite3_config()
** may only be invoked prior to library initialization using
** [sqlite3_initialize()] or after shutdown by [sqlite3_shutdown()].
** ^If sqlite3_config() is called after [sqlite3_initialize()] and before
** [sqlite3_shutdown()] then it will return SQLITE_MISUSE.
** Note, however, that ^sqlite3_config() can be called as part of the
** implementation of an application-defined [sqlite3_os_init()].
**
** The first argument to sqlite3_config() is an integer
** [configuration option] that determines
** what property of SQLite is to be configured.  Subsequent arguments
** vary depending on the [configuration option]
** in the first argument.
**
** ^When a configuration option is set, sqlite3_config() returns [SQLITE_OK].
** ^If the option is unknown or SQLite is unable to set the option
** then this routine returns a non-zero [error code].
*/
SQLITE_API int sqlite3_config(int, ...);

/*
** CAPI3REF: Configure database connections
**
** The sqlite3_db_config() interface is used to make configuration
** changes to a [database connection].  The interface is similar to
** [sqlite3_config()] except that the changes apply to a single
** [database connection] (specified in the first argument).
**
** The second argument to sqlite3_db_config(D,V,...)  is the
** [SQLITE_DBCONFIG_LOOKASIDE | configuration verb] - an integer code 
** that indicates what aspect of the [database connection] is being configured.
** Subsequent arguments vary depending on the configuration verb.
**
** ^Calls to sqlite3_db_config() return SQLITE_OK if and only if
** the call is considered successful.
*/
SQLITE_API int sqlite3_db_config(sqlite3*, int op, ...);

/*
** CAPI3REF: Memory Allocation Routines
**
** An instance of this object defines the interface between SQLite
** and low-level memory allocation routines.
**
** This object is used in only one place in the SQLite interface.
** A pointer to an instance of this object is the argument to
** [sqlite3_config()] when the configuration option is
** [SQLITE_CONFIG_MALLOC] or [SQLITE_CONFIG_GETMALLOC].  
** By creating an instance of this object
** and passing it to [sqlite3_config]([SQLITE_CONFIG_MALLOC])
** during configuration, an application can specify an alternative
** memory allocation subsystem for SQLite to use for all of its
** dynamic memory needs.
**
** Note that SQLite comes with several [built-in memory allocators]
** that are perfectly adequate for the overwhelming majority of applications
** and that this object is only useful to a tiny minority of applications
** with specialized memory allocation requirements.  This object is
** also used during testing of SQLite in order to specify an alternative
** memory allocator that simulates memory out-of-memory conditions in
** order to verify that SQLite recovers gracefully from such
** conditions.
**
** The xMalloc, xRealloc, and xFree methods must work like the
** malloc(), realloc() and free() functions from the standard C library.
** ^SQLite guarantees that the second argument to
** xRealloc is always a value returned by a prior call to xRoundup.
**
** xSize should return the allocated size of a memory allocation
** previously obtained from xMalloc or xRealloc.  The allocated size
** is always at least as big as the requested size but may be larger.
**
** The xRoundup method returns what would be the allocated size of
** a memory allocation given a particular requested size.  Most memory
** allocators round up memory allocations at least to the next multiple
** of 8.  Some allocators round up to a larger multiple or to a power of 2.
** Every memory allocation request coming in through [sqlite3_malloc()]
** or [sqlite3_realloc()] first calls xRoundup.  If xRoundup returns 0, 
** that causes the corresponding memory allocation to fail.
**
** The xInit method initializes the memory allocator.  For example,
** it might allocate any require mutexes or initialize internal data
** structures.  The xShutdown method is invoked (indirectly) by
** [sqlite3_shutdown()] and should deallocate any resources acquired
** by xInit.  The pAppData pointer is used as the only parameter to
** xInit and xShutdown.
**
** SQLite holds the [SQLITE_MUTEX_STATIC_MASTER] mutex when it invokes
** the xInit method, so the xInit method need not be threadsafe.  The
** xShutdown method is only called from [sqlite3_shutdown()] so it does
** not need to be threadsafe either.  For all other methods, SQLite
** holds the [SQLITE_MUTEX_STATIC_MEM] mutex as long as the
** [SQLITE_CONFIG_MEMSTATUS] configuration option is turned on (which
** it is by default) and so the methods are automatically serialized.
** However, if [SQLITE_CONFIG_MEMSTATUS] is disabled, then the other
** methods must be threadsafe or else make their own arrangements for
** serialization.
**
** SQLite will never invoke xInit() more than once without an intervening
** call to xShutdown().
*/
typedef struct sqlite3_mem_methods sqlite3_mem_methods;
struct sqlite3_mem_methods {
  void *(*xMalloc)(int);         /* Memory allocation function */
  void (*xFree)(void*);          /* Free a prior allocation */
  void *(*xRealloc)(void*,int);  /* Resize an allocation */
  int (*xSize)(void*);           /* Return the size of an allocation */
  int (*xRoundup)(int);          /* Round up request size to allocation size */
  int (*xInit)(void*);           /* Initialize the memory allocator */
  void (*xShutdown)(void*);      /* Deinitialize the memory allocator */
  void *pAppData;                /* Argument to xInit() and xShutdown() */
};

/*
** CAPI3REF: Configuration Options
** KEYWORDS: {configuration option}
**
** These constants are the available integer configuration options that
** can be passed as the first argument to the [sqlite3_config()] interface.
**
** New configuration options may be added in future releases of SQLite.
** Existing configuration options might be discontinued.  Applications
** should check the return code from [sqlite3_config()] to make sure that
** the call worked.  The [sqlite3_config()] interface will return a
** non-zero [error code] if a discontinued or unsupported configuration option
** is invoked.
**
** <dl>
** [[SQLITE_CONFIG_SINGLETHREAD]] <dt>SQLITE_CONFIG_SINGLETHREAD</dt>
** <dd>There are no arguments to this option.  ^This option sets the
** [threading mode] to Single-thread.  In other words, it disables
** all mutexing and puts SQLite into a mode where it can only be used
** by a single thread.   ^If SQLite is compiled with
** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
** it is not possible to change the [threading mode] from its default
** value of Single-thread and so [sqlite3_config()] will return 
** [SQLITE_ERROR] if called with the SQLITE_CONFIG_SINGLETHREAD
** configuration option.</dd>
**
** [[SQLITE_CONFIG_MULTITHREAD]] <dt>SQLITE_CONFIG_MULTITHREAD</dt>
** <dd>There are no arguments to this option.  ^This option sets the
** [threading mode] to Multi-thread.  In other words, it disables
** mutexing on [database connection] and [prepared statement] objects.
** The application is responsible for serializing access to
** [database connections] and [prepared statements].  But other mutexes
** are enabled so that SQLite will be safe to use in a multi-threaded
** environment as long as no two threads attempt to use the same
** [database connection] at the same time.  ^If SQLite is compiled with
** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
** it is not possible to set the Multi-thread [threading mode] and
** [sqlite3_config()] will return [SQLITE_ERROR] if called with the
** SQLITE_CONFIG_MULTITHREAD configuration option.</dd>
**
** [[SQLITE_CONFIG_SERIALIZED]] <dt>SQLITE_CONFIG_SERIALIZED</dt>
** <dd>There are no arguments to this option.  ^This option sets the
** [threading mode] to Serialized. In other words, this option enables
** all mutexes including the recursive
** mutexes on [database connection] and [prepared statement] objects.
** In this mode (which is the default when SQLite is compiled with
** [SQLITE_THREADSAFE=1]) the SQLite library will itself serialize access
** to [database connections] and [prepared statements] so that the
** application is free to use the same [database connection] or the
** same [prepared statement] in different threads at the same time.
** ^If SQLite is compiled with
** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
** it is not possible to set the Serialized [threading mode] and
** [sqlite3_config()] will return [SQLITE_ERROR] if called with the
** SQLITE_CONFIG_SERIALIZED configuration option.</dd>
**
** [[SQLITE_CONFIG_MALLOC]] <dt>SQLITE_CONFIG_MALLOC</dt>
** <dd> ^(This option takes a single argument which is a pointer to an
** instance of the [sqlite3_mem_methods] structure.  The argument specifies
** alternative low-level memory allocation routines to be used in place of
** the memory allocation routines built into SQLite.)^ ^SQLite makes
** its own private copy of the content of the [sqlite3_mem_methods] structure
** before the [sqlite3_config()] call returns.</dd>
**
** [[SQLITE_CONFIG_GETMALLOC]] <dt>SQLITE_CONFIG_GETMALLOC</dt>
** <dd> ^(This option takes a single argument which is a pointer to an
** instance of the [sqlite3_mem_methods] structure.  The [sqlite3_mem_methods]
** structure is filled with the currently defined memory allocation routines.)^
** This option can be used to overload the default memory allocation
** routines with a wrapper that simulations memory allocation failure or
** tracks memory usage, for example. </dd>
**
** [[SQLITE_CONFIG_MEMSTATUS]] <dt>SQLITE_CONFIG_MEMSTATUS</dt>
** <dd> ^This option takes single argument of type int, interpreted as a 
** boolean, which enables or disables the collection of memory allocation 
** statistics. ^(When memory allocation statistics are disabled, the 
** following SQLite interfaces become non-operational:
**   <ul>
**   <li> [sqlite3_memory_used()]
**   <li> [sqlite3_memory_highwater()]
**   <li> [sqlite3_soft_heap_limit64()]
**   <li> [sqlite3_status()]
**   </ul>)^
** ^Memory allocation statistics are enabled by default unless SQLite is
** compiled with [SQLITE_DEFAULT_MEMSTATUS]=0 in which case memory
** allocation statistics are disabled by default.
** </dd>
**
** [[SQLITE_CONFIG_SCRATCH]] <dt>SQLITE_CONFIG_SCRATCH</dt>
** <dd> ^This option specifies a static memory buffer that SQLite can use for
** scratch memory.  There are three arguments:  A pointer an 8-byte
** aligned memory buffer from which the scratch allocations will be
** drawn, the size of each scratch allocation (sz),
** and the maximum number of scratch allocations (N).  The sz
** argument must be a multiple of 16.
** The first argument must be a pointer to an 8-byte aligned buffer
** of at least sz*N bytes of memory.
** ^SQLite will use no more than two scratch buffers per thread.  So
** N should be set to twice the expected maximum number of threads.
** ^SQLite will never require a scratch buffer that is more than 6
** times the database page size. ^If SQLite needs needs additional
** scratch memory beyond what is provided by this configuration option, then 
** [sqlite3_malloc()] will be used to obtain the memory needed.</dd>
**
** [[SQLITE_CONFIG_PAGECACHE]] <dt>SQLITE_CONFIG_PAGECACHE</dt>
** <dd> ^This option specifies a static memory buffer that SQLite can use for
** the database page cache with the default page cache implementation.  
** This configuration should not be used if an application-define page
** cache implementation is loaded using the SQLITE_CONFIG_PCACHE2 option.
** There are three arguments to this option: A pointer to 8-byte aligned
** memory, the size of each page buffer (sz), and the number of pages (N).
** The sz argument should be the size of the largest database page
** (a power of two between 512 and 32768) plus a little extra for each
** page header.  ^The page header size is 20 to 40 bytes depending on
** the host architecture.  ^It is harmless, apart from the wasted memory,
** to make sz a little too large.  The first
** argument should point to an allocation of at least sz*N bytes of memory.
** ^SQLite will use the memory provided by the first argument to satisfy its
** memory needs for the first N pages that it adds to cache.  ^If additional
** page cache memory is needed beyond what is provided by this option, then
** SQLite goes to [sqlite3_malloc()] for the additional storage space.
** The pointer in the first argument must
** be aligned to an 8-byte boundary or subsequent behavior of SQLite
** will be undefined.</dd>
**
** [[SQLITE_CONFIG_HEAP]] <dt>SQLITE_CONFIG_HEAP</dt>
** <dd> ^This option specifies a static memory buffer that SQLite will use
** for all of its dynamic memory allocation needs beyond those provided
** for by [SQLITE_CONFIG_SCRATCH] and [SQLITE_CONFIG_PAGECACHE].
** There are three arguments: An 8-byte aligned pointer to the memory,
** the number of bytes in the memory buffer, and the minimum allocation size.
** ^If the first pointer (the memory pointer) is NULL, then SQLite reverts
** to using its default memory allocator (the system malloc() implementation),
** undoing any prior invocation of [SQLITE_CONFIG_MALLOC].  ^If the
** memory pointer is not NULL and either [SQLITE_ENABLE_MEMSYS3] or
** [SQLITE_ENABLE_MEMSYS5] are defined, then the alternative memory
** allocator is engaged to handle all of SQLites memory allocation needs.
** The first pointer (the memory pointer) must be aligned to an 8-byte
** boundary or subsequent behavior of SQLite will be undefined.
** The minimum allocation size is capped at 2**12. Reasonable values
** for the minimum allocation size are 2**5 through 2**8.</dd>
**
** [[SQLITE_CONFIG_MUTEX]] <dt>SQLITE_CONFIG_MUTEX</dt>
** <dd> ^(This option takes a single argument which is a pointer to an
** instance of the [sqlite3_mutex_methods] structure.  The argument specifies
** alternative low-level mutex routines to be used in place
** the mutex routines built into SQLite.)^  ^SQLite makes a copy of the
** content of the [sqlite3_mutex_methods] structure before the call to
** [sqlite3_config()] returns. ^If SQLite is compiled with
** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
** the entire mutexing subsystem is omitted from the build and hence calls to
** [sqlite3_config()] with the SQLITE_CONFIG_MUTEX configuration option will
** return [SQLITE_ERROR].</dd>
**
** [[SQLITE_CONFIG_GETMUTEX]] <dt>SQLITE_CONFIG_GETMUTEX</dt>
** <dd> ^(This option takes a single argument which is a pointer to an
** instance of the [sqlite3_mutex_methods] structure.  The
** [sqlite3_mutex_methods]
** structure is filled with the currently defined mutex routines.)^
** This option can be used to overload the default mutex allocation
** routines with a wrapper used to track mutex usage for performance
** profiling or testing, for example.   ^If SQLite is compiled with
** the [SQLITE_THREADSAFE | SQLITE_THREADSAFE=0] compile-time option then
** the entire mutexing subsystem is omitted from the build and hence calls to
** [sqlite3_config()] with the SQLITE_CONFIG_GETMUTEX configuration option will
** return [SQLITE_ERROR].</dd>
**
** [[SQLITE_CONFIG_LOOKASIDE]] <dt>SQLITE_CONFIG_LOOKASIDE</dt>
** <dd> ^(This option takes two arguments that determine the default
** memory allocation for the lookaside memory allocator on each
** [database connection].  The first argument is the
** size of each lookaside buffer slot and the second is the number of
** slots allocated to each database connection.)^  ^(This option sets the
** <i>default</i> lookaside size. The [SQLITE_DBCONFIG_LOOKASIDE]
** verb to [sqlite3_db_config()] can be used to change the lookaside
** configuration on individual connections.)^ </dd>
**
** [[SQLITE_CONFIG_PCACHE2]] <dt>SQLITE_CONFIG_PCACHE2</dt>
** <dd> ^(This option takes a single argument which is a pointer to
** an [sqlite3_pcache_methods2] object.  This object specifies the interface
** to a custom page cache implementation.)^  ^SQLite makes a copy of the
** object and uses it for page cache memory allocations.</dd>
**
** [[SQLITE_CONFIG_GETPCACHE2]] <dt>SQLITE_CONFIG_GETPCACHE2</dt>
** <dd> ^(This option takes a single argument which is a pointer to an
** [sqlite3_pcache_methods2] object.  SQLite copies of the current
** page cache implementation into that object.)^ </dd>
**
** [[SQLITE_CONFIG_LOG]] <dt>SQLITE_CONFIG_LOG</dt>
** <dd> The SQLITE_CONFIG_LOG option is used to configure the SQLite
** global [error log].
** (^The SQLITE_CONFIG_LOG option takes two arguments: a pointer to a
** function with a call signature of void(*)(void*,int,const char*), 
** and a pointer to void. ^If the function pointer is not NULL, it is
** invoked by [sqlite3_log()] to process each logging event.  ^If the
** function pointer is NULL, the [sqlite3_log()] interface becomes a no-op.
** ^The void pointer that is the second argument to SQLITE_CONFIG_LOG is
** passed through as the first parameter to the application-defined logger
** function whenever that function is invoked.  ^The second parameter to
** the logger function is a copy of the first parameter to the corresponding
** [sqlite3_log()] call and is intended to be a [result code] or an
** [extended result code].  ^The third parameter passed to the logger is
** log message after formatting via [sqlite3_snprintf()].
** The SQLite logging interface is not reentrant; the logger function
** supplied by the application must not invoke any SQLite interface.
** In a multi-threaded application, the application-defined logger
** function must be threadsafe. </dd>
**
** [[SQLITE_CONFIG_URI]] <dt>SQLITE_CONFIG_URI
** <dd>^(This option takes a single argument of type int. If non-zero, then
** URI handling is globally enabled. If the parameter is zero, then URI handling
** is globally disabled.)^ ^If URI handling is globally enabled, all filenames
** passed to [sqlite3_open()], [sqlite3_open_v2()], [sqlite3_open16()] or
** specified as part of [ATTACH] commands are interpreted as URIs, regardless
** of whether or not the [SQLITE_OPEN_URI] flag is set when the database
** connection is opened. ^If it is globally disabled, filenames are
** only interpreted as URIs if the SQLITE_OPEN_URI flag is set when the
** database connection is opened. ^(By default, URI handling is globally
** disabled. The default value may be changed by compiling with the
** [SQLITE_USE_URI] symbol defined.)^
**
** [[SQLITE_CONFIG_COVERING_INDEX_SCAN]] <dt>SQLITE_CONFIG_COVERING_INDEX_SCAN
** <dd>^This option takes a single integer argument which is interpreted as
** a boolean in order to enable or disable the use of covering indices for
** full table scans in the query optimizer.  ^The default setting is determined
** by the [SQLITE_ALLOW_COVERING_INDEX_SCAN] compile-time option, or is "on"
** if that compile-time option is omitted.
** The ability to disable the use of covering indices for full table scans
** is because some incorrectly coded legacy applications might malfunction
** when the optimization is enabled.  Providing the ability to
** disable the optimization allows the older, buggy application code to work
** without change even with newer versions of SQLite.
**
** [[SQLITE_CONFIG_PCACHE]] [[SQLITE_CONFIG_GETPCACHE]]
** <dt>SQLITE_CONFIG_PCACHE and SQLITE_CONFIG_GETPCACHE
** <dd> These options are obsolete and should not be used by new code.
** They are retained for backwards compatibility but are now no-ops.
** </dd>
**
** [[SQLITE_CONFIG_SQLLOG]]
** <dt>SQLITE_CONFIG_SQLLOG
** <dd>This option is only available if sqlite is compiled with the
** [SQLITE_ENABLE_SQLLOG] pre-processor macro defined. The first argument should
** be a pointer to a function of type void(*)(void*,sqlite3*,const char*, int).
** The second should be of type (void*). The callback is invoked by the library
** in three separate circumstances, identified by the value passed as the
** fourth parameter. If the fourth parameter is 0, then the database connection
** passed as the second argument has just been opened. The third argument
** points to a buffer containing the name of the main database file. If the
** fourth parameter is 1, then the SQL statement that the third parameter
** points to has just been executed. Or, if the fourth parameter is 2, then
** the connection being passed as the second parameter is being closed. The
** third parameter is passed NULL In this case.  An example of using this
** configuration option can be seen in the "test_sqllog.c" source file in
** the canonical SQLite source tree.</dd>
**
** [[SQLITE_CONFIG_MMAP_SIZE]]
** <dt>SQLITE_CONFIG_MMAP_SIZE
** <dd>^SQLITE_CONFIG_MMAP_SIZE takes two 64-bit integer (sqlite3_int64) values
** that are the default mmap size limit (the default setting for
** [PRAGMA mmap_size]) and the maximum allowed mmap size limit.
** ^The default setting can be overridden by each database connection using
** either the [PRAGMA mmap_size] command, or by using the
** [SQLITE_FCNTL_MMAP_SIZE] file control.  ^(The maximum allowed mmap size
** cannot be changed at run-time.  Nor may the maximum allowed mmap size
** exceed the compile-time maximum mmap size set by the
** [SQLITE_MAX_MMAP_SIZE] compile-time option.)^
** ^If either argument to this option is negative, then that argument is
** changed to its compile-time default.
**
** [[SQLITE_CONFIG_WIN32_HEAPSIZE]]
** <dt>SQLITE_CONFIG_WIN32_HEAPSIZE
** <dd>^This option is only available if SQLite is compiled for Windows
** with the [SQLITE_WIN32_MALLOC] pre-processor macro defined.
** SQLITE_CONFIG_WIN32_HEAPSIZE takes a 32-bit unsigned integer value
** that specifies the maximum size of the created heap.
** </dl>
*/
#define SQLITE_CONFIG_SINGLETHREAD  1  /* nil */
#define SQLITE_CONFIG_MULTITHREAD   2  /* nil */
#define SQLITE_CONFIG_SERIALIZED    3  /* nil */
#define SQLITE_CONFIG_MALLOC        4  /* sqlite3_mem_methods* */
#define SQLITE_CONFIG_GETMALLOC     5  /* sqlite3_mem_methods* */
#define SQLITE_CONFIG_SCRATCH       6  /* void*, int sz, int N */
#define SQLITE_CONFIG_PAGECACHE     7  /* void*, int sz, int N */
#define SQLITE_CONFIG_HEAP          8  /* void*, int nByte, int min */
#define SQLITE_CONFIG_MEMSTATUS     9  /* boolean */
#define SQLITE_CONFIG_MUTEX        10  /* sqlite3_mutex_methods* */
#define SQLITE_CONFIG_GETMUTEX     11  /* sqlite3_mutex_methods* */
/* previously SQLITE_CONFIG_CHUNKALLOC 12 which is now unused. */ 
#define SQLITE_CONFIG_LOOKASIDE    13  /* int int */
#define SQLITE_CONFIG_PCACHE       14  /* no-op */
#define SQLITE_CONFIG_GETPCACHE    15  /* no-op */
#define SQLITE_CONFIG_LOG          16  /* xFunc, void* */
#define SQLITE_CONFIG_URI          17  /* int */
#define SQLITE_CONFIG_PCACHE2      18  /* sqlite3_pcache_methods2* */
#define SQLITE_CONFIG_GETPCACHE2   19  /* sqlite3_pcache_methods2* */
#define SQLITE_CONFIG_COVERING_INDEX_SCAN 20  /* int */
#define SQLITE_CONFIG_SQLLOG       21  /* xSqllog, void* */
#define SQLITE_CONFIG_MMAP_SIZE    22  /* sqlite3_int64, sqlite3_int64 */
#define SQLITE_CONFIG_WIN32_HEAPSIZE      23  /* int nByte */

/*
** CAPI3REF: Database Connection Configuration Options
**
** These constants are the available integer configuration options that
** can be passed as the second argument to the [sqlite3_db_config()] interface.
**
** New configuration options may be added in future releases of SQLite.
** Existing configuration options might be discontinued.  Applications
** should check the return code from [sqlite3_db_config()] to make sure that
** the call worked.  ^The [sqlite3_db_config()] interface will return a
** non-zero [error code] if a discontinued or unsupported configuration option
** is invoked.
**
** <dl>
** <dt>SQLITE_DBCONFIG_LOOKASIDE</dt>
** <dd> ^This option takes three additional arguments that determine the 
** [lookaside memory allocator] configuration for the [database connection].
** ^The first argument (the third parameter to [sqlite3_db_config()] is a
** pointer to a memory buffer to use for lookaside memory.
** ^The first argument after the SQLITE_DBCONFIG_LOOKASIDE verb
** may be NULL in which case SQLite will allocate the
** lookaside buffer itself using [sqlite3_malloc()]. ^The second argument is the
** size of each lookaside buffer slot.  ^The third argument is the number of
** slots.  The size of the buffer in the first argument must be greater than
** or equal to the product of the second and third arguments.  The buffer
** must be aligned to an 8-byte boundary.  ^If the second argument to
** SQLITE_DBCONFIG_LOOKASIDE is not a multiple of 8, it is internally
** rounded down to the next smaller multiple of 8.  ^(The lookaside memory
** configuration for a database connection can only be changed when that
** connection is not currently using lookaside memory, or in other words
** when the "current value" returned by
** [sqlite3_db_status](D,[SQLITE_CONFIG_LOOKASIDE],...) is zero.
** Any attempt to change the lookaside memory configuration when lookaside
** memory is in use leaves the configuration unchanged and returns 
** [SQLITE_BUSY].)^</dd>
**
** <dt>SQLITE_DBCONFIG_ENABLE_FKEY</dt>
** <dd> ^This option is used to enable or disable the enforcement of
** [foreign key constraints].  There should be two additional arguments.
** The first argument is an integer which is 0 to disable FK enforcement,
** positive to enable FK enforcement or negative to leave FK enforcement
** unchanged.  The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether FK enforcement is off or on
** following this call.  The second parameter may be a NULL pointer, in
** which case the FK enforcement setting is not reported back. </dd>
**
** <dt>SQLITE_DBCONFIG_ENABLE_TRIGGER</dt>
** <dd> ^This option is used to enable or disable [CREATE TRIGGER | triggers].
** There should be two additional arguments.
** The first argument is an integer which is 0 to disable triggers,
** positive to enable triggers or negative to leave the setting unchanged.
** The second parameter is a pointer to an integer into which
** is written 0 or 1 to indicate whether triggers are disabled or enabled
** following this call.  The second parameter may be a NULL pointer, in
** which case the trigger setting is not reported back. </dd>
**
** </dl>
*/
#define SQLITE_DBCONFIG_LOOKASIDE       1001  /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY     1002  /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER  1003  /* int int* */


/*
** CAPI3REF: Enable Or Disable Extended Result Codes
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
** [extended result codes] feature of SQLite. ^The extended result
** codes are disabled by default for historical compatibility.
*/
SQLITE_API int sqlite3_extended_result_codes(sqlite3*, int onoff);

/*
** CAPI3REF: Last Insert Rowid
**
** ^Each entry in most SQLite tables (except for [WITHOUT ROWID] tables)
** has a unique 64-bit signed
** integer key called the [ROWID | "rowid"]. ^The rowid is always available
** as an undeclared column named ROWID, OID, or _ROWID_ as long as those
** names are not also used by explicitly declared columns. ^If
** the table has a column of type [INTEGER PRIMARY KEY] then that column
** is another alias for the rowid.
**
** ^The sqlite3_last_insert_rowid(D) interface returns the [rowid] of the 
** most recent successful [INSERT] into a rowid table or [virtual table]
** on database connection D.
** ^Inserts into [WITHOUT ROWID] tables are not recorded.
** ^If no successful [INSERT]s into rowid tables
** have ever occurred on the database connection D, 
** then sqlite3_last_insert_rowid(D) returns zero.
**
** ^(If an [INSERT] occurs within a trigger or within a [virtual table]
** method, then this routine will return the [rowid] of the inserted
** row as long as the trigger or virtual table method is running.
** But once the trigger or virtual table method ends, the value returned 
** by this routine reverts to what it was before the trigger or virtual
** table method began.)^
**
** ^An [INSERT] that fails due to a constraint violation is not a
** successful [INSERT] and does not change the value returned by this
** routine.  ^Thus INSERT OR FAIL, INSERT OR IGNORE, INSERT OR ROLLBACK,
** and INSERT OR ABORT make no changes to the return value of this
** routine when their insertion fails.  ^(When INSERT OR REPLACE
** encounters a constraint violation, it does not fail.  The
** INSERT continues to completion after deleting rows that caused
** the constraint problem so INSERT OR REPLACE will always change
** the return value of this interface.)^
**
** ^For the purposes of this routine, an [INSERT] is considered to
** be successful even if it is subsequently rolled back.
**
** This function is accessible to SQL statements via the
** [last_insert_rowid() SQL function].
**
** If a separate thread performs a new [INSERT] on the same
** database connection while the [sqlite3_last_insert_rowid()]
** function is running and thus changes the last insert [rowid],
** then the value returned by [sqlite3_last_insert_rowid()] is
** unpredictable and might not equal either the old or the new
** last insert [rowid].
*/
SQLITE_API sqlite3_int64 sqlite3_last_insert_rowid(sqlite3*);

/*
** CAPI3REF: Count The Number Of Rows Modified
**
** ^This function returns the number of database rows that were changed
** or inserted or deleted by the most recently completed SQL statement
** on the [database connection] specified by the first parameter.
** ^(Only changes that are directly specified by the [INSERT], [UPDATE],
** or [DELETE] statement are counted.  Auxiliary changes caused by
** triggers or [foreign key actions] are not counted.)^ Use the
** [sqlite3_total_changes()] function to find the total number of changes
** including changes caused by triggers and foreign key actions.
**
** ^Changes to a view that are simulated by an [INSTEAD OF trigger]
** are not counted.  Only real table changes are counted.
**
** ^(A "row change" is a change to a single row of a single table
** caused by an INSERT, DELETE, or UPDATE statement.  Rows that
** are changed as side effects of [REPLACE] constraint resolution,
** rollback, ABORT processing, [DROP TABLE], or by any other
** mechanisms do not count as direct row changes.)^
**
** A "trigger context" is a scope of execution that begins and
** ends with the script of a [CREATE TRIGGER | trigger]. 
** Most SQL statements are
** evaluated outside of any trigger.  This is the "top level"
** trigger context.  If a trigger fires from the top level, a
** new trigger context is entered for the duration of that one
** trigger.  Subtriggers create subcontexts for their duration.
**
** ^Calling [sqlite3_exec()] or [sqlite3_step()] recursively does
** not create a new trigger context.
**
** ^This function returns the number of direct row changes in the
** most recent INSERT, UPDATE, or DELETE statement within the same
** trigger context.
**
** ^Thus, when called from the top level, this function returns the
** number of changes in the most recent INSERT, UPDATE, or DELETE
** that also occurred at the top level.  ^(Within the body of a trigger,
** the sqlite3_changes() interface can be called to find the number of
** changes in the most recently completed INSERT, UPDATE, or DELETE
** statement within the body of the same trigger.
** However, the number returned does not include changes
** caused by subtriggers since those have their own context.)^
**
** See also the [sqlite3_total_changes()] interface, the
** [count_changes pragma], and the [changes() SQL function].
**
** If a separate thread makes changes on the same database connection
** while [sqlite3_changes()] is running then the value returned
** is unpredictable and not meaningful.
*/
SQLITE_API int sqlite3_changes(sqlite3*);

/*
** CAPI3REF: Total Number Of Rows Modified
**
** ^This function returns the number of row changes caused by [INSERT],
** [UPDATE] or [DELETE] statements since the [database connection] was opened.
** ^(The count returned by sqlite3_total_changes() includes all changes
** from all [CREATE TRIGGER | trigger] contexts and changes made by
** [foreign key actions]. However,
** the count does not include changes used to implement [REPLACE] constraints,
** do rollbacks or ABORT processing, or [DROP TABLE] processing.  The
** count does not include rows of views that fire an [INSTEAD OF trigger],
** though if the INSTEAD OF trigger makes changes of its own, those changes 
** are counted.)^
** ^The sqlite3_total_changes() function counts the changes as soon as
** the statement that makes them is completed (when the statement handle
** is passed to [sqlite3_reset()] or [sqlite3_finalize()]).
**
** See also the [sqlite3_changes()] interface, the
** [count_changes pragma], and the [total_changes() SQL function].
**
** If a separate thread makes changes on the same database connection
** while [sqlite3_total_changes()] is running then the value
** returned is unpredictable and not meaningful.
*/
SQLITE_API int sqlite3_total_changes(sqlite3*);

/*
** CAPI3REF: Interrupt A Long-Running Query
**
** ^This function causes any pending database operation to abort and
** return at its earliest opportunity. This routine is typically
** called in response to a user action such as pressing "Cancel"
** or Ctrl-C where the user wants a long query operation to halt
** immediately.
**
** ^It is safe to call this routine from a thread different from the
** thread that is currently running the database operation.  But it
** is not safe to call this routine with a [database connection] that
** is closed or might close before sqlite3_interrupt() returns.
**
** ^If an SQL operation is very nearly finished at the time when
** sqlite3_interrupt() is called, then it might not have an opportunity
** to be interrupted and might continue to completion.
**
** ^An SQL operation that is interrupted will return [SQLITE_INTERRUPT].
** ^If the interrupted SQL operation is an INSERT, UPDATE, or DELETE
** that is inside an explicit transaction, then the entire transaction
** will be rolled back automatically.
**
** ^The sqlite3_interrupt(D) call is in effect until all currently running
** SQL statements on [database connection] D complete.  ^Any new SQL statements
** that are started after the sqlite3_interrupt() call and before the 
** running statements reaches zero are interrupted as if they had been
** running prior to the sqlite3_interrupt() call.  ^New SQL statements
** that are started after the running statement count reaches zero are
** not effected by the sqlite3_interrupt().
** ^A call to sqlite3_interrupt(D) that occurs when there are no running
** SQL statements is a no-op and has no effect on SQL statements
** that are started after the sqlite3_interrupt() call returns.
**
** If the database connection closes while [sqlite3_interrupt()]
** is running then bad things will likely happen.
*/
SQLITE_API void sqlite3_interrupt(sqlite3*);

/*
** CAPI3REF: Determine If An SQL Statement Is Complete
**
** These routines are useful during command-line input to determine if the
** currently entered text seems to form a complete SQL statement or
** if additional input is needed before sending the text into
** SQLite for parsing.  ^These routines return 1 if the input string
** appears to be a complete SQL statement.  ^A statement is judged to be
** complete if it ends with a semicolon token and is not a prefix of a
** well-formed CREATE TRIGGER statement.  ^Semicolons that are embedded within
** string literals or quoted identifier names or comments are not
** independent tokens (they are part of the token in which they are
** embedded) and thus do not count as a statement terminator.  ^Whitespace
** and comments that follow the final semicolon are ignored.
**
** ^These routines return 0 if the statement is incomplete.  ^If a
** memory allocation fails, then SQLITE_NOMEM is returned.
**
** ^These routines do not parse the SQL statements thus
** will not detect syntactically incorrect SQL.
**
** ^(If SQLite has not been initialized using [sqlite3_initialize()] prior 
** to invoking sqlite3_complete16() then sqlite3_initialize() is invoked
** automatically by sqlite3_complete16().  If that initialization fails,
** then the return value from sqlite3_complete16() will be non-zero
** regardless of whether or not the input SQL is complete.)^
**
** The input to [sqlite3_complete()] must be a zero-terminated
** UTF-8 string.
**
** The input to [sqlite3_complete16()] must be a zero-terminated
** UTF-16 string in native byte order.
*/
SQLITE_API int sqlite3_complete(const char *sql);
SQLITE_API int sqlite3_complete16(const void *sql);

/*
** CAPI3REF: Register A Callback To Handle SQLITE_BUSY Errors
**
** ^This routine sets a callback function that might be invoked whenever
** an attempt is made to open a database table that another thread
** or process has locked.
**
** ^If the busy callback is NULL, then [SQLITE_BUSY] or [SQLITE_IOERR_BLOCKED]
** is returned immediately upon encountering the lock.  ^If the busy callback
** is not NULL, then the callback might be invoked with two arguments.
**
** ^The first argument to the busy handler is a copy of the void* pointer which
** is the third argument to sqlite3_busy_handler().  ^The second argument to
** the busy handler callback is the number of times that the busy handler has
** been invoked for this locking event.  ^If the
** busy callback returns 0, then no additional attempts are made to
** access the database and [SQLITE_BUSY] or [SQLITE_IOERR_BLOCKED] is returned.
** ^If the callback returns non-zero, then another attempt
** is made to open the database for reading and the cycle repeats.
**
** The presence of a busy handler does not guarantee that it will be invoked
** when there is lock contention. ^If SQLite determines that invoking the busy
** handler could result in a deadlock, it will go ahead and return [SQLITE_BUSY]
** or [SQLITE_IOERR_BLOCKED] instead of invoking the busy handler.
** Consider a scenario where one process is holding a read lock that
** it is trying to promote to a reserved lock and
** a second process is holding a reserved lock that it is trying
** to promote to an exclusive lock.  The first process cannot proceed
** because it is blocked by the second and the second process cannot
** proceed because it is blocked by the first.  If both processes
** invoke the busy handlers, neither will make any progress.  Therefore,
** SQLite returns [SQLITE_BUSY] for the first process, hoping that this
** will induce the first process to release its read lock and allow
** the second process to proceed.
**
** ^The default busy callback is NULL.
**
** ^The [SQLITE_BUSY] error is converted to [SQLITE_IOERR_BLOCKED]
** when SQLite is in the middle of a large transaction where all the
** changes will not fit into the in-memory cache.  SQLite will
** already hold a RESERVED lock on the database file, but it needs
** to promote this lock to EXCLUSIVE so that it can spill cache
** pages into the database file without harm to concurrent
** readers.  ^If it is unable to promote the lock, then the in-memory
** cache will be left in an inconsistent state and so the error
** code is promoted from the relatively benign [SQLITE_BUSY] to
** the more severe [SQLITE_IOERR_BLOCKED].  ^This error code promotion
** forces an automatic rollback of the changes.  See the
** <a href="/cvstrac/wiki?p=CorruptionFollowingBusyError">
** CorruptionFollowingBusyError</a> wiki page for a discussion of why
** this is important.
**
** ^(There can only be a single busy handler defined for each
** [database connection].  Setting a new busy handler clears any
** previously set handler.)^  ^Note that calling [sqlite3_busy_timeout()]
** will also set or clear the busy handler.
**
** The busy callback should not take any actions which modify the
** database connection that invoked the busy handler.  Any such actions
** result in undefined behavior.
** 
** A busy handler must not close the database connection
** or [prepared statement] that invoked the busy handler.
*/
SQLITE_API int sqlite3_busy_handler(sqlite3*, int(*)(void*,int), void*);

/*
** CAPI3REF: Set A Busy Timeout
**
** ^This routine sets a [sqlite3_busy_handler | busy handler] that sleeps
** for a specified amount of time when a table is locked.  ^The handler
** will sleep multiple times until at least "ms" milliseconds of sleeping
** have accumulated.  ^After at least "ms" milliseconds of sleeping,
** the handler returns 0 which causes [sqlite3_step()] to return
** [SQLITE_BUSY] or [SQLITE_IOERR_BLOCKED].
**
** ^Calling this routine with an argument less than or equal to zero
** turns off all busy handlers.
**
** ^(There can only be a single busy handler for a particular
** [database connection] any any given moment.  If another busy handler
** was defined  (using [sqlite3_busy_handler()]) prior to calling
** this routine, that other busy handler is cleared.)^
*/
SQLITE_API int sqlite3_busy_timeout(sqlite3*, int ms);

/*
** CAPI3REF: Convenience Routines For Running Queries
**
** This is a legacy interface that is preserved for backwards compatibility.
** Use of this interface is not recommended.
**
** Definition: A <b>result table</b> is memory data structure created by the
** [sqlite3_get_table()] interface.  A result table records the
** complete query results from one or more queries.
**
** The table conceptually has a number of rows and columns.  But
** these numbers are not part of the result table itself.  These
** numbers are obtained separately.  Let N be the number of rows
** and M be the number of columns.
**
** A result table is an array of pointers to zero-terminated UTF-8 strings.
** There are (N+1)*M elements in the array.  The first M pointers point
** to zero-terminated strings that  contain the names of the columns.
** The remaining entries all point to query results.  NULL values result
** in NULL pointers.  All other values are in their UTF-8 zero-terminated
** string representation as returned by [sqlite3_column_text()].
**
** A result table might consist of one or more memory allocations.
** It is not safe to pass a result table directly to [sqlite3_free()].
** A result table should be deallocated using [sqlite3_free_table()].
**
** ^(As an example of the result table format, suppose a query result
** is as follows:
**
** <blockquote><pre>
**        Name        | Age
**        -----------------------
**        Alice       | 43
**        Bob         | 28
**        Cindy       | 21
** </pre></blockquote>
**
** There are two column (M==2) and three rows (N==3).  Thus the
** result table has 8 entries.  Suppose the result table is stored
** in an array names azResult.  Then azResult holds this content:
**
** <blockquote><pre>
**        azResult&#91;0] = "Name";
**        azResult&#91;1] = "Age";
**        azResult&#91;2] = "Alice";
**        azResult&#91;3] = "43";
**        azResult&#91;4] = "Bob";
**        azResult&#91;5] = "28";
**        azResult&#91;6] = "Cindy";
**        azResult&#91;7] = "21";
** </pre></blockquote>)^
**
** ^The sqlite3_get_table() function evaluates one or more
** semicolon-separated SQL statements in the zero-terminated UTF-8
** string of its 2nd parameter and returns a result table to the
** pointer given in its 3rd parameter.
**
** After the application has finished with the result from sqlite3_get_table(),
** it must pass the result table pointer to sqlite3_free_table() in order to
** release the memory that was malloced.  Because of the way the
** [sqlite3_malloc()] happens within sqlite3_get_table(), the calling
** function must not try to call [sqlite3_free()] directly.  Only
** [sqlite3_free_table()] is able to release the memory properly and safely.
**
** The sqlite3_get_table() interface is implemented as a wrapper around
** [sqlite3_exec()].  The sqlite3_get_table() routine does not have access
** to any internal data structures of SQLite.  It uses only the public
** interface defined here.  As a consequence, errors that occur in the
** wrapper layer outside of the internal [sqlite3_exec()] call are not
** reflected in subsequent calls to [sqlite3_errcode()] or
** [sqlite3_errmsg()].
*/
SQLITE_API int sqlite3_get_table(
  sqlite3 *db,          /* An open database */
  const char *zSql,     /* SQL to be evaluated */
  char ***pazResult,    /* Results of the query */
  int *pnRow,           /* Number of result rows written here */
  int *pnColumn,        /* Number of result columns written here */
  char **pzErrmsg       /* Error msg written here */
);
SQLITE_API void sqlite3_free_table(char **result);

/*
** CAPI3REF: Formatted String Printing Functions
**
** These routines are work-alikes of the "printf()" family of functions
** from the standard C library.
**
** ^The sqlite3_mprintf() and sqlite3_vmprintf() routines write their
** results into memory obtained from [sqlite3_malloc()].
** The strings returned by these two routines should be
** released by [sqlite3_free()].  ^Both routines return a
** NULL pointer if [sqlite3_malloc()] is unable to allocate enough
** memory to hold the resulting string.
**
** ^(The sqlite3_snprintf() routine is similar to "snprintf()" from
** the standard C library.  The result is written into the
** buffer supplied as the second parameter whose size is given by
** the first parameter. Note that the order of the
** first two parameters is reversed from snprintf().)^  This is an
** historical accident that cannot be fixed without breaking
** backwards compatibility.  ^(Note also that sqlite3_snprintf()
** returns a pointer to its buffer instead of the number of
** characters actually written into the buffer.)^  We admit that
** the number of characters written would be a more useful return
** value but we cannot change the implementation of sqlite3_snprintf()
** now without breaking compatibility.
**
** ^As long as the buffer size is greater than zero, sqlite3_snprintf()
** guarantees that the buffer is always zero-terminated.  ^The first
** parameter "n" is the total size of the buffer, including space for
** the zero terminator.  So the longest string that can be completely
** written will be n-1 characters.
**
** ^The sqlite3_vsnprintf() routine is a varargs version of sqlite3_snprintf().
**
** These routines all implement some additional formatting
** options that are useful for constructing SQL statements.
** All of the usual printf() formatting options apply.  In addition, there
** is are "%q", "%Q", and "%z" options.
**
** ^(The %q option works like %s in that it substitutes a nul-terminated
** string from the argument list.  But %q also doubles every '\'' character.
** %q is designed for use inside a string literal.)^  By doubling each '\''
** character it escapes that character and allows it to be inserted into
** the string.
**
** For example, assume the string variable zText contains text as follows:
**
** <blockquote><pre>
**  char *zText = "It's a happy day!";
** </pre></blockquote>
**
** One can use this text in an SQL statement as follows:
**
** <blockquote><pre>
**  char *zSQL = sqlite3_mprintf("INSERT INTO table VALUES('%q')", zText);
**  sqlite3_exec(db, zSQL, 0, 0, 0);
**  sqlite3_free(zSQL);
** </pre></blockquote>
**
** Because the %q format string is used, the '\'' character in zText
** is escaped and the SQL generated is as follows:
**
** <blockquote><pre>
**  INSERT INTO table1 VALUES('It''s a happy day!')
** </pre></blockquote>
**
** This is correct.  Had we used %s instead of %q, the generated SQL
** would have looked like this:
**
** <blockquote><pre>
**  INSERT INTO table1 VALUES('It's a happy day!');
** </pre></blockquote>
**
** This second example is an SQL syntax error.  As a general rule you should
** always use %q instead of %s when inserting text into a string literal.
**
** ^(The %Q option works like %q except it also adds single quotes around
** the outside of the total string.  Additionally, if the parameter in the
** argument list is a NULL pointer, %Q substitutes the text "NULL" (without
** single quotes).)^  So, for example, one could say:
**
** <blockquote><pre>
**  char *zSQL = sqlite3_mprintf("INSERT INTO table VALUES(%Q)", zText);
**  sqlite3_exec(db, zSQL, 0, 0, 0);
**  sqlite3_free(zSQL);
** </pre></blockquote>
**
** The code above will render a correct SQL statement in the zSQL
** variable even if the zText variable is a NULL pointer.
**
** ^(The "%z" formatting option works like "%s" but with the
** addition that after the string has been read and copied into
** the result, [sqlite3_free()] is called on the input string.)^
*/
SQLITE_API char *sqlite3_mprintf(const char*,...);
SQLITE_API char *sqlite3_vmprintf(const char*, va_list);
SQLITE_API char *sqlite3_snprintf(int,char*,const char*, ...);
SQLITE_API char *sqlite3_vsnprintf(int,char*,const char*, va_list);

/*
** CAPI3REF: Memory Allocation Subsystem
**
** The SQLite core uses these three routines for all of its own
** internal memory allocation needs. "Core" in the previous sentence
** does not include operating-system specific VFS implementation.  The
** Windows VFS uses native malloc() and free() for some operations.
**
** ^The sqlite3_malloc() routine returns a pointer to a block
** of memory at least N bytes in length, where N is the parameter.
** ^If sqlite3_malloc() is unable to obtain sufficient free
** memory, it returns a NULL pointer.  ^If the parameter N to
** sqlite3_malloc() is zero or negative then sqlite3_malloc() returns
** a NULL pointer.
**
** ^Calling sqlite3_free() with a pointer previously returned
** by sqlite3_malloc() or sqlite3_realloc() releases that memory so
** that it might be reused.  ^The sqlite3_free() routine is
** a no-op if is called with a NULL pointer.  Passing a NULL pointer
** to sqlite3_free() is harmless.  After being freed, memory
** should neither be read nor written.  Even reading previously freed
** memory might result in a segmentation fault or other severe error.
** Memory corruption, a segmentation fault, or other severe error
** might result if sqlite3_free() is called with a non-NULL pointer that
** was not obtained from sqlite3_malloc() or sqlite3_realloc().
**
** ^(The sqlite3_realloc() interface attempts to resize a
** prior memory allocation to be at least N bytes, where N is the
** second parameter.  The memory allocation to be resized is the first
** parameter.)^ ^ If the first parameter to sqlite3_realloc()
** is a NULL pointer then its behavior is identical to calling
** sqlite3_malloc(N) where N is the second parameter to sqlite3_realloc().
** ^If the second parameter to sqlite3_realloc() is zero or
** negative then the behavior is exactly the same as calling
** sqlite3_free(P) where P is the first parameter to sqlite3_realloc().
** ^sqlite3_realloc() returns a pointer to a memory allocation
** of at least N bytes in size or NULL if sufficient memory is unavailable.
** ^If M is the size of the prior allocation, then min(N,M) bytes
** of the prior allocation are copied into the beginning of buffer returned
** by sqlite3_realloc() and the prior allocation is freed.
** ^If sqlite3_realloc() returns NULL, then the prior allocation
** is not freed.
**
** ^The memory returned by sqlite3_malloc() and sqlite3_realloc()
** is always aligned to at least an 8 byte boundary, or to a
** 4 byte boundary if the [SQLITE_4_BYTE_ALIGNED_MALLOC] compile-time
** option is used.
**
** In SQLite version 3.5.0 and 3.5.1, it was possible to define
** the SQLITE_OMIT_MEMORY_ALLOCATION which would cause the built-in
** implementation of these routines to be omitted.  That capability
** is no longer provided.  Only built-in memory allocators can be used.
**
** Prior to SQLite version 3.7.10, the Windows OS interface layer called
** the system malloc() and free() directly when converting
** filenames between the UTF-8 encoding used by SQLite
** and whatever filename encoding is used by the particular Windows
** installation.  Memory allocation errors were detected, but
** they were reported back as [SQLITE_CANTOPEN] or
** [SQLITE_IOERR] rather than [SQLITE_NOMEM].
**
** The pointer arguments to [sqlite3_free()] and [sqlite3_realloc()]
** must be either NULL or else pointers obtained from a prior
** invocation of [sqlite3_malloc()] or [sqlite3_realloc()] that have
** not yet been released.
**
** The application must not read or write any part of
** a block of memory after it has been released using
** [sqlite3_free()] or [sqlite3_realloc()].
*/
SQLITE_API void *sqlite3_malloc(int);
SQLITE_API void *sqlite3_realloc(void*, int);
SQLITE_API void sqlite3_free(void*);

/*
** CAPI3REF: Memory Allocator Statistics
**
** SQLite provides these two interfaces for reporting on the status
** of the [sqlite3_malloc()], [sqlite3_free()], and [sqlite3_realloc()]
** routines, which form the built-in memory allocation subsystem.
**
** ^The [sqlite3_memory_used()] routine returns the number of bytes
** of memory currently outstanding (malloced but not freed).
** ^The [sqlite3_memory_highwater()] routine returns the maximum
** value of [sqlite3_memory_used()] since the high-water mark
** was last reset.  ^The values returned by [sqlite3_memory_used()] and
** [sqlite3_memory_highwater()] include any overhead
** added by SQLite in its implementation of [sqlite3_malloc()],
** but not overhead added by the any underlying system library
** routines that [sqlite3_malloc()] may call.
**
** ^The memory high-water mark is reset to the current value of
** [sqlite3_memory_used()] if and only if the parameter to
** [sqlite3_memory_highwater()] is true.  ^The value returned
** by [sqlite3_memory_highwater(1)] is the high-water mark
** prior to the reset.
*/
SQLITE_API sqlite3_int64 sqlite3_memory_used(void);
SQLITE_API sqlite3_int64 sqlite3_memory_highwater(int resetFlag);

/*
** CAPI3REF: Pseudo-Random Number Generator
**
** SQLite contains a high-quality pseudo-random number generator (PRNG) used to
** select random [ROWID | ROWIDs] when inserting new records into a table that
** already uses the largest possible [ROWID].  The PRNG is also used for
** the build-in random() and randomblob() SQL functions.  This interface allows
** applications to access the same PRNG for other purposes.
**
** ^A call to this routine stores N bytes of randomness into buffer P.
**
** ^The first time this routine is invoked (either internally or by
** the application) the PRNG is seeded using randomness obtained
** from the xRandomness method of the default [sqlite3_vfs] object.
** ^On all subsequent invocations, the pseudo-randomness is generated
** internally and without recourse to the [sqlite3_vfs] xRandomness
** method.
*/
SQLITE_API void sqlite3_randomness(int N, void *P);

/*
** CAPI3REF: Compile-Time Authorization Callbacks
**
** ^This routine registers an authorizer callback with a particular
** [database connection], supplied in the first argument.
** ^The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
** [sqlite3_prepare16()] and [sqlite3_prepare16_v2()].  ^At various
** points during the compilation process, as logic is being created
** to perform various actions, the authorizer callback is invoked to
** see if those actions are allowed.  ^The authorizer callback should
** return [SQLITE_OK] to allow the action, [SQLITE_IGNORE] to disallow the
** specific action but allow the SQL statement to continue to be
** compiled, or [SQLITE_DENY] to cause the entire SQL statement to be
** rejected with an error.  ^If the authorizer callback returns
** any value other than [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY]
** then the [sqlite3_prepare_v2()] or equivalent call that triggered
** the authorizer will fail with an error message.
**
** When the callback returns [SQLITE_OK], that means the operation
** requested is ok.  ^When the callback returns [SQLITE_DENY], the
** [sqlite3_prepare_v2()] or equivalent call that triggered the
** authorizer will fail with an error message explaining that
** access is denied. 
**
** ^The first parameter to the authorizer callback is a copy of the third
** parameter to the sqlite3_set_authorizer() interface. ^The second parameter
** to the callback is an integer [SQLITE_COPY | action code] that specifies
** the particular action to be authorized. ^The third through sixth parameters
** to the callback are zero-terminated strings that contain additional
** details about the action to be authorized.
**
** ^If the action code is [SQLITE_READ]
** and the callback returns [SQLITE_IGNORE] then the
** [prepared statement] statement is constructed to substitute
** a NULL value in place of the table column that would have
** been read if [SQLITE_OK] had been returned.  The [SQLITE_IGNORE]
** return can be used to deny an untrusted user access to individual
** columns of a table.
** ^If the action code is [SQLITE_DELETE] and the callback returns
** [SQLITE_IGNORE] then the [DELETE] operation proceeds but the
** [truncate optimization] is disabled and all rows are deleted individually.
**
** An authorizer is used when [sqlite3_prepare | preparing]
** SQL statements from an untrusted source, to ensure that the SQL statements
** do not try to access data they are not allowed to see, or that they do not
** try to execute malicious statements that damage the database.  For
** example, an application may allow a user to enter arbitrary
** SQL queries for evaluation by a database.  But the application does
** not want the user to be able to make arbitrary changes to the
** database.  An authorizer could then be put in place while the
** user-entered SQL is being [sqlite3_prepare | prepared] that
** disallows everything except [SELECT] statements.
**
** Applications that need to process SQL from untrusted sources
** might also consider lowering resource limits using [sqlite3_limit()]
** and limiting database size using the [max_page_count] [PRAGMA]
** in addition to using an authorizer.
**
** ^(Only a single authorizer can be in place on a database connection
** at a time.  Each call to sqlite3_set_authorizer overrides the
** previous call.)^  ^Disable the authorizer by installing a NULL callback.
** The authorizer is disabled by default.
**
** The authorizer callback must not do anything that will modify
** the database connection that invoked the authorizer callback.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^When [sqlite3_prepare_v2()] is used to prepare a statement, the
** statement might be re-prepared during [sqlite3_step()] due to a 
** schema change.  Hence, the application should ensure that the
** correct authorizer callback remains in place during the [sqlite3_step()].
**
** ^Note that the authorizer callback is invoked only during
** [sqlite3_prepare()] or its variants.  Authorization is not
** performed during statement evaluation in [sqlite3_step()], unless
** as stated in the previous paragraph, sqlite3_step() invokes
** sqlite3_prepare_v2() to reprepare a statement after a schema change.
*/
SQLITE_API int sqlite3_set_authorizer(
  sqlite3*,
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*),
  void *pUserData
);

/*
** CAPI3REF: Authorizer Return Codes
**
** The [sqlite3_set_authorizer | authorizer callback function] must
** return either [SQLITE_OK] or one of these two constants in order
** to signal SQLite whether or not the action is permitted.  See the
** [sqlite3_set_authorizer | authorizer documentation] for additional
** information.
**
** Note that SQLITE_IGNORE is also used as a [SQLITE_ROLLBACK | return code]
** from the [sqlite3_vtab_on_conflict()] interface.
*/
#define SQLITE_DENY   1   /* Abort the SQL statement with an error */
#define SQLITE_IGNORE 2   /* Don't allow access, but don't generate an error */

/*
** CAPI3REF: Authorizer Action Codes
**
** The [sqlite3_set_authorizer()] interface registers a callback function
** that is invoked to authorize certain SQL statement actions.  The
** second parameter to the callback is an integer code that specifies
** what action is being authorized.  These are the integer action codes that
** the authorizer callback may be passed.
**
** These action code values signify what kind of operation is to be
** authorized.  The 3rd and 4th parameters to the authorization
** callback function will be parameters or NULL depending on which of these
** codes is used as the second parameter.  ^(The 5th parameter to the
** authorizer callback is the name of the database ("main", "temp",
** etc.) if applicable.)^  ^The 6th parameter to the authorizer callback
** is the name of the inner-most trigger or view that is responsible for
** the access attempt or NULL if this access attempt is directly from
** top-level SQL code.
*/
/******************************************* 3rd ************ 4th ***********/
#define SQLITE_CREATE_INDEX          1   /* Index Name      Table Name      */
#define SQLITE_CREATE_TABLE          2   /* Table Name      NULL            */
#define SQLITE_CREATE_TEMP_INDEX     3   /* Index Name      Table Name      */
#define SQLITE_CREATE_TEMP_TABLE     4   /* Table Name      NULL            */
#define SQLITE_CREATE_TEMP_TRIGGER   5   /* Trigger Name    Table Name      */
#define SQLITE_CREATE_TEMP_VIEW      6   /* View Name       NULL            */
#define SQLITE_CREATE_TRIGGER        7   /* Trigger Name    Table Name      */
#define SQLITE_CREATE_VIEW           8   /* View Name       NULL            */
#define SQLITE_DELETE                9   /* Table Name      NULL            */
#define SQLITE_DROP_INDEX           10   /* Index Name      Table Name      */
#define SQLITE_DROP_TABLE           11   /* Table Name      NULL            */
#define SQLITE_DROP_TEMP_INDEX      12   /* Index Name      Table Name      */
#define SQLITE_DROP_TEMP_TABLE      13   /* Table Name      NULL            */
#define SQLITE_DROP_TEMP_TRIGGER    14   /* Trigger Name    Table Name      */
#define SQLITE_DROP_TEMP_VIEW       15   /* View Name       NULL            */
#define SQLITE_DROP_TRIGGER         16   /* Trigger Name    Table Name      */
#define SQLITE_DROP_VIEW            17   /* View Name       NULL            */
#define SQLITE_INSERT               18   /* Table Name      NULL            */
#define SQLITE_PRAGMA               19   /* Pragma Name     1st arg or NULL */
#define SQLITE_READ                 20   /* Table Name      Column Name     */
#define SQLITE_SELECT               21   /* NULL            NULL            */
#define SQLITE_TRANSACTION          22   /* Operation       NULL            */
#define SQLITE_UPDATE               23   /* Table Name      Column Name     */
#define SQLITE_ATTACH               24   /* Filename        NULL            */
#define SQLITE_DETACH               25   /* Database Name   NULL            */
#define SQLITE_ALTER_TABLE          26   /* Database Name   Table Name      */
#define SQLITE_REINDEX              27   /* Index Name      NULL            */
#define SQLITE_ANALYZE              28   /* Table Name      NULL            */
#define SQLITE_CREATE_VTABLE        29   /* Table Name      Module Name     */
#define SQLITE_DROP_VTABLE          30   /* Table Name      Module Name     */
#define SQLITE_FUNCTION             31   /* NULL            Function Name   */
#define SQLITE_SAVEPOINT            32   /* Operation       Savepoint Name  */
#define SQLITE_COPY                  0   /* No longer used */

/*
** CAPI3REF: Tracing And Profiling Functions
**
** These routines register callback functions that can be used for
** tracing and profiling the execution of SQL statements.
**
** ^The callback function registered by sqlite3_trace() is invoked at
** various times when an SQL statement is being run by [sqlite3_step()].
** ^The sqlite3_trace() callback is invoked with a UTF-8 rendering of the
** SQL statement text as the statement first begins executing.
** ^(Additional sqlite3_trace() callbacks might occur
** as each triggered subprogram is entered.  The callbacks for triggers
** contain a UTF-8 SQL comment that identifies the trigger.)^
**
** The [SQLITE_TRACE_SIZE_LIMIT] compile-time option can be used to limit
** the length of [bound parameter] expansion in the output of sqlite3_trace().
**
** ^The callback function registered by sqlite3_profile() is invoked
** as each SQL statement finishes.  ^The profile callback contains
** the original statement text and an estimate of wall-clock time
** of how long that statement took to run.  ^The profile callback
** time is in units of nanoseconds, however the current implementation
** is only capable of millisecond resolution so the six least significant
** digits in the time are meaningless.  Future versions of SQLite
** might provide greater resolution on the profiler callback.  The
** sqlite3_profile() function is considered experimental and is
** subject to change in future versions of SQLite.
*/
SQLITE_API void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*);
SQLITE_API SQLITE_EXPERIMENTAL void *sqlite3_profile(sqlite3*,
   void(*xProfile)(void*,const char*,sqlite3_uint64), void*);

/*
** CAPI3REF: Query Progress Callbacks
**
** ^The sqlite3_progress_handler(D,N,X,P) interface causes the callback
** function X to be invoked periodically during long running calls to
** [sqlite3_exec()], [sqlite3_step()] and [sqlite3_get_table()] for
** database connection D.  An example use for this
** interface is to keep a GUI updated during a large query.
**
** ^The parameter P is passed through as the only parameter to the 
** callback function X.  ^The parameter N is the approximate number of 
** [virtual machine instructions] that are evaluated between successive
** invocations of the callback X.  ^If N is less than one then the progress
** handler is disabled.
**
** ^Only a single progress handler may be defined at one time per
** [database connection]; setting a new progress handler cancels the
** old one.  ^Setting parameter X to NULL disables the progress handler.
** ^The progress handler is also disabled by setting N to a value less
** than 1.
**
** ^If the progress callback returns non-zero, the operation is
** interrupted.  This feature can be used to implement a
** "Cancel" button on a GUI progress dialog box.
**
** The progress handler callback must not do anything that will modify
** the database connection that invoked the progress handler.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
*/
SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);

/*
** CAPI3REF: Opening A New Database Connection
**
** ^These routines open an SQLite database file as specified by the 
** filename argument. ^The filename argument is interpreted as UTF-8 for
** sqlite3_open() and sqlite3_open_v2() and as UTF-16 in the native byte
** order for sqlite3_open16(). ^(A [database connection] handle is usually
** returned in *ppDb, even if an error occurs.  The only exception is that
** if SQLite is unable to allocate memory to hold the [sqlite3] object,
** a NULL will be written into *ppDb instead of a pointer to the [sqlite3]
** object.)^ ^(If the database is opened (and/or created) successfully, then
** [SQLITE_OK] is returned.  Otherwise an [error code] is returned.)^ ^The
** [sqlite3_errmsg()] or [sqlite3_errmsg16()] routines can be used to obtain
** an English language description of the error following a failure of any
** of the sqlite3_open() routines.
**
** ^The default encoding for the database will be UTF-8 if
** sqlite3_open() or sqlite3_open_v2() is called and
** UTF-16 in the native byte order if sqlite3_open16() is used.
**
** Whether or not an error occurs when it is opened, resources
** associated with the [database connection] handle should be released by
** passing it to [sqlite3_close()] when it is no longer required.
**
** The sqlite3_open_v2() interface works like sqlite3_open()
** except that it accepts two additional parameters for additional control
** over the new database connection.  ^(The flags parameter to
** sqlite3_open_v2() can take one of
** the following three values, optionally combined with the 
** [SQLITE_OPEN_NOMUTEX], [SQLITE_OPEN_FULLMUTEX], [SQLITE_OPEN_SHAREDCACHE],
** [SQLITE_OPEN_PRIVATECACHE], and/or [SQLITE_OPEN_URI] flags:)^
**
** <dl>
** ^(<dt>[SQLITE_OPEN_READONLY]</dt>
** <dd>The database is opened in read-only mode.  If the database does not
** already exist, an error is returned.</dd>)^
**
** ^(<dt>[SQLITE_OPEN_READWRITE]</dt>
** <dd>The database is opened for reading and writing if possible, or reading
** only if the file is write protected by the operating system.  In either
** case the database must already exist, otherwise an error is returned.</dd>)^
**
** ^(<dt>[SQLITE_OPEN_READWRITE] | [SQLITE_OPEN_CREATE]</dt>
** <dd>The database is opened for reading and writing, and is created if
** it does not already exist. This is the behavior that is always used for
** sqlite3_open() and sqlite3_open16().</dd>)^
** </dl>
**
** If the 3rd parameter to sqlite3_open_v2() is not one of the
** combinations shown above optionally combined with other
** [SQLITE_OPEN_READONLY | SQLITE_OPEN_* bits]
** then the behavior is undefined.
**
** ^If the [SQLITE_OPEN_NOMUTEX] flag is set, then the database connection
** opens in the multi-thread [threading mode] as long as the single-thread
** mode has not been set at compile-time or start-time.  ^If the
** [SQLITE_OPEN_FULLMUTEX] flag is set then the database connection opens
** in the serialized [threading mode] unless single-thread was
** previously selected at compile-time or start-time.
** ^The [SQLITE_OPEN_SHAREDCACHE] flag causes the database connection to be
** eligible to use [shared cache mode], regardless of whether or not shared
** cache is enabled using [sqlite3_enable_shared_cache()].  ^The
** [SQLITE_OPEN_PRIVATECACHE] flag causes the database connection to not
** participate in [shared cache mode] even if it is enabled.
**
** ^The fourth parameter to sqlite3_open_v2() is the name of the
** [sqlite3_vfs] object that defines the operating system interface that
** the new database connection should use.  ^If the fourth parameter is
** a NULL pointer then the default [sqlite3_vfs] object is used.
**
** ^If the filename is ":memory:", then a private, temporary in-memory database
** is created for the connection.  ^This in-memory database will vanish when
** the database connection is closed.  Future versions of SQLite might
** make use of additional special filenames that begin with the ":" character.
** It is recommended that when a database filename actually does begin with
** a ":" character you should prefix the filename with a pathname such as
** "./" to avoid ambiguity.
**
** ^If the filename is an empty string, then a private, temporary
** on-disk database will be created.  ^This private database will be
** automatically deleted as soon as the database connection is closed.
**
** [[URI filenames in sqlite3_open()]] <h3>URI Filenames</h3>
**
** ^If [URI filename] interpretation is enabled, and the filename argument
** begins with "file:", then the filename is interpreted as a URI. ^URI
** filename interpretation is enabled if the [SQLITE_OPEN_URI] flag is
** set in the fourth argument to sqlite3_open_v2(), or if it has
** been enabled globally using the [SQLITE_CONFIG_URI] option with the
** [sqlite3_config()] method or by the [SQLITE_USE_URI] compile-time option.
** As of SQLite version 3.7.7, URI filename interpretation is turned off
** by default, but future releases of SQLite might enable URI filename
** interpretation by default.  See "[URI filenames]" for additional
** information.
**
** URI filenames are parsed according to RFC 3986. ^If the URI contains an
** authority, then it must be either an empty string or the string 
** "localhost". ^If the authority is not an empty string or "localhost", an 
** error is returned to the caller. ^The fragment component of a URI, if 
** present, is ignored.
**
** ^SQLite uses the path component of the URI as the name of the disk file
** which contains the database. ^If the path begins with a '/' character, 
** then it is interpreted as an absolute path. ^If the path does not begin 
** with a '/' (meaning that the authority section is omitted from the URI)
** then the path is interpreted as a relative path. 
** ^On windows, the first component of an absolute path 
** is a drive specification (e.g. "C:").
**
** [[core URI query parameters]]
** The query component of a URI may contain parameters that are interpreted
** either by SQLite itself, or by a [VFS | custom VFS implementation].
** SQLite interprets the following three query parameters:
**
** <ul>
**   <li> <b>vfs</b>: ^The "vfs" parameter may be used to specify the name of
**     a VFS object that provides the operating system interface that should
**     be used to access the database file on disk. ^If this option is set to
**     an empty string the default VFS object is used. ^Specifying an unknown
**     VFS is an error. ^If sqlite3_open_v2() is used and the vfs option is
**     present, then the VFS specified by the option takes precedence over
**     the value passed as the fourth parameter to sqlite3_open_v2().
**
**   <li> <b>mode</b>: ^(The mode parameter may be set to either "ro", "rw",
**     "rwc", or "memory". Attempting to set it to any other value is
**     an error)^. 
**     ^If "ro" is specified, then the database is opened for read-only 
**     access, just as if the [SQLITE_OPEN_READONLY] flag had been set in the 
**     third argument to sqlite3_open_v2(). ^If the mode option is set to 
**     "rw", then the database is opened for read-write (but not create) 
**     access, as if SQLITE_OPEN_READWRITE (but not SQLITE_OPEN_CREATE) had 
**     been set. ^Value "rwc" is equivalent to setting both 
**     SQLITE_OPEN_READWRITE and SQLITE_OPEN_CREATE.  ^If the mode option is
**     set to "memory" then a pure [in-memory database] that never reads
**     or writes from disk is used. ^It is an error to specify a value for
**     the mode parameter that is less restrictive than that specified by
**     the flags passed in the third parameter to sqlite3_open_v2().
**
**   <li> <b>cache</b>: ^The cache parameter may be set to either "shared" or
**     "private". ^Setting it to "shared" is equivalent to setting the
**     SQLITE_OPEN_SHAREDCACHE bit in the flags argument passed to
**     sqlite3_open_v2(). ^Setting the cache parameter to "private" is 
**     equivalent to setting the SQLITE_OPEN_PRIVATECACHE bit.
**     ^If sqlite3_open_v2() is used and the "cache" parameter is present in
**     a URI filename, its value overrides any behavior requested by setting
**     SQLITE_OPEN_PRIVATECACHE or SQLITE_OPEN_SHAREDCACHE flag.
** </ul>
**
** ^Specifying an unknown parameter in the query component of a URI is not an
** error.  Future versions of SQLite might understand additional query
** parameters.  See "[query parameters with special meaning to SQLite]" for
** additional information.
**
** [[URI filename examples]] <h3>URI filename examples</h3>
**
** <table border="1" align=center cellpadding=5>
** <tr><th> URI filenames <th> Results
** <tr><td> file:data.db <td> 
**          Open the file "data.db" in the current directory.
** <tr><td> file:/home/fred/data.db<br>
**          file:///home/fred/data.db <br> 
**          file://localhost/home/fred/data.db <br> <td> 
**          Open the database file "/home/fred/data.db".
** <tr><td> file://darkstar/home/fred/data.db <td> 
**          An error. "darkstar" is not a recognized authority.
** <tr><td style="white-space:nowrap"> 
**          file:///C:/Documents%20and%20Settings/fred/Desktop/data.db
**     <td> Windows only: Open the file "data.db" on fred's desktop on drive
**          C:. Note that the %20 escaping in this example is not strictly 
**          necessary - space characters can be used literally
**          in URI filenames.
** <tr><td> file:data.db?mode=ro&cache=private <td> 
**          Open file "data.db" in the current directory for read-only access.
**          Regardless of whether or not shared-cache mode is enabled by
**          default, use a private cache.
** <tr><td> file:/home/fred/data.db?vfs=unix-nolock <td>
**          Open file "/home/fred/data.db". Use the special VFS "unix-nolock".
** <tr><td> file:data.db?mode=readonly <td> 
**          An error. "readonly" is not a valid option for the "mode" parameter.
** </table>
**
** ^URI hexadecimal escape sequences (%HH) are supported within the path and
** query components of a URI. A hexadecimal escape sequence consists of a
** percent sign - "%" - followed by exactly two hexadecimal digits 
** specifying an octet value. ^Before the path or query components of a
** URI filename are interpreted, they are encoded using UTF-8 and all 
** hexadecimal escape sequences replaced by a single byte containing the
** corresponding octet. If this process generates an invalid UTF-8 encoding,
** the results are undefined.
**
** <b>Note to Windows users:</b>  The encoding used for the filename argument
** of sqlite3_open() and sqlite3_open_v2() must be UTF-8, not whatever
** codepage is currently defined.  Filenames containing international
** characters must be converted to UTF-8 prior to passing them into
** sqlite3_open() or sqlite3_open_v2().
**
** <b>Note to Windows Runtime users:</b>  The temporary directory must be set
** prior to calling sqlite3_open() or sqlite3_open_v2().  Otherwise, various
** features that require the use of temporary files may fail.
**
** See also: [sqlite3_temp_directory]
*/
SQLITE_API int sqlite3_open(
  const char *filename,   /* Database filename (UTF-8) */
  sqlite3 **ppDb          /* OUT: SQLite db handle */
);
SQLITE_API int sqlite3_open16(
  const void *filename,   /* Database filename (UTF-16) */
  sqlite3 **ppDb          /* OUT: SQLite db handle */
);
SQLITE_API int sqlite3_open_v2(
  const char *filename,   /* Database filename (UTF-8) */
  sqlite3 **ppDb,         /* OUT: SQLite db handle */
  int flags,              /* Flags */
  const char *zVfs        /* Name of VFS module to use */
);

/*
** CAPI3REF: Obtain Values For URI Parameters
**
** These are utility routines, useful to VFS implementations, that check
** to see if a database file was a URI that contained a specific query 
** parameter, and if so obtains the value of that query parameter.
**
** If F is the database filename pointer passed into the xOpen() method of 
** a VFS implementation when the flags parameter to xOpen() has one or 
** more of the [SQLITE_OPEN_URI] or [SQLITE_OPEN_MAIN_DB] bits set and
** P is the name of the query parameter, then
** sqlite3_uri_parameter(F,P) returns the value of the P
** parameter if it exists or a NULL pointer if P does not appear as a 
** query parameter on F.  If P is a query parameter of F
** has no explicit value, then sqlite3_uri_parameter(F,P) returns
** a pointer to an empty string.
**
** The sqlite3_uri_boolean(F,P,B) routine assumes that P is a boolean
** parameter and returns true (1) or false (0) according to the value
** of P.  The sqlite3_uri_boolean(F,P,B) routine returns true (1) if the
** value of query parameter P is one of "yes", "true", or "on" in any
** case or if the value begins with a non-zero number.  The 
** sqlite3_uri_boolean(F,P,B) routines returns false (0) if the value of
** query parameter P is one of "no", "false", or "off" in any case or
** if the value begins with a numeric zero.  If P is not a query
** parameter on F or if the value of P is does not match any of the
** above, then sqlite3_uri_boolean(F,P,B) returns (B!=0).
**
** The sqlite3_uri_int64(F,P,D) routine converts the value of P into a
** 64-bit signed integer and returns that integer, or D if P does not
** exist.  If the value of P is something other than an integer, then
** zero is returned.
** 
** If F is a NULL pointer, then sqlite3_uri_parameter(F,P) returns NULL and
** sqlite3_uri_boolean(F,P,B) returns B.  If F is not a NULL pointer and
** is not a database file pathname pointer that SQLite passed into the xOpen
** VFS method, then the behavior of this routine is undefined and probably
** undesirable.
*/
SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam);
SQLITE_API int sqlite3_uri_boolean(const char *zFile, const char *zParam, int bDefault);
SQLITE_API sqlite3_int64 sqlite3_uri_int64(const char*, const char*, sqlite3_int64);


/*
** CAPI3REF: Error Codes And Messages
**
** ^The sqlite3_errcode() interface returns the numeric [result code] or
** [extended result code] for the most recent failed sqlite3_* API call
** associated with a [database connection]. If a prior API call failed
** but the most recent API call succeeded, the return value from
** sqlite3_errcode() is undefined.  ^The sqlite3_extended_errcode()
** interface is the same except that it always returns the 
** [extended result code] even when extended result codes are
** disabled.
**
** ^The sqlite3_errmsg() and sqlite3_errmsg16() return English-language
** text that describes the error, as either UTF-8 or UTF-16 respectively.
** ^(Memory to hold the error message string is managed internally.
** The application does not need to worry about freeing the result.
** However, the error string might be overwritten or deallocated by
** subsequent calls to other SQLite interface functions.)^
**
** ^The sqlite3_errstr() interface returns the English-language text
** that describes the [result code], as UTF-8.
** ^(Memory to hold the error message string is managed internally
** and must not be freed by the application)^.
**
** When the serialized [threading mode] is in use, it might be the
** case that a second error occurs on a separate thread in between
** the time of the first error and the call to these interfaces.
** When that happens, the second error will be reported since these
** interfaces always report the most recent result.  To avoid
** this, each thread can obtain exclusive use of the [database connection] D
** by invoking [sqlite3_mutex_enter]([sqlite3_db_mutex](D)) before beginning
** to use D and invoking [sqlite3_mutex_leave]([sqlite3_db_mutex](D)) after
** all calls to the interfaces listed here are completed.
**
** If an interface fails with SQLITE_MISUSE, that means the interface
** was invoked incorrectly by the application.  In that case, the
** error code and message may or may not be set.
*/
SQLITE_API int sqlite3_errcode(sqlite3 *db);
SQLITE_API int sqlite3_extended_errcode(sqlite3 *db);
SQLITE_API const char *sqlite3_errmsg(sqlite3*);
SQLITE_API const void *sqlite3_errmsg16(sqlite3*);
SQLITE_API const char *sqlite3_errstr(int);

/*
** CAPI3REF: SQL Statement Object
** KEYWORDS: {prepared statement} {prepared statements}
**
** An instance of this object represents a single SQL statement.
** This object is variously known as a "prepared statement" or a
** "compiled SQL statement" or simply as a "statement".
**
** The life of a statement object goes something like this:
**
** <ol>
** <li> Create the object using [sqlite3_prepare_v2()] or a related
**      function.
** <li> Bind values to [host parameters] using the sqlite3_bind_*()
**      interfaces.
** <li> Run the SQL by calling [sqlite3_step()] one or more times.
** <li> Reset the statement using [sqlite3_reset()] then go back
**      to step 2.  Do this zero or more times.
** <li> Destroy the object using [sqlite3_finalize()].
** </ol>
**
** Refer to documentation on individual methods above for additional
** information.
*/
typedef struct sqlite3_stmt sqlite3_stmt;

/*
** CAPI3REF: Run-time Limits
**
** ^(This interface allows the size of various constructs to be limited
** on a connection by connection basis.  The first parameter is the
** [database connection] whose limit is to be set or queried.  The
** second parameter is one of the [limit categories] that define a
** class of constructs to be size limited.  The third parameter is the
** new limit for that construct.)^
**
** ^If the new limit is a negative number, the limit is unchanged.
** ^(For each limit category SQLITE_LIMIT_<i>NAME</i> there is a 
** [limits | hard upper bound]
** set at compile-time by a C preprocessor macro called
** [limits | SQLITE_MAX_<i>NAME</i>].
** (The "_LIMIT_" in the name is changed to "_MAX_".))^
** ^Attempts to increase a limit above its hard upper bound are
** silently truncated to the hard upper bound.
**
** ^Regardless of whether or not the limit was changed, the 
** [sqlite3_limit()] interface returns the prior value of the limit.
** ^Hence, to find the current value of a limit without changing it,
** simply invoke this interface with the third parameter set to -1.
**
** Run-time limits are intended for use in applications that manage
** both their own internal database and also databases that are controlled
** by untrusted external sources.  An example application might be a
** web browser that has its own databases for storing history and
** separate databases controlled by JavaScript applications downloaded
** off the Internet.  The internal databases can be given the
** large, default limits.  Databases managed by external sources can
** be given much smaller limits designed to prevent a denial of service
** attack.  Developers might also want to use the [sqlite3_set_authorizer()]
** interface to further control untrusted SQL.  The size of the database
** created by an untrusted script can be contained using the
** [max_page_count] [PRAGMA].
**
** New run-time limit categories may be added in future releases.
*/
SQLITE_API int sqlite3_limit(sqlite3*, int id, int newVal);

/*
** CAPI3REF: Run-Time Limit Categories
** KEYWORDS: {limit category} {*limit categories}
**
** These constants define various performance limits
** that can be lowered at run-time using [sqlite3_limit()].
** The synopsis of the meanings of the various limits is shown below.
** Additional information is available at [limits | Limits in SQLite].
**
** <dl>
** [[SQLITE_LIMIT_LENGTH]] ^(<dt>SQLITE_LIMIT_LENGTH</dt>
** <dd>The maximum size of any string or BLOB or table row, in bytes.<dd>)^
**
** [[SQLITE_LIMIT_SQL_LENGTH]] ^(<dt>SQLITE_LIMIT_SQL_LENGTH</dt>
** <dd>The maximum length of an SQL statement, in bytes.</dd>)^
**
** [[SQLITE_LIMIT_COLUMN]] ^(<dt>SQLITE_LIMIT_COLUMN</dt>
** <dd>The maximum number of columns in a table definition or in the
** result set of a [SELECT] or the maximum number of columns in an index
** or in an ORDER BY or GROUP BY clause.</dd>)^
**
** [[SQLITE_LIMIT_EXPR_DEPTH]] ^(<dt>SQLITE_LIMIT_EXPR_DEPTH</dt>
** <dd>The maximum depth of the parse tree on any expression.</dd>)^
**
** [[SQLITE_LIMIT_COMPOUND_SELECT]] ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt>
** <dd>The maximum number of terms in a compound SELECT statement.</dd>)^
**
** [[SQLITE_LIMIT_VDBE_OP]] ^(<dt>SQLITE_LIMIT_VDBE_OP</dt>
** <dd>The maximum number of instructions in a virtual machine program
** used to implement an SQL statement.  This limit is not currently
** enforced, though that might be added in some future release of
** SQLite.</dd>)^
**
** [[SQLITE_LIMIT_FUNCTION_ARG]] ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt>
** <dd>The maximum number of arguments on a function.</dd>)^
**
** [[SQLITE_LIMIT_ATTACHED]] ^(<dt>SQLITE_LIMIT_ATTACHED</dt>
** <dd>The maximum number of [ATTACH | attached databases].)^</dd>
**
** [[SQLITE_LIMIT_LIKE_PATTERN_LENGTH]]
** ^(<dt>SQLITE_LIMIT_LIKE_PATTERN_LENGTH</dt>
** <dd>The maximum length of the pattern argument to the [LIKE] or
** [GLOB] operators.</dd>)^
**
** [[SQLITE_LIMIT_VARIABLE_NUMBER]]
** ^(<dt>SQLITE_LIMIT_VARIABLE_NUMBER</dt>
** <dd>The maximum index number of any [parameter] in an SQL statement.)^
**
** [[SQLITE_LIMIT_TRIGGER_DEPTH]] ^(<dt>SQLITE_LIMIT_TRIGGER_DEPTH</dt>
** <dd>The maximum depth of recursion for triggers.</dd>)^
** </dl>
*/
#define SQLITE_LIMIT_LENGTH                    0
#define SQLITE_LIMIT_SQL_LENGTH                1
#define SQLITE_LIMIT_COLUMN                    2
#define SQLITE_LIMIT_EXPR_DEPTH                3
#define SQLITE_LIMIT_COMPOUND_SELECT           4
#define SQLITE_LIMIT_VDBE_OP                   5
#define SQLITE_LIMIT_FUNCTION_ARG              6
#define SQLITE_LIMIT_ATTACHED                  7
#define SQLITE_LIMIT_LIKE_PATTERN_LENGTH       8
#define SQLITE_LIMIT_VARIABLE_NUMBER           9
#define SQLITE_LIMIT_TRIGGER_DEPTH            10

/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
**
** To execute an SQL query, it must first be compiled into a byte-code
** program using one of these routines.
**
** The first argument, "db", is a [database connection] obtained from a
** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
** [sqlite3_open16()].  The database connection must not have been closed.
**
** The second argument, "zSql", is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare() and sqlite3_prepare_v2()
** interfaces use UTF-8, and sqlite3_prepare16() and sqlite3_prepare16_v2()
** use UTF-16.
**
** ^If the nByte argument is less than zero, then zSql is read up to the
** first zero terminator. ^If nByte is non-negative, then it is the maximum
** number of  bytes read from zSql.  ^When nByte is non-negative, the
** zSql string ends at either the first '\000' or '\u0000' character or
** the nByte-th byte, whichever comes first. If the caller knows
** that the supplied string is nul-terminated, then there is a small
** performance advantage to be gained by passing an nByte parameter that
** is equal to the number of bytes in the input string <i>including</i>
** the nul-terminator bytes as this saves SQLite from having to
** make a copy of the input string.
**
** ^If pzTail is not NULL then *pzTail is made to point to the first byte
** past the end of the first SQL statement in zSql.  These routines only
** compile the first statement in zSql, so *pzTail is left pointing to
** what remains uncompiled.
**
** ^*ppStmt is left pointing to a compiled [prepared statement] that can be
** executed using [sqlite3_step()].  ^If there is an error, *ppStmt is set
** to NULL.  ^If the input text contains no SQL (if the input is an empty
** string or a comment) then *ppStmt is set to NULL.
** The calling procedure is responsible for deleting the compiled
** SQL statement using [sqlite3_finalize()] after it has finished with it.
** ppStmt may not be NULL.
**
** ^On success, the sqlite3_prepare() family of routines return [SQLITE_OK];
** otherwise an [error code] is returned.
**
** The sqlite3_prepare_v2() and sqlite3_prepare16_v2() interfaces are
** recommended for all new programs. The two older interfaces are retained
** for backwards compatibility, but their use is discouraged.
** ^In the "v2" interfaces, the prepared statement
** that is returned (the [sqlite3_stmt] object) contains a copy of the
** original SQL text. This causes the [sqlite3_step()] interface to
** behave differently in three ways:
**
** <ol>
** <li>
** ^If the database schema changes, instead of returning [SQLITE_SCHEMA] as it
** always used to do, [sqlite3_step()] will automatically recompile the SQL
** statement and try to run it again. As many as [SQLITE_MAX_SCHEMA_RETRY]
** retries will occur before sqlite3_step() gives up and returns an error.
** </li>
**
** <li>
** ^When an error occurs, [sqlite3_step()] will return one of the detailed
** [error codes] or [extended error codes].  ^The legacy behavior was that
** [sqlite3_step()] would only return a generic [SQLITE_ERROR] result code
** and the application would have to make a second call to [sqlite3_reset()]
** in order to find the underlying cause of the problem. With the "v2" prepare
** interfaces, the underlying reason for the error is returned immediately.
** </li>
**
** <li>
** ^If the specific value bound to [parameter | host parameter] in the 
** WHERE clause might influence the choice of query plan for a statement,
** then the statement will be automatically recompiled, as if there had been 
** a schema change, on the first  [sqlite3_step()] call following any change
** to the [sqlite3_bind_text | bindings] of that [parameter]. 
** ^The specific value of WHERE-clause [parameter] might influence the 
** choice of query plan if the parameter is the left-hand side of a [LIKE]
** or [GLOB] operator or if the parameter is compared to an indexed column
** and the [SQLITE_ENABLE_STAT3] compile-time option is enabled.
** </li>
** </ol>
*/
SQLITE_API int sqlite3_prepare(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare_v2(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16_v2(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);

/*
** CAPI3REF: Retrieving Statement SQL
**
** ^This interface can be used to retrieve a saved copy of the original
** SQL text used to create a [prepared statement] if that statement was
** compiled using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()].
*/
SQLITE_API const char *sqlite3_sql(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Determine If An SQL Statement Writes The Database
**
** ^The sqlite3_stmt_readonly(X) interface returns true (non-zero) if
** and only if the [prepared statement] X makes no direct changes to
** the content of the database file.
**
** Note that [application-defined SQL functions] or
** [virtual tables] might change the database indirectly as a side effect.  
** ^(For example, if an application defines a function "eval()" that 
** calls [sqlite3_exec()], then the following SQL statement would
** change the database file through side-effects:
**
** <blockquote><pre>
**    SELECT eval('DELETE FROM t1') FROM t2;
** </pre></blockquote>
**
** But because the [SELECT] statement does not change the database file
** directly, sqlite3_stmt_readonly() would still return true.)^
**
** ^Transaction control statements such as [BEGIN], [COMMIT], [ROLLBACK],
** [SAVEPOINT], and [RELEASE] cause sqlite3_stmt_readonly() to return true,
** since the statements themselves do not actually modify the database but
** rather they control the timing of when other statements modify the 
** database.  ^The [ATTACH] and [DETACH] statements also cause
** sqlite3_stmt_readonly() to return true since, while those statements
** change the configuration of a database connection, they do not make 
** changes to the content of the database files on disk.
*/
SQLITE_API int sqlite3_stmt_readonly(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Determine If A Prepared Statement Has Been Reset
**
** ^The sqlite3_stmt_busy(S) interface returns true (non-zero) if the
** [prepared statement] S has been stepped at least once using 
** [sqlite3_step(S)] but has not run to completion and/or has not 
** been reset using [sqlite3_reset(S)].  ^The sqlite3_stmt_busy(S)
** interface returns false if S is a NULL pointer.  If S is not a 
** NULL pointer and is not a pointer to a valid [prepared statement]
** object, then the behavior is undefined and probably undesirable.
**
** This interface can be used in combination [sqlite3_next_stmt()]
** to locate all prepared statements associated with a database 
** connection that are in need of being reset.  This can be used,
** for example, in diagnostic routines to search for prepared 
** statements that are holding a transaction open.
*/
SQLITE_API int sqlite3_stmt_busy(sqlite3_stmt*);

/*
** CAPI3REF: Dynamically Typed Value Object
** KEYWORDS: {protected sqlite3_value} {unprotected sqlite3_value}
**
** SQLite uses the sqlite3_value object to represent all values
** that can be stored in a database table. SQLite uses dynamic typing
** for the values it stores.  ^Values stored in sqlite3_value objects
** can be integers, floating point values, strings, BLOBs, or NULL.
**
** An sqlite3_value object may be either "protected" or "unprotected".
** Some interfaces require a protected sqlite3_value.  Other interfaces
** will accept either a protected or an unprotected sqlite3_value.
** Every interface that accepts sqlite3_value arguments specifies
** whether or not it requires a protected sqlite3_value.
**
** The terms "protected" and "unprotected" refer to whether or not
** a mutex is held.  An internal mutex is held for a protected
** sqlite3_value object but no mutex is held for an unprotected
** sqlite3_value object.  If SQLite is compiled to be single-threaded
** (with [SQLITE_THREADSAFE=0] and with [sqlite3_threadsafe()] returning 0)
** or if SQLite is run in one of reduced mutex modes 
** [SQLITE_CONFIG_SINGLETHREAD] or [SQLITE_CONFIG_MULTITHREAD]
** then there is no distinction between protected and unprotected
** sqlite3_value objects and they can be used interchangeably.  However,
** for maximum code portability it is recommended that applications
** still make the distinction between protected and unprotected
** sqlite3_value objects even when not strictly required.
**
** ^The sqlite3_value objects that are passed as parameters into the
** implementation of [application-defined SQL functions] are protected.
** ^The sqlite3_value object returned by
** [sqlite3_column_value()] is unprotected.
** Unprotected sqlite3_value objects may only be used with
** [sqlite3_result_value()] and [sqlite3_bind_value()].
** The [sqlite3_value_blob | sqlite3_value_type()] family of
** interfaces require protected sqlite3_value objects.
*/
typedef struct Mem sqlite3_value;

/*
** CAPI3REF: SQL Function Context Object
**
** The context in which an SQL function executes is stored in an
** sqlite3_context object.  ^A pointer to an sqlite3_context object
** is always first parameter to [application-defined SQL functions].
** The application-defined SQL function implementation will pass this
** pointer through into calls to [sqlite3_result_int | sqlite3_result()],
** [sqlite3_aggregate_context()], [sqlite3_user_data()],
** [sqlite3_context_db_handle()], [sqlite3_get_auxdata()],
** and/or [sqlite3_set_auxdata()].
*/
typedef struct sqlite3_context sqlite3_context;

/*
** CAPI3REF: Binding Values To Prepared Statements
** KEYWORDS: {host parameter} {host parameters} {host parameter name}
** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}
**
** ^(In the SQL statement text input to [sqlite3_prepare_v2()] and its variants,
** literals may be replaced by a [parameter] that matches one of following
** templates:
**
** <ul>
** <li>  ?
** <li>  ?NNN
** <li>  :VVV
** <li>  @VVV
** <li>  $VVV
** </ul>
**
** In the templates above, NNN represents an integer literal,
** and VVV represents an alphanumeric identifier.)^  ^The values of these
** parameters (also called "host parameter names" or "SQL parameters")
** can be set using the sqlite3_bind_*() routines defined here.
**
** ^The first argument to the sqlite3_bind_*() routines is always
** a pointer to the [sqlite3_stmt] object returned from
** [sqlite3_prepare_v2()] or its variants.
**
** ^The second argument is the index of the SQL parameter to be set.
** ^The leftmost SQL parameter has an index of 1.  ^When the same named
** SQL parameter is used more than once, second and subsequent
** occurrences have the same index as the first occurrence.
** ^The index for named parameters can be looked up using the
** [sqlite3_bind_parameter_index()] API if desired.  ^The index
** for "?NNN" parameters is the value of NNN.
** ^The NNN value must be between 1 and the [sqlite3_limit()]
** parameter [SQLITE_LIMIT_VARIABLE_NUMBER] (default value: 999).
**
** ^The third argument is the value to bind to the parameter.
** ^If the third parameter to sqlite3_bind_text() or sqlite3_bind_text16()
** or sqlite3_bind_blob() is a NULL pointer then the fourth parameter
** is ignored and the end result is the same as sqlite3_bind_null().
**
** ^(In those routines that have a fourth argument, its value is the
** number of bytes in the parameter.  To be clear: the value is the
** number of <u>bytes</u> in the value, not the number of characters.)^
** ^If the fourth parameter to sqlite3_bind_text() or sqlite3_bind_text16()
** is negative, then the length of the string is
** the number of bytes up to the first zero terminator.
** If the fourth parameter to sqlite3_bind_blob() is negative, then
** the behavior is undefined.
** If a non-negative fourth parameter is provided to sqlite3_bind_text()
** or sqlite3_bind_text16() then that parameter must be the byte offset
** where the NUL terminator would occur assuming the string were NUL
** terminated.  If any NUL characters occur at byte offsets less than 
** the value of the fourth parameter then the resulting string value will
** contain embedded NULs.  The result of expressions involving strings
** with embedded NULs is undefined.
**
** ^The fifth argument to sqlite3_bind_blob(), sqlite3_bind_text(), and
** sqlite3_bind_text16() is a destructor used to dispose of the BLOB or
** string after SQLite has finished with it.  ^The destructor is called
** to dispose of the BLOB or string even if the call to sqlite3_bind_blob(),
** sqlite3_bind_text(), or sqlite3_bind_text16() fails.  
** ^If the fifth argument is
** the special value [SQLITE_STATIC], then SQLite assumes that the
** information is in static, unmanaged space and does not need to be freed.
** ^If the fifth argument has the value [SQLITE_TRANSIENT], then
** SQLite makes its own private copy of the data immediately, before
** the sqlite3_bind_*() routine returns.
**
** ^The sqlite3_bind_zeroblob() routine binds a BLOB of length N that
** is filled with zeroes.  ^A zeroblob uses a fixed amount of memory
** (just an integer to hold its size) while it is being processed.
** Zeroblobs are intended to serve as placeholders for BLOBs whose
** content is later written using
** [sqlite3_blob_open | incremental BLOB I/O] routines.
** ^A negative value for the zeroblob results in a zero-length BLOB.
**
** ^If any of the sqlite3_bind_*() routines are called with a NULL pointer
** for the [prepared statement] or with a prepared statement for which
** [sqlite3_step()] has been called more recently than [sqlite3_reset()],
** then the call will return [SQLITE_MISUSE].  If any sqlite3_bind_()
** routine is passed a [prepared statement] that has been finalized, the
** result is undefined and probably harmful.
**
** ^Bindings are not cleared by the [sqlite3_reset()] routine.
** ^Unbound parameters are interpreted as NULL.
**
** ^The sqlite3_bind_* routines return [SQLITE_OK] on success or an
** [error code] if anything goes wrong.
** ^[SQLITE_RANGE] is returned if the parameter
** index is out of range.  ^[SQLITE_NOMEM] is returned if malloc() fails.
**
** See also: [sqlite3_bind_parameter_count()],
** [sqlite3_bind_parameter_name()], and [sqlite3_bind_parameter_index()].
*/
SQLITE_API int sqlite3_bind_blob(sqlite3_stmt*, int, const void*, int n, void(*)(void*));
SQLITE_API int sqlite3_bind_double(sqlite3_stmt*, int, double);
SQLITE_API int sqlite3_bind_int(sqlite3_stmt*, int, int);
SQLITE_API int sqlite3_bind_int64(sqlite3_stmt*, int, sqlite3_int64);
SQLITE_API int sqlite3_bind_null(sqlite3_stmt*, int);
SQLITE_API int sqlite3_bind_text(sqlite3_stmt*, int, const char*, int n, void(*)(void*));
SQLITE_API int sqlite3_bind_text16(sqlite3_stmt*, int, const void*, int, void(*)(void*));
SQLITE_API int sqlite3_bind_value(sqlite3_stmt*, int, const sqlite3_value*);
SQLITE_API int sqlite3_bind_zeroblob(sqlite3_stmt*, int, int n);

/*
** CAPI3REF: Number Of SQL Parameters
**
** ^This routine can be used to find the number of [SQL parameters]
** in a [prepared statement].  SQL parameters are tokens of the
** form "?", "?NNN", ":AAA", "$AAA", or "@AAA" that serve as
** placeholders for values that are [sqlite3_bind_blob | bound]
** to the parameters at a later time.
**
** ^(This routine actually returns the index of the largest (rightmost)
** parameter. For all forms except ?NNN, this will correspond to the
** number of unique parameters.  If parameters of the ?NNN form are used,
** there may be gaps in the list.)^
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_name()], and
** [sqlite3_bind_parameter_index()].
*/
SQLITE_API int sqlite3_bind_parameter_count(sqlite3_stmt*);

/*
** CAPI3REF: Name Of A Host Parameter
**
** ^The sqlite3_bind_parameter_name(P,N) interface returns
** the name of the N-th [SQL parameter] in the [prepared statement] P.
** ^(SQL parameters of the form "?NNN" or ":AAA" or "@AAA" or "$AAA"
** have a name which is the string "?NNN" or ":AAA" or "@AAA" or "$AAA"
** respectively.
** In other words, the initial ":" or "$" or "@" or "?"
** is included as part of the name.)^
** ^Parameters of the form "?" without a following integer have no name
** and are referred to as "nameless" or "anonymous parameters".
**
** ^The first host parameter has an index of 1, not 0.
**
** ^If the value N is out of range or if the N-th parameter is
** nameless, then NULL is returned.  ^The returned string is
** always in UTF-8 encoding even if the named parameter was
** originally specified as UTF-16 in [sqlite3_prepare16()] or
** [sqlite3_prepare16_v2()].
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
SQLITE_API const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);

/*
** CAPI3REF: Index Of A Parameter With A Given Name
**
** ^Return the index of an SQL parameter given its name.  ^The
** index value returned is suitable for use as the second
** parameter to [sqlite3_bind_blob|sqlite3_bind()].  ^A zero
** is returned if no matching parameter is found.  ^The parameter
** name must be given in UTF-8 even if the original statement
** was prepared from UTF-16 text using [sqlite3_prepare16_v2()].
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
SQLITE_API int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);

/*
** CAPI3REF: Reset All Bindings On A Prepared Statement
**
** ^Contrary to the intuition of many, [sqlite3_reset()] does not reset
** the [sqlite3_bind_blob | bindings] on a [prepared statement].
** ^Use this routine to reset all host parameters to NULL.
*/
SQLITE_API int sqlite3_clear_bindings(sqlite3_stmt*);

/*
** CAPI3REF: Number Of Columns In A Result Set
**
** ^Return the number of columns in the result set returned by the
** [prepared statement]. ^This routine returns 0 if pStmt is an SQL
** statement that does not return data (for example an [UPDATE]).
**
** See also: [sqlite3_data_count()]
*/
SQLITE_API int sqlite3_column_count(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Column Names In A Result Set
**
** ^These routines return the name assigned to a particular column
** in the result set of a [SELECT] statement.  ^The sqlite3_column_name()
** interface returns a pointer to a zero-terminated UTF-8 string
** and sqlite3_column_name16() returns a pointer to a zero-terminated
** UTF-16 string.  ^The first parameter is the [prepared statement]
** that implements the [SELECT] statement. ^The second parameter is the
** column number.  ^The leftmost column is number 0.
**
** ^The returned string pointer is valid until either the [prepared statement]
** is destroyed by [sqlite3_finalize()] or until the statement is automatically
** reprepared by the first call to [sqlite3_step()] for a particular run
** or until the next call to
** sqlite3_column_name() or sqlite3_column_name16() on the same column.
**
** ^If sqlite3_malloc() fails during the processing of either routine
** (for example during a conversion from UTF-8 to UTF-16) then a
** NULL pointer is returned.
**
** ^The name of a result column is the value of the "AS" clause for
** that column, if there is an AS clause.  If there is no AS clause
** then the name of the column is unspecified and may change from
** one release of SQLite to the next.
*/
SQLITE_API const char *sqlite3_column_name(sqlite3_stmt*, int N);
SQLITE_API const void *sqlite3_column_name16(sqlite3_stmt*, int N);

/*
** CAPI3REF: Source Of Data In A Query Result
**
** ^These routines provide a means to determine the database, table, and
** table column that is the origin of a particular result column in
** [SELECT] statement.
** ^The name of the database or table or column can be returned as
** either a UTF-8 or UTF-16 string.  ^The _database_ routines return
** the database name, the _table_ routines return the table name, and
** the origin_ routines return the column name.
** ^The returned string is valid until the [prepared statement] is destroyed
** using [sqlite3_finalize()] or until the statement is automatically
** reprepared by the first call to [sqlite3_step()] for a particular run
** or until the same information is requested
** again in a different encoding.
**
** ^The names returned are the original un-aliased names of the
** database, table, and column.
**
** ^The first argument to these interfaces is a [prepared statement].
** ^These functions return information about the Nth result column returned by
** the statement, where N is the second function argument.
** ^The left-most column is column 0 for these routines.
**
** ^If the Nth column returned by the statement is an expression or
** subquery and is not a column value, then all of these functions return
** NULL.  ^These routine might also return NULL if a memory allocation error
** occurs.  ^Otherwise, they return the name of the attached database, table,
** or column that query result column was extracted from.
**
** ^As with all other SQLite APIs, those whose names end with "16" return
** UTF-16 encoded strings and the other functions return UTF-8.
**
** ^These APIs are only available if the library was compiled with the
** [SQLITE_ENABLE_COLUMN_METADATA] C-preprocessor symbol.
**
** If two or more threads call one or more of these routines against the same
** prepared statement and column at the same time then the results are
** undefined.
**
** If two or more threads call one or more
** [sqlite3_column_database_name | column metadata interfaces]
** for the same [prepared statement] and result column
** at the same time then the results are undefined.
*/
SQLITE_API const char *sqlite3_column_database_name(sqlite3_stmt*,int);
SQLITE_API const void *sqlite3_column_database_name16(sqlite3_stmt*,int);
SQLITE_API const char *sqlite3_column_table_name(sqlite3_stmt*,int);
SQLITE_API const void *sqlite3_column_table_name16(sqlite3_stmt*,int);
SQLITE_API const char *sqlite3_column_origin_name(sqlite3_stmt*,int);
SQLITE_API const void *sqlite3_column_origin_name16(sqlite3_stmt*,int);

/*
** CAPI3REF: Declared Datatype Of A Query Result
**
** ^(The first parameter is a [prepared statement].
** If this statement is a [SELECT] statement and the Nth column of the
** returned result set of that [SELECT] is a table column (not an
** expression or subquery) then the declared type of the table
** column is returned.)^  ^If the Nth column of the result set is an
** expression or subquery, then a NULL pointer is returned.
** ^The returned string is always UTF-8 encoded.
**
** ^(For example, given the database schema:
**
** CREATE TABLE t1(c1 VARIANT);
**
** and the following statement to be compiled:
**
** SELECT c1 + 1, c1 FROM t1;
**
** this routine would return the string "VARIANT" for the second result
** column (i==1), and a NULL pointer for the first result column (i==0).)^
**
** ^SQLite uses dynamic run-time typing.  ^So just because a column
** is declared to contain a particular type does not mean that the
** data stored in that column is of the declared type.  SQLite is
** strongly typed, but the typing is dynamic not static.  ^Type
** is associated with individual values, not with the containers
** used to hold those values.
*/
SQLITE_API const char *sqlite3_column_decltype(sqlite3_stmt*,int);
SQLITE_API const void *sqlite3_column_decltype16(sqlite3_stmt*,int);

/*
** CAPI3REF: Evaluate An SQL Statement
**
** After a [prepared statement] has been prepared using either
** [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] or one of the legacy
** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this function
** must be called one or more times to evaluate the statement.
**
** The details of the behavior of the sqlite3_step() interface depend
** on whether the statement was prepared using the newer "v2" interface
** [sqlite3_prepare_v2()] and [sqlite3_prepare16_v2()] or the older legacy
** interface [sqlite3_prepare()] and [sqlite3_prepare16()].  The use of the
** new "v2" interface is recommended for new applications but the legacy
** interface will continue to be supported.
**
** ^In the legacy interface, the return value will be either [SQLITE_BUSY],
** [SQLITE_DONE], [SQLITE_ROW], [SQLITE_ERROR], or [SQLITE_MISUSE].
** ^With the "v2" interface, any of the other [result codes] or
** [extended result codes] might be returned as well.
**
** ^[SQLITE_BUSY] means that the database engine was unable to acquire the
** database locks it needs to do its job.  ^If the statement is a [COMMIT]
** or occurs outside of an explicit transaction, then you can retry the
** statement.  If the statement is not a [COMMIT] and occurs within an
** explicit transaction then you should rollback the transaction before
** continuing.
**
** ^[SQLITE_DONE] means that the statement has finished executing
** successfully.  sqlite3_step() should not be called again on this virtual
** machine without first calling [sqlite3_reset()] to reset the virtual
** machine back to its initial state.
**
** ^If the SQL statement being executed returns any data, then [SQLITE_ROW]
** is returned each time a new row of data is ready for processing by the
** caller. The values may be accessed using the [column access functions].
** sqlite3_step() is called again to retrieve the next row of data.
**
** ^[SQLITE_ERROR] means that a run-time error (such as a constraint
** violation) has occurred.  sqlite3_step() should not be called again on
** the VM. More information may be found by calling [sqlite3_errmsg()].
** ^With the legacy interface, a more specific error code (for example,
** [SQLITE_INTERRUPT], [SQLITE_SCHEMA], [SQLITE_CORRUPT], and so forth)
** can be obtained by calling [sqlite3_reset()] on the
** [prepared statement].  ^In the "v2" interface,
** the more specific error code is returned directly by sqlite3_step().
**
** [SQLITE_MISUSE] means that the this routine was called inappropriately.
** Perhaps it was called on a [prepared statement] that has
** already been [sqlite3_finalize | finalized] or on one that had
** previously returned [SQLITE_ERROR] or [SQLITE_DONE].  Or it could
** be the case that the same database connection is being used by two or
** more threads at the same moment in time.
**
** For all versions of SQLite up to and including 3.6.23.1, a call to
** [sqlite3_reset()] was required after sqlite3_step() returned anything
** other than [SQLITE_ROW] before any subsequent invocation of
** sqlite3_step().  Failure to reset the prepared statement using 
** [sqlite3_reset()] would result in an [SQLITE_MISUSE] return from
** sqlite3_step().  But after version 3.6.23.1, sqlite3_step() began
** calling [sqlite3_reset()] automatically in this circumstance rather
** than returning [SQLITE_MISUSE].  This is not considered a compatibility
** break because any application that ever receives an SQLITE_MISUSE error
** is broken by definition.  The [SQLITE_OMIT_AUTORESET] compile-time option
** can be used to restore the legacy behavior.
**
** <b>Goofy Interface Alert:</b> In the legacy interface, the sqlite3_step()
** API always returns a generic error code, [SQLITE_ERROR], following any
** error other than [SQLITE_BUSY] and [SQLITE_MISUSE].  You must call
** [sqlite3_reset()] or [sqlite3_finalize()] in order to find one of the
** specific [error codes] that better describes the error.
** We admit that this is a goofy design.  The problem has been fixed
** with the "v2" interface.  If you prepare all of your SQL statements
** using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] instead
** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()] interfaces,
** then the more specific [error codes] are returned directly
** by sqlite3_step().  The use of the "v2" interface is recommended.
*/
SQLITE_API int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF: Number of columns in a result set
**
** ^The sqlite3_data_count(P) interface returns the number of columns in the
** current row of the result set of [prepared statement] P.
** ^If prepared statement P does not have results ready to return
** (via calls to the [sqlite3_column_int | sqlite3_column_*()] of
** interfaces) then sqlite3_data_count(P) returns 0.
** ^The sqlite3_data_count(P) routine also returns 0 if P is a NULL pointer.
** ^The sqlite3_data_count(P) routine returns 0 if the previous call to
** [sqlite3_step](P) returned [SQLITE_DONE].  ^The sqlite3_data_count(P)
** will return non-zero if previous call to [sqlite3_step](P) returned
** [SQLITE_ROW], except in the case of the [PRAGMA incremental_vacuum]
** where it always returns zero since each step of that multi-step
** pragma returns 0 columns of data.
**
** See also: [sqlite3_column_count()]
*/
SQLITE_API int sqlite3_data_count(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Fundamental Datatypes
** KEYWORDS: SQLITE_TEXT
**
** ^(Every value in SQLite has one of five fundamental datatypes:
**
** <ul>
** <li> 64-bit signed integer
** <li> 64-bit IEEE floating point number
** <li> string
** <li> BLOB
** <li> NULL
** </ul>)^
**
** These constants are codes for each of those types.
**
** Note that the SQLITE_TEXT constant was also used in SQLite version 2
** for a completely different meaning.  Software that links against both
** SQLite version 2 and SQLite version 3 should use SQLITE3_TEXT, not
** SQLITE_TEXT.
*/
#define SQLITE_INTEGER  1
#define SQLITE_FLOAT    2
#define SQLITE_BLOB     4
#define SQLITE_NULL     5
#ifdef SQLITE_TEXT
# undef SQLITE_TEXT
#else
# define SQLITE_TEXT     3
#endif
#define SQLITE3_TEXT     3

/*
** CAPI3REF: Result Values From A Query
** KEYWORDS: {column access functions}
**
** These routines form the "result set" interface.
**
** ^These routines return information about a single column of the current
** result row of a query.  ^In every case the first argument is a pointer
** to the [prepared statement] that is being evaluated (the [sqlite3_stmt*]
** that was returned from [sqlite3_prepare_v2()] or one of its variants)
** and the second argument is the index of the column for which information
** should be returned. ^The leftmost column of the result set has the index 0.
** ^The number of columns in the result can be determined using
** [sqlite3_column_count()].
**
** If the SQL statement does not currently point to a valid row, or if the
** column index is out of range, the result is undefined.
** These routines may only be called when the most recent call to
** [sqlite3_step()] has returned [SQLITE_ROW] and neither
** [sqlite3_reset()] nor [sqlite3_finalize()] have been called subsequently.
** If any of these routines are called after [sqlite3_reset()] or
** [sqlite3_finalize()] or after [sqlite3_step()] has returned
** something other than [SQLITE_ROW], the results are undefined.
** If [sqlite3_step()] or [sqlite3_reset()] or [sqlite3_finalize()]
** are called from a different thread while any of these routines
** are pending, then the results are undefined.
**
** ^The sqlite3_column_type() routine returns the
** [SQLITE_INTEGER | datatype code] for the initial data type
** of the result column.  ^The returned value is one of [SQLITE_INTEGER],
** [SQLITE_FLOAT], [SQLITE_TEXT], [SQLITE_BLOB], or [SQLITE_NULL].  The value
** returned by sqlite3_column_type() is only meaningful if no type
** conversions have occurred as described below.  After a type conversion,
** the value returned by sqlite3_column_type() is undefined.  Future
** versions of SQLite may change the behavior of sqlite3_column_type()
** following a type conversion.
**
** ^If the result is a BLOB or UTF-8 string then the sqlite3_column_bytes()
** routine returns the number of bytes in that BLOB or string.
** ^If the result is a UTF-16 string, then sqlite3_column_bytes() converts
** the string to UTF-8 and then returns the number of bytes.
** ^If the result is a numeric value then sqlite3_column_bytes() uses
** [sqlite3_snprintf()] to convert that value to a UTF-8 string and returns
** the number of bytes in that string.
** ^If the result is NULL, then sqlite3_column_bytes() returns zero.
**
** ^If the result is a BLOB or UTF-16 string then the sqlite3_column_bytes16()
** routine returns the number of bytes in that BLOB or string.
** ^If the result is a UTF-8 string, then sqlite3_column_bytes16() converts
** the string to UTF-16 and then returns the number of bytes.
** ^If the result is a numeric value then sqlite3_column_bytes16() uses
** [sqlite3_snprintf()] to convert that value to a UTF-16 string and returns
** the number of bytes in that string.
** ^If the result is NULL, then sqlite3_column_bytes16() returns zero.
**
** ^The values returned by [sqlite3_column_bytes()] and 
** [sqlite3_column_bytes16()] do not include the zero terminators at the end
** of the string.  ^For clarity: the values returned by
** [sqlite3_column_bytes()] and [sqlite3_column_bytes16()] are the number of
** bytes in the string, not the number of characters.
**
** ^Strings returned by sqlite3_column_text() and sqlite3_column_text16(),
** even empty strings, are always zero-terminated.  ^The return
** value from sqlite3_column_blob() for a zero-length BLOB is a NULL pointer.
**
** ^The object returned by [sqlite3_column_value()] is an
** [unprotected sqlite3_value] object.  An unprotected sqlite3_value object
** may only be used with [sqlite3_bind_value()] and [sqlite3_result_value()].
** If the [unprotected sqlite3_value] object returned by
** [sqlite3_column_value()] is used in any other way, including calls
** to routines like [sqlite3_value_int()], [sqlite3_value_text()],
** or [sqlite3_value_bytes()], then the behavior is undefined.
**
** These routines attempt to convert the value where appropriate.  ^For
** example, if the internal representation is FLOAT and a text result
** is requested, [sqlite3_snprintf()] is used internally to perform the
** conversion automatically.  ^(The following table details the conversions
** that are applied:
**
** <blockquote>
** <table border="1">
** <tr><th> Internal<br>Type <th> Requested<br>Type <th>  Conversion
**
** <tr><td>  NULL    <td> INTEGER   <td> Result is 0
** <tr><td>  NULL    <td>  FLOAT    <td> Result is 0.0
** <tr><td>  NULL    <td>   TEXT    <td> Result is a NULL pointer
** <tr><td>  NULL    <td>   BLOB    <td> Result is a NULL pointer
** <tr><td> INTEGER  <td>  FLOAT    <td> Convert from integer to float
** <tr><td> INTEGER  <td>   TEXT    <td> ASCII rendering of the integer
** <tr><td> INTEGER  <td>   BLOB    <td> Same as INTEGER->TEXT
** <tr><td>  FLOAT   <td> INTEGER   <td> [CAST] to INTEGER
** <tr><td>  FLOAT   <td>   TEXT    <td> ASCII rendering of the float
** <tr><td>  FLOAT   <td>   BLOB    <td> [CAST] to BLOB
** <tr><td>  TEXT    <td> INTEGER   <td> [CAST] to INTEGER
** <tr><td>  TEXT    <td>  FLOAT    <td> [CAST] to REAL
** <tr><td>  TEXT    <td>   BLOB    <td> No change
** <tr><td>  BLOB    <td> INTEGER   <td> [CAST] to INTEGER
** <tr><td>  BLOB    <td>  FLOAT    <td> [CAST] to REAL
** <tr><td>  BLOB    <td>   TEXT    <td> Add a zero terminator if needed
** </table>
** </blockquote>)^
**
** The table above makes reference to standard C library functions atoi()
** and atof().  SQLite does not really use these functions.  It has its
** own equivalent internal routines.  The atoi() and atof() names are
** used in the table for brevity and because they are familiar to most
** C programmers.
**
** Note that when type conversions occur, pointers returned by prior
** calls to sqlite3_column_blob(), sqlite3_column_text(), and/or
** sqlite3_column_text16() may be invalidated.
** Type conversions and pointer invalidations might occur
** in the following cases:
**
** <ul>
** <li> The initial content is a BLOB and sqlite3_column_text() or
**      sqlite3_column_text16() is called.  A zero-terminator might
**      need to be added to the string.</li>
** <li> The initial content is UTF-8 text and sqlite3_column_bytes16() or
**      sqlite3_column_text16() is called.  The content must be converted
**      to UTF-16.</li>
** <li> The initial content is UTF-16 text and sqlite3_column_bytes() or
**      sqlite3_column_text() is called.  The content must be converted
**      to UTF-8.</li>
** </ul>
**
** ^Conversions between UTF-16be and UTF-16le are always done in place and do
** not invalidate a prior pointer, though of course the content of the buffer
** that the prior pointer references will have been modified.  Other kinds
** of conversion are done in place when it is possible, but sometimes they
** are not possible and in those cases prior pointers are invalidated.
**
** The safest and easiest to remember policy is to invoke these routines
** in one of the following ways:
**
** <ul>
**  <li>sqlite3_column_text() followed by sqlite3_column_bytes()</li>
**  <li>sqlite3_column_blob() followed by sqlite3_column_bytes()</li>
**  <li>sqlite3_column_text16() followed by sqlite3_column_bytes16()</li>
** </ul>
**
** In other words, you should call sqlite3_column_text(),
** sqlite3_column_blob(), or sqlite3_column_text16() first to force the result
** into the desired format, then invoke sqlite3_column_bytes() or
** sqlite3_column_bytes16() to find the size of the result.  Do not mix calls
** to sqlite3_column_text() or sqlite3_column_blob() with calls to
** sqlite3_column_bytes16(), and do not mix calls to sqlite3_column_text16()
** with calls to sqlite3_column_bytes().
**
** ^The pointers returned are valid until a type conversion occurs as
** described above, or until [sqlite3_step()] or [sqlite3_reset()] or
** [sqlite3_finalize()] is called.  ^The memory space used to hold strings
** and BLOBs is freed automatically.  Do <b>not</b> pass the pointers returned
** from [sqlite3_column_blob()], [sqlite3_column_text()], etc. into
** [sqlite3_free()].
**
** ^(If a memory allocation error occurs during the evaluation of any
** of these routines, a default value is returned.  The default value
** is either the integer 0, the floating point number 0.0, or a NULL
** pointer.  Subsequent calls to [sqlite3_errcode()] will return
** [SQLITE_NOMEM].)^
*/
SQLITE_API const void *sqlite3_column_blob(sqlite3_stmt*, int iCol);
SQLITE_API int sqlite3_column_bytes(sqlite3_stmt*, int iCol);
SQLITE_API int sqlite3_column_bytes16(sqlite3_stmt*, int iCol);
SQLITE_API double sqlite3_column_double(sqlite3_stmt*, int iCol);
SQLITE_API int sqlite3_column_int(sqlite3_stmt*, int iCol);
SQLITE_API sqlite3_int64 sqlite3_column_int64(sqlite3_stmt*, int iCol);
SQLITE_API const unsigned char *sqlite3_column_text(sqlite3_stmt*, int iCol);
SQLITE_API const void *sqlite3_column_text16(sqlite3_stmt*, int iCol);
SQLITE_API int sqlite3_column_type(sqlite3_stmt*, int iCol);
SQLITE_API sqlite3_value *sqlite3_column_value(sqlite3_stmt*, int iCol);

/*
** CAPI3REF: Destroy A Prepared Statement Object
**
** ^The sqlite3_finalize() function is called to delete a [prepared statement].
** ^If the most recent evaluation of the statement encountered no errors
** or if the statement is never been evaluated, then sqlite3_finalize() returns
** SQLITE_OK.  ^If the most recent evaluation of statement S failed, then
** sqlite3_finalize(S) returns the appropriate [error code] or
** [extended error code].
**
** ^The sqlite3_finalize(S) routine can be called at any point during
** the life cycle of [prepared statement] S:
** before statement S is ever evaluated, after
** one or more calls to [sqlite3_reset()], or after any call
** to [sqlite3_step()] regardless of whether or not the statement has
** completed execution.
**
** ^Invoking sqlite3_finalize() on a NULL pointer is a harmless no-op.
**
** The application must finalize every [prepared statement] in order to avoid
** resource leaks.  It is a grievous error for the application to try to use
** a prepared statement after it has been finalized.  Any use of a prepared
** statement after it has been finalized can result in undefined and
** undesirable behavior such as segfaults and heap corruption.
*/
SQLITE_API int sqlite3_finalize(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Reset A Prepared Statement Object
**
** The sqlite3_reset() function is called to reset a [prepared statement]
** object back to its initial state, ready to be re-executed.
** ^Any SQL statement variables that had values bound to them using
** the [sqlite3_bind_blob | sqlite3_bind_*() API] retain their values.
** Use [sqlite3_clear_bindings()] to reset the bindings.
**
** ^The [sqlite3_reset(S)] interface resets the [prepared statement] S
** back to the beginning of its program.
**
** ^If the most recent call to [sqlite3_step(S)] for the
** [prepared statement] S returned [SQLITE_ROW] or [SQLITE_DONE],
** or if [sqlite3_step(S)] has never before been called on S,
** then [sqlite3_reset(S)] returns [SQLITE_OK].
**
** ^If the most recent call to [sqlite3_step(S)] for the
** [prepared statement] S indicated an error, then
** [sqlite3_reset(S)] returns an appropriate [error code].
**
** ^The [sqlite3_reset(S)] interface does not change the values
** of any [sqlite3_bind_blob|bindings] on the [prepared statement] S.
*/
SQLITE_API int sqlite3_reset(sqlite3_stmt *pStmt);

/*
** CAPI3REF: Create Or Redefine SQL Functions
** KEYWORDS: {function creation routines}
** KEYWORDS: {application-defined SQL function}
** KEYWORDS: {application-defined SQL functions}
**
** ^These functions (collectively known as "function creation routines")
** are used to add SQL functions or aggregates or to redefine the behavior
** of existing SQL functions or aggregates.  The only differences between
** these routines are the text encoding expected for
** the second parameter (the name of the function being created)
** and the presence or absence of a destructor callback for
** the application data pointer.
**
** ^The first parameter is the [database connection] to which the SQL
** function is to be added.  ^If an application uses more than one database
** connection then application-defined SQL functions must be added
** to each database connection separately.
**
** ^The second parameter is the name of the SQL function to be created or
** redefined.  ^The length of the name is limited to 255 bytes in a UTF-8
** representation, exclusive of the zero-terminator.  ^Note that the name
** length limit is in UTF-8 bytes, not characters nor UTF-16 bytes.  
** ^Any attempt to create a function with a longer name
** will result in [SQLITE_MISUSE] being returned.
**
** ^The third parameter (nArg)
** is the number of arguments that the SQL function or
** aggregate takes. ^If this parameter is -1, then the SQL function or
** aggregate may take any number of arguments between 0 and the limit
** set by [sqlite3_limit]([SQLITE_LIMIT_FUNCTION_ARG]).  If the third
** parameter is less than -1 or greater than 127 then the behavior is
** undefined.
**
** ^The fourth parameter, eTextRep, specifies what
** [SQLITE_UTF8 | text encoding] this SQL function prefers for
** its parameters.  The application should set this parameter to
** [SQLITE_UTF16LE] if the function implementation invokes 
** [sqlite3_value_text16le()] on an input, or [SQLITE_UTF16BE] if the
** implementation invokes [sqlite3_value_text16be()] on an input, or
** [SQLITE_UTF16] if [sqlite3_value_text16()] is used, or [SQLITE_UTF8]
** otherwise.  ^The same SQL function may be registered multiple times using
** different preferred text encodings, with different implementations for
** each encoding.
** ^When multiple implementations of the same function are available, SQLite
** will pick the one that involves the least amount of data conversion.
**
** ^The fourth parameter may optionally be ORed with [SQLITE_DETERMINISTIC]
** to signal that the function will always return the same result given
** the same inputs within a single SQL statement.  Most SQL functions are
** deterministic.  The built-in [random()] SQL function is an example of a
** function that is not deterministic.  The SQLite query planner is able to
** perform additional optimizations on deterministic functions, so use
** of the [SQLITE_DETERMINISTIC] flag is recommended where possible.
**
** ^(The fifth parameter is an arbitrary pointer.  The implementation of the
** function can gain access to this pointer using [sqlite3_user_data()].)^
**
** ^The sixth, seventh and eighth parameters, xFunc, xStep and xFinal, are
** pointers to C-language functions that implement the SQL function or
** aggregate. ^A scalar SQL function requires an implementation of the xFunc
** callback only; NULL pointers must be passed as the xStep and xFinal
** parameters. ^An aggregate SQL function requires an implementation of xStep
** and xFinal and NULL pointer must be passed for xFunc. ^To delete an existing
** SQL function or aggregate, pass NULL pointers for all three function
** callbacks.
**
** ^(If the ninth parameter to sqlite3_create_function_v2() is not NULL,
** then it is destructor for the application data pointer. 
** The destructor is invoked when the function is deleted, either by being
** overloaded or when the database connection closes.)^
** ^The destructor is also invoked if the call to
** sqlite3_create_function_v2() fails.
** ^When the destructor callback of the tenth parameter is invoked, it
** is passed a single argument which is a copy of the application data 
** pointer which was the fifth parameter to sqlite3_create_function_v2().
**
** ^It is permitted to register multiple implementations of the same
** functions with the same name but with either differing numbers of
** arguments or differing preferred text encodings.  ^SQLite will use
** the implementation that most closely matches the way in which the
** SQL function is used.  ^A function implementation with a non-negative
** nArg parameter is a better match than a function implementation with
** a negative nArg.  ^A function where the preferred text encoding
** matches the database encoding is a better
** match than a function where the encoding is different.  
** ^A function where the encoding difference is between UTF16le and UTF16be
** is a closer match than a function where the encoding difference is
** between UTF8 and UTF16.
**
** ^Built-in functions may be overloaded by new application-defined functions.
**
** ^An application-defined function is permitted to call other
** SQLite interfaces.  However, such calls must not
** close the database connection nor finalize or reset the prepared
** statement in which the function is running.
*/
SQLITE_API int sqlite3_create_function(
  sqlite3 *db,
  const char *zFunctionName,
  int nArg,
  int eTextRep,
  void *pApp,
  void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
  void (*xStep)(sqlite3_context*,int,sqlite3_value**),
  void (*xFinal)(sqlite3_context*)
);
SQLITE_API int sqlite3_create_function16(
  sqlite3 *db,
  const void *zFunctionName,
  int nArg,
  int eTextRep,
  void *pApp,
  void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
  void (*xStep)(sqlite3_context*,int,sqlite3_value**),
  void (*xFinal)(sqlite3_context*)
);
SQLITE_API int sqlite3_create_function_v2(
  sqlite3 *db,
  const char *zFunctionName,
  int nArg,
  int eTextRep,
  void *pApp,
  void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
  void (*xStep)(sqlite3_context*,int,sqlite3_value**),
  void (*xFinal)(sqlite3_context*),
  void(*xDestroy)(void*)
);

/*
** CAPI3REF: Text Encodings
**
** These constant define integer codes that represent the various
** text encodings supported by SQLite.
*/
#define SQLITE_UTF8           1
#define SQLITE_UTF16LE        2
#define SQLITE_UTF16BE        3
#define SQLITE_UTF16          4    /* Use native byte order */
#define SQLITE_ANY            5    /* Deprecated */
#define SQLITE_UTF16_ALIGNED  8    /* sqlite3_create_collation only */

/*
** CAPI3REF: Function Flags
**
** These constants may be ORed together with the 
** [SQLITE_UTF8 | preferred text encoding] as the fourth argument
** to [sqlite3_create_function()], [sqlite3_create_function16()], or
** [sqlite3_create_function_v2()].
*/
#define SQLITE_DETERMINISTIC    0x800

/*
** CAPI3REF: Deprecated Functions
** DEPRECATED
**
** These functions are [deprecated].  In order to maintain
** backwards compatibility with older code, these functions continue 
** to be supported.  However, new applications should avoid
** the use of these functions.  To help encourage people to avoid
** using these functions, we are not going to tell you what they do.
*/
#ifndef SQLITE_OMIT_DEPRECATED
SQLITE_API SQLITE_DEPRECATED int sqlite3_aggregate_count(sqlite3_context*);
SQLITE_API SQLITE_DEPRECATED int sqlite3_expired(sqlite3_stmt*);
SQLITE_API SQLITE_DEPRECATED int sqlite3_transfer_bindings(sqlite3_stmt*, sqlite3_stmt*);
SQLITE_API SQLITE_DEPRECATED int sqlite3_global_recover(void);
SQLITE_API SQLITE_DEPRECATED void sqlite3_thread_cleanup(void);
SQLITE_API SQLITE_DEPRECATED int sqlite3_memory_alarm(void(*)(void*,sqlite3_int64,int),
                      void*,sqlite3_int64);
#endif

/*
** CAPI3REF: Obtaining SQL Function Parameter Values
**
** The C-language implementation of SQL functions and aggregates uses
** this set of interface routines to access the parameter values on
** the function or aggregate.
**
** The xFunc (for scalar functions) or xStep (for aggregates) parameters
** to [sqlite3_create_function()] and [sqlite3_create_function16()]
** define callbacks that implement the SQL functions and aggregates.
** The 3rd parameter to these callbacks is an array of pointers to
** [protected sqlite3_value] objects.  There is one [sqlite3_value] object for
** each parameter to the SQL function.  These routines are used to
** extract values from the [sqlite3_value] objects.
**
** These routines work only with [protected sqlite3_value] objects.
** Any attempt to use these routines on an [unprotected sqlite3_value]
** object results in undefined behavior.
**
** ^These routines work just like the corresponding [column access functions]
** except that  these routines take a single [protected sqlite3_value] object
** pointer instead of a [sqlite3_stmt*] pointer and an integer column number.
**
** ^The sqlite3_value_text16() interface extracts a UTF-16 string
** in the native byte-order of the host machine.  ^The
** sqlite3_value_text16be() and sqlite3_value_text16le() interfaces
** extract UTF-16 strings as big-endian and little-endian respectively.
**
** ^(The sqlite3_value_numeric_type() interface attempts to apply
** numeric affinity to the value.  This means that an attempt is
** made to convert the value to an integer or floating point.  If
** such a conversion is possible without loss of information (in other
** words, if the value is a string that looks like a number)
** then the conversion is performed.  Otherwise no conversion occurs.
** The [SQLITE_INTEGER | datatype] after conversion is returned.)^
**
** Please pay particular attention to the fact that the pointer returned
** from [sqlite3_value_blob()], [sqlite3_value_text()], or
** [sqlite3_value_text16()] can be invalidated by a subsequent call to
** [sqlite3_value_bytes()], [sqlite3_value_bytes16()], [sqlite3_value_text()],
** or [sqlite3_value_text16()].
**
** These routines must be called from the same thread as
** the SQL function that supplied the [sqlite3_value*] parameters.
*/
SQLITE_API const void *sqlite3_value_blob(sqlite3_value*);
SQLITE_API int sqlite3_value_bytes(sqlite3_value*);
SQLITE_API int sqlite3_value_bytes16(sqlite3_value*);
SQLITE_API double sqlite3_value_double(sqlite3_value*);
SQLITE_API int sqlite3_value_int(sqlite3_value*);
SQLITE_API sqlite3_int64 sqlite3_value_int64(sqlite3_value*);
SQLITE_API const unsigned char *sqlite3_value_text(sqlite3_value*);
SQLITE_API const void *sqlite3_value_text16(sqlite3_value*);
SQLITE_API const void *sqlite3_value_text16le(sqlite3_value*);
SQLITE_API const void *sqlite3_value_text16be(sqlite3_value*);
SQLITE_API int sqlite3_value_type(sqlite3_value*);
SQLITE_API int sqlite3_value_numeric_type(sqlite3_value*);

/*
** CAPI3REF: Obtain Aggregate Function Context
**
** Implementations of aggregate SQL functions use this
** routine to allocate memory for storing their state.
**
** ^The first time the sqlite3_aggregate_context(C,N) routine is called 
** for a particular aggregate function, SQLite
** allocates N of memory, zeroes out that memory, and returns a pointer
** to the new memory. ^On second and subsequent calls to
** sqlite3_aggregate_context() for the same aggregate function instance,
** the same buffer is returned.  Sqlite3_aggregate_context() is normally
** called once for each invocation of the xStep callback and then one
** last time when the xFinal callback is invoked.  ^(When no rows match
** an aggregate query, the xStep() callback of the aggregate function
** implementation is never called and xFinal() is called exactly once.
** In those cases, sqlite3_aggregate_context() might be called for the
** first time from within xFinal().)^
**
** ^The sqlite3_aggregate_context(C,N) routine returns a NULL pointer 
** when first called if N is less than or equal to zero or if a memory
** allocate error occurs.
**
** ^(The amount of space allocated by sqlite3_aggregate_context(C,N) is
** determined by the N parameter on first successful call.  Changing the
** value of N in subsequent call to sqlite3_aggregate_context() within
** the same aggregate function instance will not resize the memory
** allocation.)^  Within the xFinal callback, it is customary to set
** N=0 in calls to sqlite3_aggregate_context(C,N) so that no 
** pointless memory allocations occur.
**
** ^SQLite automatically frees the memory allocated by 
** sqlite3_aggregate_context() when the aggregate query concludes.
**
** The first parameter must be a copy of the
** [sqlite3_context | SQL function context] that is the first parameter
** to the xStep or xFinal callback routine that implements the aggregate
** function.
**
** This routine must be called from the same thread in which
** the aggregate SQL function is running.
*/
SQLITE_API void *sqlite3_aggregate_context(sqlite3_context*, int nBytes);

/*
** CAPI3REF: User Data For Functions
**
** ^The sqlite3_user_data() interface returns a copy of
** the pointer that was the pUserData parameter (the 5th parameter)
** of the [sqlite3_create_function()]
** and [sqlite3_create_function16()] routines that originally
** registered the application defined function.
**
** This routine must be called from the same thread in which
** the application-defined function is running.
*/
SQLITE_API void *sqlite3_user_data(sqlite3_context*);

/*
** CAPI3REF: Database Connection For Functions
**
** ^The sqlite3_context_db_handle() interface returns a copy of
** the pointer to the [database connection] (the 1st parameter)
** of the [sqlite3_create_function()]
** and [sqlite3_create_function16()] routines that originally
** registered the application defined function.
*/
SQLITE_API sqlite3 *sqlite3_context_db_handle(sqlite3_context*);

/*
** CAPI3REF: Function Auxiliary Data
**
** These functions may be used by (non-aggregate) SQL functions to
** associate metadata with argument values. If the same value is passed to
** multiple invocations of the same SQL function during query execution, under
** some circumstances the associated metadata may be preserved.  An example
** of where this might be useful is in a regular-expression matching
** function. The compiled version of the regular expression can be stored as
** metadata associated with the pattern string.  
** Then as long as the pattern string remains the same,
** the compiled regular expression can be reused on multiple
** invocations of the same function.
**
** ^The sqlite3_get_auxdata() interface returns a pointer to the metadata
** associated by the sqlite3_set_auxdata() function with the Nth argument
** value to the application-defined function. ^If there is no metadata
** associated with the function argument, this sqlite3_get_auxdata() interface
** returns a NULL pointer.
**
** ^The sqlite3_set_auxdata(C,N,P,X) interface saves P as metadata for the N-th
** argument of the application-defined function.  ^Subsequent
** calls to sqlite3_get_auxdata(C,N) return P from the most recent
** sqlite3_set_auxdata(C,N,P,X) call if the metadata is still valid or
** NULL if the metadata has been discarded.
** ^After each call to sqlite3_set_auxdata(C,N,P,X) where X is not NULL,
** SQLite will invoke the destructor function X with parameter P exactly
** once, when the metadata is discarded.
** SQLite is free to discard the metadata at any time, including: <ul>
** <li> when the corresponding function parameter changes, or
** <li> when [sqlite3_reset()] or [sqlite3_finalize()] is called for the
**      SQL statement, or
** <li> when sqlite3_set_auxdata() is invoked again on the same parameter, or
** <li> during the original sqlite3_set_auxdata() call when a memory 
**      allocation error occurs. </ul>)^
**
** Note the last bullet in particular.  The destructor X in 
** sqlite3_set_auxdata(C,N,P,X) might be called immediately, before the
** sqlite3_set_auxdata() interface even returns.  Hence sqlite3_set_auxdata()
** should be called near the end of the function implementation and the
** function implementation should not make any use of P after
** sqlite3_set_auxdata() has been called.
**
** ^(In practice, metadata is preserved between function calls for
** function parameters that are compile-time constants, including literal
** values and [parameters] and expressions composed from the same.)^
**
** These routines must be called from the same thread in which
** the SQL function is running.
*/
SQLITE_API void *sqlite3_get_auxdata(sqlite3_context*, int N);
SQLITE_API void sqlite3_set_auxdata(sqlite3_context*, int N, void*, void (*)(void*));


/*
** CAPI3REF: Constants Defining Special Destructor Behavior
**
** These are special values for the destructor that is passed in as the
** final argument to routines like [sqlite3_result_blob()].  ^If the destructor
** argument is SQLITE_STATIC, it means that the content pointer is constant
** and will never change.  It does not need to be destroyed.  ^The
** SQLITE_TRANSIENT value means that the content will likely change in
** the near future and that SQLite should make its own private copy of
** the content before returning.
**
** The typedef is necessary to work around problems in certain
** C++ compilers.
*/
typedef void (*sqlite3_destructor_type)(void*);
#define SQLITE_STATIC      ((sqlite3_destructor_type)0)
#define SQLITE_TRANSIENT   ((sqlite3_destructor_type)-1)

/*
** CAPI3REF: Setting The Result Of An SQL Function
**
** These routines are used by the xFunc or xFinal callbacks that
** implement SQL functions and aggregates.  See
** [sqlite3_create_function()] and [sqlite3_create_function16()]
** for additional information.
**
** These functions work very much like the [parameter binding] family of
** functions used to bind values to host parameters in prepared statements.
** Refer to the [SQL parameter] documentation for additional information.
**
** ^The sqlite3_result_blob() interface sets the result from
** an application-defined function to be the BLOB whose content is pointed
** to by the second parameter and which is N bytes long where N is the
** third parameter.
**
** ^The sqlite3_result_zeroblob() interfaces set the result of
** the application-defined function to be a BLOB containing all zero
** bytes and N bytes in size, where N is the value of the 2nd parameter.
**
** ^The sqlite3_result_double() interface sets the result from
** an application-defined function to be a floating point value specified
** by its 2nd argument.
**
** ^The sqlite3_result_error() and sqlite3_result_error16() functions
** cause the implemented SQL function to throw an exception.
** ^SQLite uses the string pointed to by the
** 2nd parameter of sqlite3_result_error() or sqlite3_result_error16()
** as the text of an error message.  ^SQLite interprets the error
** message string from sqlite3_result_error() as UTF-8. ^SQLite
** interprets the string from sqlite3_result_error16() as UTF-16 in native
** byte order.  ^If the third parameter to sqlite3_result_error()
** or sqlite3_result_error16() is negative then SQLite takes as the error
** message all text up through the first zero character.
** ^If the third parameter to sqlite3_result_error() or
** sqlite3_result_error16() is non-negative then SQLite takes that many
** bytes (not characters) from the 2nd parameter as the error message.
** ^The sqlite3_result_error() and sqlite3_result_error16()
** routines make a private copy of the error message text before
** they return.  Hence, the calling function can deallocate or
** modify the text after they return without harm.
** ^The sqlite3_result_error_code() function changes the error code
** returned by SQLite as a result of an error in a function.  ^By default,
** the error code is SQLITE_ERROR.  ^A subsequent call to sqlite3_result_error()
** or sqlite3_result_error16() resets the error code to SQLITE_ERROR.
**
** ^The sqlite3_result_error_toobig() interface causes SQLite to throw an
** error indicating that a string or BLOB is too long to represent.
**
** ^The sqlite3_result_error_nomem() interface causes SQLite to throw an
** error indicating that a memory allocation failed.
**
** ^The sqlite3_result_int() interface sets the return value
** of the application-defined function to be the 32-bit signed integer
** value given in the 2nd argument.
** ^The sqlite3_result_int64() interface sets the return value
** of the application-defined function to be the 64-bit signed integer
** value given in the 2nd argument.
**
** ^The sqlite3_result_null() interface sets the return value
** of the application-defined function to be NULL.
**
** ^The sqlite3_result_text(), sqlite3_result_text16(),
** sqlite3_result_text16le(), and sqlite3_result_text16be() interfaces
** set the return value of the application-defined function to be
** a text string which is represented as UTF-8, UTF-16 native byte order,
** UTF-16 little endian, or UTF-16 big endian, respectively.
** ^SQLite takes the text result from the application from
** the 2nd parameter of the sqlite3_result_text* interfaces.
** ^If the 3rd parameter to the sqlite3_result_text* interfaces
** is negative, then SQLite takes result text from the 2nd parameter
** through the first zero character.
** ^If the 3rd parameter to the sqlite3_result_text* interfaces
** is non-negative, then as many bytes (not characters) of the text
** pointed to by the 2nd parameter are taken as the application-defined
** function result.  If the 3rd parameter is non-negative, then it
** must be the byte offset into the string where the NUL terminator would
** appear if the string where NUL terminated.  If any NUL characters occur
** in the string at a byte offset that is less than the value of the 3rd
** parameter, then the resulting string will contain embedded NULs and the
** result of expressions operating on strings with embedded NULs is undefined.
** ^If the 4th parameter to the sqlite3_result_text* interfaces
** or sqlite3_result_blob is a non-NULL pointer, then SQLite calls that
** function as the destructor on the text or BLOB result when it has
** finished using that result.
** ^If the 4th parameter to the sqlite3_result_text* interfaces or to
** sqlite3_result_blob is the special constant SQLITE_STATIC, then SQLite
** assumes that the text or BLOB result is in constant space and does not
** copy the content of the parameter nor call a destructor on the content
** when it has finished using that result.
** ^If the 4th parameter to the sqlite3_result_text* interfaces
** or sqlite3_result_blob is the special constant SQLITE_TRANSIENT
** then SQLite makes a copy of the result into space obtained from
** from [sqlite3_malloc()] before it returns.
**
** ^The sqlite3_result_value() interface sets the result of
** the application-defined function to be a copy the
** [unprotected sqlite3_value] object specified by the 2nd parameter.  ^The
** sqlite3_result_value() interface makes a copy of the [sqlite3_value]
** so that the [sqlite3_value] specified in the parameter may change or
** be deallocated after sqlite3_result_value() returns without harm.
** ^A [protected sqlite3_value] object may always be used where an
** [unprotected sqlite3_value] object is required, so either
** kind of [sqlite3_value] object can be used with this interface.
**
** If these routines are called from within the different thread
** than the one containing the application-defined function that received
** the [sqlite3_context] pointer, the results are undefined.
*/
SQLITE_API void sqlite3_result_blob(sqlite3_context*, const void*, int, void(*)(void*));
SQLITE_API void sqlite3_result_double(sqlite3_context*, double);
SQLITE_API void sqlite3_result_error(sqlite3_context*, const char*, int);
SQLITE_API void sqlite3_result_error16(sqlite3_context*, const void*, int);
SQLITE_API void sqlite3_result_error_toobig(sqlite3_context*);
SQLITE_API void sqlite3_result_error_nomem(sqlite3_context*);
SQLITE_API void sqlite3_result_error_code(sqlite3_context*, int);
SQLITE_API void sqlite3_result_int(sqlite3_context*, int);
SQLITE_API void sqlite3_result_int64(sqlite3_context*, sqlite3_int64);
SQLITE_API void sqlite3_result_null(sqlite3_context*);
SQLITE_API void sqlite3_result_text(sqlite3_context*, const char*, int, void(*)(void*));
SQLITE_API void sqlite3_result_text16(sqlite3_context*, const void*, int, void(*)(void*));
SQLITE_API void sqlite3_result_text16le(sqlite3_context*, const void*, int,void(*)(void*));
SQLITE_API void sqlite3_result_text16be(sqlite3_context*, const void*, int,void(*)(void*));
SQLITE_API void sqlite3_result_value(sqlite3_context*, sqlite3_value*);
SQLITE_API void sqlite3_result_zeroblob(sqlite3_context*, int n);

/*
** CAPI3REF: Define New Collating Sequences
**
** ^These functions add, remove, or modify a [collation] associated
** with the [database connection] specified as the first argument.
**
** ^The name of the collation is a UTF-8 string
** for sqlite3_create_collation() and sqlite3_create_collation_v2()
** and a UTF-16 string in native byte order for sqlite3_create_collation16().
** ^Collation names that compare equal according to [sqlite3_strnicmp()] are
** considered to be the same name.
**
** ^(The third argument (eTextRep) must be one of the constants:
** <ul>
** <li> [SQLITE_UTF8],
** <li> [SQLITE_UTF16LE],
** <li> [SQLITE_UTF16BE],
** <li> [SQLITE_UTF16], or
** <li> [SQLITE_UTF16_ALIGNED].
** </ul>)^
** ^The eTextRep argument determines the encoding of strings passed
** to the collating function callback, xCallback.
** ^The [SQLITE_UTF16] and [SQLITE_UTF16_ALIGNED] values for eTextRep
** force strings to be UTF16 with native byte order.
** ^The [SQLITE_UTF16_ALIGNED] value for eTextRep forces strings to begin
** on an even byte address.
**
** ^The fourth argument, pArg, is an application data pointer that is passed
** through as the first argument to the collating function callback.
**
** ^The fifth argument, xCallback, is a pointer to the collating function.
** ^Multiple collating functions can be registered using the same name but
** with different eTextRep parameters and SQLite will use whichever
** function requires the least amount of data transformation.
** ^If the xCallback argument is NULL then the collating function is
** deleted.  ^When all collating functions having the same name are deleted,
** that collation is no longer usable.
**
** ^The collating function callback is invoked with a copy of the pArg 
** application data pointer and with two strings in the encoding specified
** by the eTextRep argument.  The collating function must return an
** integer that is negative, zero, or positive
** if the first string is less than, equal to, or greater than the second,
** respectively.  A collating function must always return the same answer
** given the same inputs.  If two or more collating functions are registered
** to the same collation name (using different eTextRep values) then all
** must give an equivalent answer when invoked with equivalent strings.
** The collating function must obey the following properties for all
** strings A, B, and C:
**
** <ol>
** <li> If A==B then B==A.
** <li> If A==B and B==C then A==C.
** <li> If A&lt;B THEN B&gt;A.
** <li> If A&lt;B and B&lt;C then A&lt;C.
** </ol>
**
** If a collating function fails any of the above constraints and that
** collating function is  registered and used, then the behavior of SQLite
** is undefined.
**
** ^The sqlite3_create_collation_v2() works like sqlite3_create_collation()
** with the addition that the xDestroy callback is invoked on pArg when
** the collating function is deleted.
** ^Collating functions are deleted when they are overridden by later
** calls to the collation creation functions or when the
** [database connection] is closed using [sqlite3_close()].
**
** ^The xDestroy callback is <u>not</u> called if the 
** sqlite3_create_collation_v2() function fails.  Applications that invoke
** sqlite3_create_collation_v2() with a non-NULL xDestroy argument should 
** check the return code and dispose of the application data pointer
** themselves rather than expecting SQLite to deal with it for them.
** This is different from every other SQLite interface.  The inconsistency 
** is unfortunate but cannot be changed without breaking backwards 
** compatibility.
**
** See also:  [sqlite3_collation_needed()] and [sqlite3_collation_needed16()].
*/
SQLITE_API int sqlite3_create_collation(
  sqlite3*, 
  const char *zName, 
  int eTextRep, 
  void *pArg,
  int(*xCompare)(void*,int,const void*,int,const void*)
);
SQLITE_API int sqlite3_create_collation_v2(
  sqlite3*, 
  const char *zName, 
  int eTextRep, 
  void *pArg,
  int(*xCompare)(void*,int,const void*,int,const void*),
  void(*xDestroy)(void*)
);
SQLITE_API int sqlite3_create_collation16(
  sqlite3*, 
  const void *zName,
  int eTextRep, 
  void *pArg,
  int(*xCompare)(void*,int,const void*,int,const void*)
);

/*
** CAPI3REF: Collation Needed Callbacks
**
** ^To avoid having to register all collation sequences before a database
** can be used, a single callback function may be registered with the
** [database connection] to be invoked whenever an undefined collation
** sequence is required.
**
** ^If the function is registered using the sqlite3_collation_needed() API,
** then it is passed the names of undefined collation sequences as strings
** encoded in UTF-8. ^If sqlite3_collation_needed16() is used,
** the names are passed as UTF-16 in machine native byte order.
** ^A call to either function replaces the existing collation-needed callback.
**
** ^(When the callback is invoked, the first argument passed is a copy
** of the second argument to sqlite3_collation_needed() or
** sqlite3_collation_needed16().  The second argument is the database
** connection.  The third argument is one of [SQLITE_UTF8], [SQLITE_UTF16BE],
** or [SQLITE_UTF16LE], indicating the most desirable form of the collation
** sequence function required.  The fourth parameter is the name of the
** required collation sequence.)^
**
** The callback function should register the desired collation using
** [sqlite3_create_collation()], [sqlite3_create_collation16()], or
** [sqlite3_create_collation_v2()].
*/
SQLITE_API int sqlite3_collation_needed(
  sqlite3*, 
  void*, 
  void(*)(void*,sqlite3*,int eTextRep,const char*)
);
SQLITE_API int sqlite3_collation_needed16(
  sqlite3*, 
  void*,
  void(*)(void*,sqlite3*,int eTextRep,const void*)
);

#ifdef SQLITE_HAS_CODEC
/*
** Specify the key for an encrypted database.  This routine should be
** called right after sqlite3_open().
**
** The code to implement this API is not available in the public release
** of SQLite.
*/
SQLITE_API int sqlite3_key(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The key */
);
SQLITE_API int sqlite3_key_v2(
  sqlite3 *db,                   /* Database to be rekeyed */
  const char *zDbName,           /* Name of the database */
  const void *pKey, int nKey     /* The key */
);

/*
** Change the key on an open database.  If the current database is not
** encrypted, this routine will encrypt it.  If pNew==0 or nNew==0, the
** database is decrypted.
**
** The code to implement this API is not available in the public release
** of SQLite.
*/
SQLITE_API int sqlite3_rekey(
  sqlite3 *db,                   /* Database to be rekeyed */
  const void *pKey, int nKey     /* The new key */
);
SQLITE_API int sqlite3_rekey_v2(
  sqlite3 *db,                   /* Database to be rekeyed */
  const char *zDbName,           /* Name of the database */
  const void *pKey, int nKey     /* The new key */
);

/*
** Specify the activation key for a SEE database.  Unless 
** activated, none of the SEE routines will work.
*/
SQLITE_API void sqlite3_activate_see(
  const char *zPassPhrase        /* Activation phrase */
);
#endif

#ifdef SQLITE_ENABLE_CEROD
/*
** Specify the activation key for a CEROD database.  Unless 
** activated, none of the CEROD routines will work.
*/
SQLITE_API void sqlite3_activate_cerod(
  const char *zPassPhrase        /* Activation phrase */
);
#endif

/*
** CAPI3REF: Suspend Execution For A Short Time
**
** The sqlite3_sleep() function causes the current thread to suspend execution
** for at least a number of milliseconds specified in its parameter.
**
** If the operating system does not support sleep requests with
** millisecond time resolution, then the time will be rounded up to
** the nearest second. The number of milliseconds of sleep actually
** requested from the operating system is returned.
**
** ^SQLite implements this interface by calling the xSleep()
** method of the default [sqlite3_vfs] object.  If the xSleep() method
** of the default VFS is not implemented correctly, or not implemented at
** all, then the behavior of sqlite3_sleep() may deviate from the description
** in the previous paragraphs.
*/
SQLITE_API int sqlite3_sleep(int);

/*
** CAPI3REF: Name Of The Folder Holding Temporary Files
**
** ^(If this global variable is made to point to a string which is
** the name of a folder (a.k.a. directory), then all temporary files
** created by SQLite when using a built-in [sqlite3_vfs | VFS]
** will be placed in that directory.)^  ^If this variable
** is a NULL pointer, then SQLite performs a search for an appropriate
** temporary file directory.
**
** It is not safe to read or modify this variable in more than one
** thread at a time.  It is not safe to read or modify this variable
** if a [database connection] is being used at the same time in a separate
** thread.
** It is intended that this variable be set once
** as part of process initialization and before any SQLite interface
** routines have been called and that this variable remain unchanged
** thereafter.
**
** ^The [temp_store_directory pragma] may modify this variable and cause
** it to point to memory obtained from [sqlite3_malloc].  ^Furthermore,
** the [temp_store_directory pragma] always assumes that any string
** that this variable points to is held in memory obtained from 
** [sqlite3_malloc] and the pragma may attempt to free that memory
** using [sqlite3_free].
** Hence, if this variable is modified directly, either it should be
** made NULL or made to point to memory obtained from [sqlite3_malloc]
** or else the use of the [temp_store_directory pragma] should be avoided.
**
** <b>Note to Windows Runtime users:</b>  The temporary directory must be set
** prior to calling [sqlite3_open] or [sqlite3_open_v2].  Otherwise, various
** features that require the use of temporary files may fail.  Here is an
** example of how to do this using C++ with the Windows Runtime:
**
** <blockquote><pre>
** LPCWSTR zPath = Windows::Storage::ApplicationData::Current->
** &nbsp;     TemporaryFolder->Path->Data();
** char zPathBuf&#91;MAX_PATH + 1&#93;;
** memset(zPathBuf, 0, sizeof(zPathBuf));
** WideCharToMultiByte(CP_UTF8, 0, zPath, -1, zPathBuf, sizeof(zPathBuf),
** &nbsp;     NULL, NULL);
** sqlite3_temp_directory = sqlite3_mprintf("%s", zPathBuf);
** </pre></blockquote>
*/
SQLITE_API SQLITE_EXTERN char *sqlite3_temp_directory;

/*
** CAPI3REF: Name Of The Folder Holding Database Files
**
** ^(If this global variable is made to point to a string which is
** the name of a folder (a.k.a. directory), then all database files
** specified with a relative pathname and created or accessed by
** SQLite when using a built-in windows [sqlite3_vfs | VFS] will be assumed
** to be relative to that directory.)^ ^If this variable is a NULL
** pointer, then SQLite assumes that all database files specified
** with a relative pathname are relative to the current directory
** for the process.  Only the windows VFS makes use of this global
** variable; it is ignored by the unix VFS.
**
** Changing the value of this variable while a database connection is
** open can result in a corrupt database.
**
** It is not safe to read or modify this variable in more than one
** thread at a time.  It is not safe to read or modify this variable
** if a [database connection] is being used at the same time in a separate
** thread.
** It is intended that this variable be set once
** as part of process initialization and before any SQLite interface
** routines have been called and that this variable remain unchanged
** thereafter.
**
** ^The [data_store_directory pragma] may modify this variable and cause
** it to point to memory obtained from [sqlite3_malloc].  ^Furthermore,
** the [data_store_directory pragma] always assumes that any string
** that this variable points to is held in memory obtained from 
** [sqlite3_malloc] and the pragma may attempt to free that memory
** using [sqlite3_free].
** Hence, if this variable is modified directly, either it should be
** made NULL or made to point to memory obtained from [sqlite3_malloc]
** or else the use of the [data_store_directory pragma] should be avoided.
*/
SQLITE_API SQLITE_EXTERN char *sqlite3_data_directory;

/*
** CAPI3REF: Test For Auto-Commit Mode
** KEYWORDS: {autocommit mode}
**
** ^The sqlite3_get_autocommit() interface returns non-zero or
** zero if the given database connection is or is not in autocommit mode,
** respectively.  ^Autocommit mode is on by default.
** ^Autocommit mode is disabled by a [BEGIN] statement.
** ^Autocommit mode is re-enabled by a [COMMIT] or [ROLLBACK].
**
** If certain kinds of errors occur on a statement within a multi-statement
** transaction (errors including [SQLITE_FULL], [SQLITE_IOERR],
** [SQLITE_NOMEM], [SQLITE_BUSY], and [SQLITE_INTERRUPT]) then the
** transaction might be rolled back automatically.  The only way to
** find out whether SQLite automatically rolled back the transaction after
** an error is to use this function.
**
** If another thread changes the autocommit status of the database
** connection while this routine is running, then the return value
** is undefined.
*/
SQLITE_API int sqlite3_get_autocommit(sqlite3*);

/*
** CAPI3REF: Find The Database Handle Of A Prepared Statement
**
** ^The sqlite3_db_handle interface returns the [database connection] handle
** to which a [prepared statement] belongs.  ^The [database connection]
** returned by sqlite3_db_handle is the same [database connection]
** that was the first argument
** to the [sqlite3_prepare_v2()] call (or its variants) that was used to
** create the statement in the first place.
*/
SQLITE_API sqlite3 *sqlite3_db_handle(sqlite3_stmt*);

/*
** CAPI3REF: Return The Filename For A Database Connection
**
** ^The sqlite3_db_filename(D,N) interface returns a pointer to a filename
** associated with database N of connection D.  ^The main database file
** has the name "main".  If there is no attached database N on the database
** connection D, or if database N is a temporary or in-memory database, then
** a NULL pointer is returned.
**
** ^The filename returned by this function is the output of the
** xFullPathname method of the [VFS].  ^In other words, the filename
** will be an absolute pathname, even if the filename used
** to open the database originally was a URI or relative pathname.
*/
SQLITE_API const char *sqlite3_db_filename(sqlite3 *db, const char *zDbName);

/*
** CAPI3REF: Determine if a database is read-only
**
** ^The sqlite3_db_readonly(D,N) interface returns 1 if the database N
** of connection D is read-only, 0 if it is read/write, or -1 if N is not
** the name of a database on connection D.
*/
SQLITE_API int sqlite3_db_readonly(sqlite3 *db, const char *zDbName);

/*
** CAPI3REF: Find the next prepared statement
**
** ^This interface returns a pointer to the next [prepared statement] after
** pStmt associated with the [database connection] pDb.  ^If pStmt is NULL
** then this interface returns a pointer to the first prepared statement
** associated with the database connection pDb.  ^If no prepared statement
** satisfies the conditions of this routine, it returns NULL.
**
** The [database connection] pointer D in a call to
** [sqlite3_next_stmt(D,S)] must refer to an open database
** connection and in particular must not be a NULL pointer.
*/
SQLITE_API sqlite3_stmt *sqlite3_next_stmt(sqlite3 *pDb, sqlite3_stmt *pStmt);

/*
** CAPI3REF: Commit And Rollback Notification Callbacks
**
** ^The sqlite3_commit_hook() interface registers a callback
** function to be invoked whenever a transaction is [COMMIT | committed].
** ^Any callback set by a previous call to sqlite3_commit_hook()
** for the same database connection is overridden.
** ^The sqlite3_rollback_hook() interface registers a callback
** function to be invoked whenever a transaction is [ROLLBACK | rolled back].
** ^Any callback set by a previous call to sqlite3_rollback_hook()
** for the same database connection is overridden.
** ^The pArg argument is passed through to the callback.
** ^If the callback on a commit hook function returns non-zero,
** then the commit is converted into a rollback.
**
** ^The sqlite3_commit_hook(D,C,P) and sqlite3_rollback_hook(D,C,P) functions
** return the P argument from the previous call of the same function
** on the same [database connection] D, or NULL for
** the first call for each function on D.
**
** The commit and rollback hook callbacks are not reentrant.
** The callback implementation must not do anything that will modify
** the database connection that invoked the callback.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the commit
** or rollback hook in the first place.
** Note that running any other SQL statements, including SELECT statements,
** or merely calling [sqlite3_prepare_v2()] and [sqlite3_step()] will modify
** the database connections for the meaning of "modify" in this paragraph.
**
** ^Registering a NULL function disables the callback.
**
** ^When the commit hook callback routine returns zero, the [COMMIT]
** operation is allowed to continue normally.  ^If the commit hook
** returns non-zero, then the [COMMIT] is converted into a [ROLLBACK].
** ^The rollback hook is invoked on a rollback that results from a commit
** hook returning non-zero, just as it would be with any other rollback.
**
** ^For the purposes of this API, a transaction is said to have been
** rolled back if an explicit "ROLLBACK" statement is executed, or
** an error or constraint causes an implicit rollback to occur.
** ^The rollback callback is not invoked if a transaction is
** automatically rolled back because the database connection is closed.
**
** See also the [sqlite3_update_hook()] interface.
*/
SQLITE_API void *sqlite3_commit_hook(sqlite3*, int(*)(void*), void*);
SQLITE_API void *sqlite3_rollback_hook(sqlite3*, void(*)(void *), void*);

/*
** CAPI3REF: Data Change Notification Callbacks
**
** ^The sqlite3_update_hook() interface registers a callback function
** with the [database connection] identified by the first argument
** to be invoked whenever a row is updated, inserted or deleted in
** a rowid table.
** ^Any callback set by a previous call to this function
** for the same database connection is overridden.
**
** ^The second argument is a pointer to the function to invoke when a
** row is updated, inserted or deleted in a rowid table.
** ^The first argument to the callback is a copy of the third argument
** to sqlite3_update_hook().
** ^The second callback argument is one of [SQLITE_INSERT], [SQLITE_DELETE],
** or [SQLITE_UPDATE], depending on the operation that caused the callback
** to be invoked.
** ^The third and fourth arguments to the callback contain pointers to the
** database and table name containing the affected row.
** ^The final callback parameter is the [rowid] of the row.
** ^In the case of an update, this is the [rowid] after the update takes place.
**
** ^(The update hook is not invoked when internal system tables are
** modified (i.e. sqlite_master and sqlite_sequence).)^
** ^The update hook is not invoked when [WITHOUT ROWID] tables are modified.
**
** ^In the current implementation, the update hook
** is not invoked when duplication rows are deleted because of an
** [ON CONFLICT | ON CONFLICT REPLACE] clause.  ^Nor is the update hook
** invoked when rows are deleted using the [truncate optimization].
** The exceptions defined in this paragraph might change in a future
** release of SQLite.
**
** The update hook implementation must not do anything that will modify
** the database connection that invoked the update hook.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the update hook.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^The sqlite3_update_hook(D,C,P) function
** returns the P argument from the previous call
** on the same [database connection] D, or NULL for
** the first call on D.
**
** See also the [sqlite3_commit_hook()] and [sqlite3_rollback_hook()]
** interfaces.
*/
SQLITE_API void *sqlite3_update_hook(
  sqlite3*, 
  void(*)(void *,int ,char const *,char const *,sqlite3_int64),
  void*
);

/*
** CAPI3REF: Enable Or Disable Shared Pager Cache
**
** ^(This routine enables or disables the sharing of the database cache
** and schema data structures between [database connection | connections]
** to the same database. Sharing is enabled if the argument is true
** and disabled if the argument is false.)^
**
** ^Cache sharing is enabled and disabled for an entire process.
** This is a change as of SQLite version 3.5.0. In prior versions of SQLite,
** sharing was enabled or disabled for each thread separately.
**
** ^(The cache sharing mode set by this interface effects all subsequent
** calls to [sqlite3_open()], [sqlite3_open_v2()], and [sqlite3_open16()].
** Existing database connections continue use the sharing mode
** that was in effect at the time they were opened.)^
**
** ^(This routine returns [SQLITE_OK] if shared cache was enabled or disabled
** successfully.  An [error code] is returned otherwise.)^
**
** ^Shared cache is disabled by default. But this might change in
** future releases of SQLite.  Applications that care about shared
** cache setting should set it explicitly.
**
** This interface is threadsafe on processors where writing a
** 32-bit integer is atomic.
**
** See Also:  [SQLite Shared-Cache Mode]
*/
SQLITE_API int sqlite3_enable_shared_cache(int);

/*
** CAPI3REF: Attempt To Free Heap Memory
**
** ^The sqlite3_release_memory() interface attempts to free N bytes
** of heap memory by deallocating non-essential memory allocations
** held by the database library.   Memory used to cache database
** pages to improve performance is an example of non-essential memory.
** ^sqlite3_release_memory() returns the number of bytes actually freed,
** which might be more or less than the amount requested.
** ^The sqlite3_release_memory() routine is a no-op returning zero
** if SQLite is not compiled with [SQLITE_ENABLE_MEMORY_MANAGEMENT].
**
** See also: [sqlite3_db_release_memory()]
*/
SQLITE_API int sqlite3_release_memory(int);

/*
** CAPI3REF: Free Memory Used By A Database Connection
**
** ^The sqlite3_db_release_memory(D) interface attempts to free as much heap
** memory as possible from database connection D. Unlike the
** [sqlite3_release_memory()] interface, this interface is in effect even
** when the [SQLITE_ENABLE_MEMORY_MANAGEMENT] compile-time option is
** omitted.
**
** See also: [sqlite3_release_memory()]
*/
SQLITE_API int sqlite3_db_release_memory(sqlite3*);

/*
** CAPI3REF: Impose A Limit On Heap Size
**
** ^The sqlite3_soft_heap_limit64() interface sets and/or queries the
** soft limit on the amount of heap memory that may be allocated by SQLite.
** ^SQLite strives to keep heap memory utilization below the soft heap
** limit by reducing the number of pages held in the page cache
** as heap memory usages approaches the limit.
** ^The soft heap limit is "soft" because even though SQLite strives to stay
** below the limit, it will exceed the limit rather than generate
** an [SQLITE_NOMEM] error.  In other words, the soft heap limit 
** is advisory only.
**
** ^The return value from sqlite3_soft_heap_limit64() is the size of
** the soft heap limit prior to the call, or negative in the case of an
** error.  ^If the argument N is negative
** then no change is made to the soft heap limit.  Hence, the current
** size of the soft heap limit can be determined by invoking
** sqlite3_soft_heap_limit64() with a negative argument.
**
** ^If the argument N is zero then the soft heap limit is disabled.
**
** ^(The soft heap limit is not enforced in the current implementation
** if one or more of following conditions are true:
**
** <ul>
** <li> The soft heap limit is set to zero.
** <li> Memory accounting is disabled using a combination of the
**      [sqlite3_config]([SQLITE_CONFIG_MEMSTATUS],...) start-time option and
**      the [SQLITE_DEFAULT_MEMSTATUS] compile-time option.
** <li> An alternative page cache implementation is specified using
**      [sqlite3_config]([SQLITE_CONFIG_PCACHE2],...).
** <li> The page cache allocates from its own memory pool supplied
**      by [sqlite3_config]([SQLITE_CONFIG_PAGECACHE],...) rather than
**      from the heap.
** </ul>)^
**
** Beginning with SQLite version 3.7.3, the soft heap limit is enforced
** regardless of whether or not the [SQLITE_ENABLE_MEMORY_MANAGEMENT]
** compile-time option is invoked.  With [SQLITE_ENABLE_MEMORY_MANAGEMENT],
** the soft heap limit is enforced on every memory allocation.  Without
** [SQLITE_ENABLE_MEMORY_MANAGEMENT], the soft heap limit is only enforced
** when memory is allocated by the page cache.  Testing suggests that because
** the page cache is the predominate memory user in SQLite, most
** applications will achieve adequate soft heap limit enforcement without
** the use of [SQLITE_ENABLE_MEMORY_MANAGEMENT].
**
** The circumstances under which SQLite will enforce the soft heap limit may
** changes in future releases of SQLite.
*/
SQLITE_API sqlite3_int64 sqlite3_soft_heap_limit64(sqlite3_int64 N);

/*
** CAPI3REF: Deprecated Soft Heap Limit Interface
** DEPRECATED
**
** This is a deprecated version of the [sqlite3_soft_heap_limit64()]
** interface.  This routine is provided for historical compatibility
** only.  All new applications should use the
** [sqlite3_soft_heap_limit64()] interface rather than this one.
*/
SQLITE_API SQLITE_DEPRECATED void sqlite3_soft_heap_limit(int N);


/*
** CAPI3REF: Extract Metadata About A Column Of A Table
**
** ^This routine returns metadata about a specific column of a specific
** database table accessible using the [database connection] handle
** passed as the first function argument.
**
** ^The column is identified by the second, third and fourth parameters to
** this function. ^The second parameter is either the name of the database
** (i.e. "main", "temp", or an attached database) containing the specified
** table or NULL. ^If it is NULL, then all attached databases are searched
** for the table using the same algorithm used by the database engine to
** resolve unqualified table references.
**
** ^The third and fourth parameters to this function are the table and column
** name of the desired column, respectively. Neither of these parameters
** may be NULL.
**
** ^Metadata is returned by writing to the memory locations passed as the 5th
** and subsequent parameters to this function. ^Any of these arguments may be
** NULL, in which case the corresponding element of metadata is omitted.
**
** ^(<blockquote>
** <table border="1">
** <tr><th> Parameter <th> Output<br>Type <th>  Description
**
** <tr><td> 5th <td> const char* <td> Data type
** <tr><td> 6th <td> const char* <td> Name of default collation sequence
** <tr><td> 7th <td> int         <td> True if column has a NOT NULL constraint
** <tr><td> 8th <td> int         <td> True if column is part of the PRIMARY KEY
** <tr><td> 9th <td> int         <td> True if column is [AUTOINCREMENT]
** </table>
** </blockquote>)^
**
** ^The memory pointed to by the character pointers returned for the
** declaration type and collation sequence is valid only until the next
** call to any SQLite API function.
**
** ^If the specified table is actually a view, an [error code] is returned.
**
** ^If the specified column is "rowid", "oid" or "_rowid_" and an
** [INTEGER PRIMARY KEY] column has been explicitly declared, then the output
** parameters are set for the explicitly declared column. ^(If there is no
** explicitly declared [INTEGER PRIMARY KEY] column, then the output
** parameters are set as follows:
**
** <pre>
**     data type: "INTEGER"
**     collation sequence: "BINARY"
**     not null: 0
**     primary key: 1
**     auto increment: 0
** </pre>)^
**
** ^(This function may load one or more schemas from database files. If an
** error occurs during this process, or if the requested table or column
** cannot be found, an [error code] is returned and an error message left
** in the [database connection] (to be retrieved using sqlite3_errmsg()).)^
**
** ^This API is only available if the library was compiled with the
** [SQLITE_ENABLE_COLUMN_METADATA] C-preprocessor symbol defined.
*/
SQLITE_API int sqlite3_table_column_metadata(
  sqlite3 *db,                /* Connection handle */
  const char *zDbName,        /* Database name or NULL */
  const char *zTableName,     /* Table name */
  const char *zColumnName,    /* Column name */
  char const **pzDataType,    /* OUTPUT: Declared data type */
  char const **pzCollSeq,     /* OUTPUT: Collation sequence name */
  int *pNotNull,              /* OUTPUT: True if NOT NULL constraint exists */
  int *pPrimaryKey,           /* OUTPUT: True if column part of PK */
  int *pAutoinc               /* OUTPUT: True if column is auto-increment */
);

/*
** CAPI3REF: Load An Extension
**
** ^This interface loads an SQLite extension library from the named file.
**
** ^The sqlite3_load_extension() interface attempts to load an
** [SQLite extension] library contained in the file zFile.  If
** the file cannot be loaded directly, attempts are made to load
** with various operating-system specific extensions added.
** So for example, if "samplelib" cannot be loaded, then names like
** "samplelib.so" or "samplelib.dylib" or "samplelib.dll" might
** be tried also.
**
** ^The entry point is zProc.
** ^(zProc may be 0, in which case SQLite will try to come up with an
** entry point name on its own.  It first tries "sqlite3_extension_init".
** If that does not work, it constructs a name "sqlite3_X_init" where the
** X is consists of the lower-case equivalent of all ASCII alphabetic
** characters in the filename from the last "/" to the first following
** "." and omitting any initial "lib".)^
** ^The sqlite3_load_extension() interface returns
** [SQLITE_OK] on success and [SQLITE_ERROR] if something goes wrong.
** ^If an error occurs and pzErrMsg is not 0, then the
** [sqlite3_load_extension()] interface shall attempt to
** fill *pzErrMsg with error message text stored in memory
** obtained from [sqlite3_malloc()]. The calling function
** should free this memory by calling [sqlite3_free()].
**
** ^Extension loading must be enabled using
** [sqlite3_enable_load_extension()] prior to calling this API,
** otherwise an error will be returned.
**
** See also the [load_extension() SQL function].
*/
SQLITE_API int sqlite3_load_extension(
  sqlite3 *db,          /* Load the extension into this database connection */
  const char *zFile,    /* Name of the shared library containing extension */
  const char *zProc,    /* Entry point.  Derived from zFile if 0 */
  char **pzErrMsg       /* Put error message here if not 0 */
);

/*
** CAPI3REF: Enable Or Disable Extension Loading
**
** ^So as not to open security holes in older applications that are
** unprepared to deal with [extension loading], and as a means of disabling
** [extension loading] while evaluating user-entered SQL, the following API
** is provided to turn the [sqlite3_load_extension()] mechanism on and off.
**
** ^Extension loading is off by default.
** ^Call the sqlite3_enable_load_extension() routine with onoff==1
** to turn extension loading on and call it with onoff==0 to turn
** it back off again.
*/
SQLITE_API int sqlite3_enable_load_extension(sqlite3 *db, int onoff);

/*
** CAPI3REF: Automatically Load Statically Linked Extensions
**
** ^This interface causes the xEntryPoint() function to be invoked for
** each new [database connection] that is created.  The idea here is that
** xEntryPoint() is the entry point for a statically linked [SQLite extension]
** that is to be automatically loaded into all new database connections.
**
** ^(Even though the function prototype shows that xEntryPoint() takes
** no arguments and returns void, SQLite invokes xEntryPoint() with three
** arguments and expects and integer result as if the signature of the
** entry point where as follows:
**
** <blockquote><pre>
** &nbsp;  int xEntryPoint(
** &nbsp;    sqlite3 *db,
** &nbsp;    const char **pzErrMsg,
** &nbsp;    const struct sqlite3_api_routines *pThunk
** &nbsp;  );
** </pre></blockquote>)^
**
** If the xEntryPoint routine encounters an error, it should make *pzErrMsg
** point to an appropriate error message (obtained from [sqlite3_mprintf()])
** and return an appropriate [error code].  ^SQLite ensures that *pzErrMsg
** is NULL before calling the xEntryPoint().  ^SQLite will invoke
** [sqlite3_free()] on *pzErrMsg after xEntryPoint() returns.  ^If any
** xEntryPoint() returns an error, the [sqlite3_open()], [sqlite3_open16()],
** or [sqlite3_open_v2()] call that provoked the xEntryPoint() will fail.
**
** ^Calling sqlite3_auto_extension(X) with an entry point X that is already
** on the list of automatic extensions is a harmless no-op. ^No entry point
** will be called more than once for each database connection that is opened.
**
** See also: [sqlite3_reset_auto_extension()]
** and [sqlite3_cancel_auto_extension()]
*/
SQLITE_API int sqlite3_auto_extension(void (*xEntryPoint)(void));

/*
** CAPI3REF: Cancel Automatic Extension Loading
**
** ^The [sqlite3_cancel_auto_extension(X)] interface unregisters the
** initialization routine X that was registered using a prior call to
** [sqlite3_auto_extension(X)].  ^The [sqlite3_cancel_auto_extension(X)]
** routine returns 1 if initialization routine X was successfully 
** unregistered and it returns 0 if X was not on the list of initialization
** routines.
*/
SQLITE_API int sqlite3_cancel_auto_extension(void (*xEntryPoint)(void));

/*
** CAPI3REF: Reset Automatic Extension Loading
**
** ^This interface disables all automatic extensions previously
** registered using [sqlite3_auto_extension()].
*/
SQLITE_API void sqlite3_reset_auto_extension(void);

/*
** The interface to the virtual-table mechanism is currently considered
** to be experimental.  The interface might change in incompatible ways.
** If this is a problem for you, do not use the interface at this time.
**
** When the virtual-table mechanism stabilizes, we will declare the
** interface fixed, support it indefinitely, and remove this comment.
*/

/*
** Structures used by the virtual table interface
*/
typedef struct sqlite3_vtab sqlite3_vtab;
typedef struct sqlite3_index_info sqlite3_index_info;
typedef struct sqlite3_vtab_cursor sqlite3_vtab_cursor;
typedef struct sqlite3_module sqlite3_module;

/*
** CAPI3REF: Virtual Table Object
** KEYWORDS: sqlite3_module {virtual table module}
**
** This structure, sometimes called a "virtual table module", 
** defines the implementation of a [virtual tables].  
** This structure consists mostly of methods for the module.
**
** ^A virtual table module is created by filling in a persistent
** instance of this structure and passing a pointer to that instance
** to [sqlite3_create_module()] or [sqlite3_create_module_v2()].
** ^The registration remains valid until it is replaced by a different
** module or until the [database connection] closes.  The content
** of this structure must not change while it is registered with
** any database connection.
*/
struct sqlite3_module {
  int iVersion;
  int (*xCreate)(sqlite3*, void *pAux,
               int argc, const char *const*argv,
               sqlite3_vtab **ppVTab, char**);
  int (*xConnect)(sqlite3*, void *pAux,
               int argc, const char *const*argv,
               sqlite3_vtab **ppVTab, char**);
  int (*xBestIndex)(sqlite3_vtab *pVTab, sqlite3_index_info*);
  int (*xDisconnect)(sqlite3_vtab *pVTab);
  int (*xDestroy)(sqlite3_vtab *pVTab);
  int (*xOpen)(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor);
  int (*xClose)(sqlite3_vtab_cursor*);
  int (*xFilter)(sqlite3_vtab_cursor*, int idxNum, const char *idxStr,
                int argc, sqlite3_value **argv);
  int (*xNext)(sqlite3_vtab_cursor*);
  int (*xEof)(sqlite3_vtab_cursor*);
  int (*xColumn)(sqlite3_vtab_cursor*, sqlite3_context*, int);
  int (*xRowid)(sqlite3_vtab_cursor*, sqlite3_int64 *pRowid);
  int (*xUpdate)(sqlite3_vtab *, int, sqlite3_value **, sqlite3_int64 *);
  int (*xBegin)(sqlite3_vtab *pVTab);
  int (*xSync)(sqlite3_vtab *pVTab);
  int (*xCommit)(sqlite3_vtab *pVTab);
  int (*xRollback)(sqlite3_vtab *pVTab);
  int (*xFindFunction)(sqlite3_vtab *pVtab, int nArg, const char *zName,
                       void (**pxFunc)(sqlite3_context*,int,sqlite3_value**),
                       void **ppArg);
  int (*xRename)(sqlite3_vtab *pVtab, const char *zNew);
  /* The methods above are in version 1 of the sqlite_module object. Those 
  ** below are for version 2 and greater. */
  int (*xSavepoint)(sqlite3_vtab *pVTab, int);
  int (*xRelease)(sqlite3_vtab *pVTab, int);
  int (*xRollbackTo)(sqlite3_vtab *pVTab, int);
};

/*
** CAPI3REF: Virtual Table Indexing Information
** KEYWORDS: sqlite3_index_info
**
** The sqlite3_index_info structure and its substructures is used as part
** of the [virtual table] interface to
** pass information into and receive the reply from the [xBestIndex]
** method of a [virtual table module].  The fields under **Inputs** are the
** inputs to xBestIndex and are read-only.  xBestIndex inserts its
** results into the **Outputs** fields.
**
** ^(The aConstraint[] array records WHERE clause constraints of the form:
**
** <blockquote>column OP expr</blockquote>
**
** where OP is =, &lt;, &lt;=, &gt;, or &gt;=.)^  ^(The particular operator is
** stored in aConstraint[].op using one of the
** [SQLITE_INDEX_CONSTRAINT_EQ | SQLITE_INDEX_CONSTRAINT_ values].)^
** ^(The index of the column is stored in
** aConstraint[].iColumn.)^  ^(aConstraint[].usable is TRUE if the
** expr on the right-hand side can be evaluated (and thus the constraint
** is usable) and false if it cannot.)^
**
** ^The optimizer automatically inverts terms of the form "expr OP column"
** and makes other simplifications to the WHERE clause in an attempt to
** get as many WHERE clause terms into the form shown above as possible.
** ^The aConstraint[] array only reports WHERE clause terms that are
** relevant to the particular virtual table being queried.
**
** ^Information about the ORDER BY clause is stored in aOrderBy[].
** ^Each term of aOrderBy records a column of the ORDER BY clause.
**
** The [xBestIndex] method must fill aConstraintUsage[] with information
** about what parameters to pass to xFilter.  ^If argvIndex>0 then
** the right-hand side of the corresponding aConstraint[] is evaluated
** and becomes the argvIndex-th entry in argv.  ^(If aConstraintUsage[].omit
** is true, then the constraint is assumed to be fully handled by the
** virtual table and is not checked again by SQLite.)^
**
** ^The idxNum and idxPtr values are recorded and passed into the
** [xFilter] method.
** ^[sqlite3_free()] is used to free idxPtr if and only if
** needToFreeIdxPtr is true.
**
** ^The orderByConsumed means that output from [xFilter]/[xNext] will occur in
** the correct order to satisfy the ORDER BY clause so that no separate
** sorting step is required.
**
** ^The estimatedCost value is an estimate of the cost of a particular
** strategy. A cost of N indicates that the cost of the strategy is similar
** to a linear scan of an SQLite table with N rows. A cost of log(N) 
** indicates that the expense of the operation is similar to that of a
** binary search on a unique indexed field of an SQLite table with N rows.
**
** ^The estimatedRows value is an estimate of the number of rows that
** will be returned by the strategy.
**
** IMPORTANT: The estimatedRows field was added to the sqlite3_index_info
** structure for SQLite version 3.8.2. If a virtual table extension is
** used with an SQLite version earlier than 3.8.2, the results of attempting 
** to read or write the estimatedRows field are undefined (but are likely 
** to included crashing the application). The estimatedRows field should
** therefore only be used if [sqlite3_libversion_number()] returns a
** value greater than or equal to 3008002.
*/
struct sqlite3_index_info {
  /* Inputs */
  int nConstraint;           /* Number of entries in aConstraint */
  struct sqlite3_index_constraint {
     int iColumn;              /* Column on left-hand side of constraint */
     unsigned char op;         /* Constraint operator */
     unsigned char usable;     /* True if this constraint is usable */
     int iTermOffset;          /* Used internally - xBestIndex should ignore */
  } *aConstraint;            /* Table of WHERE clause constraints */
  int nOrderBy;              /* Number of terms in the ORDER BY clause */
  struct sqlite3_index_orderby {
     int iColumn;              /* Column number */
     unsigned char desc;       /* True for DESC.  False for ASC. */
  } *aOrderBy;               /* The ORDER BY clause */
  /* Outputs */
  struct sqlite3_index_constraint_usage {
    int argvIndex;           /* if >0, constraint is part of argv to xFilter */
    unsigned char omit;      /* Do not code a test for this constraint */
  } *aConstraintUsage;
  int idxNum;                /* Number used to identify the index */
  char *idxStr;              /* String, possibly obtained from sqlite3_malloc */
  int needToFreeIdxStr;      /* Free idxStr using sqlite3_free() if true */
  int orderByConsumed;       /* True if output is already ordered */
  double estimatedCost;           /* Estimated cost of using this index */
  /* Fields below are only available in SQLite 3.8.2 and later */
  sqlite3_int64 estimatedRows;    /* Estimated number of rows returned */
};

/*
** CAPI3REF: Virtual Table Constraint Operator Codes
**
** These macros defined the allowed values for the
** [sqlite3_index_info].aConstraint[].op field.  Each value represents
** an operator that is part of a constraint term in the wHERE clause of
** a query that uses a [virtual table].
*/
#define SQLITE_INDEX_CONSTRAINT_EQ    2
#define SQLITE_INDEX_CONSTRAINT_GT    4
#define SQLITE_INDEX_CONSTRAINT_LE    8
#define SQLITE_INDEX_CONSTRAINT_LT    16
#define SQLITE_INDEX_CONSTRAINT_GE    32
#define SQLITE_INDEX_CONSTRAINT_MATCH 64

/*
** CAPI3REF: Register A Virtual Table Implementation
**
** ^These routines are used to register a new [virtual table module] name.
** ^Module names must be registered before
** creating a new [virtual table] using the module and before using a
** preexisting [virtual table] for the module.
**
** ^The module name is registered on the [database connection] specified
** by the first parameter.  ^The name of the module is given by the 
** second parameter.  ^The third parameter is a pointer to
** the implementation of the [virtual table module].   ^The fourth
** parameter is an arbitrary client data pointer that is passed through
** into the [xCreate] and [xConnect] methods of the virtual table module
** when a new virtual table is be being created or reinitialized.
**
** ^The sqlite3_create_module_v2() interface has a fifth parameter which
** is a pointer to a destructor for the pClientData.  ^SQLite will
** invoke the destructor function (if it is not NULL) when SQLite
** no longer needs the pClientData pointer.  ^The destructor will also
** be invoked if the call to sqlite3_create_module_v2() fails.
** ^The sqlite3_create_module()
** interface is equivalent to sqlite3_create_module_v2() with a NULL
** destructor.
*/
SQLITE_API int sqlite3_create_module(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *p,   /* Methods for the module */
  void *pClientData          /* Client data for xCreate/xConnect */
);
SQLITE_API int sqlite3_create_module_v2(
  sqlite3 *db,               /* SQLite connection to register module with */
  const char *zName,         /* Name of the module */
  const sqlite3_module *p,   /* Methods for the module */
  void *pClientData,         /* Client data for xCreate/xConnect */
  void(*xDestroy)(void*)     /* Module destructor function */
);

/*
** CAPI3REF: Virtual Table Instance Object
** KEYWORDS: sqlite3_vtab
**
** Every [virtual table module] implementation uses a subclass
** of this object to describe a particular instance
** of the [virtual table].  Each subclass will
** be tailored to the specific needs of the module implementation.
** The purpose of this superclass is to define certain fields that are
** common to all module implementations.
**
** ^Virtual tables methods can set an error message by assigning a
** string obtained from [sqlite3_mprintf()] to zErrMsg.  The method should
** take care that any prior string is freed by a call to [sqlite3_free()]
** prior to assigning a new string to zErrMsg.  ^After the error message
** is delivered up to the client application, the string will be automatically
** freed by sqlite3_free() and the zErrMsg field will be zeroed.
*/
struct sqlite3_vtab {
  const sqlite3_module *pModule;  /* The module for this virtual table */
  int nRef;                       /* NO LONGER USED */
  char *zErrMsg;                  /* Error message from sqlite3_mprintf() */
  /* Virtual table implementations will typically add additional fields */
};

/*
** CAPI3REF: Virtual Table Cursor Object
** KEYWORDS: sqlite3_vtab_cursor {virtual table cursor}
**
** Every [virtual table module] implementation uses a subclass of the
** following structure to describe cursors that point into the
** [virtual table] and are used
** to loop through the virtual table.  Cursors are created using the
** [sqlite3_module.xOpen | xOpen] method of the module and are destroyed
** by the [sqlite3_module.xClose | xClose] method.  Cursors are used
** by the [xFilter], [xNext], [xEof], [xColumn], and [xRowid] methods
** of the module.  Each module implementation will define
** the content of a cursor structure to suit its own needs.
**
** This superclass exists in order to define fields of the cursor that
** are common to all implementations.
*/
struct sqlite3_vtab_cursor {
  sqlite3_vtab *pVtab;      /* Virtual table of this cursor */
  /* Virtual table implementations will typically add additional fields */
};

/*
** CAPI3REF: Declare The Schema Of A Virtual Table
**
** ^The [xCreate] and [xConnect] methods of a
** [virtual table module] call this interface
** to declare the format (the names and datatypes of the columns) of
** the virtual tables they implement.
*/
SQLITE_API int sqlite3_declare_vtab(sqlite3*, const char *zSQL);

/*
** CAPI3REF: Overload A Function For A Virtual Table
**
** ^(Virtual tables can provide alternative implementations of functions
** using the [xFindFunction] method of the [virtual table module].  
** But global versions of those functions
** must exist in order to be overloaded.)^
**
** ^(This API makes sure a global version of a function with a particular
** name and number of parameters exists.  If no such function exists
** before this API is called, a new function is created.)^  ^The implementation
** of the new function always causes an exception to be thrown.  So
** the new function is not good for anything by itself.  Its only
** purpose is to be a placeholder function that can be overloaded
** by a [virtual table].
*/
SQLITE_API int sqlite3_overload_function(sqlite3*, const char *zFuncName, int nArg);

/*
** The interface to the virtual-table mechanism defined above (back up
** to a comment remarkably similar to this one) is currently considered
** to be experimental.  The interface might change in incompatible ways.
** If this is a problem for you, do not use the interface at this time.
**
** When the virtual-table mechanism stabilizes, we will declare the
** interface fixed, support it indefinitely, and remove this comment.
*/

/*
** CAPI3REF: A Handle To An Open BLOB
** KEYWORDS: {BLOB handle} {BLOB handles}
**
** An instance of this object represents an open BLOB on which
** [sqlite3_blob_open | incremental BLOB I/O] can be performed.
** ^Objects of this type are created by [sqlite3_blob_open()]
** and destroyed by [sqlite3_blob_close()].
** ^The [sqlite3_blob_read()] and [sqlite3_blob_write()] interfaces
** can be used to read or write small subsections of the BLOB.
** ^The [sqlite3_blob_bytes()] interface returns the size of the BLOB in bytes.
*/
typedef struct sqlite3_blob sqlite3_blob;

/*
** CAPI3REF: Open A BLOB For Incremental I/O
**
** ^(This interfaces opens a [BLOB handle | handle] to the BLOB located
** in row iRow, column zColumn, table zTable in database zDb;
** in other words, the same BLOB that would be selected by:
**
** <pre>
**     SELECT zColumn FROM zDb.zTable WHERE [rowid] = iRow;
** </pre>)^
**
** ^If the flags parameter is non-zero, then the BLOB is opened for read
** and write access. ^If it is zero, the BLOB is opened for read access.
** ^It is not possible to open a column that is part of an index or primary 
** key for writing. ^If [foreign key constraints] are enabled, it is 
** not possible to open a column that is part of a [child key] for writing.
**
** ^Note that the database name is not the filename that contains
** the database but rather the symbolic name of the database that
** appears after the AS keyword when the database is connected using [ATTACH].
** ^For the main database file, the database name is "main".
** ^For TEMP tables, the database name is "temp".
**
** ^(On success, [SQLITE_OK] is returned and the new [BLOB handle] is written
** to *ppBlob. Otherwise an [error code] is returned and *ppBlob is set
** to be a null pointer.)^
** ^This function sets the [database connection] error code and message
** accessible via [sqlite3_errcode()] and [sqlite3_errmsg()] and related
** functions. ^Note that the *ppBlob variable is always initialized in a
** way that makes it safe to invoke [sqlite3_blob_close()] on *ppBlob
** regardless of the success or failure of this routine.
**
** ^(If the row that a BLOB handle points to is modified by an
** [UPDATE], [DELETE], or by [ON CONFLICT] side-effects
** then the BLOB handle is marked as "expired".
** This is true if any column of the row is changed, even a column
** other than the one the BLOB handle is open on.)^
** ^Calls to [sqlite3_blob_read()] and [sqlite3_blob_write()] for
** an expired BLOB handle fail with a return code of [SQLITE_ABORT].
** ^(Changes written into a BLOB prior to the BLOB expiring are not
** rolled back by the expiration of the BLOB.  Such changes will eventually
** commit if the transaction continues to completion.)^
**
** ^Use the [sqlite3_blob_bytes()] interface to determine the size of
** the opened blob.  ^The size of a blob may not be changed by this
** interface.  Use the [UPDATE] SQL command to change the size of a
** blob.
**
** ^The [sqlite3_blob_open()] interface will fail for a [WITHOUT ROWID]
** table.  Incremental BLOB I/O is not possible on [WITHOUT ROWID] tables.
**
** ^The [sqlite3_bind_zeroblob()] and [sqlite3_result_zeroblob()] interfaces
** and the built-in [zeroblob] SQL function can be used, if desired,
** to create an empty, zero-filled blob in which to read or write using
** this interface.
**
** To avoid a resource leak, every open [BLOB handle] should eventually
** be released by a call to [sqlite3_blob_close()].
*/
SQLITE_API int sqlite3_blob_open(
  sqlite3*,
  const char *zDb,
  const char *zTable,
  const char *zColumn,
  sqlite3_int64 iRow,
  int flags,
  sqlite3_blob **ppBlob
);

/*
** CAPI3REF: Move a BLOB Handle to a New Row
**
** ^This function is used to move an existing blob handle so that it points
** to a different row of the same database table. ^The new row is identified
** by the rowid value passed as the second argument. Only the row can be
** changed. ^The database, table and column on which the blob handle is open
** remain the same. Moving an existing blob handle to a new row can be
** faster than closing the existing handle and opening a new one.
**
** ^(The new row must meet the same criteria as for [sqlite3_blob_open()] -
** it must exist and there must be either a blob or text value stored in
** the nominated column.)^ ^If the new row is not present in the table, or if
** it does not contain a blob or text value, or if another error occurs, an
** SQLite error code is returned and the blob handle is considered aborted.
** ^All subsequent calls to [sqlite3_blob_read()], [sqlite3_blob_write()] or
** [sqlite3_blob_reopen()] on an aborted blob handle immediately return
** SQLITE_ABORT. ^Calling [sqlite3_blob_bytes()] on an aborted blob handle
** always returns zero.
**
** ^This function sets the database handle error code and message.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_blob_reopen(sqlite3_blob *, sqlite3_int64);

/*
** CAPI3REF: Close A BLOB Handle
**
** ^Closes an open [BLOB handle].
**
** ^Closing a BLOB shall cause the current transaction to commit
** if there are no other BLOBs, no pending prepared statements, and the
** database connection is in [autocommit mode].
** ^If any writes were made to the BLOB, they might be held in cache
** until the close operation if they will fit.
**
** ^(Closing the BLOB often forces the changes
** out to disk and so if any I/O errors occur, they will likely occur
** at the time when the BLOB is closed.  Any errors that occur during
** closing are reported as a non-zero return value.)^
**
** ^(The BLOB is closed unconditionally.  Even if this routine returns
** an error code, the BLOB is still closed.)^
**
** ^Calling this routine with a null pointer (such as would be returned
** by a failed call to [sqlite3_blob_open()]) is a harmless no-op.
*/
SQLITE_API int sqlite3_blob_close(sqlite3_blob *);

/*
** CAPI3REF: Return The Size Of An Open BLOB
**
** ^Returns the size in bytes of the BLOB accessible via the 
** successfully opened [BLOB handle] in its only argument.  ^The
** incremental blob I/O routines can only read or overwriting existing
** blob content; they cannot change the size of a blob.
**
** This routine only works on a [BLOB handle] which has been created
** by a prior successful call to [sqlite3_blob_open()] and which has not
** been closed by [sqlite3_blob_close()].  Passing any other pointer in
** to this routine results in undefined and probably undesirable behavior.
*/
SQLITE_API int sqlite3_blob_bytes(sqlite3_blob *);

/*
** CAPI3REF: Read Data From A BLOB Incrementally
**
** ^(This function is used to read data from an open [BLOB handle] into a
** caller-supplied buffer. N bytes of data are copied into buffer Z
** from the open BLOB, starting at offset iOffset.)^
**
** ^If offset iOffset is less than N bytes from the end of the BLOB,
** [SQLITE_ERROR] is returned and no data is read.  ^If N or iOffset is
** less than zero, [SQLITE_ERROR] is returned and no data is read.
** ^The size of the blob (and hence the maximum value of N+iOffset)
** can be determined using the [sqlite3_blob_bytes()] interface.
**
** ^An attempt to read from an expired [BLOB handle] fails with an
** error code of [SQLITE_ABORT].
**
** ^(On success, sqlite3_blob_read() returns SQLITE_OK.
** Otherwise, an [error code] or an [extended error code] is returned.)^
**
** This routine only works on a [BLOB handle] which has been created
** by a prior successful call to [sqlite3_blob_open()] and which has not
** been closed by [sqlite3_blob_close()].  Passing any other pointer in
** to this routine results in undefined and probably undesirable behavior.
**
** See also: [sqlite3_blob_write()].
*/
SQLITE_API int sqlite3_blob_read(sqlite3_blob *, void *Z, int N, int iOffset);

/*
** CAPI3REF: Write Data Into A BLOB Incrementally
**
** ^This function is used to write data into an open [BLOB handle] from a
** caller-supplied buffer. ^N bytes of data are copied from the buffer Z
** into the open BLOB, starting at offset iOffset.
**
** ^If the [BLOB handle] passed as the first argument was not opened for
** writing (the flags parameter to [sqlite3_blob_open()] was zero),
** this function returns [SQLITE_READONLY].
**
** ^This function may only modify the contents of the BLOB; it is
** not possible to increase the size of a BLOB using this API.
** ^If offset iOffset is less than N bytes from the end of the BLOB,
** [SQLITE_ERROR] is returned and no data is written.  ^If N is
** less than zero [SQLITE_ERROR] is returned and no data is written.
** The size of the BLOB (and hence the maximum value of N+iOffset)
** can be determined using the [sqlite3_blob_bytes()] interface.
**
** ^An attempt to write to an expired [BLOB handle] fails with an
** error code of [SQLITE_ABORT].  ^Writes to the BLOB that occurred
** before the [BLOB handle] expired are not rolled back by the
** expiration of the handle, though of course those changes might
** have been overwritten by the statement that expired the BLOB handle
** or by other independent statements.
**
** ^(On success, sqlite3_blob_write() returns SQLITE_OK.
** Otherwise, an  [error code] or an [extended error code] is returned.)^
**
** This routine only works on a [BLOB handle] which has been created
** by a prior successful call to [sqlite3_blob_open()] and which has not
** been closed by [sqlite3_blob_close()].  Passing any other pointer in
** to this routine results in undefined and probably undesirable behavior.
**
** See also: [sqlite3_blob_read()].
*/
SQLITE_API int sqlite3_blob_write(sqlite3_blob *, const void *z, int n, int iOffset);

/*
** CAPI3REF: Virtual File System Objects
**
** A virtual filesystem (VFS) is an [sqlite3_vfs] object
** that SQLite uses to interact
** with the underlying operating system.  Most SQLite builds come with a
** single default VFS that is appropriate for the host computer.
** New VFSes can be registered and existing VFSes can be unregistered.
** The following interfaces are provided.
**
** ^The sqlite3_vfs_find() interface returns a pointer to a VFS given its name.
** ^Names are case sensitive.
** ^Names are zero-terminated UTF-8 strings.
** ^If there is no match, a NULL pointer is returned.
** ^If zVfsName is NULL then the default VFS is returned.
**
** ^New VFSes are registered with sqlite3_vfs_register().
** ^Each new VFS becomes the default VFS if the makeDflt flag is set.
** ^The same VFS can be registered multiple times without injury.
** ^To make an existing VFS into the default VFS, register it again
** with the makeDflt flag set.  If two different VFSes with the
** same name are registered, the behavior is undefined.  If a
** VFS is registered with a name that is NULL or an empty string,
** then the behavior is undefined.
**
** ^Unregister a VFS with the sqlite3_vfs_unregister() interface.
** ^(If the default VFS is unregistered, another VFS is chosen as
** the default.  The choice for the new VFS is arbitrary.)^
*/
SQLITE_API sqlite3_vfs *sqlite3_vfs_find(const char *zVfsName);
SQLITE_API int sqlite3_vfs_register(sqlite3_vfs*, int makeDflt);
SQLITE_API int sqlite3_vfs_unregister(sqlite3_vfs*);

/*
** CAPI3REF: Mutexes
**
** The SQLite core uses these routines for thread
** synchronization. Though they are intended for internal
** use by SQLite, code that links against SQLite is
** permitted to use any of these routines.
**
** The SQLite source code contains multiple implementations
** of these mutex routines.  An appropriate implementation
** is selected automatically at compile-time.  ^(The following
** implementations are available in the SQLite core:
**
** <ul>
** <li>   SQLITE_MUTEX_PTHREADS
** <li>   SQLITE_MUTEX_W32
** <li>   SQLITE_MUTEX_NOOP
** </ul>)^
**
** ^The SQLITE_MUTEX_NOOP implementation is a set of routines
** that does no real locking and is appropriate for use in
** a single-threaded application.  ^The SQLITE_MUTEX_PTHREADS and
** SQLITE_MUTEX_W32 implementations are appropriate for use on Unix
** and Windows.
**
** ^(If SQLite is compiled with the SQLITE_MUTEX_APPDEF preprocessor
** macro defined (with "-DSQLITE_MUTEX_APPDEF=1"), then no mutex
** implementation is included with the library. In this case the
** application must supply a custom mutex implementation using the
** [SQLITE_CONFIG_MUTEX] option of the sqlite3_config() function
** before calling sqlite3_initialize() or any other public sqlite3_
** function that calls sqlite3_initialize().)^
**
** ^The sqlite3_mutex_alloc() routine allocates a new
** mutex and returns a pointer to it. ^If it returns NULL
** that means that a mutex could not be allocated.  ^SQLite
** will unwind its stack and return an error.  ^(The argument
** to sqlite3_mutex_alloc() is one of these integer constants:
**
** <ul>
** <li>  SQLITE_MUTEX_FAST
** <li>  SQLITE_MUTEX_RECURSIVE
** <li>  SQLITE_MUTEX_STATIC_MASTER
** <li>  SQLITE_MUTEX_STATIC_MEM
** <li>  SQLITE_MUTEX_STATIC_MEM2
** <li>  SQLITE_MUTEX_STATIC_PRNG
** <li>  SQLITE_MUTEX_STATIC_LRU
** <li>  SQLITE_MUTEX_STATIC_LRU2
** </ul>)^
**
** ^The first two constants (SQLITE_MUTEX_FAST and SQLITE_MUTEX_RECURSIVE)
** cause sqlite3_mutex_alloc() to create
** a new mutex.  ^The new mutex is recursive when SQLITE_MUTEX_RECURSIVE
** is used but not necessarily so when SQLITE_MUTEX_FAST is used.
** The mutex implementation does not need to make a distinction
** between SQLITE_MUTEX_RECURSIVE and SQLITE_MUTEX_FAST if it does
** not want to.  ^SQLite will only request a recursive mutex in
** cases where it really needs one.  ^If a faster non-recursive mutex
** implementation is available on the host platform, the mutex subsystem
** might return such a mutex in response to SQLITE_MUTEX_FAST.
**
** ^The other allowed parameters to sqlite3_mutex_alloc() (anything other
** than SQLITE_MUTEX_FAST and SQLITE_MUTEX_RECURSIVE) each return
** a pointer to a static preexisting mutex.  ^Six static mutexes are
** used by the current version of SQLite.  Future versions of SQLite
** may add additional static mutexes.  Static mutexes are for internal
** use by SQLite only.  Applications that use SQLite mutexes should
** use only the dynamic mutexes returned by SQLITE_MUTEX_FAST or
** SQLITE_MUTEX_RECURSIVE.
**
** ^Note that if one of the dynamic mutex parameters (SQLITE_MUTEX_FAST
** or SQLITE_MUTEX_RECURSIVE) is used then sqlite3_mutex_alloc()
** returns a different mutex on every call.  ^But for the static
** mutex types, the same mutex is returned on every call that has
** the same type number.
**
** ^The sqlite3_mutex_free() routine deallocates a previously
** allocated dynamic mutex.  ^SQLite is careful to deallocate every
** dynamic mutex that it allocates.  The dynamic mutexes must not be in
** use when they are deallocated.  Attempting to deallocate a static
** mutex results in undefined behavior.  ^SQLite never deallocates
** a static mutex.
**
** ^The sqlite3_mutex_enter() and sqlite3_mutex_try() routines attempt
** to enter a mutex.  ^If another thread is already within the mutex,
** sqlite3_mutex_enter() will block and sqlite3_mutex_try() will return
** SQLITE_BUSY.  ^The sqlite3_mutex_try() interface returns [SQLITE_OK]
** upon successful entry.  ^(Mutexes created using
** SQLITE_MUTEX_RECURSIVE can be entered multiple times by the same thread.
** In such cases the,
** mutex must be exited an equal number of times before another thread
** can enter.)^  ^(If the same thread tries to enter any other
** kind of mutex more than once, the behavior is undefined.
** SQLite will never exhibit
** such behavior in its own use of mutexes.)^
**
** ^(Some systems (for example, Windows 95) do not support the operation
** implemented by sqlite3_mutex_try().  On those systems, sqlite3_mutex_try()
** will always return SQLITE_BUSY.  The SQLite core only ever uses
** sqlite3_mutex_try() as an optimization so this is acceptable behavior.)^
**
** ^The sqlite3_mutex_leave() routine exits a mutex that was
** previously entered by the same thread.   ^(The behavior
** is undefined if the mutex is not currently entered by the
** calling thread or is not currently allocated.  SQLite will
** never do either.)^
**
** ^If the argument to sqlite3_mutex_enter(), sqlite3_mutex_try(), or
** sqlite3_mutex_leave() is a NULL pointer, then all three routines
** behave as no-ops.
**
** See also: [sqlite3_mutex_held()] and [sqlite3_mutex_notheld()].
*/
SQLITE_API sqlite3_mutex *sqlite3_mutex_alloc(int);
SQLITE_API void sqlite3_mutex_free(sqlite3_mutex*);
SQLITE_API void sqlite3_mutex_enter(sqlite3_mutex*);
SQLITE_API int sqlite3_mutex_try(sqlite3_mutex*);
SQLITE_API void sqlite3_mutex_leave(sqlite3_mutex*);

/*
** CAPI3REF: Mutex Methods Object
**
** An instance of this structure defines the low-level routines
** used to allocate and use mutexes.
**
** Usually, the default mutex implementations provided by SQLite are
** sufficient, however the user has the option of substituting a custom
** implementation for specialized deployments or systems for which SQLite
** does not provide a suitable implementation. In this case, the user
** creates and populates an instance of this structure to pass
** to sqlite3_config() along with the [SQLITE_CONFIG_MUTEX] option.
** Additionally, an instance of this structure can be used as an
** output variable when querying the system for the current mutex
** implementation, using the [SQLITE_CONFIG_GETMUTEX] option.
**
** ^The xMutexInit method defined by this structure is invoked as
** part of system initialization by the sqlite3_initialize() function.
** ^The xMutexInit routine is called by SQLite exactly once for each
** effective call to [sqlite3_initialize()].
**
** ^The xMutexEnd method defined by this structure is invoked as
** part of system shutdown by the sqlite3_shutdown() function. The
** implementation of this method is expected to release all outstanding
** resources obtained by the mutex methods implementation, especially
** those obtained by the xMutexInit method.  ^The xMutexEnd()
** interface is invoked exactly once for each call to [sqlite3_shutdown()].
**
** ^(The remaining seven methods defined by this structure (xMutexAlloc,
** xMutexFree, xMutexEnter, xMutexTry, xMutexLeave, xMutexHeld and
** xMutexNotheld) implement the following interfaces (respectively):
**
** <ul>
**   <li>  [sqlite3_mutex_alloc()] </li>
**   <li>  [sqlite3_mutex_free()] </li>
**   <li>  [sqlite3_mutex_enter()] </li>
**   <li>  [sqlite3_mutex_try()] </li>
**   <li>  [sqlite3_mutex_leave()] </li>
**   <li>  [sqlite3_mutex_held()] </li>
**   <li>  [sqlite3_mutex_notheld()] </li>
** </ul>)^
**
** The only difference is that the public sqlite3_XXX functions enumerated
** above silently ignore any invocations that pass a NULL pointer instead
** of a valid mutex handle. The implementations of the methods defined
** by this structure are not required to handle this case, the results
** of passing a NULL pointer instead of a valid mutex handle are undefined
** (i.e. it is acceptable to provide an implementation that segfaults if
** it is passed a NULL pointer).
**
** The xMutexInit() method must be threadsafe.  ^It must be harmless to
** invoke xMutexInit() multiple times within the same process and without
** intervening calls to xMutexEnd().  Second and subsequent calls to
** xMutexInit() must be no-ops.
**
** ^xMutexInit() must not use SQLite memory allocation ([sqlite3_malloc()]
** and its associates).  ^Similarly, xMutexAlloc() must not use SQLite memory
** allocation for a static mutex.  ^However xMutexAlloc() may use SQLite
** memory allocation for a fast or recursive mutex.
**
** ^SQLite will invoke the xMutexEnd() method when [sqlite3_shutdown()] is
** called, but only if the prior call to xMutexInit returned SQLITE_OK.
** If xMutexInit fails in any way, it is expected to clean up after itself
** prior to returning.
*/
typedef struct sqlite3_mutex_methods sqlite3_mutex_methods;
struct sqlite3_mutex_methods {
  int (*xMutexInit)(void);
  int (*xMutexEnd)(void);
  sqlite3_mutex *(*xMutexAlloc)(int);
  void (*xMutexFree)(sqlite3_mutex *);
  void (*xMutexEnter)(sqlite3_mutex *);
  int (*xMutexTry)(sqlite3_mutex *);
  void (*xMutexLeave)(sqlite3_mutex *);
  int (*xMutexHeld)(sqlite3_mutex *);
  int (*xMutexNotheld)(sqlite3_mutex *);
};

/*
** CAPI3REF: Mutex Verification Routines
**
** The sqlite3_mutex_held() and sqlite3_mutex_notheld() routines
** are intended for use inside assert() statements.  ^The SQLite core
** never uses these routines except inside an assert() and applications
** are advised to follow the lead of the core.  ^The SQLite core only
** provides implementations for these routines when it is compiled
** with the SQLITE_DEBUG flag.  ^External mutex implementations
** are only required to provide these routines if SQLITE_DEBUG is
** defined and if NDEBUG is not defined.
**
** ^These routines should return true if the mutex in their argument
** is held or not held, respectively, by the calling thread.
**
** ^The implementation is not required to provide versions of these
** routines that actually work. If the implementation does not provide working
** versions of these routines, it should at least provide stubs that always
** return true so that one does not get spurious assertion failures.
**
** ^If the argument to sqlite3_mutex_held() is a NULL pointer then
** the routine should return 1.   This seems counter-intuitive since
** clearly the mutex cannot be held if it does not exist.  But
** the reason the mutex does not exist is because the build is not
** using mutexes.  And we do not want the assert() containing the
** call to sqlite3_mutex_held() to fail, so a non-zero return is
** the appropriate thing to do.  ^The sqlite3_mutex_notheld()
** interface should also return 1 when given a NULL pointer.
*/
#ifndef NDEBUG
SQLITE_API int sqlite3_mutex_held(sqlite3_mutex*);
SQLITE_API int sqlite3_mutex_notheld(sqlite3_mutex*);
#endif

/*
** CAPI3REF: Mutex Types
**
** The [sqlite3_mutex_alloc()] interface takes a single argument
** which is one of these integer constants.
**
** The set of static mutexes may change from one SQLite release to the
** next.  Applications that override the built-in mutex logic must be
** prepared to accommodate additional static mutexes.
*/
#define SQLITE_MUTEX_FAST             0
#define SQLITE_MUTEX_RECURSIVE        1
#define SQLITE_MUTEX_STATIC_MASTER    2
#define SQLITE_MUTEX_STATIC_MEM       3  /* sqlite3_malloc() */
#define SQLITE_MUTEX_STATIC_MEM2      4  /* NOT USED */
#define SQLITE_MUTEX_STATIC_OPEN      4  /* sqlite3BtreeOpen() */
#define SQLITE_MUTEX_STATIC_PRNG      5  /* sqlite3_random() */
#define SQLITE_MUTEX_STATIC_LRU       6  /* lru page list */
#define SQLITE_MUTEX_STATIC_LRU2      7  /* NOT USED */
#define SQLITE_MUTEX_STATIC_PMEM      7  /* sqlite3PageMalloc() */

/*
** CAPI3REF: Retrieve the mutex for a database connection
**
** ^This interface returns a pointer the [sqlite3_mutex] object that 
** serializes access to the [database connection] given in the argument
** when the [threading mode] is Serialized.
** ^If the [threading mode] is Single-thread or Multi-thread then this
** routine returns a NULL pointer.
*/
SQLITE_API sqlite3_mutex *sqlite3_db_mutex(sqlite3*);

/*
** CAPI3REF: Low-Level Control Of Database Files
**
** ^The [sqlite3_file_control()] interface makes a direct call to the
** xFileControl method for the [sqlite3_io_methods] object associated
** with a particular database identified by the second argument. ^The
** name of the database is "main" for the main database or "temp" for the
** TEMP database, or the name that appears after the AS keyword for
** databases that are added using the [ATTACH] SQL command.
** ^A NULL pointer can be used in place of "main" to refer to the
** main database file.
** ^The third and fourth parameters to this routine
** are passed directly through to the second and third parameters of
** the xFileControl method.  ^The return value of the xFileControl
** method becomes the return value of this routine.
**
** ^The SQLITE_FCNTL_FILE_POINTER value for the op parameter causes
** a pointer to the underlying [sqlite3_file] object to be written into
** the space pointed to by the 4th parameter.  ^The SQLITE_FCNTL_FILE_POINTER
** case is a short-circuit path which does not actually invoke the
** underlying sqlite3_io_methods.xFileControl method.
**
** ^If the second parameter (zDbName) does not match the name of any
** open database file, then SQLITE_ERROR is returned.  ^This error
** code is not remembered and will not be recalled by [sqlite3_errcode()]
** or [sqlite3_errmsg()].  The underlying xFileControl method might
** also return SQLITE_ERROR.  There is no way to distinguish between
** an incorrect zDbName and an SQLITE_ERROR return from the underlying
** xFileControl method.
**
** See also: [SQLITE_FCNTL_LOCKSTATE]
*/
SQLITE_API int sqlite3_file_control(sqlite3*, const char *zDbName, int op, void*);

/*
** CAPI3REF: Testing Interface
**
** ^The sqlite3_test_control() interface is used to read out internal
** state of SQLite and to inject faults into SQLite for testing
** purposes.  ^The first parameter is an operation code that determines
** the number, meaning, and operation of all subsequent parameters.
**
** This interface is not for use by applications.  It exists solely
** for verifying the correct operation of the SQLite library.  Depending
** on how the SQLite library is compiled, this interface might not exist.
**
** The details of the operation codes, their meanings, the parameters
** they take, and what they do are all subject to change without notice.
** Unlike most of the SQLite API, this function is not guaranteed to
** operate consistently from one release to the next.
*/
SQLITE_API int sqlite3_test_control(int op, ...);

/*
** CAPI3REF: Testing Interface Operation Codes
**
** These constants are the valid operation code parameters used
** as the first argument to [sqlite3_test_control()].
**
** These parameters and their meanings are subject to change
** without notice.  These values are for testing purposes only.
** Applications should not use any of these parameters or the
** [sqlite3_test_control()] interface.
*/
#define SQLITE_TESTCTRL_FIRST                    5
#define SQLITE_TESTCTRL_PRNG_SAVE                5
#define SQLITE_TESTCTRL_PRNG_RESTORE             6
#define SQLITE_TESTCTRL_PRNG_RESET               7
#define SQLITE_TESTCTRL_BITVEC_TEST              8
#define SQLITE_TESTCTRL_FAULT_INSTALL            9
#define SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS     10
#define SQLITE_TESTCTRL_PENDING_BYTE            11
#define SQLITE_TESTCTRL_ASSERT                  12
#define SQLITE_TESTCTRL_ALWAYS                  13
#define SQLITE_TESTCTRL_RESERVE                 14
#define SQLITE_TESTCTRL_OPTIMIZATIONS           15
#define SQLITE_TESTCTRL_ISKEYWORD               16
#define SQLITE_TESTCTRL_SCRATCHMALLOC           17
#define SQLITE_TESTCTRL_LOCALTIME_FAULT         18
#define SQLITE_TESTCTRL_EXPLAIN_STMT            19
#define SQLITE_TESTCTRL_NEVER_CORRUPT           20
#define SQLITE_TESTCTRL_LAST                    20

/*
** CAPI3REF: SQLite Runtime Status
**
** ^This interface is used to retrieve runtime status information
** about the performance of SQLite, and optionally to reset various
** highwater marks.  ^The first argument is an integer code for
** the specific parameter to measure.  ^(Recognized integer codes
** are of the form [status parameters | SQLITE_STATUS_...].)^
** ^The current value of the parameter is returned into *pCurrent.
** ^The highest recorded value is returned in *pHighwater.  ^If the
** resetFlag is true, then the highest record value is reset after
** *pHighwater is written.  ^(Some parameters do not record the highest
** value.  For those parameters
** nothing is written into *pHighwater and the resetFlag is ignored.)^
** ^(Other parameters record only the highwater mark and not the current
** value.  For these latter parameters nothing is written into *pCurrent.)^
**
** ^The sqlite3_status() routine returns SQLITE_OK on success and a
** non-zero [error code] on failure.
**
** This routine is threadsafe but is not atomic.  This routine can be
** called while other threads are running the same or different SQLite
** interfaces.  However the values returned in *pCurrent and
** *pHighwater reflect the status of SQLite at different points in time
** and it is possible that another thread might change the parameter
** in between the times when *pCurrent and *pHighwater are written.
**
** See also: [sqlite3_db_status()]
*/
SQLITE_API int sqlite3_status(int op, int *pCurrent, int *pHighwater, int resetFlag);


/*
** CAPI3REF: Status Parameters
** KEYWORDS: {status parameters}
**
** These integer constants designate various run-time status parameters
** that can be returned by [sqlite3_status()].
**
** <dl>
** [[SQLITE_STATUS_MEMORY_USED]] ^(<dt>SQLITE_STATUS_MEMORY_USED</dt>
** <dd>This parameter is the current amount of memory checked out
** using [sqlite3_malloc()], either directly or indirectly.  The
** figure includes calls made to [sqlite3_malloc()] by the application
** and internal memory usage by the SQLite library.  Scratch memory
** controlled by [SQLITE_CONFIG_SCRATCH] and auxiliary page-cache
** memory controlled by [SQLITE_CONFIG_PAGECACHE] is not included in
** this parameter.  The amount returned is the sum of the allocation
** sizes as reported by the xSize method in [sqlite3_mem_methods].</dd>)^
**
** [[SQLITE_STATUS_MALLOC_SIZE]] ^(<dt>SQLITE_STATUS_MALLOC_SIZE</dt>
** <dd>This parameter records the largest memory allocation request
** handed to [sqlite3_malloc()] or [sqlite3_realloc()] (or their
** internal equivalents).  Only the value returned in the
** *pHighwater parameter to [sqlite3_status()] is of interest.  
** The value written into the *pCurrent parameter is undefined.</dd>)^
**
** [[SQLITE_STATUS_MALLOC_COUNT]] ^(<dt>SQLITE_STATUS_MALLOC_COUNT</dt>
** <dd>This parameter records the number of separate memory allocations
** currently checked out.</dd>)^
**
** [[SQLITE_STATUS_PAGECACHE_USED]] ^(<dt>SQLITE_STATUS_PAGECACHE_USED</dt>
** <dd>This parameter returns the number of pages used out of the
** [pagecache memory allocator] that was configured using 
** [SQLITE_CONFIG_PAGECACHE].  The
** value returned is in pages, not in bytes.</dd>)^
**
** [[SQLITE_STATUS_PAGECACHE_OVERFLOW]] 
** ^(<dt>SQLITE_STATUS_PAGECACHE_OVERFLOW</dt>
** <dd>This parameter returns the number of bytes of page cache
** allocation which could not be satisfied by the [SQLITE_CONFIG_PAGECACHE]
** buffer and where forced to overflow to [sqlite3_malloc()].  The
** returned value includes allocations that overflowed because they
** where too large (they were larger than the "sz" parameter to
** [SQLITE_CONFIG_PAGECACHE]) and allocations that overflowed because
** no space was left in the page cache.</dd>)^
**
** [[SQLITE_STATUS_PAGECACHE_SIZE]] ^(<dt>SQLITE_STATUS_PAGECACHE_SIZE</dt>
** <dd>This parameter records the largest memory allocation request
** handed to [pagecache memory allocator].  Only the value returned in the
** *pHighwater parameter to [sqlite3_status()] is of interest.  
** The value written into the *pCurrent parameter is undefined.</dd>)^
**
** [[SQLITE_STATUS_SCRATCH_USED]] ^(<dt>SQLITE_STATUS_SCRATCH_USED</dt>
** <dd>This parameter returns the number of allocations used out of the
** [scratch memory allocator] configured using
** [SQLITE_CONFIG_SCRATCH].  The value returned is in allocations, not
** in bytes.  Since a single thread may only have one scratch allocation
** outstanding at time, this parameter also reports the number of threads
** using scratch memory at the same time.</dd>)^
**
** [[SQLITE_STATUS_SCRATCH_OVERFLOW]] ^(<dt>SQLITE_STATUS_SCRATCH_OVERFLOW</dt>
** <dd>This parameter returns the number of bytes of scratch memory
** allocation which could not be satisfied by the [SQLITE_CONFIG_SCRATCH]
** buffer and where forced to overflow to [sqlite3_malloc()].  The values
** returned include overflows because the requested allocation was too
** larger (that is, because the requested allocation was larger than the
** "sz" parameter to [SQLITE_CONFIG_SCRATCH]) and because no scratch buffer
** slots were available.
** </dd>)^
**
** [[SQLITE_STATUS_SCRATCH_SIZE]] ^(<dt>SQLITE_STATUS_SCRATCH_SIZE</dt>
** <dd>This parameter records the largest memory allocation request
** handed to [scratch memory allocator].  Only the value returned in the
** *pHighwater parameter to [sqlite3_status()] is of interest.  
** The value written into the *pCurrent parameter is undefined.</dd>)^
**
** [[SQLITE_STATUS_PARSER_STACK]] ^(<dt>SQLITE_STATUS_PARSER_STACK</dt>
** <dd>This parameter records the deepest parser stack.  It is only
** meaningful if SQLite is compiled with [YYTRACKMAXSTACKDEPTH].</dd>)^
** </dl>
**
** New status parameters may be added from time to time.
*/
#define SQLITE_STATUS_MEMORY_USED          0
#define SQLITE_STATUS_PAGECACHE_USED       1
#define SQLITE_STATUS_PAGECACHE_OVERFLOW   2
#define SQLITE_STATUS_SCRATCH_USED         3
#define SQLITE_STATUS_SCRATCH_OVERFLOW     4
#define SQLITE_STATUS_MALLOC_SIZE          5
#define SQLITE_STATUS_PARSER_STACK         6
#define SQLITE_STATUS_PAGECACHE_SIZE       7
#define SQLITE_STATUS_SCRATCH_SIZE         8
#define SQLITE_STATUS_MALLOC_COUNT         9

/*
** CAPI3REF: Database Connection Status
**
** ^This interface is used to retrieve runtime status information 
** about a single [database connection].  ^The first argument is the
** database connection object to be interrogated.  ^The second argument
** is an integer constant, taken from the set of
** [SQLITE_DBSTATUS options], that
** determines the parameter to interrogate.  The set of 
** [SQLITE_DBSTATUS options] is likely
** to grow in future releases of SQLite.
**
** ^The current value of the requested parameter is written into *pCur
** and the highest instantaneous value is written into *pHiwtr.  ^If
** the resetFlg is true, then the highest instantaneous value is
** reset back down to the current value.
**
** ^The sqlite3_db_status() routine returns SQLITE_OK on success and a
** non-zero [error code] on failure.
**
** See also: [sqlite3_status()] and [sqlite3_stmt_status()].
*/
SQLITE_API int sqlite3_db_status(sqlite3*, int op, int *pCur, int *pHiwtr, int resetFlg);

/*
** CAPI3REF: Status Parameters for database connections
** KEYWORDS: {SQLITE_DBSTATUS options}
**
** These constants are the available integer "verbs" that can be passed as
** the second argument to the [sqlite3_db_status()] interface.
**
** New verbs may be added in future releases of SQLite. Existing verbs
** might be discontinued. Applications should check the return code from
** [sqlite3_db_status()] to make sure that the call worked.
** The [sqlite3_db_status()] interface will return a non-zero error code
** if a discontinued or unsupported verb is invoked.
**
** <dl>
** [[SQLITE_DBSTATUS_LOOKASIDE_USED]] ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_USED</dt>
** <dd>This parameter returns the number of lookaside memory slots currently
** checked out.</dd>)^
**
** [[SQLITE_DBSTATUS_LOOKASIDE_HIT]] ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_HIT</dt>
** <dd>This parameter returns the number malloc attempts that were 
** satisfied using lookaside memory. Only the high-water value is meaningful;
** the current value is always zero.)^
**
** [[SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE]]
** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE</dt>
** <dd>This parameter returns the number malloc attempts that might have
** been satisfied using lookaside memory but failed due to the amount of
** memory requested being larger than the lookaside slot size.
** Only the high-water value is meaningful;
** the current value is always zero.)^
**
** [[SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL]]
** ^(<dt>SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL</dt>
** <dd>This parameter returns the number malloc attempts that might have
** been satisfied using lookaside memory but failed due to all lookaside
** memory already being in use.
** Only the high-water value is meaningful;
** the current value is always zero.)^
**
** [[SQLITE_DBSTATUS_CACHE_USED]] ^(<dt>SQLITE_DBSTATUS_CACHE_USED</dt>
** <dd>This parameter returns the approximate number of of bytes of heap
** memory used by all pager caches associated with the database connection.)^
** ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_USED is always 0.
**
** [[SQLITE_DBSTATUS_SCHEMA_USED]] ^(<dt>SQLITE_DBSTATUS_SCHEMA_USED</dt>
** <dd>This parameter returns the approximate number of of bytes of heap
** memory used to store the schema for all databases associated
** with the connection - main, temp, and any [ATTACH]-ed databases.)^ 
** ^The full amount of memory used by the schemas is reported, even if the
** schema memory is shared with other database connections due to
** [shared cache mode] being enabled.
** ^The highwater mark associated with SQLITE_DBSTATUS_SCHEMA_USED is always 0.
**
** [[SQLITE_DBSTATUS_STMT_USED]] ^(<dt>SQLITE_DBSTATUS_STMT_USED</dt>
** <dd>This parameter returns the approximate number of of bytes of heap
** and lookaside memory used by all prepared statements associated with
** the database connection.)^
** ^The highwater mark associated with SQLITE_DBSTATUS_STMT_USED is always 0.
** </dd>
**
** [[SQLITE_DBSTATUS_CACHE_HIT]] ^(<dt>SQLITE_DBSTATUS_CACHE_HIT</dt>
** <dd>This parameter returns the number of pager cache hits that have
** occurred.)^ ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_HIT 
** is always 0.
** </dd>
**
** [[SQLITE_DBSTATUS_CACHE_MISS]] ^(<dt>SQLITE_DBSTATUS_CACHE_MISS</dt>
** <dd>This parameter returns the number of pager cache misses that have
** occurred.)^ ^The highwater mark associated with SQLITE_DBSTATUS_CACHE_MISS 
** is always 0.
** </dd>
**
** [[SQLITE_DBSTATUS_CACHE_WRITE]] ^(<dt>SQLITE_DBSTATUS_CACHE_WRITE</dt>
** <dd>This parameter returns the number of dirty cache entries that have
** been written to disk. Specifically, the number of pages written to the
** wal file in wal mode databases, or the number of pages written to the
** database file in rollback mode databases. Any pages written as part of
** transaction rollback or database recovery operations are not included.
** If an IO or other error occurs while writing a page to disk, the effect
** on subsequent SQLITE_DBSTATUS_CACHE_WRITE requests is undefined.)^ ^The
** highwater mark associated with SQLITE_DBSTATUS_CACHE_WRITE is always 0.
** </dd>
**
** [[SQLITE_DBSTATUS_DEFERRED_FKS]] ^(<dt>SQLITE_DBSTATUS_DEFERRED_FKS</dt>
** <dd>This parameter returns zero for the current value if and only if
** all foreign key constraints (deferred or immediate) have been
** resolved.)^  ^The highwater mark is always 0.
** </dd>
** </dl>
*/
#define SQLITE_DBSTATUS_LOOKASIDE_USED       0
#define SQLITE_DBSTATUS_CACHE_USED           1
#define SQLITE_DBSTATUS_SCHEMA_USED          2
#define SQLITE_DBSTATUS_STMT_USED            3
#define SQLITE_DBSTATUS_LOOKASIDE_HIT        4
#define SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE  5
#define SQLITE_DBSTATUS_LOOKASIDE_MISS_FULL  6
#define SQLITE_DBSTATUS_CACHE_HIT            7
#define SQLITE_DBSTATUS_CACHE_MISS           8
#define SQLITE_DBSTATUS_CACHE_WRITE          9
#define SQLITE_DBSTATUS_DEFERRED_FKS        10
#define SQLITE_DBSTATUS_MAX                 10   /* Largest defined DBSTATUS */


/*
** CAPI3REF: Prepared Statement Status
**
** ^(Each prepared statement maintains various
** [SQLITE_STMTSTATUS counters] that measure the number
** of times it has performed specific operations.)^  These counters can
** be used to monitor the performance characteristics of the prepared
** statements.  For example, if the number of table steps greatly exceeds
** the number of table searches or result rows, that would tend to indicate
** that the prepared statement is using a full table scan rather than
** an index.  
**
** ^(This interface is used to retrieve and reset counter values from
** a [prepared statement].  The first argument is the prepared statement
** object to be interrogated.  The second argument
** is an integer code for a specific [SQLITE_STMTSTATUS counter]
** to be interrogated.)^
** ^The current value of the requested counter is returned.
** ^If the resetFlg is true, then the counter is reset to zero after this
** interface call returns.
**
** See also: [sqlite3_status()] and [sqlite3_db_status()].
*/
SQLITE_API int sqlite3_stmt_status(sqlite3_stmt*, int op,int resetFlg);

/*
** CAPI3REF: Status Parameters for prepared statements
** KEYWORDS: {SQLITE_STMTSTATUS counter} {SQLITE_STMTSTATUS counters}
**
** These preprocessor macros define integer codes that name counter
** values associated with the [sqlite3_stmt_status()] interface.
** The meanings of the various counters are as follows:
**
** <dl>
** [[SQLITE_STMTSTATUS_FULLSCAN_STEP]] <dt>SQLITE_STMTSTATUS_FULLSCAN_STEP</dt>
** <dd>^This is the number of times that SQLite has stepped forward in
** a table as part of a full table scan.  Large numbers for this counter
** may indicate opportunities for performance improvement through 
** careful use of indices.</dd>
**
** [[SQLITE_STMTSTATUS_SORT]] <dt>SQLITE_STMTSTATUS_SORT</dt>
** <dd>^This is the number of sort operations that have occurred.
** A non-zero value in this counter may indicate an opportunity to
** improvement performance through careful use of indices.</dd>
**
** [[SQLITE_STMTSTATUS_AUTOINDEX]] <dt>SQLITE_STMTSTATUS_AUTOINDEX</dt>
** <dd>^This is the number of rows inserted into transient indices that
** were created automatically in order to help joins run faster.
** A non-zero value in this counter may indicate an opportunity to
** improvement performance by adding permanent indices that do not
** need to be reinitialized each time the statement is run.</dd>
**
** [[SQLITE_STMTSTATUS_VM_STEP]] <dt>SQLITE_STMTSTATUS_VM_STEP</dt>
** <dd>^This is the number of virtual machine operations executed
** by the prepared statement if that number is less than or equal
** to 2147483647.  The number of virtual machine operations can be 
** used as a proxy for the total work done by the prepared statement.
** If the number of virtual machine operations exceeds 2147483647
** then the value returned by this statement status code is undefined.
** </dd>
** </dl>
*/
#define SQLITE_STMTSTATUS_FULLSCAN_STEP     1
#define SQLITE_STMTSTATUS_SORT              2
#define SQLITE_STMTSTATUS_AUTOINDEX         3
#define SQLITE_STMTSTATUS_VM_STEP           4

/*
** CAPI3REF: Custom Page Cache Object
**
** The sqlite3_pcache type is opaque.  It is implemented by
** the pluggable module.  The SQLite core has no knowledge of
** its size or internal structure and never deals with the
** sqlite3_pcache object except by holding and passing pointers
** to the object.
**
** See [sqlite3_pcache_methods2] for additional information.
*/
typedef struct sqlite3_pcache sqlite3_pcache;

/*
** CAPI3REF: Custom Page Cache Object
**
** The sqlite3_pcache_page object represents a single page in the
** page cache.  The page cache will allocate instances of this
** object.  Various methods of the page cache use pointers to instances
** of this object as parameters or as their return value.
**
** See [sqlite3_pcache_methods2] for additional information.
*/
typedef struct sqlite3_pcache_page sqlite3_pcache_page;
struct sqlite3_pcache_page {
  void *pBuf;        /* The content of the page */
  void *pExtra;      /* Extra information associated with the page */
};

/*
** CAPI3REF: Application Defined Page Cache.
** KEYWORDS: {page cache}
**
** ^(The [sqlite3_config]([SQLITE_CONFIG_PCACHE2], ...) interface can
** register an alternative page cache implementation by passing in an 
** instance of the sqlite3_pcache_methods2 structure.)^
** In many applications, most of the heap memory allocated by 
** SQLite is used for the page cache.
** By implementing a 
** custom page cache using this API, an application can better control
** the amount of memory consumed by SQLite, the way in which 
** that memory is allocated and released, and the policies used to 
** determine exactly which parts of a database file are cached and for 
** how long.
**
** The alternative page cache mechanism is an
** extreme measure that is only needed by the most demanding applications.
** The built-in page cache is recommended for most uses.
**
** ^(The contents of the sqlite3_pcache_methods2 structure are copied to an
** internal buffer by SQLite within the call to [sqlite3_config].  Hence
** the application may discard the parameter after the call to
** [sqlite3_config()] returns.)^
**
** [[the xInit() page cache method]]
** ^(The xInit() method is called once for each effective 
** call to [sqlite3_initialize()])^
** (usually only once during the lifetime of the process). ^(The xInit()
** method is passed a copy of the sqlite3_pcache_methods2.pArg value.)^
** The intent of the xInit() method is to set up global data structures 
** required by the custom page cache implementation. 
** ^(If the xInit() method is NULL, then the 
** built-in default page cache is used instead of the application defined
** page cache.)^
**
** [[the xShutdown() page cache method]]
** ^The xShutdown() method is called by [sqlite3_shutdown()].
** It can be used to clean up 
** any outstanding resources before process shutdown, if required.
** ^The xShutdown() method may be NULL.
**
** ^SQLite automatically serializes calls to the xInit method,
** so the xInit method need not be threadsafe.  ^The
** xShutdown method is only called from [sqlite3_shutdown()] so it does
** not need to be threadsafe either.  All other methods must be threadsafe
** in multithreaded applications.
**
** ^SQLite will never invoke xInit() more than once without an intervening
** call to xShutdown().
**
** [[the xCreate() page cache methods]]
** ^SQLite invokes the xCreate() method to construct a new cache instance.
** SQLite will typically create one cache instance for each open database file,
** though this is not guaranteed. ^The
** first parameter, szPage, is the size in bytes of the pages that must
** be allocated by the cache.  ^szPage will always a power of two.  ^The
** second parameter szExtra is a number of bytes of extra storage 
** associated with each page cache entry.  ^The szExtra parameter will
** a number less than 250.  SQLite will use the
** extra szExtra bytes on each page to store metadata about the underlying
** database page on disk.  The value passed into szExtra depends
** on the SQLite version, the target platform, and how SQLite was compiled.
** ^The third argument to xCreate(), bPurgeable, is true if the cache being
** created will be used to cache database pages of a file stored on disk, or
** false if it is used for an in-memory database. The cache implementation
** does not have to do anything special based with the value of bPurgeable;
** it is purely advisory.  ^On a cache where bPurgeable is false, SQLite will
** never invoke xUnpin() except to deliberately delete a page.
** ^In other words, calls to xUnpin() on a cache with bPurgeable set to
** false will always have the "discard" flag set to true.  
** ^Hence, a cache created with bPurgeable false will
** never contain any unpinned pages.
**
** [[the xCachesize() page cache method]]
** ^(The xCachesize() method may be called at any time by SQLite to set the
** suggested maximum cache-size (number of pages stored by) the cache
** instance passed as the first argument. This is the value configured using
** the SQLite "[PRAGMA cache_size]" command.)^  As with the bPurgeable
** parameter, the implementation is not required to do anything with this
** value; it is advisory only.
**
** [[the xPagecount() page cache methods]]
** The xPagecount() method must return the number of pages currently
** stored in the cache, both pinned and unpinned.
** 
** [[the xFetch() page cache methods]]
** The xFetch() method locates a page in the cache and returns a pointer to 
** an sqlite3_pcache_page object associated with that page, or a NULL pointer.
** The pBuf element of the returned sqlite3_pcache_page object will be a
** pointer to a buffer of szPage bytes used to store the content of a 
** single database page.  The pExtra element of sqlite3_pcache_page will be
** a pointer to the szExtra bytes of extra storage that SQLite has requested
** for each entry in the page cache.
**
** The page to be fetched is determined by the key. ^The minimum key value
** is 1.  After it has been retrieved using xFetch, the page is considered
** to be "pinned".
**
** If the requested page is already in the page cache, then the page cache
** implementation must return a pointer to the page buffer with its content
** intact.  If the requested page is not already in the cache, then the
** cache implementation should use the value of the createFlag
** parameter to help it determined what action to take:
**
** <table border=1 width=85% align=center>
** <tr><th> createFlag <th> Behavior when page is not already in cache
** <tr><td> 0 <td> Do not allocate a new page.  Return NULL.
** <tr><td> 1 <td> Allocate a new page if it easy and convenient to do so.
**                 Otherwise return NULL.
** <tr><td> 2 <td> Make every effort to allocate a new page.  Only return
**                 NULL if allocating a new page is effectively impossible.
** </table>
**
** ^(SQLite will normally invoke xFetch() with a createFlag of 0 or 1.  SQLite
** will only use a createFlag of 2 after a prior call with a createFlag of 1
** failed.)^  In between the to xFetch() calls, SQLite may
** attempt to unpin one or more cache pages by spilling the content of
** pinned pages to disk and synching the operating system disk cache.
**
** [[the xUnpin() page cache method]]
** ^xUnpin() is called by SQLite with a pointer to a currently pinned page
** as its second argument.  If the third parameter, discard, is non-zero,
** then the page must be evicted from the cache.
** ^If the discard parameter is
** zero, then the page may be discarded or retained at the discretion of
** page cache implementation. ^The page cache implementation
** may choose to evict unpinned pages at any time.
**
** The cache must not perform any reference counting. A single 
** call to xUnpin() unpins the page regardless of the number of prior calls 
** to xFetch().
**
** [[the xRekey() page cache methods]]
** The xRekey() method is used to change the key value associated with the
** page passed as the second argument. If the cache
** previously contains an entry associated with newKey, it must be
** discarded. ^Any prior cache entry associated with newKey is guaranteed not
** to be pinned.
**
** When SQLite calls the xTruncate() method, the cache must discard all
** existing cache entries with page numbers (keys) greater than or equal
** to the value of the iLimit parameter passed to xTruncate(). If any
** of these pages are pinned, they are implicitly unpinned, meaning that
** they can be safely discarded.
**
** [[the xDestroy() page cache method]]
** ^The xDestroy() method is used to delete a cache allocated by xCreate().
** All resources associated with the specified cache should be freed. ^After
** calling the xDestroy() method, SQLite considers the [sqlite3_pcache*]
** handle invalid, and will not use it with any other sqlite3_pcache_methods2
** functions.
**
** [[the xShrink() page cache method]]
** ^SQLite invokes the xShrink() method when it wants the page cache to
** free up as much of heap memory as possible.  The page cache implementation
** is not obligated to free any memory, but well-behaved implementations should
** do their best.
*/
typedef struct sqlite3_pcache_methods2 sqlite3_pcache_methods2;
struct sqlite3_pcache_methods2 {
  int iVersion;
  void *pArg;
  int (*xInit)(void*);
  void (*xShutdown)(void*);
  sqlite3_pcache *(*xCreate)(int szPage, int szExtra, int bPurgeable);
  void (*xCachesize)(sqlite3_pcache*, int nCachesize);
  int (*xPagecount)(sqlite3_pcache*);
  sqlite3_pcache_page *(*xFetch)(sqlite3_pcache*, unsigned key, int createFlag);
  void (*xUnpin)(sqlite3_pcache*, sqlite3_pcache_page*, int discard);
  void (*xRekey)(sqlite3_pcache*, sqlite3_pcache_page*, 
      unsigned oldKey, unsigned newKey);
  void (*xTruncate)(sqlite3_pcache*, unsigned iLimit);
  void (*xDestroy)(sqlite3_pcache*);
  void (*xShrink)(sqlite3_pcache*);
};

/*
** This is the obsolete pcache_methods object that has now been replaced
** by sqlite3_pcache_methods2.  This object is not used by SQLite.  It is
** retained in the header file for backwards compatibility only.
*/
typedef struct sqlite3_pcache_methods sqlite3_pcache_methods;
struct sqlite3_pcache_methods {
  void *pArg;
  int (*xInit)(void*);
  void (*xShutdown)(void*);
  sqlite3_pcache *(*xCreate)(int szPage, int bPurgeable);
  void (*xCachesize)(sqlite3_pcache*, int nCachesize);
  int (*xPagecount)(sqlite3_pcache*);
  void *(*xFetch)(sqlite3_pcache*, unsigned key, int createFlag);
  void (*xUnpin)(sqlite3_pcache*, void*, int discard);
  void (*xRekey)(sqlite3_pcache*, void*, unsigned oldKey, unsigned newKey);
  void (*xTruncate)(sqlite3_pcache*, unsigned iLimit);
  void (*xDestroy)(sqlite3_pcache*);
};


/*
** CAPI3REF: Online Backup Object
**
** The sqlite3_backup object records state information about an ongoing
** online backup operation.  ^The sqlite3_backup object is created by
** a call to [sqlite3_backup_init()] and is destroyed by a call to
** [sqlite3_backup_finish()].
**
** See Also: [Using the SQLite Online Backup API]
*/
typedef struct sqlite3_backup sqlite3_backup;

/*
** CAPI3REF: Online Backup API.
**
** The backup API copies the content of one database into another.
** It is useful either for creating backups of databases or
** for copying in-memory databases to or from persistent files. 
**
** See Also: [Using the SQLite Online Backup API]
**
** ^SQLite holds a write transaction open on the destination database file
** for the duration of the backup operation.
** ^The source database is read-locked only while it is being read;
** it is not locked continuously for the entire backup operation.
** ^Thus, the backup may be performed on a live source database without
** preventing other database connections from
** reading or writing to the source database while the backup is underway.
** 
** ^(To perform a backup operation: 
**   <ol>
**     <li><b>sqlite3_backup_init()</b> is called once to initialize the
**         backup, 
**     <li><b>sqlite3_backup_step()</b> is called one or more times to transfer 
**         the data between the two databases, and finally
**     <li><b>sqlite3_backup_finish()</b> is called to release all resources 
**         associated with the backup operation. 
**   </ol>)^
** There should be exactly one call to sqlite3_backup_finish() for each
** successful call to sqlite3_backup_init().
**
** [[sqlite3_backup_init()]] <b>sqlite3_backup_init()</b>
**
** ^The D and N arguments to sqlite3_backup_init(D,N,S,M) are the 
** [database connection] associated with the destination database 
** and the database name, respectively.
** ^The database name is "main" for the main database, "temp" for the
** temporary database, or the name specified after the AS keyword in
** an [ATTACH] statement for an attached database.
** ^The S and M arguments passed to 
** sqlite3_backup_init(D,N,S,M) identify the [database connection]
** and database name of the source database, respectively.
** ^The source and destination [database connections] (parameters S and D)
** must be different or else sqlite3_backup_init(D,N,S,M) will fail with
** an error.
**
** ^If an error occurs within sqlite3_backup_init(D,N,S,M), then NULL is
** returned and an error code and error message are stored in the
** destination [database connection] D.
** ^The error code and message for the failed call to sqlite3_backup_init()
** can be retrieved using the [sqlite3_errcode()], [sqlite3_errmsg()], and/or
** [sqlite3_errmsg16()] functions.
** ^A successful call to sqlite3_backup_init() returns a pointer to an
** [sqlite3_backup] object.
** ^The [sqlite3_backup] object may be used with the sqlite3_backup_step() and
** sqlite3_backup_finish() functions to perform the specified backup 
** operation.
**
** [[sqlite3_backup_step()]] <b>sqlite3_backup_step()</b>
**
** ^Function sqlite3_backup_step(B,N) will copy up to N pages between 
** the source and destination databases specified by [sqlite3_backup] object B.
** ^If N is negative, all remaining source pages are copied. 
** ^If sqlite3_backup_step(B,N) successfully copies N pages and there
** are still more pages to be copied, then the function returns [SQLITE_OK].
** ^If sqlite3_backup_step(B,N) successfully finishes copying all pages
** from source to destination, then it returns [SQLITE_DONE].
** ^If an error occurs while running sqlite3_backup_step(B,N),
** then an [error code] is returned. ^As well as [SQLITE_OK] and
** [SQLITE_DONE], a call to sqlite3_backup_step() may return [SQLITE_READONLY],
** [SQLITE_NOMEM], [SQLITE_BUSY], [SQLITE_LOCKED], or an
** [SQLITE_IOERR_ACCESS | SQLITE_IOERR_XXX] extended error code.
**
** ^(The sqlite3_backup_step() might return [SQLITE_READONLY] if
** <ol>
** <li> the destination database was opened read-only, or
** <li> the destination database is using write-ahead-log journaling
** and the destination and source page sizes differ, or
** <li> the destination database is an in-memory database and the
** destination and source page sizes differ.
** </ol>)^
**
** ^If sqlite3_backup_step() cannot obtain a required file-system lock, then
** the [sqlite3_busy_handler | busy-handler function]
** is invoked (if one is specified). ^If the 
** busy-handler returns non-zero before the lock is available, then 
** [SQLITE_BUSY] is returned to the caller. ^In this case the call to
** sqlite3_backup_step() can be retried later. ^If the source
** [database connection]
** is being used to write to the source database when sqlite3_backup_step()
** is called, then [SQLITE_LOCKED] is returned immediately. ^Again, in this
** case the call to sqlite3_backup_step() can be retried later on. ^(If
** [SQLITE_IOERR_ACCESS | SQLITE_IOERR_XXX], [SQLITE_NOMEM], or
** [SQLITE_READONLY] is returned, then 
** there is no point in retrying the call to sqlite3_backup_step(). These 
** errors are considered fatal.)^  The application must accept 
** that the backup operation has failed and pass the backup operation handle 
** to the sqlite3_backup_finish() to release associated resources.
**
** ^The first call to sqlite3_backup_step() obtains an exclusive lock
** on the destination file. ^The exclusive lock is not released until either 
** sqlite3_backup_finish() is called or the backup operation is complete 
** and sqlite3_backup_step() returns [SQLITE_DONE].  ^Every call to
** sqlite3_backup_step() obtains a [shared lock] on the source database that
** lasts for the duration of the sqlite3_backup_step() call.
** ^Because the source database is not locked between calls to
** sqlite3_backup_step(), the source database may be modified mid-way
** through the backup process.  ^If the source database is modified by an
** external process or via a database connection other than the one being
** used by the backup operation, then the backup will be automatically
** restarted by the next call to sqlite3_backup_step(). ^If the source 
** database is modified by the using the same database connection as is used
** by the backup operation, then the backup database is automatically
** updated at the same time.
**
** [[sqlite3_backup_finish()]] <b>sqlite3_backup_finish()</b>
**
** When sqlite3_backup_step() has returned [SQLITE_DONE], or when the 
** application wishes to abandon the backup operation, the application
** should destroy the [sqlite3_backup] by passing it to sqlite3_backup_finish().
** ^The sqlite3_backup_finish() interfaces releases all
** resources associated with the [sqlite3_backup] object. 
** ^If sqlite3_backup_step() has not yet returned [SQLITE_DONE], then any
** active write-transaction on the destination database is rolled back.
** The [sqlite3_backup] object is invalid
** and may not be used following a call to sqlite3_backup_finish().
**
** ^The value returned by sqlite3_backup_finish is [SQLITE_OK] if no
** sqlite3_backup_step() errors occurred, regardless or whether or not
** sqlite3_backup_step() completed.
** ^If an out-of-memory condition or IO error occurred during any prior
** sqlite3_backup_step() call on the same [sqlite3_backup] object, then
** sqlite3_backup_finish() returns the corresponding [error code].
**
** ^A return of [SQLITE_BUSY] or [SQLITE_LOCKED] from sqlite3_backup_step()
** is not a permanent error and does not affect the return value of
** sqlite3_backup_finish().
**
** [[sqlite3_backup__remaining()]] [[sqlite3_backup_pagecount()]]
** <b>sqlite3_backup_remaining() and sqlite3_backup_pagecount()</b>
**
** ^Each call to sqlite3_backup_step() sets two values inside
** the [sqlite3_backup] object: the number of pages still to be backed
** up and the total number of pages in the source database file.
** The sqlite3_backup_remaining() and sqlite3_backup_pagecount() interfaces
** retrieve these two values, respectively.
**
** ^The values returned by these functions are only updated by
** sqlite3_backup_step(). ^If the source database is modified during a backup
** operation, then the values are not updated to account for any extra
** pages that need to be updated or the size of the source database file
** changing.
**
** <b>Concurrent Usage of Database Handles</b>
**
** ^The source [database connection] may be used by the application for other
** purposes while a backup operation is underway or being initialized.
** ^If SQLite is compiled and configured to support threadsafe database
** connections, then the source database connection may be used concurrently
** from within other threads.
**
** However, the application must guarantee that the destination 
** [database connection] is not passed to any other API (by any thread) after 
** sqlite3_backup_init() is called and before the corresponding call to
** sqlite3_backup_finish().  SQLite does not currently check to see
** if the application incorrectly accesses the destination [database connection]
** and so no error code is reported, but the operations may malfunction
** nevertheless.  Use of the destination database connection while a
** backup is in progress might also also cause a mutex deadlock.
**
** If running in [shared cache mode], the application must
** guarantee that the shared cache used by the destination database
** is not accessed while the backup is running. In practice this means
** that the application must guarantee that the disk file being 
** backed up to is not accessed by any connection within the process,
** not just the specific connection that was passed to sqlite3_backup_init().
**
** The [sqlite3_backup] object itself is partially threadsafe. Multiple 
** threads may safely make multiple concurrent calls to sqlite3_backup_step().
** However, the sqlite3_backup_remaining() and sqlite3_backup_pagecount()
** APIs are not strictly speaking threadsafe. If they are invoked at the
** same time as another thread is invoking sqlite3_backup_step() it is
** possible that they return invalid values.
*/
SQLITE_API sqlite3_backup *sqlite3_backup_init(
  sqlite3 *pDest,                        /* Destination database handle */
  const char *zDestName,                 /* Destination database name */
  sqlite3 *pSource,                      /* Source database handle */
  const char *zSourceName                /* Source database name */
);
SQLITE_API int sqlite3_backup_step(sqlite3_backup *p, int nPage);
SQLITE_API int sqlite3_backup_finish(sqlite3_backup *p);
SQLITE_API int sqlite3_backup_remaining(sqlite3_backup *p);
SQLITE_API int sqlite3_backup_pagecount(sqlite3_backup *p);

/*
** CAPI3REF: Unlock Notification
**
** ^When running in shared-cache mode, a database operation may fail with
** an [SQLITE_LOCKED] error if the required locks on the shared-cache or
** individual tables within the shared-cache cannot be obtained. See
** [SQLite Shared-Cache Mode] for a description of shared-cache locking. 
** ^This API may be used to register a callback that SQLite will invoke 
** when the connection currently holding the required lock relinquishes it.
** ^This API is only available if the library was compiled with the
** [SQLITE_ENABLE_UNLOCK_NOTIFY] C-preprocessor symbol defined.
**
** See Also: [Using the SQLite Unlock Notification Feature].
**
** ^Shared-cache locks are released when a database connection concludes
** its current transaction, either by committing it or rolling it back. 
**
** ^When a connection (known as the blocked connection) fails to obtain a
** shared-cache lock and SQLITE_LOCKED is returned to the caller, the
** identity of the database connection (the blocking connection) that
** has locked the required resource is stored internally. ^After an 
** application receives an SQLITE_LOCKED error, it may call the
** sqlite3_unlock_notify() method with the blocked connection handle as 
** the first argument to register for a callback that will be invoked
** when the blocking connections current transaction is concluded. ^The
** callback is invoked from within the [sqlite3_step] or [sqlite3_close]
** call that concludes the blocking connections transaction.
**
** ^(If sqlite3_unlock_notify() is called in a multi-threaded application,
** there is a chance that the blocking connection will have already
** concluded its transaction by the time sqlite3_unlock_notify() is invoked.
** If this happens, then the specified callback is invoked immediately,
** from within the call to sqlite3_unlock_notify().)^
**
** ^If the blocked connection is attempting to obtain a write-lock on a
** shared-cache table, and more than one other connection currently holds
** a read-lock on the same table, then SQLite arbitrarily selects one of 
** the other connections to use as the blocking connection.
**
** ^(There may be at most one unlock-notify callback registered by a 
** blocked connection. If sqlite3_unlock_notify() is called when the
** blocked connection already has a registered unlock-notify callback,
** then the new callback replaces the old.)^ ^If sqlite3_unlock_notify() is
** called with a NULL pointer as its second argument, then any existing
** unlock-notify callback is canceled. ^The blocked connections 
** unlock-notify callback may also be canceled by closing the blocked
** connection using [sqlite3_close()].
**
** The unlock-notify callback is not reentrant. If an application invokes
** any sqlite3_xxx API functions from within an unlock-notify callback, a
** crash or deadlock may be the result.
**
** ^Unless deadlock is detected (see below), sqlite3_unlock_notify() always
** returns SQLITE_OK.
**
** <b>Callback Invocation Details</b>
**
** When an unlock-notify callback is registered, the application provides a 
** single void* pointer that is passed to the callback when it is invoked.
** However, the signature of the callback function allows SQLite to pass
** it an array of void* context pointers. The first argument passed to
** an unlock-notify callback is a pointer to an array of void* pointers,
** and the second is the number of entries in the array.
**
** When a blocking connections transaction is concluded, there may be
** more than one blocked connection that has registered for an unlock-notify
** callback. ^If two or more such blocked connections have specified the
** same callback function, then instead of invoking the callback function
** multiple times, it is invoked once with the set of void* context pointers
** specified by the blocked connections bundled together into an array.
** This gives the application an opportunity to prioritize any actions 
** related to the set of unblocked database connections.
**
** <b>Deadlock Detection</b>
**
** Assuming that after registering for an unlock-notify callback a 
** database waits for the callback to be issued before taking any further
** action (a reasonable assumption), then using this API may cause the
** application to deadlock. For example, if connection X is waiting for
** connection Y's transaction to be concluded, and similarly connection
** Y is waiting on connection X's transaction, then neither connection
** will proceed and the system may remain deadlocked indefinitely.
**
** To avoid this scenario, the sqlite3_unlock_notify() performs deadlock
** detection. ^If a given call to sqlite3_unlock_notify() would put the
** system in a deadlocked state, then SQLITE_LOCKED is returned and no
** unlock-notify callback is registered. The system is said to be in
** a deadlocked state if connection A has registered for an unlock-notify
** callback on the conclusion of connection B's transaction, and connection
** B has itself registered for an unlock-notify callback when connection
** A's transaction is concluded. ^Indirect deadlock is also detected, so
** the system is also considered to be deadlocked if connection B has
** registered for an unlock-notify callback on the conclusion of connection
** C's transaction, where connection C is waiting on connection A. ^Any
** number of levels of indirection are allowed.
**
** <b>The "DROP TABLE" Exception</b>
**
** When a call to [sqlite3_step()] returns SQLITE_LOCKED, it is almost 
** always appropriate to call sqlite3_unlock_notify(). There is however,
** one exception. When executing a "DROP TABLE" or "DROP INDEX" statement,
** SQLite checks if there are any currently executing SELECT statements
** that belong to the same connection. If there are, SQLITE_LOCKED is
** returned. In this case there is no "blocking connection", so invoking
** sqlite3_unlock_notify() results in the unlock-notify callback being
** invoked immediately. If the application then re-attempts the "DROP TABLE"
** or "DROP INDEX" query, an infinite loop might be the result.
**
** One way around this problem is to check the extended error code returned
** by an sqlite3_step() call. ^(If there is a blocking connection, then the
** extended error code is set to SQLITE_LOCKED_SHAREDCACHE. Otherwise, in
** the special "DROP TABLE/INDEX" case, the extended error code is just 
** SQLITE_LOCKED.)^
*/
SQLITE_API int sqlite3_unlock_notify(
  sqlite3 *pBlocked,                          /* Waiting connection */
  void (*xNotify)(void **apArg, int nArg),    /* Callback function to invoke */
  void *pNotifyArg                            /* Argument to pass to xNotify */
);


/*
** CAPI3REF: String Comparison
**
** ^The [sqlite3_stricmp()] and [sqlite3_strnicmp()] APIs allow applications
** and extensions to compare the contents of two buffers containing UTF-8
** strings in a case-independent fashion, using the same definition of "case
** independence" that SQLite uses internally when comparing identifiers.
*/
SQLITE_API int sqlite3_stricmp(const char *, const char *);
SQLITE_API int sqlite3_strnicmp(const char *, const char *, int);

/*
** CAPI3REF: String Globbing
*
** ^The [sqlite3_strglob(P,X)] interface returns zero if string X matches
** the glob pattern P, and it returns non-zero if string X does not match
** the glob pattern P.  ^The definition of glob pattern matching used in
** [sqlite3_strglob(P,X)] is the same as for the "X GLOB P" operator in the
** SQL dialect used by SQLite.  ^The sqlite3_strglob(P,X) function is case
** sensitive.
**
** Note that this routine returns zero on a match and non-zero if the strings
** do not match, the same as [sqlite3_stricmp()] and [sqlite3_strnicmp()].
*/
SQLITE_API int sqlite3_strglob(const char *zGlob, const char *zStr);

/*
** CAPI3REF: Error Logging Interface
**
** ^The [sqlite3_log()] interface writes a message into the [error log]
** established by the [SQLITE_CONFIG_LOG] option to [sqlite3_config()].
** ^If logging is enabled, the zFormat string and subsequent arguments are
** used with [sqlite3_snprintf()] to generate the final output string.
**
** The sqlite3_log() interface is intended for use by extensions such as
** virtual tables, collating functions, and SQL functions.  While there is
** nothing to prevent an application from calling sqlite3_log(), doing so
** is considered bad form.
**
** The zFormat string must not be NULL.
**
** To avoid deadlocks and other threading problems, the sqlite3_log() routine
** will not use dynamically allocated memory.  The log message is stored in
** a fixed-length buffer on the stack.  If the log message is longer than
** a few hundred characters, it will be truncated to the length of the
** buffer.
*/
SQLITE_API void sqlite3_log(int iErrCode, const char *zFormat, ...);

/*
** CAPI3REF: Write-Ahead Log Commit Hook
**
** ^The [sqlite3_wal_hook()] function is used to register a callback that
** will be invoked each time a database connection commits data to a
** [write-ahead log] (i.e. whenever a transaction is committed in
** [journal_mode | journal_mode=WAL mode]). 
**
** ^The callback is invoked by SQLite after the commit has taken place and 
** the associated write-lock on the database released, so the implementation 
** may read, write or [checkpoint] the database as required.
**
** ^The first parameter passed to the callback function when it is invoked
** is a copy of the third parameter passed to sqlite3_wal_hook() when
** registering the callback. ^The second is a copy of the database handle.
** ^The third parameter is the name of the database that was written to -
** either "main" or the name of an [ATTACH]-ed database. ^The fourth parameter
** is the number of pages currently in the write-ahead log file,
** including those that were just committed.
**
** The callback function should normally return [SQLITE_OK].  ^If an error
** code is returned, that error will propagate back up through the
** SQLite code base to cause the statement that provoked the callback
** to report an error, though the commit will have still occurred. If the
** callback returns [SQLITE_ROW] or [SQLITE_DONE], or if it returns a value
** that does not correspond to any valid SQLite error code, the results
** are undefined.
**
** A single database handle may have at most a single write-ahead log callback 
** registered at one time. ^Calling [sqlite3_wal_hook()] replaces any
** previously registered write-ahead log callback. ^Note that the
** [sqlite3_wal_autocheckpoint()] interface and the
** [wal_autocheckpoint pragma] both invoke [sqlite3_wal_hook()] and will
** those overwrite any prior [sqlite3_wal_hook()] settings.
*/
SQLITE_API void *sqlite3_wal_hook(
  sqlite3*, 
  int(*)(void *,sqlite3*,const char*,int),
  void*
);

/*
** CAPI3REF: Configure an auto-checkpoint
**
** ^The [sqlite3_wal_autocheckpoint(D,N)] is a wrapper around
** [sqlite3_wal_hook()] that causes any database on [database connection] D
** to automatically [checkpoint]
** after committing a transaction if there are N or
** more frames in the [write-ahead log] file.  ^Passing zero or 
** a negative value as the nFrame parameter disables automatic
** checkpoints entirely.
**
** ^The callback registered by this function replaces any existing callback
** registered using [sqlite3_wal_hook()].  ^Likewise, registering a callback
** using [sqlite3_wal_hook()] disables the automatic checkpoint mechanism
** configured by this function.
**
** ^The [wal_autocheckpoint pragma] can be used to invoke this interface
** from SQL.
**
** ^Every new [database connection] defaults to having the auto-checkpoint
** enabled with a threshold of 1000 or [SQLITE_DEFAULT_WAL_AUTOCHECKPOINT]
** pages.  The use of this interface
** is only necessary if the default setting is found to be suboptimal
** for a particular application.
*/
SQLITE_API int sqlite3_wal_autocheckpoint(sqlite3 *db, int N);

/*
** CAPI3REF: Checkpoint a database
**
** ^The [sqlite3_wal_checkpoint(D,X)] interface causes database named X
** on [database connection] D to be [checkpointed].  ^If X is NULL or an
** empty string, then a checkpoint is run on all databases of
** connection D.  ^If the database connection D is not in
** [WAL | write-ahead log mode] then this interface is a harmless no-op.
**
** ^The [wal_checkpoint pragma] can be used to invoke this interface
** from SQL.  ^The [sqlite3_wal_autocheckpoint()] interface and the
** [wal_autocheckpoint pragma] can be used to cause this interface to be
** run whenever the WAL reaches a certain size threshold.
**
** See also: [sqlite3_wal_checkpoint_v2()]
*/
SQLITE_API int sqlite3_wal_checkpoint(sqlite3 *db, const char *zDb);

/*
** CAPI3REF: Checkpoint a database
**
** Run a checkpoint operation on WAL database zDb attached to database 
** handle db. The specific operation is determined by the value of the 
** eMode parameter:
**
** <dl>
** <dt>SQLITE_CHECKPOINT_PASSIVE<dd>
**   Checkpoint as many frames as possible without waiting for any database 
**   readers or writers to finish. Sync the db file if all frames in the log
**   are checkpointed. This mode is the same as calling 
**   sqlite3_wal_checkpoint(). The busy-handler callback is never invoked.
**
** <dt>SQLITE_CHECKPOINT_FULL<dd>
**   This mode blocks (calls the busy-handler callback) until there is no
**   database writer and all readers are reading from the most recent database
**   snapshot. It then checkpoints all frames in the log file and syncs the
**   database file. This call blocks database writers while it is running,
**   but not database readers.
**
** <dt>SQLITE_CHECKPOINT_RESTART<dd>
**   This mode works the same way as SQLITE_CHECKPOINT_FULL, except after 
**   checkpointing the log file it blocks (calls the busy-handler callback)
**   until all readers are reading from the database file only. This ensures 
**   that the next client to write to the database file restarts the log file 
**   from the beginning. This call blocks database writers while it is running,
**   but not database readers.
** </dl>
**
** If pnLog is not NULL, then *pnLog is set to the total number of frames in
** the log file before returning. If pnCkpt is not NULL, then *pnCkpt is set to
** the total number of checkpointed frames (including any that were already
** checkpointed when this function is called). *pnLog and *pnCkpt may be
** populated even if sqlite3_wal_checkpoint_v2() returns other than SQLITE_OK.
** If no values are available because of an error, they are both set to -1
** before returning to communicate this to the caller.
**
** All calls obtain an exclusive "checkpoint" lock on the database file. If
** any other process is running a checkpoint operation at the same time, the 
** lock cannot be obtained and SQLITE_BUSY is returned. Even if there is a 
** busy-handler configured, it will not be invoked in this case.
**
** The SQLITE_CHECKPOINT_FULL and RESTART modes also obtain the exclusive 
** "writer" lock on the database file. If the writer lock cannot be obtained
** immediately, and a busy-handler is configured, it is invoked and the writer
** lock retried until either the busy-handler returns 0 or the lock is
** successfully obtained. The busy-handler is also invoked while waiting for
** database readers as described above. If the busy-handler returns 0 before
** the writer lock is obtained or while waiting for database readers, the
** checkpoint operation proceeds from that point in the same way as 
** SQLITE_CHECKPOINT_PASSIVE - checkpointing as many frames as possible 
** without blocking any further. SQLITE_BUSY is returned in this case.
**
** If parameter zDb is NULL or points to a zero length string, then the
** specified operation is attempted on all WAL databases. In this case the
** values written to output parameters *pnLog and *pnCkpt are undefined. If 
** an SQLITE_BUSY error is encountered when processing one or more of the 
** attached WAL databases, the operation is still attempted on any remaining 
** attached databases and SQLITE_BUSY is returned to the caller. If any other 
** error occurs while processing an attached database, processing is abandoned 
** and the error code returned to the caller immediately. If no error 
** (SQLITE_BUSY or otherwise) is encountered while processing the attached 
** databases, SQLITE_OK is returned.
**
** If database zDb is the name of an attached database that is not in WAL
** mode, SQLITE_OK is returned and both *pnLog and *pnCkpt set to -1. If
** zDb is not NULL (or a zero length string) and is not the name of any
** attached database, SQLITE_ERROR is returned to the caller.
*/
SQLITE_API int sqlite3_wal_checkpoint_v2(
  sqlite3 *db,                    /* Database handle */
  const char *zDb,                /* Name of attached database (or NULL) */
  int eMode,                      /* SQLITE_CHECKPOINT_* value */
  int *pnLog,                     /* OUT: Size of WAL log in frames */
  int *pnCkpt                     /* OUT: Total number of frames checkpointed */
);

/*
** CAPI3REF: Checkpoint operation parameters
**
** These constants can be used as the 3rd parameter to
** [sqlite3_wal_checkpoint_v2()].  See the [sqlite3_wal_checkpoint_v2()]
** documentation for additional information about the meaning and use of
** each of these values.
*/
#define SQLITE_CHECKPOINT_PASSIVE 0
#define SQLITE_CHECKPOINT_FULL    1
#define SQLITE_CHECKPOINT_RESTART 2

/*
** CAPI3REF: Virtual Table Interface Configuration
**
** This function may be called by either the [xConnect] or [xCreate] method
** of a [virtual table] implementation to configure
** various facets of the virtual table interface.
**
** If this interface is invoked outside the context of an xConnect or
** xCreate virtual table method then the behavior is undefined.
**
** At present, there is only one option that may be configured using
** this function. (See [SQLITE_VTAB_CONSTRAINT_SUPPORT].)  Further options
** may be added in the future.
*/
SQLITE_API int sqlite3_vtab_config(sqlite3*, int op, ...);

/*
** CAPI3REF: Virtual Table Configuration Options
**
** These macros define the various options to the
** [sqlite3_vtab_config()] interface that [virtual table] implementations
** can use to customize and optimize their behavior.
**
** <dl>
** <dt>SQLITE_VTAB_CONSTRAINT_SUPPORT
** <dd>Calls of the form
** [sqlite3_vtab_config](db,SQLITE_VTAB_CONSTRAINT_SUPPORT,X) are supported,
** where X is an integer.  If X is zero, then the [virtual table] whose
** [xCreate] or [xConnect] method invoked [sqlite3_vtab_config()] does not
** support constraints.  In this configuration (which is the default) if
** a call to the [xUpdate] method returns [SQLITE_CONSTRAINT], then the entire
** statement is rolled back as if [ON CONFLICT | OR ABORT] had been
** specified as part of the users SQL statement, regardless of the actual
** ON CONFLICT mode specified.
**
** If X is non-zero, then the virtual table implementation guarantees
** that if [xUpdate] returns [SQLITE_CONSTRAINT], it will do so before
** any modifications to internal or persistent data structures have been made.
** If the [ON CONFLICT] mode is ABORT, FAIL, IGNORE or ROLLBACK, SQLite 
** is able to roll back a statement or database transaction, and abandon
** or continue processing the current SQL statement as appropriate. 
** If the ON CONFLICT mode is REPLACE and the [xUpdate] method returns
** [SQLITE_CONSTRAINT], SQLite handles this as if the ON CONFLICT mode
** had been ABORT.
**
** Virtual table implementations that are required to handle OR REPLACE
** must do so within the [xUpdate] method. If a call to the 
** [sqlite3_vtab_on_conflict()] function indicates that the current ON 
** CONFLICT policy is REPLACE, the virtual table implementation should 
** silently replace the appropriate rows within the xUpdate callback and
** return SQLITE_OK. Or, if this is not possible, it may return
** SQLITE_CONSTRAINT, in which case SQLite falls back to OR ABORT 
** constraint handling.
** </dl>
*/
#define SQLITE_VTAB_CONSTRAINT_SUPPORT 1

/*
** CAPI3REF: Determine The Virtual Table Conflict Policy
**
** This function may only be called from within a call to the [xUpdate] method
** of a [virtual table] implementation for an INSERT or UPDATE operation. ^The
** value returned is one of [SQLITE_ROLLBACK], [SQLITE_IGNORE], [SQLITE_FAIL],
** [SQLITE_ABORT], or [SQLITE_REPLACE], according to the [ON CONFLICT] mode
** of the SQL statement that triggered the call to the [xUpdate] method of the
** [virtual table].
*/
SQLITE_API int sqlite3_vtab_on_conflict(sqlite3 *);

/*
** CAPI3REF: Conflict resolution modes
**
** These constants are returned by [sqlite3_vtab_on_conflict()] to
** inform a [virtual table] implementation what the [ON CONFLICT] mode
** is for the SQL statement being evaluated.
**
** Note that the [SQLITE_IGNORE] constant is also used as a potential
** return value from the [sqlite3_set_authorizer()] callback and that
** [SQLITE_ABORT] is also a [result code].
*/
#define SQLITE_ROLLBACK 1
/* #define SQLITE_IGNORE 2 // Also used by sqlite3_authorizer() callback */
#define SQLITE_FAIL     3
/* #define SQLITE_ABORT 4  // Also an error code */
#define SQLITE_REPLACE  5



/*
** Undo the hack that converts floating point types to integer for
** builds on processors without floating point support.
*/
#ifdef SQLITE_OMIT_FLOATING_POINT
# undef double
#endif

#ifdef __cplusplus
}  /* End of the 'extern "C"' block */
#endif
#endif /* _SQLITE3_H_ */

/*
** 2010 August 30
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
*/

#ifndef _SQLITE3RTREE_H_
#define _SQLITE3RTREE_H_


#ifdef __cplusplus
extern "C" {
#endif

typedef struct sqlite3_rtree_geometry sqlite3_rtree_geometry;

/*
** Register a geometry callback named zGeom that can be used as part of an
** R-Tree geometry query as follows:
**
**   SELECT ... FROM <rtree> WHERE <rtree col> MATCH $zGeom(... params ...)
*/
SQLITE_API int sqlite3_rtree_geometry_callback(
  sqlite3 *db,
  const char *zGeom,
#ifdef SQLITE_RTREE_INT_ONLY
  int (*xGeom)(sqlite3_rtree_geometry*, int n, sqlite3_int64 *a, int *pRes),
#else
  int (*xGeom)(sqlite3_rtree_geometry*, int n, double *a, int *pRes),
#endif
  void *pContext
);


/*
** A pointer to a structure of the following type is passed as the first
** argument to callbacks registered using rtree_geometry_callback().
*/
struct sqlite3_rtree_geometry {
  void *pContext;                 /* Copy of pContext passed to s_r_g_c() */
  int nParam;                     /* Size of array aParam[] */
  double *aParam;                 /* Parameters passed to SQL geom function */
  void *pUser;                    /* Callback implementation user data */
  void (*xDelUser)(void *);       /* Called by SQLite to clean up pUser */
};


#ifdef __cplusplus
}  /* end of the 'extern "C"' block */
#endif

#endif  /* ifndef _SQLITE3RTREE_H_ */







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# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must *NOT* be checked into Version Control Systems,
# as it contains information specific to your local configuration.

# location of the SDK. This is only used by Ant
# For customization when using a Version Control System, please read the
# header note.
sdk.dir=/home/dan/android2/adt-bundle-linux-x86-20131030/sdk






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# to define the proguard.config property as described in that file.
#
# Add project specific ProGuard rules here.
# By default, the flags in this file are appended to flags specified
# in ${sdk.dir}/tools/proguard/proguard-android.txt
# You can edit the include path and order by changing the ProGuard
# include property in project.properties.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

# Add any project specific keep options here:

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}






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# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system edit
# "ant.properties", and override values to adapt the script to your
# project structure.
#
# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt

# Project target.
target=android-19






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<?xml version="1.0" encoding="utf-8"?>
<ScrollView
  xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
      android:layout_height="fill_parent">

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="CustomSqlite Tests"
    android:typeface="monospace"
    />

<Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Run the tests"
        android:onClick="run_the_tests"
        />

<TextView
    android:id="@+id/tv_widget"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="&lt;this text should be replaced by the test output&gt;"
    android:typeface="monospace"
    />
</LinearLayout>
</ScrollView>







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<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">CustomSqlite</string>
</resources>






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include ':sqlite3', ':sqlite3test'






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apply plugin: 'com.android.library'

android {
    compileSdkVersion 23
    buildToolsVersion '24.0.3'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    sourceSets.main.jni.srcDirs = [] //disable automatic ndk-build call

    sourceSets.main {
        jniLibs.srcDir 'src/main/libs'
    }

}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
}






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# Add project specific ProGuard rules here.
# By default, the flags in this file are appended to flags specified
# in /home/dan/Android/Sdk/tools/proguard/proguard-android.txt
# You can edit the include path and order by changing the proguardFiles
# directive in build.gradle.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

# Add any project specific keep options here:

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}






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package org.sqlite.database;

import android.app.Application;
import android.test.ApplicationTestCase;

/**
 * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
 */
public class ApplicationTest extends ApplicationTestCase<Application> {
    public ApplicationTest() {
        super(Application.class);
    }
}






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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.sqlite.database">

    <application
        android:allowBackup="true"
        android:label="@string/app_name"
        android:supportsRtl="true">

    </application>

</manifest>






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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database;

import org.sqlite.database.sqlite.SQLiteDatabase;

/**
 * An interface to let the apps define the actions to take when the following errors are detected
 *   database corruption
 */
public interface DatabaseErrorHandler {

    /**
     * defines the method to be invoked when database corruption is detected.
     * @param dbObj the {@link SQLiteDatabase} object representing the database on which corruption
     * is detected.
     */
    void onCorruption(SQLiteDatabase dbObj);
}






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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database;

import java.io.File;
import java.util.List;

import org.sqlite.database.sqlite.SQLiteDatabase;
import org.sqlite.database.sqlite.SQLiteException;
import android.util.Log;
import android.util.Pair;

/**
 * Default class used to define the actions to take when the database corruption is reported
 * by sqlite.
 * <p>
 * An application can specify an implementation of {@link DatabaseErrorHandler} on the
 * following:
 * <ul>
 *   <li>{@link SQLiteDatabase#openOrCreateDatabase(String,
 *      org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory, DatabaseErrorHandler)}</li>
 *   <li>{@link SQLiteDatabase#openDatabase(String,
 *      org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory, int, DatabaseErrorHandler)}</li>
 * </ul>
 * The specified {@link DatabaseErrorHandler} is used to handle database corruption errors, if they
 * occur.
 * <p>
 * If null is specified for DatabaeErrorHandler param in the above calls, then this class is used
 * as the default {@link DatabaseErrorHandler}.
 */
public final class DefaultDatabaseErrorHandler implements DatabaseErrorHandler {

    private static final String TAG = "DefaultDatabaseErrorHandler";

    /**
     * defines the default method to be invoked when database corruption is detected.
     * @param dbObj the {@link SQLiteDatabase} object representing the database on which corruption
     * is detected.
     */
    public void onCorruption(SQLiteDatabase dbObj) {
        Log.e(TAG, "Corruption reported by sqlite on database: " + dbObj.getPath());

	// If this is a SEE build, do not delete any database files.
	//
	if( SQLiteDatabase.hasCodec() ) return;

        // is the corruption detected even before database could be 'opened'?
        if (!dbObj.isOpen()) {
            // database files are not even openable. delete this database file.
            // NOTE if the database has attached databases, then any of them could be corrupt.
            // and not deleting all of them could cause corrupted database file to remain and 
            // make the application crash on database open operation. To avoid this problem,
            // the application should provide its own {@link DatabaseErrorHandler} impl class
            // to delete ALL files of the database (including the attached databases).
            deleteDatabaseFile(dbObj.getPath());
            return;
        }

        List<Pair<String, String>> attachedDbs = null;
        try {
            // Close the database, which will cause subsequent operations to fail.
            // before that, get the attached database list first.
            try {
                attachedDbs = dbObj.getAttachedDbs();
            } catch (SQLiteException e) {
                /* ignore */
            }
            try {
                dbObj.close();
            } catch (SQLiteException e) {
                /* ignore */
            }
        } finally {
            // Delete all files of this corrupt database and/or attached databases
            if (attachedDbs != null) {
                for (Pair<String, String> p : attachedDbs) {
                    deleteDatabaseFile(p.second);
                }
            } else {
                // attachedDbs = null is possible when the database is so corrupt that even
                // "PRAGMA database_list;" also fails. delete the main database file
                deleteDatabaseFile(dbObj.getPath());
            }
        }
    }

    private void deleteDatabaseFile(String fileName) {
        if (fileName.equalsIgnoreCase(":memory:") || fileName.trim().length() == 0) {
            return;
        }
        Log.e(TAG, "deleting the database file: " + fileName);
        try {
            SQLiteDatabase.deleteDatabase(new File(fileName));
        } catch (Exception e) {
            /* print warning and ignore exception */
            Log.w(TAG, "delete failed: " + e.getMessage());
        }
    }
}






Added sqlite3/src/main/java/org/sqlite/database/ExtraUtils.java.






















































































































































































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database;
import android.database.Cursor;
import android.database.CursorWindow;

/* import org.apache.commons.codec.binary.Hex; */

import android.content.ContentValues;
import android.content.Context;
import android.content.OperationApplicationException;
import org.sqlite.database.sqlite.SQLiteAbortException;
import org.sqlite.database.sqlite.SQLiteConstraintException;
import org.sqlite.database.sqlite.SQLiteDatabase;
import org.sqlite.database.sqlite.SQLiteDatabaseCorruptException;
import org.sqlite.database.sqlite.SQLiteDiskIOException;
import org.sqlite.database.sqlite.SQLiteException;
import org.sqlite.database.sqlite.SQLiteFullException;
import org.sqlite.database.sqlite.SQLiteProgram;
import org.sqlite.database.sqlite.SQLiteStatement;
import android.os.OperationCanceledException;
import android.os.Parcel;
import android.os.ParcelFileDescriptor;
import android.text.TextUtils;
import android.util.Log;

import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.text.Collator;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

/**
 * Static utility methods for dealing with databases and {@link Cursor}s.
 */
public class ExtraUtils {
    private static final String TAG = "ExtraUtils";

    private static final boolean DEBUG = false;

    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_SELECT = 1;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_UPDATE = 2;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_ATTACH = 3;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_BEGIN = 4;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_COMMIT = 5;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_ABORT = 6;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_PRAGMA = 7;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_DDL = 8;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_UNPREPARED = 9;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_OTHER = 99;

    /**
     * Returns column index of "_id" column, or -1 if not found.
     */
    public static int findRowIdColumnIndex(String[] columnNames) {
        int length = columnNames.length;
        for (int i = 0; i < length; i++) {
            if (columnNames[i].equals("_id")) {
                return i;
            }
        }
        return -1;
    }

    /**
     * Picks a start position for {@link Cursor#fillWindow} such that the
     * window will contain the requested row and a useful range of rows
     * around it.
     *
     * When the data set is too large to fit in a cursor window, seeking the
     * cursor can become a very expensive operation since we have to run the
     * query again when we move outside the bounds of the current window.
     *
     * We try to choose a start position for the cursor window such that
     * 1/3 of the window's capacity is used to hold rows before the requested
     * position and 2/3 of the window's capacity is used to hold rows after the
     * requested position.
     *
     * @param cursorPosition The row index of the row we want to get.
     * @param cursorWindowCapacity The estimated number of rows that can fit in
     * a cursor window, or 0 if unknown.
     * @return The recommended start position, always less than or equal to
     * the requested row.
     * @hide
     */
    public static int cursorPickFillWindowStartPosition(
            int cursorPosition, int cursorWindowCapacity) {
        return Math.max(cursorPosition - cursorWindowCapacity / 3, 0);
    }

    /**
     * Returns data type of the given object's value.
     *<p>
     * Returned values are
     * <ul>
     *   <li>{@link Cursor#FIELD_TYPE_NULL}</li>
     *   <li>{@link Cursor#FIELD_TYPE_INTEGER}</li>
     *   <li>{@link Cursor#FIELD_TYPE_FLOAT}</li>
     *   <li>{@link Cursor#FIELD_TYPE_STRING}</li>
     *   <li>{@link Cursor#FIELD_TYPE_BLOB}</li>
     *</ul>
     *</p>
     *
     * @param obj the object whose value type is to be returned
     * @return object value type
     */
    public static int getTypeOfObject(Object obj) {
        if (obj == null) {
            return Cursor.FIELD_TYPE_NULL;
        } else if (obj instanceof byte[]) {
            return Cursor.FIELD_TYPE_BLOB;
        } else if (obj instanceof Float || obj instanceof Double) {
            return Cursor.FIELD_TYPE_FLOAT;
        } else if (obj instanceof Long || obj instanceof Integer
                || obj instanceof Short || obj instanceof Byte) {
            return Cursor.FIELD_TYPE_INTEGER;
        } else {
            return Cursor.FIELD_TYPE_STRING;
        }
    }

    /**
     * Utility method to run the query on the db and return the value in the
     * first column of the first row.
     */
    public static long longForQuery(
        SQLiteDatabase db, String query, String[] selectionArgs
    ) {
        SQLiteStatement prog = db.compileStatement(query);
        try {
            return longForQuery(prog, selectionArgs);
        } finally {
            prog.close();
        }
    }

    /**
     * Utility method to run the pre-compiled query and return the value in the
     * first column of the first row.
     */
    public static long longForQuery(
        SQLiteStatement prog, String[] selectionArgs
    ) {
        prog.bindAllArgsAsStrings(selectionArgs);
        return prog.simpleQueryForLong();
    }
}






Added sqlite3/src/main/java/org/sqlite/database/SQLException.java.











































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database;

/**
 * An exception that indicates there was an error with SQL parsing or execution.
 */
public class SQLException extends RuntimeException {
    public SQLException() {
    }

    public SQLException(String error) {
        super(error);
    }

    public SQLException(String error, Throwable cause) {
        super(error, cause);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/package.html.




















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<HTML>
<BODY>
Contains classes to explore data returned through a content provider.
<p>
If you need to manage data in a private database, use the {@link
android.database.sqlite} classes. These classes are used to manage the {@link
android.database.Cursor} object returned from a content provider query. Databases
are usually created and opened with {@link android.content.Context#openOrCreateDatabase}
To make requests through
content providers, you can use the {@link android.content.ContentResolver
content.ContentResolver} class.
<p>All databases are stored on the device in <code>/data/data/&lt;package_name&gt;/databases</code>
</BODY>
</HTML>






Added sqlite3/src/main/java/org/sqlite/database/sqlite/CloseGuard.java.

















































































































































































































































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;
import android.util.Log;

/**
 * CloseGuard is a mechanism for flagging implicit finalizer cleanup of
 * resources that should have been cleaned up by explicit close
 * methods (aka "explicit termination methods" in Effective Java).
 * <p>
 * A simple example: <pre>   {@code
 *   class Foo {
 *
 *       private final CloseGuard guard = CloseGuard.get();
 *
 *       ...
 *
 *       public Foo() {
 *           ...;
 *           guard.open("cleanup");
 *       }
 *
 *       public void cleanup() {
 *          guard.close();
 *          ...;
 *       }
 *
 *       protected void finalize() throws Throwable {
 *           try {
 *               if (guard != null) {
 *                   guard.warnIfOpen();
 *               }
 *               cleanup();
 *           } finally {
 *               super.finalize();
 *           }
 *       }
 *   }
 * }</pre>
 *
 * In usage where the resource to be explicitly cleaned up are
 * allocated after object construction, CloseGuard protection can
 * be deferred. For example: <pre>   {@code
 *   class Bar {
 *
 *       private final CloseGuard guard = CloseGuard.get();
 *
 *       ...
 *
 *       public Bar() {
 *           ...;
 *       }
 *
 *       public void connect() {
 *          ...;
 *          guard.open("cleanup");
 *       }
 *
 *       public void cleanup() {
 *          guard.close();
 *          ...;
 *       }
 *
 *       protected void finalize() throws Throwable {
 *           try {
 *               if (guard != null) {
 *                   guard.warnIfOpen();
 *               }
 *               cleanup();
 *           } finally {
 *               super.finalize();
 *           }
 *       }
 *   }
 * }</pre>
 *
 * When used in a constructor calls to {@code open} should occur at
 * the end of the constructor since an exception that would cause
 * abrupt termination of the constructor will mean that the user will
 * not have a reference to the object to cleanup explicitly. When used
 * in a method, the call to {@code open} should occur just after
 * resource acquisition.
 *
 * <p>
 *
 * Note that the null check on {@code guard} in the finalizer is to
 * cover cases where a constructor throws an exception causing the
 * {@code guard} to be uninitialized.
 *
 * @hide
 */
public final class CloseGuard {

    /**
     * Instance used when CloseGuard is disabled to avoid allocation.
     */
    private static final CloseGuard NOOP = new CloseGuard();

    /**
     * Enabled by default so we can catch issues early in VM startup.
     * Note, however, that Android disables this early in its startup,
     * but enables it with DropBoxing for system apps on debug builds.
     */
    private static volatile boolean ENABLED = true;

    /**
     * Hook for customizing how CloseGuard issues are reported.
     */
    private static volatile Reporter REPORTER = new DefaultReporter();

    /**
     * Returns a CloseGuard instance. If CloseGuard is enabled, {@code
     * #open(String)} can be used to set up the instance to warn on
     * failure to close. If CloseGuard is disabled, a non-null no-op
     * instance is returned.
     */
    public static CloseGuard get() {
        if (!ENABLED) {
            return NOOP;
        }
        return new CloseGuard();
    }

    /**
     * Used to enable or disable CloseGuard. Note that CloseGuard only
     * warns if it is enabled for both allocation and finalization.
     */
    public static void setEnabled(boolean enabled) {
        ENABLED = enabled;
    }

    /**
     * Used to replace default Reporter used to warn of CloseGuard
     * violations. Must be non-null.
     */
    public static void setReporter(Reporter reporter) {
        if (reporter == null) {
            throw new NullPointerException("reporter == null");
        }
        REPORTER = reporter;
    }

    /**
     * Returns non-null CloseGuard.Reporter.
     */
    public static Reporter getReporter() {
        return REPORTER;
    }

    private CloseGuard() {}

    /**
     * If CloseGuard is enabled, {@code open} initializes the instance
     * with a warning that the caller should have explicitly called the
     * {@code closer} method instead of relying on finalization.
     *
     * @param closer non-null name of explicit termination method
     * @throws NullPointerException if closer is null, regardless of
     * whether or not CloseGuard is enabled
     */
    public void open(String closer) {
        // always perform the check for valid API usage...
        if (closer == null) {
            throw new NullPointerException("closer == null");
        }
        // ...but avoid allocating an allocationSite if disabled
        if (this == NOOP || !ENABLED) {
            return;
        }
        String message = "Explicit termination method '" + closer + "' not called";
        allocationSite = new Throwable(message);
    }

    private Throwable allocationSite;

    /**
     * Marks this CloseGuard instance as closed to avoid warnings on
     * finalization.
     */
    public void close() {
        allocationSite = null;
    }

    /**
     * If CloseGuard is enabled, logs a warning if the caller did not
     * properly cleanup by calling an explicit close method
     * before finalization. If CloseGuard is disabled, no action is
     * performed.
     */
    public void warnIfOpen() {
        if (allocationSite == null || !ENABLED) {
            return;
        }

        String message =
                ("A resource was acquired at attached stack trace but never released. "
                 + "See java.io.Closeable for information on avoiding resource leaks.");

        REPORTER.report(message, allocationSite);
    }

    /**
     * Interface to allow customization of reporting behavior.
     */
    public static interface Reporter {
        public void report (String message, Throwable allocationSite);
    }

    /**
     * Default Reporter which reports CloseGuard violations to the log.
     */
    private static final class DefaultReporter implements Reporter {
        @Override public void report (String message, Throwable allocationSite) {
            Log.w(message, allocationSite);
        }
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/DatabaseObjectNotClosedException.java.









































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that garbage-collector is finalizing a database object
 * that is not explicitly closed
 * @hide
 */
public class DatabaseObjectNotClosedException extends RuntimeException {
    private static final String s = "Application did not close the cursor or database object " +
            "that was opened here";

    public DatabaseObjectNotClosedException() {
        super(s);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteAbortException.java.








































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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that the SQLite program was aborted.
 * This can happen either through a call to ABORT in a trigger,
 * or as the result of using the ABORT conflict clause.
 */
public class SQLiteAbortException extends SQLiteException {
    public SQLiteAbortException() {}

    public SQLiteAbortException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteAccessPermException.java.







































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * This exception class is used when sqlite can't access the database file
 * due to lack of permissions on the file.
 */
public class SQLiteAccessPermException extends SQLiteException {
    public SQLiteAccessPermException() {}

    public SQLiteAccessPermException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteBindOrColumnIndexOutOfRangeException.java.






































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * Thrown if the the bind or column parameter index is out of range
 */
public class SQLiteBindOrColumnIndexOutOfRangeException extends SQLiteException {
    public SQLiteBindOrColumnIndexOutOfRangeException() {}

    public SQLiteBindOrColumnIndexOutOfRangeException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteBlobTooBigException.java.



































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

public class SQLiteBlobTooBigException extends SQLiteException {
    public SQLiteBlobTooBigException() {}

    public SQLiteBlobTooBigException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteCantOpenDatabaseException.java.



































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

public class SQLiteCantOpenDatabaseException extends SQLiteException {
    public SQLiteCantOpenDatabaseException() {}

    public SQLiteCantOpenDatabaseException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteClosable.java.






















































































































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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import java.io.Closeable;

/**
 * An object created from a SQLiteDatabase that can be closed.
 *
 * This class implements a primitive reference counting scheme for database objects.
 */
public abstract class SQLiteClosable implements Closeable {
    private int mReferenceCount = 1;

    /**
     * Called when the last reference to the object was released by
     * a call to {@link #releaseReference()} or {@link #close()}.
     */
    protected abstract void onAllReferencesReleased();

    /**
     * Called when the last reference to the object was released by
     * a call to {@link #releaseReferenceFromContainer()}.
     *
     * @deprecated Do not use.
     */
    @Deprecated
    protected void onAllReferencesReleasedFromContainer() {
        onAllReferencesReleased();
    }

    /**
     * Acquires a reference to the object.
     *
     * @throws IllegalStateException if the last reference to the object has already
     * been released.
     */
    public void acquireReference() {
        synchronized(this) {
            if (mReferenceCount <= 0) {
                throw new IllegalStateException(
                        "attempt to re-open an already-closed object: " + this);
            }
            mReferenceCount++;
        }
    }

    /**
     * Releases a reference to the object, closing the object if the last reference
     * was released.
     *
     * @see #onAllReferencesReleased()
     */
    public void releaseReference() {
        boolean refCountIsZero = false;
        synchronized(this) {
            refCountIsZero = --mReferenceCount == 0;
        }
        if (refCountIsZero) {
            onAllReferencesReleased();
        }
    }

    /**
     * Releases a reference to the object that was owned by the container of the object,
     * closing the object if the last reference was released.
     *
     * @see #onAllReferencesReleasedFromContainer()
     * @deprecated Do not use.
     */
    @Deprecated
    public void releaseReferenceFromContainer() {
        boolean refCountIsZero = false;
        synchronized(this) {
            refCountIsZero = --mReferenceCount == 0;
        }
        if (refCountIsZero) {
            onAllReferencesReleasedFromContainer();
        }
    }

    /**
     * Releases a reference to the object, closing the object if the last reference
     * was released.
     *
     * Calling this method is equivalent to calling {@link #releaseReference}.
     *
     * @see #releaseReference()
     * @see #onAllReferencesReleased()
     */
    public void close() {
        releaseReference();
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteConnection.java.


















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/* import dalvik.system.BlockGuard; */
import org.sqlite.database.sqlite.CloseGuard;

import android.database.Cursor;
import android.database.CursorWindow;
import android.database.DatabaseUtils;
import org.sqlite.database.ExtraUtils;
import org.sqlite.database.sqlite.SQLiteDebug.DbStats;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.os.ParcelFileDescriptor;
import android.util.Log;
import android.util.LruCache;
import android.util.Printer;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Map;
import java.util.regex.Pattern;

/**
 * Represents a SQLite database connection.
 * Each connection wraps an instance of a native <code>sqlite3</code> object.
 * <p>
 * When database connection pooling is enabled, there can be multiple active
 * connections to the same database.  Otherwise there is typically only one
 * connection per database.
 * </p><p>
 * When the SQLite WAL feature is enabled, multiple readers and one writer
 * can concurrently access the database.  Without WAL, readers and writers
 * are mutually exclusive.
 * </p>
 *
 * <h2>Ownership and concurrency guarantees</h2>
 * <p>
 * Connection objects are not thread-safe.  They are acquired as needed to
 * perform a database operation and are then returned to the pool.  At any
 * given time, a connection is either owned and used by a {@link SQLiteSession}
 * object or the {@link SQLiteConnectionPool}.  Those classes are
 * responsible for serializing operations to guard against concurrent
 * use of a connection.
 * </p><p>
 * The guarantee of having a single owner allows this class to be implemented
 * without locks and greatly simplifies resource management.
 * </p>
 *
 * <h2>Encapsulation guarantees</h2>
 * <p>
 * The connection object object owns *all* of the SQLite related native
 * objects that are associated with the connection.  What's more, there are
 * no other objects in the system that are capable of obtaining handles to
 * those native objects.  Consequently, when the connection is closed, we do
 * not have to worry about what other components might have references to
 * its associated SQLite state -- there are none.
 * </p><p>
 * Encapsulation is what ensures that the connection object's
 * lifecycle does not become a tortured mess of finalizers and reference
 * queues.
 * </p>
 *
 * <h2>Reentrance</h2>
 * <p>
 * This class must tolerate reentrant execution of SQLite operations because
 * triggers may call custom SQLite functions that perform additional queries.
 * </p>
 *
 * @hide
 */
public final class SQLiteConnection implements CancellationSignal.OnCancelListener {
    private static final String TAG = "SQLiteConnection";
    private static final boolean DEBUG = false;

    private static final String[] EMPTY_STRING_ARRAY = new String[0];
    private static final byte[] EMPTY_BYTE_ARRAY = new byte[0];

    private static final Pattern TRIM_SQL_PATTERN = Pattern.compile("[\\s]*\\n+[\\s]*");

    private final CloseGuard mCloseGuard = CloseGuard.get();

    private final SQLiteConnectionPool mPool;
    private final SQLiteDatabaseConfiguration mConfiguration;
    private final int mConnectionId;
    private final boolean mIsPrimaryConnection;
    private final boolean mIsReadOnlyConnection;
    private final PreparedStatementCache mPreparedStatementCache;
    private PreparedStatement mPreparedStatementPool;

    // The recent operations log.
    private final OperationLog mRecentOperations = new OperationLog();

    // The native SQLiteConnection pointer.  (FOR INTERNAL USE ONLY)
    private long mConnectionPtr;

    private boolean mOnlyAllowReadOnlyOperations;

    // The number of times attachCancellationSignal has been called.
    // Because SQLite statement execution can be reentrant, we keep track of how many
    // times we have attempted to attach a cancellation signal to the connection so that
    // we can ensure that we detach the signal at the right time.
    private int mCancellationSignalAttachCount;

    private static native long nativeOpen(String path, int openFlags, String label,
            boolean enableTrace, boolean enableProfile);
    private static native void nativeClose(long connectionPtr);
    private static native void nativeRegisterCustomFunction(long connectionPtr,
            SQLiteCustomFunction function);
    private static native void nativeRegisterLocalizedCollators(long connectionPtr, String locale);
    private static native long nativePrepareStatement(long connectionPtr, String sql);
    private static native void nativeFinalizeStatement(long connectionPtr, long statementPtr);
    private static native int nativeGetParameterCount(long connectionPtr, long statementPtr);
    private static native boolean nativeIsReadOnly(long connectionPtr, long statementPtr);
    private static native int nativeGetColumnCount(long connectionPtr, long statementPtr);
    private static native String nativeGetColumnName(long connectionPtr, long statementPtr,
            int index);
    private static native void nativeBindNull(long connectionPtr, long statementPtr,
            int index);
    private static native void nativeBindLong(long connectionPtr, long statementPtr,
            int index, long value);
    private static native void nativeBindDouble(long connectionPtr, long statementPtr,
            int index, double value);
    private static native void nativeBindString(long connectionPtr, long statementPtr,
            int index, String value);
    private static native void nativeBindBlob(long connectionPtr, long statementPtr,
            int index, byte[] value);
    private static native void nativeResetStatementAndClearBindings(
            long connectionPtr, long statementPtr);
    private static native void nativeExecute(long connectionPtr, long statementPtr);
    private static native long nativeExecuteForLong(long connectionPtr, long statementPtr);
    private static native String nativeExecuteForString(long connectionPtr, long statementPtr);
    private static native int nativeExecuteForBlobFileDescriptor(
            long connectionPtr, long statementPtr);
    private static native int nativeExecuteForChangedRowCount(long connectionPtr, long statementPtr);
    private static native long nativeExecuteForLastInsertedRowId(
            long connectionPtr, long statementPtr);
    private static native long nativeExecuteForCursorWindow(
            long connectionPtr, long statementPtr, CursorWindow win,
            int startPos, int requiredPos, boolean countAllRows);
    private static native int nativeGetDbLookaside(long connectionPtr);
    private static native void nativeCancel(long connectionPtr);
    private static native void nativeResetCancel(long connectionPtr, boolean cancelable);

    private static native boolean nativeHasCodec();
    public static boolean hasCodec(){ return nativeHasCodec(); }

    private SQLiteConnection(SQLiteConnectionPool pool,
            SQLiteDatabaseConfiguration configuration,
            int connectionId, boolean primaryConnection) {
        mPool = pool;
        mConfiguration = new SQLiteDatabaseConfiguration(configuration);
        mConnectionId = connectionId;
        mIsPrimaryConnection = primaryConnection;
        mIsReadOnlyConnection = (configuration.openFlags & SQLiteDatabase.OPEN_READONLY) != 0;
        mPreparedStatementCache = new PreparedStatementCache(
                mConfiguration.maxSqlCacheSize);
        mCloseGuard.open("close");
    }

    @Override
    protected void finalize() throws Throwable {
        try {
            if (mPool != null && mConnectionPtr != 0) {
                mPool.onConnectionLeaked();
            }

            dispose(true);
        } finally {
            super.finalize();
        }
    }

    // Called by SQLiteConnectionPool only.
    static SQLiteConnection open(SQLiteConnectionPool pool,
            SQLiteDatabaseConfiguration configuration,
            int connectionId, boolean primaryConnection) {
        SQLiteConnection connection = new SQLiteConnection(pool, configuration,
                connectionId, primaryConnection);
        try {
            connection.open();
            return connection;
        } catch (SQLiteException ex) {
            connection.dispose(false);
            throw ex;
        }
    }

    // Called by SQLiteConnectionPool only.
    // Closes the database closes and releases all of its associated resources.
    // Do not call methods on the connection after it is closed.  It will probably crash.
    void close() {
        dispose(false);
    }

    private void open() {
        mConnectionPtr = nativeOpen(mConfiguration.path, mConfiguration.openFlags,
                mConfiguration.label,
                SQLiteDebug.DEBUG_SQL_STATEMENTS, SQLiteDebug.DEBUG_SQL_TIME);

        setPageSize();
        setForeignKeyModeFromConfiguration();
        setJournalSizeLimit();
	setAutoCheckpointInterval();
	if( !nativeHasCodec() ){
	  setWalModeFromConfiguration();
          setLocaleFromConfiguration();
	}

        // Register custom functions.
        final int functionCount = mConfiguration.customFunctions.size();
        for (int i = 0; i < functionCount; i++) {
            SQLiteCustomFunction function = mConfiguration.customFunctions.get(i);
            nativeRegisterCustomFunction(mConnectionPtr, function);
        }
    }

    private void dispose(boolean finalized) {
        if (mCloseGuard != null) {
            if (finalized) {
                mCloseGuard.warnIfOpen();
            }
            mCloseGuard.close();
        }

        if (mConnectionPtr != 0) {
            final int cookie = mRecentOperations.beginOperation("close", null, null);
            try {
                mPreparedStatementCache.evictAll();
                nativeClose(mConnectionPtr);
                mConnectionPtr = 0;
            } finally {
                mRecentOperations.endOperation(cookie);
            }
        }
    }

    private void setPageSize() {
        if (!mConfiguration.isInMemoryDb() && !mIsReadOnlyConnection) {
            final long newValue = SQLiteGlobal.getDefaultPageSize();
            long value = executeForLong("PRAGMA page_size", null, null);
            if (value != newValue) {
                execute("PRAGMA page_size=" + newValue, null, null);
            }
        }
    }

    private void setAutoCheckpointInterval() {
        if (!mConfiguration.isInMemoryDb() && !mIsReadOnlyConnection) {
            final long newValue = SQLiteGlobal.getWALAutoCheckpoint();
            long value = executeForLong("PRAGMA wal_autocheckpoint", null, null);
            if (value != newValue) {
                executeForLong("PRAGMA wal_autocheckpoint=" + newValue, null, null);
            }
        }
    }

    private void setJournalSizeLimit() {
        if (!mConfiguration.isInMemoryDb() && !mIsReadOnlyConnection) {
            final long newValue = SQLiteGlobal.getJournalSizeLimit();
            long value = executeForLong("PRAGMA journal_size_limit", null, null);
            if (value != newValue) {
                executeForLong("PRAGMA journal_size_limit=" + newValue, null, null);
            }
        }
    }

    private void setForeignKeyModeFromConfiguration() {
        if (!mIsReadOnlyConnection) {
            final long newValue = mConfiguration.foreignKeyConstraintsEnabled ? 1 : 0;
            long value = executeForLong("PRAGMA foreign_keys", null, null);
            if (value != newValue) {
                execute("PRAGMA foreign_keys=" + newValue, null, null);
            }
        }
    }

    private void setWalModeFromConfiguration() {
        if (!mConfiguration.isInMemoryDb() && !mIsReadOnlyConnection) {
            if ((mConfiguration.openFlags & SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING) != 0) {
                setJournalMode("WAL");
                setSyncMode(SQLiteGlobal.getWALSyncMode());
            } else {
                setJournalMode(SQLiteGlobal.getDefaultJournalMode());
                setSyncMode(SQLiteGlobal.getDefaultSyncMode());
            }
        }
    }

    private void setSyncMode(String newValue) {
        String value = executeForString("PRAGMA synchronous", null, null);
        if (!canonicalizeSyncMode(value).equalsIgnoreCase(
                canonicalizeSyncMode(newValue))) {
            execute("PRAGMA synchronous=" + newValue, null, null);
        }
    }

    private static String canonicalizeSyncMode(String value) {
        if (value.equals("0")) {
            return "OFF";
        } else if (value.equals("1")) {
            return "NORMAL";
        } else if (value.equals("2")) {
            return "FULL";
        }
        return value;
    }

    private void setJournalMode(String newValue) {
        String value = executeForString("PRAGMA journal_mode", null, null);
        if (!value.equalsIgnoreCase(newValue)) {
            try {
                String result = executeForString("PRAGMA journal_mode=" + newValue, null, null);
                if (result.equalsIgnoreCase(newValue)) {
                    return;
                }
                // PRAGMA journal_mode silently fails and returns the original journal
                // mode in some cases if the journal mode could not be changed.
            } catch (SQLiteDatabaseLockedException ex) {
                // This error (SQLITE_BUSY) occurs if one connection has the database
                // open in WAL mode and another tries to change it to non-WAL.
            }
            // Because we always disable WAL mode when a database is first opened
            // (even if we intend to re-enable it), we can encounter problems if
            // there is another open connection to the database somewhere.
            // This can happen for a variety of reasons such as an application opening
            // the same database in multiple processes at the same time or if there is a
            // crashing content provider service that the ActivityManager has
            // removed from its registry but whose process hasn't quite died yet
            // by the time it is restarted in a new process.
            //
            // If we don't change the journal mode, nothing really bad happens.
            // In the worst case, an application that enables WAL might not actually
            // get it, although it can still use connection pooling.
            Log.w(TAG, "Could not change the database journal mode of '"
                    + mConfiguration.label + "' from '" + value + "' to '" + newValue
                    + "' because the database is locked.  This usually means that "
                    + "there are other open connections to the database which prevents "
                    + "the database from enabling or disabling write-ahead logging mode.  "
                    + "Proceeding without changing the journal mode.");
        }
    }

    private void setLocaleFromConfiguration() {
        if ((mConfiguration.openFlags & SQLiteDatabase.NO_LOCALIZED_COLLATORS) != 0) {
            return;
        }

        // Register the localized collators.
        final String newLocale = mConfiguration.locale.toString();
        nativeRegisterLocalizedCollators(mConnectionPtr, newLocale);

        // If the database is read-only, we cannot modify the android metadata table
        // or existing indexes.
        if (mIsReadOnlyConnection) {
            return;
        }

        try {
            // Ensure the android metadata table exists.
            execute("CREATE TABLE IF NOT EXISTS android_metadata (locale TEXT)", null, null);

            // Check whether the locale was actually changed.
            final String oldLocale = executeForString("SELECT locale FROM android_metadata "
                    + "UNION SELECT NULL ORDER BY locale DESC LIMIT 1", null, null);
            if (oldLocale != null && oldLocale.equals(newLocale)) {
                return;
            }

            // Go ahead and update the indexes using the new locale.
            execute("BEGIN", null, null);
            boolean success = false;
            try {
                execute("DELETE FROM android_metadata", null, null);
                execute("INSERT INTO android_metadata (locale) VALUES(?)",
                        new Object[] { newLocale }, null);
                execute("REINDEX LOCALIZED", null, null);
                success = true;
            } finally {
                execute(success ? "COMMIT" : "ROLLBACK", null, null);
            }
        } catch (RuntimeException ex) {
            throw new SQLiteException("Failed to change locale for db '" + mConfiguration.label
                    + "' to '" + newLocale + "'.", ex);
        }
    }

    public void enableLocalizedCollators(){
      if( nativeHasCodec() ){
	setLocaleFromConfiguration();
      }
    }

    // Called by SQLiteConnectionPool only.
    void reconfigure(SQLiteDatabaseConfiguration configuration) {
        mOnlyAllowReadOnlyOperations = false;

        // Register custom functions.
        final int functionCount = configuration.customFunctions.size();
        for (int i = 0; i < functionCount; i++) {
            SQLiteCustomFunction function = configuration.customFunctions.get(i);
            if (!mConfiguration.customFunctions.contains(function)) {
                nativeRegisterCustomFunction(mConnectionPtr, function);
            }
        }

        // Remember what changed.
        boolean foreignKeyModeChanged = configuration.foreignKeyConstraintsEnabled
                != mConfiguration.foreignKeyConstraintsEnabled;
        boolean walModeChanged = ((configuration.openFlags ^ mConfiguration.openFlags)
                & SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING) != 0;
        boolean localeChanged = !configuration.locale.equals(mConfiguration.locale);

        // Update configuration parameters.
        mConfiguration.updateParametersFrom(configuration);

        // Update prepared statement cache size.
        /* mPreparedStatementCache.resize(configuration.maxSqlCacheSize); */

        // Update foreign key mode.
        if (foreignKeyModeChanged) {
            setForeignKeyModeFromConfiguration();
        }

        // Update WAL.
        if (walModeChanged) {
            setWalModeFromConfiguration();
        }

        // Update locale.
        if (localeChanged) {
            setLocaleFromConfiguration();
        }
    }

    // Called by SQLiteConnectionPool only.
    // When set to true, executing write operations will throw SQLiteException.
    // Preparing statements that might write is ok, just don't execute them.
    void setOnlyAllowReadOnlyOperations(boolean readOnly) {
        mOnlyAllowReadOnlyOperations = readOnly;
    }

    // Called by SQLiteConnectionPool only.
    // Returns true if the prepared statement cache contains the specified SQL.
    boolean isPreparedStatementInCache(String sql) {
        return mPreparedStatementCache.get(sql) != null;
    }

    /**
     * Gets the unique id of this connection.
     * @return The connection id.
     */
    public int getConnectionId() {
        return mConnectionId;
    }

    /**
     * Returns true if this is the primary database connection.
     * @return True if this is the primary database connection.
     */
    public boolean isPrimaryConnection() {
        return mIsPrimaryConnection;
    }

    /**
     * Prepares a statement for execution but does not bind its parameters or execute it.
     * <p>
     * This method can be used to check for syntax errors during compilation
     * prior to execution of the statement.  If the {@code outStatementInfo} argument
     * is not null, the provided {@link SQLiteStatementInfo} object is populated
     * with information about the statement.
     * </p><p>
     * A prepared statement makes no reference to the arguments that may eventually
     * be bound to it, consequently it it possible to cache certain prepared statements
     * such as SELECT or INSERT/UPDATE statements.  If the statement is cacheable,
     * then it will be stored in the cache for later.
     * </p><p>
     * To take advantage of this behavior as an optimization, the connection pool
     * provides a method to acquire a connection that already has a given SQL statement
     * in its prepared statement cache so that it is ready for execution.
     * </p>
     *
     * @param sql The SQL statement to prepare.
     * @param outStatementInfo The {@link SQLiteStatementInfo} object to populate
     * with information about the statement, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error.
     */
    public void prepare(String sql, SQLiteStatementInfo outStatementInfo) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("prepare", sql, null);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                if (outStatementInfo != null) {
                    outStatementInfo.numParameters = statement.mNumParameters;
                    outStatementInfo.readOnly = statement.mReadOnly;

                    final int columnCount = nativeGetColumnCount(
                            mConnectionPtr, statement.mStatementPtr);
                    if (columnCount == 0) {
                        outStatementInfo.columnNames = EMPTY_STRING_ARRAY;
                    } else {
                        outStatementInfo.columnNames = new String[columnCount];
                        for (int i = 0; i < columnCount; i++) {
                            outStatementInfo.columnNames[i] = nativeGetColumnName(
                                    mConnectionPtr, statement.mStatementPtr, i);
                        }
                    }
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that does not return a result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public void execute(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("execute", sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    nativeExecute(mConnectionPtr, statement.mStatementPtr);
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that returns a single <code>long</code> result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The value of the first column in the first row of the result set
     * as a <code>long</code>, or zero if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public long executeForLong(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("executeForLong", sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    return nativeExecuteForLong(mConnectionPtr, statement.mStatementPtr);
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that returns a single {@link String} result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The value of the first column in the first row of the result set
     * as a <code>String</code>, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public String executeForString(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("executeForString", sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    return nativeExecuteForString(mConnectionPtr, statement.mStatementPtr);
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that returns a single BLOB result as a
     * file descriptor to a shared memory region.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The file descriptor for a shared memory region that contains
     * the value of the first column in the first row of the result set as a BLOB,
     * or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public ParcelFileDescriptor executeForBlobFileDescriptor(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("executeForBlobFileDescriptor",
                sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    int fd = nativeExecuteForBlobFileDescriptor(
                            mConnectionPtr, statement.mStatementPtr);
                    return fd >= 0 ? ParcelFileDescriptor.adoptFd(fd) : null;
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that returns a count of the number of rows
     * that were changed.  Use for UPDATE or DELETE SQL statements.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The number of rows that were changed.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public int executeForChangedRowCount(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        int changedRows = 0;
        final int cookie = mRecentOperations.beginOperation("executeForChangedRowCount",
                sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    changedRows = nativeExecuteForChangedRowCount(
                            mConnectionPtr, statement.mStatementPtr);
                    return changedRows;
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            if (mRecentOperations.endOperationDeferLog(cookie)) {
                mRecentOperations.logOperation(cookie, "changedRows=" + changedRows);
            }
        }
    }

    /**
     * Executes a statement that returns the row id of the last row inserted
     * by the statement.  Use for INSERT SQL statements.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The row id of the last row that was inserted, or 0 if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public long executeForLastInsertedRowId(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("executeForLastInsertedRowId",
                sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    return nativeExecuteForLastInsertedRowId(
                            mConnectionPtr, statement.mStatementPtr);
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement and populates the specified {@link CursorWindow}
     * with a range of results.  Returns the number of rows that were counted
     * during query execution.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param window The cursor window to clear and fill.
     * @param startPos The start position for filling the window.
     * @param requiredPos The position of a row that MUST be in the window.
     * If it won't fit, then the query should discard part of what it filled
     * so that it does.  Must be greater than or equal to <code>startPos</code>.
     * @param countAllRows True to count all rows that the query would return
     * regagless of whether they fit in the window.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The number of rows that were counted during query execution.  Might
     * not be all rows in the result set unless <code>countAllRows</code> is true.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public int executeForCursorWindow(String sql, Object[] bindArgs,
            CursorWindow window, int startPos, int requiredPos, boolean countAllRows,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }
        if (window == null) {
            throw new IllegalArgumentException("window must not be null.");
        }

        window.acquireReference();
        try {
            int actualPos = -1;
            int countedRows = -1;
            int filledRows = -1;
            final int cookie = mRecentOperations.beginOperation("executeForCursorWindow",
                    sql, bindArgs);
            try {
                final PreparedStatement statement = acquirePreparedStatement(sql);
                try {
                    throwIfStatementForbidden(statement);
                    bindArguments(statement, bindArgs);
                    applyBlockGuardPolicy(statement);
                    attachCancellationSignal(cancellationSignal);
                    try {
                        final long result = nativeExecuteForCursorWindow(
                                mConnectionPtr, statement.mStatementPtr, window,
                                startPos, requiredPos, countAllRows);
                        actualPos = (int)(result >> 32);
                        countedRows = (int)result;
                        filledRows = window.getNumRows();
                        window.setStartPosition(actualPos);
                        return countedRows;
                    } finally {
                        detachCancellationSignal(cancellationSignal);
                    }
                } finally {
                    releasePreparedStatement(statement);
                }
            } catch (RuntimeException ex) {
                mRecentOperations.failOperation(cookie, ex);
                throw ex;
            } finally {
                if (mRecentOperations.endOperationDeferLog(cookie)) {
                    mRecentOperations.logOperation(cookie, "window='" + window
                            + "', startPos=" + startPos
                            + ", actualPos=" + actualPos
                            + ", filledRows=" + filledRows
                            + ", countedRows=" + countedRows);
                }
            }
        } finally {
            window.releaseReference();
        }
    }

    private PreparedStatement acquirePreparedStatement(String sql) {
        PreparedStatement statement = mPreparedStatementCache.get(sql);
        boolean skipCache = false;
        if (statement != null) {
            if (!statement.mInUse) {
                return statement;
            }
            // The statement is already in the cache but is in use (this statement appears
            // to be not only re-entrant but recursive!).  So prepare a new copy of the
            // statement but do not cache it.
            skipCache = true;
        }

        final long statementPtr = nativePrepareStatement(mConnectionPtr, sql);
        try {
            final int numParameters = nativeGetParameterCount(mConnectionPtr, statementPtr);
            final int type = DatabaseUtils.getSqlStatementType(sql);
            final boolean readOnly = nativeIsReadOnly(mConnectionPtr, statementPtr);
            statement = obtainPreparedStatement(sql, statementPtr, numParameters, type, readOnly);
            if (!skipCache && isCacheable(type)) {
                mPreparedStatementCache.put(sql, statement);
                statement.mInCache = true;
            }
        } catch (RuntimeException ex) {
            // Finalize the statement if an exception occurred and we did not add
            // it to the cache.  If it is already in the cache, then leave it there.
            if (statement == null || !statement.mInCache) {
                nativeFinalizeStatement(mConnectionPtr, statementPtr);
            }
            throw ex;
        }
        statement.mInUse = true;
        return statement;
    }

    private void releasePreparedStatement(PreparedStatement statement) {
        statement.mInUse = false;
        if (statement.mInCache) {
            try {
                nativeResetStatementAndClearBindings(mConnectionPtr, statement.mStatementPtr);
            } catch (SQLiteException ex) {
                // The statement could not be reset due to an error.  Remove it from the cache.
                // When remove() is called, the cache will invoke its entryRemoved() callback,
                // which will in turn call finalizePreparedStatement() to finalize and
                // recycle the statement.
                if (DEBUG) {
                    Log.d(TAG, "Could not reset prepared statement due to an exception.  "
                            + "Removing it from the cache.  SQL: "
                            + trimSqlForDisplay(statement.mSql), ex);
                }

                mPreparedStatementCache.remove(statement.mSql);
            }
        } else {
            finalizePreparedStatement(statement);
        }
    }

    private void finalizePreparedStatement(PreparedStatement statement) {
        nativeFinalizeStatement(mConnectionPtr, statement.mStatementPtr);
        recyclePreparedStatement(statement);
    }

    private void attachCancellationSignal(CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();

            mCancellationSignalAttachCount += 1;
            if (mCancellationSignalAttachCount == 1) {
                // Reset cancellation flag before executing the statement.
                nativeResetCancel(mConnectionPtr, true /*cancelable*/);

                // After this point, onCancel() may be called concurrently.
                cancellationSignal.setOnCancelListener(this);
            }
        }
    }

    private void detachCancellationSignal(CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            assert mCancellationSignalAttachCount > 0;

            mCancellationSignalAttachCount -= 1;
            if (mCancellationSignalAttachCount == 0) {
                // After this point, onCancel() cannot be called concurrently.
                cancellationSignal.setOnCancelListener(null);

                // Reset cancellation flag after executing the statement.
                nativeResetCancel(mConnectionPtr, false /*cancelable*/);
            }
        }
    }

    // CancellationSignal.OnCancelListener callback.
    // This method may be called on a different thread than the executing statement.
    // However, it will only be called between calls to attachCancellationSignal and
    // detachCancellationSignal, while a statement is executing.  We can safely assume
    // that the SQLite connection is still alive.
    @Override
    public void onCancel() {
        nativeCancel(mConnectionPtr);
    }

    private void bindArguments(PreparedStatement statement, Object[] bindArgs) {
        final int count = bindArgs != null ? bindArgs.length : 0;
        if (count != statement.mNumParameters) {
            throw new SQLiteBindOrColumnIndexOutOfRangeException(
                    "Expected " + statement.mNumParameters + " bind arguments but "
                    + count + " were provided.");
        }
        if (count == 0) {
            return;
        }

        final long statementPtr = statement.mStatementPtr;
        for (int i = 0; i < count; i++) {
            final Object arg = bindArgs[i];
            switch (ExtraUtils.getTypeOfObject(arg)) {
                case Cursor.FIELD_TYPE_NULL:
                    nativeBindNull(mConnectionPtr, statementPtr, i + 1);
                    break;
                case Cursor.FIELD_TYPE_INTEGER:
                    nativeBindLong(mConnectionPtr, statementPtr, i + 1,
                            ((Number)arg).longValue());
                    break;
                case Cursor.FIELD_TYPE_FLOAT:
                    nativeBindDouble(mConnectionPtr, statementPtr, i + 1,
                            ((Number)arg).doubleValue());
                    break;
                case Cursor.FIELD_TYPE_BLOB:
                    nativeBindBlob(mConnectionPtr, statementPtr, i + 1, (byte[])arg);
                    break;
                case Cursor.FIELD_TYPE_STRING:
                default:
                    if (arg instanceof Boolean) {
                        // Provide compatibility with legacy applications which may pass
                        // Boolean values in bind args.
                        nativeBindLong(mConnectionPtr, statementPtr, i + 1,
                                ((Boolean)arg).booleanValue() ? 1 : 0);
                    } else {
                        nativeBindString(mConnectionPtr, statementPtr, i + 1, arg.toString());
                    }
                    break;
            }
        }
    }

    private void throwIfStatementForbidden(PreparedStatement statement) {
        if (mOnlyAllowReadOnlyOperations && !statement.mReadOnly) {
            throw new SQLiteException("Cannot execute this statement because it "
                    + "might modify the database but the connection is read-only.");
        }
    }

    private static boolean isCacheable(int statementType) {
        if (statementType == DatabaseUtils.STATEMENT_UPDATE
                || statementType == DatabaseUtils.STATEMENT_SELECT) {
            return true;
        }
        return false;
    }

    private void applyBlockGuardPolicy(PreparedStatement statement) {
/*        if (!mConfiguration.isInMemoryDb()) {*/
/*            if (statement.mReadOnly) {*/
/*                BlockGuard.getThreadPolicy().onReadFromDisk();*/
/*            } else {*/
/*                BlockGuard.getThreadPolicy().onWriteToDisk();*/
/*            }*/
/*        }*/
    }

    /**
     * Dumps debugging information about this connection.
     *
     * @param printer The printer to receive the dump, not null.
     * @param verbose True to dump more verbose information.
     */
    public void dump(Printer printer, boolean verbose) {
        dumpUnsafe(printer, verbose);
    }

    /**
     * Dumps debugging information about this connection, in the case where the
     * caller might not actually own the connection.
     *
     * This function is written so that it may be called by a thread that does not
     * own the connection.  We need to be very careful because the connection state is
     * not synchronized.
     *
     * At worst, the method may return stale or slightly wrong data, however
     * it should not crash.  This is ok as it is only used for diagnostic purposes.
     *
     * @param printer The printer to receive the dump, not null.
     * @param verbose True to dump more verbose information.
     */
    void dumpUnsafe(Printer printer, boolean verbose) {
        printer.println("Connection #" + mConnectionId + ":");
        if (verbose) {
            printer.println("  connectionPtr: 0x" + Long.toHexString(mConnectionPtr));
        }
        printer.println("  isPrimaryConnection: " + mIsPrimaryConnection);
        printer.println("  onlyAllowReadOnlyOperations: " + mOnlyAllowReadOnlyOperations);

        mRecentOperations.dump(printer, verbose);

        if (verbose) {
            mPreparedStatementCache.dump(printer);
        }
    }

    /**
     * Describes the currently executing operation, in the case where the
     * caller might not actually own the connection.
     *
     * This function is written so that it may be called by a thread that does not
     * own the connection.  We need to be very careful because the connection state is
     * not synchronized.
     *
     * At worst, the method may return stale or slightly wrong data, however
     * it should not crash.  This is ok as it is only used for diagnostic purposes.
     *
     * @return A description of the current operation including how long it has been running,
     * or null if none.
     */
    String describeCurrentOperationUnsafe() {
        return mRecentOperations.describeCurrentOperation();
    }

    /**
     * Collects statistics about database connection memory usage.
     *
     * @param dbStatsList The list to populate.
     */
    void collectDbStats(ArrayList<DbStats> dbStatsList) {
        // Get information about the main database.
        int lookaside = nativeGetDbLookaside(mConnectionPtr);
        long pageCount = 0;
        long pageSize = 0;
        try {
            pageCount = executeForLong("PRAGMA page_count;", null, null);
            pageSize = executeForLong("PRAGMA page_size;", null, null);
        } catch (SQLiteException ex) {
            // Ignore.
        }
        dbStatsList.add(getMainDbStatsUnsafe(lookaside, pageCount, pageSize));

        // Get information about attached databases.
        // We ignore the first row in the database list because it corresponds to
        // the main database which we have already described.
        CursorWindow window = new CursorWindow("collectDbStats");
        try {
            executeForCursorWindow("PRAGMA database_list;", null, window, 0, 0, false, null);
            for (int i = 1; i < window.getNumRows(); i++) {
                String name = window.getString(i, 1);
                String path = window.getString(i, 2);
                pageCount = 0;
                pageSize = 0;
                try {
                    pageCount = executeForLong("PRAGMA " + name + ".page_count;", null, null);
                    pageSize = executeForLong("PRAGMA " + name + ".page_size;", null, null);
                } catch (SQLiteException ex) {
                    // Ignore.
                }
                String label = "  (attached) " + name;
                if (!path.isEmpty()) {
                    label += ": " + path;
                }
                dbStatsList.add(new DbStats(label, pageCount, pageSize, 0, 0, 0, 0));
            }
        } catch (SQLiteException ex) {
            // Ignore.
        } finally {
            window.close();
        }
    }

    /**
     * Collects statistics about database connection memory usage, in the case where the
     * caller might not actually own the connection.
     *
     * @return The statistics object, never null.
     */
    void collectDbStatsUnsafe(ArrayList<DbStats> dbStatsList) {
        dbStatsList.add(getMainDbStatsUnsafe(0, 0, 0));
    }

    private DbStats getMainDbStatsUnsafe(int lookaside, long pageCount, long pageSize) {
        // The prepared statement cache is thread-safe so we can access its statistics
        // even if we do not own the database connection.
        String label = mConfiguration.path;
        if (!mIsPrimaryConnection) {
            label += " (" + mConnectionId + ")";
        }
        return new DbStats(label, pageCount, pageSize, lookaside,
                mPreparedStatementCache.hitCount(),
                mPreparedStatementCache.missCount(),
                mPreparedStatementCache.size());
    }

    @Override
    public String toString() {
        return "SQLiteConnection: " + mConfiguration.path + " (" + mConnectionId + ")";
    }

    private PreparedStatement obtainPreparedStatement(String sql, long statementPtr,
            int numParameters, int type, boolean readOnly) {
        PreparedStatement statement = mPreparedStatementPool;
        if (statement != null) {
            mPreparedStatementPool = statement.mPoolNext;
            statement.mPoolNext = null;
            statement.mInCache = false;
        } else {
            statement = new PreparedStatement();
        }
        statement.mSql = sql;
        statement.mStatementPtr = statementPtr;
        statement.mNumParameters = numParameters;
        statement.mType = type;
        statement.mReadOnly = readOnly;
        return statement;
    }

    private void recyclePreparedStatement(PreparedStatement statement) {
        statement.mSql = null;
        statement.mPoolNext = mPreparedStatementPool;
        mPreparedStatementPool = statement;
    }

    private static String trimSqlForDisplay(String sql) {
        return TRIM_SQL_PATTERN.matcher(sql).replaceAll(" ");
    }

    /**
     * Holder type for a prepared statement.
     *
     * Although this object holds a pointer to a native statement object, it
     * does not have a finalizer.  This is deliberate.  The {@link SQLiteConnection}
     * owns the statement object and will take care of freeing it when needed.
     * In particular, closing the connection requires a guarantee of deterministic
     * resource disposal because all native statement objects must be freed before
     * the native database object can be closed.  So no finalizers here.
     */
    private static final class PreparedStatement {
        // Next item in pool.
        public PreparedStatement mPoolNext;

        // The SQL from which the statement was prepared.
        public String mSql;

        // The native sqlite3_stmt object pointer.
        // Lifetime is managed explicitly by the connection.
        public long mStatementPtr;

        // The number of parameters that the prepared statement has.
        public int mNumParameters;

        // The statement type.
        public int mType;

        // True if the statement is read-only.
        public boolean mReadOnly;

        // True if the statement is in the cache.
        public boolean mInCache;

        // True if the statement is in use (currently executing).
        // We need this flag because due to the use of custom functions in triggers, it's
        // possible for SQLite calls to be re-entrant.  Consequently we need to prevent
        // in use statements from being finalized until they are no longer in use.
        public boolean mInUse;
    }

    private final class PreparedStatementCache
            extends LruCache<String, PreparedStatement> {
        public PreparedStatementCache(int size) {
            super(size);
        }

        @Override
        protected void entryRemoved(boolean evicted, String key,
                PreparedStatement oldValue, PreparedStatement newValue) {
            oldValue.mInCache = false;
            if (!oldValue.mInUse) {
                finalizePreparedStatement(oldValue);
            }
        }

        public void dump(Printer printer) {
            printer.println("  Prepared statement cache:");
            Map<String, PreparedStatement> cache = snapshot();
            if (!cache.isEmpty()) {
                int i = 0;
                for (Map.Entry<String, PreparedStatement> entry : cache.entrySet()) {
                    PreparedStatement statement = entry.getValue();
                    if (statement.mInCache) { // might be false due to a race with entryRemoved
                        String sql = entry.getKey();
                        printer.println("    " + i + ": statementPtr=0x"
                                + Long.toHexString(statement.mStatementPtr)
                                + ", numParameters=" + statement.mNumParameters
                                + ", type=" + statement.mType
                                + ", readOnly=" + statement.mReadOnly
                                + ", sql=\"" + trimSqlForDisplay(sql) + "\"");
                    }
                    i += 1;
                }
            } else {
                printer.println("    <none>");
            }
        }
    }

    private static final class OperationLog {
        private static final int MAX_RECENT_OPERATIONS = 20;
        private static final int COOKIE_GENERATION_SHIFT = 8;
        private static final int COOKIE_INDEX_MASK = 0xff;

        private final Operation[] mOperations = new Operation[MAX_RECENT_OPERATIONS];
        private int mIndex;
        private int mGeneration;

        public int beginOperation(String kind, String sql, Object[] bindArgs) {
            synchronized (mOperations) {
                final int index = (mIndex + 1) % MAX_RECENT_OPERATIONS;
                Operation operation = mOperations[index];
                if (operation == null) {
                    operation = new Operation();
                    mOperations[index] = operation;
                } else {
                    operation.mFinished = false;
                    operation.mException = null;
                    if (operation.mBindArgs != null) {
                        operation.mBindArgs.clear();
                    }
                }
                operation.mStartTime = System.currentTimeMillis();
                operation.mKind = kind;
                operation.mSql = sql;
                if (bindArgs != null) {
                    if (operation.mBindArgs == null) {
                        operation.mBindArgs = new ArrayList<Object>();
                    } else {
                        operation.mBindArgs.clear();
                    }
                    for (int i = 0; i < bindArgs.length; i++) {
                        final Object arg = bindArgs[i];
                        if (arg != null && arg instanceof byte[]) {
                            // Don't hold onto the real byte array longer than necessary.
                            operation.mBindArgs.add(EMPTY_BYTE_ARRAY);
                        } else {
                            operation.mBindArgs.add(arg);
                        }
                    }
                }
                operation.mCookie = newOperationCookieLocked(index);
                mIndex = index;
                return operation.mCookie;
            }
        }

        public void failOperation(int cookie, Exception ex) {
            synchronized (mOperations) {
                final Operation operation = getOperationLocked(cookie);
                if (operation != null) {
                    operation.mException = ex;
                }
            }
        }

        public void endOperation(int cookie) {
            synchronized (mOperations) {
                if (endOperationDeferLogLocked(cookie)) {
                    logOperationLocked(cookie, null);
                }
            }
        }

        public boolean endOperationDeferLog(int cookie) {
            synchronized (mOperations) {
                return endOperationDeferLogLocked(cookie);
            }
        }

        public void logOperation(int cookie, String detail) {
            synchronized (mOperations) {
                logOperationLocked(cookie, detail);
            }
        }

        private boolean endOperationDeferLogLocked(int cookie) {
            final Operation operation = getOperationLocked(cookie);
            if (operation != null) {
                operation.mEndTime = System.currentTimeMillis();
                operation.mFinished = true;
                return SQLiteDebug.DEBUG_LOG_SLOW_QUERIES && SQLiteDebug.shouldLogSlowQuery(
                                operation.mEndTime - operation.mStartTime);
            }
            return false;
        }

        private void logOperationLocked(int cookie, String detail) {
            final Operation operation = getOperationLocked(cookie);
            StringBuilder msg = new StringBuilder();
            operation.describe(msg, false);
            if (detail != null) {
                msg.append(", ").append(detail);
            }
            Log.d(TAG, msg.toString());
        }

        private int newOperationCookieLocked(int index) {
            final int generation = mGeneration++;
            return generation << COOKIE_GENERATION_SHIFT | index;
        }

        private Operation getOperationLocked(int cookie) {
            final int index = cookie & COOKIE_INDEX_MASK;
            final Operation operation = mOperations[index];
            return operation.mCookie == cookie ? operation : null;
        }

        public String describeCurrentOperation() {
            synchronized (mOperations) {
                final Operation operation = mOperations[mIndex];
                if (operation != null && !operation.mFinished) {
                    StringBuilder msg = new StringBuilder();
                    operation.describe(msg, false);
                    return msg.toString();
                }
                return null;
            }
        }

        public void dump(Printer printer, boolean verbose) {
            synchronized (mOperations) {
                printer.println("  Most recently executed operations:");
                int index = mIndex;
                Operation operation = mOperations[index];
                if (operation != null) {
                    int n = 0;
                    do {
                        StringBuilder msg = new StringBuilder();
                        msg.append("    ").append(n).append(": [");
                        msg.append(operation.getFormattedStartTime());
                        msg.append("] ");
                        operation.describe(msg, verbose);
                        printer.println(msg.toString());

                        if (index > 0) {
                            index -= 1;
                        } else {
                            index = MAX_RECENT_OPERATIONS - 1;
                        }
                        n += 1;
                        operation = mOperations[index];
                    } while (operation != null && n < MAX_RECENT_OPERATIONS);
                } else {
                    printer.println("    <none>");
                }
            }
        }
    }

    private static final class Operation {
        private static final SimpleDateFormat sDateFormat =
                new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");

        public long mStartTime;
        public long mEndTime;
        public String mKind;
        public String mSql;
        public ArrayList<Object> mBindArgs;
        public boolean mFinished;
        public Exception mException;
        public int mCookie;

        public void describe(StringBuilder msg, boolean verbose) {
            msg.append(mKind);
            if (mFinished) {
                msg.append(" took ").append(mEndTime - mStartTime).append("ms");
            } else {
                msg.append(" started ").append(System.currentTimeMillis() - mStartTime)
                        .append("ms ago");
            }
            msg.append(" - ").append(getStatus());
            if (mSql != null) {
                msg.append(", sql=\"").append(trimSqlForDisplay(mSql)).append("\"");
            }
            if (verbose && mBindArgs != null && mBindArgs.size() != 0) {
                msg.append(", bindArgs=[");
                final int count = mBindArgs.size();
                for (int i = 0; i < count; i++) {
                    final Object arg = mBindArgs.get(i);
                    if (i != 0) {
                        msg.append(", ");
                    }
                    if (arg == null) {
                        msg.append("null");
                    } else if (arg instanceof byte[]) {
                        msg.append("<byte[]>");
                    } else if (arg instanceof String) {
                        msg.append("\"").append((String)arg).append("\"");
                    } else {
                        msg.append(arg);
                    }
                }
                msg.append("]");
            }
            if (mException != null) {
                msg.append(", exception=\"").append(mException.getMessage()).append("\"");
            }
        }

        private String getStatus() {
            if (!mFinished) {
                return "running";
            }
            return mException != null ? "failed" : "succeeded";
        }

        private String getFormattedStartTime() {
            return sDateFormat.format(new Date(mStartTime));
        }
    }
}






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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import org.sqlite.database.sqlite.CloseGuard;

import org.sqlite.database.sqlite.SQLiteDebug.DbStats;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.os.SystemClock;
import android.util.Log;
/* import android.util.PrefixPrinter; */
import android.util.Printer;

import java.io.Closeable;
import java.util.ArrayList;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.LockSupport;

/**
 * Maintains a pool of active SQLite database connections.
 * <p>
 * At any given time, a connection is either owned by the pool, or it has been
 * acquired by a {@link SQLiteSession}.  When the {@link SQLiteSession} is
 * finished with the connection it is using, it must return the connection
 * back to the pool.
 * </p><p>
 * The pool holds strong references to the connections it owns.  However,
 * it only holds <em>weak references</em> to the connections that sessions
 * have acquired from it.  Using weak references in the latter case ensures
 * that the connection pool can detect when connections have been improperly
 * abandoned so that it can create new connections to replace them if needed.
 * </p><p>
 * The connection pool is thread-safe (but the connections themselves are not).
 * </p>
 *
 * <h2>Exception safety</h2>
 * <p>
 * This code attempts to maintain the invariant that opened connections are
 * always owned.  Unfortunately that means it needs to handle exceptions
 * all over to ensure that broken connections get cleaned up.  Most
 * operations invokving SQLite can throw {@link SQLiteException} or other
 * runtime exceptions.  This is a bit of a pain to deal with because the compiler
 * cannot help us catch missing exception handling code.
 * </p><p>
 * The general rule for this file: If we are making calls out to
 * {@link SQLiteConnection} then we must be prepared to handle any
 * runtime exceptions it might throw at us.  Note that out-of-memory
 * is an {@link Error}, not a {@link RuntimeException}.  We don't trouble ourselves
 * handling out of memory because it is hard to do anything at all sensible then
 * and most likely the VM is about to crash.
 * </p>
 *
 * @hide
 */
public final class SQLiteConnectionPool implements Closeable {
    private static final String TAG = "SQLiteConnectionPool";

    // Amount of time to wait in milliseconds before unblocking acquireConnection
    // and logging a message about the connection pool being busy.
    private static final long CONNECTION_POOL_BUSY_MILLIS = 30 * 1000; // 30 seconds

    private final CloseGuard mCloseGuard = CloseGuard.get();

    private final Object mLock = new Object();
    private final AtomicBoolean mConnectionLeaked = new AtomicBoolean();
    private final SQLiteDatabaseConfiguration mConfiguration;
    private int mMaxConnectionPoolSize;
    private boolean mIsOpen;
    private int mNextConnectionId;

    private ConnectionWaiter mConnectionWaiterPool;
    private ConnectionWaiter mConnectionWaiterQueue;

    // Strong references to all available connections.
    private final ArrayList<SQLiteConnection> mAvailableNonPrimaryConnections =
            new ArrayList<SQLiteConnection>();
    private SQLiteConnection mAvailablePrimaryConnection;

    // Describes what should happen to an acquired connection when it is returned to the pool.
    enum AcquiredConnectionStatus {
        // The connection should be returned to the pool as usual.
        NORMAL,

        // The connection must be reconfigured before being returned.
        RECONFIGURE,

        // The connection must be closed and discarded.
        DISCARD,
    }

    // Weak references to all acquired connections.  The associated value
    // indicates whether the connection must be reconfigured before being
    // returned to the available connection list or discarded.
    // For example, the prepared statement cache size may have changed and
    // need to be updated in preparation for the next client.
    private final WeakHashMap<SQLiteConnection, AcquiredConnectionStatus> mAcquiredConnections =
            new WeakHashMap<SQLiteConnection, AcquiredConnectionStatus>();

    /**
     * Connection flag: Read-only.
     * <p>
     * This flag indicates that the connection will only be used to
     * perform read-only operations.
     * </p>
     */
    public static final int CONNECTION_FLAG_READ_ONLY = 1 << 0;

    /**
     * Connection flag: Primary connection affinity.
     * <p>
     * This flag indicates that the primary connection is required.
     * This flag helps support legacy applications that expect most data modifying
     * operations to be serialized by locking the primary database connection.
     * Setting this flag essentially implements the old "db lock" concept by preventing
     * an operation from being performed until it can obtain exclusive access to
     * the primary connection.
     * </p>
     */
    public static final int CONNECTION_FLAG_PRIMARY_CONNECTION_AFFINITY = 1 << 1;

    /**
     * Connection flag: Connection is being used interactively.
     * <p>
     * This flag indicates that the connection is needed by the UI thread.
     * The connection pool can use this flag to elevate the priority
     * of the database connection request.
     * </p>
     */
    public static final int CONNECTION_FLAG_INTERACTIVE = 1 << 2;

    private SQLiteConnectionPool(SQLiteDatabaseConfiguration configuration) {
        mConfiguration = new SQLiteDatabaseConfiguration(configuration);
        setMaxConnectionPoolSizeLocked();
    }

    @Override
    protected void finalize() throws Throwable {
        try {
            dispose(true);
        } finally {
            super.finalize();
        }
    }

    /**
     * Opens a connection pool for the specified database.
     *
     * @param configuration The database configuration.
     * @return The connection pool.
     *
     * @throws SQLiteException if a database error occurs.
     */
    public static SQLiteConnectionPool open(SQLiteDatabaseConfiguration configuration) {
        if (configuration == null) {
            throw new IllegalArgumentException("configuration must not be null.");
        }

        // Create the pool.
        SQLiteConnectionPool pool = new SQLiteConnectionPool(configuration);
        pool.open(); // might throw
        return pool;
    }

    // Might throw
    private void open() {
        // Open the primary connection.
        // This might throw if the database is corrupt.
        mAvailablePrimaryConnection = openConnectionLocked(mConfiguration,
                true /*primaryConnection*/); // might throw

        // Mark the pool as being open for business.
        mIsOpen = true;
        mCloseGuard.open("close");
    }

    /**
     * Closes the connection pool.
     * <p>
     * When the connection pool is closed, it will refuse all further requests
     * to acquire connections.  All connections that are currently available in
     * the pool are closed immediately.  Any connections that are still in use
     * will be closed as soon as they are returned to the pool.
     * </p>
     *
     * @throws IllegalStateException if the pool has been closed.
     */
    public void close() {
        dispose(false);
    }

    private void dispose(boolean finalized) {
        if (mCloseGuard != null) {
            if (finalized) {
                mCloseGuard.warnIfOpen();
            }
            mCloseGuard.close();
        }

        if (!finalized) {
            // Close all connections.  We don't need (or want) to do this
            // when finalized because we don't know what state the connections
            // themselves will be in.  The finalizer is really just here for CloseGuard.
            // The connections will take care of themselves when their own finalizers run.
            synchronized (mLock) {
                throwIfClosedLocked();

                mIsOpen = false;

                closeAvailableConnectionsAndLogExceptionsLocked();

                final int pendingCount = mAcquiredConnections.size();
                if (pendingCount != 0) {
                    Log.i(TAG, "The connection pool for " + mConfiguration.label
                            + " has been closed but there are still "
                            + pendingCount + " connections in use.  They will be closed "
                            + "as they are released back to the pool.");
                }

                wakeConnectionWaitersLocked();
            }
        }
    }

    /**
     * Reconfigures the database configuration of the connection pool and all of its
     * connections.
     * <p>
     * Configuration changes are propagated down to connections immediately if
     * they are available or as soon as they are released.  This includes changes
     * that affect the size of the pool.
     * </p>
     *
     * @param configuration The new configuration.
     *
     * @throws IllegalStateException if the pool has been closed.
     */
    public void reconfigure(SQLiteDatabaseConfiguration configuration) {
        if (configuration == null) {
            throw new IllegalArgumentException("configuration must not be null.");
        }

        synchronized (mLock) {
            throwIfClosedLocked();

            boolean walModeChanged = ((configuration.openFlags ^ mConfiguration.openFlags)
                    & SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING) != 0;
            if (walModeChanged) {
                // WAL mode can only be changed if there are no acquired connections
                // because we need to close all but the primary connection first.
                if (!mAcquiredConnections.isEmpty()) {
                    throw new IllegalStateException("Write Ahead Logging (WAL) mode cannot "
                            + "be enabled or disabled while there are transactions in "
                            + "progress.  Finish all transactions and release all active "
                            + "database connections first.");
                }

                // Close all non-primary connections.  This should happen immediately
                // because none of them are in use.
                closeAvailableNonPrimaryConnectionsAndLogExceptionsLocked();
                assert mAvailableNonPrimaryConnections.isEmpty();
            }

            boolean foreignKeyModeChanged = configuration.foreignKeyConstraintsEnabled
                    != mConfiguration.foreignKeyConstraintsEnabled;
            if (foreignKeyModeChanged) {
                // Foreign key constraints can only be changed if there are no transactions
                // in progress.  To make this clear, we throw an exception if there are
                // any acquired connections.
                if (!mAcquiredConnections.isEmpty()) {
                    throw new IllegalStateException("Foreign Key Constraints cannot "
                            + "be enabled or disabled while there are transactions in "
                            + "progress.  Finish all transactions and release all active "
                            + "database connections first.");
                }
            }

            if (mConfiguration.openFlags != configuration.openFlags) {
                // If we are changing open flags and WAL mode at the same time, then
                // we have no choice but to close the primary connection beforehand
                // because there can only be one connection open when we change WAL mode.
                if (walModeChanged) {
                    closeAvailableConnectionsAndLogExceptionsLocked();
                }

                // Try to reopen the primary connection using the new open flags then
                // close and discard all existing connections.
                // This might throw if the database is corrupt or cannot be opened in
                // the new mode in which case existing connections will remain untouched.
                SQLiteConnection newPrimaryConnection = openConnectionLocked(configuration,
                        true /*primaryConnection*/); // might throw

                closeAvailableConnectionsAndLogExceptionsLocked();
                discardAcquiredConnectionsLocked();

                mAvailablePrimaryConnection = newPrimaryConnection;
                mConfiguration.updateParametersFrom(configuration);
                setMaxConnectionPoolSizeLocked();
            } else {
                // Reconfigure the database connections in place.
                mConfiguration.updateParametersFrom(configuration);
                setMaxConnectionPoolSizeLocked();

                closeExcessConnectionsAndLogExceptionsLocked();
                reconfigureAllConnectionsLocked();
            }

            wakeConnectionWaitersLocked();
        }
    }

    /**
     * Acquires a connection from the pool.
     * <p>
     * The caller must call {@link #releaseConnection} to release the connection
     * back to the pool when it is finished.  Failure to do so will result
     * in much unpleasantness.
     * </p>
     *
     * @param sql If not null, try to find a connection that already has
     * the specified SQL statement in its prepared statement cache.
     * @param connectionFlags The connection request flags.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The connection that was acquired, never null.
     *
     * @throws IllegalStateException if the pool has been closed.
     * @throws SQLiteException if a database error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public SQLiteConnection acquireConnection(String sql, int connectionFlags,
            CancellationSignal cancellationSignal) {
        return waitForConnection(sql, connectionFlags, cancellationSignal);
    }

    /**
     * Releases a connection back to the pool.
     * <p>
     * It is ok to call this method after the pool has closed, to release
     * connections that were still in use at the time of closure.
     * </p>
     *
     * @param connection The connection to release.  Must not be null.
     *
     * @throws IllegalStateException if the connection was not acquired
     * from this pool or if it has already been released.
     */
    public void releaseConnection(SQLiteConnection connection) {
        synchronized (mLock) {
            AcquiredConnectionStatus status = mAcquiredConnections.remove(connection);
            if (status == null) {
                throw new IllegalStateException("Cannot perform this operation "
                        + "because the specified connection was not acquired "
                        + "from this pool or has already been released.");
            }

            if (!mIsOpen) {
                closeConnectionAndLogExceptionsLocked(connection);
            } else if (connection.isPrimaryConnection()) {
                if (recycleConnectionLocked(connection, status)) {
                    assert mAvailablePrimaryConnection == null;
                    mAvailablePrimaryConnection = connection;
                }
                wakeConnectionWaitersLocked();
            } else if (mAvailableNonPrimaryConnections.size() >= mMaxConnectionPoolSize - 1) {
                closeConnectionAndLogExceptionsLocked(connection);
            } else {
                if (recycleConnectionLocked(connection, status)) {
                    mAvailableNonPrimaryConnections.add(connection);
                }
                wakeConnectionWaitersLocked();
            }
        }
    }

    // Can't throw.
    private boolean recycleConnectionLocked(SQLiteConnection connection,
            AcquiredConnectionStatus status) {
        if (status == AcquiredConnectionStatus.RECONFIGURE) {
            try {
                connection.reconfigure(mConfiguration); // might throw
            } catch (RuntimeException ex) {
                Log.e(TAG, "Failed to reconfigure released connection, closing it: "
                        + connection, ex);
                status = AcquiredConnectionStatus.DISCARD;
            }
        }
        if (status == AcquiredConnectionStatus.DISCARD) {
            closeConnectionAndLogExceptionsLocked(connection);
            return false;
        }
        return true;
    }

    /**
     * Returns true if the session should yield the connection due to
     * contention over available database connections.
     *
     * @param connection The connection owned by the session.
     * @param connectionFlags The connection request flags.
     * @return True if the session should yield its connection.
     *
     * @throws IllegalStateException if the connection was not acquired
     * from this pool or if it has already been released.
     */
    public boolean shouldYieldConnection(SQLiteConnection connection, int connectionFlags) {
        synchronized (mLock) {
            if (!mAcquiredConnections.containsKey(connection)) {
                throw new IllegalStateException("Cannot perform this operation "
                        + "because the specified connection was not acquired "
                        + "from this pool or has already been released.");
            }

            if (!mIsOpen) {
                return false;
            }

            return isSessionBlockingImportantConnectionWaitersLocked(
                    connection.isPrimaryConnection(), connectionFlags);
        }
    }

    /**
     * Collects statistics about database connection memory usage.
     *
     * @param dbStatsList The list to populate.
     */
    public void collectDbStats(ArrayList<DbStats> dbStatsList) {
        synchronized (mLock) {
            if (mAvailablePrimaryConnection != null) {
                mAvailablePrimaryConnection.collectDbStats(dbStatsList);
            }

            for (SQLiteConnection connection : mAvailableNonPrimaryConnections) {
                connection.collectDbStats(dbStatsList);
            }

            for (SQLiteConnection connection : mAcquiredConnections.keySet()) {
                connection.collectDbStatsUnsafe(dbStatsList);
            }
        }
    }

    // Might throw.
    private SQLiteConnection openConnectionLocked(SQLiteDatabaseConfiguration configuration,
            boolean primaryConnection) {
        final int connectionId = mNextConnectionId++;
        return SQLiteConnection.open(this, configuration,
                connectionId, primaryConnection); // might throw
    }

    void onConnectionLeaked() {
        // This code is running inside of the SQLiteConnection finalizer.
        //
        // We don't know whether it is just the connection that has been finalized (and leaked)
        // or whether the connection pool has also been or is about to be finalized.
        // Consequently, it would be a bad idea to try to grab any locks or to
        // do any significant work here.  So we do the simplest possible thing and
        // set a flag.  waitForConnection() periodically checks this flag (when it
        // times out) so that it can recover from leaked connections and wake
        // itself or other threads up if necessary.
        //
        // You might still wonder why we don't try to do more to wake up the waiters
        // immediately.  First, as explained above, it would be hard to do safely
        // unless we started an extra Thread to function as a reference queue.  Second,
        // this is never supposed to happen in normal operation.  Third, there is no
        // guarantee that the GC will actually detect the leak in a timely manner so
        // it's not all that important that we recover from the leak in a timely manner
        // either.  Fourth, if a badly behaved application finds itself hung waiting for
        // several seconds while waiting for a leaked connection to be detected and recreated,
        // then perhaps its authors will have added incentive to fix the problem!

        Log.w(TAG, "A SQLiteConnection object for database '"
                + mConfiguration.label + "' was leaked!  Please fix your application "
                + "to end transactions in progress properly and to close the database "
                + "when it is no longer needed.");

        mConnectionLeaked.set(true);
    }

    // Can't throw.
    private void closeAvailableConnectionsAndLogExceptionsLocked() {
        closeAvailableNonPrimaryConnectionsAndLogExceptionsLocked();

        if (mAvailablePrimaryConnection != null) {
            closeConnectionAndLogExceptionsLocked(mAvailablePrimaryConnection);
            mAvailablePrimaryConnection = null;
        }
    }

    // Can't throw.
    private void closeAvailableNonPrimaryConnectionsAndLogExceptionsLocked() {
        final int count = mAvailableNonPrimaryConnections.size();
        for (int i = 0; i < count; i++) {
            closeConnectionAndLogExceptionsLocked(mAvailableNonPrimaryConnections.get(i));
        }
        mAvailableNonPrimaryConnections.clear();
    }

    // Can't throw.
    private void closeExcessConnectionsAndLogExceptionsLocked() {
        int availableCount = mAvailableNonPrimaryConnections.size();
        while (availableCount-- > mMaxConnectionPoolSize - 1) {
            SQLiteConnection connection =
                    mAvailableNonPrimaryConnections.remove(availableCount);
            closeConnectionAndLogExceptionsLocked(connection);
        }
    }

    // Can't throw.
    private void closeConnectionAndLogExceptionsLocked(SQLiteConnection connection) {
        try {
            connection.close(); // might throw
        } catch (RuntimeException ex) {
            Log.e(TAG, "Failed to close connection, its fate is now in the hands "
                    + "of the merciful GC: " + connection, ex);
        }
    }

    // Can't throw.
    private void discardAcquiredConnectionsLocked() {
        markAcquiredConnectionsLocked(AcquiredConnectionStatus.DISCARD);
    }

    // Can't throw.
    private void reconfigureAllConnectionsLocked() {
        if (mAvailablePrimaryConnection != null) {
            try {
                mAvailablePrimaryConnection.reconfigure(mConfiguration); // might throw
            } catch (RuntimeException ex) {
                Log.e(TAG, "Failed to reconfigure available primary connection, closing it: "
                        + mAvailablePrimaryConnection, ex);
                closeConnectionAndLogExceptionsLocked(mAvailablePrimaryConnection);
                mAvailablePrimaryConnection = null;
            }
        }

        int count = mAvailableNonPrimaryConnections.size();
        for (int i = 0; i < count; i++) {
            final SQLiteConnection connection = mAvailableNonPrimaryConnections.get(i);
            try {
                connection.reconfigure(mConfiguration); // might throw
            } catch (RuntimeException ex) {
                Log.e(TAG, "Failed to reconfigure available non-primary connection, closing it: "
                        + connection, ex);
                closeConnectionAndLogExceptionsLocked(connection);
                mAvailableNonPrimaryConnections.remove(i--);
                count -= 1;
            }
        }

        markAcquiredConnectionsLocked(AcquiredConnectionStatus.RECONFIGURE);
    }

    // Can't throw.
    private void markAcquiredConnectionsLocked(AcquiredConnectionStatus status) {
        if (!mAcquiredConnections.isEmpty()) {
            ArrayList<SQLiteConnection> keysToUpdate = new ArrayList<SQLiteConnection>(
                    mAcquiredConnections.size());
            for (Map.Entry<SQLiteConnection, AcquiredConnectionStatus> entry
                    : mAcquiredConnections.entrySet()) {
                AcquiredConnectionStatus oldStatus = entry.getValue();
                if (status != oldStatus
                        && oldStatus != AcquiredConnectionStatus.DISCARD) {
                    keysToUpdate.add(entry.getKey());
                }
            }
            final int updateCount = keysToUpdate.size();
            for (int i = 0; i < updateCount; i++) {
                mAcquiredConnections.put(keysToUpdate.get(i), status);
            }
        }
    }

    // Might throw.
    private SQLiteConnection waitForConnection(String sql, int connectionFlags,
            CancellationSignal cancellationSignal) {
        final boolean wantPrimaryConnection =
                (connectionFlags & CONNECTION_FLAG_PRIMARY_CONNECTION_AFFINITY) != 0;

        final ConnectionWaiter waiter;
        final int nonce;
        synchronized (mLock) {
            throwIfClosedLocked();

            // Abort if canceled.
            if (cancellationSignal != null) {
                cancellationSignal.throwIfCanceled();
            }

            // Try to acquire a connection.
            SQLiteConnection connection = null;
            if (!wantPrimaryConnection) {
                connection = tryAcquireNonPrimaryConnectionLocked(
                        sql, connectionFlags); // might throw
            }
            if (connection == null) {
                connection = tryAcquirePrimaryConnectionLocked(connectionFlags); // might throw
            }
            if (connection != null) {
                return connection;
            }

            // No connections available.  Enqueue a waiter in priority order.
            final int priority = getPriority(connectionFlags);
            final long startTime = SystemClock.uptimeMillis();
            waiter = obtainConnectionWaiterLocked(Thread.currentThread(), startTime,
                    priority, wantPrimaryConnection, sql, connectionFlags);
            ConnectionWaiter predecessor = null;
            ConnectionWaiter successor = mConnectionWaiterQueue;
            while (successor != null) {
                if (priority > successor.mPriority) {
                    waiter.mNext = successor;
                    break;
                }
                predecessor = successor;
                successor = successor.mNext;
            }
            if (predecessor != null) {
                predecessor.mNext = waiter;
            } else {
                mConnectionWaiterQueue = waiter;
            }

            nonce = waiter.mNonce;
        }

        // Set up the cancellation listener.
        if (cancellationSignal != null) {
            cancellationSignal.setOnCancelListener(new CancellationSignal.OnCancelListener() {
                @Override
                public void onCancel() {
                    synchronized (mLock) {
                        if (waiter.mNonce == nonce) {
                            cancelConnectionWaiterLocked(waiter);
                        }
                    }
                }
            });
        }
        try {
            // Park the thread until a connection is assigned or the pool is closed.
            // Rethrow an exception from the wait, if we got one.
            long busyTimeoutMillis = CONNECTION_POOL_BUSY_MILLIS;
            long nextBusyTimeoutTime = waiter.mStartTime + busyTimeoutMillis;
            for (;;) {
                // Detect and recover from connection leaks.
                if (mConnectionLeaked.compareAndSet(true, false)) {
                    synchronized (mLock) {
                        wakeConnectionWaitersLocked();
                    }
                }

                // Wait to be unparked (may already have happened), a timeout, or interruption.
                LockSupport.parkNanos(this, busyTimeoutMillis * 1000000L);

                // Clear the interrupted flag, just in case.
                Thread.interrupted();

                // Check whether we are done waiting yet.
                synchronized (mLock) {
                    throwIfClosedLocked();

                    final SQLiteConnection connection = waiter.mAssignedConnection;
                    final RuntimeException ex = waiter.mException;
                    if (connection != null || ex != null) {
                        recycleConnectionWaiterLocked(waiter);
                        if (connection != null) {
                            return connection;
                        }
                        throw ex; // rethrow!
                    }

                    final long now = SystemClock.uptimeMillis();
                    if (now < nextBusyTimeoutTime) {
                        busyTimeoutMillis = now - nextBusyTimeoutTime;
                    } else {
                        logConnectionPoolBusyLocked(now - waiter.mStartTime, connectionFlags);
                        busyTimeoutMillis = CONNECTION_POOL_BUSY_MILLIS;
                        nextBusyTimeoutTime = now + busyTimeoutMillis;
                    }
                }
            }
        } finally {
            // Remove the cancellation listener.
            if (cancellationSignal != null) {
                cancellationSignal.setOnCancelListener(null);
            }
        }
    }

    // Can't throw.
    private void cancelConnectionWaiterLocked(ConnectionWaiter waiter) {
        if (waiter.mAssignedConnection != null || waiter.mException != null) {
            // Waiter is done waiting but has not woken up yet.
            return;
        }

        // Waiter must still be waiting.  Dequeue it.
        ConnectionWaiter predecessor = null;
        ConnectionWaiter current = mConnectionWaiterQueue;
        while (current != waiter) {
            assert current != null;
            predecessor = current;
            current = current.mNext;
        }
        if (predecessor != null) {
            predecessor.mNext = waiter.mNext;
        } else {
            mConnectionWaiterQueue = waiter.mNext;
        }

        // Send the waiter an exception and unpark it.
        waiter.mException = new OperationCanceledException();
        LockSupport.unpark(waiter.mThread);

        // Check whether removing this waiter will enable other waiters to make progress.
        wakeConnectionWaitersLocked();
    }

    // Can't throw.
    private void logConnectionPoolBusyLocked(long waitMillis, int connectionFlags) {
        final Thread thread = Thread.currentThread();
        StringBuilder msg = new StringBuilder();
        msg.append("The connection pool for database '").append(mConfiguration.label);
        msg.append("' has been unable to grant a connection to thread ");
        msg.append(thread.getId()).append(" (").append(thread.getName()).append(") ");
        msg.append("with flags 0x").append(Integer.toHexString(connectionFlags));
        msg.append(" for ").append(waitMillis * 0.001f).append(" seconds.\n");

        ArrayList<String> requests = new ArrayList<String>();
        int activeConnections = 0;
        int idleConnections = 0;
        if (!mAcquiredConnections.isEmpty()) {
            for (SQLiteConnection connection : mAcquiredConnections.keySet()) {
                String description = connection.describeCurrentOperationUnsafe();
                if (description != null) {
                    requests.add(description);
                    activeConnections += 1;
                } else {
                    idleConnections += 1;
                }
            }
        }
        int availableConnections = mAvailableNonPrimaryConnections.size();
        if (mAvailablePrimaryConnection != null) {
            availableConnections += 1;
        }

        msg.append("Connections: ").append(activeConnections).append(" active, ");
        msg.append(idleConnections).append(" idle, ");
        msg.append(availableConnections).append(" available.\n");

        if (!requests.isEmpty()) {
            msg.append("\nRequests in progress:\n");
            for (String request : requests) {
                msg.append("  ").append(request).append("\n");
            }
        }

        Log.w(TAG, msg.toString());
    }

    // Can't throw.
    private void wakeConnectionWaitersLocked() {
        // Unpark all waiters that have requests that we can fulfill.
        // This method is designed to not throw runtime exceptions, although we might send
        // a waiter an exception for it to rethrow.
        ConnectionWaiter predecessor = null;
        ConnectionWaiter waiter = mConnectionWaiterQueue;
        boolean primaryConnectionNotAvailable = false;
        boolean nonPrimaryConnectionNotAvailable = false;
        while (waiter != null) {
            boolean unpark = false;
            if (!mIsOpen) {
                unpark = true;
            } else {
                try {
                    SQLiteConnection connection = null;
                    if (!waiter.mWantPrimaryConnection && !nonPrimaryConnectionNotAvailable) {
                        connection = tryAcquireNonPrimaryConnectionLocked(
                                waiter.mSql, waiter.mConnectionFlags); // might throw
                        if (connection == null) {
                            nonPrimaryConnectionNotAvailable = true;
                        }
                    }
                    if (connection == null && !primaryConnectionNotAvailable) {
                        connection = tryAcquirePrimaryConnectionLocked(
                                waiter.mConnectionFlags); // might throw
                        if (connection == null) {
                            primaryConnectionNotAvailable = true;
                        }
                    }
                    if (connection != null) {
                        waiter.mAssignedConnection = connection;
                        unpark = true;
                    } else if (nonPrimaryConnectionNotAvailable && primaryConnectionNotAvailable) {
                        // There are no connections available and the pool is still open.
                        // We cannot fulfill any more connection requests, so stop here.
                        break;
                    }
                } catch (RuntimeException ex) {
                    // Let the waiter handle the exception from acquiring a connection.
                    waiter.mException = ex;
                    unpark = true;
                }
            }

            final ConnectionWaiter successor = waiter.mNext;
            if (unpark) {
                if (predecessor != null) {
                    predecessor.mNext = successor;
                } else {
                    mConnectionWaiterQueue = successor;
                }
                waiter.mNext = null;

                LockSupport.unpark(waiter.mThread);
            } else {
                predecessor = waiter;
            }
            waiter = successor;
        }
    }

    // Might throw.
    private SQLiteConnection tryAcquirePrimaryConnectionLocked(int connectionFlags) {
        // If the primary connection is available, acquire it now.
        SQLiteConnection connection = mAvailablePrimaryConnection;
        if (connection != null) {
            mAvailablePrimaryConnection = null;
            finishAcquireConnectionLocked(connection, connectionFlags); // might throw
            return connection;
        }

        // Make sure that the primary connection actually exists and has just been acquired.
        for (SQLiteConnection acquiredConnection : mAcquiredConnections.keySet()) {
            if (acquiredConnection.isPrimaryConnection()) {
                return null;
            }
        }

        // Uhoh.  No primary connection!  Either this is the first time we asked
        // for it, or maybe it leaked?
        connection = openConnectionLocked(mConfiguration,
                true /*primaryConnection*/); // might throw
        finishAcquireConnectionLocked(connection, connectionFlags); // might throw
        return connection;
    }

    // Might throw.
    private SQLiteConnection tryAcquireNonPrimaryConnectionLocked(
            String sql, int connectionFlags) {
        // Try to acquire the next connection in the queue.
        SQLiteConnection connection;
        final int availableCount = mAvailableNonPrimaryConnections.size();
        if (availableCount > 1 && sql != null) {
            // If we have a choice, then prefer a connection that has the
            // prepared statement in its cache.
            for (int i = 0; i < availableCount; i++) {
                connection = mAvailableNonPrimaryConnections.get(i);
                if (connection.isPreparedStatementInCache(sql)) {
                    mAvailableNonPrimaryConnections.remove(i);
                    finishAcquireConnectionLocked(connection, connectionFlags); // might throw
                    return connection;
                }
            }
        }
        if (availableCount > 0) {
            // Otherwise, just grab the next one.
            connection = mAvailableNonPrimaryConnections.remove(availableCount - 1);
            finishAcquireConnectionLocked(connection, connectionFlags); // might throw
            return connection;
        }

        // Expand the pool if needed.
        int openConnections = mAcquiredConnections.size();
        if (mAvailablePrimaryConnection != null) {
            openConnections += 1;
        }
        if (openConnections >= mMaxConnectionPoolSize) {
            return null;
        }
        connection = openConnectionLocked(mConfiguration,
                false /*primaryConnection*/); // might throw
        finishAcquireConnectionLocked(connection, connectionFlags); // might throw
        return connection;
    }

    // Might throw.
    private void finishAcquireConnectionLocked(SQLiteConnection connection, int connectionFlags) {
        try {
            final boolean readOnly = (connectionFlags & CONNECTION_FLAG_READ_ONLY) != 0;
            connection.setOnlyAllowReadOnlyOperations(readOnly);

            mAcquiredConnections.put(connection, AcquiredConnectionStatus.NORMAL);
        } catch (RuntimeException ex) {
            Log.e(TAG, "Failed to prepare acquired connection for session, closing it: "
                    + connection +", connectionFlags=" + connectionFlags);
            closeConnectionAndLogExceptionsLocked(connection);
            throw ex; // rethrow!
        }
    }

    private boolean isSessionBlockingImportantConnectionWaitersLocked(
            boolean holdingPrimaryConnection, int connectionFlags) {
        ConnectionWaiter waiter = mConnectionWaiterQueue;
        if (waiter != null) {
            final int priority = getPriority(connectionFlags);
            do {
                // Only worry about blocked connections that have same or lower priority.
                if (priority > waiter.mPriority) {
                    break;
                }

                // If we are holding the primary connection then we are blocking the waiter.
                // Likewise, if we are holding a non-primary connection and the waiter
                // would accept a non-primary connection, then we are blocking the waier.
                if (holdingPrimaryConnection || !waiter.mWantPrimaryConnection) {
                    return true;
                }

                waiter = waiter.mNext;
            } while (waiter != null);
        }
        return false;
    }

    private static int getPriority(int connectionFlags) {
        return (connectionFlags & CONNECTION_FLAG_INTERACTIVE) != 0 ? 1 : 0;
    }

    private void setMaxConnectionPoolSizeLocked() {
        if( !SQLiteDatabase.hasCodec()
	 && (mConfiguration.openFlags & SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING) != 0
	) {
            mMaxConnectionPoolSize = SQLiteGlobal.getWALConnectionPoolSize();
        } else {
            // TODO: We don't actually need to restrict the connection pool size to 1
            // for non-WAL databases.  There might be reasons to use connection pooling
            // with other journal modes.  For now, enabling connection pooling and
            // using WAL are the same thing in the API.
            mMaxConnectionPoolSize = 1;
        }
    }

    private void throwIfClosedLocked() {
        if (!mIsOpen) {
            throw new IllegalStateException("Cannot perform this operation "
                    + "because the connection pool has been closed.");
        }
    }

    private ConnectionWaiter obtainConnectionWaiterLocked(Thread thread, long startTime,
            int priority, boolean wantPrimaryConnection, String sql, int connectionFlags) {
        ConnectionWaiter waiter = mConnectionWaiterPool;
        if (waiter != null) {
            mConnectionWaiterPool = waiter.mNext;
            waiter.mNext = null;
        } else {
            waiter = new ConnectionWaiter();
        }
        waiter.mThread = thread;
        waiter.mStartTime = startTime;
        waiter.mPriority = priority;
        waiter.mWantPrimaryConnection = wantPrimaryConnection;
        waiter.mSql = sql;
        waiter.mConnectionFlags = connectionFlags;
        return waiter;
    }

    private void recycleConnectionWaiterLocked(ConnectionWaiter waiter) {
        waiter.mNext = mConnectionWaiterPool;
        waiter.mThread = null;
        waiter.mSql = null;
        waiter.mAssignedConnection = null;
        waiter.mException = null;
        waiter.mNonce += 1;
        mConnectionWaiterPool = waiter;
    }

    public void enableLocalizedCollators() {
      synchronized (mLock) {
	if( !mAcquiredConnections.isEmpty() || mAvailablePrimaryConnection==null ) {
	  throw new IllegalStateException(
	      "Cannot enable localized collators while database is in use"
	  );
	}
	mAvailablePrimaryConnection.enableLocalizedCollators();
      }
    }

    /**
     * Dumps debugging information about this connection pool.
     *
     * @param printer The printer to receive the dump, not null.
     * @param verbose True to dump more verbose information.
     */
    public void dump(Printer printer, boolean verbose) {
      /*
        Printer indentedPrinter = Printer.create(printer, "    ");
        synchronized (mLock) {
            printer.println("Connection pool for " + mConfiguration.path + ":");
            printer.println("  Open: " + mIsOpen);
            printer.println("  Max connections: " + mMaxConnectionPoolSize);

            printer.println("  Available primary connection:");
            if (mAvailablePrimaryConnection != null) {
                mAvailablePrimaryConnection.dump(indentedPrinter, verbose);
            } else {
                indentedPrinter.println("<none>");
            }

            printer.println("  Available non-primary connections:");
            if (!mAvailableNonPrimaryConnections.isEmpty()) {
                final int count = mAvailableNonPrimaryConnections.size();
                for (int i = 0; i < count; i++) {
                    mAvailableNonPrimaryConnections.get(i).dump(indentedPrinter, verbose);
                }
            } else {
                indentedPrinter.println("<none>");
            }

            printer.println("  Acquired connections:");
            if (!mAcquiredConnections.isEmpty()) {
                for (Map.Entry<SQLiteConnection, AcquiredConnectionStatus> entry :
                        mAcquiredConnections.entrySet()) {
                    final SQLiteConnection connection = entry.getKey();
                    connection.dumpUnsafe(indentedPrinter, verbose);
                    indentedPrinter.println("  Status: " + entry.getValue());
                }
            } else {
                indentedPrinter.println("<none>");
            }

            printer.println("  Connection waiters:");
            if (mConnectionWaiterQueue != null) {
                int i = 0;
                final long now = SystemClock.uptimeMillis();
                for (ConnectionWaiter waiter = mConnectionWaiterQueue; waiter != null;
                        waiter = waiter.mNext, i++) {
                    indentedPrinter.println(i + ": waited for "
                            + ((now - waiter.mStartTime) * 0.001f)
                            + " ms - thread=" + waiter.mThread
                            + ", priority=" + waiter.mPriority
                            + ", sql='" + waiter.mSql + "'");
                }
            } else {
                indentedPrinter.println("<none>");
            }
        }
        */
    }

    @Override
    public String toString() {
        return "SQLiteConnectionPool: " + mConfiguration.path;
    }

    private static final class ConnectionWaiter {
        public ConnectionWaiter mNext;
        public Thread mThread;
        public long mStartTime;
        public int mPriority;
        public boolean mWantPrimaryConnection;
        public String mSql;
        public int mConnectionFlags;
        public SQLiteConnection mAssignedConnection;
        public RuntimeException mException;
        public int mNonce;
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteConstraintException.java.






































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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that an integrity constraint was violated.
 */
public class SQLiteConstraintException extends SQLiteException {
    public SQLiteConstraintException() {}

    public SQLiteConstraintException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteCursor.java.























































































































































































































































































































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import org.sqlite.database.ExtraUtils;

import android.database.AbstractWindowedCursor;
import android.database.CursorWindow;

import android.os.StrictMode;
import android.util.Log;

import java.util.HashMap;
import java.util.Map;

/**
 * A Cursor implementation that exposes results from a query on a
 * {@link SQLiteDatabase}.
 *
 * SQLiteCursor is not internally synchronized so code using a SQLiteCursor from multiple
 * threads should perform its own synchronization when using the SQLiteCursor.
 */
public class SQLiteCursor extends AbstractWindowedCursor {
    static final String TAG = "SQLiteCursor";
    static final int NO_COUNT = -1;

    /** The name of the table to edit */
    private final String mEditTable;

    /** The names of the columns in the rows */
    private final String[] mColumns;

    /** The query object for the cursor */
    private final SQLiteQuery mQuery;

    /** The compiled query this cursor came from */
    private final SQLiteCursorDriver mDriver;

    /** The number of rows in the cursor */
    private int mCount = NO_COUNT;

    /** The number of rows that can fit in the cursor window, 0 if unknown */
    private int mCursorWindowCapacity;

    /** A mapping of column names to column indices, to speed up lookups */
    private Map<String, Integer> mColumnNameMap;

    /** Used to find out where a cursor was allocated in case it never got released. */
    private final Throwable mStackTrace;

    /**
     * Execute a query and provide access to its result set through a Cursor
     * interface. For a query such as: {@code SELECT name, birth, phone FROM
     * myTable WHERE ... LIMIT 1,20 ORDER BY...} the column names (name, birth,
     * phone) would be in the projection argument and everything from
     * {@code FROM} onward would be in the params argument.
     *
     * @param db a reference to a Database object that is already constructed
     *     and opened. This param is not used any longer
     * @param editTable the name of the table used for this query
     * @param query the rest of the query terms
     *     cursor is finalized
     * @deprecated use {@link #SQLiteCursor(SQLiteCursorDriver, String, SQLiteQuery)} instead
     */
    @Deprecated
    public SQLiteCursor(SQLiteDatabase db, SQLiteCursorDriver driver,
            String editTable, SQLiteQuery query) {
        this(driver, editTable, query);
    }

    /**
     * Execute a query and provide access to its result set through a Cursor
     * interface. For a query such as: {@code SELECT name, birth, phone FROM
     * myTable WHERE ... LIMIT 1,20 ORDER BY...} the column names (name, birth,
     * phone) would be in the projection argument and everything from
     * {@code FROM} onward would be in the params argument.
     *
     * @param editTable the name of the table used for this query
     * @param query the {@link SQLiteQuery} object associated with this cursor object.
     */
    public SQLiteCursor(SQLiteCursorDriver driver, String editTable, SQLiteQuery query) {
        if (query == null) {
            throw new IllegalArgumentException("query object cannot be null");
        }
        if (/* StrictMode.vmSqliteObjectLeaksEnabled() */ false ) {
            mStackTrace = new DatabaseObjectNotClosedException().fillInStackTrace();
        } else {
            mStackTrace = null;
        }
        mDriver = driver;
        mEditTable = editTable;
        mColumnNameMap = null;
        mQuery = query;

        mColumns = query.getColumnNames();
    }

    /**
     * Get the database that this cursor is associated with.
     * @return the SQLiteDatabase that this cursor is associated with.
     */
    public SQLiteDatabase getDatabase() {
        return mQuery.getDatabase();
    }

    @Override
    public boolean onMove(int oldPosition, int newPosition) {
        // Make sure the row at newPosition is present in the window
        if (mWindow == null || newPosition < mWindow.getStartPosition() ||
                newPosition >= (mWindow.getStartPosition() + mWindow.getNumRows())) {
            fillWindow(newPosition);
        }

        return true;
    }

    @Override
    public int getCount() {
        if (mCount == NO_COUNT) {
            fillWindow(0);
        }
        return mCount;
    }

    /* 
    ** The AbstractWindowClass contains protected methods clearOrCreateWindow() and
    ** closeWindow(), which are used by the android.database.sqlite.* version of this
    ** class. But, since they are marked with "@hide", the following replacement 
    ** versions are required.
    */
    private void awc_clearOrCreateWindow(String name){
      CursorWindow win = getWindow();
      if( win==null ){
        win = new CursorWindow(name);
        setWindow(win);
      }else{
        win.clear();
      }
    }
    private void awc_closeWindow(){
      setWindow(null);
    }

    private void fillWindow(int requiredPos) {
        awc_clearOrCreateWindow(getDatabase().getPath());

        try {
            if (mCount == NO_COUNT) {
                int startPos = ExtraUtils.cursorPickFillWindowStartPosition(requiredPos, 0);
                mCount = mQuery.fillWindow(mWindow, startPos, requiredPos, true);
                mCursorWindowCapacity = mWindow.getNumRows();
                if (Log.isLoggable(TAG, Log.DEBUG)) {
                    Log.d(TAG, "received count(*) from native_fill_window: " + mCount);
                }
            } else {
                int startPos = ExtraUtils.cursorPickFillWindowStartPosition(requiredPos,
                        mCursorWindowCapacity);
                mQuery.fillWindow(mWindow, startPos, requiredPos, false);
            }
        } catch (RuntimeException ex) {
            // Close the cursor window if the query failed and therefore will
            // not produce any results.  This helps to avoid accidentally leaking
            // the cursor window if the client does not correctly handle exceptions
            // and fails to close the cursor.
            awc_closeWindow();
            throw ex;
        }
    }

    @Override
    public int getColumnIndex(String columnName) {
        // Create mColumnNameMap on demand
        if (mColumnNameMap == null) {
            String[] columns = mColumns;
            int columnCount = columns.length;
            HashMap<String, Integer> map = new HashMap<String, Integer>(columnCount, 1);
            for (int i = 0; i < columnCount; i++) {
                map.put(columns[i], i);
            }
            mColumnNameMap = map;
        }

        // Hack according to bug 903852
        final int periodIndex = columnName.lastIndexOf('.');
        if (periodIndex != -1) {
            Exception e = new Exception();
            Log.e(TAG, "requesting column name with table name -- " + columnName, e);
            columnName = columnName.substring(periodIndex + 1);
        }

        Integer i = mColumnNameMap.get(columnName);
        if (i != null) {
            return i.intValue();
        } else {
            return -1;
        }
    }

    @Override
    public String[] getColumnNames() {
        return mColumns;
    }

    @Override
    public void deactivate() {
        super.deactivate();
        mDriver.cursorDeactivated();
    }

    @Override
    public void close() {
        super.close();
        synchronized (this) {
            mQuery.close();
            mDriver.cursorClosed();
        }
    }

    @Override
    public boolean requery() {
        if (isClosed()) {
            return false;
        }

        synchronized (this) {
            if (!mQuery.getDatabase().isOpen()) {
                return false;
            }

            if (mWindow != null) {
                mWindow.clear();
            }
            mPos = -1;
            mCount = NO_COUNT;

            mDriver.cursorRequeried(this);
        }

        try {
            return super.requery();
        } catch (IllegalStateException e) {
            // for backwards compatibility, just return false
            Log.w(TAG, "requery() failed " + e.getMessage(), e);
            return false;
        }
    }

    @Override
    public void setWindow(CursorWindow window) {
        super.setWindow(window);
        mCount = NO_COUNT;
    }

    /**
     * Changes the selection arguments. The new values take effect after a call to requery().
     */
    public void setSelectionArguments(String[] selectionArgs) {
        mDriver.setBindArguments(selectionArgs);
    }

    /**
     * Release the native resources, if they haven't been released yet.
     */
    @Override
    protected void finalize() {
        try {
            // if the cursor hasn't been closed yet, close it first
            if (mWindow != null) {
                    /*
                if (mStackTrace != null) {
                    String sql = mQuery.getSql();
                    int len = sql.length();
                    StrictMode.onSqliteObjectLeaked(
                        "Finalizing a Cursor that has not been deactivated or closed. " +
                        "database = " + mQuery.getDatabase().getLabel() +
                        ", table = " + mEditTable +
                        ", query = " + sql.substring(0, (len > 1000) ? 1000 : len),
                        mStackTrace);
                }
                */
                close();
            }
        } finally {
            super.finalize();
        }
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteCursorDriver.java.


































































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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.database.Cursor;
import org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory;

/**
 * A driver for SQLiteCursors that is used to create them and gets notified
 * by the cursors it creates on significant events in their lifetimes.
 */
public interface SQLiteCursorDriver {
    /**
     * Executes the query returning a Cursor over the result set.
     * 
     * @param factory The CursorFactory to use when creating the Cursors, or
     *         null if standard SQLiteCursors should be returned.
     * @return a Cursor over the result set
     */
    Cursor query(CursorFactory factory, String[] bindArgs);

    /**
     * Called by a SQLiteCursor when it is released.
     */
    void cursorDeactivated();

    /**
     * Called by a SQLiteCursor when it is requeried.
     */
    void cursorRequeried(Cursor cursor);

    /**
     * Called by a SQLiteCursor when it it closed to destroy this object as well.
     */
    void cursorClosed();

    /**
     * Set new bind arguments. These will take effect in cursorRequeried().
     * @param bindArgs the new arguments
     */
    public void setBindArguments(String[] bindArgs);
}






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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * Describes a custom SQL function.
 *
 * @hide
 */
public final class SQLiteCustomFunction {
    public final String name;
    public final int numArgs;
    public final SQLiteDatabase.CustomFunction callback;

    /**
     * Create custom function.
     *
     * @param name The name of the sqlite3 function.
     * @param numArgs The number of arguments for the function, or -1 to
     * support any number of arguments.
     * @param callback The callback to invoke when the function is executed.
     */
    public SQLiteCustomFunction(String name, int numArgs,
            SQLiteDatabase.CustomFunction callback) {
        if (name == null) {
            throw new IllegalArgumentException("name must not be null.");
        }

        this.name = name;
        this.numArgs = numArgs;
        this.callback = callback;
    }

    // Called from native.
    @SuppressWarnings("unused")
    private void dispatchCallback(String[] args) {
        callback.callback(args);
    }
}






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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.content.ContentValues;
import android.database.Cursor;
import org.sqlite.database.DatabaseErrorHandler;
import android.database.DatabaseUtils;
import org.sqlite.database.ExtraUtils;
import org.sqlite.database.DefaultDatabaseErrorHandler;
import org.sqlite.database.SQLException;
import org.sqlite.database.sqlite.SQLiteDebug.DbStats;
import android.os.CancellationSignal;
import android.os.Looper;
import android.os.OperationCanceledException;
import android.text.TextUtils;
import android.util.EventLog;
import android.util.Log;
import android.util.Pair;
import android.util.Printer;

import org.sqlite.database.sqlite.CloseGuard;

import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.WeakHashMap;

/**
 * Exposes methods to manage a SQLite database.
 *
 * <p>
 * SQLiteDatabase has methods to create, delete, execute SQL commands, and
 * perform other common database management tasks.
 * </p><p>
 * See the Notepad sample application in the SDK for an example of creating
 * and managing a database.
 * </p><p>
 * Database names must be unique within an application, not across all applications.
 * </p>
 *
 * <h3>Localized Collation - ORDER BY</h3>
 * <p>
 * In addition to SQLite's default <code>BINARY</code> collator, Android supplies
 * two more, <code>LOCALIZED</code>, which changes with the system's current locale,
 * and <code>UNICODE</code>, which is the Unicode Collation Algorithm and not tailored
 * to the current locale.
 * </p>
 */
public final class SQLiteDatabase extends SQLiteClosable {
    private static final String TAG = "SQLiteDatabase";

    private static final int EVENT_DB_CORRUPT = 75004;

    // Stores reference to all databases opened in the current process.
    // (The referent Object is not used at this time.)
    // INVARIANT: Guarded by sActiveDatabases.
    private static WeakHashMap<SQLiteDatabase, Object> sActiveDatabases =
            new WeakHashMap<SQLiteDatabase, Object>();

    // Thread-local for database sessions that belong to this database.
    // Each thread has its own database session.
    // INVARIANT: Immutable.
    private final ThreadLocal<SQLiteSession> mThreadSession = new ThreadLocal<SQLiteSession>() {
        @Override
        protected SQLiteSession initialValue() {
            return createSession();
        }
    };

    // The optional factory to use when creating new Cursors.  May be null.
    // INVARIANT: Immutable.
    private final CursorFactory mCursorFactory;

    // Error handler to be used when SQLite returns corruption errors.
    // INVARIANT: Immutable.
    private final DatabaseErrorHandler mErrorHandler;

    // Shared database state lock.
    // This lock guards all of the shared state of the database, such as its
    // configuration, whether it is open or closed, and so on.  This lock should
    // be held for as little time as possible.
    //
    // The lock MUST NOT be held while attempting to acquire database connections or
    // while executing SQL statements on behalf of the client as it can lead to deadlock.
    //
    // It is ok to hold the lock while reconfiguring the connection pool or dumping
    // statistics because those operations are non-reentrant and do not try to acquire
    // connections that might be held by other threads.
    //
    // Basic rule: grab the lock, access or modify global state, release the lock, then
    // do the required SQL work.
    private final Object mLock = new Object();

    // Warns if the database is finalized without being closed properly.
    // INVARIANT: Guarded by mLock.
    private final CloseGuard mCloseGuardLocked = CloseGuard.get();

    // The database configuration.
    // INVARIANT: Guarded by mLock.
    private final SQLiteDatabaseConfiguration mConfigurationLocked;

    // The connection pool for the database, null when closed.
    // The pool itself is thread-safe, but the reference to it can only be acquired
    // when the lock is held.
    // INVARIANT: Guarded by mLock.
    private SQLiteConnectionPool mConnectionPoolLocked;

    // True if the database has attached databases.
    // INVARIANT: Guarded by mLock.
    private boolean mHasAttachedDbsLocked;

    /**
     * When a constraint violation occurs, an immediate ROLLBACK occurs,
     * thus ending the current transaction, and the command aborts with a
     * return code of SQLITE_CONSTRAINT. If no transaction is active
     * (other than the implied transaction that is created on every command)
     * then this algorithm works the same as ABORT.
     */
    public static final int CONFLICT_ROLLBACK = 1;

    /**
     * When a constraint violation occurs,no ROLLBACK is executed
     * so changes from prior commands within the same transaction
     * are preserved. This is the default behavior.
     */
    public static final int CONFLICT_ABORT = 2;

    /**
     * When a constraint violation occurs, the command aborts with a return
     * code SQLITE_CONSTRAINT. But any changes to the database that
     * the command made prior to encountering the constraint violation
     * are preserved and are not backed out.
     */
    public static final int CONFLICT_FAIL = 3;

    /**
     * When a constraint violation occurs, the one row that contains
     * the constraint violation is not inserted or changed.
     * But the command continues executing normally. Other rows before and
     * after the row that contained the constraint violation continue to be
     * inserted or updated normally. No error is returned.
     */
    public static final int CONFLICT_IGNORE = 4;

    /**
     * When a UNIQUE constraint violation occurs, the pre-existing rows that
     * are causing the constraint violation are removed prior to inserting
     * or updating the current row. Thus the insert or update always occurs.
     * The command continues executing normally. No error is returned.
     * If a NOT NULL constraint violation occurs, the NULL value is replaced
     * by the default value for that column. If the column has no default
     * value, then the ABORT algorithm is used. If a CHECK constraint
     * violation occurs then the IGNORE algorithm is used. When this conflict
     * resolution strategy deletes rows in order to satisfy a constraint,
     * it does not invoke delete triggers on those rows.
     * This behavior might change in a future release.
     */
    public static final int CONFLICT_REPLACE = 5;

    /**
     * Use the following when no conflict action is specified.
     */
    public static final int CONFLICT_NONE = 0;

    private static final String[] CONFLICT_VALUES = new String[]
            {"", " OR ROLLBACK ", " OR ABORT ", " OR FAIL ", " OR IGNORE ", " OR REPLACE "};

    /**
     * Maximum Length Of A LIKE Or GLOB Pattern
     * The pattern matching algorithm used in the default LIKE and GLOB implementation
     * of SQLite can exhibit O(N^2) performance (where N is the number of characters in
     * the pattern) for certain pathological cases. To avoid denial-of-service attacks
     * the length of the LIKE or GLOB pattern is limited to SQLITE_MAX_LIKE_PATTERN_LENGTH bytes.
     * The default value of this limit is 50000. A modern workstation can evaluate
     * even a pathological LIKE or GLOB pattern of 50000 bytes relatively quickly.
     * The denial of service problem only comes into play when the pattern length gets
     * into millions of bytes. Nevertheless, since most useful LIKE or GLOB patterns
     * are at most a few dozen bytes in length, paranoid application developers may
     * want to reduce this parameter to something in the range of a few hundred
     * if they know that external users are able to generate arbitrary patterns.
     */
    public static final int SQLITE_MAX_LIKE_PATTERN_LENGTH = 50000;

    /**
     * Open flag: Flag for {@link #openDatabase} to open the database for reading and writing.
     * If the disk is full, this may fail even before you actually write anything.
     *
     * {@more} Note that the value of this flag is 0, so it is the default.
     */
    public static final int OPEN_READWRITE = 0x00000000;          // update native code if changing

    /**
     * Open flag: Flag for {@link #openDatabase} to open the database for reading only.
     * This is the only reliable way to open a database if the disk may be full.
     */
    public static final int OPEN_READONLY = 0x00000001;           // update native code if changing

    private static final int OPEN_READ_MASK = 0x00000001;         // update native code if changing

    /**
     * Open flag: Flag for {@link #openDatabase} to open the database without support for
     * localized collators.
     *
     * {@more} This causes the collator <code>LOCALIZED</code> not to be created.
     * You must be consistent when using this flag to use the setting the database was
     * created with.  If this is set, {@link #setLocale} will do nothing.
     */
    public static final int NO_LOCALIZED_COLLATORS = 0x00000010;  // update native code if changing

    /**
     * Open flag: Flag for {@link #openDatabase} to create the database file if it does not
     * already exist.
     */
    public static final int CREATE_IF_NECESSARY = 0x10000000;     // update native code if changing

    /**
     * Open flag: Flag for {@link #openDatabase} to open the database file with
     * write-ahead logging enabled by default.  Using this flag is more efficient
     * than calling {@link #enableWriteAheadLogging}.
     *
     * Write-ahead logging cannot be used with read-only databases so the value of
     * this flag is ignored if the database is opened read-only.
     *
     * @see #enableWriteAheadLogging
     */
    public static final int ENABLE_WRITE_AHEAD_LOGGING = 0x20000000;

    /**
     * Absolute max value that can be set by {@link #setMaxSqlCacheSize(int)}.
     *
     * Each prepared-statement is between 1K - 6K, depending on the complexity of the
     * SQL statement & schema.  A large SQL cache may use a significant amount of memory.
     */
    public static final int MAX_SQL_CACHE_SIZE = 100;

    private SQLiteDatabase(String path, int openFlags, CursorFactory cursorFactory,
            DatabaseErrorHandler errorHandler) {
        mCursorFactory = cursorFactory;
        mErrorHandler = errorHandler != null ? errorHandler : new DefaultDatabaseErrorHandler();
        mConfigurationLocked = new SQLiteDatabaseConfiguration(path, openFlags);
    }

    @Override
    protected void finalize() throws Throwable {
        try {
            dispose(true);
        } finally {
            super.finalize();
        }
    }

    @Override
    protected void onAllReferencesReleased() {
        dispose(false);
    }

    private void dispose(boolean finalized) {
        final SQLiteConnectionPool pool;
        synchronized (mLock) {
            if (mCloseGuardLocked != null) {
                if (finalized) {
                    mCloseGuardLocked.warnIfOpen();
                }
                mCloseGuardLocked.close();
            }

            pool = mConnectionPoolLocked;
            mConnectionPoolLocked = null;
        }

        if (!finalized) {
            synchronized (sActiveDatabases) {
                sActiveDatabases.remove(this);
            }

            if (pool != null) {
                pool.close();
            }
        }
    }

    /**
     * Attempts to release memory that SQLite holds but does not require to
     * operate properly. Typically this memory will come from the page cache.
     *
     * @return the number of bytes actually released
     */
    public static int releaseMemory() {
        return SQLiteGlobal.releaseMemory();
    }

    /**
     * Control whether or not the SQLiteDatabase is made thread-safe by using locks
     * around critical sections. This is pretty expensive, so if you know that your
     * DB will only be used by a single thread then you should set this to false.
     * The default is true.
     * @param lockingEnabled set to true to enable locks, false otherwise
     *
     * @deprecated This method now does nothing.  Do not use.
     */
    @Deprecated
    public void setLockingEnabled(boolean lockingEnabled) {
    }

    /**
     * Gets a label to use when describing the database in log messages.
     * @return The label.
     */
    String getLabel() {
        synchronized (mLock) {
            return mConfigurationLocked.label;
        }
    }

    /**
     * Sends a corruption message to the database error handler.
     */
    void onCorruption() {
        EventLog.writeEvent(EVENT_DB_CORRUPT, getLabel());
        mErrorHandler.onCorruption(this);
    }

    /**
     * Gets the {@link SQLiteSession} that belongs to this thread for this database.
     * Once a thread has obtained a session, it will continue to obtain the same
     * session even after the database has been closed (although the session will not
     * be usable).  However, a thread that does not already have a session cannot
     * obtain one after the database has been closed.
     *
     * The idea is that threads that have active connections to the database may still
     * have work to complete even after the call to {@link #close}.  Active database
     * connections are not actually disposed until they are released by the threads
     * that own them.
     *
     * @return The session, never null.
     *
     * @throws IllegalStateException if the thread does not yet have a session and
     * the database is not open.
     */
    SQLiteSession getThreadSession() {
        return mThreadSession.get(); // initialValue() throws if database closed
    }

    SQLiteSession createSession() {
        final SQLiteConnectionPool pool;
        synchronized (mLock) {
            throwIfNotOpenLocked();
            pool = mConnectionPoolLocked;
        }
        return new SQLiteSession(pool);
    }

    /**
     * Gets default connection flags that are appropriate for this thread, taking into
     * account whether the thread is acting on behalf of the UI.
     *
     * @param readOnly True if the connection should be read-only.
     * @return The connection flags.
     */
    int getThreadDefaultConnectionFlags(boolean readOnly) {
        int flags = readOnly ? SQLiteConnectionPool.CONNECTION_FLAG_READ_ONLY :
                SQLiteConnectionPool.CONNECTION_FLAG_PRIMARY_CONNECTION_AFFINITY;
        if (isMainThread()) {
            flags |= SQLiteConnectionPool.CONNECTION_FLAG_INTERACTIVE;
        }
        return flags;
    }

    private static boolean isMainThread() {
        // FIXME: There should be a better way to do this.
        // Would also be nice to have something that would work across Binder calls.
        Looper looper = Looper.myLooper();
        return looper != null && looper == Looper.getMainLooper();
    }

    /**
     * Begins a transaction in EXCLUSIVE mode.
     * <p>
     * Transactions can be nested.
     * When the outer transaction is ended all of
     * the work done in that transaction and all of the nested transactions will be committed or
     * rolled back. The changes will be rolled back if any transaction is ended without being
     * marked as clean (by calling setTransactionSuccessful). Otherwise they will be committed.
     * </p>
     * <p>Here is the standard idiom for transactions:
     *
     * <pre>
     *   db.beginTransaction();
     *   try {
     *     ...
     *     db.setTransactionSuccessful();
     *   } finally {
     *     db.endTransaction();
     *   }
     * </pre>
     */
    public void beginTransaction() {
        beginTransaction(null /* transactionStatusCallback */, true);
    }

    /**
     * Begins a transaction in IMMEDIATE mode. Transactions can be nested. When
     * the outer transaction is ended all of the work done in that transaction
     * and all of the nested transactions will be committed or rolled back. The
     * changes will be rolled back if any transaction is ended without being
     * marked as clean (by calling setTransactionSuccessful). Otherwise they
     * will be committed.
     * <p>
     * Here is the standard idiom for transactions:
     *
     * <pre>
     *   db.beginTransactionNonExclusive();
     *   try {
     *     ...
     *     db.setTransactionSuccessful();
     *   } finally {
     *     db.endTransaction();
     *   }
     * </pre>
     */
    public void beginTransactionNonExclusive() {
        beginTransaction(null /* transactionStatusCallback */, false);
    }

    /**
     * Begins a transaction in EXCLUSIVE mode.
     * <p>
     * Transactions can be nested.
     * When the outer transaction is ended all of
     * the work done in that transaction and all of the nested transactions will be committed or
     * rolled back. The changes will be rolled back if any transaction is ended without being
     * marked as clean (by calling setTransactionSuccessful). Otherwise they will be committed.
     * </p>
     * <p>Here is the standard idiom for transactions:
     *
     * <pre>
     *   db.beginTransactionWithListener(listener);
     *   try {
     *     ...
     *     db.setTransactionSuccessful();
     *   } finally {
     *     db.endTransaction();
     *   }
     * </pre>
     *
     * @param transactionListener listener that should be notified when the transaction begins,
     * commits, or is rolled back, either explicitly or by a call to
     * {@link #yieldIfContendedSafely}.
     */
    public void beginTransactionWithListener(SQLiteTransactionListener transactionListener) {
        beginTransaction(transactionListener, true);
    }

    /**
     * Begins a transaction in IMMEDIATE mode. Transactions can be nested. When
     * the outer transaction is ended all of the work done in that transaction
     * and all of the nested transactions will be committed or rolled back. The
     * changes will be rolled back if any transaction is ended without being
     * marked as clean (by calling setTransactionSuccessful). Otherwise they
     * will be committed.
     * <p>
     * Here is the standard idiom for transactions:
     *
     * <pre>
     *   db.beginTransactionWithListenerNonExclusive(listener);
     *   try {
     *     ...
     *     db.setTransactionSuccessful();
     *   } finally {
     *     db.endTransaction();
     *   }
     * </pre>
     *
     * @param transactionListener listener that should be notified when the
     *            transaction begins, commits, or is rolled back, either
     *            explicitly or by a call to {@link #yieldIfContendedSafely}.
     */
    public void beginTransactionWithListenerNonExclusive(
            SQLiteTransactionListener transactionListener) {
        beginTransaction(transactionListener, false);
    }

    private void beginTransaction(SQLiteTransactionListener transactionListener,
            boolean exclusive) {
        acquireReference();
        try {
            getThreadSession().beginTransaction(
                    exclusive ? SQLiteSession.TRANSACTION_MODE_EXCLUSIVE :
                            SQLiteSession.TRANSACTION_MODE_IMMEDIATE,
                    transactionListener,
                    getThreadDefaultConnectionFlags(false /*readOnly*/), null);
        } finally {
            releaseReference();
        }
    }

    /**
     * End a transaction. See beginTransaction for notes about how to use this and when transactions
     * are committed and rolled back.
     */
    public void endTransaction() {
        acquireReference();
        try {
            getThreadSession().endTransaction(null);
        } finally {
            releaseReference();
        }
    }

    /**
     * Marks the current transaction as successful. Do not do any more database work between
     * calling this and calling endTransaction. Do as little non-database work as possible in that
     * situation too. If any errors are encountered between this and endTransaction the transaction
     * will still be committed.
     *
     * @throws IllegalStateException if the current thread is not in a transaction or the
     * transaction is already marked as successful.
     */
    public void setTransactionSuccessful() {
        acquireReference();
        try {
            getThreadSession().setTransactionSuccessful();
        } finally {
            releaseReference();
        }
    }

    /**
     * Returns true if the current thread has a transaction pending.
     *
     * @return True if the current thread is in a transaction.
     */
    public boolean inTransaction() {
        acquireReference();
        try {
            return getThreadSession().hasTransaction();
        } finally {
            releaseReference();
        }
    }

    /**
     * Returns true if the current thread is holding an active connection to the database.
     * <p>
     * The name of this method comes from a time when having an active connection
     * to the database meant that the thread was holding an actual lock on the
     * database.  Nowadays, there is no longer a true "database lock" although threads
     * may block if they cannot acquire a database connection to perform a
     * particular operation.
     * </p>
     *
     * @return True if the current thread is holding an active connection to the database.
     */
    public boolean isDbLockedByCurrentThread() {
        acquireReference();
        try {
            return getThreadSession().hasConnection();
        } finally {
            releaseReference();
        }
    }

    /**
     * Always returns false.
     * <p>
     * There is no longer the concept of a database lock, so this method always returns false.
     * </p>
     *
     * @return False.
     * @deprecated Always returns false.  Do not use this method.
     */
    @Deprecated
    public boolean isDbLockedByOtherThreads() {
        return false;
    }

    /**
     * Temporarily end the transaction to let other threads run. The transaction is assumed to be
     * successful so far. Do not call setTransactionSuccessful before calling this. When this
     * returns a new transaction will have been created but not marked as successful.
     * @return true if the transaction was yielded
     * @deprecated if the db is locked more than once (becuase of nested transactions) then the lock
     *   will not be yielded. Use yieldIfContendedSafely instead.
     */
    @Deprecated
    public boolean yieldIfContended() {
        return yieldIfContendedHelper(false /* do not check yielding */,
                -1 /* sleepAfterYieldDelay */);
    }

    /**
     * Temporarily end the transaction to let other threads run. The transaction is assumed to be
     * successful so far. Do not call setTransactionSuccessful before calling this. When this
     * returns a new transaction will have been created but not marked as successful. This assumes
     * that there are no nested transactions (beginTransaction has only been called once) and will
     * throw an exception if that is not the case.
     * @return true if the transaction was yielded
     */
    public boolean yieldIfContendedSafely() {
        return yieldIfContendedHelper(true /* check yielding */, -1 /* sleepAfterYieldDelay*/);
    }

    /**
     * Temporarily end the transaction to let other threads run. The transaction is assumed to be
     * successful so far. Do not call setTransactionSuccessful before calling this. When this
     * returns a new transaction will have been created but not marked as successful. This assumes
     * that there are no nested transactions (beginTransaction has only been called once) and will
     * throw an exception if that is not the case.
     * @param sleepAfterYieldDelay if > 0, sleep this long before starting a new transaction if
     *   the lock was actually yielded. This will allow other background threads to make some
     *   more progress than they would if we started the transaction immediately.
     * @return true if the transaction was yielded
     */
    public boolean yieldIfContendedSafely(long sleepAfterYieldDelay) {
        return yieldIfContendedHelper(true /* check yielding */, sleepAfterYieldDelay);
    }

    private boolean yieldIfContendedHelper(boolean throwIfUnsafe, long sleepAfterYieldDelay) {
        acquireReference();
        try {
            return getThreadSession().yieldTransaction(sleepAfterYieldDelay, throwIfUnsafe, null);
        } finally {
            releaseReference();
        }
    }

    /**
     * Deprecated.
     * @deprecated This method no longer serves any useful purpose and has been deprecated.
     */
    @Deprecated
    public Map<String, String> getSyncedTables() {
        return new HashMap<String, String>(0);
    }

    /**
     * Open the database according to the flags {@link #OPEN_READWRITE}
     * {@link #OPEN_READONLY} {@link #CREATE_IF_NECESSARY} and/or {@link #NO_LOCALIZED_COLLATORS}.
     *
     * <p>Sets the locale of the database to the  the system's current locale.
     * Call {@link #setLocale} if you would like something else.</p>
     *
     * @param path to database file to open and/or create
     * @param factory an optional factory class that is called to instantiate a
     *            cursor when query is called, or null for default
     * @param flags to control database access mode
     * @return the newly opened database
     * @throws SQLiteException if the database cannot be opened
     */
    public static SQLiteDatabase openDatabase(String path, CursorFactory factory, int flags) {
        return openDatabase(path, factory, flags, null);
    }

    /**
     * Open the database according to the flags {@link #OPEN_READWRITE}
     * {@link #OPEN_READONLY} {@link #CREATE_IF_NECESSARY} and/or {@link #NO_LOCALIZED_COLLATORS}.
     *
     * <p>Sets the locale of the database to the  the system's current locale.
     * Call {@link #setLocale} if you would like something else.</p>
     *
     * <p>Accepts input param: a concrete instance of {@link DatabaseErrorHandler} to be
     * used to handle corruption when sqlite reports database corruption.</p>
     *
     * @param path to database file to open and/or create
     * @param factory an optional factory class that is called to instantiate a
     *            cursor when query is called, or null for default
     * @param flags to control database access mode
     * @param errorHandler the {@link DatabaseErrorHandler} obj to be used to handle corruption
     * when sqlite reports database corruption
     * @return the newly opened database
     * @throws SQLiteException if the database cannot be opened
     */
    public static SQLiteDatabase openDatabase(String path, CursorFactory factory, int flags,
            DatabaseErrorHandler errorHandler) {
        SQLiteDatabase db = new SQLiteDatabase(path, flags, factory, errorHandler);
        db.open();
        return db;
    }

    /**
     * Equivalent to openDatabase(file.getPath(), factory, CREATE_IF_NECESSARY).
     */
    public static SQLiteDatabase openOrCreateDatabase(File file, CursorFactory factory) {
        return openOrCreateDatabase(file.getPath(), factory);
    }

    /**
     * Equivalent to openDatabase(path, factory, CREATE_IF_NECESSARY).
     */
    public static SQLiteDatabase openOrCreateDatabase(String path, CursorFactory factory) {
        return openDatabase(path, factory, CREATE_IF_NECESSARY, null);
    }

    /**
     * Equivalent to openDatabase(path, factory, CREATE_IF_NECESSARY, errorHandler).
     */
    public static SQLiteDatabase openOrCreateDatabase(String path, CursorFactory factory,
            DatabaseErrorHandler errorHandler) {
        return openDatabase(path, factory, CREATE_IF_NECESSARY, errorHandler);
    }

    /**
     * Deletes a database including its journal file and other auxiliary files
     * that may have been created by the database engine.
     *
     * @param file The database file path.
     * @return True if the database was successfully deleted.
     */
    public static boolean deleteDatabase(File file) {
        if (file == null) {
            throw new IllegalArgumentException("file must not be null");
        }

        boolean deleted = false;
        deleted |= file.delete();
        deleted |= new File(file.getPath() + "-journal").delete();
        deleted |= new File(file.getPath() + "-shm").delete();
        deleted |= new File(file.getPath() + "-wal").delete();

        File dir = file.getParentFile();
        if (dir != null) {
            final String prefix = file.getName() + "-mj";
            final FileFilter filter = new FileFilter() {
                @Override
                public boolean accept(File candidate) {
                    return candidate.getName().startsWith(prefix);
                }
            };
            for (File masterJournal : dir.listFiles(filter)) {
                deleted |= masterJournal.delete();
            }
        }
        return deleted;
    }

    /**
     * Reopens the database in read-write mode.
     * If the database is already read-write, does nothing.
     *
     * @throws SQLiteException if the database could not be reopened as requested, in which
     * case it remains open in read only mode.
     * @throws IllegalStateException if the database is not open.
     *
     * @see #isReadOnly()
     * @hide
     */
    public void reopenReadWrite() {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            if (!isReadOnlyLocked()) {
                return; // nothing to do
            }

            // Reopen the database in read-write mode.
            final int oldOpenFlags = mConfigurationLocked.openFlags;
            mConfigurationLocked.openFlags = (mConfigurationLocked.openFlags & ~OPEN_READ_MASK)
                    | OPEN_READWRITE;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.openFlags = oldOpenFlags;
                throw ex;
            }
        }
    }

    private void open() {
        try {
            try {
                openInner();
            } catch (SQLiteDatabaseCorruptException ex) {
                onCorruption();
                openInner();
            }
        } catch (SQLiteException ex) {
            Log.e(TAG, "Failed to open database '" + getLabel() + "'.", ex);
            close();
            throw ex;
        }
    }

    private void openInner() {
        synchronized (mLock) {
            assert mConnectionPoolLocked == null;
            mConnectionPoolLocked = SQLiteConnectionPool.open(mConfigurationLocked);
            mCloseGuardLocked.open("close");
        }

        synchronized (sActiveDatabases) {
            sActiveDatabases.put(this, null);
        }
    }

    /**
     * Create a memory backed SQLite database.  Its contents will be destroyed
     * when the database is closed.
     *
     * <p>Sets the locale of the database to the  the system's current locale.
     * Call {@link #setLocale} if you would like something else.</p>
     *
     * @param factory an optional factory class that is called to instantiate a
     *            cursor when query is called
     * @return a SQLiteDatabase object, or null if the database can't be created
     */
    public static SQLiteDatabase create(CursorFactory factory) {
        // This is a magic string with special meaning for SQLite.
        return openDatabase(SQLiteDatabaseConfiguration.MEMORY_DB_PATH,
                factory, CREATE_IF_NECESSARY);
    }

    /**
     * Registers a CustomFunction callback as a function that can be called from
     * SQLite database triggers.
     *
     * @param name the name of the sqlite3 function
     * @param numArgs the number of arguments for the function
     * @param function callback to call when the function is executed
     * @hide
     */
    public void addCustomFunction(String name, int numArgs, CustomFunction function) {
        // Create wrapper (also validates arguments).
        SQLiteCustomFunction wrapper = new SQLiteCustomFunction(name, numArgs, function);

        synchronized (mLock) {
            throwIfNotOpenLocked();

            mConfigurationLocked.customFunctions.add(wrapper);
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.customFunctions.remove(wrapper);
                throw ex;
            }
        }
    }

    /**
     * Gets the database version.
     *
     * @return the database version
     */
    public int getVersion() {
        return ((Long) ExtraUtils.longForQuery(this, "PRAGMA user_version;", null)).intValue();
    }

    /**
     * Sets the database version.
     *
     * @param version the new database version
     */
    public void setVersion(int version) {
        execSQL("PRAGMA user_version = " + version);
    }

    /**
     * Returns the maximum size the database may grow to.
     *
     * @return the new maximum database size
     */
    public long getMaximumSize() {
        long pageCount = ExtraUtils.longForQuery(this, "PRAGMA max_page_count;", null);
        return pageCount * getPageSize();
    }

    /**
     * Sets the maximum size the database will grow to. The maximum size cannot
     * be set below the current size.
     *
     * @param numBytes the maximum database size, in bytes
     * @return the new maximum database size
     */
    public long setMaximumSize(long numBytes) {
        long pageSize = getPageSize();
        long numPages = numBytes / pageSize;
        // If numBytes isn't a multiple of pageSize, bump up a page
        if ((numBytes % pageSize) != 0) {
            numPages++;
        }
        long newPageCount = ExtraUtils.longForQuery(this, "PRAGMA max_page_count = " + numPages,
                null);
        return newPageCount * pageSize;
    }

    /**
     * Returns the current database page size, in bytes.
     *
     * @return the database page size, in bytes
     */
    public long getPageSize() {
        return ExtraUtils.longForQuery(this, "PRAGMA page_size;", null);
    }

    /**
     * Sets the database page size. The page size must be a power of two. This
     * method does not work if any data has been written to the database file,
     * and must be called right after the database has been created.
     *
     * @param numBytes the database page size, in bytes
     */
    public void setPageSize(long numBytes) {
        execSQL("PRAGMA page_size = " + numBytes);
    }

    /**
     * Mark this table as syncable. When an update occurs in this table the
     * _sync_dirty field will be set to ensure proper syncing operation.
     *
     * @param table the table to mark as syncable
     * @param deletedTable The deleted table that corresponds to the
     *          syncable table
     * @deprecated This method no longer serves any useful purpose and has been deprecated.
     */
    @Deprecated
    public void markTableSyncable(String table, String deletedTable) {
    }

    /**
     * Mark this table as syncable, with the _sync_dirty residing in another
     * table. When an update occurs in this table the _sync_dirty field of the
     * row in updateTable with the _id in foreignKey will be set to
     * ensure proper syncing operation.
     *
     * @param table an update on this table will trigger a sync time removal
     * @param foreignKey this is the column in table whose value is an _id in
     *          updateTable
     * @param updateTable this is the table that will have its _sync_dirty
     * @deprecated This method no longer serves any useful purpose and has been deprecated.
     */
    @Deprecated
    public void markTableSyncable(String table, String foreignKey, String updateTable) {
    }

    /**
     * Finds the name of the first table, which is editable.
     *
     * @param tables a list of tables
     * @return the first table listed
     */
    public static String findEditTable(String tables) {
        if (!TextUtils.isEmpty(tables)) {
            // find the first word terminated by either a space or a comma
            int spacepos = tables.indexOf(' ');
            int commapos = tables.indexOf(',');

            if (spacepos > 0 && (spacepos < commapos || commapos < 0)) {
                return tables.substring(0, spacepos);
            } else if (commapos > 0 && (commapos < spacepos || spacepos < 0) ) {
                return tables.substring(0, commapos);
            }
            return tables;
        } else {
            throw new IllegalStateException("Invalid tables");
        }
    }

    /**
     * Compiles an SQL statement into a reusable pre-compiled statement object.
     * The parameters are identical to {@link #execSQL(String)}. You may put ?s in the
     * statement and fill in those values with {@link SQLiteProgram#bindString}
     * and {@link SQLiteProgram#bindLong} each time you want to run the
     * statement. Statements may not return result sets larger than 1x1.
     *<p>
     * No two threads should be using the same {@link SQLiteStatement} at the same time.
     *
     * @param sql The raw SQL statement, may contain ? for unknown values to be
     *            bound later.
     * @return A pre-compiled {@link SQLiteStatement} object. Note that
     * {@link SQLiteStatement}s are not synchronized, see the documentation for more details.
     */
    public SQLiteStatement compileStatement(String sql) throws SQLException {
        acquireReference();
        try {
            return new SQLiteStatement(this, sql, null);
        } finally {
            releaseReference();
        }
    }

    /**
     * Query the given URL, returning a {@link Cursor} over the result set.
     *
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor query(boolean distinct, String table, String[] columns,
            String selection, String[] selectionArgs, String groupBy,
            String having, String orderBy, String limit) {
        return queryWithFactory(null, distinct, table, columns, selection, selectionArgs,
                groupBy, having, orderBy, limit, null);
    }

    /**
     * Query the given URL, returning a {@link Cursor} over the result set.
     *
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor query(boolean distinct, String table, String[] columns,
            String selection, String[] selectionArgs, String groupBy,
            String having, String orderBy, String limit, CancellationSignal cancellationSignal) {
        return queryWithFactory(null, distinct, table, columns, selection, selectionArgs,
                groupBy, having, orderBy, limit, cancellationSignal);
    }

    /**
     * Query the given URL, returning a {@link Cursor} over the result set.
     *
     * @param cursorFactory the cursor factory to use, or null for the default factory
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor queryWithFactory(CursorFactory cursorFactory,
            boolean distinct, String table, String[] columns,
            String selection, String[] selectionArgs, String groupBy,
            String having, String orderBy, String limit) {
        return queryWithFactory(cursorFactory, distinct, table, columns, selection,
                selectionArgs, groupBy, having, orderBy, limit, null);
    }

    /**
     * Query the given URL, returning a {@link Cursor} over the result set.
     *
     * @param cursorFactory the cursor factory to use, or null for the default factory
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor queryWithFactory(CursorFactory cursorFactory,
            boolean distinct, String table, String[] columns,
            String selection, String[] selectionArgs, String groupBy,
            String having, String orderBy, String limit, CancellationSignal cancellationSignal) {
        acquireReference();
        try {
            String sql = SQLiteQueryBuilder.buildQueryString(
                    distinct, table, columns, selection, groupBy, having, orderBy, limit);

            return rawQueryWithFactory(cursorFactory, sql, selectionArgs,
                    findEditTable(table), cancellationSignal);
        } finally {
            releaseReference();
        }
    }

    /**
     * Query the given table, returning a {@link Cursor} over the result set.
     *
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor query(String table, String[] columns, String selection,
            String[] selectionArgs, String groupBy, String having,
            String orderBy) {

        return query(false, table, columns, selection, selectionArgs, groupBy,
                having, orderBy, null /* limit */);
    }

    /**
     * Query the given table, returning a {@link Cursor} over the result set.
     *
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor query(String table, String[] columns, String selection,
            String[] selectionArgs, String groupBy, String having,
            String orderBy, String limit) {

        return query(false, table, columns, selection, selectionArgs, groupBy,
                having, orderBy, limit);
    }

    /**
     * Runs the provided SQL and returns a {@link Cursor} over the result set.
     *
     * @param sql the SQL query. The SQL string must not be ; terminated
     * @param selectionArgs You may include ?s in where clause in the query,
     *     which will be replaced by the values from selectionArgs. The
     *     values will be bound as Strings.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     */
    public Cursor rawQuery(String sql, String[] selectionArgs) {
        return rawQueryWithFactory(null, sql, selectionArgs, null, null);
    }

    /**
     * Runs the provided SQL and returns a {@link Cursor} over the result set.
     *
     * @param sql the SQL query. The SQL string must not be ; terminated
     * @param selectionArgs You may include ?s in where clause in the query,
     *     which will be replaced by the values from selectionArgs. The
     *     values will be bound as Strings.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     */
    public Cursor rawQuery(String sql, String[] selectionArgs,
            CancellationSignal cancellationSignal) {
        return rawQueryWithFactory(null, sql, selectionArgs, null, cancellationSignal);
    }

    /**
     * Runs the provided SQL and returns a cursor over the result set.
     *
     * @param cursorFactory the cursor factory to use, or null for the default factory
     * @param sql the SQL query. The SQL string must not be ; terminated
     * @param selectionArgs You may include ?s in where clause in the query,
     *     which will be replaced by the values from selectionArgs. The
     *     values will be bound as Strings.
     * @param editTable the name of the first table, which is editable
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     */
    public Cursor rawQueryWithFactory(
            CursorFactory cursorFactory, String sql, String[] selectionArgs,
            String editTable) {
        return rawQueryWithFactory(cursorFactory, sql, selectionArgs, editTable, null);
    }

    /**
     * Runs the provided SQL and returns a cursor over the result set.
     *
     * @param cursorFactory the cursor factory to use, or null for the default factory
     * @param sql the SQL query. The SQL string must not be ; terminated
     * @param selectionArgs You may include ?s in where clause in the query,
     *     which will be replaced by the values from selectionArgs. The
     *     values will be bound as Strings.
     * @param editTable the name of the first table, which is editable
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     */
    public Cursor rawQueryWithFactory(
            CursorFactory cursorFactory, String sql, String[] selectionArgs,
            String editTable, CancellationSignal cancellationSignal) {
        acquireReference();
        try {
            SQLiteCursorDriver driver = new SQLiteDirectCursorDriver(this, sql, editTable,
                    cancellationSignal);
            return driver.query(cursorFactory != null ? cursorFactory : mCursorFactory,
                    selectionArgs);
        } finally {
            releaseReference();
        }
    }

    /**
     * Convenience method for inserting a row into the database.
     *
     * @param table the table to insert the row into
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>values</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>values</code> is empty.
     * @param values this map contains the initial column values for the
     *            row. The keys should be the column names and the values the
     *            column values
     * @return the row ID of the newly inserted row, or -1 if an error occurred
     */
    public long insert(String table, String nullColumnHack, ContentValues values) {
        try {
            return insertWithOnConflict(table, nullColumnHack, values, CONFLICT_NONE);
        } catch (SQLException e) {
            Log.e(TAG, "Error inserting " + values, e);
            return -1;
        }
    }

    /**
     * Convenience method for inserting a row into the database.
     *
     * @param table the table to insert the row into
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>values</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>values</code> is empty.
     * @param values this map contains the initial column values for the
     *            row. The keys should be the column names and the values the
     *            column values
     * @throws SQLException
     * @return the row ID of the newly inserted row, or -1 if an error occurred
     */
    public long insertOrThrow(String table, String nullColumnHack, ContentValues values)
            throws SQLException {
        return insertWithOnConflict(table, nullColumnHack, values, CONFLICT_NONE);
    }

    /**
     * Convenience method for replacing a row in the database.
     *
     * @param table the table in which to replace the row
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>initialValues</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>initialValues</code> is empty.
     * @param initialValues this map contains the initial column values for
     *   the row.
     * @return the row ID of the newly inserted row, or -1 if an error occurred
     */
    public long replace(String table, String nullColumnHack, ContentValues initialValues) {
        try {
            return insertWithOnConflict(table, nullColumnHack, initialValues,
                    CONFLICT_REPLACE);
        } catch (SQLException e) {
            Log.e(TAG, "Error inserting " + initialValues, e);
            return -1;
        }
    }

    /**
     * Convenience method for replacing a row in the database.
     *
     * @param table the table in which to replace the row
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>initialValues</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>initialValues</code> is empty.
     * @param initialValues this map contains the initial column values for
     *   the row. The key
     * @throws SQLException
     * @return the row ID of the newly inserted row, or -1 if an error occurred
     */
    public long replaceOrThrow(String table, String nullColumnHack,
            ContentValues initialValues) throws SQLException {
        return insertWithOnConflict(table, nullColumnHack, initialValues,
                CONFLICT_REPLACE);
    }

    /**
     * General method for inserting a row into the database.
     *
     * @param table the table to insert the row into
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>initialValues</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>initialValues</code> is empty.
     * @param initialValues this map contains the initial column values for the
     *            row. The keys should be the column names and the values the
     *            column values
     * @param conflictAlgorithm for insert conflict resolver
     * @return the row ID of the newly inserted row
     * OR the primary key of the existing row if the input param 'conflictAlgorithm' =
     * {@link #CONFLICT_IGNORE}
     * OR -1 if any error
     */
    public long insertWithOnConflict(String table, String nullColumnHack,
            ContentValues initialValues, int conflictAlgorithm) {
        acquireReference();
        try {
            StringBuilder sql = new StringBuilder();
            sql.append("INSERT");
            sql.append(CONFLICT_VALUES[conflictAlgorithm]);
            sql.append(" INTO ");
            sql.append(table);
            sql.append('(');

            Object[] bindArgs = null;
            int size = (initialValues != null && initialValues.size() > 0)
                    ? initialValues.size() : 0;
            if (size > 0) {
                bindArgs = new Object[size];
                int i = 0;
                for (String colName : initialValues.keySet()) {
                    sql.append((i > 0) ? "," : "");
                    sql.append(colName);
                    bindArgs[i++] = initialValues.get(colName);
                }
                sql.append(')');
                sql.append(" VALUES (");
                for (i = 0; i < size; i++) {
                    sql.append((i > 0) ? ",?" : "?");
                }
            } else {
                sql.append(nullColumnHack + ") VALUES (NULL");
            }
            sql.append(')');

            SQLiteStatement statement = new SQLiteStatement(this, sql.toString(), bindArgs);
            try {
                return statement.executeInsert();
            } finally {
                statement.close();
            }
        } finally {
            releaseReference();
        }
    }

    /**
     * Convenience method for deleting rows in the database.
     *
     * @param table the table to delete from
     * @param whereClause the optional WHERE clause to apply when deleting.
     *            Passing null will delete all rows.
     * @param whereArgs You may include ?s in the where clause, which
     *            will be replaced by the values from whereArgs. The values
     *            will be bound as Strings.
     * @return the number of rows affected if a whereClause is passed in, 0
     *         otherwise. To remove all rows and get a count pass "1" as the
     *         whereClause.
     */
    public int delete(String table, String whereClause, String[] whereArgs) {
        acquireReference();
        try {
            SQLiteStatement statement =  new SQLiteStatement(this, "DELETE FROM " + table +
                    (!TextUtils.isEmpty(whereClause) ? " WHERE " + whereClause : ""), whereArgs);
            try {
                return statement.executeUpdateDelete();
            } finally {
                statement.close();
            }
        } finally {
            releaseReference();
        }
    }

    /**
     * Convenience method for updating rows in the database.
     *
     * @param table the table to update in
     * @param values a map from column names to new column values. null is a
     *            valid value that will be translated to NULL.
     * @param whereClause the optional WHERE clause to apply when updating.
     *            Passing null will update all rows.
     * @param whereArgs You may include ?s in the where clause, which
     *            will be replaced by the values from whereArgs. The values
     *            will be bound as Strings.
     * @return the number of rows affected
     */
    public int update(String table, ContentValues values, String whereClause, String[] whereArgs) {
        return updateWithOnConflict(table, values, whereClause, whereArgs, CONFLICT_NONE);
    }

    /**
     * Convenience method for updating rows in the database.
     *
     * @param table the table to update in
     * @param values a map from column names to new column values. null is a
     *            valid value that will be translated to NULL.
     * @param whereClause the optional WHERE clause to apply when updating.
     *            Passing null will update all rows.
     * @param whereArgs You may include ?s in the where clause, which
     *            will be replaced by the values from whereArgs. The values
     *            will be bound as Strings.
     * @param conflictAlgorithm for update conflict resolver
     * @return the number of rows affected
     */
    public int updateWithOnConflict(String table, ContentValues values,
            String whereClause, String[] whereArgs, int conflictAlgorithm) {
        if (values == null || values.size() == 0) {
            throw new IllegalArgumentException("Empty values");
        }

        acquireReference();
        try {
            StringBuilder sql = new StringBuilder(120);
            sql.append("UPDATE ");
            sql.append(CONFLICT_VALUES[conflictAlgorithm]);
            sql.append(table);
            sql.append(" SET ");

            // move all bind args to one array
            int setValuesSize = values.size();
            int bindArgsSize = (whereArgs == null) ? setValuesSize : (setValuesSize + whereArgs.length);
            Object[] bindArgs = new Object[bindArgsSize];
            int i = 0;
            for (String colName : values.keySet()) {
                sql.append((i > 0) ? "," : "");
                sql.append(colName);
                bindArgs[i++] = values.get(colName);
                sql.append("=?");
            }
            if (whereArgs != null) {
                for (i = setValuesSize; i < bindArgsSize; i++) {
                    bindArgs[i] = whereArgs[i - setValuesSize];
                }
            }
            if (!TextUtils.isEmpty(whereClause)) {
                sql.append(" WHERE ");
                sql.append(whereClause);
            }

            SQLiteStatement statement = new SQLiteStatement(this, sql.toString(), bindArgs);
            try {
                return statement.executeUpdateDelete();
            } finally {
                statement.close();
            }
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute a single SQL statement that is NOT a SELECT
     * or any other SQL statement that returns data.
     * <p>
     * It has no means to return any data (such as the number of affected rows).
     * Instead, you're encouraged to use {@link #insert(String, String, ContentValues)},
     * {@link #update(String, ContentValues, String, String[])}, et al, when possible.
     * </p>
     * <p>
     * When using {@link #enableWriteAheadLogging()}, journal_mode is
     * automatically managed by this class. So, do not set journal_mode
     * using "PRAGMA journal_mode'<value>" statement if your app is using
     * {@link #enableWriteAheadLogging()}
     * </p>
     *
     * @param sql the SQL statement to be executed. Multiple statements separated by semicolons are
     * not supported.
     * @throws SQLException if the SQL string is invalid
     */
    public void execSQL(String sql) throws SQLException {
        executeSql(sql, null);
    }

    /**
     * Execute a single SQL statement that is NOT a SELECT/INSERT/UPDATE/DELETE.
     * <p>
     * For INSERT statements, use any of the following instead.
     * <ul>
     *   <li>{@link #insert(String, String, ContentValues)}</li>
     *   <li>{@link #insertOrThrow(String, String, ContentValues)}</li>
     *   <li>{@link #insertWithOnConflict(String, String, ContentValues, int)}</li>
     * </ul>
     * <p>
     * For UPDATE statements, use any of the following instead.
     * <ul>
     *   <li>{@link #update(String, ContentValues, String, String[])}</li>
     *   <li>{@link #updateWithOnConflict(String, ContentValues, String, String[], int)}</li>
     * </ul>
     * <p>
     * For DELETE statements, use any of the following instead.
     * <ul>
     *   <li>{@link #delete(String, String, String[])}</li>
     * </ul>
     * <p>
     * For example, the following are good candidates for using this method:
     * <ul>
     *   <li>ALTER TABLE</li>
     *   <li>CREATE or DROP table / trigger / view / index / virtual table</li>
     *   <li>REINDEX</li>
     *   <li>RELEASE</li>
     *   <li>SAVEPOINT</li>
     *   <li>PRAGMA that returns no data</li>
     * </ul>
     * </p>
     * <p>
     * When using {@link #enableWriteAheadLogging()}, journal_mode is
     * automatically managed by this class. So, do not set journal_mode
     * using "PRAGMA journal_mode'<value>" statement if your app is using
     * {@link #enableWriteAheadLogging()}
     * </p>
     *
     * @param sql the SQL statement to be executed. Multiple statements separated by semicolons are
     * not supported.
     * @param bindArgs only byte[], String, Long and Double are supported in bindArgs.
     * @throws SQLException if the SQL string is invalid
     */
    public void execSQL(String sql, Object[] bindArgs) throws SQLException {
        if (bindArgs == null) {
            throw new IllegalArgumentException("Empty bindArgs");
        }
        executeSql(sql, bindArgs);
    }

    private int executeSql(String sql, Object[] bindArgs) throws SQLException {
        acquireReference();
        try {
            if (DatabaseUtils.getSqlStatementType(sql) == DatabaseUtils.STATEMENT_ATTACH) {
                boolean disableWal = false;
                synchronized (mLock) {
                    if (!mHasAttachedDbsLocked) {
                        mHasAttachedDbsLocked = true;
                        disableWal = true;
                    }
                }
                if (disableWal) {
                    disableWriteAheadLogging();
                }
            }

            SQLiteStatement statement = new SQLiteStatement(this, sql, bindArgs);
            try {
                return statement.executeUpdateDelete();
            } finally {
                statement.close();
            }
        } finally {
            releaseReference();
        }
    }

    /**
     * Returns true if the database is opened as read only.
     *
     * @return True if database is opened as read only.
     */
    public boolean isReadOnly() {
        synchronized (mLock) {
            return isReadOnlyLocked();
        }
    }

    private boolean isReadOnlyLocked() {
        return (mConfigurationLocked.openFlags & OPEN_READ_MASK) == OPEN_READONLY;
    }

    /**
     * Returns true if the database is in-memory db.
     *
     * @return True if the database is in-memory.
     * @hide
     */
    public boolean isInMemoryDatabase() {
        synchronized (mLock) {
            return mConfigurationLocked.isInMemoryDb();
        }
    }

    /**
     * Returns true if the database is currently open.
     *
     * @return True if the database is currently open (has not been closed).
     */
    public boolean isOpen() {
        synchronized (mLock) {
            return mConnectionPoolLocked != null;
        }
    }

    /**
     * Returns true if the new version code is greater than the current database version.
     *
     * @param newVersion The new version code.
     * @return True if the new version code is greater than the current database version. 
     */
    public boolean needUpgrade(int newVersion) {
        return newVersion > getVersion();
    }

    /**
     * Gets the path to the database file.
     *
     * @return The path to the database file.
     */
    public final String getPath() {
        synchronized (mLock) {
            return mConfigurationLocked.path;
        }
    }

    /**
     * Sets the locale for this database.  Does nothing if this database has
     * the {@link #NO_LOCALIZED_COLLATORS} flag set or was opened read only.
     *
     * @param locale The new locale.
     *
     * @throws SQLException if the locale could not be set.  The most common reason
     * for this is that there is no collator available for the locale you requested.
     * In this case the database remains unchanged.
     */
    public void setLocale(Locale locale) {
        if (locale == null) {
            throw new IllegalArgumentException("locale must not be null.");
        }

        synchronized (mLock) {
            throwIfNotOpenLocked();

            final Locale oldLocale = mConfigurationLocked.locale;
            mConfigurationLocked.locale = locale;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.locale = oldLocale;
                throw ex;
            }
        }
    }

    /**
     * Sets the maximum size of the prepared-statement cache for this database.
     * (size of the cache = number of compiled-sql-statements stored in the cache).
     *<p>
     * Maximum cache size can ONLY be increased from its current size (default = 10).
     * If this method is called with smaller size than the current maximum value,
     * then IllegalStateException is thrown.
     *<p>
     * This method is thread-safe.
     *
     * @param cacheSize the size of the cache. can be (0 to {@link #MAX_SQL_CACHE_SIZE})
     * @throws IllegalStateException if input cacheSize > {@link #MAX_SQL_CACHE_SIZE}.
     */
    public void setMaxSqlCacheSize(int cacheSize) {
        if (cacheSize > MAX_SQL_CACHE_SIZE || cacheSize < 0) {
            throw new IllegalStateException(
                    "expected value between 0 and " + MAX_SQL_CACHE_SIZE);
        }

        synchronized (mLock) {
            throwIfNotOpenLocked();

            final int oldMaxSqlCacheSize = mConfigurationLocked.maxSqlCacheSize;
            mConfigurationLocked.maxSqlCacheSize = cacheSize;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.maxSqlCacheSize = oldMaxSqlCacheSize;
                throw ex;
            }
        }
    }

    /**
     * Sets whether foreign key constraints are enabled for the database.
     * <p>
     * By default, foreign key constraints are not enforced by the database.
     * This method allows an application to enable foreign key constraints.
     * It must be called each time the database is opened to ensure that foreign
     * key constraints are enabled for the session.
     * </p><p>
     * A good time to call this method is right after calling {@link #openOrCreateDatabase}
     * or in the {@link SQLiteOpenHelper#onConfigure} callback.
     * </p><p>
     * When foreign key constraints are disabled, the database does not check whether
     * changes to the database will violate foreign key constraints.  Likewise, when
     * foreign key constraints are disabled, the database will not execute cascade
     * delete or update triggers.  As a result, it is possible for the database
     * state to become inconsistent.  To perform a database integrity check,
     * call {@link #isDatabaseIntegrityOk}.
     * </p><p>
     * This method must not be called while a transaction is in progress.
     * </p><p>
     * See also <a href="http://sqlite.org/foreignkeys.html">SQLite Foreign Key Constraints</a>
     * for more details about foreign key constraint support.
     * </p>
     *
     * @param enable True to enable foreign key constraints, false to disable them.
     *
     * @throws IllegalStateException if the are transactions is in progress
     * when this method is called.
     */
    public void setForeignKeyConstraintsEnabled(boolean enable) {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            if (mConfigurationLocked.foreignKeyConstraintsEnabled == enable) {
                return;
            }

            mConfigurationLocked.foreignKeyConstraintsEnabled = enable;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.foreignKeyConstraintsEnabled = !enable;
                throw ex;
            }
        }
    }

    /**
     * This method enables parallel execution of queries from multiple threads on the
     * same database.  It does this by opening multiple connections to the database
     * and using a different database connection for each query.  The database
     * journal mode is also changed to enable writes to proceed concurrently with reads.
     * <p>
     * When write-ahead logging is not enabled (the default), it is not possible for
     * reads and writes to occur on the database at the same time.  Before modifying the
     * database, the writer implicitly acquires an exclusive lock on the database which
     * prevents readers from accessing the database until the write is completed.
     * </p><p>
     * In contrast, when write-ahead logging is enabled (by calling this method), write
     * operations occur in a separate log file which allows reads to proceed concurrently.
     * While a write is in progress, readers on other threads will perceive the state
     * of the database as it was before the write began.  When the write completes, readers
     * on other threads will then perceive the new state of the database.
     * </p><p>
     * It is a good idea to enable write-ahead logging whenever a database will be
     * concurrently accessed and modified by multiple threads at the same time.
     * However, write-ahead logging uses significantly more memory than ordinary
     * journaling because there are multiple connections to the same database.
     * So if a database will only be used by a single thread, or if optimizing
     * concurrency is not very important, then write-ahead logging should be disabled.
     * </p><p>
     * After calling this method, execution of queries in parallel is enabled as long as
     * the database remains open.  To disable execution of queries in parallel, either
     * call {@link #disableWriteAheadLogging} or close the database and reopen it.
     * </p><p>
     * The maximum number of connections used to execute queries in parallel is
     * dependent upon the device memory and possibly other properties.
     * </p><p>
     * If a query is part of a transaction, then it is executed on the same database handle the
     * transaction was begun.
     * </p><p>
     * Writers should use {@link #beginTransactionNonExclusive()} or
     * {@link #beginTransactionWithListenerNonExclusive(SQLiteTransactionListener)}
     * to start a transaction.  Non-exclusive mode allows database file to be in readable
     * by other threads executing queries.
     * </p><p>
     * If the database has any attached databases, then execution of queries in parallel is NOT
     * possible.  Likewise, write-ahead logging is not supported for read-only databases
     * or memory databases.  In such cases, {@link #enableWriteAheadLogging} returns false.
     * </p><p>
     * The best way to enable write-ahead logging is to pass the
     * {@link #ENABLE_WRITE_AHEAD_LOGGING} flag to {@link #openDatabase}.  This is
     * more efficient than calling {@link #enableWriteAheadLogging}.
     * <code><pre>
     *     SQLiteDatabase db = SQLiteDatabase.openDatabase("db_filename", cursorFactory,
     *             SQLiteDatabase.CREATE_IF_NECESSARY | SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING,
     *             myDatabaseErrorHandler);
     *     db.enableWriteAheadLogging();
     * </pre></code>
     * </p><p>
     * Another way to enable write-ahead logging is to call {@link #enableWriteAheadLogging}
     * after opening the database.
     * <code><pre>
     *     SQLiteDatabase db = SQLiteDatabase.openDatabase("db_filename", cursorFactory,
     *             SQLiteDatabase.CREATE_IF_NECESSARY, myDatabaseErrorHandler);
     *     db.enableWriteAheadLogging();
     * </pre></code>
     * </p><p>
     * See also <a href="http://sqlite.org/wal.html">SQLite Write-Ahead Logging</a> for
     * more details about how write-ahead logging works.
     * </p>
     *
     * @return True if write-ahead logging is enabled.
     *
     * @throws IllegalStateException if there are transactions in progress at the
     * time this method is called.  WAL mode can only be changed when there are no
     * transactions in progress.
     *
     * @see #ENABLE_WRITE_AHEAD_LOGGING
     * @see #disableWriteAheadLogging
     */
    public boolean enableWriteAheadLogging() {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            if ((mConfigurationLocked.openFlags & ENABLE_WRITE_AHEAD_LOGGING) != 0) {
                return true;
            }

            if (isReadOnlyLocked()) {
                // WAL doesn't make sense for readonly-databases.
                // TODO: True, but connection pooling does still make sense...
                return false;
            }

            if (mConfigurationLocked.isInMemoryDb()) {
                Log.i(TAG, "can't enable WAL for memory databases.");
                return false;
            }

            // make sure this database has NO attached databases because sqlite's write-ahead-logging
            // doesn't work for databases with attached databases
            if (mHasAttachedDbsLocked) {
                if (Log.isLoggable(TAG, Log.DEBUG)) {
                    Log.d(TAG, "this database: " + mConfigurationLocked.label
                            + " has attached databases. can't  enable WAL.");
                }
                return false;
            }

            mConfigurationLocked.openFlags |= ENABLE_WRITE_AHEAD_LOGGING;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.openFlags &= ~ENABLE_WRITE_AHEAD_LOGGING;
                throw ex;
            }
        }
        return true;
    }

    /**
     * This method disables the features enabled by {@link #enableWriteAheadLogging()}.
     *
     * @throws IllegalStateException if there are transactions in progress at the
     * time this method is called.  WAL mode can only be changed when there are no
     * transactions in progress.
     *
     * @see #enableWriteAheadLogging
     */
    public void disableWriteAheadLogging() {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            if ((mConfigurationLocked.openFlags & ENABLE_WRITE_AHEAD_LOGGING) == 0) {
                return;
            }

            mConfigurationLocked.openFlags &= ~ENABLE_WRITE_AHEAD_LOGGING;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.openFlags |= ENABLE_WRITE_AHEAD_LOGGING;
                throw ex;
            }
        }
    }

    /**
     * Returns true if write-ahead logging has been enabled for this database.
     *
     * @return True if write-ahead logging has been enabled for this database.
     *
     * @see #enableWriteAheadLogging
     * @see #ENABLE_WRITE_AHEAD_LOGGING
     */
    public boolean isWriteAheadLoggingEnabled() {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            return (mConfigurationLocked.openFlags & ENABLE_WRITE_AHEAD_LOGGING) != 0;
        }
    }

    /**
     * Collect statistics about all open databases in the current process.
     * Used by bug report.
     */
    static ArrayList<DbStats> getDbStats() {
        ArrayList<DbStats> dbStatsList = new ArrayList<DbStats>();
        for (SQLiteDatabase db : getActiveDatabases()) {
            db.collectDbStats(dbStatsList);
        }
        return dbStatsList;
    }

    private void collectDbStats(ArrayList<DbStats> dbStatsList) {
        synchronized (mLock) {
            if (mConnectionPoolLocked != null) {
                mConnectionPoolLocked.collectDbStats(dbStatsList);
            }
        }
    }

    private static ArrayList<SQLiteDatabase> getActiveDatabases() {
        ArrayList<SQLiteDatabase> databases = new ArrayList<SQLiteDatabase>();
        synchronized (sActiveDatabases) {
            databases.addAll(sActiveDatabases.keySet());
        }
        return databases;
    }

    /**
     * Dump detailed information about all open databases in the current process.
     * Used by bug report.
     */
    static void dumpAll(Printer printer, boolean verbose) {
        for (SQLiteDatabase db : getActiveDatabases()) {
            db.dump(printer, verbose);
        }
    }

    private void dump(Printer printer, boolean verbose) {
        synchronized (mLock) {
            if (mConnectionPoolLocked != null) {
                printer.println("");
                mConnectionPoolLocked.dump(printer, verbose);
            }
        }
    }

    /**
     * Returns list of full pathnames of all attached databases including the main database
     * by executing 'pragma database_list' on the database.
     *
     * @return ArrayList of pairs of (database name, database file path) or null if the database
     * is not open.
     */
    public List<Pair<String, String>> getAttachedDbs() {
        ArrayList<Pair<String, String>> attachedDbs = new ArrayList<Pair<String, String>>();
        synchronized (mLock) {
            if (mConnectionPoolLocked == null) {
                return null; // not open
            }

            if (!mHasAttachedDbsLocked) {
                // No attached databases.
                // There is a small window where attached databases exist but this flag is not
                // set yet.  This can occur when this thread is in a race condition with another
                // thread that is executing the SQL statement: "attach database <blah> as <foo>"
                // If this thread is NOT ok with such a race condition (and thus possibly not
                // receivethe entire list of attached databases), then the caller should ensure
                // that no thread is executing any SQL statements while a thread is calling this
                // method.  Typically, this method is called when 'adb bugreport' is done or the
                // caller wants to collect stats on the database and all its attached databases.
                attachedDbs.add(new Pair<String, String>("main", mConfigurationLocked.path));
                return attachedDbs;
            }

            acquireReference();
        }

        try {
            // has attached databases. query sqlite to get the list of attached databases.
            Cursor c = null;
            try {
                c = rawQuery("pragma database_list;", null);
                while (c.moveToNext()) {
                    // sqlite returns a row for each database in the returned list of databases.
                    //   in each row,
                    //       1st column is the database name such as main, or the database
                    //                              name specified on the "ATTACH" command
                    //       2nd column is the database file path.
                    attachedDbs.add(new Pair<String, String>(c.getString(1), c.getString(2)));
                }
            } finally {
                if (c != null) {
                    c.close();
                }
            }
            return attachedDbs;
        } finally {
            releaseReference();
        }
    }

    /**
     * Runs 'pragma integrity_check' on the given database (and all the attached databases)
     * and returns true if the given database (and all its attached databases) pass integrity_check,
     * false otherwise.
     *<p>
     * If the result is false, then this method logs the errors reported by the integrity_check
     * command execution.
     *<p>
     * Note that 'pragma integrity_check' on a database can take a long time.
     *
     * @return true if the given database (and all its attached databases) pass integrity_check,
     * false otherwise.
     */
    public boolean isDatabaseIntegrityOk() {
        acquireReference();
        try {
            List<Pair<String, String>> attachedDbs = null;
            try {
                attachedDbs = getAttachedDbs();
                if (attachedDbs == null) {
                    throw new IllegalStateException("databaselist for: " + getPath() + " couldn't " +
                            "be retrieved. probably because the database is closed");
                }
            } catch (SQLiteException e) {
                // can't get attachedDb list. do integrity check on the main database
                attachedDbs = new ArrayList<Pair<String, String>>();
                attachedDbs.add(new Pair<String, String>("main", getPath()));
            }

            for (int i = 0; i < attachedDbs.size(); i++) {
                Pair<String, String> p = attachedDbs.get(i);
                SQLiteStatement prog = null;
                try {
                    prog = compileStatement("PRAGMA " + p.first + ".integrity_check(1);");
                    String rslt = prog.simpleQueryForString();
                    if (!rslt.equalsIgnoreCase("ok")) {
                        // integrity_checker failed on main or attached databases
                        Log.e(TAG, "PRAGMA integrity_check on " + p.second + " returned: " + rslt);
                        return false;
                    }
                } finally {
                    if (prog != null) prog.close();
                }
            }
        } finally {
            releaseReference();
        }
        return true;
    }

    @Override
    public String toString() {
        return "SQLiteDatabase: " + getPath();
    }

    private void throwIfNotOpenLocked() {
        if (mConnectionPoolLocked == null) {
            throw new IllegalStateException("The database '" + mConfigurationLocked.label
                    + "' is not open.");
        }
    }

    /**
     * Used to allow returning sub-classes of {@link Cursor} when calling query.
     */
    public interface CursorFactory {
        /**
         * See {@link SQLiteCursor#SQLiteCursor(SQLiteCursorDriver, String, SQLiteQuery)}.
         */
        public Cursor newCursor(SQLiteDatabase db,
                SQLiteCursorDriver masterQuery, String editTable,
                SQLiteQuery query);
    }

    /**
     * A callback interface for a custom sqlite3 function.
     * This can be used to create a function that can be called from
     * sqlite3 database triggers.
     * @hide
     */
    public interface CustomFunction {
        public void callback(String[] args);
    }

    public static boolean hasCodec() {
      return SQLiteConnection.hasCodec();
    }

    public void enableLocalizedCollators() {
      mConnectionPoolLocked.enableLocalizedCollators();
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteDatabaseConfiguration.java.















































































































































































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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import java.util.ArrayList;
import java.util.Locale;
import java.util.regex.Pattern;

/**
 * Describes how to configure a database.
 * <p>
 * The purpose of this object is to keep track of all of the little
 * configuration settings that are applied to a database after it
 * is opened so that they can be applied to all connections in the
 * connection pool uniformly.
 * </p><p>
 * Each connection maintains its own copy of this object so it can
 * keep track of which settings have already been applied.
 * </p>
 *
 * @hide
 */
public final class SQLiteDatabaseConfiguration {
    // The pattern we use to strip email addresses from database paths
    // when constructing a label to use in log messages.
    private static final Pattern EMAIL_IN_DB_PATTERN =
            Pattern.compile("[\\w\\.\\-]+@[\\w\\.\\-]+");

    /**
     * Special path used by in-memory databases.
     */
    public static final String MEMORY_DB_PATH = ":memory:";

    /**
     * The database path.
     */
    public final String path;

    /**
     * The label to use to describe the database when it appears in logs.
     * This is derived from the path but is stripped to remove PII.
     */
    public final String label;

    /**
     * The flags used to open the database.
     */
    public int openFlags;

    /**
     * The maximum size of the prepared statement cache for each database connection.
     * Must be non-negative.
     *
     * Default is 25.
     */
    public int maxSqlCacheSize;

    /**
     * The database locale.
     *
     * Default is the value returned by {@link Locale#getDefault()}.
     */
    public Locale locale;

    /**
     * True if foreign key constraints are enabled.
     *
     * Default is false.
     */
    public boolean foreignKeyConstraintsEnabled;

    /**
     * The custom functions to register.
     */
    public final ArrayList<SQLiteCustomFunction> customFunctions =
            new ArrayList<SQLiteCustomFunction>();

    /**
     * Creates a database configuration with the required parameters for opening a
     * database and default values for all other parameters.
     *
     * @param path The database path.
     * @param openFlags Open flags for the database, such as {@link SQLiteDatabase#OPEN_READWRITE}.
     */
    public SQLiteDatabaseConfiguration(String path, int openFlags) {
        if (path == null) {
            throw new IllegalArgumentException("path must not be null.");
        }

        this.path = path;
        label = stripPathForLogs(path);
        this.openFlags = openFlags;

        // Set default values for optional parameters.
        maxSqlCacheSize = 25;
        locale = Locale.getDefault();
    }

    /**
     * Creates a database configuration as a copy of another configuration.
     *
     * @param other The other configuration.
     */
    public SQLiteDatabaseConfiguration(SQLiteDatabaseConfiguration other) {
        if (other == null) {
            throw new IllegalArgumentException("other must not be null.");
        }

        this.path = other.path;
        this.label = other.label;
        updateParametersFrom(other);
    }

    /**
     * Updates the non-immutable parameters of this configuration object
     * from the other configuration object.
     *
     * @param other The object from which to copy the parameters.
     */
    public void updateParametersFrom(SQLiteDatabaseConfiguration other) {
        if (other == null) {
            throw new IllegalArgumentException("other must not be null.");
        }
        if (!path.equals(other.path)) {
            throw new IllegalArgumentException("other configuration must refer to "
                    + "the same database.");
        }

        openFlags = other.openFlags;
        maxSqlCacheSize = other.maxSqlCacheSize;
        locale = other.locale;
        foreignKeyConstraintsEnabled = other.foreignKeyConstraintsEnabled;
        customFunctions.clear();
        customFunctions.addAll(other.customFunctions);
    }

    /**
     * Returns true if the database is in-memory.
     * @return True if the database is in-memory.
     */
    public boolean isInMemoryDb() {
        return path.equalsIgnoreCase(MEMORY_DB_PATH);
    }

    private static String stripPathForLogs(String path) {
        if (path.indexOf('@') == -1) {
            return path;
        }
        return EMAIL_IN_DB_PATTERN.matcher(path).replaceAll("XX@YY");
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteDatabaseCorruptException.java.






































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that the SQLite database file is corrupt.
 */
public class SQLiteDatabaseCorruptException extends SQLiteException {
    public SQLiteDatabaseCorruptException() {}

    public SQLiteDatabaseCorruptException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteDatabaseLockedException.java.











































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * Thrown if  the database engine was unable to acquire the
 * database locks it needs to do its job.  If the statement is a [COMMIT]
 * or occurs outside of an explicit transaction, then you can retry the
 * statement.  If the statement is not a [COMMIT] and occurs within a
 * explicit transaction then you should rollback the transaction before
 * continuing.
 */
public class SQLiteDatabaseLockedException extends SQLiteException {
    public SQLiteDatabaseLockedException() {}

    public SQLiteDatabaseLockedException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteDatatypeMismatchException.java.



































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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

public class SQLiteDatatypeMismatchException extends SQLiteException {
    public SQLiteDatatypeMismatchException() {}

    public SQLiteDatatypeMismatchException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteDebug.java.






















































































































































































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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import java.util.ArrayList;

import android.os.Build;
/* import android.os.SystemProperties; */
import android.util.Log;
import android.util.Printer;

/**
 * Provides debugging info about all SQLite databases running in the current process.
 *
 * {@hide}
 */
public final class SQLiteDebug {
    private static native void nativeGetPagerStats(PagerStats stats);

    /**
     * Controls the printing of informational SQL log messages.
     *
     * Enable using "adb shell setprop log.tag.SQLiteLog VERBOSE".
     */
    public static final boolean DEBUG_SQL_LOG =
            Log.isLoggable("SQLiteLog", Log.VERBOSE);

    /**
     * Controls the printing of SQL statements as they are executed.
     *
     * Enable using "adb shell setprop log.tag.SQLiteStatements VERBOSE".
     */
    public static final boolean DEBUG_SQL_STATEMENTS =
            Log.isLoggable("SQLiteStatements", Log.VERBOSE);

    /**
     * Controls the printing of wall-clock time taken to execute SQL statements
     * as they are executed.
     *
     * Enable using "adb shell setprop log.tag.SQLiteTime VERBOSE".
     */
    public static final boolean DEBUG_SQL_TIME =
            Log.isLoggable("SQLiteTime", Log.VERBOSE);

    /**
     * True to enable database performance testing instrumentation.
     * @hide
     */
    public static final boolean DEBUG_LOG_SLOW_QUERIES = false;

    private SQLiteDebug() {
    }

    /**
     * Determines whether a query should be logged.
     *
     * Reads the "db.log.slow_query_threshold" system property, which can be changed
     * by the user at any time.  If the value is zero, then all queries will
     * be considered slow.  If the value does not exist or is negative, then no queries will
     * be considered slow.
     *
     * This value can be changed dynamically while the system is running.
     * For example, "adb shell setprop db.log.slow_query_threshold 200" will
     * log all queries that take 200ms or longer to run.
     * @hide
     */
    public static final boolean shouldLogSlowQuery(long elapsedTimeMillis) {
        int slowQueryMillis = 10000;
        return slowQueryMillis >= 0 && elapsedTimeMillis >= slowQueryMillis;
    }

    /**
     * Contains statistics about the active pagers in the current process.
     *
     * @see #nativeGetPagerStats(PagerStats)
     */
    public static class PagerStats {
        /** the current amount of memory checked out by sqlite using sqlite3_malloc().
         * documented at http://www.sqlite.org/c3ref/c_status_malloc_size.html
         */
        public int memoryUsed;

        /** the number of bytes of page cache allocation which could not be sattisfied by the
         * SQLITE_CONFIG_PAGECACHE buffer and where forced to overflow to sqlite3_malloc().
         * The returned value includes allocations that overflowed because they where too large
         * (they were larger than the "sz" parameter to SQLITE_CONFIG_PAGECACHE) and allocations
         * that overflowed because no space was left in the page cache.
         * documented at http://www.sqlite.org/c3ref/c_status_malloc_size.html
         */
        public int pageCacheOverflow;

        /** records the largest memory allocation request handed to sqlite3.
         * documented at http://www.sqlite.org/c3ref/c_status_malloc_size.html
         */
        public int largestMemAlloc;

        /** a list of {@link DbStats} - one for each main database opened by the applications
         * running on the android device
         */
        public ArrayList<DbStats> dbStats;
    }

    /**
     * contains statistics about a database
     */
    public static class DbStats {
        /** name of the database */
        public String dbName;

        /** the page size for the database */
        public long pageSize;

        /** the database size */
        public long dbSize;

        /** documented here http://www.sqlite.org/c3ref/c_dbstatus_lookaside_used.html */
        public int lookaside;

        /** statement cache stats: hits/misses/cachesize */
        public String cache;

        public DbStats(String dbName, long pageCount, long pageSize, int lookaside,
            int hits, int misses, int cachesize) {
            this.dbName = dbName;
            this.pageSize = pageSize / 1024;
            dbSize = (pageCount * pageSize) / 1024;
            this.lookaside = lookaside;
            this.cache = hits + "/" + misses + "/" + cachesize;
        }
    }

    /**
     * return all pager and database stats for the current process.
     * @return {@link PagerStats}
     */
    public static PagerStats getDatabaseInfo() {
        PagerStats stats = new PagerStats();
        nativeGetPagerStats(stats);
        stats.dbStats = SQLiteDatabase.getDbStats();
        return stats;
    }

    /**
     * Dumps detailed information about all databases used by the process.
     * @param printer The printer for dumping database state.
     * @param args Command-line arguments supplied to dumpsys dbinfo
     */
    public static void dump(Printer printer, String[] args) {
        boolean verbose = false;
        for (String arg : args) {
            if (arg.equals("-v")) {
                verbose = true;
            }
        }

        SQLiteDatabase.dumpAll(printer, verbose);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteDirectCursorDriver.java.





























































































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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.database.Cursor;
import org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory;
import android.os.CancellationSignal;

/**
 * A cursor driver that uses the given query directly.
 * 
 * @hide
 */
public final class SQLiteDirectCursorDriver implements SQLiteCursorDriver {
    private final SQLiteDatabase mDatabase;
    private final String mEditTable; 
    private final String mSql;
    private final CancellationSignal mCancellationSignal;
    private SQLiteQuery mQuery;

    public SQLiteDirectCursorDriver(SQLiteDatabase db, String sql, String editTable,
            CancellationSignal cancellationSignal) {
        mDatabase = db;
        mEditTable = editTable;
        mSql = sql;
        mCancellationSignal = cancellationSignal;
    }

    public Cursor query(CursorFactory factory, String[] selectionArgs) {
        final SQLiteQuery query = new SQLiteQuery(mDatabase, mSql, mCancellationSignal);
        final Cursor cursor;
        try {
            query.bindAllArgsAsStrings(selectionArgs);

            if (factory == null) {
                cursor = new SQLiteCursor(this, mEditTable, query);
            } else {
                cursor = factory.newCursor(mDatabase, this, mEditTable, query);
            }
        } catch (RuntimeException ex) {
            query.close();
            throw ex;
        }

        mQuery = query;
        return cursor;
    }

    public void cursorClosed() {
        // Do nothing
    }

    public void setBindArguments(String[] bindArgs) {
        mQuery.bindAllArgsAsStrings(bindArgs);
    }

    public void cursorDeactivated() {
        // Do nothing
    }

    public void cursorRequeried(Cursor cursor) {
        // Do nothing
    }

    @Override
    public String toString() {
        return "SQLiteDirectCursorDriver: " + mSql;
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteDiskIOException.java.







































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that an IO error occured while accessing the 
 * SQLite database file.
 */
public class SQLiteDiskIOException extends SQLiteException {
    public SQLiteDiskIOException() {}

    public SQLiteDiskIOException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteDoneException.java.









































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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that the SQLite program is done.
 * Thrown when an operation that expects a row (such as {@link
 * SQLiteStatement#simpleQueryForString} or {@link
 * SQLiteStatement#simpleQueryForLong}) does not get one.
 */
public class SQLiteDoneException extends SQLiteException {
    public SQLiteDoneException() {}

    public SQLiteDoneException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteException.java.













































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import org.sqlite.database.SQLException;

/**
 * A SQLite exception that indicates there was an error with SQL parsing or execution.
 */
public class SQLiteException extends SQLException {
    public SQLiteException() {
    }

    public SQLiteException(String error) {
        super(error);
    }

    public SQLiteException(String error, Throwable cause) {
        super(error, cause);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteFullException.java.






































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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that the SQLite database is full.
 */
public class SQLiteFullException extends SQLiteException {
    public SQLiteFullException() {}

    public SQLiteFullException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteGlobal.java.



























































































































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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.content.res.Resources;
import android.os.StatFs;
/* import android.os.SystemProperties; */

/**
 * Provides access to SQLite functions that affect all database connection,
 * such as memory management.
 *
 * The native code associated with SQLiteGlobal is also sets global configuration options
 * using sqlite3_config() then calls sqlite3_initialize() to ensure that the SQLite
 * library is properly initialized exactly once before any other framework or application
 * code has a chance to run.
 *
 * Verbose SQLite logging is enabled if the "log.tag.SQLiteLog" property is set to "V".
 * (per {@link SQLiteDebug#DEBUG_SQL_LOG}).
 *
 * @hide
 */
public final class SQLiteGlobal {
    private static final String TAG = "SQLiteGlobal";

    private static final Object sLock = new Object();
    private static int sDefaultPageSize;

    private static native int nativeReleaseMemory();

    private SQLiteGlobal() {
    }

    /**
     * Attempts to release memory by pruning the SQLite page cache and other
     * internal data structures.
     *
     * @return The number of bytes that were freed.
     */
    public static int releaseMemory() {
        return nativeReleaseMemory();
    }

    /**
     * Gets the default page size to use when creating a database.
     */
    public static int getDefaultPageSize() {
        synchronized (sLock) {
            if (sDefaultPageSize == 0) {
                sDefaultPageSize = new StatFs("/data").getBlockSize();
            }
            return 1024;
        }
    }

    /**
     * Gets the default journal mode when WAL is not in use.
     */
    public static String getDefaultJournalMode() {
        return "delete";
    }

    /**
     * Gets the journal size limit in bytes.
     */
    public static int getJournalSizeLimit() {
        return 10000;
    }

    /**
     * Gets the default database synchronization mode when WAL is not in use.
     */
    public static String getDefaultSyncMode() {
        return "normal";
    }

    /**
     * Gets the database synchronization mode when in WAL mode.
     */
    public static String getWALSyncMode() {
        return "normal";
    }

    /**
     * Gets the WAL auto-checkpoint integer in database pages.
     */
    public static int getWALAutoCheckpoint() {
        int value = 1000;
        return Math.max(1, value);
    }

    /**
     * Gets the connection pool size when in WAL mode.
     */
    public static int getWALConnectionPoolSize() {
        int value = 10;
        return Math.max(2, value);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteMisuseException.java.















































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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * This error can occur if the application creates a SQLiteStatement object and allows multiple
 * threads in the application use it at the same time.
 * Sqlite returns this error if bind and execute methods on this object occur at the same time
 * from multiple threads, like so:
 *     thread # 1: in execute() method of the SQLiteStatement object
 *     while thread # 2: is in bind..() on the same object.
 *</p>
 * FIX this by NEVER sharing the same SQLiteStatement object between threads.
 * Create a local instance of the SQLiteStatement whenever it is needed, use it and close it ASAP.
 * NEVER make it globally available.
 */
public class SQLiteMisuseException extends SQLiteException {
    public SQLiteMisuseException() {}

    public SQLiteMisuseException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteOpenHelper.java.





































































































































































































































































































































































































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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.content.Context;
import org.sqlite.database.DatabaseErrorHandler;
import org.sqlite.database.DefaultDatabaseErrorHandler;
import org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory;
import android.util.Log;

/**
 * A helper class to manage database creation and version management.
 *
 * <p>You create a subclass implementing {@link #onCreate}, {@link #onUpgrade} and
 * optionally {@link #onOpen}, and this class takes care of opening the database
 * if it exists, creating it if it does not, and upgrading it as necessary.
 * Transactions are used to make sure the database is always in a sensible state.
 *
 * <p>This class makes it easy for {@link android.content.ContentProvider}
 * implementations to defer opening and upgrading the database until first use,
 * to avoid blocking application startup with long-running database upgrades.
 *
 * <p>For an example, see the NotePadProvider class in the NotePad sample application,
 * in the <em>samples/</em> directory of the SDK.</p>
 *
 * <p class="note"><strong>Note:</strong> this class assumes
 * monotonically increasing version numbers for upgrades.</p>
 */
public abstract class SQLiteOpenHelper {
    private static final String TAG = SQLiteOpenHelper.class.getSimpleName();

    // When true, getReadableDatabase returns a read-only database if it is just being opened.
    // The database handle is reopened in read/write mode when getWritableDatabase is called.
    // We leave this behavior disabled in production because it is inefficient and breaks
    // many applications.  For debugging purposes it can be useful to turn on strict
    // read-only semantics to catch applications that call getReadableDatabase when they really
    // wanted getWritableDatabase.
    private static final boolean DEBUG_STRICT_READONLY = false;

    private final Context mContext;
    private final String mName;
    private final CursorFactory mFactory;
    private final int mNewVersion;

    private SQLiteDatabase mDatabase;
    private boolean mIsInitializing;
    private boolean mEnableWriteAheadLogging;
    private final DatabaseErrorHandler mErrorHandler;

    /**
     * Create a helper object to create, open, and/or manage a database.
     * This method always returns very quickly.  The database is not actually
     * created or opened until one of {@link #getWritableDatabase} or
     * {@link #getReadableDatabase} is called.
     *
     * @param context to use to open or create the database
     * @param name of the database file, or null for an in-memory database
     * @param factory to use for creating cursor objects, or null for the default
     * @param version number of the database (starting at 1); if the database is older,
     *     {@link #onUpgrade} will be used to upgrade the database; if the database is
     *     newer, {@link #onDowngrade} will be used to downgrade the database
     */
    public SQLiteOpenHelper(Context context, String name, CursorFactory factory, int version) {
        this(context, name, factory, version, null);
    }

    /**
     * Create a helper object to create, open, and/or manage a database.
     * The database is not actually created or opened until one of
     * {@link #getWritableDatabase} or {@link #getReadableDatabase} is called.
     *
     * <p>Accepts input param: a concrete instance of {@link DatabaseErrorHandler} to be
     * used to handle corruption when sqlite reports database corruption.</p>
     *
     * @param context to use to open or create the database
     * @param name of the database file, or null for an in-memory database
     * @param factory to use for creating cursor objects, or null for the default
     * @param version number of the database (starting at 1); if the database is older,
     *     {@link #onUpgrade} will be used to upgrade the database; if the database is
     *     newer, {@link #onDowngrade} will be used to downgrade the database
     * @param errorHandler the {@link DatabaseErrorHandler} to be used when sqlite reports database
     * corruption, or null to use the default error handler.
     */
    public SQLiteOpenHelper(Context context, String name, CursorFactory factory, int version,
            DatabaseErrorHandler errorHandler) {
        if (version < 1) throw new IllegalArgumentException("Version must be >= 1, was " + version);

        mContext = context;
        mName = name;
        mFactory = factory;
        mNewVersion = version;
        mErrorHandler = errorHandler;
    }

    /**
     * Return the name of the SQLite database being opened, as given to
     * the constructor.
     */
    public String getDatabaseName() {
        return mName;
    }

    /**
     * Enables or disables the use of write-ahead logging for the database.
     *
     * Write-ahead logging cannot be used with read-only databases so the value of
     * this flag is ignored if the database is opened read-only.
     *
     * @param enabled True if write-ahead logging should be enabled, false if it
     * should be disabled.
     *
     * @see SQLiteDatabase#enableWriteAheadLogging()
     */
    public void setWriteAheadLoggingEnabled(boolean enabled) {
        synchronized (this) {
            if (mEnableWriteAheadLogging != enabled) {
                if (mDatabase != null && mDatabase.isOpen() && !mDatabase.isReadOnly()) {
                    if (enabled) {
                        mDatabase.enableWriteAheadLogging();
                    } else {
                        mDatabase.disableWriteAheadLogging();
                    }
                }
                mEnableWriteAheadLogging = enabled;
            }
        }
    }

    /**
     * Create and/or open a database that will be used for reading and writing.
     * The first time this is called, the database will be opened and
     * {@link #onCreate}, {@link #onUpgrade} and/or {@link #onOpen} will be
     * called.
     *
     * <p>Once opened successfully, the database is cached, so you can
     * call this method every time you need to write to the database.
     * (Make sure to call {@link #close} when you no longer need the database.)
     * Errors such as bad permissions or a full disk may cause this method
     * to fail, but future attempts may succeed if the problem is fixed.</p>
     *
     * <p class="caution">Database upgrade may take a long time, you
     * should not call this method from the application main thread, including
     * from {@link android.content.ContentProvider#onCreate ContentProvider.onCreate()}.
     *
     * @throws SQLiteException if the database cannot be opened for writing
     * @return a read/write database object valid until {@link #close} is called
     */
    public SQLiteDatabase getWritableDatabase() {
        synchronized (this) {
            return getDatabaseLocked(true);
        }
    }

    /**
     * Create and/or open a database.  This will be the same object returned by
     * {@link #getWritableDatabase} unless some problem, such as a full disk,
     * requires the database to be opened read-only.  In that case, a read-only
     * database object will be returned.  If the problem is fixed, a future call
     * to {@link #getWritableDatabase} may succeed, in which case the read-only
     * database object will be closed and the read/write object will be returned
     * in the future.
     *
     * <p class="caution">Like {@link #getWritableDatabase}, this method may
     * take a long time to return, so you should not call it from the
     * application main thread, including from
     * {@link android.content.ContentProvider#onCreate ContentProvider.onCreate()}.
     *
     * @throws SQLiteException if the database cannot be opened
     * @return a database object valid until {@link #getWritableDatabase}
     *     or {@link #close} is called.
     */
    public SQLiteDatabase getReadableDatabase() {
        synchronized (this) {
            return getDatabaseLocked(false);
        }
    }

    private SQLiteDatabase getDatabaseLocked(boolean writable) {
        if (mDatabase != null) {
            if (!mDatabase.isOpen()) {
                // Darn!  The user closed the database by calling mDatabase.close().
                mDatabase = null;
            } else if (!writable || !mDatabase.isReadOnly()) {
                // The database is already open for business.
                return mDatabase;
            }
        }

        if (mIsInitializing) {
            throw new IllegalStateException("getDatabase called recursively");
        }

        SQLiteDatabase db = mDatabase;
        try {
            mIsInitializing = true;

            if (db != null) {
                if (writable && db.isReadOnly()) {
                    db.reopenReadWrite();
                }
            } else if (mName == null) {
                db = SQLiteDatabase.create(null);
            } else {
                try {
                    if (DEBUG_STRICT_READONLY && !writable) {
                        final String path = mContext.getDatabasePath(mName).getPath();
                        db = SQLiteDatabase.openDatabase(path, mFactory,
                                SQLiteDatabase.OPEN_READONLY, mErrorHandler);
                    } else {
                        db = SQLiteDatabase.openOrCreateDatabase(
                                mName, mFactory, mErrorHandler
                        );
                    }
                } catch (SQLiteException ex) {
                    if (writable) {
                        throw ex;
                    }
                    Log.e(TAG, "Couldn't open " + mName
                            + " for writing (will try read-only):", ex);
                    final String path = mContext.getDatabasePath(mName).getPath();
                    db = SQLiteDatabase.openDatabase(path, mFactory,
                            SQLiteDatabase.OPEN_READONLY, mErrorHandler);
                }
            }

            onConfigure(db);

            final int version = db.getVersion();
            if (version != mNewVersion) {
                if (db.isReadOnly()) {
                    throw new SQLiteException("Can't upgrade read-only database from version " +
                            db.getVersion() + " to " + mNewVersion + ": " + mName);
                }

                db.beginTransaction();
                try {
                    if (version == 0) {
                        onCreate(db);
                    } else {
                        if (version > mNewVersion) {
                            onDowngrade(db, version, mNewVersion);
                        } else {
                            onUpgrade(db, version, mNewVersion);
                        }
                    }
                    db.setVersion(mNewVersion);
                    db.setTransactionSuccessful();
                } finally {
                    db.endTransaction();
                }
            }

            onOpen(db);

            if (db.isReadOnly()) {
                Log.w(TAG, "Opened " + mName + " in read-only mode");
            }

            mDatabase = db;
            return db;
        } finally {
            mIsInitializing = false;
            if (db != null && db != mDatabase) {
                db.close();
            }
        }
    }

    /**
     * Close any open database object.
     */
    public synchronized void close() {
        if (mIsInitializing) throw new IllegalStateException("Closed during initialization");

        if (mDatabase != null && mDatabase.isOpen()) {
            mDatabase.close();
            mDatabase = null;
        }
    }

    /**
     * Called when the database connection is being configured, to enable features
     * such as write-ahead logging or foreign key support.
     * <p>
     * This method is called before {@link #onCreate}, {@link #onUpgrade},
     * {@link #onDowngrade}, or {@link #onOpen} are called.  It should not modify
     * the database except to configure the database connection as required.
     * </p><p>
     * This method should only call methods that configure the parameters of the
     * database connection, such as {@link SQLiteDatabase#enableWriteAheadLogging}
     * {@link SQLiteDatabase#setForeignKeyConstraintsEnabled},
     * {@link SQLiteDatabase#setLocale}, {@link SQLiteDatabase#setMaximumSize},
     * or executing PRAGMA statements.
     * </p>
     *
     * @param db The database.
     */
    public void onConfigure(SQLiteDatabase db) {}

    /**
     * Called when the database is created for the first time. This is where the
     * creation of tables and the initial population of the tables should happen.
     *
     * @param db The database.
     */
    public abstract void onCreate(SQLiteDatabase db);

    /**
     * Called when the database needs to be upgraded. The implementation
     * should use this method to drop tables, add tables, or do anything else it
     * needs to upgrade to the new schema version.
     *
     * <p>
     * The SQLite ALTER TABLE documentation can be found
     * <a href="http://sqlite.org/lang_altertable.html">here</a>. If you add new columns
     * you can use ALTER TABLE to insert them into a live table. If you rename or remove columns
     * you can use ALTER TABLE to rename the old table, then create the new table and then
     * populate the new table with the contents of the old table.
     * </p><p>
     * This method executes within a transaction.  If an exception is thrown, all changes
     * will automatically be rolled back.
     * </p>
     *
     * @param db The database.
     * @param oldVersion The old database version.
     * @param newVersion The new database version.
     */
    public abstract void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion);

    /**
     * Called when the database needs to be downgraded. This is strictly similar to
     * {@link #onUpgrade} method, but is called whenever current version is newer than requested one.
     * However, this method is not abstract, so it is not mandatory for a customer to
     * implement it. If not overridden, default implementation will reject downgrade and
     * throws SQLiteException
     *
     * <p>
     * This method executes within a transaction.  If an exception is thrown, all changes
     * will automatically be rolled back.
     * </p>
     *
     * @param db The database.
     * @param oldVersion The old database version.
     * @param newVersion The new database version.
     */
    public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        throw new SQLiteException("Can't downgrade database from version " +
                oldVersion + " to " + newVersion);
    }

    /**
     * Called when the database has been opened.  The implementation
     * should check {@link SQLiteDatabase#isReadOnly} before updating the
     * database.
     * <p>
     * This method is called after the database connection has been configured
     * and after the database schema has been created, upgraded or downgraded as necessary.
     * If the database connection must be configured in some way before the schema
     * is created, upgraded, or downgraded, do it in {@link #onConfigure} instead.
     * </p>
     *
     * @param db The database.
     */
    public void onOpen(SQLiteDatabase db) {}
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteOutOfMemoryException.java.



































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

public class SQLiteOutOfMemoryException extends SQLiteException {
    public SQLiteOutOfMemoryException() {}

    public SQLiteOutOfMemoryException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteProgram.java.




































































































































































































































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.database.DatabaseUtils;
import android.os.CancellationSignal;

import java.util.Arrays;

/**
 * A base class for compiled SQLite programs.
 * <p>
 * This class is not thread-safe.
 * </p>
 */
public abstract class SQLiteProgram extends SQLiteClosable {
    private static final String[] EMPTY_STRING_ARRAY = new String[0];

    private final SQLiteDatabase mDatabase;
    private final String mSql;
    private final boolean mReadOnly;
    private final String[] mColumnNames;
    private final int mNumParameters;
    private final Object[] mBindArgs;

    SQLiteProgram(SQLiteDatabase db, String sql, Object[] bindArgs,
            CancellationSignal cancellationSignalForPrepare) {
        mDatabase = db;
        mSql = sql.trim();

        int n = DatabaseUtils.getSqlStatementType(mSql);
        switch (n) {
            case DatabaseUtils.STATEMENT_BEGIN:
            case DatabaseUtils.STATEMENT_COMMIT:
            case DatabaseUtils.STATEMENT_ABORT:
                mReadOnly = false;
                mColumnNames = EMPTY_STRING_ARRAY;
                mNumParameters = 0;
                break;

            default:
                boolean assumeReadOnly = (n == DatabaseUtils.STATEMENT_SELECT);
                SQLiteStatementInfo info = new SQLiteStatementInfo();
                db.getThreadSession().prepare(mSql,
                        db.getThreadDefaultConnectionFlags(assumeReadOnly),
                        cancellationSignalForPrepare, info);
                mReadOnly = info.readOnly;
                mColumnNames = info.columnNames;
                mNumParameters = info.numParameters;
                break;
        }

        if (bindArgs != null && bindArgs.length > mNumParameters) {
            throw new IllegalArgumentException("Too many bind arguments.  "
                    + bindArgs.length + " arguments were provided but the statement needs "
                    + mNumParameters + " arguments.");
        }

        if (mNumParameters != 0) {
            mBindArgs = new Object[mNumParameters];
            if (bindArgs != null) {
                System.arraycopy(bindArgs, 0, mBindArgs, 0, bindArgs.length);
            }
        } else {
            mBindArgs = null;
        }
    }

    final SQLiteDatabase getDatabase() {
        return mDatabase;
    }

    final String getSql() {
        return mSql;
    }

    final Object[] getBindArgs() {
        return mBindArgs;
    }

    final String[] getColumnNames() {
        return mColumnNames;
    }

    /** @hide */
    protected final SQLiteSession getSession() {
        return mDatabase.getThreadSession();
    }

    /** @hide */
    protected final int getConnectionFlags() {
        return mDatabase.getThreadDefaultConnectionFlags(mReadOnly);
    }

    /** @hide */
    protected final void onCorruption() {
        mDatabase.onCorruption();
    }

    /**
     * Unimplemented.
     * @deprecated This method is deprecated and must not be used.
     */
    @Deprecated
    public final int getUniqueId() {
        return -1;
    }

    /**
     * Bind a NULL value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *
     * @param index The 1-based index to the parameter to bind null to
     */
    public void bindNull(int index) {
        bind(index, null);
    }

    /**
     * Bind a long value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *addToBindArgs
     * @param index The 1-based index to the parameter to bind
     * @param value The value to bind
     */
    public void bindLong(int index, long value) {
        bind(index, value);
    }

    /**
     * Bind a double value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *
     * @param index The 1-based index to the parameter to bind
     * @param value The value to bind
     */
    public void bindDouble(int index, double value) {
        bind(index, value);
    }

    /**
     * Bind a String value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *
     * @param index The 1-based index to the parameter to bind
     * @param value The value to bind, must not be null
     */
    public void bindString(int index, String value) {
        if (value == null) {
            throw new IllegalArgumentException("the bind value at index " + index + " is null");
        }
        bind(index, value);
    }

    /**
     * Bind a byte array value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *
     * @param index The 1-based index to the parameter to bind
     * @param value The value to bind, must not be null
     */
    public void bindBlob(int index, byte[] value) {
        if (value == null) {
            throw new IllegalArgumentException("the bind value at index " + index + " is null");
        }
        bind(index, value);
    }

    /**
     * Clears all existing bindings. Unset bindings are treated as NULL.
     */
    public void clearBindings() {
        if (mBindArgs != null) {
            Arrays.fill(mBindArgs, null);
        }
    }

    /**
     * Given an array of String bindArgs, this method binds all of them in one single call.
     *
     * @param bindArgs the String array of bind args, none of which must be null.
     */
    public void bindAllArgsAsStrings(String[] bindArgs) {
        if (bindArgs != null) {
            for (int i = bindArgs.length; i != 0; i--) {
                bindString(i, bindArgs[i - 1]);
            }
        }
    }

    @Override
    protected void onAllReferencesReleased() {
        clearBindings();
    }

    private void bind(int index, Object value) {
        if (index < 1 || index > mNumParameters) {
            throw new IllegalArgumentException("Cannot bind argument at index "
                    + index + " because the index is out of range.  "
                    + "The statement has " + mNumParameters + " parameters.");
        }
        mBindArgs[index - 1] = value;
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteQuery.java.






























































































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.database.CursorWindow;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.util.Log;

/**
 * Represents a query that reads the resulting rows into a {@link SQLiteQuery}.
 * This class is used by {@link SQLiteCursor} and isn't useful itself.
 * <p>
 * This class is not thread-safe.
 * </p>
 */
public final class SQLiteQuery extends SQLiteProgram {
    private static final String TAG = "SQLiteQuery";

    private final CancellationSignal mCancellationSignal;

    SQLiteQuery(SQLiteDatabase db, String query, CancellationSignal cancellationSignal) {
        super(db, query, null, cancellationSignal);

        mCancellationSignal = cancellationSignal;
    }

    /**
     * Reads rows into a buffer.
     *
     * @param window The window to fill into
     * @param startPos The start position for filling the window.
     * @param requiredPos The position of a row that MUST be in the window.
     * If it won't fit, then the query should discard part of what it filled.
     * @param countAllRows True to count all rows that the query would
     * return regardless of whether they fit in the window.
     * @return Number of rows that were enumerated.  Might not be all rows
     * unless countAllRows is true.
     *
     * @throws SQLiteException if an error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     */
    int fillWindow(CursorWindow window, int startPos, int requiredPos, boolean countAllRows) {
        acquireReference();
        try {
            window.acquireReference();
            try {
                int numRows = getSession().executeForCursorWindow(getSql(), getBindArgs(),
                        window, startPos, requiredPos, countAllRows, getConnectionFlags(),
                        mCancellationSignal);
                return numRows;
            } catch (SQLiteDatabaseCorruptException ex) {
                onCorruption();
                throw ex;
            } catch (SQLiteException ex) {
                Log.e(TAG, "exception: " + ex.getMessage() + "; query: " + getSql());
                throw ex;
            } finally {
                window.releaseReference();
            }
        } finally {
            releaseReference();
        }
    }

    @Override
    public String toString() {
        return "SQLiteQuery: " + getSql();
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteQueryBuilder.java.





























































































































































































































































































































































































































































































































































































































































































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.database.Cursor;
import android.database.DatabaseUtils;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.provider.BaseColumns;
import android.text.TextUtils;
import android.util.Log;

import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.regex.Pattern;

/**
 * This is a convience class that helps build SQL queries to be sent to
 * {@link SQLiteDatabase} objects.
 */
public class SQLiteQueryBuilder
{
    private static final String TAG = "SQLiteQueryBuilder";
    private static final Pattern sLimitPattern =
            Pattern.compile("\\s*\\d+\\s*(,\\s*\\d+\\s*)?");

    private Map<String, String> mProjectionMap = null;
    private String mTables = "";
    private StringBuilder mWhereClause = null;  // lazily created
    private boolean mDistinct;
    private SQLiteDatabase.CursorFactory mFactory;
    private boolean mStrict;

    public SQLiteQueryBuilder() {
        mDistinct = false;
        mFactory = null;
    }

    /**
     * Mark the query as DISTINCT.
     *
     * @param distinct if true the query is DISTINCT, otherwise it isn't
     */
    public void setDistinct(boolean distinct) {
        mDistinct = distinct;
    }

    /**
     * Returns the list of tables being queried
     *
     * @return the list of tables being queried
     */
    public String getTables() {
        return mTables;
    }

    /**
     * Sets the list of tables to query. Multiple tables can be specified to perform a join.
     * For example:
     *   setTables("foo, bar")
     *   setTables("foo LEFT OUTER JOIN bar ON (foo.id = bar.foo_id)")
     *
     * @param inTables the list of tables to query on
     */
    public void setTables(String inTables) {
        mTables = inTables;
    }

    /**
     * Append a chunk to the WHERE clause of the query. All chunks appended are surrounded
     * by parenthesis and ANDed with the selection passed to {@link #query}. The final
     * WHERE clause looks like:
     *
     * WHERE (&lt;append chunk 1>&lt;append chunk2>) AND (&lt;query() selection parameter>)
     *
     * @param inWhere the chunk of text to append to the WHERE clause.
     */
    public void appendWhere(CharSequence inWhere) {
        if (mWhereClause == null) {
            mWhereClause = new StringBuilder(inWhere.length() + 16);
        }
        if (mWhereClause.length() == 0) {
            mWhereClause.append('(');
        }
        mWhereClause.append(inWhere);
    }

    /**
     * Append a chunk to the WHERE clause of the query. All chunks appended are surrounded
     * by parenthesis and ANDed with the selection passed to {@link #query}. The final
     * WHERE clause looks like:
     *
     * WHERE (&lt;append chunk 1>&lt;append chunk2>) AND (&lt;query() selection parameter>)
     *
     * @param inWhere the chunk of text to append to the WHERE clause. it will be escaped
     * to avoid SQL injection attacks
     */
    public void appendWhereEscapeString(String inWhere) {
        if (mWhereClause == null) {
            mWhereClause = new StringBuilder(inWhere.length() + 16);
        }
        if (mWhereClause.length() == 0) {
            mWhereClause.append('(');
        }
        DatabaseUtils.appendEscapedSQLString(mWhereClause, inWhere);
    }

    /**
     * Sets the projection map for the query.  The projection map maps
     * from column names that the caller passes into query to database
     * column names. This is useful for renaming columns as well as
     * disambiguating column names when doing joins. For example you
     * could map "name" to "people.name".  If a projection map is set
     * it must contain all column names the user may request, even if
     * the key and value are the same.
     *
     * @param columnMap maps from the user column names to the database column names
     */
    public void setProjectionMap(Map<String, String> columnMap) {
        mProjectionMap = columnMap;
    }

    /**
     * Sets the cursor factory to be used for the query.  You can use
     * one factory for all queries on a database but it is normally
     * easier to specify the factory when doing this query.
     *
     * @param factory the factory to use.
     */
    public void setCursorFactory(SQLiteDatabase.CursorFactory factory) {
        mFactory = factory;
    }

    /**
     * When set, the selection is verified against malicious arguments.
     * When using this class to create a statement using
     * {@link #buildQueryString(boolean, String, String[], String, String, String, String, String)},
     * non-numeric limits will raise an exception. If a projection map is specified, fields
     * not in that map will be ignored.
     * If this class is used to execute the statement directly using
     * {@link #query(SQLiteDatabase, String[], String, String[], String, String, String)}
     * or
     * {@link #query(SQLiteDatabase, String[], String, String[], String, String, String, String)},
     * additionally also parenthesis escaping selection are caught.
     *
     * To summarize: To get maximum protection against malicious third party apps (for example
     * content provider consumers), make sure to do the following:
     * <ul>
     * <li>Set this value to true</li>
     * <li>Use a projection map</li>
     * <li>Use one of the query overloads instead of getting the statement as a sql string</li>
     * </ul>
     * By default, this value is false.
     */
    public void setStrict(boolean flag) {
        mStrict = flag;
    }

    /**
     * Build an SQL query string from the given clauses.
     *
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param tables The table names to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param where A filter declaring which rows to return, formatted as an SQL
     *            WHERE clause (excluding the WHERE itself). Passing null will
     *            return all rows for the given URL.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return the SQL query string
     */
    public static String buildQueryString(
            boolean distinct, String tables, String[] columns, String where,
            String groupBy, String having, String orderBy, String limit) {
        if (TextUtils.isEmpty(groupBy) && !TextUtils.isEmpty(having)) {
            throw new IllegalArgumentException(
                    "HAVING clauses are only permitted when using a groupBy clause");
        }
        if (!TextUtils.isEmpty(limit) && !sLimitPattern.matcher(limit).matches()) {
            throw new IllegalArgumentException("invalid LIMIT clauses:" + limit);
        }

        StringBuilder query = new StringBuilder(120);

        query.append("SELECT ");
        if (distinct) {
            query.append("DISTINCT ");
        }
        if (columns != null && columns.length != 0) {
            appendColumns(query, columns);
        } else {
            query.append("* ");
        }
        query.append("FROM ");
        query.append(tables);
        appendClause(query, " WHERE ", where);
        appendClause(query, " GROUP BY ", groupBy);
        appendClause(query, " HAVING ", having);
        appendClause(query, " ORDER BY ", orderBy);
        appendClause(query, " LIMIT ", limit);

        return query.toString();
    }

    private static void appendClause(StringBuilder s, String name, String clause) {
        if (!TextUtils.isEmpty(clause)) {
            s.append(name);
            s.append(clause);
        }
    }

    /**
     * Add the names that are non-null in columns to s, separating
     * them with commas.
     */
    public static void appendColumns(StringBuilder s, String[] columns) {
        int n = columns.length;

        for (int i = 0; i < n; i++) {
            String column = columns[i];

            if (column != null) {
                if (i > 0) {
                    s.append(", ");
                }
                s.append(column);
            }
        }
        s.append(' ');
    }

    /**
     * Perform a query by combining all current settings and the
     * information passed into this method.
     *
     * @param db the database to query on
     * @param projectionIn A list of which columns to return. Passing
     *   null will return all columns, which is discouraged to prevent
     *   reading data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself). Passing null will return all rows for the given URL.
     * @param selectionArgs You may include ?s in selection, which
     *   will be replaced by the values from selectionArgs, in order
     *   that they appear in the selection. The values will be bound
     *   as Strings.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY
     *   itself). Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself). Passing null
     *   will use the default sort order, which may be unordered.
     * @return a cursor over the result set
     * @see android.content.ContentResolver#query(android.net.Uri, String[],
     *      String, String[], String)
     */
    public Cursor query(SQLiteDatabase db, String[] projectionIn,
            String selection, String[] selectionArgs, String groupBy,
            String having, String sortOrder) {
        return query(db, projectionIn, selection, selectionArgs, groupBy, having, sortOrder,
                null /* limit */, null /* cancellationSignal */);
    }

    /**
     * Perform a query by combining all current settings and the
     * information passed into this method.
     *
     * @param db the database to query on
     * @param projectionIn A list of which columns to return. Passing
     *   null will return all columns, which is discouraged to prevent
     *   reading data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself). Passing null will return all rows for the given URL.
     * @param selectionArgs You may include ?s in selection, which
     *   will be replaced by the values from selectionArgs, in order
     *   that they appear in the selection. The values will be bound
     *   as Strings.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY
     *   itself). Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself). Passing null
     *   will use the default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *   formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return a cursor over the result set
     * @see android.content.ContentResolver#query(android.net.Uri, String[],
     *      String, String[], String)
     */
    public Cursor query(SQLiteDatabase db, String[] projectionIn,
            String selection, String[] selectionArgs, String groupBy,
            String having, String sortOrder, String limit) {
        return query(db, projectionIn, selection, selectionArgs,
                groupBy, having, sortOrder, limit, null);
    }

    /**
     * Perform a query by combining all current settings and the
     * information passed into this method.
     *
     * @param db the database to query on
     * @param projectionIn A list of which columns to return. Passing
     *   null will return all columns, which is discouraged to prevent
     *   reading data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself). Passing null will return all rows for the given URL.
     * @param selectionArgs You may include ?s in selection, which
     *   will be replaced by the values from selectionArgs, in order
     *   that they appear in the selection. The values will be bound
     *   as Strings.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY
     *   itself). Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself). Passing null
     *   will use the default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *   formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return a cursor over the result set
     * @see android.content.ContentResolver#query(android.net.Uri, String[],
     *      String, String[], String)
     */
    public Cursor query(SQLiteDatabase db, String[] projectionIn,
            String selection, String[] selectionArgs, String groupBy,
            String having, String sortOrder, String limit, CancellationSignal cancellationSignal) {
        if (mTables == null) {
            return null;
        }

        if (mStrict && selection != null && selection.length() > 0) {
            // Validate the user-supplied selection to detect syntactic anomalies
            // in the selection string that could indicate a SQL injection attempt.
            // The idea is to ensure that the selection clause is a valid SQL expression
            // by compiling it twice: once wrapped in parentheses and once as
            // originally specified. An attacker cannot create an expression that
            // would escape the SQL expression while maintaining balanced parentheses
            // in both the wrapped and original forms.
            String sqlForValidation = buildQuery(projectionIn, "(" + selection + ")", groupBy,
                    having, sortOrder, limit);
            validateQuerySql(db, sqlForValidation,
                    cancellationSignal); // will throw if query is invalid
        }

        String sql = buildQuery(
                projectionIn, selection, groupBy, having,
                sortOrder, limit);

        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "Performing query: " + sql);
        }
        return db.rawQueryWithFactory(
                mFactory, sql, selectionArgs,
                SQLiteDatabase.findEditTable(mTables),
                cancellationSignal); // will throw if query is invalid
    }

    /**
     * Verifies that a SQL SELECT statement is valid by compiling it.
     * If the SQL statement is not valid, this method will throw a {@link SQLiteException}.
     */
    private void validateQuerySql(SQLiteDatabase db, String sql,
            CancellationSignal cancellationSignal) {
        db.getThreadSession().prepare(sql,
                db.getThreadDefaultConnectionFlags(true /*readOnly*/), cancellationSignal, null);
    }

    /**
     * Construct a SELECT statement suitable for use in a group of
     * SELECT statements that will be joined through UNION operators
     * in buildUnionQuery.
     *
     * @param projectionIn A list of which columns to return. Passing
     *    null will return all columns, which is discouraged to
     *    prevent reading data from storage that isn't going to be
     *    used.
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself).  Passing null will return all rows for the given
     *   URL.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY itself).
     *   Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself). Passing null
     *   will use the default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *   formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return the resulting SQL SELECT statement
     */
    public String buildQuery(
            String[] projectionIn, String selection, String groupBy,
            String having, String sortOrder, String limit) {
        String[] projection = computeProjection(projectionIn);

        StringBuilder where = new StringBuilder();
        boolean hasBaseWhereClause = mWhereClause != null && mWhereClause.length() > 0;

        if (hasBaseWhereClause) {
            where.append(mWhereClause.toString());
            where.append(')');
        }

        // Tack on the user's selection, if present.
        if (selection != null && selection.length() > 0) {
            if (hasBaseWhereClause) {
                where.append(" AND ");
            }

            where.append('(');
            where.append(selection);
            where.append(')');
        }

        return buildQueryString(
                mDistinct, mTables, projection, where.toString(),
                groupBy, having, sortOrder, limit);
    }

    /**
     * @deprecated This method's signature is misleading since no SQL parameter
     * substitution is carried out.  The selection arguments parameter does not get
     * used at all.  To avoid confusion, call
     * {@link #buildQuery(String[], String, String, String, String, String)} instead.
     */
    @Deprecated
    public String buildQuery(
            String[] projectionIn, String selection, String[] selectionArgs,
            String groupBy, String having, String sortOrder, String limit) {
        return buildQuery(projectionIn, selection, groupBy, having, sortOrder, limit);
    }

    /**
     * Construct a SELECT statement suitable for use in a group of
     * SELECT statements that will be joined through UNION operators
     * in buildUnionQuery.
     *
     * @param typeDiscriminatorColumn the name of the result column
     *   whose cells will contain the name of the table from which
     *   each row was drawn.
     * @param unionColumns the names of the columns to appear in the
     *   result.  This may include columns that do not appear in the
     *   table this SELECT is querying (i.e. mTables), but that do
     *   appear in one of the other tables in the UNION query that we
     *   are constructing.
     * @param columnsPresentInTable a Set of the names of the columns
     *   that appear in this table (i.e. in the table whose name is
     *   mTables).  Since columns in unionColumns include columns that
     *   appear only in other tables, we use this array to distinguish
     *   which ones actually are present.  Other columns will have
     *   NULL values for results from this subquery.
     * @param computedColumnsOffset all columns in unionColumns before
     *   this index are included under the assumption that they're
     *   computed and therefore won't appear in columnsPresentInTable,
     *   e.g. "date * 1000 as normalized_date"
     * @param typeDiscriminatorValue the value used for the
     *   type-discriminator column in this subquery
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself).  Passing null will return all rows for the given
     *   URL.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY itself).
     *   Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @return the resulting SQL SELECT statement
     */
    public String buildUnionSubQuery(
            String typeDiscriminatorColumn,
            String[] unionColumns,
            Set<String> columnsPresentInTable,
            int computedColumnsOffset,
            String typeDiscriminatorValue,
            String selection,
            String groupBy,
            String having) {
        int unionColumnsCount = unionColumns.length;
        String[] projectionIn = new String[unionColumnsCount];

        for (int i = 0; i < unionColumnsCount; i++) {
            String unionColumn = unionColumns[i];

            if (unionColumn.equals(typeDiscriminatorColumn)) {
                projectionIn[i] = "'" + typeDiscriminatorValue + "' AS "
                        + typeDiscriminatorColumn;
            } else if (i <= computedColumnsOffset
                       || columnsPresentInTable.contains(unionColumn)) {
                projectionIn[i] = unionColumn;
            } else {
                projectionIn[i] = "NULL AS " + unionColumn;
            }
        }
        return buildQuery(
                projectionIn, selection, groupBy, having,
                null /* sortOrder */,
                null /* limit */);
    }

    /**
     * @deprecated This method's signature is misleading since no SQL parameter
     * substitution is carried out.  The selection arguments parameter does not get
     * used at all.  To avoid confusion, call
     * {@link #buildUnionSubQuery}
     * instead.
     */
    @Deprecated
    public String buildUnionSubQuery(
            String typeDiscriminatorColumn,
            String[] unionColumns,
            Set<String> columnsPresentInTable,
            int computedColumnsOffset,
            String typeDiscriminatorValue,
            String selection,
            String[] selectionArgs,
            String groupBy,
            String having) {
        return buildUnionSubQuery(
                typeDiscriminatorColumn, unionColumns, columnsPresentInTable,
                computedColumnsOffset, typeDiscriminatorValue, selection,
                groupBy, having);
    }

    /**
     * Given a set of subqueries, all of which are SELECT statements,
     * construct a query that returns the union of what those
     * subqueries return.
     * @param subQueries an array of SQL SELECT statements, all of
     *   which must have the same columns as the same positions in
     *   their results
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself).  Passing
     *   null will use the default sort order, which may be unordered.
     * @param limit The limit clause, which applies to the entire union result set
     *
     * @return the resulting SQL SELECT statement
     */
    public String buildUnionQuery(String[] subQueries, String sortOrder, String limit) {
        StringBuilder query = new StringBuilder(128);
        int subQueryCount = subQueries.length;
        String unionOperator = mDistinct ? " UNION " : " UNION ALL ";

        for (int i = 0; i < subQueryCount; i++) {
            if (i > 0) {
                query.append(unionOperator);
            }
            query.append(subQueries[i]);
        }
        appendClause(query, " ORDER BY ", sortOrder);
        appendClause(query, " LIMIT ", limit);
        return query.toString();
    }

    private String[] computeProjection(String[] projectionIn) {
        if (projectionIn != null && projectionIn.length > 0) {
            if (mProjectionMap != null) {
                String[] projection = new String[projectionIn.length];
                int length = projectionIn.length;

                for (int i = 0; i < length; i++) {
                    String userColumn = projectionIn[i];
                    String column = mProjectionMap.get(userColumn);

                    if (column != null) {
                        projection[i] = column;
                        continue;
                    }

                    if (!mStrict &&
                            ( userColumn.contains(" AS ") || userColumn.contains(" as "))) {
                        /* A column alias already exist */
                        projection[i] = userColumn;
                        continue;
                    }

                    throw new IllegalArgumentException("Invalid column "
                            + projectionIn[i]);
                }
                return projection;
            } else {
                return projectionIn;
            }
        } else if (mProjectionMap != null) {
            // Return all columns in projection map.
            Set<Entry<String, String>> entrySet = mProjectionMap.entrySet();
            String[] projection = new String[entrySet.size()];
            Iterator<Entry<String, String>> entryIter = entrySet.iterator();
            int i = 0;

            while (entryIter.hasNext()) {
                Entry<String, String> entry = entryIter.next();

                // Don't include the _count column when people ask for no projection.
                if (entry.getKey().equals(BaseColumns._COUNT)) {
                    continue;
                }
                projection[i++] = entry.getValue();
            }
            return projection;
        }
        return null;
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteReadOnlyDatabaseException.java.



































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

public class SQLiteReadOnlyDatabaseException extends SQLiteException {
    public SQLiteReadOnlyDatabaseException() {}

    public SQLiteReadOnlyDatabaseException(String error) {
        super(error);
    }
}






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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.database.CursorWindow;
import android.database.DatabaseUtils;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.os.ParcelFileDescriptor;

/**
 * Provides a single client the ability to use a database.
 *
 * <h2>About database sessions</h2>
 * <p>
 * Database access is always performed using a session.  The session
 * manages the lifecycle of transactions and database connections.
 * </p><p>
 * Sessions can be used to perform both read-only and read-write operations.
 * There is some advantage to knowing when a session is being used for
 * read-only purposes because the connection pool can optimize the use
 * of the available connections to permit multiple read-only operations
 * to execute in parallel whereas read-write operations may need to be serialized.
 * </p><p>
 * When <em>Write Ahead Logging (WAL)</em> is enabled, the database can
 * execute simultaneous read-only and read-write transactions, provided that
 * at most one read-write transaction is performed at a time.  When WAL is not
 * enabled, read-only transactions can execute in parallel but read-write
 * transactions are mutually exclusive.
 * </p>
 *
 * <h2>Ownership and concurrency guarantees</h2>
 * <p>
 * Session objects are not thread-safe.  In fact, session objects are thread-bound.
 * The {@link SQLiteDatabase} uses a thread-local variable to associate a session
 * with each thread for the use of that thread alone.  Consequently, each thread
 * has its own session object and therefore its own transaction state independent
 * of other threads.
 * </p><p>
 * A thread has at most one session per database.  This constraint ensures that
 * a thread can never use more than one database connection at a time for a
 * given database.  As the number of available database connections is limited,
 * if a single thread tried to acquire multiple connections for the same database
 * at the same time, it might deadlock.  Therefore we allow there to be only
 * one session (so, at most one connection) per thread per database.
 * </p>
 *
 * <h2>Transactions</h2>
 * <p>
 * There are two kinds of transaction: implicit transactions and explicit
 * transactions.
 * </p><p>
 * An implicit transaction is created whenever a database operation is requested
 * and there is no explicit transaction currently in progress.  An implicit transaction
 * only lasts for the duration of the database operation in question and then it
 * is ended.  If the database operation was successful, then its changes are committed.
 * </p><p>
 * An explicit transaction is started by calling {@link #beginTransaction} and
 * specifying the desired transaction mode.  Once an explicit transaction has begun,
 * all subsequent database operations will be performed as part of that transaction.
 * To end an explicit transaction, first call {@link #setTransactionSuccessful} if the
 * transaction was successful, then call {@link #end}.  If the transaction was
 * marked successful, its changes will be committed, otherwise they will be rolled back.
 * </p><p>
 * Explicit transactions can also be nested.  A nested explicit transaction is
 * started with {@link #beginTransaction}, marked successful with
 * {@link #setTransactionSuccessful}and ended with {@link #endTransaction}.
 * If any nested transaction is not marked successful, then the entire transaction
 * including all of its nested transactions will be rolled back
 * when the outermost transaction is ended.
 * </p><p>
 * To improve concurrency, an explicit transaction can be yielded by calling
 * {@link #yieldTransaction}.  If there is contention for use of the database,
 * then yielding ends the current transaction, commits its changes, releases the
 * database connection for use by another session for a little while, and starts a
 * new transaction with the same properties as the original one.
 * Changes committed by {@link #yieldTransaction} cannot be rolled back.
 * </p><p>
 * When a transaction is started, the client can provide a {@link SQLiteTransactionListener}
 * to listen for notifications of transaction-related events.
 * </p><p>
 * Recommended usage:
 * <code><pre>
 * // First, begin the transaction.
 * session.beginTransaction(SQLiteSession.TRANSACTION_MODE_DEFERRED, 0);
 * try {
 *     // Then do stuff...
 *     session.execute("INSERT INTO ...", null, 0);
 *
 *     // As the very last step before ending the transaction, mark it successful.
 *     session.setTransactionSuccessful();
 * } finally {
 *     // Finally, end the transaction.
 *     // This statement will commit the transaction if it was marked successful or
 *     // roll it back otherwise.
 *     session.endTransaction();
 * }
 * </pre></code>
 * </p>
 *
 * <h2>Database connections</h2>
 * <p>
 * A {@link SQLiteDatabase} can have multiple active sessions at the same
 * time.  Each session acquires and releases connections to the database
 * as needed to perform each requested database transaction.  If all connections
 * are in use, then database transactions on some sessions will block until a
 * connection becomes available.
 * </p><p>
 * The session acquires a single database connection only for the duration
 * of a single (implicit or explicit) database transaction, then releases it.
 * This characteristic allows a small pool of database connections to be shared
 * efficiently by multiple sessions as long as they are not all trying to perform
 * database transactions at the same time.
 * </p>
 *
 * <h2>Responsiveness</h2>
 * <p>
 * Because there are a limited number of database connections and the session holds
 * a database connection for the entire duration of a database transaction,
 * it is important to keep transactions short.  This is especially important
 * for read-write transactions since they may block other transactions
 * from executing.  Consider calling {@link #yieldTransaction} periodically
 * during long-running transactions.
 * </p><p>
 * Another important consideration is that transactions that take too long to
 * run may cause the application UI to become unresponsive.  Even if the transaction
 * is executed in a background thread, the user will get bored and
 * frustrated if the application shows no data for several seconds while
 * a transaction runs.
 * </p><p>
 * Guidelines:
 * <ul>
 * <li>Do not perform database transactions on the UI thread.</li>
 * <li>Keep database transactions as short as possible.</li>
 * <li>Simple queries often run faster than complex queries.</li>
 * <li>Measure the performance of your database transactions.</li>
 * <li>Consider what will happen when the size of the data set grows.
 * A query that works well on 100 rows may struggle with 10,000.</li>
 * </ul>
 *
 * <h2>Reentrance</h2>
 * <p>
 * This class must tolerate reentrant execution of SQLite operations because
 * triggers may call custom SQLite functions that perform additional queries.
 * </p>
 *
 * @hide
 */
public final class SQLiteSession {
    private final SQLiteConnectionPool mConnectionPool;

    private SQLiteConnection mConnection;
    private int mConnectionFlags;
    private int mConnectionUseCount;
    private Transaction mTransactionPool;
    private Transaction mTransactionStack;

    /**
     * Transaction mode: Deferred.
     * <p>
     * In a deferred transaction, no locks are acquired on the database
     * until the first operation is performed.  If the first operation is
     * read-only, then a <code>SHARED</code> lock is acquired, otherwise
     * a <code>RESERVED</code> lock is acquired.
     * </p><p>
     * While holding a <code>SHARED</code> lock, this session is only allowed to
     * read but other sessions are allowed to read or write.
     * While holding a <code>RESERVED</code> lock, this session is allowed to read
     * or write but other sessions are only allowed to read.
     * </p><p>
     * Because the lock is only acquired when needed in a deferred transaction,
     * it is possible for another session to write to the database first before
     * this session has a chance to do anything.
     * </p><p>
     * Corresponds to the SQLite <code>BEGIN DEFERRED</code> transaction mode.
     * </p>
     */
    public static final int TRANSACTION_MODE_DEFERRED = 0;

    /**
     * Transaction mode: Immediate.
     * <p>
     * When an immediate transaction begins, the session acquires a
     * <code>RESERVED</code> lock.
     * </p><p>
     * While holding a <code>RESERVED</code> lock, this session is allowed to read
     * or write but other sessions are only allowed to read.
     * </p><p>
     * Corresponds to the SQLite <code>BEGIN IMMEDIATE</code> transaction mode.
     * </p>
     */
    public static final int TRANSACTION_MODE_IMMEDIATE = 1;

    /**
     * Transaction mode: Exclusive.
     * <p>
     * When an exclusive transaction begins, the session acquires an
     * <code>EXCLUSIVE</code> lock.
     * </p><p>
     * While holding an <code>EXCLUSIVE</code> lock, this session is allowed to read
     * or write but no other sessions are allowed to access the database.
     * </p><p>
     * Corresponds to the SQLite <code>BEGIN EXCLUSIVE</code> transaction mode.
     * </p>
     */
    public static final int TRANSACTION_MODE_EXCLUSIVE = 2;

    /**
     * Creates a session bound to the specified connection pool.
     *
     * @param connectionPool The connection pool.
     */
    public SQLiteSession(SQLiteConnectionPool connectionPool) {
        if (connectionPool == null) {
            throw new IllegalArgumentException("connectionPool must not be null");
        }

        mConnectionPool = connectionPool;
    }

    /**
     * Returns true if the session has a transaction in progress.
     *
     * @return True if the session has a transaction in progress.
     */
    public boolean hasTransaction() {
        return mTransactionStack != null;
    }

    /**
     * Returns true if the session has a nested transaction in progress.
     *
     * @return True if the session has a nested transaction in progress.
     */
    public boolean hasNestedTransaction() {
        return mTransactionStack != null && mTransactionStack.mParent != null;
    }

    /**
     * Returns true if the session has an active database connection.
     *
     * @return True if the session has an active database connection.
     */
    public boolean hasConnection() {
        return mConnection != null;
    }

    /**
     * Begins a transaction.
     * <p>
     * Transactions may nest.  If the transaction is not in progress,
     * then a database connection is obtained and a new transaction is started.
     * Otherwise, a nested transaction is started.
     * </p><p>
     * Each call to {@link #beginTransaction} must be matched exactly by a call
     * to {@link #endTransaction}.  To mark a transaction as successful,
     * call {@link #setTransactionSuccessful} before calling {@link #endTransaction}.
     * If the transaction is not successful, or if any of its nested
     * transactions were not successful, then the entire transaction will
     * be rolled back when the outermost transaction is ended.
     * </p>
     *
     * @param transactionMode The transaction mode.  One of: {@link #TRANSACTION_MODE_DEFERRED},
     * {@link #TRANSACTION_MODE_IMMEDIATE}, or {@link #TRANSACTION_MODE_EXCLUSIVE}.
     * Ignored when creating a nested transaction.
     * @param transactionListener The transaction listener, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     *
     * @throws IllegalStateException if {@link #setTransactionSuccessful} has already been
     * called for the current transaction.
     * @throws SQLiteException if an error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     *
     * @see #setTransactionSuccessful
     * @see #yieldTransaction
     * @see #endTransaction
     */
    public void beginTransaction(int transactionMode,
            SQLiteTransactionListener transactionListener, int connectionFlags,
            CancellationSignal cancellationSignal) {
        throwIfTransactionMarkedSuccessful();
        beginTransactionUnchecked(transactionMode, transactionListener, connectionFlags,
                cancellationSignal);
    }

    private void beginTransactionUnchecked(int transactionMode,
            SQLiteTransactionListener transactionListener, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        if (mTransactionStack == null) {
            acquireConnection(null, connectionFlags, cancellationSignal); // might throw
        }
        try {
            // Set up the transaction such that we can back out safely
            // in case we fail part way.
            if (mTransactionStack == null) {
                // Execute SQL might throw a runtime exception.
                switch (transactionMode) {
                    case TRANSACTION_MODE_IMMEDIATE:
                        mConnection.execute("BEGIN IMMEDIATE;", null,
                                cancellationSignal); // might throw
                        break;
                    case TRANSACTION_MODE_EXCLUSIVE:
                        mConnection.execute("BEGIN EXCLUSIVE;", null,
                                cancellationSignal); // might throw
                        break;
                    default:
                        mConnection.execute("BEGIN;", null, cancellationSignal); // might throw
                        break;
                }
            }

            // Listener might throw a runtime exception.
            if (transactionListener != null) {
                try {
                    transactionListener.onBegin(); // might throw
                } catch (RuntimeException ex) {
                    if (mTransactionStack == null) {
                        mConnection.execute("ROLLBACK;", null, cancellationSignal); // might throw
                    }
                    throw ex;
                }
            }

            // Bookkeeping can't throw, except an OOM, which is just too bad...
            Transaction transaction = obtainTransaction(transactionMode, transactionListener);
            transaction.mParent = mTransactionStack;
            mTransactionStack = transaction;
        } finally {
            if (mTransactionStack == null) {
                releaseConnection(); // might throw
            }
        }
    }

    /**
     * Marks the current transaction as having completed successfully.
     * <p>
     * This method can be called at most once between {@link #beginTransaction} and
     * {@link #endTransaction} to indicate that the changes made by the transaction should be
     * committed.  If this method is not called, the changes will be rolled back
     * when the transaction is ended.
     * </p>
     *
     * @throws IllegalStateException if there is no current transaction, or if
     * {@link #setTransactionSuccessful} has already been called for the current transaction.
     *
     * @see #beginTransaction
     * @see #endTransaction
     */
    public void setTransactionSuccessful() {
        throwIfNoTransaction();
        throwIfTransactionMarkedSuccessful();

        mTransactionStack.mMarkedSuccessful = true;
    }

    /**
     * Ends the current transaction and commits or rolls back changes.
     * <p>
     * If this is the outermost transaction (not nested within any other
     * transaction), then the changes are committed if {@link #setTransactionSuccessful}
     * was called or rolled back otherwise.
     * </p><p>
     * This method must be called exactly once for each call to {@link #beginTransaction}.
     * </p>
     *
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     *
     * @throws IllegalStateException if there is no current transaction.
     * @throws SQLiteException if an error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     *
     * @see #beginTransaction
     * @see #setTransactionSuccessful
     * @see #yieldTransaction
     */
    public void endTransaction(CancellationSignal cancellationSignal) {
        throwIfNoTransaction();
        assert mConnection != null;

        endTransactionUnchecked(cancellationSignal, false);
    }

    private void endTransactionUnchecked(CancellationSignal cancellationSignal, boolean yielding) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        final Transaction top = mTransactionStack;
        boolean successful = (top.mMarkedSuccessful || yielding) && !top.mChildFailed;

        RuntimeException listenerException = null;
        final SQLiteTransactionListener listener = top.mListener;
        if (listener != null) {
            try {
                if (successful) {
                    listener.onCommit(); // might throw
                } else {
                    listener.onRollback(); // might throw
                }
            } catch (RuntimeException ex) {
                listenerException = ex;
                successful = false;
            }
        }

        mTransactionStack = top.mParent;
        recycleTransaction(top);

        if (mTransactionStack != null) {
            if (!successful) {
                mTransactionStack.mChildFailed = true;
            }
        } else {
            try {
                if (successful) {
                    mConnection.execute("COMMIT;", null, cancellationSignal); // might throw
                } else {
                    mConnection.execute("ROLLBACK;", null, cancellationSignal); // might throw
                }
            } finally {
                releaseConnection(); // might throw
            }
        }

        if (listenerException != null) {
            throw listenerException;
        }
    }

    /**
     * Temporarily ends a transaction to let other threads have use of
     * the database.  Begins a new transaction after a specified delay.
     * <p>
     * If there are other threads waiting to acquire connections,
     * then the current transaction is committed and the database
     * connection is released.  After a short delay, a new transaction
     * is started.
     * </p><p>
     * The transaction is assumed to be successful so far.  Do not call
     * {@link #setTransactionSuccessful()} before calling this method.
     * This method will fail if the transaction has already been marked
     * successful.
     * </p><p>
     * The changes that were committed by a yield cannot be rolled back later.
     * </p><p>
     * Before this method was called, there must already have been
     * a transaction in progress.  When this method returns, there will
     * still be a transaction in progress, either the same one as before
     * or a new one if the transaction was actually yielded.
     * </p><p>
     * This method should not be called when there is a nested transaction
     * in progress because it is not possible to yield a nested transaction.
     * If <code>throwIfNested</code> is true, then attempting to yield
     * a nested transaction will throw {@link IllegalStateException}, otherwise
     * the method will return <code>false</code> in that case.
     * </p><p>
     * If there is no nested transaction in progress but a previous nested
     * transaction failed, then the transaction is not yielded (because it
     * must be rolled back) and this method returns <code>false</code>.
     * </p>
     *
     * @param sleepAfterYieldDelayMillis A delay time to wait after yielding
     * the database connection to allow other threads some time to run.
     * If the value is less than or equal to zero, there will be no additional
     * delay beyond the time it will take to begin a new transaction.
     * @param throwIfUnsafe If true, then instead of returning false when no
     * transaction is in progress, a nested transaction is in progress, or when
     * the transaction has already been marked successful, throws {@link IllegalStateException}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return True if the transaction was actually yielded.
     *
     * @throws IllegalStateException if <code>throwIfNested</code> is true and
     * there is no current transaction, there is a nested transaction in progress or
     * if {@link #setTransactionSuccessful} has already been called for the current transaction.
     * @throws SQLiteException if an error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     *
     * @see #beginTransaction
     * @see #endTransaction
     */
    public boolean yieldTransaction(long sleepAfterYieldDelayMillis, boolean throwIfUnsafe,
            CancellationSignal cancellationSignal) {
        if (throwIfUnsafe) {
            throwIfNoTransaction();
            throwIfTransactionMarkedSuccessful();
            throwIfNestedTransaction();
        } else {
            if (mTransactionStack == null || mTransactionStack.mMarkedSuccessful
                    || mTransactionStack.mParent != null) {
                return false;
            }
        }
        assert mConnection != null;

        if (mTransactionStack.mChildFailed) {
            return false;
        }

        return yieldTransactionUnchecked(sleepAfterYieldDelayMillis,
                cancellationSignal); // might throw
    }

    private boolean yieldTransactionUnchecked(long sleepAfterYieldDelayMillis,
            CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        if (!mConnectionPool.shouldYieldConnection(mConnection, mConnectionFlags)) {
            return false;
        }

        final int transactionMode = mTransactionStack.mMode;
        final SQLiteTransactionListener listener = mTransactionStack.mListener;
        final int connectionFlags = mConnectionFlags;
        endTransactionUnchecked(cancellationSignal, true); // might throw

        if (sleepAfterYieldDelayMillis > 0) {
            try {
                Thread.sleep(sleepAfterYieldDelayMillis);
            } catch (InterruptedException ex) {
                // we have been interrupted, that's all we need to do
            }
        }

        beginTransactionUnchecked(transactionMode, listener, connectionFlags,
                cancellationSignal); // might throw
        return true;
    }

    /**
     * Prepares a statement for execution but does not bind its parameters or execute it.
     * <p>
     * This method can be used to check for syntax errors during compilation
     * prior to execution of the statement.  If the {@code outStatementInfo} argument
     * is not null, the provided {@link SQLiteStatementInfo} object is populated
     * with information about the statement.
     * </p><p>
     * A prepared statement makes no reference to the arguments that may eventually
     * be bound to it, consequently it it possible to cache certain prepared statements
     * such as SELECT or INSERT/UPDATE statements.  If the statement is cacheable,
     * then it will be stored in the cache for later and reused if possible.
     * </p>
     *
     * @param sql The SQL statement to prepare.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @param outStatementInfo The {@link SQLiteStatementInfo} object to populate
     * with information about the statement, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public void prepare(String sql, int connectionFlags, CancellationSignal cancellationSignal,
            SQLiteStatementInfo outStatementInfo) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            mConnection.prepare(sql, outStatementInfo); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that does not return a result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public void execute(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            mConnection.execute(sql, bindArgs, cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns a single <code>long</code> result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The value of the first column in the first row of the result set
     * as a <code>long</code>, or zero if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public long executeForLong(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return 0;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForLong(sql, bindArgs, cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns a single {@link String} result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The value of the first column in the first row of the result set
     * as a <code>String</code>, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public String executeForString(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return null;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForString(sql, bindArgs, cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns a single BLOB result as a
     * file descriptor to a shared memory region.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The file descriptor for a shared memory region that contains
     * the value of the first column in the first row of the result set as a BLOB,
     * or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public ParcelFileDescriptor executeForBlobFileDescriptor(String sql, Object[] bindArgs,
            int connectionFlags, CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return null;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForBlobFileDescriptor(sql, bindArgs,
                    cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns a count of the number of rows
     * that were changed.  Use for UPDATE or DELETE SQL statements.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The number of rows that were changed.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public int executeForChangedRowCount(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return 0;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForChangedRowCount(sql, bindArgs,
                    cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns the row id of the last row inserted
     * by the statement.  Use for INSERT SQL statements.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The row id of the last row that was inserted, or 0 if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public long executeForLastInsertedRowId(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return 0;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForLastInsertedRowId(sql, bindArgs,
                    cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement and populates the specified {@link CursorWindow}
     * with a range of results.  Returns the number of rows that were counted
     * during query execution.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param window The cursor window to clear and fill.
     * @param startPos The start position for filling the window.
     * @param requiredPos The position of a row that MUST be in the window.
     * If it won't fit, then the query should discard part of what it filled
     * so that it does.  Must be greater than or equal to <code>startPos</code>.
     * @param countAllRows True to count all rows that the query would return
     * regagless of whether they fit in the window.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The number of rows that were counted during query execution.  Might
     * not be all rows in the result set unless <code>countAllRows</code> is true.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public int executeForCursorWindow(String sql, Object[] bindArgs,
            CursorWindow window, int startPos, int requiredPos, boolean countAllRows,
            int connectionFlags, CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }
        if (window == null) {
            throw new IllegalArgumentException("window must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            window.clear();
            return 0;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForCursorWindow(sql, bindArgs,
                    window, startPos, requiredPos, countAllRows,
                    cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Performs special reinterpretation of certain SQL statements such as "BEGIN",
     * "COMMIT" and "ROLLBACK" to ensure that transaction state invariants are
     * maintained.
     *
     * This function is mainly used to support legacy apps that perform their
     * own transactions by executing raw SQL rather than calling {@link #beginTransaction}
     * and the like.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return True if the statement was of a special form that was handled here,
     * false otherwise.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    private boolean executeSpecial(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        final int type = DatabaseUtils.getSqlStatementType(sql);
        switch (type) {
            case DatabaseUtils.STATEMENT_BEGIN:
                beginTransaction(TRANSACTION_MODE_EXCLUSIVE, null, connectionFlags,
                        cancellationSignal);
                return true;

            case DatabaseUtils.STATEMENT_COMMIT:
                setTransactionSuccessful();
                endTransaction(cancellationSignal);
                return true;

            case DatabaseUtils.STATEMENT_ABORT:
                endTransaction(cancellationSignal);
                return true;
        }
        return false;
    }

    private void acquireConnection(String sql, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (mConnection == null) {
            assert mConnectionUseCount == 0;
            mConnection = mConnectionPool.acquireConnection(sql, connectionFlags,
                    cancellationSignal); // might throw
            mConnectionFlags = connectionFlags;
        }
        mConnectionUseCount += 1;
    }

    private void releaseConnection() {
        assert mConnection != null;
        assert mConnectionUseCount > 0;
        if (--mConnectionUseCount == 0) {
            try {
                mConnectionPool.releaseConnection(mConnection); // might throw
            } finally {
                mConnection = null;
            }
        }
    }

    private void throwIfNoTransaction() {
        if (mTransactionStack == null) {
            throw new IllegalStateException("Cannot perform this operation because "
                    + "there is no current transaction.");
        }
    }

    private void throwIfTransactionMarkedSuccessful() {
        if (mTransactionStack != null && mTransactionStack.mMarkedSuccessful) {
            throw new IllegalStateException("Cannot perform this operation because "
                    + "the transaction has already been marked successful.  The only "
                    + "thing you can do now is call endTransaction().");
        }
    }

    private void throwIfNestedTransaction() {
        if (hasNestedTransaction()) {
            throw new IllegalStateException("Cannot perform this operation because "
                    + "a nested transaction is in progress.");
        }
    }

    private Transaction obtainTransaction(int mode, SQLiteTransactionListener listener) {
        Transaction transaction = mTransactionPool;
        if (transaction != null) {
            mTransactionPool = transaction.mParent;
            transaction.mParent = null;
            transaction.mMarkedSuccessful = false;
            transaction.mChildFailed = false;
        } else {
            transaction = new Transaction();
        }
        transaction.mMode = mode;
        transaction.mListener = listener;
        return transaction;
    }

    private void recycleTransaction(Transaction transaction) {
        transaction.mParent = mTransactionPool;
        transaction.mListener = null;
        mTransactionPool = transaction;
    }

    private static final class Transaction {
        public Transaction mParent;
        public int mMode;
        public SQLiteTransactionListener mListener;
        public boolean mMarkedSuccessful;
        public boolean mChildFailed;
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteStatement.java.













































































































































































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.os.ParcelFileDescriptor;

/**
 * Represents a statement that can be executed against a database.  The statement
 * cannot return multiple rows or columns, but single value (1 x 1) result sets
 * are supported.
 * <p>
 * This class is not thread-safe.
 * </p>
 */
public final class SQLiteStatement extends SQLiteProgram {
    SQLiteStatement(SQLiteDatabase db, String sql, Object[] bindArgs) {
        super(db, sql, bindArgs, null);
    }

    /**
     * Execute this SQL statement, if it is not a SELECT / INSERT / DELETE / UPDATE, for example
     * CREATE / DROP table, view, trigger, index etc.
     *
     * @throws org.sqlite.database.SQLException If the SQL string is invalid for
     *         some reason
     */
    public void execute() {
        acquireReference();
        try {
            getSession().execute(getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute this SQL statement, if the the number of rows affected by execution of this SQL
     * statement is of any importance to the caller - for example, UPDATE / DELETE SQL statements.
     *
     * @return the number of rows affected by this SQL statement execution.
     * @throws org.sqlite.database.SQLException If the SQL string is invalid for
     *         some reason
     */
    public int executeUpdateDelete() {
        acquireReference();
        try {
            return getSession().executeForChangedRowCount(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute this SQL statement and return the ID of the row inserted due to this call.
     * The SQL statement should be an INSERT for this to be a useful call.
     *
     * @return the row ID of the last row inserted, if this insert is successful. -1 otherwise.
     *
     * @throws org.sqlite.database.SQLException If the SQL string is invalid for
     *         some reason
     */
    public long executeInsert() {
        acquireReference();
        try {
            return getSession().executeForLastInsertedRowId(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute a statement that returns a 1 by 1 table with a numeric value.
     * For example, SELECT COUNT(*) FROM table;
     *
     * @return The result of the query.
     *
     * @throws org.sqlite.database.sqlite.SQLiteDoneException if the query returns zero rows
     */
    public long simpleQueryForLong() {
        acquireReference();
        try {
            return getSession().executeForLong(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute a statement that returns a 1 by 1 table with a text value.
     * For example, SELECT COUNT(*) FROM table;
     *
     * @return The result of the query.
     *
     * @throws org.sqlite.database.sqlite.SQLiteDoneException if the query returns zero rows
     */
    public String simpleQueryForString() {
        acquireReference();
        try {
            return getSession().executeForString(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Executes a statement that returns a 1 by 1 table with a blob value.
     *
     * @return A read-only file descriptor for a copy of the blob value, or {@code null}
     *         if the value is null or could not be read for some reason.
     *
     * @throws org.sqlite.database.sqlite.SQLiteDoneException if the query returns zero rows
     */
    public ParcelFileDescriptor simpleQueryForBlobFileDescriptor() {
        acquireReference();
        try {
            return getSession().executeForBlobFileDescriptor(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    @Override
    public String toString() {
        return "SQLiteProgram: " + getSql();
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteStatementInfo.java.

















































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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * Describes a SQLite statement.
 *
 * @hide
 */
public final class SQLiteStatementInfo {
    /**
     * The number of parameters that the statement has.
     */
    public int numParameters;

    /**
     * The names of all columns in the result set of the statement.
     */
    public String[] columnNames;

    /**
     * True if the statement is read-only.
     */
    public boolean readOnly;
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteTableLockedException.java.



































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

public class SQLiteTableLockedException extends SQLiteException {
    public SQLiteTableLockedException() {}

    public SQLiteTableLockedException(String error) {
        super(error);
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SQLiteTransactionListener.java.















































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/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

/**
 * A listener for transaction events.
 */
public interface SQLiteTransactionListener {
    /**
     * Called immediately after the transaction begins.
     */
    void onBegin();

    /**
     * Called immediately before commiting the transaction.
     */
    void onCommit();

    /**
     * Called if the transaction is about to be rolled back.
     */
    void onRollback();
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/SqliteWrapper.java.





















































































































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/*
 * Copyright (C) 2008 Esmertec AG.
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

package org.sqlite.database.sqlite;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import org.sqlite.database.sqlite.SQLiteException;
import android.net.Uri;
import android.util.Log;
import android.widget.Toast;

/**
 * @hide
 */

public final class SqliteWrapper {
    private static final String TAG = "SqliteWrapper";
    private static final String SQLITE_EXCEPTION_DETAIL_MESSAGE
                = "unable to open database file";

    private SqliteWrapper() {
        // Forbidden being instantiated.
    }

    // FIXME: need to optimize this method.
    private static boolean isLowMemory(SQLiteException e) {
        return e.getMessage().equals(SQLITE_EXCEPTION_DETAIL_MESSAGE);
    }

    public static void checkSQLiteException(Context context, SQLiteException e) {
        if (isLowMemory(e)) {
            Toast.makeText(context, "low memory", Toast.LENGTH_SHORT).show();
        } else {
            throw e;
        }
    }

    public static Cursor query(Context context, ContentResolver resolver, Uri uri,
            String[] projection, String selection, String[] selectionArgs, String sortOrder) {
        try {
            return resolver.query(uri, projection, selection, selectionArgs, sortOrder);
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when query: ", e);
            checkSQLiteException(context, e);
            return null;
        }
    }

    public static boolean requery(Context context, Cursor cursor) {
        try {
            return cursor.requery();
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when requery: ", e);
            checkSQLiteException(context, e);
            return false;
        }
    }
    public static int update(Context context, ContentResolver resolver, Uri uri,
            ContentValues values, String where, String[] selectionArgs) {
        try {
            return resolver.update(uri, values, where, selectionArgs);
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when update: ", e);
            checkSQLiteException(context, e);
            return -1;
        }
    }

    public static int delete(Context context, ContentResolver resolver, Uri uri,
            String where, String[] selectionArgs) {
        try {
            return resolver.delete(uri, where, selectionArgs);
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when delete: ", e);
            checkSQLiteException(context, e);
            return -1;
        }
    }

    public static Uri insert(Context context, ContentResolver resolver,
            Uri uri, ContentValues values) {
        try {
            return resolver.insert(uri, values);
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when insert: ", e);
            checkSQLiteException(context, e);
            return null;
        }
    }
}






Added sqlite3/src/main/java/org/sqlite/database/sqlite/package.html.


























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<HTML>
<BODY>
Contains the SQLite database management
classes that an application would use to manage its own private database.
<p>
Applications use these classes to manage private databases. If creating a
content provider, you will probably have to use these classes to create and
manage your own database to store content. See <a
href="{@docRoot}guide/topics/providers/content-providers.html">Content Providers</a> to learn
the conventions for implementing a content provider. See the
NotePadProvider class in the NotePad sample application in the SDK for an
example of a content provider. Android ships with SQLite version 3.4.0
<p>If you are working with data sent to you by a provider, you will not use
these SQLite classes, but instead use the generic {@link android.database}
classes.
<p>Android ships with the sqlite3 database tool in the <code>tools/</code>
folder. You can use this tool to browse or run SQL commands on the device. Run by
typing <code>sqlite3</code> in a shell window.
</BODY>
</HTML>






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LOCAL_PATH:= $(call my-dir)
include $(LOCAL_PATH)/sqlite/Android.mk







Added sqlite3/src/main/jni/Application.mk.







1

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APP_STL:=stlport_static






Added sqlite3/src/main/jni/sqlite/ALog-priv.h.


















































































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/*
 * Copyright 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

#ifndef NATIVEHELPER_ALOGPRIV_H_
#define NATIVEHELPER_ALOGPRIV_H_

#include <android/log.h>

#ifndef LOG_NDEBUG
#ifdef NDEBUG
#define LOG_NDEBUG 1
#else
#define LOG_NDEBUG 0
#endif
#endif


/*
 * Basic log message macros intended to emulate the behavior of log/log.h
 * in system core.  This should be dependent only on ndk exposed logging
 * functionality.
 */

#ifndef ALOG
#define ALOG(priority, tag, fmt...) \
    __android_log_print(ANDROID_##priority, tag, fmt)
#endif

#ifndef ALOGV
#if LOG_NDEBUG
#define ALOGV(...)   ((void)0)
#else
#define ALOGV(...) ((void)ALOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__))
#endif
#endif

#ifndef ALOGD
#define ALOGD(...) ((void)ALOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__))
#endif

#ifndef ALOGI
#define ALOGI(...) ((void)ALOG(LOG_INFO, LOG_TAG, __VA_ARGS__))
#endif

#ifndef ALOGW
#define ALOGW(...) ((void)ALOG(LOG_WARN, LOG_TAG, __VA_ARGS__))
#endif

#ifndef ALOGE
#define ALOGE(...) ((void)ALOG(LOG_ERROR, LOG_TAG, __VA_ARGS__))
#endif

/*
** Not quite the same as the core android LOG_FATAL_IF (which also
** sends a SIGTRAP), but close enough.
*/
#define LOG_FATAL_IF(bCond, zErr) if( bCond ) ALOGE(zErr);

#endif






Added sqlite3/src/main/jni/sqlite/Android.mk.

























































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LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

# If using SEE, uncomment the following:
# LOCAL_CFLAGS += -DSQLITE_HAS_CODEC


# Enable SQLite extensions.
LOCAL_CFLAGS += -DSQLITE_ENABLE_FTS5 
LOCAL_CFLAGS += -DSQLITE_ENABLE_RTREE
LOCAL_CFLAGS += -DSQLITE_ENABLE_JSON1
LOCAL_CFLAGS += -DSQLITE_ENABLE_FTS3

# This is important - it causes SQLite to use memory for temp files. Since 
# Android has no globally writable temp directory, if this is not defined the
# application throws an exception when it tries to create a temp file.
#
LOCAL_CFLAGS += -DSQLITE_TEMP_STORE=3

LOCAL_CFLAGS += -DHAVE_CONFIG_H -DKHTML_NO_EXCEPTIONS -DGKWQ_NO_JAVA
LOCAL_CFLAGS += -DNO_SUPPORT_JS_BINDING -DQT_NO_WHEELEVENT -DKHTML_NO_XBL
LOCAL_CFLAGS += -U__APPLE__
LOCAL_CFLAGS += -DHAVE_STRCHRNUL=0
LOCAL_CFLAGS += -Wno-unused-parameter -Wno-int-to-pointer-cast
LOCAL_CFLAGS += -Wno-maybe-uninitialized -Wno-parentheses
LOCAL_CPPFLAGS += -Wno-conversion-null


ifeq ($(TARGET_ARCH), arm)
	LOCAL_CFLAGS += -DPACKED="__attribute__ ((packed))"
else
	LOCAL_CFLAGS += -DPACKED=""
endif

LOCAL_SRC_FILES:=                             \
	android_database_SQLiteCommon.cpp     \
	android_database_SQLiteConnection.cpp \
	android_database_SQLiteGlobal.cpp     \
	android_database_SQLiteDebug.cpp      \
	JNIHelp.cpp JniConstants.cpp

LOCAL_SRC_FILES += sqlite3.c

LOCAL_C_INCLUDES += $(LOCAL_PATH) $(LOCAL_PATH)/nativehelper/

LOCAL_MODULE:= libsqliteX
LOCAL_LDLIBS += -ldl -llog 

include $(BUILD_SHARED_LIBRARY)







Added sqlite3/src/main/jni/sqlite/JNIHelp.cpp.



























































































































































































































































































































































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "JNIHelp"

#include "JniConstants.h"
#include "JNIHelp.h"
#include "ALog-priv.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>

#include <string>

/**
 * Equivalent to ScopedLocalRef, but for C_JNIEnv instead. (And slightly more powerful.)
 */
template<typename T>
class scoped_local_ref {
public:
    scoped_local_ref(C_JNIEnv* env, T localRef = NULL)
    : mEnv(env), mLocalRef(localRef)
    {
    }

    ~scoped_local_ref() {
        reset();
    }

    void reset(T localRef = NULL) {
        if (mLocalRef != NULL) {
            (*mEnv)->DeleteLocalRef(reinterpret_cast<JNIEnv*>(mEnv), mLocalRef);
            mLocalRef = localRef;
        }
    }

    T get() const {
        return mLocalRef;
    }

private:
    C_JNIEnv* mEnv;
    T mLocalRef;

    // Disallow copy and assignment.
    scoped_local_ref(const scoped_local_ref&);
    void operator=(const scoped_local_ref&);
};

static jclass findClass(C_JNIEnv* env, const char* className) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    return (*env)->FindClass(e, className);
}

extern "C" int jniRegisterNativeMethods(C_JNIEnv* env, const char* className,
    const JNINativeMethod* gMethods, int numMethods)
{
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    ALOGV("Registering %s's %d native methods...", className, numMethods);

    scoped_local_ref<jclass> c(env, findClass(env, className));
    if (c.get() == NULL) {
        char* msg;
        asprintf(&msg, "Native registration unable to find class '%s'; aborting...", className);
        e->FatalError(msg);
    }

    if ((*env)->RegisterNatives(e, c.get(), gMethods, numMethods) < 0) {
        char* msg;
        asprintf(&msg, "RegisterNatives failed for '%s'; aborting...", className);
        e->FatalError(msg);
    }

    return 0;
}

/*
 * Returns a human-readable summary of an exception object.  The buffer will
 * be populated with the "binary" class name and, if present, the
 * exception message.
 */
static bool getExceptionSummary(C_JNIEnv* env, jthrowable exception, std::string& result) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    /* get the name of the exception's class */
    scoped_local_ref<jclass> exceptionClass(env, (*env)->GetObjectClass(e, exception)); // can't fail
    scoped_local_ref<jclass> classClass(env,
            (*env)->GetObjectClass(e, exceptionClass.get())); // java.lang.Class, can't fail
    jmethodID classGetNameMethod =
            (*env)->GetMethodID(e, classClass.get(), "getName", "()Ljava/lang/String;");
    scoped_local_ref<jstring> classNameStr(env,
            (jstring) (*env)->CallObjectMethod(e, exceptionClass.get(), classGetNameMethod));
    if (classNameStr.get() == NULL) {
        (*env)->ExceptionClear(e);
        result = "<error getting class name>";
        return false;
    }
    const char* classNameChars = (*env)->GetStringUTFChars(e, classNameStr.get(), NULL);
    if (classNameChars == NULL) {
        (*env)->ExceptionClear(e);
        result = "<error getting class name UTF-8>";
        return false;
    }
    result += classNameChars;
    (*env)->ReleaseStringUTFChars(e, classNameStr.get(), classNameChars);

    /* if the exception has a detail message, get that */
    jmethodID getMessage =
            (*env)->GetMethodID(e, exceptionClass.get(), "getMessage", "()Ljava/lang/String;");
    scoped_local_ref<jstring> messageStr(env,
            (jstring) (*env)->CallObjectMethod(e, exception, getMessage));
    if (messageStr.get() == NULL) {
        return true;
    }

    result += ": ";

    const char* messageChars = (*env)->GetStringUTFChars(e, messageStr.get(), NULL);
    if (messageChars != NULL) {
        result += messageChars;
        (*env)->ReleaseStringUTFChars(e, messageStr.get(), messageChars);
    } else {
        result += "<error getting message>";
        (*env)->ExceptionClear(e); // clear OOM
    }

    return true;
}

/*
 * Returns an exception (with stack trace) as a string.
 */
static bool getStackTrace(C_JNIEnv* env, jthrowable exception, std::string& result) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    scoped_local_ref<jclass> stringWriterClass(env, findClass(env, "java/io/StringWriter"));
    if (stringWriterClass.get() == NULL) {
        return false;
    }

    jmethodID stringWriterCtor = (*env)->GetMethodID(e, stringWriterClass.get(), "<init>", "()V");
    jmethodID stringWriterToStringMethod =
            (*env)->GetMethodID(e, stringWriterClass.get(), "toString", "()Ljava/lang/String;");

    scoped_local_ref<jclass> printWriterClass(env, findClass(env, "java/io/PrintWriter"));
    if (printWriterClass.get() == NULL) {
        return false;
    }

    jmethodID printWriterCtor =
            (*env)->GetMethodID(e, printWriterClass.get(), "<init>", "(Ljava/io/Writer;)V");

    scoped_local_ref<jobject> stringWriter(env,
            (*env)->NewObject(e, stringWriterClass.get(), stringWriterCtor));
    if (stringWriter.get() == NULL) {
        return false;
    }

    jobject printWriter =
            (*env)->NewObject(e, printWriterClass.get(), printWriterCtor, stringWriter.get());
    if (printWriter == NULL) {
        return false;
    }

    scoped_local_ref<jclass> exceptionClass(env, (*env)->GetObjectClass(e, exception)); // can't fail
    jmethodID printStackTraceMethod =
            (*env)->GetMethodID(e, exceptionClass.get(), "printStackTrace", "(Ljava/io/PrintWriter;)V");
    (*env)->CallVoidMethod(e, exception, printStackTraceMethod, printWriter);

    if ((*env)->ExceptionCheck(e)) {
        return false;
    }

    scoped_local_ref<jstring> messageStr(env,
            (jstring) (*env)->CallObjectMethod(e, stringWriter.get(), stringWriterToStringMethod));
    if (messageStr.get() == NULL) {
        return false;
    }

    const char* utfChars = (*env)->GetStringUTFChars(e, messageStr.get(), NULL);
    if (utfChars == NULL) {
        return false;
    }

    result = utfChars;

    (*env)->ReleaseStringUTFChars(e, messageStr.get(), utfChars);
    return true;
}

extern "C" int jniThrowException(C_JNIEnv* env, const char* className, const char* msg) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    if ((*env)->ExceptionCheck(e)) {
        /* TODO: consider creating the new exception with this as "cause" */
        scoped_local_ref<jthrowable> exception(env, (*env)->ExceptionOccurred(e));
        (*env)->ExceptionClear(e);

        if (exception.get() != NULL) {
            std::string text;
            getExceptionSummary(env, exception.get(), text);
            ALOGW("Discarding pending exception (%s) to throw %s", text.c_str(), className);
        }
    }

    scoped_local_ref<jclass> exceptionClass(env, findClass(env, className));
    if (exceptionClass.get() == NULL) {
        ALOGE("Unable to find exception class %s", className);
        /* ClassNotFoundException now pending */
        return -1;
    }

    if ((*env)->ThrowNew(e, exceptionClass.get(), msg) != JNI_OK) {
        ALOGE("Failed throwing '%s' '%s'", className, msg);
        /* an exception, most likely OOM, will now be pending */
        return -1;
    }

    return 0;
}

int jniThrowExceptionFmt(C_JNIEnv* env, const char* className, const char* fmt, va_list args) {
    char msgBuf[512];
    vsnprintf(msgBuf, sizeof(msgBuf), fmt, args);
    return jniThrowException(env, className, msgBuf);
}

int jniThrowNullPointerException(C_JNIEnv* env, const char* msg) {
    return jniThrowException(env, "java/lang/NullPointerException", msg);
}

int jniThrowRuntimeException(C_JNIEnv* env, const char* msg) {
    return jniThrowException(env, "java/lang/RuntimeException", msg);
}

int jniThrowIOException(C_JNIEnv* env, int errnum) {
    char buffer[80];
    const char* message = jniStrError(errnum, buffer, sizeof(buffer));
    return jniThrowException(env, "java/io/IOException", message);
}

static std::string jniGetStackTrace(C_JNIEnv* env, jthrowable exception) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);

    scoped_local_ref<jthrowable> currentException(env, (*env)->ExceptionOccurred(e));
    if (exception == NULL) {
        exception = currentException.get();
        if (exception == NULL) {
          return "<no pending exception>";
        }
    }

    if (currentException.get() != NULL) {
        (*env)->ExceptionClear(e);
    }

    std::string trace;
    if (!getStackTrace(env, exception, trace)) {
        (*env)->ExceptionClear(e);
        getExceptionSummary(env, exception, trace);
    }

    if (currentException.get() != NULL) {
        (*env)->Throw(e, currentException.get()); // rethrow
    }

    return trace;
}

void jniLogException(C_JNIEnv* env, int priority, const char* tag, jthrowable exception) {
    std::string trace(jniGetStackTrace(env, exception));
    __android_log_write(priority, tag, trace.c_str());
}

const char* jniStrError(int errnum, char* buf, size_t buflen) {
#if __GLIBC__
    // Note: glibc has a nonstandard strerror_r that returns char* rather than POSIX's int.
    // char *strerror_r(int errnum, char *buf, size_t n);
    return strerror_r(errnum, buf, buflen);
#else
    int rc = strerror_r(errnum, buf, buflen);
    if (rc != 0) {
        // (POSIX only guarantees a value other than 0. The safest
        // way to implement this function is to use C++ and overload on the
        // type of strerror_r to accurately distinguish GNU from POSIX.)
        snprintf(buf, buflen, "errno %d", errnum);
    }
    return buf;
#endif
}

jobject jniCreateFileDescriptor(C_JNIEnv* env, int fd) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    static jmethodID ctor = e->GetMethodID(JniConstants::fileDescriptorClass, "<init>", "()V");
    jobject fileDescriptor = (*env)->NewObject(e, JniConstants::fileDescriptorClass, ctor);
    // NOTE: NewObject ensures that an OutOfMemoryError will be seen by the Java
    // caller if the alloc fails, so we just return NULL when that happens.
    if (fileDescriptor != NULL)  {
        jniSetFileDescriptorOfFD(env, fileDescriptor, fd);
    }
    return fileDescriptor;
}

int jniGetFDFromFileDescriptor(C_JNIEnv* env, jobject fileDescriptor) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    static jfieldID fid = e->GetFieldID(JniConstants::fileDescriptorClass, "descriptor", "I");
    if (fileDescriptor != NULL) {
        return (*env)->GetIntField(e, fileDescriptor, fid);
    } else {
        return -1;
    }
}

void jniSetFileDescriptorOfFD(C_JNIEnv* env, jobject fileDescriptor, int value) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    static jfieldID fid = e->GetFieldID(JniConstants::fileDescriptorClass, "descriptor", "I");
    (*env)->SetIntField(e, fileDescriptor, fid, value);
}

jobject jniGetReferent(C_JNIEnv* env, jobject ref) {
    JNIEnv* e = reinterpret_cast<JNIEnv*>(env);
    static jmethodID get = e->GetMethodID(JniConstants::referenceClass, "get", "()Ljava/lang/Object;");
    return (*env)->CallObjectMethod(e, ref, get);
}







Added sqlite3/src/main/jni/sqlite/JniConstants.cpp.

















































































































































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define LOG_TAG "JniConstants"

#include "ALog-priv.h"
#include "JniConstants.h"
#include "ScopedLocalRef.h"

#include <stdlib.h>

jclass JniConstants::bidiRunClass;
jclass JniConstants::bigDecimalClass;
jclass JniConstants::booleanClass;
jclass JniConstants::byteArrayClass;
jclass JniConstants::byteClass;
jclass JniConstants::calendarClass;
jclass JniConstants::characterClass;
jclass JniConstants::charsetICUClass;
jclass JniConstants::constructorClass;
jclass JniConstants::deflaterClass;
jclass JniConstants::doubleClass;
jclass JniConstants::errnoExceptionClass;
jclass JniConstants::fieldClass;
jclass JniConstants::fieldPositionIteratorClass;
jclass JniConstants::fileDescriptorClass;
jclass JniConstants::floatClass;
jclass JniConstants::gaiExceptionClass;
jclass JniConstants::inet6AddressClass;
jclass JniConstants::inetAddressClass;
jclass JniConstants::inetSocketAddressClass;
jclass JniConstants::inetUnixAddressClass;
jclass JniConstants::inflaterClass;
jclass JniConstants::inputStreamClass;
jclass JniConstants::integerClass;
jclass JniConstants::localeDataClass;
jclass JniConstants::longClass;
jclass JniConstants::methodClass;
jclass JniConstants::mutableIntClass;
jclass JniConstants::mutableLongClass;
jclass JniConstants::objectClass;
jclass JniConstants::objectArrayClass;
jclass JniConstants::outputStreamClass;
jclass JniConstants::parsePositionClass;
jclass JniConstants::patternSyntaxExceptionClass;
jclass JniConstants::realToStringClass;
jclass JniConstants::referenceClass;
jclass JniConstants::shortClass;
jclass JniConstants::socketClass;
jclass JniConstants::socketImplClass;
jclass JniConstants::stringClass;
jclass JniConstants::structAddrinfoClass;
jclass JniConstants::structFlockClass;
jclass JniConstants::structGroupReqClass;
jclass JniConstants::structLingerClass;
jclass JniConstants::structPasswdClass;
jclass JniConstants::structPollfdClass;
jclass JniConstants::structStatClass;
jclass JniConstants::structStatVfsClass;
jclass JniConstants::structTimevalClass;
jclass JniConstants::structUcredClass;
jclass JniConstants::structUtsnameClass;

static jclass findClass(JNIEnv* env, const char* name) {
    ScopedLocalRef<jclass> localClass(env, env->FindClass(name));
    jclass result = reinterpret_cast<jclass>(env->NewGlobalRef(localClass.get()));
    if (result == NULL) {
        ALOGE("failed to find class '%s'", name);
        abort();
    }
    return result;
}

void JniConstants::init(JNIEnv* env) {
    bidiRunClass = findClass(env, "java/text/Bidi$Run");
    bigDecimalClass = findClass(env, "java/math/BigDecimal");
    booleanClass = findClass(env, "java/lang/Boolean");
    byteClass = findClass(env, "java/lang/Byte");
    byteArrayClass = findClass(env, "[B");
    calendarClass = findClass(env, "java/util/Calendar");
    characterClass = findClass(env, "java/lang/Character");
    charsetICUClass = findClass(env, "java/nio/charset/CharsetICU");
    constructorClass = findClass(env, "java/lang/reflect/Constructor");
    floatClass = findClass(env, "java/lang/Float");
    deflaterClass = findClass(env, "java/util/zip/Deflater");
    doubleClass = findClass(env, "java/lang/Double");
    errnoExceptionClass = findClass(env, "libcore/io/ErrnoException");
    fieldClass = findClass(env, "java/lang/reflect/Field");
    fieldPositionIteratorClass = findClass(env, "libcore/icu/NativeDecimalFormat$FieldPositionIterator");
    fileDescriptorClass = findClass(env, "java/io/FileDescriptor");
    gaiExceptionClass = findClass(env, "libcore/io/GaiException");
    inet6AddressClass = findClass(env, "java/net/Inet6Address");
    inetAddressClass = findClass(env, "java/net/InetAddress");
    inetSocketAddressClass = findClass(env, "java/net/InetSocketAddress");
    inetUnixAddressClass = findClass(env, "java/net/InetUnixAddress");
    inflaterClass = findClass(env, "java/util/zip/Inflater");
    inputStreamClass = findClass(env, "java/io/InputStream");
    integerClass = findClass(env, "java/lang/Integer");
    localeDataClass = findClass(env, "libcore/icu/LocaleData");
    longClass = findClass(env, "java/lang/Long");
    methodClass = findClass(env, "java/lang/reflect/Method");
    mutableIntClass = findClass(env, "libcore/util/MutableInt");
    mutableLongClass = findClass(env, "libcore/util/MutableLong");
    objectClass = findClass(env, "java/lang/Object");
    objectArrayClass = findClass(env, "[Ljava/lang/Object;");
    outputStreamClass = findClass(env, "java/io/OutputStream");
    parsePositionClass = findClass(env, "java/text/ParsePosition");
    patternSyntaxExceptionClass = findClass(env, "java/util/regex/PatternSyntaxException");
    realToStringClass = findClass(env, "java/lang/RealToString");
    referenceClass = findClass(env, "java/lang/ref/Reference");
    shortClass = findClass(env, "java/lang/Short");
    socketClass = findClass(env, "java/net/Socket");
    socketImplClass = findClass(env, "java/net/SocketImpl");
    stringClass = findClass(env, "java/lang/String");
    structAddrinfoClass = findClass(env, "libcore/io/StructAddrinfo");
    structFlockClass = findClass(env, "libcore/io/StructFlock");
    structGroupReqClass = findClass(env, "libcore/io/StructGroupReq");
    structLingerClass = findClass(env, "libcore/io/StructLinger");
    structPasswdClass = findClass(env, "libcore/io/StructPasswd");
    structPollfdClass = findClass(env, "libcore/io/StructPollfd");
    structStatClass = findClass(env, "libcore/io/StructStat");
    structStatVfsClass = findClass(env, "libcore/io/StructStatVfs");
    structTimevalClass = findClass(env, "libcore/io/StructTimeval");
    structUcredClass = findClass(env, "libcore/io/StructUcred");
    structUtsnameClass = findClass(env, "libcore/io/StructUtsname");
}






Added sqlite3/src/main/jni/sqlite/README.














































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All the files in this directory are copied from stock android. The following
files:

JniConstants.cpp
JNIHelp.cpp
ALog-priv.h

are copied in from Android's libnativehelper module (altogether less than 1000
lines of code). The remainder are from the core framework (directory
/frameworks/base/core/jni).

Notes on changes:

The ashmem_XXX() interfaces are used for the various "xxxForBlobDescriptor()"
API functions. The code in libcutils for this seems to be platform
dependent - some platforms have kernel support, others have a user space
implementation. So these functions are not supported for now.

The original SQLiteConnection.cpp uses AndroidRuntime::genJNIEnv() to obtain a
pointer to the current threads environment. Changed to store a pointer to the
process JavaVM (Android allows only one) as a global variable. Then retrieve
the JNIEnv as needed using GetEnv().

Replaced uses of class String8 with std::string in SQLiteConnection.cpp and a
few other places.

The stock Android code to populate CursorWindow containers with the results of
a SELECT statement uses a C++ interface that is not available to NDK builds. So
this code is rewritten to call the CursorWindow java interface via JNI methods.
This is the largest source code change. See function 
nativeExecuteForCursorWindow() in file android_database_SQLiteConnection.cpp
for details.

The "LOCALIZED" collation and some miscellaneous user-functions added by the
sqlite3_android.cpp module are not included. A collation called LOCALIZED
that is equivalent to BINARY is added instead to keep various things working.
This should not cause serious problems - class SQLiteConnection always
runs "REINDEX LOCALIZED" immediately after opening a connection.







Added sqlite3/src/main/jni/sqlite/android_database_SQLiteCommon.cpp.
















































































































































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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

#include "android_database_SQLiteCommon.h"

namespace android {

/* throw a SQLiteException with a message appropriate for the error in handle */
void throw_sqlite3_exception(JNIEnv* env, sqlite3* handle) {
    throw_sqlite3_exception(env, handle, NULL);
}

/* throw a SQLiteException with the given message */
void throw_sqlite3_exception(JNIEnv* env, const char* message) {
    throw_sqlite3_exception(env, NULL, message);
}

/* throw a SQLiteException with a message appropriate for the error in handle
   concatenated with the given message
 */
void throw_sqlite3_exception(JNIEnv* env, sqlite3* handle, const char* message) {
    if (handle) {
        // get the error code and message from the SQLite connection
        // the error message may contain more information than the error code
        // because it is based on the extended error code rather than the simplified
        // error code that SQLite normally returns.
        throw_sqlite3_exception(env, sqlite3_extended_errcode(handle),
                sqlite3_errmsg(handle), message);
    } else {
        // we use SQLITE_OK so that a generic SQLiteException is thrown;
        // any code not specified in the switch statement below would do.
        throw_sqlite3_exception(env, SQLITE_OK, "unknown error", message);
    }
}

/* throw a SQLiteException for a given error code
 * should only be used when the database connection is not available because the
 * error information will not be quite as rich */
void throw_sqlite3_exception_errcode(JNIEnv* env, int errcode, const char* message) {
    throw_sqlite3_exception(env, errcode, "unknown error", message);
}

/* throw a SQLiteException for a given error code, sqlite3message, and
   user message
 */
void throw_sqlite3_exception(JNIEnv* env, int errcode,
                             const char* sqlite3Message, const char* message) {
    const char* exceptionClass;
    switch (errcode & 0xff) { /* mask off extended error code */
        case SQLITE_IOERR:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDiskIOException";
            break;
        case SQLITE_CORRUPT:
        case SQLITE_NOTADB: // treat "unsupported file format" error as corruption also
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDatabaseCorruptException";
            break;
        case SQLITE_CONSTRAINT:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteConstraintException";
            break;
        case SQLITE_ABORT:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteAbortException";
            break;
        case SQLITE_DONE:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDoneException";
            sqlite3Message = NULL; // SQLite error message is irrelevant in this case
            break;
        case SQLITE_FULL:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteFullException";
            break;
        case SQLITE_MISUSE:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteMisuseException";
            break;
        case SQLITE_PERM:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteAccessPermException";
            break;
        case SQLITE_BUSY:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDatabaseLockedException";
            break;
        case SQLITE_LOCKED:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteTableLockedException";
            break;
        case SQLITE_READONLY:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteReadOnlyDatabaseException";
            break;
        case SQLITE_CANTOPEN:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteCantOpenDatabaseException";
            break;
        case SQLITE_TOOBIG:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteBlobTooBigException";
            break;
        case SQLITE_RANGE:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteBindOrColumnIndexOutOfRangeException";
            break;
        case SQLITE_NOMEM:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteOutOfMemoryException";
            break;
        case SQLITE_MISMATCH:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteDatatypeMismatchException";
            break;
        case SQLITE_INTERRUPT:
            exceptionClass = "android/os/OperationCanceledException";
            break;
        default:
            exceptionClass = "org/sqlite/database/sqlite/SQLiteException";
            break;
    }

    if (sqlite3Message) {
        char *zFullmsg = sqlite3_mprintf(
            "%s (code %d)%s%s", sqlite3Message, errcode, 
            (message ? ": " : ""), (message ? message : "")
        );
        jniThrowException(env, exceptionClass, zFullmsg);
        sqlite3_free(zFullmsg);
    } else {
        jniThrowException(env, exceptionClass, message);
    }
}


} // namespace android






Added sqlite3/src/main/jni/sqlite/android_database_SQLiteCommon.h.





























































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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

#ifndef _ANDROID_DATABASE_SQLITE_COMMON_H
#define _ANDROID_DATABASE_SQLITE_COMMON_H

#include <jni.h>
#include <JNIHelp.h>

#include <sqlite3.h>

// Special log tags defined in SQLiteDebug.java.
#define SQLITE_LOG_TAG "SQLiteLog"
#define SQLITE_TRACE_TAG "SQLiteStatements"
#define SQLITE_PROFILE_TAG "SQLiteTime"

namespace android {

/* throw a SQLiteException with a message appropriate for the error in handle */
void throw_sqlite3_exception(JNIEnv* env, sqlite3* handle);

/* throw a SQLiteException with the given message */
void throw_sqlite3_exception(JNIEnv* env, const char* message);

/* throw a SQLiteException with a message appropriate for the error in handle
   concatenated with the given message
 */
void throw_sqlite3_exception(JNIEnv* env, sqlite3* handle, const char* message);

/* throw a SQLiteException for a given error code */
void throw_sqlite3_exception_errcode(JNIEnv* env, int errcode, const char* message);

void throw_sqlite3_exception(JNIEnv* env, int errcode,
        const char* sqlite3Message, const char* message);

}

#endif // _ANDROID_DATABASE_SQLITE_COMMON_H






Added sqlite3/src/main/jni/sqlite/android_database_SQLiteConnection.cpp.



























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

#define LOG_TAG "SQLiteConnection"

#include <jni.h>
#include <JNIHelp.h>
#include "ALog-priv.h"


#include <sys/mman.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>

#if 0
#include <androidfw/CursorWindow.h>
#endif

#include <sqlite3.h>
#if 0
#include <sqlite3_android.h>
#endif

#include "android_database_SQLiteCommon.h"

#include <string>

// Set to 1 to use UTF16 storage for localized indexes.
#define UTF16_STORAGE 0

namespace android {

/* Busy timeout in milliseconds.
 * If another connection (possibly in another process) has the database locked for
 * longer than this amount of time then SQLite will generate a SQLITE_BUSY error.
 * The SQLITE_BUSY error is then raised as a SQLiteDatabaseLockedException.
 *
 * In ordinary usage, busy timeouts are quite rare.  Most databases only ever
 * have a single open connection at a time unless they are using WAL.  When using
 * WAL, a timeout could occur if one connection is busy performing an auto-checkpoint
 * operation.  The busy timeout needs to be long enough to tolerate slow I/O write
 * operations but not so long as to cause the application to hang indefinitely if
 * there is a problem acquiring a database lock.
 */
static const int BUSY_TIMEOUT_MS = 2500;

static JavaVM *gpJavaVM = 0;

static struct {
    jfieldID name;
    jfieldID numArgs;
    jmethodID dispatchCallback;
} gSQLiteCustomFunctionClassInfo;

static struct {
    jclass clazz;
} gStringClassInfo;

struct SQLiteConnection {
    // Open flags.
    // Must be kept in sync with the constants defined in SQLiteDatabase.java.
    enum {
        OPEN_READWRITE          = 0x00000000,
        OPEN_READONLY           = 0x00000001,
        OPEN_READ_MASK          = 0x00000001,
        NO_LOCALIZED_COLLATORS  = 0x00000010,
        CREATE_IF_NECESSARY     = 0x10000000,
    };

    sqlite3* const db;
    const int openFlags;
    std::string path;
    std::string label;

    volatile bool canceled;

    SQLiteConnection(sqlite3* db, int openFlags, const std::string& path, const std::string& label) :
        db(db), openFlags(openFlags), path(path), label(label), canceled(false) { }
};

// Called each time a statement begins execution, when tracing is enabled.
static void sqliteTraceCallback(void *data, const char *sql) {
    SQLiteConnection* connection = static_cast<SQLiteConnection*>(data);
    ALOG(LOG_VERBOSE, SQLITE_TRACE_TAG, "%s: \"%s\"\n",
            connection->label.c_str(), sql);
}

// Called each time a statement finishes execution, when profiling is enabled.
static void sqliteProfileCallback(void *data, const char *sql, sqlite3_uint64 tm) {
    SQLiteConnection* connection = static_cast<SQLiteConnection*>(data);
    ALOG(LOG_VERBOSE, SQLITE_PROFILE_TAG, "%s: \"%s\" took %0.3f ms\n",
            connection->label.c_str(), sql, tm * 0.000001f);
}

// Called after each SQLite VM instruction when cancelation is enabled.
static int sqliteProgressHandlerCallback(void* data) {
    SQLiteConnection* connection = static_cast<SQLiteConnection*>(data);
    return connection->canceled;
}

/*
** This function is a collation sequence callback equivalent to the built-in
** BINARY sequence. 
**
** Stock Android uses a modified version of sqlite3.c that calls out to a module
** named "sqlite3_android" to add extra built-in collations and functions to
** all database handles. Specifically, collation sequence "LOCALIZED". For now,
** this module does not include sqlite3_android (since it is difficult to build
** with the NDK only). Instead, this function is registered as "LOCALIZED" for all
** new database handles. 
*/
static int coll_localized(
  void *not_used,
  int nKey1, const void *pKey1,
  int nKey2, const void *pKey2
){
  int rc, n;
  n = nKey1<nKey2 ? nKey1 : nKey2;
  rc = memcmp(pKey1, pKey2, n);
  if( rc==0 ){
    rc = nKey1 - nKey2;
  }
  return rc;
}

static jlong nativeOpen(JNIEnv* env, jclass clazz, jstring pathStr, jint openFlags,
        jstring labelStr, jboolean enableTrace, jboolean enableProfile) {
    int sqliteFlags;
    if (openFlags & SQLiteConnection::CREATE_IF_NECESSARY) {
        sqliteFlags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
    } else if (openFlags & SQLiteConnection::OPEN_READONLY) {
        sqliteFlags = SQLITE_OPEN_READONLY;
    } else {
        sqliteFlags = SQLITE_OPEN_READWRITE;
    }

    const char* pathChars = env->GetStringUTFChars(pathStr, NULL);
    std::string path(pathChars);
    env->ReleaseStringUTFChars(pathStr, pathChars);

    const char* labelChars = env->GetStringUTFChars(labelStr, NULL);
    std::string label(labelChars);
    env->ReleaseStringUTFChars(labelStr, labelChars);

    sqlite3* db;
    int err = sqlite3_open_v2(path.c_str(), &db, sqliteFlags, NULL);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception_errcode(env, err, "Could not open database");
        return 0;
    }
    err = sqlite3_create_collation(db, "localized", SQLITE_UTF8, 0, coll_localized);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception_errcode(env, err, "Could not register collation");
        sqlite3_close(db);
        return 0;
    }

    // Check that the database is really read/write when that is what we asked for.
    if ((sqliteFlags & SQLITE_OPEN_READWRITE) && sqlite3_db_readonly(db, NULL)) {
        throw_sqlite3_exception(env, db, "Could not open the database in read/write mode.");
        sqlite3_close(db);
        return 0;
    }

    // Set the default busy handler to retry automatically before returning SQLITE_BUSY.
    err = sqlite3_busy_timeout(db, BUSY_TIMEOUT_MS);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, db, "Could not set busy timeout");
        sqlite3_close(db);
        return 0;
    }

    // Register custom Android functions.
#if 0
    err = register_android_functions(db, UTF16_STORAGE);
    if (err) {
        throw_sqlite3_exception(env, db, "Could not register Android SQL functions.");
        sqlite3_close(db);
        return 0;
    }
#endif

    // Create wrapper object.
    SQLiteConnection* connection = new SQLiteConnection(db, openFlags, path, label);

    // Enable tracing and profiling if requested.
    if (enableTrace) {
        sqlite3_trace(db, &sqliteTraceCallback, connection);
    }
    if (enableProfile) {
        sqlite3_profile(db, &sqliteProfileCallback, connection);
    }

    ALOGV("Opened connection %p with label '%s'", db, label.c_str());
    return reinterpret_cast<jlong>(connection);
}

static void nativeClose(JNIEnv* env, jclass clazz, jlong connectionPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    if (connection) {
        ALOGV("Closing connection %p", connection->db);
        int err = sqlite3_close(connection->db);
        if (err != SQLITE_OK) {
            // This can happen if sub-objects aren't closed first.  Make sure the caller knows.
            ALOGE("sqlite3_close(%p) failed: %d", connection->db, err);
            throw_sqlite3_exception(env, connection->db, "Count not close db.");
            return;
        }

        delete connection;
    }
}

// Called each time a custom function is evaluated.
static void sqliteCustomFunctionCallback(sqlite3_context *context,
        int argc, sqlite3_value **argv) {

    JNIEnv* env = 0;
    gpJavaVM->GetEnv((void**)&env, JNI_VERSION_1_4);

    // Get the callback function object.
    // Create a new local reference to it in case the callback tries to do something
    // dumb like unregister the function (thereby destroying the global ref) while it is running.
    jobject functionObjGlobal = reinterpret_cast<jobject>(sqlite3_user_data(context));
    jobject functionObj = env->NewLocalRef(functionObjGlobal);

    jobjectArray argsArray = env->NewObjectArray(argc, gStringClassInfo.clazz, NULL);
    if (argsArray) {
        for (int i = 0; i < argc; i++) {
            const jchar* arg = static_cast<const jchar*>(sqlite3_value_text16(argv[i]));
            if (!arg) {
                ALOGW("NULL argument in custom_function_callback.  This should not happen.");
            } else {
                size_t argLen = sqlite3_value_bytes16(argv[i]) / sizeof(jchar);
                jstring argStr = env->NewString(arg, argLen);
                if (!argStr) {
                    goto error; // out of memory error
                }
                env->SetObjectArrayElement(argsArray, i, argStr);
                env->DeleteLocalRef(argStr);
            }
        }

        // TODO: Support functions that return values.
        env->CallVoidMethod(functionObj,
                gSQLiteCustomFunctionClassInfo.dispatchCallback, argsArray);

error:
        env->DeleteLocalRef(argsArray);
    }

    env->DeleteLocalRef(functionObj);

    if (env->ExceptionCheck()) {
        ALOGE("An exception was thrown by custom SQLite function.");
        /* LOGE_EX(env); */
        env->ExceptionClear();
    }
}

// Called when a custom function is destroyed.
static void sqliteCustomFunctionDestructor(void* data) {
    jobject functionObjGlobal = reinterpret_cast<jobject>(data);
    JNIEnv* env = 0;
    gpJavaVM->GetEnv((void**)&env, JNI_VERSION_1_4);
    env->DeleteGlobalRef(functionObjGlobal);
}

static void nativeRegisterCustomFunction(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jobject functionObj) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    jstring nameStr = jstring(env->GetObjectField(
            functionObj, gSQLiteCustomFunctionClassInfo.name));
    jint numArgs = env->GetIntField(functionObj, gSQLiteCustomFunctionClassInfo.numArgs);

    jobject functionObjGlobal = env->NewGlobalRef(functionObj);

    const char* name = env->GetStringUTFChars(nameStr, NULL);
    int err = sqlite3_create_function_v2(connection->db, name, numArgs, SQLITE_UTF16,
            reinterpret_cast<void*>(functionObjGlobal),
            &sqliteCustomFunctionCallback, NULL, NULL, &sqliteCustomFunctionDestructor);
    env->ReleaseStringUTFChars(nameStr, name);

    if (err != SQLITE_OK) {
        ALOGE("sqlite3_create_function returned %d", err);
        env->DeleteGlobalRef(functionObjGlobal);
        throw_sqlite3_exception(env, connection->db);
        return;
    }
}

static void nativeRegisterLocalizedCollators(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jstring localeStr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    const char* locale = env->GetStringUTFChars(localeStr, NULL);
#if 0
    int err = register_localized_collators(connection->db, locale, UTF16_STORAGE);
    env->ReleaseStringUTFChars(localeStr, locale);

    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db);
    }
#endif
}

static jlong nativePrepareStatement(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jstring sqlString) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    jsize sqlLength = env->GetStringLength(sqlString);
    const jchar* sql = env->GetStringCritical(sqlString, NULL);
    sqlite3_stmt* statement;
    int err = sqlite3_prepare16_v2(connection->db,
            sql, sqlLength * sizeof(jchar), &statement, NULL);
    env->ReleaseStringCritical(sqlString, sql);

    if (err != SQLITE_OK) {
        // Error messages like 'near ")": syntax error' are not
        // always helpful enough, so construct an error string that
        // includes the query itself.
        const char *query = env->GetStringUTFChars(sqlString, NULL);
        char *message = (char*) malloc(strlen(query) + 50);
        if (message) {
            strcpy(message, ", while compiling: "); // less than 50 chars
            strcat(message, query);
        }
        env->ReleaseStringUTFChars(sqlString, query);
        throw_sqlite3_exception(env, connection->db, message);
        free(message);
        return 0;
    }

    ALOGV("Prepared statement %p on connection %p", statement, connection->db);
    return reinterpret_cast<jlong>(statement);
}

static void nativeFinalizeStatement(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    // We ignore the result of sqlite3_finalize because it is really telling us about
    // whether any errors occurred while executing the statement.  The statement itself
    // is always finalized regardless.
    ALOGV("Finalized statement %p on connection %p", statement, connection->db);
    sqlite3_finalize(statement);
}

static jint nativeGetParameterCount(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    return sqlite3_bind_parameter_count(statement);
}

static jboolean nativeIsReadOnly(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    return sqlite3_stmt_readonly(statement) != 0;
}

static jint nativeGetColumnCount(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    return sqlite3_column_count(statement);
}

static jstring nativeGetColumnName(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr, jint index) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    const jchar* name = static_cast<const jchar*>(sqlite3_column_name16(statement, index));
    if (name) {
        size_t length = 0;
        while (name[length]) {
            length += 1;
        }
        return env->NewString(name, length);
    }
    return NULL;
}

static void nativeBindNull(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr, jint index) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = sqlite3_bind_null(statement, index);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeBindLong(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr, jint index, jlong value) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = sqlite3_bind_int64(statement, index, value);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeBindDouble(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr, jint index, jdouble value) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = sqlite3_bind_double(statement, index, value);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeBindString(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr, jint index, jstring valueString) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    jsize valueLength = env->GetStringLength(valueString);
    const jchar* value = env->GetStringCritical(valueString, NULL);
    int err = sqlite3_bind_text16(statement, index, value, valueLength * sizeof(jchar),
            SQLITE_TRANSIENT);
    env->ReleaseStringCritical(valueString, value);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeBindBlob(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr, jint index, jbyteArray valueArray) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    jsize valueLength = env->GetArrayLength(valueArray);
    jbyte* value = static_cast<jbyte*>(env->GetPrimitiveArrayCritical(valueArray, NULL));
    int err = sqlite3_bind_blob(statement, index, value, valueLength, SQLITE_TRANSIENT);
    env->ReleasePrimitiveArrayCritical(valueArray, value, JNI_ABORT);
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static void nativeResetStatementAndClearBindings(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = sqlite3_reset(statement);
    if (err == SQLITE_OK) {
        err = sqlite3_clear_bindings(statement);
    }
    if (err != SQLITE_OK) {
        throw_sqlite3_exception(env, connection->db, NULL);
    }
}

static int executeNonQuery(JNIEnv* env, SQLiteConnection* connection, sqlite3_stmt* statement) {
    int err = sqlite3_step(statement);
    if (err == SQLITE_ROW) {
        throw_sqlite3_exception(env,
                "Queries can be performed using SQLiteDatabase query or rawQuery methods only.");
    } else if (err != SQLITE_DONE) {
        throw_sqlite3_exception(env, connection->db);
    }
    return err;
}

static void nativeExecute(JNIEnv* env, jclass clazz, jlong connectionPtr,
        jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    executeNonQuery(env, connection, statement);
}

static jint nativeExecuteForChangedRowCount(JNIEnv* env, jclass clazz,
        jlong connectionPtr, jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeNonQuery(env, connection, statement);
    return err == SQLITE_DONE ? sqlite3_changes(connection->db) : -1;
}

static jlong nativeExecuteForLastInsertedRowId(JNIEnv* env, jclass clazz,
        jlong connectionPtr, jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeNonQuery(env, connection, statement);
    return err == SQLITE_DONE && sqlite3_changes(connection->db) > 0
            ? sqlite3_last_insert_rowid(connection->db) : -1;
}

static int executeOneRowQuery(JNIEnv* env, SQLiteConnection* connection, sqlite3_stmt* statement) {
    int err = sqlite3_step(statement);
    if (err != SQLITE_ROW) {
        throw_sqlite3_exception(env, connection->db);
    }
    return err;
}

static jlong nativeExecuteForLong(JNIEnv* env, jclass clazz,
        jlong connectionPtr, jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeOneRowQuery(env, connection, statement);
    if (err == SQLITE_ROW && sqlite3_column_count(statement) >= 1) {
        return sqlite3_column_int64(statement, 0);
    }
    return -1;
}

static jstring nativeExecuteForString(JNIEnv* env, jclass clazz,
        jlong connectionPtr, jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeOneRowQuery(env, connection, statement);
    if (err == SQLITE_ROW && sqlite3_column_count(statement) >= 1) {
        const jchar* text = static_cast<const jchar*>(sqlite3_column_text16(statement, 0));
        if (text) {
            size_t length = sqlite3_column_bytes16(statement, 0) / sizeof(jchar);
            return env->NewString(text, length);
        }
    }
    return NULL;
}

static int createAshmemRegionWithData(JNIEnv* env, const void* data, size_t length) {
#if 0
    int error = 0;
    int fd = ashmem_create_region(NULL, length);
    if (fd < 0) {
        error = errno;
        ALOGE("ashmem_create_region failed: %s", strerror(error));
    } else {
        if (length > 0) {
            void* ptr = mmap(NULL, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
            if (ptr == MAP_FAILED) {
                error = errno;
                ALOGE("mmap failed: %s", strerror(error));
            } else {
                memcpy(ptr, data, length);
                munmap(ptr, length);
            }
        }

        if (!error) {
            if (ashmem_set_prot_region(fd, PROT_READ) < 0) {
                error = errno;
                ALOGE("ashmem_set_prot_region failed: %s", strerror(errno));
            } else {
                return fd;
            }
        }

        close(fd);
    }

#endif
    jniThrowIOException(env, -1);
    return -1;
}

static jint nativeExecuteForBlobFileDescriptor(JNIEnv* env, jclass clazz,
        jlong connectionPtr, jlong statementPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    sqlite3_stmt* statement = reinterpret_cast<sqlite3_stmt*>(statementPtr);

    int err = executeOneRowQuery(env, connection, statement);
    if (err == SQLITE_ROW && sqlite3_column_count(statement) >= 1) {
        const void* blob = sqlite3_column_blob(statement, 0);
        if (blob) {
            int length = sqlite3_column_bytes(statement, 0);
            if (length >= 0) {
                return createAshmemRegionWithData(env, blob, length);
            }
        }
    }
    return -1;
}

/*
** Note: The following symbols must be in the same order as the corresponding
** elements in the aMethod[] array in function nativeExecuteForCursorWindow().
*/
enum CWMethodNames {
  CW_CLEAR         = 0,
  CW_SETNUMCOLUMNS = 1,
  CW_ALLOCROW      = 2,
  CW_FREELASTROW   = 3,
  CW_PUTNULL       = 4,
  CW_PUTLONG       = 5,
  CW_PUTDOUBLE     = 6,
  CW_PUTSTRING     = 7,
  CW_PUTBLOB       = 8
};

/*
** An instance of this structure represents a single CursorWindow java method.
*/
struct CWMethod {
  jmethodID id;                   /* Method id */
  const char *zName;              /* Method name */
  const char *zSig;               /* Method JNI signature */
};

/*
** Append the contents of the row that SQL statement pStmt currently points to
** to the CursorWindow object passed as the second argument. The CursorWindow
** currently contains iRow rows. Return true on success or false if an error
** occurs.
*/
static jboolean copyRowToWindow(
  JNIEnv *pEnv,
  jobject win,
  int iRow,
  sqlite3_stmt *pStmt,
  CWMethod *aMethod
){
  int nCol = sqlite3_column_count(pStmt);
  int i;
  jboolean bOk;

  bOk = pEnv->CallBooleanMethod(win, aMethod[CW_ALLOCROW].id);
  for(i=0; bOk && i<nCol; i++){
    switch( sqlite3_column_type(pStmt, i) ){
      case SQLITE_NULL: {
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTNULL].id, iRow, i);
        break;
      }

      case SQLITE_INTEGER: {
        jlong val = sqlite3_column_int64(pStmt, i);
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTLONG].id, val, iRow, i);
        break;
      }

      case SQLITE_FLOAT: {
        jdouble val = sqlite3_column_double(pStmt, i);
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTDOUBLE].id, val, iRow, i);
        break;
      }

      case SQLITE_TEXT: {
        jchar *pStr = (jchar*)sqlite3_column_text16(pStmt, i);
        int nStr = sqlite3_column_bytes16(pStmt, i) / sizeof(jchar);
        jstring val = pEnv->NewString(pStr, nStr);
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTSTRING].id, val, iRow, i);
        pEnv->DeleteLocalRef(val);
        break;
      }

      default: {
        assert( sqlite3_column_type(pStmt, i)==SQLITE_BLOB );
        const jbyte *p = (const jbyte*)sqlite3_column_blob(pStmt, i);
        int n = sqlite3_column_bytes(pStmt, i);
        jbyteArray val = pEnv->NewByteArray(n);
        pEnv->SetByteArrayRegion(val, 0, n, p);
        bOk = pEnv->CallBooleanMethod(win, aMethod[CW_PUTBLOB].id, val, iRow, i);
        pEnv->DeleteLocalRef(val);
        break;
      }
    }

    if( bOk==0 ){
      pEnv->CallVoidMethod(win, aMethod[CW_FREELASTROW].id);
    }
  }

  return bOk;
}

static jboolean setWindowNumColumns(
  JNIEnv *pEnv,
  jobject win,
  sqlite3_stmt *pStmt,
  CWMethod *aMethod
){
  int nCol;

  pEnv->CallVoidMethod(win, aMethod[CW_CLEAR].id);
  nCol = sqlite3_column_count(pStmt);
  return pEnv->CallBooleanMethod(win, aMethod[CW_SETNUMCOLUMNS].id, (jint)nCol);
}

/*
** This method has been rewritten for org.sqlite.database.*. The original 
** android implementation used the C++ interface to populate a CursorWindow
** object. Since the NDK does not export this interface, we invoke the Java
** interface using standard JNI methods to do the same thing.
**
** This function executes the SQLite statement object passed as the 4th 
** argument and copies one or more returned rows into the CursorWindow
** object passed as the 5th argument. The set of rows copied into the 
** CursorWindow is always contiguous.
**
** The only row that *must* be copied into the CursorWindow is row 
** iRowRequired. Ideally, all rows from iRowStart through to the end
** of the query are copied into the CursorWindow. If this is not possible
** (CursorWindow objects have a finite capacity), some compromise position
** is found (see comments embedded in the code below for details).
**
** The return value is a 64-bit integer calculated as follows:
**
**      (iStart << 32) | nRow
**
** where iStart is the index of the first row copied into the CursorWindow.
** If the countAllRows argument is true, nRow is the total number of rows
** returned by the query. Otherwise, nRow is one greater than the index of 
** the last row copied into the CursorWindow.
*/
static jlong nativeExecuteForCursorWindow(
  JNIEnv *pEnv, 
  jclass clazz,
  jlong connectionPtr,            /* Pointer to SQLiteConnection C++ object */
  jlong statementPtr,             /* Pointer to sqlite3_stmt object */
  jobject win,                    /* The CursorWindow object to populate */
  jint startPos,                  /* First row to add (advisory) */
  jint iRowRequired,              /* Required row */
  jboolean countAllRows
) {
  SQLiteConnection *pConnection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
  sqlite3_stmt *pStmt = reinterpret_cast<sqlite3_stmt*>(statementPtr);

  CWMethod aMethod[] = {
    {0, "clear",         "()V"},
    {0, "setNumColumns", "(I)Z"},
    {0, "allocRow",      "()Z"},
    {0, "freeLastRow",   "()V"},
    {0, "putNull",       "(II)Z"},
    {0, "putLong",       "(JII)Z"},
    {0, "putDouble",     "(DII)Z"},
    {0, "putString",     "(Ljava/lang/String;II)Z"},
    {0, "putBlob",       "([BII)Z"},
  };
  jclass cls;                     /* Class android.database.CursorWindow */
  int i;                          /* Iterator variable */
  int nCol;                       /* Number of columns returned by pStmt */
  int nRow;
  jboolean bOk;
  int iStart;                     /* First row copied to CursorWindow */

  /* Locate all required CursorWindow methods. */
  cls = pEnv->FindClass("android/database/CursorWindow");
  for(i=0; i<(sizeof(aMethod)/sizeof(struct CWMethod)); i++){
    aMethod[i].id = pEnv->GetMethodID(cls, aMethod[i].zName, aMethod[i].zSig);
    if( aMethod[i].id==NULL ){
      jniThrowExceptionFmt(pEnv, "java/lang/Exception", 
          "Failed to find method CursorWindow.%s()", aMethod[i].zName
      );
      return 0;
    }
  }


  /* Set the number of columns in the window */
  bOk = setWindowNumColumns(pEnv, win, pStmt, aMethod);
  if( bOk==0 ) return 0;

  nRow = 0;
  iStart = startPos;
  while( sqlite3_step(pStmt)==SQLITE_ROW ){
    /* Only copy in rows that occur at or after row index iStart. */
    if( nRow>=iStart && bOk ){
      bOk = copyRowToWindow(pEnv, win, (nRow - iStart), pStmt, aMethod);
      if( bOk==0 ){
        /* The CursorWindow object ran out of memory. If row iRowRequired was
        ** not successfully added before this happened, clear the CursorWindow
        ** and try to add the current row again.  */
        if( nRow<=iRowRequired ){
          bOk = setWindowNumColumns(pEnv, win, pStmt, aMethod);
          if( bOk==0 ){
            sqlite3_reset(pStmt);
            return 0;
          }
          iStart = nRow;
          bOk = copyRowToWindow(pEnv, win, (nRow - iStart), pStmt, aMethod);
        }

        /* If the CursorWindow is still full and the countAllRows flag is not
        ** set, break out of the loop here. If countAllRows is set, continue
        ** so as to set variable nRow correctly.  */
        if( bOk==0 && countAllRows==0 ) break;
      }
    }

    nRow++;
  }

  /* Finalize the statement. If this indicates an error occurred, throw an
  ** SQLiteException exception.  */
  int rc = sqlite3_reset(pStmt);
  if( rc!=SQLITE_OK ){
    throw_sqlite3_exception(pEnv, sqlite3_db_handle(pStmt));
    return 0;
  }

  jlong lRet = jlong(iStart) << 32 | jlong(nRow);
  return lRet;
}

static jint nativeGetDbLookaside(JNIEnv* env, jobject clazz, jlong connectionPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);

    int cur = -1;
    int unused;
    sqlite3_db_status(connection->db, SQLITE_DBSTATUS_LOOKASIDE_USED, &cur, &unused, 0);
    return cur;
}

static void nativeCancel(JNIEnv* env, jobject clazz, jlong connectionPtr) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    connection->canceled = true;
}

static void nativeResetCancel(JNIEnv* env, jobject clazz, jlong connectionPtr,
        jboolean cancelable) {
    SQLiteConnection* connection = reinterpret_cast<SQLiteConnection*>(connectionPtr);
    connection->canceled = false;

    if (cancelable) {
        sqlite3_progress_handler(connection->db, 4, sqliteProgressHandlerCallback,
                connection);
    } else {
        sqlite3_progress_handler(connection->db, 0, NULL, NULL);
    }
}

static jboolean nativeHasCodec(JNIEnv* env, jobject clazz){
#ifdef SQLITE_HAS_CODEC
  return true;
#else
  return false;
#endif
}


static JNINativeMethod sMethods[] =
{
    /* name, signature, funcPtr */
    { "nativeOpen", "(Ljava/lang/String;ILjava/lang/String;ZZ)J",
            (void*)nativeOpen },
    { "nativeClose", "(J)V",
            (void*)nativeClose },
    { "nativeRegisterCustomFunction", "(JLorg/sqlite/database/sqlite/SQLiteCustomFunction;)V",
            (void*)nativeRegisterCustomFunction },
    { "nativeRegisterLocalizedCollators", "(JLjava/lang/String;)V",
            (void*)nativeRegisterLocalizedCollators },
    { "nativePrepareStatement", "(JLjava/lang/String;)J",
            (void*)nativePrepareStatement },
    { "nativeFinalizeStatement", "(JJ)V",
            (void*)nativeFinalizeStatement },
    { "nativeGetParameterCount", "(JJ)I",
            (void*)nativeGetParameterCount },
    { "nativeIsReadOnly", "(JJ)Z",
            (void*)nativeIsReadOnly },
    { "nativeGetColumnCount", "(JJ)I",
            (void*)nativeGetColumnCount },
    { "nativeGetColumnName", "(JJI)Ljava/lang/String;",
            (void*)nativeGetColumnName },
    { "nativeBindNull", "(JJI)V",
            (void*)nativeBindNull },
    { "nativeBindLong", "(JJIJ)V",
            (void*)nativeBindLong },
    { "nativeBindDouble", "(JJID)V",
            (void*)nativeBindDouble },
    { "nativeBindString", "(JJILjava/lang/String;)V",
            (void*)nativeBindString },
    { "nativeBindBlob", "(JJI[B)V",
            (void*)nativeBindBlob },
    { "nativeResetStatementAndClearBindings", "(JJ)V",
            (void*)nativeResetStatementAndClearBindings },
    { "nativeExecute", "(JJ)V",
            (void*)nativeExecute },
    { "nativeExecuteForLong", "(JJ)J",
            (void*)nativeExecuteForLong },
    { "nativeExecuteForString", "(JJ)Ljava/lang/String;",
            (void*)nativeExecuteForString },
    { "nativeExecuteForBlobFileDescriptor", "(JJ)I",
            (void*)nativeExecuteForBlobFileDescriptor },
    { "nativeExecuteForChangedRowCount", "(JJ)I",
            (void*)nativeExecuteForChangedRowCount },
    { "nativeExecuteForLastInsertedRowId", "(JJ)J",
            (void*)nativeExecuteForLastInsertedRowId },
    { "nativeExecuteForCursorWindow", "(JJLandroid/database/CursorWindow;IIZ)J",
            (void*)nativeExecuteForCursorWindow },
    { "nativeGetDbLookaside", "(J)I",
            (void*)nativeGetDbLookaside },
    { "nativeCancel", "(J)V",
            (void*)nativeCancel },
    { "nativeResetCancel", "(JZ)V",
            (void*)nativeResetCancel },

    { "nativeHasCodec", "()Z", (void*)nativeHasCodec },
};

#define FIND_CLASS(var, className) \
        var = env->FindClass(className); \
        LOG_FATAL_IF(! var, "Unable to find class " className);

#define GET_METHOD_ID(var, clazz, methodName, fieldDescriptor) \
        var = env->GetMethodID(clazz, methodName, fieldDescriptor); \
        LOG_FATAL_IF(! var, "Unable to find method" methodName);

#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
        LOG_FATAL_IF(! var, "Unable to find field " fieldName);

int register_android_database_SQLiteConnection(JNIEnv *env)
{
    jclass clazz;
    FIND_CLASS(clazz, "org/sqlite/database/sqlite/SQLiteCustomFunction");

    GET_FIELD_ID(gSQLiteCustomFunctionClassInfo.name, clazz,
            "name", "Ljava/lang/String;");
    GET_FIELD_ID(gSQLiteCustomFunctionClassInfo.numArgs, clazz,
            "numArgs", "I");
    GET_METHOD_ID(gSQLiteCustomFunctionClassInfo.dispatchCallback,
            clazz, "dispatchCallback", "([Ljava/lang/String;)V");

    FIND_CLASS(clazz, "java/lang/String");
    gStringClassInfo.clazz = jclass(env->NewGlobalRef(clazz));

    return jniRegisterNativeMethods(env, 
        "org/sqlite/database/sqlite/SQLiteConnection",
        sMethods, NELEM(sMethods)
    );
}

extern int register_android_database_SQLiteGlobal(JNIEnv *env);
extern int register_android_database_SQLiteDebug(JNIEnv *env);

} // namespace android

extern "C" JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved) {
  JNIEnv *env = 0;

  android::gpJavaVM = vm;
  vm->GetEnv((void**)&env, JNI_VERSION_1_4);

  android::register_android_database_SQLiteConnection(env);
  android::register_android_database_SQLiteDebug(env);
  android::register_android_database_SQLiteGlobal(env);

  return JNI_VERSION_1_4;
}









Added sqlite3/src/main/jni/sqlite/android_database_SQLiteDebug.cpp.


































































































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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

#define LOG_TAG "SQLiteDebug"

#include <jni.h>
#include <JNIHelp.h>
#include <ALog-priv.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <sqlite3.h>

namespace android {

static struct {
    jfieldID memoryUsed;
    jfieldID pageCacheOverflow;
    jfieldID largestMemAlloc;
} gSQLiteDebugPagerStatsClassInfo;

static void nativeGetPagerStats(JNIEnv *env, jobject clazz, jobject statsObj)
{
    int memoryUsed;
    int pageCacheOverflow;
    int largestMemAlloc;
    int unused;

    sqlite3_status(SQLITE_STATUS_MEMORY_USED, &memoryUsed, &unused, 0);
    sqlite3_status(SQLITE_STATUS_MALLOC_SIZE, &unused, &largestMemAlloc, 0);
    sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &pageCacheOverflow, &unused, 0);
    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.memoryUsed, memoryUsed);
    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow,
            pageCacheOverflow);
    env->SetIntField(statsObj, gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, largestMemAlloc);
}

/*
 * JNI registration.
 */

static JNINativeMethod gMethods[] =
{
    { "nativeGetPagerStats", "(Lorg/sqlite/database/sqlite/SQLiteDebug$PagerStats;)V",
            (void*) nativeGetPagerStats },
};

#define FIND_CLASS(var, className) \
        var = env->FindClass(className); \
        LOG_FATAL_IF(! var, "Unable to find class " className);

#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
        var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
        LOG_FATAL_IF(! var, "Unable to find field " fieldName);

int register_android_database_SQLiteDebug(JNIEnv *env)
{
    jclass clazz;
    FIND_CLASS(clazz, "org/sqlite/database/sqlite/SQLiteDebug$PagerStats");

    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.memoryUsed, clazz,
            "memoryUsed", "I");
    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.largestMemAlloc, clazz,
            "largestMemAlloc", "I");
    GET_FIELD_ID(gSQLiteDebugPagerStatsClassInfo.pageCacheOverflow, clazz,
            "pageCacheOverflow", "I");

    return jniRegisterNativeMethods(env, "org/sqlite/database/sqlite/SQLiteDebug",
            gMethods, NELEM(gMethods));
}

} // namespace android






Added sqlite3/src/main/jni/sqlite/android_database_SQLiteGlobal.cpp.









































































































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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
** Modified to support SQLite extensions by the SQLite developers: 
** sqlite-dev@sqlite.org.
*/

#define LOG_TAG "SQLiteGlobal"

#include <jni.h>
#include <JNIHelp.h>
#include "ALog-priv.h"


#include <sqlite3.h>
#if 0
#include <sqlite3_android.h>
#endif


#include "android_database_SQLiteCommon.h"

namespace android {

// Limit heap to 8MB for now.  This is 4 times the maximum cursor window
// size, as has been used by the original code in SQLiteDatabase for
// a long time.
static const int SOFT_HEAP_LIMIT = 8 * 1024 * 1024;


// Called each time a message is logged.
static void sqliteLogCallback(void* data, int iErrCode, const char* zMsg) {
    bool verboseLog = !!data;
    if (iErrCode == 0 || iErrCode == SQLITE_CONSTRAINT || iErrCode == SQLITE_SCHEMA) {
        if (verboseLog) {
            ALOG(LOG_VERBOSE, SQLITE_LOG_TAG, "(%d) %s\n", iErrCode, zMsg);
        }
    } else {
        ALOG(LOG_ERROR, SQLITE_LOG_TAG, "(%d) %s\n", iErrCode, zMsg);
    }
}

// Sets the global SQLite configuration.
// This must be called before any other SQLite functions are called.
static void sqliteInitialize() {
    // Enable multi-threaded mode.  In this mode, SQLite is safe to use by multiple
    // threads as long as no two threads use the same database connection at the same
    // time (which we guarantee in the SQLite database wrappers).
    sqlite3_config(SQLITE_CONFIG_MULTITHREAD);

    // Redirect SQLite log messages to the Android log.
#if 0
    bool verboseLog = android_util_Log_isVerboseLogEnabled(SQLITE_LOG_TAG);
#endif
    bool verboseLog = false;
    sqlite3_config(SQLITE_CONFIG_LOG, &sqliteLogCallback, verboseLog ? (void*)1 : NULL);

    // The soft heap limit prevents the page cache allocations from growing
    // beyond the given limit, no matter what the max page cache sizes are
    // set to. The limit does not, as of 3.5.0, affect any other allocations.
    sqlite3_soft_heap_limit(SOFT_HEAP_LIMIT);

    // Initialize SQLite.
    sqlite3_initialize();
}

static jint nativeReleaseMemory(JNIEnv* env, jclass clazz) {
    return sqlite3_release_memory(SOFT_HEAP_LIMIT);
}

static JNINativeMethod sMethods[] =
{
    /* name, signature, funcPtr */
    { "nativeReleaseMemory", "()I",
            (void*)nativeReleaseMemory },
};

int register_android_database_SQLiteGlobal(JNIEnv *env)
{
    sqliteInitialize();

    return jniRegisterNativeMethods(env, "org/sqlite/database/sqlite/SQLiteGlobal",
            sMethods, NELEM(sMethods));
}

} // namespace android






Added sqlite3/src/main/jni/sqlite/nativehelper/JNIHelp.h.





































































































































































































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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * JNI helper functions.
 *
 * This file may be included by C or C++ code, which is trouble because jni.h
 * uses different typedefs for JNIEnv in each language.
 *
 * TODO: remove C support.
 */
#ifndef NATIVEHELPER_JNIHELP_H_
#define NATIVEHELPER_JNIHELP_H_

#include "jni.h"
#include <unistd.h>

#ifndef NELEM
# define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Register one or more native methods with a particular class.
 * "className" looks like "java/lang/String". Aborts on failure.
 * TODO: fix all callers and change the return type to void.
 */
int jniRegisterNativeMethods(C_JNIEnv* env, const char* className, const JNINativeMethod* gMethods, int numMethods);

/*
 * Throw an exception with the specified class and an optional message.
 *
 * The "className" argument will be passed directly to FindClass, which
 * takes strings with slashes (e.g. "java/lang/Object").
 *
 * If an exception is currently pending, we log a warning message and
 * clear it.
 *
 * Returns 0 on success, nonzero if something failed (e.g. the exception
 * class couldn't be found, so *an* exception will still be pending).
 *
 * Currently aborts the VM if it can't throw the exception.
 */
int jniThrowException(C_JNIEnv* env, const char* className, const char* msg);

/*
 * Throw a java.lang.NullPointerException, with an optional message.
 */
int jniThrowNullPointerException(C_JNIEnv* env, const char* msg);

/*
 * Throw a java.lang.RuntimeException, with an optional message.
 */
int jniThrowRuntimeException(C_JNIEnv* env, const char* msg);

/*
 * Throw a java.io.IOException, generating the message from errno.
 */
int jniThrowIOException(C_JNIEnv* env, int errnum);

/*
 * Return a pointer to a locale-dependent error string explaining errno
 * value 'errnum'. The returned pointer may or may not be equal to 'buf'.
 * This function is thread-safe (unlike strerror) and portable (unlike
 * strerror_r).
 */
const char* jniStrError(int errnum, char* buf, size_t buflen);

/*
 * Returns a new java.io.FileDescriptor for the given int fd.
 */
jobject jniCreateFileDescriptor(C_JNIEnv* env, int fd);

/*
 * Returns the int fd from a java.io.FileDescriptor.
 */
int jniGetFDFromFileDescriptor(C_JNIEnv* env, jobject fileDescriptor);

/*
 * Sets the int fd in a java.io.FileDescriptor.
 */
void jniSetFileDescriptorOfFD(C_JNIEnv* env, jobject fileDescriptor, int value);

/*
 * Returns the reference from a java.lang.ref.Reference.
 */
jobject jniGetReferent(C_JNIEnv* env, jobject ref);

/*
 * Log a message and an exception.
 * If exception is NULL, logs the current exception in the JNI environment.
 */
void jniLogException(C_JNIEnv* env, int priority, const char* tag, jthrowable exception);

#ifdef __cplusplus
}
#endif


/*
 * For C++ code, we provide inlines that map to the C functions.  g++ always
 * inlines these, even on non-optimized builds.
 */
#if defined(__cplusplus)
inline int jniRegisterNativeMethods(JNIEnv* env, const char* className, const JNINativeMethod* gMethods, int numMethods) {
    return jniRegisterNativeMethods(&env->functions, className, gMethods, numMethods);
}

inline int jniThrowException(JNIEnv* env, const char* className, const char* msg) {
    return jniThrowException(&env->functions, className, msg);
}

extern "C" int jniThrowExceptionFmt(C_JNIEnv* env, const char* className, const char* fmt, va_list args);

/*
 * Equivalent to jniThrowException but with a printf-like format string and
 * variable-length argument list. This is only available in C++.
 */
inline int jniThrowExceptionFmt(JNIEnv* env, const char* className, const char* fmt, ...) {
    va_list args;
    va_start(args, fmt);
    return jniThrowExceptionFmt(&env->functions, className, fmt, args);
    va_end(args);
}

inline int jniThrowNullPointerException(JNIEnv* env, const char* msg) {
    return jniThrowNullPointerException(&env->functions, msg);
}

inline int jniThrowRuntimeException(JNIEnv* env, const char* msg) {
    return jniThrowRuntimeException(&env->functions, msg);
}

inline int jniThrowIOException(JNIEnv* env, int errnum) {
    return jniThrowIOException(&env->functions, errnum);
}

inline jobject jniCreateFileDescriptor(JNIEnv* env, int fd) {
    return jniCreateFileDescriptor(&env->functions, fd);
}

inline int jniGetFDFromFileDescriptor(JNIEnv* env, jobject fileDescriptor) {
    return jniGetFDFromFileDescriptor(&env->functions, fileDescriptor);
}

inline void jniSetFileDescriptorOfFD(JNIEnv* env, jobject fileDescriptor, int value) {
    jniSetFileDescriptorOfFD(&env->functions, fileDescriptor, value);
}

inline jobject jniGetReferent(JNIEnv* env, jobject ref) {
    return jniGetReferent(&env->functions, ref);
}

inline void jniLogException(JNIEnv* env, int priority, const char* tag, jthrowable exception = NULL) {
    jniLogException(&env->functions, priority, tag, exception);
}

#endif

/*
 * TEMP_FAILURE_RETRY is defined by some, but not all, versions of
 * <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's
 * not already defined, then define it here.
 */
#ifndef TEMP_FAILURE_RETRY
/* Used to retry syscalls that can return EINTR. */
#define TEMP_FAILURE_RETRY(exp) ({         \
    typeof (exp) _rc;                      \
    do {                                   \
        _rc = (exp);                       \
    } while (_rc == -1 && errno == EINTR); \
    _rc; })
#endif

#endif  /* NATIVEHELPER_JNIHELP_H_ */






Added sqlite3/src/main/jni/sqlite/nativehelper/JniConstants.h.









































































































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef JNI_CONSTANTS_H_included
#define JNI_CONSTANTS_H_included

#include "JNIHelp.h"

/**
 * A cache to avoid calling FindClass at runtime.
 *
 * Class lookup is relatively expensive (2.5us on passion-eng at the time of writing), so we do
 * all such lookups eagerly at startup. This means that code that never uses, say,
 * java.util.zip.Deflater still has to pay for the lookup, but it means that on a device the cost
 * is definitely paid during boot and amortized. A central cache also removes the temptation to
 * dynamically call FindClass rather than add a small cache to each file that needs one. Another
 * cost is that each class cached here requires a global reference, though in practice we save
 * enough by not having a global reference for each file that uses a class such as java.lang.String
 * which is used in several files.
 *
 * FindClass is still called in a couple of situations: when throwing exceptions, and in some of
 * the serialization code. The former is clearly not a performance case, and we're currently
 * assuming that neither is the latter.
 *
 * TODO: similar arguments hold for field and method IDs; we should cache them centrally too.
 */
struct JniConstants {
    static void init(JNIEnv* env);

    static jclass bidiRunClass;
    static jclass bigDecimalClass;
    static jclass booleanClass;
    static jclass byteArrayClass;
    static jclass byteClass;
    static jclass calendarClass;
    static jclass characterClass;
    static jclass charsetICUClass;
    static jclass constructorClass;
    static jclass deflaterClass;
    static jclass doubleClass;
    static jclass errnoExceptionClass;
    static jclass fieldClass;
    static jclass fieldPositionIteratorClass;
    static jclass fileDescriptorClass;
    static jclass floatClass;
    static jclass gaiExceptionClass;
    static jclass inet6AddressClass;
    static jclass inetAddressClass;
    static jclass inetSocketAddressClass;
    static jclass inetUnixAddressClass;
    static jclass inflaterClass;
    static jclass inputStreamClass;
    static jclass integerClass;
    static jclass localeDataClass;
    static jclass longClass;
    static jclass methodClass;
    static jclass mutableIntClass;
    static jclass mutableLongClass;
    static jclass objectClass;
    static jclass objectArrayClass;
    static jclass outputStreamClass;
    static jclass parsePositionClass;
    static jclass patternSyntaxExceptionClass;
    static jclass realToStringClass;
    static jclass referenceClass;
    static jclass shortClass;
    static jclass socketClass;
    static jclass socketImplClass;
    static jclass stringClass;
    static jclass structAddrinfoClass;
    static jclass structFlockClass;
    static jclass structGroupReqClass;
    static jclass structLingerClass;
    static jclass structPasswdClass;
    static jclass structPollfdClass;
    static jclass structStatClass;
    static jclass structStatVfsClass;
    static jclass structTimevalClass;
    static jclass structUcredClass;
    static jclass structUtsnameClass;
};

#define NATIVE_METHOD(className, functionName, signature) \
    { #functionName, signature, reinterpret_cast<void*>(className ## _ ## functionName) }

#endif  // JNI_CONSTANTS_H_included






Added sqlite3/src/main/jni/sqlite/nativehelper/ScopedLocalRef.h.





































































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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef SCOPED_LOCAL_REF_H_included
#define SCOPED_LOCAL_REF_H_included

#include "jni.h"

#include <stddef.h>

// A smart pointer that deletes a JNI local reference when it goes out of scope.
template<typename T>
class ScopedLocalRef {
public:
    ScopedLocalRef(JNIEnv* env, T localRef) : mEnv(env), mLocalRef(localRef) {
    }

    ~ScopedLocalRef() {
        reset();
    }

    void reset(T ptr = NULL) {
        if (ptr != mLocalRef) {
            if (mLocalRef != NULL) {
                mEnv->DeleteLocalRef(mLocalRef);
            }
            mLocalRef = ptr;
        }
    }

    T release() __attribute__((warn_unused_result)) {
        T localRef = mLocalRef;
        mLocalRef = NULL;
        return localRef;
    }

    T get() const {
        return mLocalRef;
    }

private:
    JNIEnv* mEnv;
    T mLocalRef;

    // Disallow copy and assignment.
    ScopedLocalRef(const ScopedLocalRef&);
    void operator=(const ScopedLocalRef&);
};

#endif  // SCOPED_LOCAL_REF_H_included






Added sqlite3/src/main/jni/sqlite/nativehelper/jni.h.



























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * JNI specification, as defined by Sun:
 * http://java.sun.com/javase/6/docs/technotes/guides/jni/spec/jniTOC.html
 *
 * Everything here is expected to be VM-neutral.
 */

#ifndef JNI_H_
#define JNI_H_

#include <stdarg.h>
#include <stdint.h>

/* Primitive types that match up with Java equivalents. */
typedef uint8_t  jboolean; /* unsigned 8 bits */
typedef int8_t   jbyte;    /* signed 8 bits */
typedef uint16_t jchar;    /* unsigned 16 bits */
typedef int16_t  jshort;   /* signed 16 bits */
typedef int32_t  jint;     /* signed 32 bits */
typedef int64_t  jlong;    /* signed 64 bits */
typedef float    jfloat;   /* 32-bit IEEE 754 */
typedef double   jdouble;  /* 64-bit IEEE 754 */

/* "cardinal indices and sizes" */
typedef jint     jsize;

#ifdef __cplusplus
/*
 * Reference types, in C++
 */
class _jobject {};
class _jclass : public _jobject {};
class _jstring : public _jobject {};
class _jarray : public _jobject {};
class _jobjectArray : public _jarray {};
class _jbooleanArray : public _jarray {};
class _jbyteArray : public _jarray {};
class _jcharArray : public _jarray {};
class _jshortArray : public _jarray {};
class _jintArray : public _jarray {};
class _jlongArray : public _jarray {};
class _jfloatArray : public _jarray {};
class _jdoubleArray : public _jarray {};
class _jthrowable : public _jobject {};

typedef _jobject*       jobject;
typedef _jclass*        jclass;
typedef _jstring*       jstring;
typedef _jarray*        jarray;
typedef _jobjectArray*  jobjectArray;
typedef _jbooleanArray* jbooleanArray;
typedef _jbyteArray*    jbyteArray;
typedef _jcharArray*    jcharArray;
typedef _jshortArray*   jshortArray;
typedef _jintArray*     jintArray;
typedef _jlongArray*    jlongArray;
typedef _jfloatArray*   jfloatArray;
typedef _jdoubleArray*  jdoubleArray;
typedef _jthrowable*    jthrowable;
typedef _jobject*       jweak;


#else /* not __cplusplus */

/*
 * Reference types, in C.
 */
typedef void*           jobject;
typedef jobject         jclass;
typedef jobject         jstring;
typedef jobject         jarray;
typedef jarray          jobjectArray;
typedef jarray          jbooleanArray;
typedef jarray          jbyteArray;
typedef jarray          jcharArray;
typedef jarray          jshortArray;
typedef jarray          jintArray;
typedef jarray          jlongArray;
typedef jarray          jfloatArray;
typedef jarray          jdoubleArray;
typedef jobject         jthrowable;
typedef jobject         jweak;

#endif /* not __cplusplus */

struct _jfieldID;                       /* opaque structure */
typedef struct _jfieldID* jfieldID;     /* field IDs */

struct _jmethodID;                      /* opaque structure */
typedef struct _jmethodID* jmethodID;   /* method IDs */

struct JNIInvokeInterface;

typedef union jvalue {
    jboolean    z;
    jbyte       b;
    jchar       c;
    jshort      s;
    jint        i;
    jlong       j;
    jfloat      f;
    jdouble     d;
    jobject     l;
} jvalue;

typedef enum jobjectRefType {
    JNIInvalidRefType = 0,
    JNILocalRefType = 1,
    JNIGlobalRefType = 2,
    JNIWeakGlobalRefType = 3
} jobjectRefType;

typedef struct {
    const char* name;
    const char* signature;
    void*       fnPtr;
} JNINativeMethod;

struct _JNIEnv;
struct _JavaVM;
typedef const struct JNINativeInterface* C_JNIEnv;

#if defined(__cplusplus)
typedef _JNIEnv JNIEnv;
typedef _JavaVM JavaVM;
#else
typedef const struct JNINativeInterface* JNIEnv;
typedef const struct JNIInvokeInterface* JavaVM;
#endif

/*
 * Table of interface function pointers.
 */
struct JNINativeInterface {
    void*       reserved0;
    void*       reserved1;
    void*       reserved2;
    void*       reserved3;

    jint        (*GetVersion)(JNIEnv *);

    jclass      (*DefineClass)(JNIEnv*, const char*, jobject, const jbyte*,
                        jsize);
    jclass      (*FindClass)(JNIEnv*, const char*);

    jmethodID   (*FromReflectedMethod)(JNIEnv*, jobject);
    jfieldID    (*FromReflectedField)(JNIEnv*, jobject);
    /* spec doesn't show jboolean parameter */
    jobject     (*ToReflectedMethod)(JNIEnv*, jclass, jmethodID, jboolean);

    jclass      (*GetSuperclass)(JNIEnv*, jclass);
    jboolean    (*IsAssignableFrom)(JNIEnv*, jclass, jclass);

    /* spec doesn't show jboolean parameter */
    jobject     (*ToReflectedField)(JNIEnv*, jclass, jfieldID, jboolean);

    jint        (*Throw)(JNIEnv*, jthrowable);
    jint        (*ThrowNew)(JNIEnv *, jclass, const char *);
    jthrowable  (*ExceptionOccurred)(JNIEnv*);
    void        (*ExceptionDescribe)(JNIEnv*);
    void        (*ExceptionClear)(JNIEnv*);
    void        (*FatalError)(JNIEnv*, const char*);

    jint        (*PushLocalFrame)(JNIEnv*, jint);
    jobject     (*PopLocalFrame)(JNIEnv*, jobject);

    jobject     (*NewGlobalRef)(JNIEnv*, jobject);
    void        (*DeleteGlobalRef)(JNIEnv*, jobject);
    void        (*DeleteLocalRef)(JNIEnv*, jobject);
    jboolean    (*IsSameObject)(JNIEnv*, jobject, jobject);

    jobject     (*NewLocalRef)(JNIEnv*, jobject);
    jint        (*EnsureLocalCapacity)(JNIEnv*, jint);

    jobject     (*AllocObject)(JNIEnv*, jclass);
    jobject     (*NewObject)(JNIEnv*, jclass, jmethodID, ...);
    jobject     (*NewObjectV)(JNIEnv*, jclass, jmethodID, va_list);
    jobject     (*NewObjectA)(JNIEnv*, jclass, jmethodID, jvalue*);

    jclass      (*GetObjectClass)(JNIEnv*, jobject);
    jboolean    (*IsInstanceOf)(JNIEnv*, jobject, jclass);
    jmethodID   (*GetMethodID)(JNIEnv*, jclass, const char*, const char*);

    jobject     (*CallObjectMethod)(JNIEnv*, jobject, jmethodID, ...);
    jobject     (*CallObjectMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jobject     (*CallObjectMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jboolean    (*CallBooleanMethod)(JNIEnv*, jobject, jmethodID, ...);
    jboolean    (*CallBooleanMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jboolean    (*CallBooleanMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jbyte       (*CallByteMethod)(JNIEnv*, jobject, jmethodID, ...);
    jbyte       (*CallByteMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jbyte       (*CallByteMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jchar       (*CallCharMethod)(JNIEnv*, jobject, jmethodID, ...);
    jchar       (*CallCharMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jchar       (*CallCharMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jshort      (*CallShortMethod)(JNIEnv*, jobject, jmethodID, ...);
    jshort      (*CallShortMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jshort      (*CallShortMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jint        (*CallIntMethod)(JNIEnv*, jobject, jmethodID, ...);
    jint        (*CallIntMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jint        (*CallIntMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jlong       (*CallLongMethod)(JNIEnv*, jobject, jmethodID, ...);
    jlong       (*CallLongMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jlong       (*CallLongMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jfloat      (*CallFloatMethod)(JNIEnv*, jobject, jmethodID, ...);
    jfloat      (*CallFloatMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jfloat      (*CallFloatMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    jdouble     (*CallDoubleMethod)(JNIEnv*, jobject, jmethodID, ...);
    jdouble     (*CallDoubleMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    jdouble     (*CallDoubleMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);
    void        (*CallVoidMethod)(JNIEnv*, jobject, jmethodID, ...);
    void        (*CallVoidMethodV)(JNIEnv*, jobject, jmethodID, va_list);
    void        (*CallVoidMethodA)(JNIEnv*, jobject, jmethodID, jvalue*);

    jobject     (*CallNonvirtualObjectMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jobject     (*CallNonvirtualObjectMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jobject     (*CallNonvirtualObjectMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jboolean    (*CallNonvirtualBooleanMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jboolean    (*CallNonvirtualBooleanMethodV)(JNIEnv*, jobject, jclass,
                         jmethodID, va_list);
    jboolean    (*CallNonvirtualBooleanMethodA)(JNIEnv*, jobject, jclass,
                         jmethodID, jvalue*);
    jbyte       (*CallNonvirtualByteMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jbyte       (*CallNonvirtualByteMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jbyte       (*CallNonvirtualByteMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jchar       (*CallNonvirtualCharMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jchar       (*CallNonvirtualCharMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jchar       (*CallNonvirtualCharMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jshort      (*CallNonvirtualShortMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jshort      (*CallNonvirtualShortMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jshort      (*CallNonvirtualShortMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jint        (*CallNonvirtualIntMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jint        (*CallNonvirtualIntMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jint        (*CallNonvirtualIntMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jlong       (*CallNonvirtualLongMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jlong       (*CallNonvirtualLongMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jlong       (*CallNonvirtualLongMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jfloat      (*CallNonvirtualFloatMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jfloat      (*CallNonvirtualFloatMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jfloat      (*CallNonvirtualFloatMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    jdouble     (*CallNonvirtualDoubleMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    jdouble     (*CallNonvirtualDoubleMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    jdouble     (*CallNonvirtualDoubleMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);
    void        (*CallNonvirtualVoidMethod)(JNIEnv*, jobject, jclass,
                        jmethodID, ...);
    void        (*CallNonvirtualVoidMethodV)(JNIEnv*, jobject, jclass,
                        jmethodID, va_list);
    void        (*CallNonvirtualVoidMethodA)(JNIEnv*, jobject, jclass,
                        jmethodID, jvalue*);

    jfieldID    (*GetFieldID)(JNIEnv*, jclass, const char*, const char*);

    jobject     (*GetObjectField)(JNIEnv*, jobject, jfieldID);
    jboolean    (*GetBooleanField)(JNIEnv*, jobject, jfieldID);
    jbyte       (*GetByteField)(JNIEnv*, jobject, jfieldID);
    jchar       (*GetCharField)(JNIEnv*, jobject, jfieldID);
    jshort      (*GetShortField)(JNIEnv*, jobject, jfieldID);
    jint        (*GetIntField)(JNIEnv*, jobject, jfieldID);
    jlong       (*GetLongField)(JNIEnv*, jobject, jfieldID);
    jfloat      (*GetFloatField)(JNIEnv*, jobject, jfieldID);
    jdouble     (*GetDoubleField)(JNIEnv*, jobject, jfieldID);

    void        (*SetObjectField)(JNIEnv*, jobject, jfieldID, jobject);
    void        (*SetBooleanField)(JNIEnv*, jobject, jfieldID, jboolean);
    void        (*SetByteField)(JNIEnv*, jobject, jfieldID, jbyte);
    void        (*SetCharField)(JNIEnv*, jobject, jfieldID, jchar);
    void        (*SetShortField)(JNIEnv*, jobject, jfieldID, jshort);
    void        (*SetIntField)(JNIEnv*, jobject, jfieldID, jint);
    void        (*SetLongField)(JNIEnv*, jobject, jfieldID, jlong);
    void        (*SetFloatField)(JNIEnv*, jobject, jfieldID, jfloat);
    void        (*SetDoubleField)(JNIEnv*, jobject, jfieldID, jdouble);

    jmethodID   (*GetStaticMethodID)(JNIEnv*, jclass, const char*, const char*);

    jobject     (*CallStaticObjectMethod)(JNIEnv*, jclass, jmethodID, ...);
    jobject     (*CallStaticObjectMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jobject     (*CallStaticObjectMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jboolean    (*CallStaticBooleanMethod)(JNIEnv*, jclass, jmethodID, ...);
    jboolean    (*CallStaticBooleanMethodV)(JNIEnv*, jclass, jmethodID,
                        va_list);
    jboolean    (*CallStaticBooleanMethodA)(JNIEnv*, jclass, jmethodID,
                        jvalue*);
    jbyte       (*CallStaticByteMethod)(JNIEnv*, jclass, jmethodID, ...);
    jbyte       (*CallStaticByteMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jbyte       (*CallStaticByteMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jchar       (*CallStaticCharMethod)(JNIEnv*, jclass, jmethodID, ...);
    jchar       (*CallStaticCharMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jchar       (*CallStaticCharMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jshort      (*CallStaticShortMethod)(JNIEnv*, jclass, jmethodID, ...);
    jshort      (*CallStaticShortMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jshort      (*CallStaticShortMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jint        (*CallStaticIntMethod)(JNIEnv*, jclass, jmethodID, ...);
    jint        (*CallStaticIntMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jint        (*CallStaticIntMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jlong       (*CallStaticLongMethod)(JNIEnv*, jclass, jmethodID, ...);
    jlong       (*CallStaticLongMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jlong       (*CallStaticLongMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jfloat      (*CallStaticFloatMethod)(JNIEnv*, jclass, jmethodID, ...);
    jfloat      (*CallStaticFloatMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jfloat      (*CallStaticFloatMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    jdouble     (*CallStaticDoubleMethod)(JNIEnv*, jclass, jmethodID, ...);
    jdouble     (*CallStaticDoubleMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    jdouble     (*CallStaticDoubleMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);
    void        (*CallStaticVoidMethod)(JNIEnv*, jclass, jmethodID, ...);
    void        (*CallStaticVoidMethodV)(JNIEnv*, jclass, jmethodID, va_list);
    void        (*CallStaticVoidMethodA)(JNIEnv*, jclass, jmethodID, jvalue*);

    jfieldID    (*GetStaticFieldID)(JNIEnv*, jclass, const char*,
                        const char*);

    jobject     (*GetStaticObjectField)(JNIEnv*, jclass, jfieldID);
    jboolean    (*GetStaticBooleanField)(JNIEnv*, jclass, jfieldID);
    jbyte       (*GetStaticByteField)(JNIEnv*, jclass, jfieldID);
    jchar       (*GetStaticCharField)(JNIEnv*, jclass, jfieldID);
    jshort      (*GetStaticShortField)(JNIEnv*, jclass, jfieldID);
    jint        (*GetStaticIntField)(JNIEnv*, jclass, jfieldID);
    jlong       (*GetStaticLongField)(JNIEnv*, jclass, jfieldID);
    jfloat      (*GetStaticFloatField)(JNIEnv*, jclass, jfieldID);
    jdouble     (*GetStaticDoubleField)(JNIEnv*, jclass, jfieldID);

    void        (*SetStaticObjectField)(JNIEnv*, jclass, jfieldID, jobject);
    void        (*SetStaticBooleanField)(JNIEnv*, jclass, jfieldID, jboolean);
    void        (*SetStaticByteField)(JNIEnv*, jclass, jfieldID, jbyte);
    void        (*SetStaticCharField)(JNIEnv*, jclass, jfieldID, jchar);
    void        (*SetStaticShortField)(JNIEnv*, jclass, jfieldID, jshort);
    void        (*SetStaticIntField)(JNIEnv*, jclass, jfieldID, jint);
    void        (*SetStaticLongField)(JNIEnv*, jclass, jfieldID, jlong);
    void        (*SetStaticFloatField)(JNIEnv*, jclass, jfieldID, jfloat);
    void        (*SetStaticDoubleField)(JNIEnv*, jclass, jfieldID, jdouble);

    jstring     (*NewString)(JNIEnv*, const jchar*, jsize);
    jsize       (*GetStringLength)(JNIEnv*, jstring);
    const jchar* (*GetStringChars)(JNIEnv*, jstring, jboolean*);
    void        (*ReleaseStringChars)(JNIEnv*, jstring, const jchar*);
    jstring     (*NewStringUTF)(JNIEnv*, const char*);
    jsize       (*GetStringUTFLength)(JNIEnv*, jstring);
    /* JNI spec says this returns const jbyte*, but that's inconsistent */
    const char* (*GetStringUTFChars)(JNIEnv*, jstring, jboolean*);
    void        (*ReleaseStringUTFChars)(JNIEnv*, jstring, const char*);
    jsize       (*GetArrayLength)(JNIEnv*, jarray);
    jobjectArray (*NewObjectArray)(JNIEnv*, jsize, jclass, jobject);
    jobject     (*GetObjectArrayElement)(JNIEnv*, jobjectArray, jsize);
    void        (*SetObjectArrayElement)(JNIEnv*, jobjectArray, jsize, jobject);

    jbooleanArray (*NewBooleanArray)(JNIEnv*, jsize);
    jbyteArray    (*NewByteArray)(JNIEnv*, jsize);
    jcharArray    (*NewCharArray)(JNIEnv*, jsize);
    jshortArray   (*NewShortArray)(JNIEnv*, jsize);
    jintArray     (*NewIntArray)(JNIEnv*, jsize);
    jlongArray    (*NewLongArray)(JNIEnv*, jsize);
    jfloatArray   (*NewFloatArray)(JNIEnv*, jsize);
    jdoubleArray  (*NewDoubleArray)(JNIEnv*, jsize);

    jboolean*   (*GetBooleanArrayElements)(JNIEnv*, jbooleanArray, jboolean*);
    jbyte*      (*GetByteArrayElements)(JNIEnv*, jbyteArray, jboolean*);
    jchar*      (*GetCharArrayElements)(JNIEnv*, jcharArray, jboolean*);
    jshort*     (*GetShortArrayElements)(JNIEnv*, jshortArray, jboolean*);
    jint*       (*GetIntArrayElements)(JNIEnv*, jintArray, jboolean*);
    jlong*      (*GetLongArrayElements)(JNIEnv*, jlongArray, jboolean*);
    jfloat*     (*GetFloatArrayElements)(JNIEnv*, jfloatArray, jboolean*);
    jdouble*    (*GetDoubleArrayElements)(JNIEnv*, jdoubleArray, jboolean*);

    void        (*ReleaseBooleanArrayElements)(JNIEnv*, jbooleanArray,
                        jboolean*, jint);
    void        (*ReleaseByteArrayElements)(JNIEnv*, jbyteArray,
                        jbyte*, jint);
    void        (*ReleaseCharArrayElements)(JNIEnv*, jcharArray,
                        jchar*, jint);
    void        (*ReleaseShortArrayElements)(JNIEnv*, jshortArray,
                        jshort*, jint);
    void        (*ReleaseIntArrayElements)(JNIEnv*, jintArray,
                        jint*, jint);
    void        (*ReleaseLongArrayElements)(JNIEnv*, jlongArray,
                        jlong*, jint);
    void        (*ReleaseFloatArrayElements)(JNIEnv*, jfloatArray,
                        jfloat*, jint);
    void        (*ReleaseDoubleArrayElements)(JNIEnv*, jdoubleArray,
                        jdouble*, jint);

    void        (*GetBooleanArrayRegion)(JNIEnv*, jbooleanArray,
                        jsize, jsize, jboolean*);
    void        (*GetByteArrayRegion)(JNIEnv*, jbyteArray,
                        jsize, jsize, jbyte*);
    void        (*GetCharArrayRegion)(JNIEnv*, jcharArray,
                        jsize, jsize, jchar*);
    void        (*GetShortArrayRegion)(JNIEnv*, jshortArray,
                        jsize, jsize, jshort*);
    void        (*GetIntArrayRegion)(JNIEnv*, jintArray,
                        jsize, jsize, jint*);
    void        (*GetLongArrayRegion)(JNIEnv*, jlongArray,
                        jsize, jsize, jlong*);
    void        (*GetFloatArrayRegion)(JNIEnv*, jfloatArray,
                        jsize, jsize, jfloat*);
    void        (*GetDoubleArrayRegion)(JNIEnv*, jdoubleArray,
                        jsize, jsize, jdouble*);

    /* spec shows these without const; some jni.h do, some don't */
    void        (*SetBooleanArrayRegion)(JNIEnv*, jbooleanArray,
                        jsize, jsize, const jboolean*);
    void        (*SetByteArrayRegion)(JNIEnv*, jbyteArray,
                        jsize, jsize, const jbyte*);
    void        (*SetCharArrayRegion)(JNIEnv*, jcharArray,
                        jsize, jsize, const jchar*);
    void        (*SetShortArrayRegion)(JNIEnv*, jshortArray,
                        jsize, jsize, const jshort*);
    void        (*SetIntArrayRegion)(JNIEnv*, jintArray,
                        jsize, jsize, const jint*);
    void        (*SetLongArrayRegion)(JNIEnv*, jlongArray,
                        jsize, jsize, const jlong*);
    void        (*SetFloatArrayRegion)(JNIEnv*, jfloatArray,
                        jsize, jsize, const jfloat*);
    void        (*SetDoubleArrayRegion)(JNIEnv*, jdoubleArray,
                        jsize, jsize, const jdouble*);

    jint        (*RegisterNatives)(JNIEnv*, jclass, const JNINativeMethod*,
                        jint);
    jint        (*UnregisterNatives)(JNIEnv*, jclass);
    jint        (*MonitorEnter)(JNIEnv*, jobject);
    jint        (*MonitorExit)(JNIEnv*, jobject);
    jint        (*GetJavaVM)(JNIEnv*, JavaVM**);

    void        (*GetStringRegion)(JNIEnv*, jstring, jsize, jsize, jchar*);
    void        (*GetStringUTFRegion)(JNIEnv*, jstring, jsize, jsize, char*);

    void*       (*GetPrimitiveArrayCritical)(JNIEnv*, jarray, jboolean*);
    void        (*ReleasePrimitiveArrayCritical)(JNIEnv*, jarray, void*, jint);

    const jchar* (*GetStringCritical)(JNIEnv*, jstring, jboolean*);
    void        (*ReleaseStringCritical)(JNIEnv*, jstring, const jchar*);

    jweak       (*NewWeakGlobalRef)(JNIEnv*, jobject);
    void        (*DeleteWeakGlobalRef)(JNIEnv*, jweak);

    jboolean    (*ExceptionCheck)(JNIEnv*);

    jobject     (*NewDirectByteBuffer)(JNIEnv*, void*, jlong);
    void*       (*GetDirectBufferAddress)(JNIEnv*, jobject);
    jlong       (*GetDirectBufferCapacity)(JNIEnv*, jobject);

    /* added in JNI 1.6 */
    jobjectRefType (*GetObjectRefType)(JNIEnv*, jobject);
};

/*
 * C++ object wrapper.
 *
 * This is usually overlaid on a C struct whose first element is a
 * JNINativeInterface*.  We rely somewhat on compiler behavior.
 */
struct _JNIEnv {
    /* do not rename this; it does not seem to be entirely opaque */
    const struct JNINativeInterface* functions;

#if defined(__cplusplus)

    jint GetVersion()
    { return functions->GetVersion(this); }

    jclass DefineClass(const char *name, jobject loader, const jbyte* buf,
        jsize bufLen)
    { return functions->DefineClass(this, name, loader, buf, bufLen); }

    jclass FindClass(const char* name)
    { return functions->FindClass(this, name); }

    jmethodID FromReflectedMethod(jobject method)
    { return functions->FromReflectedMethod(this, method); }

    jfieldID FromReflectedField(jobject field)
    { return functions->FromReflectedField(this, field); }

    jobject ToReflectedMethod(jclass cls, jmethodID methodID, jboolean isStatic)
    { return functions->ToReflectedMethod(this, cls, methodID, isStatic); }

    jclass GetSuperclass(jclass clazz)
    { return functions->GetSuperclass(this, clazz); }

    jboolean IsAssignableFrom(jclass clazz1, jclass clazz2)
    { return functions->IsAssignableFrom(this, clazz1, clazz2); }

    jobject ToReflectedField(jclass cls, jfieldID fieldID, jboolean isStatic)
    { return functions->ToReflectedField(this, cls, fieldID, isStatic); }

    jint Throw(jthrowable obj)
    { return functions->Throw(this, obj); }

    jint ThrowNew(jclass clazz, const char* message)
    { return functions->ThrowNew(this, clazz, message); }

    jthrowable ExceptionOccurred()
    { return functions->ExceptionOccurred(this); }

    void ExceptionDescribe()
    { functions->ExceptionDescribe(this); }

    void ExceptionClear()
    { functions->ExceptionClear(this); }

    void FatalError(const char* msg)
    { functions->FatalError(this, msg); }

    jint PushLocalFrame(jint capacity)
    { return functions->PushLocalFrame(this, capacity); }

    jobject PopLocalFrame(jobject result)
    { return functions->PopLocalFrame(this, result); }

    jobject NewGlobalRef(jobject obj)
    { return functions->NewGlobalRef(this, obj); }

    void DeleteGlobalRef(jobject globalRef)
    { functions->DeleteGlobalRef(this, globalRef); }

    void DeleteLocalRef(jobject localRef)
    { functions->DeleteLocalRef(this, localRef); }

    jboolean IsSameObject(jobject ref1, jobject ref2)
    { return functions->IsSameObject(this, ref1, ref2); }

    jobject NewLocalRef(jobject ref)
    { return functions->NewLocalRef(this, ref); }

    jint EnsureLocalCapacity(jint capacity)
    { return functions->EnsureLocalCapacity(this, capacity); }

    jobject AllocObject(jclass clazz)
    { return functions->AllocObject(this, clazz); }

    jobject NewObject(jclass clazz, jmethodID methodID, ...)
    {
        va_list args;
        va_start(args, methodID);
        jobject result = functions->NewObjectV(this, clazz, methodID, args);
        va_end(args);
        return result;
    }

    jobject NewObjectV(jclass clazz, jmethodID methodID, va_list args)
    { return functions->NewObjectV(this, clazz, methodID, args); }

    jobject NewObjectA(jclass clazz, jmethodID methodID, jvalue* args)
    { return functions->NewObjectA(this, clazz, methodID, args); }

    jclass GetObjectClass(jobject obj)
    { return functions->GetObjectClass(this, obj); }

    jboolean IsInstanceOf(jobject obj, jclass clazz)
    { return functions->IsInstanceOf(this, obj, clazz); }

    jmethodID GetMethodID(jclass clazz, const char* name, const char* sig)
    { return functions->GetMethodID(this, clazz, name, sig); }

#define CALL_TYPE_METHOD(_jtype, _jname)                                    \
    _jtype Call##_jname##Method(jobject obj, jmethodID methodID, ...)       \
    {                                                                       \
        _jtype result;                                                      \
        va_list args;                                                       \
        va_start(args, methodID);                                           \
        result = functions->Call##_jname##MethodV(this, obj, methodID,      \
                    args);                                                  \
        va_end(args);                                                       \
        return result;                                                      \
    }
#define CALL_TYPE_METHODV(_jtype, _jname)                                   \
    _jtype Call##_jname##MethodV(jobject obj, jmethodID methodID,           \
        va_list args)                                                       \
    { return functions->Call##_jname##MethodV(this, obj, methodID, args); }
#define CALL_TYPE_METHODA(_jtype, _jname)                                   \
    _jtype Call##_jname##MethodA(jobject obj, jmethodID methodID,           \
        jvalue* args)                                                       \
    { return functions->Call##_jname##MethodA(this, obj, methodID, args); }

#define CALL_TYPE(_jtype, _jname)                                           \
    CALL_TYPE_METHOD(_jtype, _jname)                                        \
    CALL_TYPE_METHODV(_jtype, _jname)                                       \
    CALL_TYPE_METHODA(_jtype, _jname)

    CALL_TYPE(jobject, Object)
    CALL_TYPE(jboolean, Boolean)
    CALL_TYPE(jbyte, Byte)
    CALL_TYPE(jchar, Char)
    CALL_TYPE(jshort, Short)
    CALL_TYPE(jint, Int)
    CALL_TYPE(jlong, Long)
    CALL_TYPE(jfloat, Float)
    CALL_TYPE(jdouble, Double)

    void CallVoidMethod(jobject obj, jmethodID methodID, ...)
    {
        va_list args;
        va_start(args, methodID);
        functions->CallVoidMethodV(this, obj, methodID, args);
        va_end(args);
    }
    void CallVoidMethodV(jobject obj, jmethodID methodID, va_list args)
    { functions->CallVoidMethodV(this, obj, methodID, args); }
    void CallVoidMethodA(jobject obj, jmethodID methodID, jvalue* args)
    { functions->CallVoidMethodA(this, obj, methodID, args); }

#define CALL_NONVIRT_TYPE_METHOD(_jtype, _jname)                            \
    _jtype CallNonvirtual##_jname##Method(jobject obj, jclass clazz,        \
        jmethodID methodID, ...)                                            \
    {                                                                       \
        _jtype result;                                                      \
        va_list args;                                                       \
        va_start(args, methodID);                                           \
        result = functions->CallNonvirtual##_jname##MethodV(this, obj,      \
                    clazz, methodID, args);                                 \
        va_end(args);                                                       \
        return result;                                                      \
    }
#define CALL_NONVIRT_TYPE_METHODV(_jtype, _jname)                           \
    _jtype CallNonvirtual##_jname##MethodV(jobject obj, jclass clazz,       \
        jmethodID methodID, va_list args)                                   \
    { return functions->CallNonvirtual##_jname##MethodV(this, obj, clazz,   \
        methodID, args); }
#define CALL_NONVIRT_TYPE_METHODA(_jtype, _jname)                           \
    _jtype CallNonvirtual##_jname##MethodA(jobject obj, jclass clazz,       \
        jmethodID methodID, jvalue* args)                                   \
    { return functions->CallNonvirtual##_jname##MethodA(this, obj, clazz,   \
        methodID, args); }

#define CALL_NONVIRT_TYPE(_jtype, _jname)                                   \
    CALL_NONVIRT_TYPE_METHOD(_jtype, _jname)                                \
    CALL_NONVIRT_TYPE_METHODV(_jtype, _jname)                               \
    CALL_NONVIRT_TYPE_METHODA(_jtype, _jname)

    CALL_NONVIRT_TYPE(jobject, Object)
    CALL_NONVIRT_TYPE(jboolean, Boolean)
    CALL_NONVIRT_TYPE(jbyte, Byte)
    CALL_NONVIRT_TYPE(jchar, Char)
    CALL_NONVIRT_TYPE(jshort, Short)
    CALL_NONVIRT_TYPE(jint, Int)
    CALL_NONVIRT_TYPE(jlong, Long)
    CALL_NONVIRT_TYPE(jfloat, Float)
    CALL_NONVIRT_TYPE(jdouble, Double)

    void CallNonvirtualVoidMethod(jobject obj, jclass clazz,
        jmethodID methodID, ...)
    {
        va_list args;
        va_start(args, methodID);
        functions->CallNonvirtualVoidMethodV(this, obj, clazz, methodID, args);
        va_end(args);
    }
    void CallNonvirtualVoidMethodV(jobject obj, jclass clazz,
        jmethodID methodID, va_list args)
    { functions->CallNonvirtualVoidMethodV(this, obj, clazz, methodID, args); }
    void CallNonvirtualVoidMethodA(jobject obj, jclass clazz,
        jmethodID methodID, jvalue* args)
    { functions->CallNonvirtualVoidMethodA(this, obj, clazz, methodID, args); }

    jfieldID GetFieldID(jclass clazz, const char* name, const char* sig)
    { return functions->GetFieldID(this, clazz, name, sig); }

    jobject GetObjectField(jobject obj, jfieldID fieldID)
    { return functions->GetObjectField(this, obj, fieldID); }
    jboolean GetBooleanField(jobject obj, jfieldID fieldID)
    { return functions->GetBooleanField(this, obj, fieldID); }
    jbyte GetByteField(jobject obj, jfieldID fieldID)
    { return functions->GetByteField(this, obj, fieldID); }
    jchar GetCharField(jobject obj, jfieldID fieldID)
    { return functions->GetCharField(this, obj, fieldID); }
    jshort GetShortField(jobject obj, jfieldID fieldID)
    { return functions->GetShortField(this, obj, fieldID); }
    jint GetIntField(jobject obj, jfieldID fieldID)
    { return functions->GetIntField(this, obj, fieldID); }
    jlong GetLongField(jobject obj, jfieldID fieldID)
    { return functions->GetLongField(this, obj, fieldID); }
    jfloat GetFloatField(jobject obj, jfieldID fieldID)
    { return functions->GetFloatField(this, obj, fieldID); }
    jdouble GetDoubleField(jobject obj, jfieldID fieldID)
    { return functions->GetDoubleField(this, obj, fieldID); }

    void SetObjectField(jobject obj, jfieldID fieldID, jobject value)
    { functions->SetObjectField(this, obj, fieldID, value); }
    void SetBooleanField(jobject obj, jfieldID fieldID, jboolean value)
    { functions->SetBooleanField(this, obj, fieldID, value); }
    void SetByteField(jobject obj, jfieldID fieldID, jbyte value)
    { functions->SetByteField(this, obj, fieldID, value); }
    void SetCharField(jobject obj, jfieldID fieldID, jchar value)
    { functions->SetCharField(this, obj, fieldID, value); }
    void SetShortField(jobject obj, jfieldID fieldID, jshort value)
    { functions->SetShortField(this, obj, fieldID, value); }
    void SetIntField(jobject obj, jfieldID fieldID, jint value)
    { functions->SetIntField(this, obj, fieldID, value); }
    void SetLongField(jobject obj, jfieldID fieldID, jlong value)
    { functions->SetLongField(this, obj, fieldID, value); }
    void SetFloatField(jobject obj, jfieldID fieldID, jfloat value)
    { functions->SetFloatField(this, obj, fieldID, value); }
    void SetDoubleField(jobject obj, jfieldID fieldID, jdouble value)
    { functions->SetDoubleField(this, obj, fieldID, value); }

    jmethodID GetStaticMethodID(jclass clazz, const char* name, const char* sig)
    { return functions->GetStaticMethodID(this, clazz, name, sig); }

#define CALL_STATIC_TYPE_METHOD(_jtype, _jname)                             \
    _jtype CallStatic##_jname##Method(jclass clazz, jmethodID methodID,     \
        ...)                                                                \
    {                                                                       \
        _jtype result;                                                      \
        va_list args;                                                       \
        va_start(args, methodID);                                           \
        result = functions->CallStatic##_jname##MethodV(this, clazz,        \
                    methodID, args);                                        \
        va_end(args);                                                       \
        return result;                                                      \
    }
#define CALL_STATIC_TYPE_METHODV(_jtype, _jname)                            \
    _jtype CallStatic##_jname##MethodV(jclass clazz, jmethodID methodID,    \
        va_list args)                                                       \
    { return functions->CallStatic##_jname##MethodV(this, clazz, methodID,  \
        args); }
#define CALL_STATIC_TYPE_METHODA(_jtype, _jname)                            \
    _jtype CallStatic##_jname##MethodA(jclass clazz, jmethodID methodID,    \
        jvalue* args)                                                       \
    { return functions->CallStatic##_jname##MethodA(this, clazz, methodID,  \
        args); }

#define CALL_STATIC_TYPE(_jtype, _jname)                                    \
    CALL_STATIC_TYPE_METHOD(_jtype, _jname)                                 \
    CALL_STATIC_TYPE_METHODV(_jtype, _jname)                                \
    CALL_STATIC_TYPE_METHODA(_jtype, _jname)

    CALL_STATIC_TYPE(jobject, Object)
    CALL_STATIC_TYPE(jboolean, Boolean)
    CALL_STATIC_TYPE(jbyte, Byte)
    CALL_STATIC_TYPE(jchar, Char)
    CALL_STATIC_TYPE(jshort, Short)
    CALL_STATIC_TYPE(jint, Int)
    CALL_STATIC_TYPE(jlong, Long)
    CALL_STATIC_TYPE(jfloat, Float)
    CALL_STATIC_TYPE(jdouble, Double)

    void CallStaticVoidMethod(jclass clazz, jmethodID methodID, ...)
    {
        va_list args;
        va_start(args, methodID);
        functions->CallStaticVoidMethodV(this, clazz, methodID, args);
        va_end(args);
    }
    void CallStaticVoidMethodV(jclass clazz, jmethodID methodID, va_list args)
    { functions->CallStaticVoidMethodV(this, clazz, methodID, args); }
    void CallStaticVoidMethodA(jclass clazz, jmethodID methodID, jvalue* args)
    { functions->CallStaticVoidMethodA(this, clazz, methodID, args); }

    jfieldID GetStaticFieldID(jclass clazz, const char* name, const char* sig)
    { return functions->GetStaticFieldID(this, clazz, name, sig); }

    jobject GetStaticObjectField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticObjectField(this, clazz, fieldID); }
    jboolean GetStaticBooleanField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticBooleanField(this, clazz, fieldID); }
    jbyte GetStaticByteField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticByteField(this, clazz, fieldID); }
    jchar GetStaticCharField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticCharField(this, clazz, fieldID); }
    jshort GetStaticShortField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticShortField(this, clazz, fieldID); }
    jint GetStaticIntField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticIntField(this, clazz, fieldID); }
    jlong GetStaticLongField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticLongField(this, clazz, fieldID); }
    jfloat GetStaticFloatField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticFloatField(this, clazz, fieldID); }
    jdouble GetStaticDoubleField(jclass clazz, jfieldID fieldID)
    { return functions->GetStaticDoubleField(this, clazz, fieldID); }

    void SetStaticObjectField(jclass clazz, jfieldID fieldID, jobject value)
    { functions->SetStaticObjectField(this, clazz, fieldID, value); }
    void SetStaticBooleanField(jclass clazz, jfieldID fieldID, jboolean value)
    { functions->SetStaticBooleanField(this, clazz, fieldID, value); }
    void SetStaticByteField(jclass clazz, jfieldID fieldID, jbyte value)
    { functions->SetStaticByteField(this, clazz, fieldID, value); }
    void SetStaticCharField(jclass clazz, jfieldID fieldID, jchar value)
    { functions->SetStaticCharField(this, clazz, fieldID, value); }
    void SetStaticShortField(jclass clazz, jfieldID fieldID, jshort value)
    { functions->SetStaticShortField(this, clazz, fieldID, value); }
    void SetStaticIntField(jclass clazz, jfieldID fieldID, jint value)
    { functions->SetStaticIntField(this, clazz, fieldID, value); }
    void SetStaticLongField(jclass clazz, jfieldID fieldID, jlong value)
    { functions->SetStaticLongField(this, clazz, fieldID, value); }
    void SetStaticFloatField(jclass clazz, jfieldID fieldID, jfloat value)
    { functions->SetStaticFloatField(this, clazz, fieldID, value); }
    void SetStaticDoubleField(jclass clazz, jfieldID fieldID, jdouble value)
    { functions->SetStaticDoubleField(this, clazz, fieldID, value); }

    jstring NewString(const jchar* unicodeChars, jsize len)
    { return functions->NewString(this, unicodeChars, len); }

    jsize GetStringLength(jstring string)
    { return functions->GetStringLength(this, string); }

    const jchar* GetStringChars(jstring string, jboolean* isCopy)
    { return functions->GetStringChars(this, string, isCopy); }

    void ReleaseStringChars(jstring string, const jchar* chars)
    { functions->ReleaseStringChars(this, string, chars); }

    jstring NewStringUTF(const char* bytes)
    { return functions->NewStringUTF(this, bytes); }

    jsize GetStringUTFLength(jstring string)
    { return functions->GetStringUTFLength(this, string); }

    const char* GetStringUTFChars(jstring string, jboolean* isCopy)
    { return functions->GetStringUTFChars(this, string, isCopy); }

    void ReleaseStringUTFChars(jstring string, const char* utf)
    { functions->ReleaseStringUTFChars(this, string, utf); }

    jsize GetArrayLength(jarray array)
    { return functions->GetArrayLength(this, array); }

    jobjectArray NewObjectArray(jsize length, jclass elementClass,
        jobject initialElement)
    { return functions->NewObjectArray(this, length, elementClass,
        initialElement); }

    jobject GetObjectArrayElement(jobjectArray array, jsize index)
    { return functions->GetObjectArrayElement(this, array, index); }

    void SetObjectArrayElement(jobjectArray array, jsize index, jobject value)
    { functions->SetObjectArrayElement(this, array, index, value); }

    jbooleanArray NewBooleanArray(jsize length)
    { return functions->NewBooleanArray(this, length); }
    jbyteArray NewByteArray(jsize length)
    { return functions->NewByteArray(this, length); }
    jcharArray NewCharArray(jsize length)
    { return functions->NewCharArray(this, length); }
    jshortArray NewShortArray(jsize length)
    { return functions->NewShortArray(this, length); }
    jintArray NewIntArray(jsize length)
    { return functions->NewIntArray(this, length); }
    jlongArray NewLongArray(jsize length)
    { return functions->NewLongArray(this, length); }
    jfloatArray NewFloatArray(jsize length)
    { return functions->NewFloatArray(this, length); }
    jdoubleArray NewDoubleArray(jsize length)
    { return functions->NewDoubleArray(this, length); }

    jboolean* GetBooleanArrayElements(jbooleanArray array, jboolean* isCopy)
    { return functions->GetBooleanArrayElements(this, array, isCopy); }
    jbyte* GetByteArrayElements(jbyteArray array, jboolean* isCopy)
    { return functions->GetByteArrayElements(this, array, isCopy); }
    jchar* GetCharArrayElements(jcharArray array, jboolean* isCopy)
    { return functions->GetCharArrayElements(this, array, isCopy); }
    jshort* GetShortArrayElements(jshortArray array, jboolean* isCopy)
    { return functions->GetShortArrayElements(this, array, isCopy); }
    jint* GetIntArrayElements(jintArray array, jboolean* isCopy)
    { return functions->GetIntArrayElements(this, array, isCopy); }
    jlong* GetLongArrayElements(jlongArray array, jboolean* isCopy)
    { return functions->GetLongArrayElements(this, array, isCopy); }
    jfloat* GetFloatArrayElements(jfloatArray array, jboolean* isCopy)
    { return functions->GetFloatArrayElements(this, array, isCopy); }
    jdouble* GetDoubleArrayElements(jdoubleArray array, jboolean* isCopy)
    { return functions->GetDoubleArrayElements(this, array, isCopy); }

    void ReleaseBooleanArrayElements(jbooleanArray array, jboolean* elems,
        jint mode)
    { functions->ReleaseBooleanArrayElements(this, array, elems, mode); }
    void ReleaseByteArrayElements(jbyteArray array, jbyte* elems,
        jint mode)
    { functions->ReleaseByteArrayElements(this, array, elems, mode); }
    void ReleaseCharArrayElements(jcharArray array, jchar* elems,
        jint mode)
    { functions->ReleaseCharArrayElements(this, array, elems, mode); }
    void ReleaseShortArrayElements(jshortArray array, jshort* elems,
        jint mode)
    { functions->ReleaseShortArrayElements(this, array, elems, mode); }
    void ReleaseIntArrayElements(jintArray array, jint* elems,
        jint mode)
    { functions->ReleaseIntArrayElements(this, array, elems, mode); }
    void ReleaseLongArrayElements(jlongArray array, jlong* elems,
        jint mode)
    { functions->ReleaseLongArrayElements(this, array, elems, mode); }
    void ReleaseFloatArrayElements(jfloatArray array, jfloat* elems,
        jint mode)
    { functions->ReleaseFloatArrayElements(this, array, elems, mode); }
    void ReleaseDoubleArrayElements(jdoubleArray array, jdouble* elems,
        jint mode)
    { functions->ReleaseDoubleArrayElements(this, array, elems, mode); }

    void GetBooleanArrayRegion(jbooleanArray array, jsize start, jsize len,
        jboolean* buf)
    { functions->GetBooleanArrayRegion(this, array, start, len, buf); }
    void GetByteArrayRegion(jbyteArray array, jsize start, jsize len,
        jbyte* buf)
    { functions->GetByteArrayRegion(this, array, start, len, buf); }
    void GetCharArrayRegion(jcharArray array, jsize start, jsize len,
        jchar* buf)
    { functions->GetCharArrayRegion(this, array, start, len, buf); }
    void GetShortArrayRegion(jshortArray array, jsize start, jsize len,
        jshort* buf)
    { functions->GetShortArrayRegion(this, array, start, len, buf); }
    void GetIntArrayRegion(jintArray array, jsize start, jsize len,
        jint* buf)
    { functions->GetIntArrayRegion(this, array, start, len, buf); }
    void GetLongArrayRegion(jlongArray array, jsize start, jsize len,
        jlong* buf)
    { functions->GetLongArrayRegion(this, array, start, len, buf); }
    void GetFloatArrayRegion(jfloatArray array, jsize start, jsize len,
        jfloat* buf)
    { functions->GetFloatArrayRegion(this, array, start, len, buf); }
    void GetDoubleArrayRegion(jdoubleArray array, jsize start, jsize len,
        jdouble* buf)
    { functions->GetDoubleArrayRegion(this, array, start, len, buf); }

    void SetBooleanArrayRegion(jbooleanArray array, jsize start, jsize len,
        const jboolean* buf)
    { functions->SetBooleanArrayRegion(this, array, start, len, buf); }
    void SetByteArrayRegion(jbyteArray array, jsize start, jsize len,
        const jbyte* buf)
    { functions->SetByteArrayRegion(this, array, start, len, buf); }
    void SetCharArrayRegion(jcharArray array, jsize start, jsize len,
        const jchar* buf)
    { functions->SetCharArrayRegion(this, array, start, len, buf); }
    void SetShortArrayRegion(jshortArray array, jsize start, jsize len,
        const jshort* buf)
    { functions->SetShortArrayRegion(this, array, start, len, buf); }
    void SetIntArrayRegion(jintArray array, jsize start, jsize len,
        const jint* buf)
    { functions->SetIntArrayRegion(this, array, start, len, buf); }
    void SetLongArrayRegion(jlongArray array, jsize start, jsize len,
        const jlong* buf)
    { functions->SetLongArrayRegion(this, array, start, len, buf); }
    void SetFloatArrayRegion(jfloatArray array, jsize start, jsize len,
        const jfloat* buf)
    { functions->SetFloatArrayRegion(this, array, start, len, buf); }
    void SetDoubleArrayRegion(jdoubleArray array, jsize start, jsize len,
        const jdouble* buf)
    { functions->SetDoubleArrayRegion(this, array, start, len, buf); }

    jint RegisterNatives(jclass clazz, const JNINativeMethod* methods,
        jint nMethods)
    { return functions->RegisterNatives(this, clazz, methods, nMethods); }

    jint UnregisterNatives(jclass clazz)
    { return functions->UnregisterNatives(this, clazz); }

    jint MonitorEnter(jobject obj)
    { return functions->MonitorEnter(this, obj); }

    jint MonitorExit(jobject obj)
    { return functions->MonitorExit(this, obj); }

    jint GetJavaVM(JavaVM** vm)
    { return functions->GetJavaVM(this, vm); }

    void GetStringRegion(jstring str, jsize start, jsize len, jchar* buf)
    { functions->GetStringRegion(this, str, start, len, buf); }

    void GetStringUTFRegion(jstring str, jsize start, jsize len, char* buf)
    { return functions->GetStringUTFRegion(this, str, start, len, buf); }

    void* GetPrimitiveArrayCritical(jarray array, jboolean* isCopy)
    { return functions->GetPrimitiveArrayCritical(this, array, isCopy); }

    void ReleasePrimitiveArrayCritical(jarray array, void* carray, jint mode)
    { functions->ReleasePrimitiveArrayCritical(this, array, carray, mode); }

    const jchar* GetStringCritical(jstring string, jboolean* isCopy)
    { return functions->GetStringCritical(this, string, isCopy); }

    void ReleaseStringCritical(jstring string, const jchar* carray)
    { functions->ReleaseStringCritical(this, string, carray); }

    jweak NewWeakGlobalRef(jobject obj)
    { return functions->NewWeakGlobalRef(this, obj); }

    void DeleteWeakGlobalRef(jweak obj)
    { functions->DeleteWeakGlobalRef(this, obj); }

    jboolean ExceptionCheck()
    { return functions->ExceptionCheck(this); }

    jobject NewDirectByteBuffer(void* address, jlong capacity)
    { return functions->NewDirectByteBuffer(this, address, capacity); }

    void* GetDirectBufferAddress(jobject buf)
    { return functions->GetDirectBufferAddress(this, buf); }

    jlong GetDirectBufferCapacity(jobject buf)
    { return functions->GetDirectBufferCapacity(this, buf); }

    /* added in JNI 1.6 */
    jobjectRefType GetObjectRefType(jobject obj)
    { return functions->GetObjectRefType(this, obj); }
#endif /*__cplusplus*/
};


/*
 * JNI invocation interface.
 */
struct JNIInvokeInterface {
    void*       reserved0;
    void*       reserved1;
    void*       reserved2;

    jint        (*DestroyJavaVM)(JavaVM*);
    jint        (*AttachCurrentThread)(JavaVM*, JNIEnv**, void*);
    jint        (*DetachCurrentThread)(JavaVM*);
    jint        (*GetEnv)(JavaVM*, void**, jint);
    jint        (*AttachCurrentThreadAsDaemon)(JavaVM*, JNIEnv**, void*);
};

/*
 * C++ version.
 */
struct _JavaVM {
    const struct JNIInvokeInterface* functions;

#if defined(__cplusplus)
    jint DestroyJavaVM()
    { return functions->DestroyJavaVM(this); }
    jint AttachCurrentThread(JNIEnv** p_env, void* thr_args)
    { return functions->AttachCurrentThread(this, p_env, thr_args); }
    jint DetachCurrentThread()
    { return functions->DetachCurrentThread(this); }
    jint GetEnv(void** env, jint version)
    { return functions->GetEnv(this, env, version); }
    jint AttachCurrentThreadAsDaemon(JNIEnv** p_env, void* thr_args)
    { return functions->AttachCurrentThreadAsDaemon(this, p_env, thr_args); }
#endif /*__cplusplus*/
};

struct JavaVMAttachArgs {
    jint        version;    /* must be >= JNI_VERSION_1_2 */
    const char* name;       /* NULL or name of thread as modified UTF-8 str */
    jobject     group;      /* global ref of a ThreadGroup object, or NULL */
};
typedef struct JavaVMAttachArgs JavaVMAttachArgs;

/*
 * JNI 1.2+ initialization.  (As of 1.6, the pre-1.2 structures are no
 * longer supported.)
 */
typedef struct JavaVMOption {
    const char* optionString;
    void*       extraInfo;
} JavaVMOption;

typedef struct JavaVMInitArgs {
    jint        version;    /* use JNI_VERSION_1_2 or later */

    jint        nOptions;
    JavaVMOption* options;
    jboolean    ignoreUnrecognized;
} JavaVMInitArgs;

#ifdef __cplusplus
extern "C" {
#endif
/*
 * VM initialization functions.
 *
 * Note these are the only symbols exported for JNI by the VM.
 */
jint JNI_GetDefaultJavaVMInitArgs(void*);
jint JNI_CreateJavaVM(JavaVM**, JNIEnv**, void*);
jint JNI_GetCreatedJavaVMs(JavaVM**, jsize, jsize*);

#define JNIIMPORT
#define JNIEXPORT  __attribute__ ((visibility ("default")))
#define JNICALL

/*
 * Prototypes for functions exported by loadable shared libs.  These are
 * called by JNI, not provided by JNI.
 */
JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved);
JNIEXPORT void JNI_OnUnload(JavaVM* vm, void* reserved);

#ifdef __cplusplus
}
#endif


/*
 * Manifest constants.
 */
#define JNI_FALSE   0
#define JNI_TRUE    1

#define JNI_VERSION_1_1 0x00010001
#define JNI_VERSION_1_2 0x00010002
#define JNI_VERSION_1_4 0x00010004
#define JNI_VERSION_1_6 0x00010006

#define JNI_OK          (0)         /* no error */
#define JNI_ERR         (-1)        /* generic error */
#define JNI_EDETACHED   (-2)        /* thread detached from the VM */
#define JNI_EVERSION    (-3)        /* JNI version error */

#define JNI_COMMIT      1           /* copy content, do not free buffer */
#define JNI_ABORT       2           /* free buffer w/o copying back */

#endif  /* JNI_H_ */






Added sqlite3/src/main/jni/sqlite/sqlite3.c.



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Added sqlite3/src/main/jni/sqlite/sqlite3.h.



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<resources>
    <string name="app_name">Database</string>
</resources>






Added sqlite3/src/test/java/org/sqlite/database/ExampleUnitTest.java.





















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package org.sqlite.database;

import org.junit.Test;

import static org.junit.Assert.*;

/**
 * To work on unit tests, switch the Test Artifact in the Build Variants view.
 */
public class ExampleUnitTest {
    @Test
    public void addition_isCorrect() throws Exception {
        assertEquals(4, 2 + 2);
    }
}






Added sqlite3test/build.gradle.

































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apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion '24.0.3'

    defaultConfig {
        applicationId "org.sqlite.customsqlitetest"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile project(':sqlite3')
}






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# Add project specific ProGuard rules here.
# By default, the flags in this file are appended to flags specified
# in /home/dan/Android/Sdk/tools/proguard/proguard-android.txt
# You can edit the include path and order by changing the proguardFiles
# directive in build.gradle.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

# Add any project specific keep options here:

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}






Added sqlite3test/src/androidTest/java/org/sqlite/customsqlitetest/ApplicationTest.java.



















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package org.sqlite.customsqlitetest;

import android.app.Application;
import android.test.ApplicationTestCase;

/**
 * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
 */
public class ApplicationTest extends ApplicationTestCase<Application> {
    public ApplicationTest() {
        super(Application.class);
    }
}






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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.sqlite.customsqlitetest">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>






Added sqlite3test/src/main/java/org/sqlite/customsqlitetest/MainActivity.java.

























































































































































































































































































































































































































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package org.sqlite.customsqlitetest;

import android.content.Context;
import android.database.Cursor;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

import org.sqlite.database.DatabaseErrorHandler;
import org.sqlite.database.sqlite.SQLiteDatabase;
import org.sqlite.database.sqlite.SQLiteStatement;
import org.sqlite.database.sqlite.SQLiteDatabaseCorruptException;
import org.sqlite.database.sqlite.SQLiteOpenHelper;

import java.io.File;
import java.io.FileInputStream;
import java.util.Arrays;


class DoNotDeleteErrorHandler implements DatabaseErrorHandler {
    private static final String TAG = "DoNotDeleteErrorHandler";
    public void onCorruption(SQLiteDatabase dbObj) {
        Log.e(TAG, "Corruption reported by sqlite on database: " + dbObj.getPath());
    }
}

public class MainActivity extends AppCompatActivity {

    private TextView myTV;          /* Text view widget */
    private int myNTest;            /* Number of tests attempted */
    private int myNErr;             /* Number of tests failed */

    File DB_PATH;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myTV = (TextView)findViewById(R.id.tv_widget);
    }

    public void report_version(){
        SQLiteDatabase db = null;
        SQLiteStatement st;
        String res;

        db = SQLiteDatabase.openOrCreateDatabase(":memory:", null);
        st = db.compileStatement("SELECT sqlite_version()");
        res = st.simpleQueryForString();

        myTV.append("SQLite version " + res + "\n\n");
    }

    public void test_warning(String name, String warning){
        myTV.append("WARNING:" + name + ": " + warning + "\n");
    }

    public void test_result(String name, String res, String expected){
        myTV.append(name + "... ");
        myNTest++;

        if( res.equals(expected) ){
            myTV.append("ok\n");
        } else {
            myNErr++;
            myTV.append("FAILED\n");
            myTV.append("   res=     \"" + res + "\"\n");
            myTV.append("   expected=\"" + expected + "\"\n");
        }
    }

    /*
    ** Test if the database at DB_PATH is encrypted or not. The db
    ** is assumed to be encrypted if the first 6 bytes are anything
    ** other than "SQLite".
    **
    ** If the test reveals that the db is encrypted, return the string
    ** "encrypted". Otherwise, "unencrypted".
    */
    public String db_is_encrypted() throws Exception {
        FileInputStream in = new FileInputStream(DB_PATH);

        byte[] buffer = new byte[6];
        in.read(buffer, 0, 6);

        String res = "encrypted";
        if( Arrays.equals(buffer, (new String("SQLite")).getBytes()) ){
            res = "unencrypted";
        }
        return res;
    }

    /*
    ** Test that a database connection may be accessed from a second thread.
    */
    public void thread_test_1(){
        SQLiteDatabase.deleteDatabase(DB_PATH);
        final SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);

        String db_path2 = DB_PATH.toString() + "2";

        db.execSQL("CREATE TABLE t1(x, y)");
        db.execSQL("INSERT INTO t1 VALUES (1, 2), (3, 4)");

        Thread t = new Thread( new Runnable() {
            public void run() {
                SQLiteStatement st = db.compileStatement("SELECT sum(x+y) FROM t1");
                String res = st.simpleQueryForString();
                test_result("thread_test_1", res, "10");
            }
        });

        t.start();
        try {
            t.join();
        } catch (InterruptedException e) {
        }
    }

    /*
    ** Test that a database connection may be accessed from a second thread.
    */
    public void thread_test_2(){
        SQLiteDatabase.deleteDatabase(DB_PATH);
        final SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);

        db.execSQL("CREATE TABLE t1(x, y)");
        db.execSQL("INSERT INTO t1 VALUES (1, 2), (3, 4)");

        db.enableWriteAheadLogging();
        db.beginTransactionNonExclusive();
        db.execSQL("INSERT INTO t1 VALUES (5, 6)");

        Thread t = new Thread( new Runnable() {
            public void run() {
                SQLiteStatement st = db.compileStatement("SELECT sum(x+y) FROM t1");
                String res = st.simpleQueryForString();
            }
        });

        t.start();
        String res = "concurrent";

        int i;
        for(i=0; i<20 && t.isAlive(); i++){
            try { Thread.sleep(100); } catch(InterruptedException e) {}
        }
        if( t.isAlive() ){ res = "blocked"; }

        db.endTransaction();
        try { t.join(); } catch(InterruptedException e) {}
        if( SQLiteDatabase.hasCodec() ){
            test_result("thread_test_2", res, "blocked");
        } else {
            test_result("thread_test_2", res, "concurrent");
        }
    }

    /*
    ** Use a Cursor to loop through the results of a SELECT query.
    */
    public void csr_test_2() throws Exception {
        SQLiteDatabase.deleteDatabase(DB_PATH);
        SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);
        String res = "";
        String expect = "";
        int i;
        int nRow = 0;

        db.execSQL("CREATE TABLE t1(x)");
        db.execSQL("BEGIN");
        for(i=0; i<1000; i++){
            db.execSQL("INSERT INTO t1 VALUES ('one'), ('two'), ('three')");
            expect += ".one.two.three";
        }
        db.execSQL("COMMIT");
        Cursor c = db.rawQuery("SELECT x FROM t1", null);
        if( c!=null ){
            boolean bRes;
            for(bRes=c.moveToFirst(); bRes; bRes=c.moveToNext()){
                String x = c.getString(0);
                res = res + "." + x;
            }
        }else{
            test_warning("csr_test_1", "c==NULL");
        }
        test_result("csr_test_2.1", res, expect);

        db.execSQL("BEGIN");
        for(i=0; i<1000; i++){
            db.execSQL("INSERT INTO t1 VALUES (X'123456'), (X'789ABC'), (X'DEF012')");
            db.execSQL("INSERT INTO t1 VALUES (45), (46), (47)");
            db.execSQL("INSERT INTO t1 VALUES (8.1), (8.2), (8.3)");
            db.execSQL("INSERT INTO t1 VALUES (NULL), (NULL), (NULL)");
        }
        db.execSQL("COMMIT");

        c = db.rawQuery("SELECT x FROM t1", null);
        if( c!=null ){
            boolean bRes;
            for(bRes=c.moveToFirst(); bRes; bRes=c.moveToNext()) nRow++;
        }else{
            test_warning("csr_test_1", "c==NULL");
        }
        test_result("csr_test_2.2", "" + nRow, "15000");

        db.close();
    }

    public String string_from_t1_x(SQLiteDatabase db){
        String res = "";

        Cursor c = db.rawQuery("SELECT x FROM t1", null);
        boolean bRes;
        for(bRes=c.moveToFirst(); bRes; bRes=c.moveToNext()){
            String x = c.getString(0);
            res = res + "." + x;
        }

        return res;
    }
    public void csr_test_1() throws Exception {
        SQLiteDatabase.deleteDatabase(DB_PATH);
        SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);
        String res = "";

        db.execSQL("CREATE TABLE t1(x)");
        db.execSQL("INSERT INTO t1 VALUES ('one'), ('two'), ('three')");

        res = string_from_t1_x(db);
        test_result("csr_test_1.1", res, ".one.two.three");

        db.close();
        test_result("csr_test_1.2", db_is_encrypted(), "unencrypted");
    }

    public void stmt_jrnl_test_1() throws Exception {
        SQLiteDatabase.deleteDatabase(DB_PATH);
        SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);
        String res = "";

        db.execSQL("CREATE TABLE t1(x, y UNIQUE)");
        db.execSQL("BEGIN");
        db.execSQL("INSERT INTO t1 VALUES(1, 1), (2, 2), (3, 3)");
        db.execSQL("UPDATE t1 SET y=y+3");
        db.execSQL("COMMIT");
        db.close();
        test_result("stmt_jrnl_test_1.1", "did not crash", "did not crash");
    }


    public void supp_char_test_1() throws Exception {
        SQLiteDatabase.deleteDatabase(DB_PATH);
        SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);
        String res = "";
        String smiley = new String( Character.toChars(0x10000) );

        db.execSQL("CREATE TABLE t1(x)");
        db.execSQL("INSERT INTO t1 VALUES ('a" + smiley + "b')");

        res = string_from_t1_x(db);

        test_result("supp_char_test1." + smiley, res, ".a" + smiley + "b");

        db.close();
    }

    /*
    ** If this is a SEE build, check that encrypted databases work.
    */
    public void see_test_1() throws Exception {
        if( !SQLiteDatabase.hasCodec() ) return;

        SQLiteDatabase.deleteDatabase(DB_PATH);
        String res = "";

        SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);
        db.execSQL("PRAGMA key = 'secretkey'");

        db.execSQL("CREATE TABLE t1(x)");
        db.execSQL("INSERT INTO t1 VALUES ('one'), ('two'), ('three')");

        res = string_from_t1_x(db);
        test_result("see_test_1.1", res, ".one.two.three");
        db.close();

        test_result("see_test_1.2", db_is_encrypted(), "encrypted");

        db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);
        db.execSQL("PRAGMA key = 'secretkey'");
        res = string_from_t1_x(db);
        test_result("see_test_1.3", res, ".one.two.three");
        db.close();

        res = "unencrypted";
        try {
            db = SQLiteDatabase.openOrCreateDatabase(DB_PATH.getPath(), null);
            string_from_t1_x(db);
        } catch ( SQLiteDatabaseCorruptException e ){
            res = "encrypted";
        } finally {
            db.close();
        }
        test_result("see_test_1.4", res, "encrypted");

        res = "unencrypted";
        try {
            db = SQLiteDatabase.openOrCreateDatabase(DB_PATH.getPath(), null);
            db.execSQL("PRAGMA key = 'otherkey'");
            string_from_t1_x(db);
        } catch ( SQLiteDatabaseCorruptException e ){
            res = "encrypted";
        } finally {
            db.close();
        }
        test_result("see_test_1.5", res, "encrypted");
    }
    class MyHelper extends SQLiteOpenHelper {
        public MyHelper(Context ctx){
            super(ctx, DB_PATH.getPath(), null, 1);
        }
        public void onConfigure(SQLiteDatabase db){
            db.execSQL("PRAGMA key = 'secret'");
        }
        public void onCreate(SQLiteDatabase db){
            db.execSQL("CREATE TABLE t1(x)");
        }
        public void onUpgrade(SQLiteDatabase db, int iOld, int iNew){
        }
    }

    /*
    ** Check that SQLiteOpenHelper works.
    */
    public void helper_test_1() throws Exception {
        SQLiteDatabase.deleteDatabase(DB_PATH);

        MyHelper helper = new MyHelper(this);
        SQLiteDatabase db = helper.getWritableDatabase();
        db.execSQL("INSERT INTO t1 VALUES ('x'), ('y'), ('z')");

        String res = string_from_t1_x(db);
        test_result("helper.1", res, ".x.y.z");

        helper.close();
    }

    /*
    ** If this is a SEE build, check that SQLiteOpenHelper still works.
    */
    public void see_test_2() throws Exception {
        if( !SQLiteDatabase.hasCodec() ) return;
        SQLiteDatabase.deleteDatabase(DB_PATH);

        MyHelper helper = new MyHelper(this);
        SQLiteDatabase db = helper.getWritableDatabase();
        db.execSQL("INSERT INTO t1 VALUES ('x'), ('y'), ('z')");

        String res = string_from_t1_x(db);
        test_result("see_test_2.1", res, ".x.y.z");
        test_result("see_test_2.2", db_is_encrypted(), "encrypted");

        helper.close();
        helper = new MyHelper(this);
        db = helper.getReadableDatabase();
        test_result("see_test_2.3", res, ".x.y.z");

        db = helper.getWritableDatabase();
        test_result("see_test_2.4", res, ".x.y.z");

        test_result("see_test_2.5", db_is_encrypted(), "encrypted");
    }

    public void run_the_tests(View view){
        System.loadLibrary("sqliteX");
        DB_PATH = getApplicationContext().getDatabasePath("test.db");
        DB_PATH.getParentFile().mkdirs();

        myTV.setText("");
        myNErr = 0;
        myNTest = 0;

        try {
            report_version();
            helper_test_1();
            supp_char_test_1();
            csr_test_1();
            csr_test_2();
            thread_test_1();
            thread_test_2();
            see_test_1();
            see_test_2();
            stmt_jrnl_test_1();

            myTV.append("\n" + myNErr + " errors from " + myNTest + " tests\n");
        } catch(Exception e) {
            myTV.append("Exception: " + e.toString() + "\n");
            myTV.append(android.util.Log.getStackTraceString(e) + "\n");
        }
    }
}






Added sqlite3test/src/main/res/layout/activity_main.xml.




















































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<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="org.sqlite.customsqlitetest.MainActivity">

    <ScrollView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/scrollView"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" >

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Run all tests!"
                android:id="@+id/button"
                android:layout_gravity="center_horizontal"
                android:onClick="run_the_tests" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="New Text"
                android:id="@+id/tv_widget"
                android:layout_alignTop="@+id/scrollView"
                android:layout_centerHorizontal="true" />
        </LinearLayout>
    </ScrollView>

</RelativeLayout>






Added sqlite3test/src/main/res/mipmap-hdpi/ic_launcher.png.



cannot compute difference between binary files


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cannot compute difference between binary files


Added sqlite3test/src/main/res/mipmap-xxhdpi/ic_launcher.png.



cannot compute difference between binary files


Added sqlite3test/src/main/res/mipmap-xxxhdpi/ic_launcher.png.



cannot compute difference between binary files


Added sqlite3test/src/main/res/values-w820dp/dimens.xml.












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<resources>
    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
         (such as screen margins) for screens with more than 820dp of available width. This
         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
    <dimen name="activity_horizontal_margin">64dp</dimen>
</resources>






Added sqlite3test/src/main/res/values/colors.xml.












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<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#3F51B5</color>
    <color name="colorPrimaryDark">#303F9F</color>
    <color name="colorAccent">#FF4081</color>
</resources>






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<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
</resources>






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<resources>
    <string name="app_name">CustomsqliteTest</string>
</resources>






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<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

</resources>






Added sqlite3test/src/test/java/org/sqlite/customsqlitetest/ExampleUnitTest.java.





















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package org.sqlite.customsqlitetest;

import org.junit.Test;

import static org.junit.Assert.*;

/**
 * To work on unit tests, switch the Test Artifact in the Build Variants view.
 */
public class ExampleUnitTest {
    @Test
    public void addition_isCorrect() throws Exception {
        assertEquals(4, 2 + 2);
    }
}






Deleted src/org/sqlite/app/customsqlite/CustomSqlite.java.





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package org.sqlite.app.customsqlite;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

import java.io.File;
import java.io.FileInputStream;
import java.util.Arrays;

import java.lang.InterruptedException;

import org.sqlite.database.sqlite.SQLiteDatabase;
import org.sqlite.database.sqlite.SQLiteStatement;
import org.sqlite.database.sqlite.SQLiteDatabaseCorruptException;

import android.database.Cursor;

/*
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteStatement;
*/

import org.sqlite.database.DatabaseErrorHandler;
class DoNotDeleteErrorHandler implements DatabaseErrorHandler {
  private static final String TAG = "DoNotDeleteErrorHandler";
  public void onCorruption(SQLiteDatabase dbObj) {
    Log.e(TAG, "Corruption reported by sqlite on database: " + dbObj.getPath());
  }
}

public class CustomSqlite extends Activity
{
  private TextView myTV;          /* Text view widget */
  private int myNTest;            /* Number of tests attempted */
  private int myNErr;             /* Number of tests failed */

  File DB_PATH;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    myTV = (TextView)findViewById(R.id.tv_widget);
  }

  public void report_version(){
    SQLiteDatabase db = null;
    SQLiteStatement st;
    String res;

    db = SQLiteDatabase.openOrCreateDatabase(":memory:", null);
    st = db.compileStatement("SELECT sqlite_version()");
    res = st.simpleQueryForString();

    myTV.append("SQLite version " + res + "\n\n");
  }

  public void test_warning(String name, String warning){
    myTV.append("WARNING:" + name + ": " + warning + "\n");
  }

  public void test_result(String name, String res, String expected){
    myTV.append(name + "... ");
    myNTest++;

    if( res.equals(expected) ){
      myTV.append("ok\n");
    } else {
      myNErr++;
      myTV.append("FAILED\n");
      myTV.append("   res=     \"" + res + "\"\n");
      myTV.append("   expected=\"" + expected + "\"\n");
    }
  }

  /*
  ** Test if the database at DB_PATH is encrypted or not. The db
  ** is assumed to be encrypted if the first 6 bytes are anything
  ** other than "SQLite".
  **
  ** If the test reveals that the db is encrypted, return the string
  ** "encrypted". Otherwise, "unencrypted".
  */
  public String db_is_encrypted() throws Exception {
    FileInputStream in = new FileInputStream(DB_PATH);

    byte[] buffer = new byte[6];
    in.read(buffer, 0, 6);

    String res = "encrypted";
    if( Arrays.equals(buffer, (new String("SQLite")).getBytes()) ){
      res = "unencrypted";
    }
    return res;
  }

  /*
  ** Test that a database connection may be accessed from a second thread.
  */
  public void thread_test_1(){
    SQLiteDatabase.deleteDatabase(DB_PATH);
    final SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);

    String db_path2 = DB_PATH.toString() + "2";

    db.execSQL("CREATE TABLE t1(x, y)");
    db.execSQL("INSERT INTO t1 VALUES (1, 2), (3, 4)");

    Thread t = new Thread( new Runnable() {
      public void run() {
        SQLiteStatement st = db.compileStatement("SELECT sum(x+y) FROM t1");
        String res = st.simpleQueryForString();
        test_result("thread_test_1", res, "10");
      }
    });

    t.start();
    try {
      t.join();
    } catch (InterruptedException e) {
    }
  }

  /*
  ** Use a Cursor to loop through the results of a SELECT query.
  */
  public void csr_test_1() throws Exception {
    SQLiteDatabase.deleteDatabase(DB_PATH);
    SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);
    String res = "";

    db.execSQL("CREATE TABLE t1(x)");
    db.execSQL("INSERT INTO t1 VALUES ('one'), ('two'), ('three')");
    
    Cursor c = db.rawQuery("SELECT x FROM t1", null);
    if( c!=null ){
      boolean bRes;
      for(bRes=c.moveToFirst(); bRes; bRes=c.moveToNext()){
        String x = c.getString(0);
        res = res + "." + x;
      }
    }else{
      test_warning("csr_test_1", "c==NULL");
    }
    test_result("csr_test_1.1", res, ".one.two.three");

    db.close();
    test_result("csr_test_1.2", db_is_encrypted(), "unencrypted");
  }

  public String string_from_t1_x(SQLiteDatabase db){
    String res = "";

    Cursor c = db.rawQuery("SELECT x FROM t1", null);
    boolean bRes;
    for(bRes=c.moveToFirst(); bRes; bRes=c.moveToNext()){
      String x = c.getString(0);
      res = res + "." + x;
    }

    return res;
  }

  /*
  ** Check that using openSeeDatabase() creates encrypted databases. 
  */
  public void see_test_1() throws Exception {
    if( !SQLiteDatabase.hasCodec() ) return;

    SQLiteDatabase.deleteDatabase(DB_PATH);
    String res = "";
    
    SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(DB_PATH, null);
    db.execSQL("PRAGMA key = 'secretkey'");

    db.execSQL("CREATE TABLE t1(x)");
    db.execSQL("INSERT INTO t1 VALUES ('one'), ('two'), ('three')");
    
    res = string_from_t1_x(db);
    test_result("see_test_1.1", res, ".one.two.three");
    db.close();

    test_result("see_test_1.2", db_is_encrypted(), "encrypted");

    db = SQLiteDatabase.openOrCreateDatabase(DB_PATH.getPath(), null, new DoNotDeleteErrorHandler());
    db.execSQL("PRAGMA key = 'secretkey'");
    res = string_from_t1_x(db);
    test_result("see_test_1.3", res, ".one.two.three");
    db.close();

    res = "unencrypted";
    try {
      db = SQLiteDatabase.openOrCreateDatabase(
	  DB_PATH.getPath(), null, new DoNotDeleteErrorHandler()
      );
      string_from_t1_x(db);
    } catch ( SQLiteDatabaseCorruptException e ){
      res = "encrypted";
    } finally {
      db.close();
    }
    test_result("see_test_1.4", res, "encrypted");

    res = "unencrypted";
    try {
      db = SQLiteDatabase.openOrCreateDatabase(
	  DB_PATH.getPath(), null, new DoNotDeleteErrorHandler()
      );
      db.execSQL("PRAGMA key = 'otherkey'");
      string_from_t1_x(db);
    } catch ( SQLiteDatabaseCorruptException e ){
      res = "encrypted";
    } finally {
      db.close();
    }
    test_result("see_test_1.5", res, "encrypted");
  }

  public void run_the_tests(View view){
    System.loadLibrary("sqliteX");
    DB_PATH = getApplicationContext().getDatabasePath("test.db");
    DB_PATH.mkdirs();

    myTV.setText("");
    myNErr = 0;
    myNTest = 0;

    try {
      report_version();
      csr_test_1();
      thread_test_1();
      see_test_1();

      myTV.append("\n" + myNErr + " errors from " + myNTest + " tests\n");
    } catch(Exception e) {
      myTV.append("Exception: " + e.toString() + "\n");
      myTV.append(android.util.Log.getStackTraceString(e) + "\n");
    }
  }
}








Deleted src/org/sqlite/database/DatabaseErrorHandler.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database;

import org.sqlite.database.sqlite.SQLiteDatabase;

/**
 * An interface to let the apps define the actions to take when the following errors are detected
 *   database corruption
 */
public interface DatabaseErrorHandler {

    /**
     * defines the method to be invoked when database corruption is detected.
     * @param dbObj the {@link SQLiteDatabase} object representing the database on which corruption
     * is detected.
     */
    void onCorruption(SQLiteDatabase dbObj);
}






Deleted src/org/sqlite/database/DefaultDatabaseErrorHandler.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sqlite.database;

import java.io.File;
import java.util.List;

import org.sqlite.database.sqlite.SQLiteDatabase;
import org.sqlite.database.sqlite.SQLiteException;
import android.util.Log;
import android.util.Pair;

/**
 * Default class used to define the actions to take when the database corruption is reported
 * by sqlite.
 * <p>
 * An application can specify an implementation of {@link DatabaseErrorHandler} on the
 * following:
 * <ul>
 *   <li>{@link SQLiteDatabase#openOrCreateDatabase(String,
 *      org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory, DatabaseErrorHandler)}</li>
 *   <li>{@link SQLiteDatabase#openDatabase(String,
 *      org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory, int, DatabaseErrorHandler)}</li>
 * </ul>
 * The specified {@link DatabaseErrorHandler} is used to handle database corruption errors, if they
 * occur.
 * <p>
 * If null is specified for DatabaeErrorHandler param in the above calls, then this class is used
 * as the default {@link DatabaseErrorHandler}.
 */
public final class DefaultDatabaseErrorHandler implements DatabaseErrorHandler {

    private static final String TAG = "DefaultDatabaseErrorHandler";

    /**
     * defines the default method to be invoked when database corruption is detected.
     * @param dbObj the {@link SQLiteDatabase} object representing the database on which corruption
     * is detected.
     */
    public void onCorruption(SQLiteDatabase dbObj) {
        Log.e(TAG, "Corruption reported by sqlite on database: " + dbObj.getPath());

        // is the corruption detected even before database could be 'opened'?
        if (!dbObj.isOpen()) {
            // database files are not even openable. delete this database file.
            // NOTE if the database has attached databases, then any of them could be corrupt.
            // and not deleting all of them could cause corrupted database file to remain and 
            // make the application crash on database open operation. To avoid this problem,
            // the application should provide its own {@link DatabaseErrorHandler} impl class
            // to delete ALL files of the database (including the attached databases).
            deleteDatabaseFile(dbObj.getPath());
            return;
        }

        List<Pair<String, String>> attachedDbs = null;
        try {
            // Close the database, which will cause subsequent operations to fail.
            // before that, get the attached database list first.
            try {
                attachedDbs = dbObj.getAttachedDbs();
            } catch (SQLiteException e) {
                /* ignore */
            }
            try {
                dbObj.close();
            } catch (SQLiteException e) {
                /* ignore */
            }
        } finally {
            // Delete all files of this corrupt database and/or attached databases
            if (attachedDbs != null) {
                for (Pair<String, String> p : attachedDbs) {
                    deleteDatabaseFile(p.second);
                }
            } else {
                // attachedDbs = null is possible when the database is so corrupt that even
                // "PRAGMA database_list;" also fails. delete the main database file
                deleteDatabaseFile(dbObj.getPath());
            }
        }
    }

    private void deleteDatabaseFile(String fileName) {
        if (fileName.equalsIgnoreCase(":memory:") || fileName.trim().length() == 0) {
            return;
        }
        Log.e(TAG, "deleting the database file: " + fileName);
        try {
            SQLiteDatabase.deleteDatabase(new File(fileName));
        } catch (Exception e) {
            /* print warning and ignore exception */
            Log.w(TAG, "delete failed: " + e.getMessage());
        }
    }
}






Deleted src/org/sqlite/database/SQLException.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database;

/**
 * An exception that indicates there was an error with SQL parsing or execution.
 */
public class SQLException extends RuntimeException {
    public SQLException() {
    }

    public SQLException(String error) {
        super(error);
    }

    public SQLException(String error, Throwable cause) {
        super(error, cause);
    }
}






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<HTML>
<BODY>
Contains classes to explore data returned through a content provider.
<p>
If you need to manage data in a private database, use the {@link
android.database.sqlite} classes. These classes are used to manage the {@link
android.database.Cursor} object returned from a content provider query. Databases
are usually created and opened with {@link android.content.Context#openOrCreateDatabase}
To make requests through
content providers, you can use the {@link android.content.ContentResolver
content.ContentResolver} class.
<p>All databases are stored on the device in <code>/data/data/&lt;package_name&gt;/databases</code>
</BODY>
</HTML>






Deleted src/org/sqlite/database/sqlite/CloseGuard.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package dalvik.system;

/**
 * CloseGuard is a mechanism for flagging implicit finalizer cleanup of
 * resources that should have been cleaned up by explicit close
 * methods (aka "explicit termination methods" in Effective Java).
 * <p>
 * A simple example: <pre>   {@code
 *   class Foo {
 *
 *       private final CloseGuard guard = CloseGuard.get();
 *
 *       ...
 *
 *       public Foo() {
 *           ...;
 *           guard.open("cleanup");
 *       }
 *
 *       public void cleanup() {
 *          guard.close();
 *          ...;
 *       }
 *
 *       protected void finalize() throws Throwable {
 *           try {
 *               if (guard != null) {
 *                   guard.warnIfOpen();
 *               }
 *               cleanup();
 *           } finally {
 *               super.finalize();
 *           }
 *       }
 *   }
 * }</pre>
 *
 * In usage where the resource to be explicitly cleaned up are
 * allocated after object construction, CloseGuard protection can
 * be deferred. For example: <pre>   {@code
 *   class Bar {
 *
 *       private final CloseGuard guard = CloseGuard.get();
 *
 *       ...
 *
 *       public Bar() {
 *           ...;
 *       }
 *
 *       public void connect() {
 *          ...;
 *          guard.open("cleanup");
 *       }
 *
 *       public void cleanup() {
 *          guard.close();
 *          ...;
 *       }
 *
 *       protected void finalize() throws Throwable {
 *           try {
 *               if (guard != null) {
 *                   guard.warnIfOpen();
 *               }
 *               cleanup();
 *           } finally {
 *               super.finalize();
 *           }
 *       }
 *   }
 * }</pre>
 *
 * When used in a constructor calls to {@code open} should occur at
 * the end of the constructor since an exception that would cause
 * abrupt termination of the constructor will mean that the user will
 * not have a reference to the object to cleanup explicitly. When used
 * in a method, the call to {@code open} should occur just after
 * resource acquisition.
 *
 * <p>
 *
 * Note that the null check on {@code guard} in the finalizer is to
 * cover cases where a constructor throws an exception causing the
 * {@code guard} to be uninitialized.
 *
 * @hide
 */
public final class CloseGuard {

    /**
     * Instance used when CloseGuard is disabled to avoid allocation.
     */
    private static final CloseGuard NOOP = new CloseGuard();

    /**
     * Enabled by default so we can catch issues early in VM startup.
     * Note, however, that Android disables this early in its startup,
     * but enables it with DropBoxing for system apps on debug builds.
     */
    private static volatile boolean ENABLED = true;

    /**
     * Hook for customizing how CloseGuard issues are reported.
     */
    private static volatile Reporter REPORTER = new DefaultReporter();

    /**
     * Returns a CloseGuard instance. If CloseGuard is enabled, {@code
     * #open(String)} can be used to set up the instance to warn on
     * failure to close. If CloseGuard is disabled, a non-null no-op
     * instance is returned.
     */
    public static CloseGuard get() {
        if (!ENABLED) {
            return NOOP;
        }
        return new CloseGuard();
    }

    /**
     * Used to enable or disable CloseGuard. Note that CloseGuard only
     * warns if it is enabled for both allocation and finalization.
     */
    public static void setEnabled(boolean enabled) {
        ENABLED = enabled;
    }

    /**
     * Used to replace default Reporter used to warn of CloseGuard
     * violations. Must be non-null.
     */
    public static void setReporter(Reporter reporter) {
        if (reporter == null) {
            throw new NullPointerException("reporter == null");
        }
        REPORTER = reporter;
    }

    /**
     * Returns non-null CloseGuard.Reporter.
     */
    public static Reporter getReporter() {
        return REPORTER;
    }

    private CloseGuard() {}

    /**
     * If CloseGuard is enabled, {@code open} initializes the instance
     * with a warning that the caller should have explicitly called the
     * {@code closer} method instead of relying on finalization.
     *
     * @param closer non-null name of explicit termination method
     * @throws NullPointerException if closer is null, regardless of
     * whether or not CloseGuard is enabled
     */
    public void open(String closer) {
        // always perform the check for valid API usage...
        if (closer == null) {
            throw new NullPointerException("closer == null");
        }
        // ...but avoid allocating an allocationSite if disabled
        if (this == NOOP || !ENABLED) {
            return;
        }
        String message = "Explicit termination method '" + closer + "' not called";
        allocationSite = new Throwable(message);
    }

    private Throwable allocationSite;

    /**
     * Marks this CloseGuard instance as closed to avoid warnings on
     * finalization.
     */
    public void close() {
        allocationSite = null;
    }

    /**
     * If CloseGuard is enabled, logs a warning if the caller did not
     * properly cleanup by calling an explicit close method
     * before finalization. If CloseGuard is disabled, no action is
     * performed.
     */
    public void warnIfOpen() {
        if (allocationSite == null || !ENABLED) {
            return;
        }

        String message =
                ("A resource was acquired at attached stack trace but never released. "
                 + "See java.io.Closeable for information on avoiding resource leaks.");

        REPORTER.report(message, allocationSite);
    }

    /**
     * Interface to allow customization of reporting behavior.
     */
    public static interface Reporter {
        public void report (String message, Throwable allocationSite);
    }

    /**
     * Default Reporter which reports CloseGuard violations to the log.
     */
    private static final class DefaultReporter implements Reporter {
        @Override public void report (String message, Throwable allocationSite) {
            /* System.logW(message, allocationSite); */
        }
    }
}






Deleted src/org/sqlite/database/sqlite/DatabaseObjectNotClosedException.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that garbage-collector is finalizing a database object
 * that is not explicitly closed
 * @hide
 */
public class DatabaseObjectNotClosedException extends RuntimeException {
    private static final String s = "Application did not close the cursor or database object " +
            "that was opened here";

    public DatabaseObjectNotClosedException() {
        super(s);
    }
}






Deleted src/org/sqlite/database/sqlite/ExtraUtils.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database;
import android.database.Cursor;
import android.database.CursorWindow;

/* import org.apache.commons.codec.binary.Hex; */

import android.content.ContentValues;
import android.content.Context;
import android.content.OperationApplicationException;
import org.sqlite.database.sqlite.SQLiteAbortException;
import org.sqlite.database.sqlite.SQLiteConstraintException;
import org.sqlite.database.sqlite.SQLiteDatabase;
import org.sqlite.database.sqlite.SQLiteDatabaseCorruptException;
import org.sqlite.database.sqlite.SQLiteDiskIOException;
import org.sqlite.database.sqlite.SQLiteException;
import org.sqlite.database.sqlite.SQLiteFullException;
import org.sqlite.database.sqlite.SQLiteProgram;
import org.sqlite.database.sqlite.SQLiteStatement;
import android.os.OperationCanceledException;
import android.os.Parcel;
import android.os.ParcelFileDescriptor;
import android.text.TextUtils;
import android.util.Log;

import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.text.Collator;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

/**
 * Static utility methods for dealing with databases and {@link Cursor}s.
 */
public class ExtraUtils {
    private static final String TAG = "ExtraUtils";

    private static final boolean DEBUG = false;

    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_SELECT = 1;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_UPDATE = 2;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_ATTACH = 3;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_BEGIN = 4;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_COMMIT = 5;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_ABORT = 6;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_PRAGMA = 7;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_DDL = 8;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_UNPREPARED = 9;
    /** One of the values returned by {@link #getSqlStatementType(String)}. */
    public static final int STATEMENT_OTHER = 99;

    /**
     * Returns column index of "_id" column, or -1 if not found.
     */
    public static int findRowIdColumnIndex(String[] columnNames) {
        int length = columnNames.length;
        for (int i = 0; i < length; i++) {
            if (columnNames[i].equals("_id")) {
                return i;
            }
        }
        return -1;
    }

    /**
     * Picks a start position for {@link Cursor#fillWindow} such that the
     * window will contain the requested row and a useful range of rows
     * around it.
     *
     * When the data set is too large to fit in a cursor window, seeking the
     * cursor can become a very expensive operation since we have to run the
     * query again when we move outside the bounds of the current window.
     *
     * We try to choose a start position for the cursor window such that
     * 1/3 of the window's capacity is used to hold rows before the requested
     * position and 2/3 of the window's capacity is used to hold rows after the
     * requested position.
     *
     * @param cursorPosition The row index of the row we want to get.
     * @param cursorWindowCapacity The estimated number of rows that can fit in
     * a cursor window, or 0 if unknown.
     * @return The recommended start position, always less than or equal to
     * the requested row.
     * @hide
     */
    public static int cursorPickFillWindowStartPosition(
            int cursorPosition, int cursorWindowCapacity) {
        return Math.max(cursorPosition - cursorWindowCapacity / 3, 0);
    }

    /**
     * Returns data type of the given object's value.
     *<p>
     * Returned values are
     * <ul>
     *   <li>{@link Cursor#FIELD_TYPE_NULL}</li>
     *   <li>{@link Cursor#FIELD_TYPE_INTEGER}</li>
     *   <li>{@link Cursor#FIELD_TYPE_FLOAT}</li>
     *   <li>{@link Cursor#FIELD_TYPE_STRING}</li>
     *   <li>{@link Cursor#FIELD_TYPE_BLOB}</li>
     *</ul>
     *</p>
     *
     * @param obj the object whose value type is to be returned
     * @return object value type
     */
    public static int getTypeOfObject(Object obj) {
        if (obj == null) {
            return Cursor.FIELD_TYPE_NULL;
        } else if (obj instanceof byte[]) {
            return Cursor.FIELD_TYPE_BLOB;
        } else if (obj instanceof Float || obj instanceof Double) {
            return Cursor.FIELD_TYPE_FLOAT;
        } else if (obj instanceof Long || obj instanceof Integer
                || obj instanceof Short || obj instanceof Byte) {
            return Cursor.FIELD_TYPE_INTEGER;
        } else {
            return Cursor.FIELD_TYPE_STRING;
        }
    }

    /**
     * Utility method to run the query on the db and return the value in the
     * first column of the first row.
     */
    public static long longForQuery(
        SQLiteDatabase db, String query, String[] selectionArgs
    ) {
        SQLiteStatement prog = db.compileStatement(query);
        try {
            return longForQuery(prog, selectionArgs);
        } finally {
            prog.close();
        }
    }

    /**
     * Utility method to run the pre-compiled query and return the value in the
     * first column of the first row.
     */
    public static long longForQuery(
        SQLiteStatement prog, String[] selectionArgs
    ) {
        prog.bindAllArgsAsStrings(selectionArgs);
        return prog.simpleQueryForLong();
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteAbortException.java.





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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that the SQLite program was aborted.
 * This can happen either through a call to ABORT in a trigger,
 * or as the result of using the ABORT conflict clause.
 */
public class SQLiteAbortException extends SQLiteException {
    public SQLiteAbortException() {}

    public SQLiteAbortException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteAccessPermException.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * This exception class is used when sqlite can't access the database file
 * due to lack of permissions on the file.
 */
public class SQLiteAccessPermException extends SQLiteException {
    public SQLiteAccessPermException() {}

    public SQLiteAccessPermException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteBindOrColumnIndexOutOfRangeException.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * Thrown if the the bind or column parameter index is out of range
 */
public class SQLiteBindOrColumnIndexOutOfRangeException extends SQLiteException {
    public SQLiteBindOrColumnIndexOutOfRangeException() {}

    public SQLiteBindOrColumnIndexOutOfRangeException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteBlobTooBigException.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

public class SQLiteBlobTooBigException extends SQLiteException {
    public SQLiteBlobTooBigException() {}

    public SQLiteBlobTooBigException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteCantOpenDatabaseException.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

public class SQLiteCantOpenDatabaseException extends SQLiteException {
    public SQLiteCantOpenDatabaseException() {}

    public SQLiteCantOpenDatabaseException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteClosable.java.





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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import java.io.Closeable;

/**
 * An object created from a SQLiteDatabase that can be closed.
 *
 * This class implements a primitive reference counting scheme for database objects.
 */
public abstract class SQLiteClosable implements Closeable {
    private int mReferenceCount = 1;

    /**
     * Called when the last reference to the object was released by
     * a call to {@link #releaseReference()} or {@link #close()}.
     */
    protected abstract void onAllReferencesReleased();

    /**
     * Called when the last reference to the object was released by
     * a call to {@link #releaseReferenceFromContainer()}.
     *
     * @deprecated Do not use.
     */
    @Deprecated
    protected void onAllReferencesReleasedFromContainer() {
        onAllReferencesReleased();
    }

    /**
     * Acquires a reference to the object.
     *
     * @throws IllegalStateException if the last reference to the object has already
     * been released.
     */
    public void acquireReference() {
        synchronized(this) {
            if (mReferenceCount <= 0) {
                throw new IllegalStateException(
                        "attempt to re-open an already-closed object: " + this);
            }
            mReferenceCount++;
        }
    }

    /**
     * Releases a reference to the object, closing the object if the last reference
     * was released.
     *
     * @see #onAllReferencesReleased()
     */
    public void releaseReference() {
        boolean refCountIsZero = false;
        synchronized(this) {
            refCountIsZero = --mReferenceCount == 0;
        }
        if (refCountIsZero) {
            onAllReferencesReleased();
        }
    }

    /**
     * Releases a reference to the object that was owned by the container of the object,
     * closing the object if the last reference was released.
     *
     * @see #onAllReferencesReleasedFromContainer()
     * @deprecated Do not use.
     */
    @Deprecated
    public void releaseReferenceFromContainer() {
        boolean refCountIsZero = false;
        synchronized(this) {
            refCountIsZero = --mReferenceCount == 0;
        }
        if (refCountIsZero) {
            onAllReferencesReleasedFromContainer();
        }
    }

    /**
     * Releases a reference to the object, closing the object if the last reference
     * was released.
     *
     * Calling this method is equivalent to calling {@link #releaseReference}.
     *
     * @see #releaseReference()
     * @see #onAllReferencesReleased()
     */
    public void close() {
        releaseReference();
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteConnection.java.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/* import dalvik.system.BlockGuard; */
import dalvik.system.CloseGuard;

import android.database.Cursor;
import android.database.CursorWindow;
import android.database.DatabaseUtils;
import org.sqlite.database.ExtraUtils;
import org.sqlite.database.sqlite.SQLiteDebug.DbStats;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.os.ParcelFileDescriptor;
import android.util.Log;
import android.util.LruCache;
import android.util.Printer;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Map;
import java.util.regex.Pattern;

/**
 * Represents a SQLite database connection.
 * Each connection wraps an instance of a native <code>sqlite3</code> object.
 * <p>
 * When database connection pooling is enabled, there can be multiple active
 * connections to the same database.  Otherwise there is typically only one
 * connection per database.
 * </p><p>
 * When the SQLite WAL feature is enabled, multiple readers and one writer
 * can concurrently access the database.  Without WAL, readers and writers
 * are mutually exclusive.
 * </p>
 *
 * <h2>Ownership and concurrency guarantees</h2>
 * <p>
 * Connection objects are not thread-safe.  They are acquired as needed to
 * perform a database operation and are then returned to the pool.  At any
 * given time, a connection is either owned and used by a {@link SQLiteSession}
 * object or the {@link SQLiteConnectionPool}.  Those classes are
 * responsible for serializing operations to guard against concurrent
 * use of a connection.
 * </p><p>
 * The guarantee of having a single owner allows this class to be implemented
 * without locks and greatly simplifies resource management.
 * </p>
 *
 * <h2>Encapsulation guarantees</h2>
 * <p>
 * The connection object object owns *all* of the SQLite related native
 * objects that are associated with the connection.  What's more, there are
 * no other objects in the system that are capable of obtaining handles to
 * those native objects.  Consequently, when the connection is closed, we do
 * not have to worry about what other components might have references to
 * its associated SQLite state -- there are none.
 * </p><p>
 * Encapsulation is what ensures that the connection object's
 * lifecycle does not become a tortured mess of finalizers and reference
 * queues.
 * </p>
 *
 * <h2>Reentrance</h2>
 * <p>
 * This class must tolerate reentrant execution of SQLite operations because
 * triggers may call custom SQLite functions that perform additional queries.
 * </p>
 *
 * @hide
 */
public final class SQLiteConnection implements CancellationSignal.OnCancelListener {
    private static final String TAG = "SQLiteConnection";
    private static final boolean DEBUG = false;

    private static final String[] EMPTY_STRING_ARRAY = new String[0];
    private static final byte[] EMPTY_BYTE_ARRAY = new byte[0];

    private static final Pattern TRIM_SQL_PATTERN = Pattern.compile("[\\s]*\\n+[\\s]*");

    private final CloseGuard mCloseGuard = CloseGuard.get();

    private final SQLiteConnectionPool mPool;
    private final SQLiteDatabaseConfiguration mConfiguration;
    private final int mConnectionId;
    private final boolean mIsPrimaryConnection;
    private final boolean mIsReadOnlyConnection;
    private final PreparedStatementCache mPreparedStatementCache;
    private PreparedStatement mPreparedStatementPool;

    // The recent operations log.
    private final OperationLog mRecentOperations = new OperationLog();

    // The native SQLiteConnection pointer.  (FOR INTERNAL USE ONLY)
    private int mConnectionPtr;

    private boolean mOnlyAllowReadOnlyOperations;

    // The number of times attachCancellationSignal has been called.
    // Because SQLite statement execution can be reentrant, we keep track of how many
    // times we have attempted to attach a cancellation signal to the connection so that
    // we can ensure that we detach the signal at the right time.
    private int mCancellationSignalAttachCount;

    private static native int nativeOpen(String path, int openFlags, String label,
            boolean enableTrace, boolean enableProfile);
    private static native void nativeClose(int connectionPtr);
    private static native void nativeRegisterCustomFunction(int connectionPtr,
            SQLiteCustomFunction function);
    private static native void nativeRegisterLocalizedCollators(int connectionPtr, String locale);
    private static native int nativePrepareStatement(int connectionPtr, String sql);
    private static native void nativeFinalizeStatement(int connectionPtr, int statementPtr);
    private static native int nativeGetParameterCount(int connectionPtr, int statementPtr);
    private static native boolean nativeIsReadOnly(int connectionPtr, int statementPtr);
    private static native int nativeGetColumnCount(int connectionPtr, int statementPtr);
    private static native String nativeGetColumnName(int connectionPtr, int statementPtr,
            int index);
    private static native void nativeBindNull(int connectionPtr, int statementPtr,
            int index);
    private static native void nativeBindLong(int connectionPtr, int statementPtr,
            int index, long value);
    private static native void nativeBindDouble(int connectionPtr, int statementPtr,
            int index, double value);
    private static native void nativeBindString(int connectionPtr, int statementPtr,
            int index, String value);
    private static native void nativeBindBlob(int connectionPtr, int statementPtr,
            int index, byte[] value);
    private static native void nativeResetStatementAndClearBindings(
            int connectionPtr, int statementPtr);
    private static native void nativeExecute(int connectionPtr, int statementPtr);
    private static native long nativeExecuteForLong(int connectionPtr, int statementPtr);
    private static native String nativeExecuteForString(int connectionPtr, int statementPtr);
    private static native int nativeExecuteForBlobFileDescriptor(
            int connectionPtr, int statementPtr);
    private static native int nativeExecuteForChangedRowCount(int connectionPtr, int statementPtr);
    private static native long nativeExecuteForLastInsertedRowId(
            int connectionPtr, int statementPtr);
    private static native long nativeExecuteForCursorWindow(
            int connectionPtr, int statementPtr, CursorWindow win,
            int startPos, int requiredPos, boolean countAllRows);
    private static native int nativeGetDbLookaside(int connectionPtr);
    private static native void nativeCancel(int connectionPtr);
    private static native void nativeResetCancel(int connectionPtr, boolean cancelable);

    private static native boolean nativeHasCodec();
    public static boolean hasCodec(){ return nativeHasCodec(); }

    private SQLiteConnection(SQLiteConnectionPool pool,
            SQLiteDatabaseConfiguration configuration,
            int connectionId, boolean primaryConnection) {
        mPool = pool;
        mConfiguration = new SQLiteDatabaseConfiguration(configuration);
        mConnectionId = connectionId;
        mIsPrimaryConnection = primaryConnection;
        mIsReadOnlyConnection = (configuration.openFlags & SQLiteDatabase.OPEN_READONLY) != 0;
        mPreparedStatementCache = new PreparedStatementCache(
                mConfiguration.maxSqlCacheSize);
        mCloseGuard.open("close");
    }

    @Override
    protected void finalize() throws Throwable {
        try {
            if (mPool != null && mConnectionPtr != 0) {
                mPool.onConnectionLeaked();
            }

            dispose(true);
        } finally {
            super.finalize();
        }
    }

    // Called by SQLiteConnectionPool only.
    static SQLiteConnection open(SQLiteConnectionPool pool,
            SQLiteDatabaseConfiguration configuration,
            int connectionId, boolean primaryConnection) {
        SQLiteConnection connection = new SQLiteConnection(pool, configuration,
                connectionId, primaryConnection);
        try {
            connection.open();
            return connection;
        } catch (SQLiteException ex) {
            connection.dispose(false);
            throw ex;
        }
    }

    // Called by SQLiteConnectionPool only.
    // Closes the database closes and releases all of its associated resources.
    // Do not call methods on the connection after it is closed.  It will probably crash.
    void close() {
        dispose(false);
    }

    private void open() {
        mConnectionPtr = nativeOpen(mConfiguration.path, mConfiguration.openFlags,
                mConfiguration.label,
                SQLiteDebug.DEBUG_SQL_STATEMENTS, SQLiteDebug.DEBUG_SQL_TIME);

        setPageSize();
        setForeignKeyModeFromConfiguration();
        setJournalSizeLimit();
	setAutoCheckpointInterval();
	if( !nativeHasCodec() ){
	  setWalModeFromConfiguration();
          setLocaleFromConfiguration();
	}

        // Register custom functions.
        final int functionCount = mConfiguration.customFunctions.size();
        for (int i = 0; i < functionCount; i++) {
            SQLiteCustomFunction function = mConfiguration.customFunctions.get(i);
            nativeRegisterCustomFunction(mConnectionPtr, function);
        }
    }

    private void dispose(boolean finalized) {
        if (mCloseGuard != null) {
            if (finalized) {
                mCloseGuard.warnIfOpen();
            }
            mCloseGuard.close();
        }

        if (mConnectionPtr != 0) {
            final int cookie = mRecentOperations.beginOperation("close", null, null);
            try {
                mPreparedStatementCache.evictAll();
                nativeClose(mConnectionPtr);
                mConnectionPtr = 0;
            } finally {
                mRecentOperations.endOperation(cookie);
            }
        }
    }

    private void setPageSize() {
        if (!mConfiguration.isInMemoryDb() && !mIsReadOnlyConnection) {
            final long newValue = SQLiteGlobal.getDefaultPageSize();
            long value = executeForLong("PRAGMA page_size", null, null);
            if (value != newValue) {
                execute("PRAGMA page_size=" + newValue, null, null);
            }
        }
    }

    private void setAutoCheckpointInterval() {
        if (!mConfiguration.isInMemoryDb() && !mIsReadOnlyConnection) {
            final long newValue = SQLiteGlobal.getWALAutoCheckpoint();
            long value = executeForLong("PRAGMA wal_autocheckpoint", null, null);
            if (value != newValue) {
                executeForLong("PRAGMA wal_autocheckpoint=" + newValue, null, null);
            }
        }
    }

    private void setJournalSizeLimit() {
        if (!mConfiguration.isInMemoryDb() && !mIsReadOnlyConnection) {
            final long newValue = SQLiteGlobal.getJournalSizeLimit();
            long value = executeForLong("PRAGMA journal_size_limit", null, null);
            if (value != newValue) {
                executeForLong("PRAGMA journal_size_limit=" + newValue, null, null);
            }
        }
    }

    private void setForeignKeyModeFromConfiguration() {
        if (!mIsReadOnlyConnection) {
            final long newValue = mConfiguration.foreignKeyConstraintsEnabled ? 1 : 0;
            long value = executeForLong("PRAGMA foreign_keys", null, null);
            if (value != newValue) {
                execute("PRAGMA foreign_keys=" + newValue, null, null);
            }
        }
    }

    private void setWalModeFromConfiguration() {
        if (!mConfiguration.isInMemoryDb() && !mIsReadOnlyConnection) {
            if ((mConfiguration.openFlags & SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING) != 0) {
                setJournalMode("WAL");
                setSyncMode(SQLiteGlobal.getWALSyncMode());
            } else {
                setJournalMode(SQLiteGlobal.getDefaultJournalMode());
                setSyncMode(SQLiteGlobal.getDefaultSyncMode());
            }
        }
    }

    private void setSyncMode(String newValue) {
        String value = executeForString("PRAGMA synchronous", null, null);
        if (!canonicalizeSyncMode(value).equalsIgnoreCase(
                canonicalizeSyncMode(newValue))) {
            execute("PRAGMA synchronous=" + newValue, null, null);
        }
    }

    private static String canonicalizeSyncMode(String value) {
        if (value.equals("0")) {
            return "OFF";
        } else if (value.equals("1")) {
            return "NORMAL";
        } else if (value.equals("2")) {
            return "FULL";
        }
        return value;
    }

    private void setJournalMode(String newValue) {
        String value = executeForString("PRAGMA journal_mode", null, null);
        if (!value.equalsIgnoreCase(newValue)) {
            try {
                String result = executeForString("PRAGMA journal_mode=" + newValue, null, null);
                if (result.equalsIgnoreCase(newValue)) {
                    return;
                }
                // PRAGMA journal_mode silently fails and returns the original journal
                // mode in some cases if the journal mode could not be changed.
            } catch (SQLiteDatabaseLockedException ex) {
                // This error (SQLITE_BUSY) occurs if one connection has the database
                // open in WAL mode and another tries to change it to non-WAL.
            }
            // Because we always disable WAL mode when a database is first opened
            // (even if we intend to re-enable it), we can encounter problems if
            // there is another open connection to the database somewhere.
            // This can happen for a variety of reasons such as an application opening
            // the same database in multiple processes at the same time or if there is a
            // crashing content provider service that the ActivityManager has
            // removed from its registry but whose process hasn't quite died yet
            // by the time it is restarted in a new process.
            //
            // If we don't change the journal mode, nothing really bad happens.
            // In the worst case, an application that enables WAL might not actually
            // get it, although it can still use connection pooling.
            Log.w(TAG, "Could not change the database journal mode of '"
                    + mConfiguration.label + "' from '" + value + "' to '" + newValue
                    + "' because the database is locked.  This usually means that "
                    + "there are other open connections to the database which prevents "
                    + "the database from enabling or disabling write-ahead logging mode.  "
                    + "Proceeding without changing the journal mode.");
        }
    }

    private void setLocaleFromConfiguration() {
        if ((mConfiguration.openFlags & SQLiteDatabase.NO_LOCALIZED_COLLATORS) != 0) {
            return;
        }

        // Register the localized collators.
        final String newLocale = mConfiguration.locale.toString();
        nativeRegisterLocalizedCollators(mConnectionPtr, newLocale);

        // If the database is read-only, we cannot modify the android metadata table
        // or existing indexes.
        if (mIsReadOnlyConnection) {
            return;
        }

        try {
            // Ensure the android metadata table exists.
            execute("CREATE TABLE IF NOT EXISTS android_metadata (locale TEXT)", null, null);

            // Check whether the locale was actually changed.
            final String oldLocale = executeForString("SELECT locale FROM android_metadata "
                    + "UNION SELECT NULL ORDER BY locale DESC LIMIT 1", null, null);
            if (oldLocale != null && oldLocale.equals(newLocale)) {
                return;
            }

            // Go ahead and update the indexes using the new locale.
            execute("BEGIN", null, null);
            boolean success = false;
            try {
                execute("DELETE FROM android_metadata", null, null);
                execute("INSERT INTO android_metadata (locale) VALUES(?)",
                        new Object[] { newLocale }, null);
                execute("REINDEX LOCALIZED", null, null);
                success = true;
            } finally {
                execute(success ? "COMMIT" : "ROLLBACK", null, null);
            }
        } catch (RuntimeException ex) {
            throw new SQLiteException("Failed to change locale for db '" + mConfiguration.label
                    + "' to '" + newLocale + "'.", ex);
        }
    }

    public void enableLocalizedCollators(){
      if( nativeHasCodec() ){
	setLocaleFromConfiguration();
      }
    }

    // Called by SQLiteConnectionPool only.
    void reconfigure(SQLiteDatabaseConfiguration configuration) {
        mOnlyAllowReadOnlyOperations = false;

        // Register custom functions.
        final int functionCount = configuration.customFunctions.size();
        for (int i = 0; i < functionCount; i++) {
            SQLiteCustomFunction function = configuration.customFunctions.get(i);
            if (!mConfiguration.customFunctions.contains(function)) {
                nativeRegisterCustomFunction(mConnectionPtr, function);
            }
        }

        // Remember what changed.
        boolean foreignKeyModeChanged = configuration.foreignKeyConstraintsEnabled
                != mConfiguration.foreignKeyConstraintsEnabled;
        boolean walModeChanged = ((configuration.openFlags ^ mConfiguration.openFlags)
                & SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING) != 0;
        boolean localeChanged = !configuration.locale.equals(mConfiguration.locale);

        // Update configuration parameters.
        mConfiguration.updateParametersFrom(configuration);

        // Update prepared statement cache size.
        /* mPreparedStatementCache.resize(configuration.maxSqlCacheSize); */

        // Update foreign key mode.
        if (foreignKeyModeChanged) {
            setForeignKeyModeFromConfiguration();
        }

        // Update WAL.
        if (walModeChanged) {
            setWalModeFromConfiguration();
        }

        // Update locale.
        if (localeChanged) {
            setLocaleFromConfiguration();
        }
    }

    // Called by SQLiteConnectionPool only.
    // When set to true, executing write operations will throw SQLiteException.
    // Preparing statements that might write is ok, just don't execute them.
    void setOnlyAllowReadOnlyOperations(boolean readOnly) {
        mOnlyAllowReadOnlyOperations = readOnly;
    }

    // Called by SQLiteConnectionPool only.
    // Returns true if the prepared statement cache contains the specified SQL.
    boolean isPreparedStatementInCache(String sql) {
        return mPreparedStatementCache.get(sql) != null;
    }

    /**
     * Gets the unique id of this connection.
     * @return The connection id.
     */
    public int getConnectionId() {
        return mConnectionId;
    }

    /**
     * Returns true if this is the primary database connection.
     * @return True if this is the primary database connection.
     */
    public boolean isPrimaryConnection() {
        return mIsPrimaryConnection;
    }

    /**
     * Prepares a statement for execution but does not bind its parameters or execute it.
     * <p>
     * This method can be used to check for syntax errors during compilation
     * prior to execution of the statement.  If the {@code outStatementInfo} argument
     * is not null, the provided {@link SQLiteStatementInfo} object is populated
     * with information about the statement.
     * </p><p>
     * A prepared statement makes no reference to the arguments that may eventually
     * be bound to it, consequently it it possible to cache certain prepared statements
     * such as SELECT or INSERT/UPDATE statements.  If the statement is cacheable,
     * then it will be stored in the cache for later.
     * </p><p>
     * To take advantage of this behavior as an optimization, the connection pool
     * provides a method to acquire a connection that already has a given SQL statement
     * in its prepared statement cache so that it is ready for execution.
     * </p>
     *
     * @param sql The SQL statement to prepare.
     * @param outStatementInfo The {@link SQLiteStatementInfo} object to populate
     * with information about the statement, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error.
     */
    public void prepare(String sql, SQLiteStatementInfo outStatementInfo) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("prepare", sql, null);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                if (outStatementInfo != null) {
                    outStatementInfo.numParameters = statement.mNumParameters;
                    outStatementInfo.readOnly = statement.mReadOnly;

                    final int columnCount = nativeGetColumnCount(
                            mConnectionPtr, statement.mStatementPtr);
                    if (columnCount == 0) {
                        outStatementInfo.columnNames = EMPTY_STRING_ARRAY;
                    } else {
                        outStatementInfo.columnNames = new String[columnCount];
                        for (int i = 0; i < columnCount; i++) {
                            outStatementInfo.columnNames[i] = nativeGetColumnName(
                                    mConnectionPtr, statement.mStatementPtr, i);
                        }
                    }
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that does not return a result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public void execute(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("execute", sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    nativeExecute(mConnectionPtr, statement.mStatementPtr);
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that returns a single <code>long</code> result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The value of the first column in the first row of the result set
     * as a <code>long</code>, or zero if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public long executeForLong(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("executeForLong", sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    return nativeExecuteForLong(mConnectionPtr, statement.mStatementPtr);
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that returns a single {@link String} result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The value of the first column in the first row of the result set
     * as a <code>String</code>, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public String executeForString(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("executeForString", sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    return nativeExecuteForString(mConnectionPtr, statement.mStatementPtr);
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that returns a single BLOB result as a
     * file descriptor to a shared memory region.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The file descriptor for a shared memory region that contains
     * the value of the first column in the first row of the result set as a BLOB,
     * or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public ParcelFileDescriptor executeForBlobFileDescriptor(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("executeForBlobFileDescriptor",
                sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    int fd = nativeExecuteForBlobFileDescriptor(
                            mConnectionPtr, statement.mStatementPtr);
                    return fd >= 0 ? ParcelFileDescriptor.adoptFd(fd) : null;
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement that returns a count of the number of rows
     * that were changed.  Use for UPDATE or DELETE SQL statements.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The number of rows that were changed.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public int executeForChangedRowCount(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        int changedRows = 0;
        final int cookie = mRecentOperations.beginOperation("executeForChangedRowCount",
                sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    changedRows = nativeExecuteForChangedRowCount(
                            mConnectionPtr, statement.mStatementPtr);
                    return changedRows;
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            if (mRecentOperations.endOperationDeferLog(cookie)) {
                mRecentOperations.logOperation(cookie, "changedRows=" + changedRows);
            }
        }
    }

    /**
     * Executes a statement that returns the row id of the last row inserted
     * by the statement.  Use for INSERT SQL statements.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The row id of the last row that was inserted, or 0 if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public long executeForLastInsertedRowId(String sql, Object[] bindArgs,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        final int cookie = mRecentOperations.beginOperation("executeForLastInsertedRowId",
                sql, bindArgs);
        try {
            final PreparedStatement statement = acquirePreparedStatement(sql);
            try {
                throwIfStatementForbidden(statement);
                bindArguments(statement, bindArgs);
                applyBlockGuardPolicy(statement);
                attachCancellationSignal(cancellationSignal);
                try {
                    return nativeExecuteForLastInsertedRowId(
                            mConnectionPtr, statement.mStatementPtr);
                } finally {
                    detachCancellationSignal(cancellationSignal);
                }
            } finally {
                releasePreparedStatement(statement);
            }
        } catch (RuntimeException ex) {
            mRecentOperations.failOperation(cookie, ex);
            throw ex;
        } finally {
            mRecentOperations.endOperation(cookie);
        }
    }

    /**
     * Executes a statement and populates the specified {@link CursorWindow}
     * with a range of results.  Returns the number of rows that were counted
     * during query execution.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param window The cursor window to clear and fill.
     * @param startPos The start position for filling the window.
     * @param requiredPos The position of a row that MUST be in the window.
     * If it won't fit, then the query should discard part of what it filled
     * so that it does.  Must be greater than or equal to <code>startPos</code>.
     * @param countAllRows True to count all rows that the query would return
     * regagless of whether they fit in the window.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The number of rows that were counted during query execution.  Might
     * not be all rows in the result set unless <code>countAllRows</code> is true.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public int executeForCursorWindow(String sql, Object[] bindArgs,
            CursorWindow window, int startPos, int requiredPos, boolean countAllRows,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }
        if (window == null) {
            throw new IllegalArgumentException("window must not be null.");
        }

        window.acquireReference();
        try {
            int actualPos = -1;
            int countedRows = -1;
            int filledRows = -1;
            final int cookie = mRecentOperations.beginOperation("executeForCursorWindow",
                    sql, bindArgs);
            try {
                final PreparedStatement statement = acquirePreparedStatement(sql);
                try {
                    throwIfStatementForbidden(statement);
                    bindArguments(statement, bindArgs);
                    applyBlockGuardPolicy(statement);
                    attachCancellationSignal(cancellationSignal);
                    try {
                        final long result = nativeExecuteForCursorWindow(
                                mConnectionPtr, statement.mStatementPtr, window,
                                startPos, requiredPos, countAllRows);
                        actualPos = (int)(result >> 32);
                        countedRows = (int)result;
                        filledRows = window.getNumRows();
                        window.setStartPosition(actualPos);
                        return countedRows;
                    } finally {
                        detachCancellationSignal(cancellationSignal);
                    }
                } finally {
                    releasePreparedStatement(statement);
                }
            } catch (RuntimeException ex) {
                mRecentOperations.failOperation(cookie, ex);
                throw ex;
            } finally {
                if (mRecentOperations.endOperationDeferLog(cookie)) {
                    mRecentOperations.logOperation(cookie, "window='" + window
                            + "', startPos=" + startPos
                            + ", actualPos=" + actualPos
                            + ", filledRows=" + filledRows
                            + ", countedRows=" + countedRows);
                }
            }
        } finally {
            window.releaseReference();
        }
    }

    private PreparedStatement acquirePreparedStatement(String sql) {
        PreparedStatement statement = mPreparedStatementCache.get(sql);
        boolean skipCache = false;
        if (statement != null) {
            if (!statement.mInUse) {
                return statement;
            }
            // The statement is already in the cache but is in use (this statement appears
            // to be not only re-entrant but recursive!).  So prepare a new copy of the
            // statement but do not cache it.
            skipCache = true;
        }

        final int statementPtr = nativePrepareStatement(mConnectionPtr, sql);
        try {
            final int numParameters = nativeGetParameterCount(mConnectionPtr, statementPtr);
            final int type = DatabaseUtils.getSqlStatementType(sql);
            final boolean readOnly = nativeIsReadOnly(mConnectionPtr, statementPtr);
            statement = obtainPreparedStatement(sql, statementPtr, numParameters, type, readOnly);
            if (!skipCache && isCacheable(type)) {
                mPreparedStatementCache.put(sql, statement);
                statement.mInCache = true;
            }
        } catch (RuntimeException ex) {
            // Finalize the statement if an exception occurred and we did not add
            // it to the cache.  If it is already in the cache, then leave it there.
            if (statement == null || !statement.mInCache) {
                nativeFinalizeStatement(mConnectionPtr, statementPtr);
            }
            throw ex;
        }
        statement.mInUse = true;
        return statement;
    }

    private void releasePreparedStatement(PreparedStatement statement) {
        statement.mInUse = false;
        if (statement.mInCache) {
            try {
                nativeResetStatementAndClearBindings(mConnectionPtr, statement.mStatementPtr);
            } catch (SQLiteException ex) {
                // The statement could not be reset due to an error.  Remove it from the cache.
                // When remove() is called, the cache will invoke its entryRemoved() callback,
                // which will in turn call finalizePreparedStatement() to finalize and
                // recycle the statement.
                if (DEBUG) {
                    Log.d(TAG, "Could not reset prepared statement due to an exception.  "
                            + "Removing it from the cache.  SQL: "
                            + trimSqlForDisplay(statement.mSql), ex);
                }

                mPreparedStatementCache.remove(statement.mSql);
            }
        } else {
            finalizePreparedStatement(statement);
        }
    }

    private void finalizePreparedStatement(PreparedStatement statement) {
        nativeFinalizeStatement(mConnectionPtr, statement.mStatementPtr);
        recyclePreparedStatement(statement);
    }

    private void attachCancellationSignal(CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();

            mCancellationSignalAttachCount += 1;
            if (mCancellationSignalAttachCount == 1) {
                // Reset cancellation flag before executing the statement.
                nativeResetCancel(mConnectionPtr, true /*cancelable*/);

                // After this point, onCancel() may be called concurrently.
                cancellationSignal.setOnCancelListener(this);
            }
        }
    }

    private void detachCancellationSignal(CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            assert mCancellationSignalAttachCount > 0;

            mCancellationSignalAttachCount -= 1;
            if (mCancellationSignalAttachCount == 0) {
                // After this point, onCancel() cannot be called concurrently.
                cancellationSignal.setOnCancelListener(null);

                // Reset cancellation flag after executing the statement.
                nativeResetCancel(mConnectionPtr, false /*cancelable*/);
            }
        }
    }

    // CancellationSignal.OnCancelListener callback.
    // This method may be called on a different thread than the executing statement.
    // However, it will only be called between calls to attachCancellationSignal and
    // detachCancellationSignal, while a statement is executing.  We can safely assume
    // that the SQLite connection is still alive.
    @Override
    public void onCancel() {
        nativeCancel(mConnectionPtr);
    }

    private void bindArguments(PreparedStatement statement, Object[] bindArgs) {
        final int count = bindArgs != null ? bindArgs.length : 0;
        if (count != statement.mNumParameters) {
            throw new SQLiteBindOrColumnIndexOutOfRangeException(
                    "Expected " + statement.mNumParameters + " bind arguments but "
                    + count + " were provided.");
        }
        if (count == 0) {
            return;
        }

        final int statementPtr = statement.mStatementPtr;
        for (int i = 0; i < count; i++) {
            final Object arg = bindArgs[i];
            switch (ExtraUtils.getTypeOfObject(arg)) {
                case Cursor.FIELD_TYPE_NULL:
                    nativeBindNull(mConnectionPtr, statementPtr, i + 1);
                    break;
                case Cursor.FIELD_TYPE_INTEGER:
                    nativeBindLong(mConnectionPtr, statementPtr, i + 1,
                            ((Number)arg).longValue());
                    break;
                case Cursor.FIELD_TYPE_FLOAT:
                    nativeBindDouble(mConnectionPtr, statementPtr, i + 1,
                            ((Number)arg).doubleValue());
                    break;
                case Cursor.FIELD_TYPE_BLOB:
                    nativeBindBlob(mConnectionPtr, statementPtr, i + 1, (byte[])arg);
                    break;
                case Cursor.FIELD_TYPE_STRING:
                default:
                    if (arg instanceof Boolean) {
                        // Provide compatibility with legacy applications which may pass
                        // Boolean values in bind args.
                        nativeBindLong(mConnectionPtr, statementPtr, i + 1,
                                ((Boolean)arg).booleanValue() ? 1 : 0);
                    } else {
                        nativeBindString(mConnectionPtr, statementPtr, i + 1, arg.toString());
                    }
                    break;
            }
        }
    }

    private void throwIfStatementForbidden(PreparedStatement statement) {
        if (mOnlyAllowReadOnlyOperations && !statement.mReadOnly) {
            throw new SQLiteException("Cannot execute this statement because it "
                    + "might modify the database but the connection is read-only.");
        }
    }

    private static boolean isCacheable(int statementType) {
        if (statementType == DatabaseUtils.STATEMENT_UPDATE
                || statementType == DatabaseUtils.STATEMENT_SELECT) {
            return true;
        }
        return false;
    }

    private void applyBlockGuardPolicy(PreparedStatement statement) {
/*        if (!mConfiguration.isInMemoryDb()) {*/
/*            if (statement.mReadOnly) {*/
/*                BlockGuard.getThreadPolicy().onReadFromDisk();*/
/*            } else {*/
/*                BlockGuard.getThreadPolicy().onWriteToDisk();*/
/*            }*/
/*        }*/
    }

    /**
     * Dumps debugging information about this connection.
     *
     * @param printer The printer to receive the dump, not null.
     * @param verbose True to dump more verbose information.
     */
    public void dump(Printer printer, boolean verbose) {
        dumpUnsafe(printer, verbose);
    }

    /**
     * Dumps debugging information about this connection, in the case where the
     * caller might not actually own the connection.
     *
     * This function is written so that it may be called by a thread that does not
     * own the connection.  We need to be very careful because the connection state is
     * not synchronized.
     *
     * At worst, the method may return stale or slightly wrong data, however
     * it should not crash.  This is ok as it is only used for diagnostic purposes.
     *
     * @param printer The printer to receive the dump, not null.
     * @param verbose True to dump more verbose information.
     */
    void dumpUnsafe(Printer printer, boolean verbose) {
        printer.println("Connection #" + mConnectionId + ":");
        if (verbose) {
            printer.println("  connectionPtr: 0x" + Integer.toHexString(mConnectionPtr));
        }
        printer.println("  isPrimaryConnection: " + mIsPrimaryConnection);
        printer.println("  onlyAllowReadOnlyOperations: " + mOnlyAllowReadOnlyOperations);

        mRecentOperations.dump(printer, verbose);

        if (verbose) {
            mPreparedStatementCache.dump(printer);
        }
    }

    /**
     * Describes the currently executing operation, in the case where the
     * caller might not actually own the connection.
     *
     * This function is written so that it may be called by a thread that does not
     * own the connection.  We need to be very careful because the connection state is
     * not synchronized.
     *
     * At worst, the method may return stale or slightly wrong data, however
     * it should not crash.  This is ok as it is only used for diagnostic purposes.
     *
     * @return A description of the current operation including how long it has been running,
     * or null if none.
     */
    String describeCurrentOperationUnsafe() {
        return mRecentOperations.describeCurrentOperation();
    }

    /**
     * Collects statistics about database connection memory usage.
     *
     * @param dbStatsList The list to populate.
     */
    void collectDbStats(ArrayList<DbStats> dbStatsList) {
        // Get information about the main database.
        int lookaside = nativeGetDbLookaside(mConnectionPtr);
        long pageCount = 0;
        long pageSize = 0;
        try {
            pageCount = executeForLong("PRAGMA page_count;", null, null);
            pageSize = executeForLong("PRAGMA page_size;", null, null);
        } catch (SQLiteException ex) {
            // Ignore.
        }
        dbStatsList.add(getMainDbStatsUnsafe(lookaside, pageCount, pageSize));

        // Get information about attached databases.
        // We ignore the first row in the database list because it corresponds to
        // the main database which we have already described.
        CursorWindow window = new CursorWindow("collectDbStats");
        try {
            executeForCursorWindow("PRAGMA database_list;", null, window, 0, 0, false, null);
            for (int i = 1; i < window.getNumRows(); i++) {
                String name = window.getString(i, 1);
                String path = window.getString(i, 2);
                pageCount = 0;
                pageSize = 0;
                try {
                    pageCount = executeForLong("PRAGMA " + name + ".page_count;", null, null);
                    pageSize = executeForLong("PRAGMA " + name + ".page_size;", null, null);
                } catch (SQLiteException ex) {
                    // Ignore.
                }
                String label = "  (attached) " + name;
                if (!path.isEmpty()) {
                    label += ": " + path;
                }
                dbStatsList.add(new DbStats(label, pageCount, pageSize, 0, 0, 0, 0));
            }
        } catch (SQLiteException ex) {
            // Ignore.
        } finally {
            window.close();
        }
    }

    /**
     * Collects statistics about database connection memory usage, in the case where the
     * caller might not actually own the connection.
     *
     * @return The statistics object, never null.
     */
    void collectDbStatsUnsafe(ArrayList<DbStats> dbStatsList) {
        dbStatsList.add(getMainDbStatsUnsafe(0, 0, 0));
    }

    private DbStats getMainDbStatsUnsafe(int lookaside, long pageCount, long pageSize) {
        // The prepared statement cache is thread-safe so we can access its statistics
        // even if we do not own the database connection.
        String label = mConfiguration.path;
        if (!mIsPrimaryConnection) {
            label += " (" + mConnectionId + ")";
        }
        return new DbStats(label, pageCount, pageSize, lookaside,
                mPreparedStatementCache.hitCount(),
                mPreparedStatementCache.missCount(),
                mPreparedStatementCache.size());
    }

    @Override
    public String toString() {
        return "SQLiteConnection: " + mConfiguration.path + " (" + mConnectionId + ")";
    }

    private PreparedStatement obtainPreparedStatement(String sql, int statementPtr,
            int numParameters, int type, boolean readOnly) {
        PreparedStatement statement = mPreparedStatementPool;
        if (statement != null) {
            mPreparedStatementPool = statement.mPoolNext;
            statement.mPoolNext = null;
            statement.mInCache = false;
        } else {
            statement = new PreparedStatement();
        }
        statement.mSql = sql;
        statement.mStatementPtr = statementPtr;
        statement.mNumParameters = numParameters;
        statement.mType = type;
        statement.mReadOnly = readOnly;
        return statement;
    }

    private void recyclePreparedStatement(PreparedStatement statement) {
        statement.mSql = null;
        statement.mPoolNext = mPreparedStatementPool;
        mPreparedStatementPool = statement;
    }

    private static String trimSqlForDisplay(String sql) {
        return TRIM_SQL_PATTERN.matcher(sql).replaceAll(" ");
    }

    /**
     * Holder type for a prepared statement.
     *
     * Although this object holds a pointer to a native statement object, it
     * does not have a finalizer.  This is deliberate.  The {@link SQLiteConnection}
     * owns the statement object and will take care of freeing it when needed.
     * In particular, closing the connection requires a guarantee of deterministic
     * resource disposal because all native statement objects must be freed before
     * the native database object can be closed.  So no finalizers here.
     */
    private static final class PreparedStatement {
        // Next item in pool.
        public PreparedStatement mPoolNext;

        // The SQL from which the statement was prepared.
        public String mSql;

        // The native sqlite3_stmt object pointer.
        // Lifetime is managed explicitly by the connection.
        public int mStatementPtr;

        // The number of parameters that the prepared statement has.
        public int mNumParameters;

        // The statement type.
        public int mType;

        // True if the statement is read-only.
        public boolean mReadOnly;

        // True if the statement is in the cache.
        public boolean mInCache;

        // True if the statement is in use (currently executing).
        // We need this flag because due to the use of custom functions in triggers, it's
        // possible for SQLite calls to be re-entrant.  Consequently we need to prevent
        // in use statements from being finalized until they are no longer in use.
        public boolean mInUse;
    }

    private final class PreparedStatementCache
            extends LruCache<String, PreparedStatement> {
        public PreparedStatementCache(int size) {
            super(size);
        }

        @Override
        protected void entryRemoved(boolean evicted, String key,
                PreparedStatement oldValue, PreparedStatement newValue) {
            oldValue.mInCache = false;
            if (!oldValue.mInUse) {
                finalizePreparedStatement(oldValue);
            }
        }

        public void dump(Printer printer) {
            printer.println("  Prepared statement cache:");
            Map<String, PreparedStatement> cache = snapshot();
            if (!cache.isEmpty()) {
                int i = 0;
                for (Map.Entry<String, PreparedStatement> entry : cache.entrySet()) {
                    PreparedStatement statement = entry.getValue();
                    if (statement.mInCache) { // might be false due to a race with entryRemoved
                        String sql = entry.getKey();
                        printer.println("    " + i + ": statementPtr=0x"
                                + Integer.toHexString(statement.mStatementPtr)
                                + ", numParameters=" + statement.mNumParameters
                                + ", type=" + statement.mType
                                + ", readOnly=" + statement.mReadOnly
                                + ", sql=\"" + trimSqlForDisplay(sql) + "\"");
                    }
                    i += 1;
                }
            } else {
                printer.println("    <none>");
            }
        }
    }

    private static final class OperationLog {
        private static final int MAX_RECENT_OPERATIONS = 20;
        private static final int COOKIE_GENERATION_SHIFT = 8;
        private static final int COOKIE_INDEX_MASK = 0xff;

        private final Operation[] mOperations = new Operation[MAX_RECENT_OPERATIONS];
        private int mIndex;
        private int mGeneration;

        public int beginOperation(String kind, String sql, Object[] bindArgs) {
            synchronized (mOperations) {
                final int index = (mIndex + 1) % MAX_RECENT_OPERATIONS;
                Operation operation = mOperations[index];
                if (operation == null) {
                    operation = new Operation();
                    mOperations[index] = operation;
                } else {
                    operation.mFinished = false;
                    operation.mException = null;
                    if (operation.mBindArgs != null) {
                        operation.mBindArgs.clear();
                    }
                }
                operation.mStartTime = System.currentTimeMillis();
                operation.mKind = kind;
                operation.mSql = sql;
                if (bindArgs != null) {
                    if (operation.mBindArgs == null) {
                        operation.mBindArgs = new ArrayList<Object>();
                    } else {
                        operation.mBindArgs.clear();
                    }
                    for (int i = 0; i < bindArgs.length; i++) {
                        final Object arg = bindArgs[i];
                        if (arg != null && arg instanceof byte[]) {
                            // Don't hold onto the real byte array longer than necessary.
                            operation.mBindArgs.add(EMPTY_BYTE_ARRAY);
                        } else {
                            operation.mBindArgs.add(arg);
                        }
                    }
                }
                operation.mCookie = newOperationCookieLocked(index);
                mIndex = index;
                return operation.mCookie;
            }
        }

        public void failOperation(int cookie, Exception ex) {
            synchronized (mOperations) {
                final Operation operation = getOperationLocked(cookie);
                if (operation != null) {
                    operation.mException = ex;
                }
            }
        }

        public void endOperation(int cookie) {
            synchronized (mOperations) {
                if (endOperationDeferLogLocked(cookie)) {
                    logOperationLocked(cookie, null);
                }
            }
        }

        public boolean endOperationDeferLog(int cookie) {
            synchronized (mOperations) {
                return endOperationDeferLogLocked(cookie);
            }
        }

        public void logOperation(int cookie, String detail) {
            synchronized (mOperations) {
                logOperationLocked(cookie, detail);
            }
        }

        private boolean endOperationDeferLogLocked(int cookie) {
            final Operation operation = getOperationLocked(cookie);
            if (operation != null) {
                operation.mEndTime = System.currentTimeMillis();
                operation.mFinished = true;
                return SQLiteDebug.DEBUG_LOG_SLOW_QUERIES && SQLiteDebug.shouldLogSlowQuery(
                                operation.mEndTime - operation.mStartTime);
            }
            return false;
        }

        private void logOperationLocked(int cookie, String detail) {
            final Operation operation = getOperationLocked(cookie);
            StringBuilder msg = new StringBuilder();
            operation.describe(msg, false);
            if (detail != null) {
                msg.append(", ").append(detail);
            }
            Log.d(TAG, msg.toString());
        }

        private int newOperationCookieLocked(int index) {
            final int generation = mGeneration++;
            return generation << COOKIE_GENERATION_SHIFT | index;
        }

        private Operation getOperationLocked(int cookie) {
            final int index = cookie & COOKIE_INDEX_MASK;
            final Operation operation = mOperations[index];
            return operation.mCookie == cookie ? operation : null;
        }

        public String describeCurrentOperation() {
            synchronized (mOperations) {
                final Operation operation = mOperations[mIndex];
                if (operation != null && !operation.mFinished) {
                    StringBuilder msg = new StringBuilder();
                    operation.describe(msg, false);
                    return msg.toString();
                }
                return null;
            }
        }

        public void dump(Printer printer, boolean verbose) {
            synchronized (mOperations) {
                printer.println("  Most recently executed operations:");
                int index = mIndex;
                Operation operation = mOperations[index];
                if (operation != null) {
                    int n = 0;
                    do {
                        StringBuilder msg = new StringBuilder();
                        msg.append("    ").append(n).append(": [");
                        msg.append(operation.getFormattedStartTime());
                        msg.append("] ");
                        operation.describe(msg, verbose);
                        printer.println(msg.toString());

                        if (index > 0) {
                            index -= 1;
                        } else {
                            index = MAX_RECENT_OPERATIONS - 1;
                        }
                        n += 1;
                        operation = mOperations[index];
                    } while (operation != null && n < MAX_RECENT_OPERATIONS);
                } else {
                    printer.println("    <none>");
                }
            }
        }
    }

    private static final class Operation {
        private static final SimpleDateFormat sDateFormat =
                new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");

        public long mStartTime;
        public long mEndTime;
        public String mKind;
        public String mSql;
        public ArrayList<Object> mBindArgs;
        public boolean mFinished;
        public Exception mException;
        public int mCookie;

        public void describe(StringBuilder msg, boolean verbose) {
            msg.append(mKind);
            if (mFinished) {
                msg.append(" took ").append(mEndTime - mStartTime).append("ms");
            } else {
                msg.append(" started ").append(System.currentTimeMillis() - mStartTime)
                        .append("ms ago");
            }
            msg.append(" - ").append(getStatus());
            if (mSql != null) {
                msg.append(", sql=\"").append(trimSqlForDisplay(mSql)).append("\"");
            }
            if (verbose && mBindArgs != null && mBindArgs.size() != 0) {
                msg.append(", bindArgs=[");
                final int count = mBindArgs.size();
                for (int i = 0; i < count; i++) {
                    final Object arg = mBindArgs.get(i);
                    if (i != 0) {
                        msg.append(", ");
                    }
                    if (arg == null) {
                        msg.append("null");
                    } else if (arg instanceof byte[]) {
                        msg.append("<byte[]>");
                    } else if (arg instanceof String) {
                        msg.append("\"").append((String)arg).append("\"");
                    } else {
                        msg.append(arg);
                    }
                }
                msg.append("]");
            }
            if (mException != null) {
                msg.append(", exception=\"").append(mException.getMessage()).append("\"");
            }
        }

        private String getStatus() {
            if (!mFinished) {
                return "running";
            }
            return mException != null ? "failed" : "succeeded";
        }

        private String getFormattedStartTime() {
            return sDateFormat.format(new Date(mStartTime));
        }
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteConnectionPool.java.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import dalvik.system.CloseGuard;

import org.sqlite.database.sqlite.SQLiteDebug.DbStats;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.os.SystemClock;
import android.util.Log;
/* import android.util.PrefixPrinter; */
import android.util.Printer;

import java.io.Closeable;
import java.util.ArrayList;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.LockSupport;

/**
 * Maintains a pool of active SQLite database connections.
 * <p>
 * At any given time, a connection is either owned by the pool, or it has been
 * acquired by a {@link SQLiteSession}.  When the {@link SQLiteSession} is
 * finished with the connection it is using, it must return the connection
 * back to the pool.
 * </p><p>
 * The pool holds strong references to the connections it owns.  However,
 * it only holds <em>weak references</em> to the connections that sessions
 * have acquired from it.  Using weak references in the latter case ensures
 * that the connection pool can detect when connections have been improperly
 * abandoned so that it can create new connections to replace them if needed.
 * </p><p>
 * The connection pool is thread-safe (but the connections themselves are not).
 * </p>
 *
 * <h2>Exception safety</h2>
 * <p>
 * This code attempts to maintain the invariant that opened connections are
 * always owned.  Unfortunately that means it needs to handle exceptions
 * all over to ensure that broken connections get cleaned up.  Most
 * operations invokving SQLite can throw {@link SQLiteException} or other
 * runtime exceptions.  This is a bit of a pain to deal with because the compiler
 * cannot help us catch missing exception handling code.
 * </p><p>
 * The general rule for this file: If we are making calls out to
 * {@link SQLiteConnection} then we must be prepared to handle any
 * runtime exceptions it might throw at us.  Note that out-of-memory
 * is an {@link Error}, not a {@link RuntimeException}.  We don't trouble ourselves
 * handling out of memory because it is hard to do anything at all sensible then
 * and most likely the VM is about to crash.
 * </p>
 *
 * @hide
 */
public final class SQLiteConnectionPool implements Closeable {
    private static final String TAG = "SQLiteConnectionPool";

    // Amount of time to wait in milliseconds before unblocking acquireConnection
    // and logging a message about the connection pool being busy.
    private static final long CONNECTION_POOL_BUSY_MILLIS = 30 * 1000; // 30 seconds

    private final CloseGuard mCloseGuard = CloseGuard.get();

    private final Object mLock = new Object();
    private final AtomicBoolean mConnectionLeaked = new AtomicBoolean();
    private final SQLiteDatabaseConfiguration mConfiguration;
    private int mMaxConnectionPoolSize;
    private boolean mIsOpen;
    private int mNextConnectionId;

    private ConnectionWaiter mConnectionWaiterPool;
    private ConnectionWaiter mConnectionWaiterQueue;

    // Strong references to all available connections.
    private final ArrayList<SQLiteConnection> mAvailableNonPrimaryConnections =
            new ArrayList<SQLiteConnection>();
    private SQLiteConnection mAvailablePrimaryConnection;

    // Describes what should happen to an acquired connection when it is returned to the pool.
    enum AcquiredConnectionStatus {
        // The connection should be returned to the pool as usual.
        NORMAL,

        // The connection must be reconfigured before being returned.
        RECONFIGURE,

        // The connection must be closed and discarded.
        DISCARD,
    }

    // Weak references to all acquired connections.  The associated value
    // indicates whether the connection must be reconfigured before being
    // returned to the available connection list or discarded.
    // For example, the prepared statement cache size may have changed and
    // need to be updated in preparation for the next client.
    private final WeakHashMap<SQLiteConnection, AcquiredConnectionStatus> mAcquiredConnections =
            new WeakHashMap<SQLiteConnection, AcquiredConnectionStatus>();

    /**
     * Connection flag: Read-only.
     * <p>
     * This flag indicates that the connection will only be used to
     * perform read-only operations.
     * </p>
     */
    public static final int CONNECTION_FLAG_READ_ONLY = 1 << 0;

    /**
     * Connection flag: Primary connection affinity.
     * <p>
     * This flag indicates that the primary connection is required.
     * This flag helps support legacy applications that expect most data modifying
     * operations to be serialized by locking the primary database connection.
     * Setting this flag essentially implements the old "db lock" concept by preventing
     * an operation from being performed until it can obtain exclusive access to
     * the primary connection.
     * </p>
     */
    public static final int CONNECTION_FLAG_PRIMARY_CONNECTION_AFFINITY = 1 << 1;

    /**
     * Connection flag: Connection is being used interactively.
     * <p>
     * This flag indicates that the connection is needed by the UI thread.
     * The connection pool can use this flag to elevate the priority
     * of the database connection request.
     * </p>
     */
    public static final int CONNECTION_FLAG_INTERACTIVE = 1 << 2;

    private SQLiteConnectionPool(SQLiteDatabaseConfiguration configuration) {
        mConfiguration = new SQLiteDatabaseConfiguration(configuration);
        setMaxConnectionPoolSizeLocked();
    }

    @Override
    protected void finalize() throws Throwable {
        try {
            dispose(true);
        } finally {
            super.finalize();
        }
    }

    /**
     * Opens a connection pool for the specified database.
     *
     * @param configuration The database configuration.
     * @return The connection pool.
     *
     * @throws SQLiteException if a database error occurs.
     */
    public static SQLiteConnectionPool open(SQLiteDatabaseConfiguration configuration) {
        if (configuration == null) {
            throw new IllegalArgumentException("configuration must not be null.");
        }

        // Create the pool.
        SQLiteConnectionPool pool = new SQLiteConnectionPool(configuration);
        pool.open(); // might throw
        return pool;
    }

    // Might throw
    private void open() {
        // Open the primary connection.
        // This might throw if the database is corrupt.
        mAvailablePrimaryConnection = openConnectionLocked(mConfiguration,
                true /*primaryConnection*/); // might throw

        // Mark the pool as being open for business.
        mIsOpen = true;
        mCloseGuard.open("close");
    }

    /**
     * Closes the connection pool.
     * <p>
     * When the connection pool is closed, it will refuse all further requests
     * to acquire connections.  All connections that are currently available in
     * the pool are closed immediately.  Any connections that are still in use
     * will be closed as soon as they are returned to the pool.
     * </p>
     *
     * @throws IllegalStateException if the pool has been closed.
     */
    public void close() {
        dispose(false);
    }

    private void dispose(boolean finalized) {
        if (mCloseGuard != null) {
            if (finalized) {
                mCloseGuard.warnIfOpen();
            }
            mCloseGuard.close();
        }

        if (!finalized) {
            // Close all connections.  We don't need (or want) to do this
            // when finalized because we don't know what state the connections
            // themselves will be in.  The finalizer is really just here for CloseGuard.
            // The connections will take care of themselves when their own finalizers run.
            synchronized (mLock) {
                throwIfClosedLocked();

                mIsOpen = false;

                closeAvailableConnectionsAndLogExceptionsLocked();

                final int pendingCount = mAcquiredConnections.size();
                if (pendingCount != 0) {
                    Log.i(TAG, "The connection pool for " + mConfiguration.label
                            + " has been closed but there are still "
                            + pendingCount + " connections in use.  They will be closed "
                            + "as they are released back to the pool.");
                }

                wakeConnectionWaitersLocked();
            }
        }
    }

    /**
     * Reconfigures the database configuration of the connection pool and all of its
     * connections.
     * <p>
     * Configuration changes are propagated down to connections immediately if
     * they are available or as soon as they are released.  This includes changes
     * that affect the size of the pool.
     * </p>
     *
     * @param configuration The new configuration.
     *
     * @throws IllegalStateException if the pool has been closed.
     */
    public void reconfigure(SQLiteDatabaseConfiguration configuration) {
        if (configuration == null) {
            throw new IllegalArgumentException("configuration must not be null.");
        }

        synchronized (mLock) {
            throwIfClosedLocked();

            boolean walModeChanged = ((configuration.openFlags ^ mConfiguration.openFlags)
                    & SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING) != 0;
            if (walModeChanged) {
                // WAL mode can only be changed if there are no acquired connections
                // because we need to close all but the primary connection first.
                if (!mAcquiredConnections.isEmpty()) {
                    throw new IllegalStateException("Write Ahead Logging (WAL) mode cannot "
                            + "be enabled or disabled while there are transactions in "
                            + "progress.  Finish all transactions and release all active "
                            + "database connections first.");
                }

                // Close all non-primary connections.  This should happen immediately
                // because none of them are in use.
                closeAvailableNonPrimaryConnectionsAndLogExceptionsLocked();
                assert mAvailableNonPrimaryConnections.isEmpty();
            }

            boolean foreignKeyModeChanged = configuration.foreignKeyConstraintsEnabled
                    != mConfiguration.foreignKeyConstraintsEnabled;
            if (foreignKeyModeChanged) {
                // Foreign key constraints can only be changed if there are no transactions
                // in progress.  To make this clear, we throw an exception if there are
                // any acquired connections.
                if (!mAcquiredConnections.isEmpty()) {
                    throw new IllegalStateException("Foreign Key Constraints cannot "
                            + "be enabled or disabled while there are transactions in "
                            + "progress.  Finish all transactions and release all active "
                            + "database connections first.");
                }
            }

            if (mConfiguration.openFlags != configuration.openFlags) {
                // If we are changing open flags and WAL mode at the same time, then
                // we have no choice but to close the primary connection beforehand
                // because there can only be one connection open when we change WAL mode.
                if (walModeChanged) {
                    closeAvailableConnectionsAndLogExceptionsLocked();
                }

                // Try to reopen the primary connection using the new open flags then
                // close and discard all existing connections.
                // This might throw if the database is corrupt or cannot be opened in
                // the new mode in which case existing connections will remain untouched.
                SQLiteConnection newPrimaryConnection = openConnectionLocked(configuration,
                        true /*primaryConnection*/); // might throw

                closeAvailableConnectionsAndLogExceptionsLocked();
                discardAcquiredConnectionsLocked();

                mAvailablePrimaryConnection = newPrimaryConnection;
                mConfiguration.updateParametersFrom(configuration);
                setMaxConnectionPoolSizeLocked();
            } else {
                // Reconfigure the database connections in place.
                mConfiguration.updateParametersFrom(configuration);
                setMaxConnectionPoolSizeLocked();

                closeExcessConnectionsAndLogExceptionsLocked();
                reconfigureAllConnectionsLocked();
            }

            wakeConnectionWaitersLocked();
        }
    }

    /**
     * Acquires a connection from the pool.
     * <p>
     * The caller must call {@link #releaseConnection} to release the connection
     * back to the pool when it is finished.  Failure to do so will result
     * in much unpleasantness.
     * </p>
     *
     * @param sql If not null, try to find a connection that already has
     * the specified SQL statement in its prepared statement cache.
     * @param connectionFlags The connection request flags.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The connection that was acquired, never null.
     *
     * @throws IllegalStateException if the pool has been closed.
     * @throws SQLiteException if a database error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public SQLiteConnection acquireConnection(String sql, int connectionFlags,
            CancellationSignal cancellationSignal) {
        return waitForConnection(sql, connectionFlags, cancellationSignal);
    }

    /**
     * Releases a connection back to the pool.
     * <p>
     * It is ok to call this method after the pool has closed, to release
     * connections that were still in use at the time of closure.
     * </p>
     *
     * @param connection The connection to release.  Must not be null.
     *
     * @throws IllegalStateException if the connection was not acquired
     * from this pool or if it has already been released.
     */
    public void releaseConnection(SQLiteConnection connection) {
        synchronized (mLock) {
            AcquiredConnectionStatus status = mAcquiredConnections.remove(connection);
            if (status == null) {
                throw new IllegalStateException("Cannot perform this operation "
                        + "because the specified connection was not acquired "
                        + "from this pool or has already been released.");
            }

            if (!mIsOpen) {
                closeConnectionAndLogExceptionsLocked(connection);
            } else if (connection.isPrimaryConnection()) {
                if (recycleConnectionLocked(connection, status)) {
                    assert mAvailablePrimaryConnection == null;
                    mAvailablePrimaryConnection = connection;
                }
                wakeConnectionWaitersLocked();
            } else if (mAvailableNonPrimaryConnections.size() >= mMaxConnectionPoolSize - 1) {
                closeConnectionAndLogExceptionsLocked(connection);
            } else {
                if (recycleConnectionLocked(connection, status)) {
                    mAvailableNonPrimaryConnections.add(connection);
                }
                wakeConnectionWaitersLocked();
            }
        }
    }

    // Can't throw.
    private boolean recycleConnectionLocked(SQLiteConnection connection,
            AcquiredConnectionStatus status) {
        if (status == AcquiredConnectionStatus.RECONFIGURE) {
            try {
                connection.reconfigure(mConfiguration); // might throw
            } catch (RuntimeException ex) {
                Log.e(TAG, "Failed to reconfigure released connection, closing it: "
                        + connection, ex);
                status = AcquiredConnectionStatus.DISCARD;
            }
        }
        if (status == AcquiredConnectionStatus.DISCARD) {
            closeConnectionAndLogExceptionsLocked(connection);
            return false;
        }
        return true;
    }

    /**
     * Returns true if the session should yield the connection due to
     * contention over available database connections.
     *
     * @param connection The connection owned by the session.
     * @param connectionFlags The connection request flags.
     * @return True if the session should yield its connection.
     *
     * @throws IllegalStateException if the connection was not acquired
     * from this pool or if it has already been released.
     */
    public boolean shouldYieldConnection(SQLiteConnection connection, int connectionFlags) {
        synchronized (mLock) {
            if (!mAcquiredConnections.containsKey(connection)) {
                throw new IllegalStateException("Cannot perform this operation "
                        + "because the specified connection was not acquired "
                        + "from this pool or has already been released.");
            }

            if (!mIsOpen) {
                return false;
            }

            return isSessionBlockingImportantConnectionWaitersLocked(
                    connection.isPrimaryConnection(), connectionFlags);
        }
    }

    /**
     * Collects statistics about database connection memory usage.
     *
     * @param dbStatsList The list to populate.
     */
    public void collectDbStats(ArrayList<DbStats> dbStatsList) {
        synchronized (mLock) {
            if (mAvailablePrimaryConnection != null) {
                mAvailablePrimaryConnection.collectDbStats(dbStatsList);
            }

            for (SQLiteConnection connection : mAvailableNonPrimaryConnections) {
                connection.collectDbStats(dbStatsList);
            }

            for (SQLiteConnection connection : mAcquiredConnections.keySet()) {
                connection.collectDbStatsUnsafe(dbStatsList);
            }
        }
    }

    // Might throw.
    private SQLiteConnection openConnectionLocked(SQLiteDatabaseConfiguration configuration,
            boolean primaryConnection) {
        final int connectionId = mNextConnectionId++;
        return SQLiteConnection.open(this, configuration,
                connectionId, primaryConnection); // might throw
    }

    void onConnectionLeaked() {
        // This code is running inside of the SQLiteConnection finalizer.
        //
        // We don't know whether it is just the connection that has been finalized (and leaked)
        // or whether the connection pool has also been or is about to be finalized.
        // Consequently, it would be a bad idea to try to grab any locks or to
        // do any significant work here.  So we do the simplest possible thing and
        // set a flag.  waitForConnection() periodically checks this flag (when it
        // times out) so that it can recover from leaked connections and wake
        // itself or other threads up if necessary.
        //
        // You might still wonder why we don't try to do more to wake up the waiters
        // immediately.  First, as explained above, it would be hard to do safely
        // unless we started an extra Thread to function as a reference queue.  Second,
        // this is never supposed to happen in normal operation.  Third, there is no
        // guarantee that the GC will actually detect the leak in a timely manner so
        // it's not all that important that we recover from the leak in a timely manner
        // either.  Fourth, if a badly behaved application finds itself hung waiting for
        // several seconds while waiting for a leaked connection to be detected and recreated,
        // then perhaps its authors will have added incentive to fix the problem!

        Log.w(TAG, "A SQLiteConnection object for database '"
                + mConfiguration.label + "' was leaked!  Please fix your application "
                + "to end transactions in progress properly and to close the database "
                + "when it is no longer needed.");

        mConnectionLeaked.set(true);
    }

    // Can't throw.
    private void closeAvailableConnectionsAndLogExceptionsLocked() {
        closeAvailableNonPrimaryConnectionsAndLogExceptionsLocked();

        if (mAvailablePrimaryConnection != null) {
            closeConnectionAndLogExceptionsLocked(mAvailablePrimaryConnection);
            mAvailablePrimaryConnection = null;
        }
    }

    // Can't throw.
    private void closeAvailableNonPrimaryConnectionsAndLogExceptionsLocked() {
        final int count = mAvailableNonPrimaryConnections.size();
        for (int i = 0; i < count; i++) {
            closeConnectionAndLogExceptionsLocked(mAvailableNonPrimaryConnections.get(i));
        }
        mAvailableNonPrimaryConnections.clear();
    }

    // Can't throw.
    private void closeExcessConnectionsAndLogExceptionsLocked() {
        int availableCount = mAvailableNonPrimaryConnections.size();
        while (availableCount-- > mMaxConnectionPoolSize - 1) {
            SQLiteConnection connection =
                    mAvailableNonPrimaryConnections.remove(availableCount);
            closeConnectionAndLogExceptionsLocked(connection);
        }
    }

    // Can't throw.
    private void closeConnectionAndLogExceptionsLocked(SQLiteConnection connection) {
        try {
            connection.close(); // might throw
        } catch (RuntimeException ex) {
            Log.e(TAG, "Failed to close connection, its fate is now in the hands "
                    + "of the merciful GC: " + connection, ex);
        }
    }

    // Can't throw.
    private void discardAcquiredConnectionsLocked() {
        markAcquiredConnectionsLocked(AcquiredConnectionStatus.DISCARD);
    }

    // Can't throw.
    private void reconfigureAllConnectionsLocked() {
        if (mAvailablePrimaryConnection != null) {
            try {
                mAvailablePrimaryConnection.reconfigure(mConfiguration); // might throw
            } catch (RuntimeException ex) {
                Log.e(TAG, "Failed to reconfigure available primary connection, closing it: "
                        + mAvailablePrimaryConnection, ex);
                closeConnectionAndLogExceptionsLocked(mAvailablePrimaryConnection);
                mAvailablePrimaryConnection = null;
            }
        }

        int count = mAvailableNonPrimaryConnections.size();
        for (int i = 0; i < count; i++) {
            final SQLiteConnection connection = mAvailableNonPrimaryConnections.get(i);
            try {
                connection.reconfigure(mConfiguration); // might throw
            } catch (RuntimeException ex) {
                Log.e(TAG, "Failed to reconfigure available non-primary connection, closing it: "
                        + connection, ex);
                closeConnectionAndLogExceptionsLocked(connection);
                mAvailableNonPrimaryConnections.remove(i--);
                count -= 1;
            }
        }

        markAcquiredConnectionsLocked(AcquiredConnectionStatus.RECONFIGURE);
    }

    // Can't throw.
    private void markAcquiredConnectionsLocked(AcquiredConnectionStatus status) {
        if (!mAcquiredConnections.isEmpty()) {
            ArrayList<SQLiteConnection> keysToUpdate = new ArrayList<SQLiteConnection>(
                    mAcquiredConnections.size());
            for (Map.Entry<SQLiteConnection, AcquiredConnectionStatus> entry
                    : mAcquiredConnections.entrySet()) {
                AcquiredConnectionStatus oldStatus = entry.getValue();
                if (status != oldStatus
                        && oldStatus != AcquiredConnectionStatus.DISCARD) {
                    keysToUpdate.add(entry.getKey());
                }
            }
            final int updateCount = keysToUpdate.size();
            for (int i = 0; i < updateCount; i++) {
                mAcquiredConnections.put(keysToUpdate.get(i), status);
            }
        }
    }

    // Might throw.
    private SQLiteConnection waitForConnection(String sql, int connectionFlags,
            CancellationSignal cancellationSignal) {
        final boolean wantPrimaryConnection =
                (connectionFlags & CONNECTION_FLAG_PRIMARY_CONNECTION_AFFINITY) != 0;

        final ConnectionWaiter waiter;
        final int nonce;
        synchronized (mLock) {
            throwIfClosedLocked();

            // Abort if canceled.
            if (cancellationSignal != null) {
                cancellationSignal.throwIfCanceled();
            }

            // Try to acquire a connection.
            SQLiteConnection connection = null;
            if (!wantPrimaryConnection) {
                connection = tryAcquireNonPrimaryConnectionLocked(
                        sql, connectionFlags); // might throw
            }
            if (connection == null) {
                connection = tryAcquirePrimaryConnectionLocked(connectionFlags); // might throw
            }
            if (connection != null) {
                return connection;
            }

            // No connections available.  Enqueue a waiter in priority order.
            final int priority = getPriority(connectionFlags);
            final long startTime = SystemClock.uptimeMillis();
            waiter = obtainConnectionWaiterLocked(Thread.currentThread(), startTime,
                    priority, wantPrimaryConnection, sql, connectionFlags);
            ConnectionWaiter predecessor = null;
            ConnectionWaiter successor = mConnectionWaiterQueue;
            while (successor != null) {
                if (priority > successor.mPriority) {
                    waiter.mNext = successor;
                    break;
                }
                predecessor = successor;
                successor = successor.mNext;
            }
            if (predecessor != null) {
                predecessor.mNext = waiter;
            } else {
                mConnectionWaiterQueue = waiter;
            }

            nonce = waiter.mNonce;
        }

        // Set up the cancellation listener.
        if (cancellationSignal != null) {
            cancellationSignal.setOnCancelListener(new CancellationSignal.OnCancelListener() {
                @Override
                public void onCancel() {
                    synchronized (mLock) {
                        if (waiter.mNonce == nonce) {
                            cancelConnectionWaiterLocked(waiter);
                        }
                    }
                }
            });
        }
        try {
            // Park the thread until a connection is assigned or the pool is closed.
            // Rethrow an exception from the wait, if we got one.
            long busyTimeoutMillis = CONNECTION_POOL_BUSY_MILLIS;
            long nextBusyTimeoutTime = waiter.mStartTime + busyTimeoutMillis;
            for (;;) {
                // Detect and recover from connection leaks.
                if (mConnectionLeaked.compareAndSet(true, false)) {
                    synchronized (mLock) {
                        wakeConnectionWaitersLocked();
                    }
                }

                // Wait to be unparked (may already have happened), a timeout, or interruption.
                LockSupport.parkNanos(this, busyTimeoutMillis * 1000000L);

                // Clear the interrupted flag, just in case.
                Thread.interrupted();

                // Check whether we are done waiting yet.
                synchronized (mLock) {
                    throwIfClosedLocked();

                    final SQLiteConnection connection = waiter.mAssignedConnection;
                    final RuntimeException ex = waiter.mException;
                    if (connection != null || ex != null) {
                        recycleConnectionWaiterLocked(waiter);
                        if (connection != null) {
                            return connection;
                        }
                        throw ex; // rethrow!
                    }

                    final long now = SystemClock.uptimeMillis();
                    if (now < nextBusyTimeoutTime) {
                        busyTimeoutMillis = now - nextBusyTimeoutTime;
                    } else {
                        logConnectionPoolBusyLocked(now - waiter.mStartTime, connectionFlags);
                        busyTimeoutMillis = CONNECTION_POOL_BUSY_MILLIS;
                        nextBusyTimeoutTime = now + busyTimeoutMillis;
                    }
                }
            }
        } finally {
            // Remove the cancellation listener.
            if (cancellationSignal != null) {
                cancellationSignal.setOnCancelListener(null);
            }
        }
    }

    // Can't throw.
    private void cancelConnectionWaiterLocked(ConnectionWaiter waiter) {
        if (waiter.mAssignedConnection != null || waiter.mException != null) {
            // Waiter is done waiting but has not woken up yet.
            return;
        }

        // Waiter must still be waiting.  Dequeue it.
        ConnectionWaiter predecessor = null;
        ConnectionWaiter current = mConnectionWaiterQueue;
        while (current != waiter) {
            assert current != null;
            predecessor = current;
            current = current.mNext;
        }
        if (predecessor != null) {
            predecessor.mNext = waiter.mNext;
        } else {
            mConnectionWaiterQueue = waiter.mNext;
        }

        // Send the waiter an exception and unpark it.
        waiter.mException = new OperationCanceledException();
        LockSupport.unpark(waiter.mThread);

        // Check whether removing this waiter will enable other waiters to make progress.
        wakeConnectionWaitersLocked();
    }

    // Can't throw.
    private void logConnectionPoolBusyLocked(long waitMillis, int connectionFlags) {
        final Thread thread = Thread.currentThread();
        StringBuilder msg = new StringBuilder();
        msg.append("The connection pool for database '").append(mConfiguration.label);
        msg.append("' has been unable to grant a connection to thread ");
        msg.append(thread.getId()).append(" (").append(thread.getName()).append(") ");
        msg.append("with flags 0x").append(Integer.toHexString(connectionFlags));
        msg.append(" for ").append(waitMillis * 0.001f).append(" seconds.\n");

        ArrayList<String> requests = new ArrayList<String>();
        int activeConnections = 0;
        int idleConnections = 0;
        if (!mAcquiredConnections.isEmpty()) {
            for (SQLiteConnection connection : mAcquiredConnections.keySet()) {
                String description = connection.describeCurrentOperationUnsafe();
                if (description != null) {
                    requests.add(description);
                    activeConnections += 1;
                } else {
                    idleConnections += 1;
                }
            }
        }
        int availableConnections = mAvailableNonPrimaryConnections.size();
        if (mAvailablePrimaryConnection != null) {
            availableConnections += 1;
        }

        msg.append("Connections: ").append(activeConnections).append(" active, ");
        msg.append(idleConnections).append(" idle, ");
        msg.append(availableConnections).append(" available.\n");

        if (!requests.isEmpty()) {
            msg.append("\nRequests in progress:\n");
            for (String request : requests) {
                msg.append("  ").append(request).append("\n");
            }
        }

        Log.w(TAG, msg.toString());
    }

    // Can't throw.
    private void wakeConnectionWaitersLocked() {
        // Unpark all waiters that have requests that we can fulfill.
        // This method is designed to not throw runtime exceptions, although we might send
        // a waiter an exception for it to rethrow.
        ConnectionWaiter predecessor = null;
        ConnectionWaiter waiter = mConnectionWaiterQueue;
        boolean primaryConnectionNotAvailable = false;
        boolean nonPrimaryConnectionNotAvailable = false;
        while (waiter != null) {
            boolean unpark = false;
            if (!mIsOpen) {
                unpark = true;
            } else {
                try {
                    SQLiteConnection connection = null;
                    if (!waiter.mWantPrimaryConnection && !nonPrimaryConnectionNotAvailable) {
                        connection = tryAcquireNonPrimaryConnectionLocked(
                                waiter.mSql, waiter.mConnectionFlags); // might throw
                        if (connection == null) {
                            nonPrimaryConnectionNotAvailable = true;
                        }
                    }
                    if (connection == null && !primaryConnectionNotAvailable) {
                        connection = tryAcquirePrimaryConnectionLocked(
                                waiter.mConnectionFlags); // might throw
                        if (connection == null) {
                            primaryConnectionNotAvailable = true;
                        }
                    }
                    if (connection != null) {
                        waiter.mAssignedConnection = connection;
                        unpark = true;
                    } else if (nonPrimaryConnectionNotAvailable && primaryConnectionNotAvailable) {
                        // There are no connections available and the pool is still open.
                        // We cannot fulfill any more connection requests, so stop here.
                        break;
                    }
                } catch (RuntimeException ex) {
                    // Let the waiter handle the exception from acquiring a connection.
                    waiter.mException = ex;
                    unpark = true;
                }
            }

            final ConnectionWaiter successor = waiter.mNext;
            if (unpark) {
                if (predecessor != null) {
                    predecessor.mNext = successor;
                } else {
                    mConnectionWaiterQueue = successor;
                }
                waiter.mNext = null;

                LockSupport.unpark(waiter.mThread);
            } else {
                predecessor = waiter;
            }
            waiter = successor;
        }
    }

    // Might throw.
    private SQLiteConnection tryAcquirePrimaryConnectionLocked(int connectionFlags) {
        // If the primary connection is available, acquire it now.
        SQLiteConnection connection = mAvailablePrimaryConnection;
        if (connection != null) {
            mAvailablePrimaryConnection = null;
            finishAcquireConnectionLocked(connection, connectionFlags); // might throw
            return connection;
        }

        // Make sure that the primary connection actually exists and has just been acquired.
        for (SQLiteConnection acquiredConnection : mAcquiredConnections.keySet()) {
            if (acquiredConnection.isPrimaryConnection()) {
                return null;
            }
        }

        // Uhoh.  No primary connection!  Either this is the first time we asked
        // for it, or maybe it leaked?
        connection = openConnectionLocked(mConfiguration,
                true /*primaryConnection*/); // might throw
        finishAcquireConnectionLocked(connection, connectionFlags); // might throw
        return connection;
    }

    // Might throw.
    private SQLiteConnection tryAcquireNonPrimaryConnectionLocked(
            String sql, int connectionFlags) {
        // Try to acquire the next connection in the queue.
        SQLiteConnection connection;
        final int availableCount = mAvailableNonPrimaryConnections.size();
        if (availableCount > 1 && sql != null) {
            // If we have a choice, then prefer a connection that has the
            // prepared statement in its cache.
            for (int i = 0; i < availableCount; i++) {
                connection = mAvailableNonPrimaryConnections.get(i);
                if (connection.isPreparedStatementInCache(sql)) {
                    mAvailableNonPrimaryConnections.remove(i);
                    finishAcquireConnectionLocked(connection, connectionFlags); // might throw
                    return connection;
                }
            }
        }
        if (availableCount > 0) {
            // Otherwise, just grab the next one.
            connection = mAvailableNonPrimaryConnections.remove(availableCount - 1);
            finishAcquireConnectionLocked(connection, connectionFlags); // might throw
            return connection;
        }

        // Expand the pool if needed.
        int openConnections = mAcquiredConnections.size();
        if (mAvailablePrimaryConnection != null) {
            openConnections += 1;
        }
        if (openConnections >= mMaxConnectionPoolSize) {
            return null;
        }
        connection = openConnectionLocked(mConfiguration,
                false /*primaryConnection*/); // might throw
        finishAcquireConnectionLocked(connection, connectionFlags); // might throw
        return connection;
    }

    // Might throw.
    private void finishAcquireConnectionLocked(SQLiteConnection connection, int connectionFlags) {
        try {
            final boolean readOnly = (connectionFlags & CONNECTION_FLAG_READ_ONLY) != 0;
            connection.setOnlyAllowReadOnlyOperations(readOnly);

            mAcquiredConnections.put(connection, AcquiredConnectionStatus.NORMAL);
        } catch (RuntimeException ex) {
            Log.e(TAG, "Failed to prepare acquired connection for session, closing it: "
                    + connection +", connectionFlags=" + connectionFlags);
            closeConnectionAndLogExceptionsLocked(connection);
            throw ex; // rethrow!
        }
    }

    private boolean isSessionBlockingImportantConnectionWaitersLocked(
            boolean holdingPrimaryConnection, int connectionFlags) {
        ConnectionWaiter waiter = mConnectionWaiterQueue;
        if (waiter != null) {
            final int priority = getPriority(connectionFlags);
            do {
                // Only worry about blocked connections that have same or lower priority.
                if (priority > waiter.mPriority) {
                    break;
                }

                // If we are holding the primary connection then we are blocking the waiter.
                // Likewise, if we are holding a non-primary connection and the waiter
                // would accept a non-primary connection, then we are blocking the waier.
                if (holdingPrimaryConnection || !waiter.mWantPrimaryConnection) {
                    return true;
                }

                waiter = waiter.mNext;
            } while (waiter != null);
        }
        return false;
    }

    private static int getPriority(int connectionFlags) {
        return (connectionFlags & CONNECTION_FLAG_INTERACTIVE) != 0 ? 1 : 0;
    }

    private void setMaxConnectionPoolSizeLocked() {
        if ((mConfiguration.openFlags & SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING) != 0) {
            mMaxConnectionPoolSize = SQLiteGlobal.getWALConnectionPoolSize();
        } else {
            // TODO: We don't actually need to restrict the connection pool size to 1
            // for non-WAL databases.  There might be reasons to use connection pooling
            // with other journal modes.  For now, enabling connection pooling and
            // using WAL are the same thing in the API.
            mMaxConnectionPoolSize = 1;
        }
    }

    private void throwIfClosedLocked() {
        if (!mIsOpen) {
            throw new IllegalStateException("Cannot perform this operation "
                    + "because the connection pool has been closed.");
        }
    }

    private ConnectionWaiter obtainConnectionWaiterLocked(Thread thread, long startTime,
            int priority, boolean wantPrimaryConnection, String sql, int connectionFlags) {
        ConnectionWaiter waiter = mConnectionWaiterPool;
        if (waiter != null) {
            mConnectionWaiterPool = waiter.mNext;
            waiter.mNext = null;
        } else {
            waiter = new ConnectionWaiter();
        }
        waiter.mThread = thread;
        waiter.mStartTime = startTime;
        waiter.mPriority = priority;
        waiter.mWantPrimaryConnection = wantPrimaryConnection;
        waiter.mSql = sql;
        waiter.mConnectionFlags = connectionFlags;
        return waiter;
    }

    private void recycleConnectionWaiterLocked(ConnectionWaiter waiter) {
        waiter.mNext = mConnectionWaiterPool;
        waiter.mThread = null;
        waiter.mSql = null;
        waiter.mAssignedConnection = null;
        waiter.mException = null;
        waiter.mNonce += 1;
        mConnectionWaiterPool = waiter;
    }

    public void enableLocalizedCollators() {
      synchronized (mLock) {
	if( !mAcquiredConnections.isEmpty() || mAvailablePrimaryConnection==null ) {
	  throw new IllegalStateException(
	      "Cannot enable localized collators while database is in use"
	  );
	}
	mAvailablePrimaryConnection.enableLocalizedCollators();
      }
    }

    /**
     * Dumps debugging information about this connection pool.
     *
     * @param printer The printer to receive the dump, not null.
     * @param verbose True to dump more verbose information.
     */
    public void dump(Printer printer, boolean verbose) {
      /*
        Printer indentedPrinter = Printer.create(printer, "    ");
        synchronized (mLock) {
            printer.println("Connection pool for " + mConfiguration.path + ":");
            printer.println("  Open: " + mIsOpen);
            printer.println("  Max connections: " + mMaxConnectionPoolSize);

            printer.println("  Available primary connection:");
            if (mAvailablePrimaryConnection != null) {
                mAvailablePrimaryConnection.dump(indentedPrinter, verbose);
            } else {
                indentedPrinter.println("<none>");
            }

            printer.println("  Available non-primary connections:");
            if (!mAvailableNonPrimaryConnections.isEmpty()) {
                final int count = mAvailableNonPrimaryConnections.size();
                for (int i = 0; i < count; i++) {
                    mAvailableNonPrimaryConnections.get(i).dump(indentedPrinter, verbose);
                }
            } else {
                indentedPrinter.println("<none>");
            }

            printer.println("  Acquired connections:");
            if (!mAcquiredConnections.isEmpty()) {
                for (Map.Entry<SQLiteConnection, AcquiredConnectionStatus> entry :
                        mAcquiredConnections.entrySet()) {
                    final SQLiteConnection connection = entry.getKey();
                    connection.dumpUnsafe(indentedPrinter, verbose);
                    indentedPrinter.println("  Status: " + entry.getValue());
                }
            } else {
                indentedPrinter.println("<none>");
            }

            printer.println("  Connection waiters:");
            if (mConnectionWaiterQueue != null) {
                int i = 0;
                final long now = SystemClock.uptimeMillis();
                for (ConnectionWaiter waiter = mConnectionWaiterQueue; waiter != null;
                        waiter = waiter.mNext, i++) {
                    indentedPrinter.println(i + ": waited for "
                            + ((now - waiter.mStartTime) * 0.001f)
                            + " ms - thread=" + waiter.mThread
                            + ", priority=" + waiter.mPriority
                            + ", sql='" + waiter.mSql + "'");
                }
            } else {
                indentedPrinter.println("<none>");
            }
        }
        */
    }

    @Override
    public String toString() {
        return "SQLiteConnectionPool: " + mConfiguration.path;
    }

    private static final class ConnectionWaiter {
        public ConnectionWaiter mNext;
        public Thread mThread;
        public long mStartTime;
        public int mPriority;
        public boolean mWantPrimaryConnection;
        public String mSql;
        public int mConnectionFlags;
        public SQLiteConnection mAssignedConnection;
        public RuntimeException mException;
        public int mNonce;
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteConstraintException.java.





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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that an integrity constraint was violated.
 */
public class SQLiteConstraintException extends SQLiteException {
    public SQLiteConstraintException() {}

    public SQLiteConstraintException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteCursor.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import org.sqlite.database.ExtraUtils;

import android.database.AbstractWindowedCursor;
import android.database.CursorWindow;

import android.os.StrictMode;
import android.util.Log;

import java.util.HashMap;
import java.util.Map;

/**
 * A Cursor implementation that exposes results from a query on a
 * {@link SQLiteDatabase}.
 *
 * SQLiteCursor is not internally synchronized so code using a SQLiteCursor from multiple
 * threads should perform its own synchronization when using the SQLiteCursor.
 */
public class SQLiteCursor extends AbstractWindowedCursor {
    static final String TAG = "SQLiteCursor";
    static final int NO_COUNT = -1;

    /** The name of the table to edit */
    private final String mEditTable;

    /** The names of the columns in the rows */
    private final String[] mColumns;

    /** The query object for the cursor */
    private final SQLiteQuery mQuery;

    /** The compiled query this cursor came from */
    private final SQLiteCursorDriver mDriver;

    /** The number of rows in the cursor */
    private int mCount = NO_COUNT;

    /** The number of rows that can fit in the cursor window, 0 if unknown */
    private int mCursorWindowCapacity;

    /** A mapping of column names to column indices, to speed up lookups */
    private Map<String, Integer> mColumnNameMap;

    /** Used to find out where a cursor was allocated in case it never got released. */
    private final Throwable mStackTrace;

    /**
     * Execute a query and provide access to its result set through a Cursor
     * interface. For a query such as: {@code SELECT name, birth, phone FROM
     * myTable WHERE ... LIMIT 1,20 ORDER BY...} the column names (name, birth,
     * phone) would be in the projection argument and everything from
     * {@code FROM} onward would be in the params argument.
     *
     * @param db a reference to a Database object that is already constructed
     *     and opened. This param is not used any longer
     * @param editTable the name of the table used for this query
     * @param query the rest of the query terms
     *     cursor is finalized
     * @deprecated use {@link #SQLiteCursor(SQLiteCursorDriver, String, SQLiteQuery)} instead
     */
    @Deprecated
    public SQLiteCursor(SQLiteDatabase db, SQLiteCursorDriver driver,
            String editTable, SQLiteQuery query) {
        this(driver, editTable, query);
    }

    /**
     * Execute a query and provide access to its result set through a Cursor
     * interface. For a query such as: {@code SELECT name, birth, phone FROM
     * myTable WHERE ... LIMIT 1,20 ORDER BY...} the column names (name, birth,
     * phone) would be in the projection argument and everything from
     * {@code FROM} onward would be in the params argument.
     *
     * @param editTable the name of the table used for this query
     * @param query the {@link SQLiteQuery} object associated with this cursor object.
     */
    public SQLiteCursor(SQLiteCursorDriver driver, String editTable, SQLiteQuery query) {
        if (query == null) {
            throw new IllegalArgumentException("query object cannot be null");
        }
        if (/* StrictMode.vmSqliteObjectLeaksEnabled() */ false ) {
            mStackTrace = new DatabaseObjectNotClosedException().fillInStackTrace();
        } else {
            mStackTrace = null;
        }
        mDriver = driver;
        mEditTable = editTable;
        mColumnNameMap = null;
        mQuery = query;

        mColumns = query.getColumnNames();
        mRowIdColumnIndex = ExtraUtils.findRowIdColumnIndex(mColumns);
    }

    /**
     * Get the database that this cursor is associated with.
     * @return the SQLiteDatabase that this cursor is associated with.
     */
    public SQLiteDatabase getDatabase() {
        return mQuery.getDatabase();
    }

    @Override
    public boolean onMove(int oldPosition, int newPosition) {
        // Make sure the row at newPosition is present in the window
        if (mWindow == null || newPosition < mWindow.getStartPosition() ||
                newPosition >= (mWindow.getStartPosition() + mWindow.getNumRows())) {
            fillWindow(newPosition);
        }

        return true;
    }

    @Override
    public int getCount() {
        if (mCount == NO_COUNT) {
            fillWindow(0);
        }
        return mCount;
    }

    /* 
    ** The AbstractWindowClass contains protected methods clearOrCreateWindow() and
    ** closeWindow(), which are used by the android.database.sqlite.* version of this
    ** class. But, since they are marked with "@hide", the following replacement 
    ** versions are required.
    */
    private void awc_clearOrCreateWindow(String name){
      CursorWindow win = getWindow();
      if( win==null ){
        win = new CursorWindow(name);
        setWindow(win);
      }else{
        win.clear();
      }
    }
    private void awc_closeWindow(){
      setWindow(null);
    }

    private void fillWindow(int requiredPos) {
        awc_clearOrCreateWindow(getDatabase().getPath());

        try {
            if (mCount == NO_COUNT) {
                int startPos = ExtraUtils.cursorPickFillWindowStartPosition(requiredPos, 0);
                mCount = mQuery.fillWindow(mWindow, startPos, requiredPos, true);
                mCursorWindowCapacity = mWindow.getNumRows();
                if (Log.isLoggable(TAG, Log.DEBUG)) {
                    Log.d(TAG, "received count(*) from native_fill_window: " + mCount);
                }
            } else {
                int startPos = ExtraUtils.cursorPickFillWindowStartPosition(requiredPos,
                        mCursorWindowCapacity);
                mQuery.fillWindow(mWindow, startPos, requiredPos, false);
            }
        } catch (RuntimeException ex) {
            // Close the cursor window if the query failed and therefore will
            // not produce any results.  This helps to avoid accidentally leaking
            // the cursor window if the client does not correctly handle exceptions
            // and fails to close the cursor.
            awc_closeWindow();
            throw ex;
        }
    }

    @Override
    public int getColumnIndex(String columnName) {
        // Create mColumnNameMap on demand
        if (mColumnNameMap == null) {
            String[] columns = mColumns;
            int columnCount = columns.length;
            HashMap<String, Integer> map = new HashMap<String, Integer>(columnCount, 1);
            for (int i = 0; i < columnCount; i++) {
                map.put(columns[i], i);
            }
            mColumnNameMap = map;
        }

        // Hack according to bug 903852
        final int periodIndex = columnName.lastIndexOf('.');
        if (periodIndex != -1) {
            Exception e = new Exception();
            Log.e(TAG, "requesting column name with table name -- " + columnName, e);
            columnName = columnName.substring(periodIndex + 1);
        }

        Integer i = mColumnNameMap.get(columnName);
        if (i != null) {
            return i.intValue();
        } else {
            return -1;
        }
    }

    @Override
    public String[] getColumnNames() {
        return mColumns;
    }

    @Override
    public void deactivate() {
        super.deactivate();
        mDriver.cursorDeactivated();
    }

    @Override
    public void close() {
        super.close();
        synchronized (this) {
            mQuery.close();
            mDriver.cursorClosed();
        }
    }

    @Override
    public boolean requery() {
        if (isClosed()) {
            return false;
        }

        synchronized (this) {
            if (!mQuery.getDatabase().isOpen()) {
                return false;
            }

            if (mWindow != null) {
                mWindow.clear();
            }
            mPos = -1;
            mCount = NO_COUNT;

            mDriver.cursorRequeried(this);
        }

        try {
            return super.requery();
        } catch (IllegalStateException e) {
            // for backwards compatibility, just return false
            Log.w(TAG, "requery() failed " + e.getMessage(), e);
            return false;
        }
    }

    @Override
    public void setWindow(CursorWindow window) {
        super.setWindow(window);
        mCount = NO_COUNT;
    }

    /**
     * Changes the selection arguments. The new values take effect after a call to requery().
     */
    public void setSelectionArguments(String[] selectionArgs) {
        mDriver.setBindArguments(selectionArgs);
    }

    /**
     * Release the native resources, if they haven't been released yet.
     */
    @Override
    protected void finalize() {
        try {
            // if the cursor hasn't been closed yet, close it first
            if (mWindow != null) {
                    /*
                if (mStackTrace != null) {
                    String sql = mQuery.getSql();
                    int len = sql.length();
                    StrictMode.onSqliteObjectLeaked(
                        "Finalizing a Cursor that has not been deactivated or closed. " +
                        "database = " + mQuery.getDatabase().getLabel() +
                        ", table = " + mEditTable +
                        ", query = " + sql.substring(0, (len > 1000) ? 1000 : len),
                        mStackTrace);
                }
                */
                close();
            }
        } finally {
            super.finalize();
        }
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteCursorDriver.java.





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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.database.Cursor;
import org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory;

/**
 * A driver for SQLiteCursors that is used to create them and gets notified
 * by the cursors it creates on significant events in their lifetimes.
 */
public interface SQLiteCursorDriver {
    /**
     * Executes the query returning a Cursor over the result set.
     * 
     * @param factory The CursorFactory to use when creating the Cursors, or
     *         null if standard SQLiteCursors should be returned.
     * @return a Cursor over the result set
     */
    Cursor query(CursorFactory factory, String[] bindArgs);

    /**
     * Called by a SQLiteCursor when it is released.
     */
    void cursorDeactivated();

    /**
     * Called by a SQLiteCursor when it is requeried.
     */
    void cursorRequeried(Cursor cursor);

    /**
     * Called by a SQLiteCursor when it it closed to destroy this object as well.
     */
    void cursorClosed();

    /**
     * Set new bind arguments. These will take effect in cursorRequeried().
     * @param bindArgs the new arguments
     */
    public void setBindArguments(String[] bindArgs);
}






Deleted src/org/sqlite/database/sqlite/SQLiteCustomFunction.java.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * Describes a custom SQL function.
 *
 * @hide
 */
public final class SQLiteCustomFunction {
    public final String name;
    public final int numArgs;
    public final SQLiteDatabase.CustomFunction callback;

    /**
     * Create custom function.
     *
     * @param name The name of the sqlite3 function.
     * @param numArgs The number of arguments for the function, or -1 to
     * support any number of arguments.
     * @param callback The callback to invoke when the function is executed.
     */
    public SQLiteCustomFunction(String name, int numArgs,
            SQLiteDatabase.CustomFunction callback) {
        if (name == null) {
            throw new IllegalArgumentException("name must not be null.");
        }

        this.name = name;
        this.numArgs = numArgs;
        this.callback = callback;
    }

    // Called from native.
    @SuppressWarnings("unused")
    private void dispatchCallback(String[] args) {
        callback.callback(args);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDatabase.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.content.ContentValues;
import android.database.Cursor;
import org.sqlite.database.DatabaseErrorHandler;
import android.database.DatabaseUtils;
import org.sqlite.database.ExtraUtils;
import org.sqlite.database.DefaultDatabaseErrorHandler;
import org.sqlite.database.SQLException;
import org.sqlite.database.sqlite.SQLiteDebug.DbStats;
import android.os.CancellationSignal;
import android.os.Looper;
import android.os.OperationCanceledException;
import android.text.TextUtils;
import android.util.EventLog;
import android.util.Log;
import android.util.Pair;
import android.util.Printer;

import dalvik.system.CloseGuard;

import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.WeakHashMap;

/**
 * Exposes methods to manage a SQLite database.
 *
 * <p>
 * SQLiteDatabase has methods to create, delete, execute SQL commands, and
 * perform other common database management tasks.
 * </p><p>
 * See the Notepad sample application in the SDK for an example of creating
 * and managing a database.
 * </p><p>
 * Database names must be unique within an application, not across all applications.
 * </p>
 *
 * <h3>Localized Collation - ORDER BY</h3>
 * <p>
 * In addition to SQLite's default <code>BINARY</code> collator, Android supplies
 * two more, <code>LOCALIZED</code>, which changes with the system's current locale,
 * and <code>UNICODE</code>, which is the Unicode Collation Algorithm and not tailored
 * to the current locale.
 * </p>
 */
public final class SQLiteDatabase extends SQLiteClosable {
    private static final String TAG = "SQLiteDatabase";

    private static final int EVENT_DB_CORRUPT = 75004;

    // Stores reference to all databases opened in the current process.
    // (The referent Object is not used at this time.)
    // INVARIANT: Guarded by sActiveDatabases.
    private static WeakHashMap<SQLiteDatabase, Object> sActiveDatabases =
            new WeakHashMap<SQLiteDatabase, Object>();

    // Thread-local for database sessions that belong to this database.
    // Each thread has its own database session.
    // INVARIANT: Immutable.
    private final ThreadLocal<SQLiteSession> mThreadSession = new ThreadLocal<SQLiteSession>() {
        @Override
        protected SQLiteSession initialValue() {
            return createSession();
        }
    };

    // The optional factory to use when creating new Cursors.  May be null.
    // INVARIANT: Immutable.
    private final CursorFactory mCursorFactory;

    // Error handler to be used when SQLite returns corruption errors.
    // INVARIANT: Immutable.
    private final DatabaseErrorHandler mErrorHandler;

    // Shared database state lock.
    // This lock guards all of the shared state of the database, such as its
    // configuration, whether it is open or closed, and so on.  This lock should
    // be held for as little time as possible.
    //
    // The lock MUST NOT be held while attempting to acquire database connections or
    // while executing SQL statements on behalf of the client as it can lead to deadlock.
    //
    // It is ok to hold the lock while reconfiguring the connection pool or dumping
    // statistics because those operations are non-reentrant and do not try to acquire
    // connections that might be held by other threads.
    //
    // Basic rule: grab the lock, access or modify global state, release the lock, then
    // do the required SQL work.
    private final Object mLock = new Object();

    // Warns if the database is finalized without being closed properly.
    // INVARIANT: Guarded by mLock.
    private final CloseGuard mCloseGuardLocked = CloseGuard.get();

    // The database configuration.
    // INVARIANT: Guarded by mLock.
    private final SQLiteDatabaseConfiguration mConfigurationLocked;

    // The connection pool for the database, null when closed.
    // The pool itself is thread-safe, but the reference to it can only be acquired
    // when the lock is held.
    // INVARIANT: Guarded by mLock.
    private SQLiteConnectionPool mConnectionPoolLocked;

    // True if the database has attached databases.
    // INVARIANT: Guarded by mLock.
    private boolean mHasAttachedDbsLocked;

    /**
     * When a constraint violation occurs, an immediate ROLLBACK occurs,
     * thus ending the current transaction, and the command aborts with a
     * return code of SQLITE_CONSTRAINT. If no transaction is active
     * (other than the implied transaction that is created on every command)
     * then this algorithm works the same as ABORT.
     */
    public static final int CONFLICT_ROLLBACK = 1;

    /**
     * When a constraint violation occurs,no ROLLBACK is executed
     * so changes from prior commands within the same transaction
     * are preserved. This is the default behavior.
     */
    public static final int CONFLICT_ABORT = 2;

    /**
     * When a constraint violation occurs, the command aborts with a return
     * code SQLITE_CONSTRAINT. But any changes to the database that
     * the command made prior to encountering the constraint violation
     * are preserved and are not backed out.
     */
    public static final int CONFLICT_FAIL = 3;

    /**
     * When a constraint violation occurs, the one row that contains
     * the constraint violation is not inserted or changed.
     * But the command continues executing normally. Other rows before and
     * after the row that contained the constraint violation continue to be
     * inserted or updated normally. No error is returned.
     */
    public static final int CONFLICT_IGNORE = 4;

    /**
     * When a UNIQUE constraint violation occurs, the pre-existing rows that
     * are causing the constraint violation are removed prior to inserting
     * or updating the current row. Thus the insert or update always occurs.
     * The command continues executing normally. No error is returned.
     * If a NOT NULL constraint violation occurs, the NULL value is replaced
     * by the default value for that column. If the column has no default
     * value, then the ABORT algorithm is used. If a CHECK constraint
     * violation occurs then the IGNORE algorithm is used. When this conflict
     * resolution strategy deletes rows in order to satisfy a constraint,
     * it does not invoke delete triggers on those rows.
     * This behavior might change in a future release.
     */
    public static final int CONFLICT_REPLACE = 5;

    /**
     * Use the following when no conflict action is specified.
     */
    public static final int CONFLICT_NONE = 0;

    private static final String[] CONFLICT_VALUES = new String[]
            {"", " OR ROLLBACK ", " OR ABORT ", " OR FAIL ", " OR IGNORE ", " OR REPLACE "};

    /**
     * Maximum Length Of A LIKE Or GLOB Pattern
     * The pattern matching algorithm used in the default LIKE and GLOB implementation
     * of SQLite can exhibit O(N^2) performance (where N is the number of characters in
     * the pattern) for certain pathological cases. To avoid denial-of-service attacks
     * the length of the LIKE or GLOB pattern is limited to SQLITE_MAX_LIKE_PATTERN_LENGTH bytes.
     * The default value of this limit is 50000. A modern workstation can evaluate
     * even a pathological LIKE or GLOB pattern of 50000 bytes relatively quickly.
     * The denial of service problem only comes into play when the pattern length gets
     * into millions of bytes. Nevertheless, since most useful LIKE or GLOB patterns
     * are at most a few dozen bytes in length, paranoid application developers may
     * want to reduce this parameter to something in the range of a few hundred
     * if they know that external users are able to generate arbitrary patterns.
     */
    public static final int SQLITE_MAX_LIKE_PATTERN_LENGTH = 50000;

    /**
     * Open flag: Flag for {@link #openDatabase} to open the database for reading and writing.
     * If the disk is full, this may fail even before you actually write anything.
     *
     * {@more} Note that the value of this flag is 0, so it is the default.
     */
    public static final int OPEN_READWRITE = 0x00000000;          // update native code if changing

    /**
     * Open flag: Flag for {@link #openDatabase} to open the database for reading only.
     * This is the only reliable way to open a database if the disk may be full.
     */
    public static final int OPEN_READONLY = 0x00000001;           // update native code if changing

    private static final int OPEN_READ_MASK = 0x00000001;         // update native code if changing

    /**
     * Open flag: Flag for {@link #openDatabase} to open the database without support for
     * localized collators.
     *
     * {@more} This causes the collator <code>LOCALIZED</code> not to be created.
     * You must be consistent when using this flag to use the setting the database was
     * created with.  If this is set, {@link #setLocale} will do nothing.
     */
    public static final int NO_LOCALIZED_COLLATORS = 0x00000010;  // update native code if changing

    /**
     * Open flag: Flag for {@link #openDatabase} to create the database file if it does not
     * already exist.
     */
    public static final int CREATE_IF_NECESSARY = 0x10000000;     // update native code if changing

    /**
     * Open flag: Flag for {@link #openDatabase} to open the database file with
     * write-ahead logging enabled by default.  Using this flag is more efficient
     * than calling {@link #enableWriteAheadLogging}.
     *
     * Write-ahead logging cannot be used with read-only databases so the value of
     * this flag is ignored if the database is opened read-only.
     *
     * @see #enableWriteAheadLogging
     */
    public static final int ENABLE_WRITE_AHEAD_LOGGING = 0x20000000;

    /**
     * Absolute max value that can be set by {@link #setMaxSqlCacheSize(int)}.
     *
     * Each prepared-statement is between 1K - 6K, depending on the complexity of the
     * SQL statement & schema.  A large SQL cache may use a significant amount of memory.
     */
    public static final int MAX_SQL_CACHE_SIZE = 100;

    private SQLiteDatabase(String path, int openFlags, CursorFactory cursorFactory,
            DatabaseErrorHandler errorHandler) {
        mCursorFactory = cursorFactory;
        mErrorHandler = errorHandler != null ? errorHandler : new DefaultDatabaseErrorHandler();
        mConfigurationLocked = new SQLiteDatabaseConfiguration(path, openFlags);
    }

    @Override
    protected void finalize() throws Throwable {
        try {
            dispose(true);
        } finally {
            super.finalize();
        }
    }

    @Override
    protected void onAllReferencesReleased() {
        dispose(false);
    }

    private void dispose(boolean finalized) {
        final SQLiteConnectionPool pool;
        synchronized (mLock) {
            if (mCloseGuardLocked != null) {
                if (finalized) {
                    mCloseGuardLocked.warnIfOpen();
                }
                mCloseGuardLocked.close();
            }

            pool = mConnectionPoolLocked;
            mConnectionPoolLocked = null;
        }

        if (!finalized) {
            synchronized (sActiveDatabases) {
                sActiveDatabases.remove(this);
            }

            if (pool != null) {
                pool.close();
            }
        }
    }

    /**
     * Attempts to release memory that SQLite holds but does not require to
     * operate properly. Typically this memory will come from the page cache.
     *
     * @return the number of bytes actually released
     */
    public static int releaseMemory() {
        return SQLiteGlobal.releaseMemory();
    }

    /**
     * Control whether or not the SQLiteDatabase is made thread-safe by using locks
     * around critical sections. This is pretty expensive, so if you know that your
     * DB will only be used by a single thread then you should set this to false.
     * The default is true.
     * @param lockingEnabled set to true to enable locks, false otherwise
     *
     * @deprecated This method now does nothing.  Do not use.
     */
    @Deprecated
    public void setLockingEnabled(boolean lockingEnabled) {
    }

    /**
     * Gets a label to use when describing the database in log messages.
     * @return The label.
     */
    String getLabel() {
        synchronized (mLock) {
            return mConfigurationLocked.label;
        }
    }

    /**
     * Sends a corruption message to the database error handler.
     */
    void onCorruption() {
        EventLog.writeEvent(EVENT_DB_CORRUPT, getLabel());
        mErrorHandler.onCorruption(this);
    }

    /**
     * Gets the {@link SQLiteSession} that belongs to this thread for this database.
     * Once a thread has obtained a session, it will continue to obtain the same
     * session even after the database has been closed (although the session will not
     * be usable).  However, a thread that does not already have a session cannot
     * obtain one after the database has been closed.
     *
     * The idea is that threads that have active connections to the database may still
     * have work to complete even after the call to {@link #close}.  Active database
     * connections are not actually disposed until they are released by the threads
     * that own them.
     *
     * @return The session, never null.
     *
     * @throws IllegalStateException if the thread does not yet have a session and
     * the database is not open.
     */
    SQLiteSession getThreadSession() {
        return mThreadSession.get(); // initialValue() throws if database closed
    }

    SQLiteSession createSession() {
        final SQLiteConnectionPool pool;
        synchronized (mLock) {
            throwIfNotOpenLocked();
            pool = mConnectionPoolLocked;
        }
        return new SQLiteSession(pool);
    }

    /**
     * Gets default connection flags that are appropriate for this thread, taking into
     * account whether the thread is acting on behalf of the UI.
     *
     * @param readOnly True if the connection should be read-only.
     * @return The connection flags.
     */
    int getThreadDefaultConnectionFlags(boolean readOnly) {
        int flags = readOnly ? SQLiteConnectionPool.CONNECTION_FLAG_READ_ONLY :
                SQLiteConnectionPool.CONNECTION_FLAG_PRIMARY_CONNECTION_AFFINITY;
        if (isMainThread()) {
            flags |= SQLiteConnectionPool.CONNECTION_FLAG_INTERACTIVE;
        }
        return flags;
    }

    private static boolean isMainThread() {
        // FIXME: There should be a better way to do this.
        // Would also be nice to have something that would work across Binder calls.
        Looper looper = Looper.myLooper();
        return looper != null && looper == Looper.getMainLooper();
    }

    /**
     * Begins a transaction in EXCLUSIVE mode.
     * <p>
     * Transactions can be nested.
     * When the outer transaction is ended all of
     * the work done in that transaction and all of the nested transactions will be committed or
     * rolled back. The changes will be rolled back if any transaction is ended without being
     * marked as clean (by calling setTransactionSuccessful). Otherwise they will be committed.
     * </p>
     * <p>Here is the standard idiom for transactions:
     *
     * <pre>
     *   db.beginTransaction();
     *   try {
     *     ...
     *     db.setTransactionSuccessful();
     *   } finally {
     *     db.endTransaction();
     *   }
     * </pre>
     */
    public void beginTransaction() {
        beginTransaction(null /* transactionStatusCallback */, true);
    }

    /**
     * Begins a transaction in IMMEDIATE mode. Transactions can be nested. When
     * the outer transaction is ended all of the work done in that transaction
     * and all of the nested transactions will be committed or rolled back. The
     * changes will be rolled back if any transaction is ended without being
     * marked as clean (by calling setTransactionSuccessful). Otherwise they
     * will be committed.
     * <p>
     * Here is the standard idiom for transactions:
     *
     * <pre>
     *   db.beginTransactionNonExclusive();
     *   try {
     *     ...
     *     db.setTransactionSuccessful();
     *   } finally {
     *     db.endTransaction();
     *   }
     * </pre>
     */
    public void beginTransactionNonExclusive() {
        beginTransaction(null /* transactionStatusCallback */, false);
    }

    /**
     * Begins a transaction in EXCLUSIVE mode.
     * <p>
     * Transactions can be nested.
     * When the outer transaction is ended all of
     * the work done in that transaction and all of the nested transactions will be committed or
     * rolled back. The changes will be rolled back if any transaction is ended without being
     * marked as clean (by calling setTransactionSuccessful). Otherwise they will be committed.
     * </p>
     * <p>Here is the standard idiom for transactions:
     *
     * <pre>
     *   db.beginTransactionWithListener(listener);
     *   try {
     *     ...
     *     db.setTransactionSuccessful();
     *   } finally {
     *     db.endTransaction();
     *   }
     * </pre>
     *
     * @param transactionListener listener that should be notified when the transaction begins,
     * commits, or is rolled back, either explicitly or by a call to
     * {@link #yieldIfContendedSafely}.
     */
    public void beginTransactionWithListener(SQLiteTransactionListener transactionListener) {
        beginTransaction(transactionListener, true);
    }

    /**
     * Begins a transaction in IMMEDIATE mode. Transactions can be nested. When
     * the outer transaction is ended all of the work done in that transaction
     * and all of the nested transactions will be committed or rolled back. The
     * changes will be rolled back if any transaction is ended without being
     * marked as clean (by calling setTransactionSuccessful). Otherwise they
     * will be committed.
     * <p>
     * Here is the standard idiom for transactions:
     *
     * <pre>
     *   db.beginTransactionWithListenerNonExclusive(listener);
     *   try {
     *     ...
     *     db.setTransactionSuccessful();
     *   } finally {
     *     db.endTransaction();
     *   }
     * </pre>
     *
     * @param transactionListener listener that should be notified when the
     *            transaction begins, commits, or is rolled back, either
     *            explicitly or by a call to {@link #yieldIfContendedSafely}.
     */
    public void beginTransactionWithListenerNonExclusive(
            SQLiteTransactionListener transactionListener) {
        beginTransaction(transactionListener, false);
    }

    private void beginTransaction(SQLiteTransactionListener transactionListener,
            boolean exclusive) {
        acquireReference();
        try {
            getThreadSession().beginTransaction(
                    exclusive ? SQLiteSession.TRANSACTION_MODE_EXCLUSIVE :
                            SQLiteSession.TRANSACTION_MODE_IMMEDIATE,
                    transactionListener,
                    getThreadDefaultConnectionFlags(false /*readOnly*/), null);
        } finally {
            releaseReference();
        }
    }

    /**
     * End a transaction. See beginTransaction for notes about how to use this and when transactions
     * are committed and rolled back.
     */
    public void endTransaction() {
        acquireReference();
        try {
            getThreadSession().endTransaction(null);
        } finally {
            releaseReference();
        }
    }

    /**
     * Marks the current transaction as successful. Do not do any more database work between
     * calling this and calling endTransaction. Do as little non-database work as possible in that
     * situation too. If any errors are encountered between this and endTransaction the transaction
     * will still be committed.
     *
     * @throws IllegalStateException if the current thread is not in a transaction or the
     * transaction is already marked as successful.
     */
    public void setTransactionSuccessful() {
        acquireReference();
        try {
            getThreadSession().setTransactionSuccessful();
        } finally {
            releaseReference();
        }
    }

    /**
     * Returns true if the current thread has a transaction pending.
     *
     * @return True if the current thread is in a transaction.
     */
    public boolean inTransaction() {
        acquireReference();
        try {
            return getThreadSession().hasTransaction();
        } finally {
            releaseReference();
        }
    }

    /**
     * Returns true if the current thread is holding an active connection to the database.
     * <p>
     * The name of this method comes from a time when having an active connection
     * to the database meant that the thread was holding an actual lock on the
     * database.  Nowadays, there is no longer a true "database lock" although threads
     * may block if they cannot acquire a database connection to perform a
     * particular operation.
     * </p>
     *
     * @return True if the current thread is holding an active connection to the database.
     */
    public boolean isDbLockedByCurrentThread() {
        acquireReference();
        try {
            return getThreadSession().hasConnection();
        } finally {
            releaseReference();
        }
    }

    /**
     * Always returns false.
     * <p>
     * There is no longer the concept of a database lock, so this method always returns false.
     * </p>
     *
     * @return False.
     * @deprecated Always returns false.  Do not use this method.
     */
    @Deprecated
    public boolean isDbLockedByOtherThreads() {
        return false;
    }

    /**
     * Temporarily end the transaction to let other threads run. The transaction is assumed to be
     * successful so far. Do not call setTransactionSuccessful before calling this. When this
     * returns a new transaction will have been created but not marked as successful.
     * @return true if the transaction was yielded
     * @deprecated if the db is locked more than once (becuase of nested transactions) then the lock
     *   will not be yielded. Use yieldIfContendedSafely instead.
     */
    @Deprecated
    public boolean yieldIfContended() {
        return yieldIfContendedHelper(false /* do not check yielding */,
                -1 /* sleepAfterYieldDelay */);
    }

    /**
     * Temporarily end the transaction to let other threads run. The transaction is assumed to be
     * successful so far. Do not call setTransactionSuccessful before calling this. When this
     * returns a new transaction will have been created but not marked as successful. This assumes
     * that there are no nested transactions (beginTransaction has only been called once) and will
     * throw an exception if that is not the case.
     * @return true if the transaction was yielded
     */
    public boolean yieldIfContendedSafely() {
        return yieldIfContendedHelper(true /* check yielding */, -1 /* sleepAfterYieldDelay*/);
    }

    /**
     * Temporarily end the transaction to let other threads run. The transaction is assumed to be
     * successful so far. Do not call setTransactionSuccessful before calling this. When this
     * returns a new transaction will have been created but not marked as successful. This assumes
     * that there are no nested transactions (beginTransaction has only been called once) and will
     * throw an exception if that is not the case.
     * @param sleepAfterYieldDelay if > 0, sleep this long before starting a new transaction if
     *   the lock was actually yielded. This will allow other background threads to make some
     *   more progress than they would if we started the transaction immediately.
     * @return true if the transaction was yielded
     */
    public boolean yieldIfContendedSafely(long sleepAfterYieldDelay) {
        return yieldIfContendedHelper(true /* check yielding */, sleepAfterYieldDelay);
    }

    private boolean yieldIfContendedHelper(boolean throwIfUnsafe, long sleepAfterYieldDelay) {
        acquireReference();
        try {
            return getThreadSession().yieldTransaction(sleepAfterYieldDelay, throwIfUnsafe, null);
        } finally {
            releaseReference();
        }
    }

    /**
     * Deprecated.
     * @deprecated This method no longer serves any useful purpose and has been deprecated.
     */
    @Deprecated
    public Map<String, String> getSyncedTables() {
        return new HashMap<String, String>(0);
    }

    /**
     * Open the database according to the flags {@link #OPEN_READWRITE}
     * {@link #OPEN_READONLY} {@link #CREATE_IF_NECESSARY} and/or {@link #NO_LOCALIZED_COLLATORS}.
     *
     * <p>Sets the locale of the database to the  the system's current locale.
     * Call {@link #setLocale} if you would like something else.</p>
     *
     * @param path to database file to open and/or create
     * @param factory an optional factory class that is called to instantiate a
     *            cursor when query is called, or null for default
     * @param flags to control database access mode
     * @return the newly opened database
     * @throws SQLiteException if the database cannot be opened
     */
    public static SQLiteDatabase openDatabase(String path, CursorFactory factory, int flags) {
        return openDatabase(path, factory, flags, null);
    }

    /**
     * Open the database according to the flags {@link #OPEN_READWRITE}
     * {@link #OPEN_READONLY} {@link #CREATE_IF_NECESSARY} and/or {@link #NO_LOCALIZED_COLLATORS}.
     *
     * <p>Sets the locale of the database to the  the system's current locale.
     * Call {@link #setLocale} if you would like something else.</p>
     *
     * <p>Accepts input param: a concrete instance of {@link DatabaseErrorHandler} to be
     * used to handle corruption when sqlite reports database corruption.</p>
     *
     * @param path to database file to open and/or create
     * @param factory an optional factory class that is called to instantiate a
     *            cursor when query is called, or null for default
     * @param flags to control database access mode
     * @param errorHandler the {@link DatabaseErrorHandler} obj to be used to handle corruption
     * when sqlite reports database corruption
     * @return the newly opened database
     * @throws SQLiteException if the database cannot be opened
     */
    public static SQLiteDatabase openDatabase(String path, CursorFactory factory, int flags,
            DatabaseErrorHandler errorHandler) {
        SQLiteDatabase db = new SQLiteDatabase(path, flags, factory, errorHandler);
        db.open();
        return db;
    }

    /**
     * Equivalent to openDatabase(file.getPath(), factory, CREATE_IF_NECESSARY).
     */
    public static SQLiteDatabase openOrCreateDatabase(File file, CursorFactory factory) {
        return openOrCreateDatabase(file.getPath(), factory);
    }

    /**
     * Equivalent to openDatabase(path, factory, CREATE_IF_NECESSARY).
     */
    public static SQLiteDatabase openOrCreateDatabase(String path, CursorFactory factory) {
        return openDatabase(path, factory, CREATE_IF_NECESSARY, null);
    }

    /**
     * Equivalent to openDatabase(path, factory, CREATE_IF_NECESSARY, errorHandler).
     */
    public static SQLiteDatabase openOrCreateDatabase(String path, CursorFactory factory,
            DatabaseErrorHandler errorHandler) {
        return openDatabase(path, factory, CREATE_IF_NECESSARY, errorHandler);
    }

    /**
     * Deletes a database including its journal file and other auxiliary files
     * that may have been created by the database engine.
     *
     * @param file The database file path.
     * @return True if the database was successfully deleted.
     */
    public static boolean deleteDatabase(File file) {
        if (file == null) {
            throw new IllegalArgumentException("file must not be null");
        }

        boolean deleted = false;
        deleted |= file.delete();
        deleted |= new File(file.getPath() + "-journal").delete();
        deleted |= new File(file.getPath() + "-shm").delete();
        deleted |= new File(file.getPath() + "-wal").delete();

        File dir = file.getParentFile();
        if (dir != null) {
            final String prefix = file.getName() + "-mj";
            final FileFilter filter = new FileFilter() {
                @Override
                public boolean accept(File candidate) {
                    return candidate.getName().startsWith(prefix);
                }
            };
            for (File masterJournal : dir.listFiles(filter)) {
                deleted |= masterJournal.delete();
            }
        }
        return deleted;
    }

    /**
     * Reopens the database in read-write mode.
     * If the database is already read-write, does nothing.
     *
     * @throws SQLiteException if the database could not be reopened as requested, in which
     * case it remains open in read only mode.
     * @throws IllegalStateException if the database is not open.
     *
     * @see #isReadOnly()
     * @hide
     */
    public void reopenReadWrite() {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            if (!isReadOnlyLocked()) {
                return; // nothing to do
            }

            // Reopen the database in read-write mode.
            final int oldOpenFlags = mConfigurationLocked.openFlags;
            mConfigurationLocked.openFlags = (mConfigurationLocked.openFlags & ~OPEN_READ_MASK)
                    | OPEN_READWRITE;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.openFlags = oldOpenFlags;
                throw ex;
            }
        }
    }

    private void open() {
        try {
            try {
                openInner();
            } catch (SQLiteDatabaseCorruptException ex) {
                onCorruption();
                openInner();
            }
        } catch (SQLiteException ex) {
            Log.e(TAG, "Failed to open database '" + getLabel() + "'.", ex);
            close();
            throw ex;
        }
    }

    private void openInner() {
        synchronized (mLock) {
            assert mConnectionPoolLocked == null;
            mConnectionPoolLocked = SQLiteConnectionPool.open(mConfigurationLocked);
            mCloseGuardLocked.open("close");
        }

        synchronized (sActiveDatabases) {
            sActiveDatabases.put(this, null);
        }
    }

    /**
     * Create a memory backed SQLite database.  Its contents will be destroyed
     * when the database is closed.
     *
     * <p>Sets the locale of the database to the  the system's current locale.
     * Call {@link #setLocale} if you would like something else.</p>
     *
     * @param factory an optional factory class that is called to instantiate a
     *            cursor when query is called
     * @return a SQLiteDatabase object, or null if the database can't be created
     */
    public static SQLiteDatabase create(CursorFactory factory) {
        // This is a magic string with special meaning for SQLite.
        return openDatabase(SQLiteDatabaseConfiguration.MEMORY_DB_PATH,
                factory, CREATE_IF_NECESSARY);
    }

    /**
     * Registers a CustomFunction callback as a function that can be called from
     * SQLite database triggers.
     *
     * @param name the name of the sqlite3 function
     * @param numArgs the number of arguments for the function
     * @param function callback to call when the function is executed
     * @hide
     */
    public void addCustomFunction(String name, int numArgs, CustomFunction function) {
        // Create wrapper (also validates arguments).
        SQLiteCustomFunction wrapper = new SQLiteCustomFunction(name, numArgs, function);

        synchronized (mLock) {
            throwIfNotOpenLocked();

            mConfigurationLocked.customFunctions.add(wrapper);
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.customFunctions.remove(wrapper);
                throw ex;
            }
        }
    }

    /**
     * Gets the database version.
     *
     * @return the database version
     */
    public int getVersion() {
        return ((Long) ExtraUtils.longForQuery(this, "PRAGMA user_version;", null)).intValue();
    }

    /**
     * Sets the database version.
     *
     * @param version the new database version
     */
    public void setVersion(int version) {
        execSQL("PRAGMA user_version = " + version);
    }

    /**
     * Returns the maximum size the database may grow to.
     *
     * @return the new maximum database size
     */
    public long getMaximumSize() {
        long pageCount = ExtraUtils.longForQuery(this, "PRAGMA max_page_count;", null);
        return pageCount * getPageSize();
    }

    /**
     * Sets the maximum size the database will grow to. The maximum size cannot
     * be set below the current size.
     *
     * @param numBytes the maximum database size, in bytes
     * @return the new maximum database size
     */
    public long setMaximumSize(long numBytes) {
        long pageSize = getPageSize();
        long numPages = numBytes / pageSize;
        // If numBytes isn't a multiple of pageSize, bump up a page
        if ((numBytes % pageSize) != 0) {
            numPages++;
        }
        long newPageCount = ExtraUtils.longForQuery(this, "PRAGMA max_page_count = " + numPages,
                null);
        return newPageCount * pageSize;
    }

    /**
     * Returns the current database page size, in bytes.
     *
     * @return the database page size, in bytes
     */
    public long getPageSize() {
        return ExtraUtils.longForQuery(this, "PRAGMA page_size;", null);
    }

    /**
     * Sets the database page size. The page size must be a power of two. This
     * method does not work if any data has been written to the database file,
     * and must be called right after the database has been created.
     *
     * @param numBytes the database page size, in bytes
     */
    public void setPageSize(long numBytes) {
        execSQL("PRAGMA page_size = " + numBytes);
    }

    /**
     * Mark this table as syncable. When an update occurs in this table the
     * _sync_dirty field will be set to ensure proper syncing operation.
     *
     * @param table the table to mark as syncable
     * @param deletedTable The deleted table that corresponds to the
     *          syncable table
     * @deprecated This method no longer serves any useful purpose and has been deprecated.
     */
    @Deprecated
    public void markTableSyncable(String table, String deletedTable) {
    }

    /**
     * Mark this table as syncable, with the _sync_dirty residing in another
     * table. When an update occurs in this table the _sync_dirty field of the
     * row in updateTable with the _id in foreignKey will be set to
     * ensure proper syncing operation.
     *
     * @param table an update on this table will trigger a sync time removal
     * @param foreignKey this is the column in table whose value is an _id in
     *          updateTable
     * @param updateTable this is the table that will have its _sync_dirty
     * @deprecated This method no longer serves any useful purpose and has been deprecated.
     */
    @Deprecated
    public void markTableSyncable(String table, String foreignKey, String updateTable) {
    }

    /**
     * Finds the name of the first table, which is editable.
     *
     * @param tables a list of tables
     * @return the first table listed
     */
    public static String findEditTable(String tables) {
        if (!TextUtils.isEmpty(tables)) {
            // find the first word terminated by either a space or a comma
            int spacepos = tables.indexOf(' ');
            int commapos = tables.indexOf(',');

            if (spacepos > 0 && (spacepos < commapos || commapos < 0)) {
                return tables.substring(0, spacepos);
            } else if (commapos > 0 && (commapos < spacepos || spacepos < 0) ) {
                return tables.substring(0, commapos);
            }
            return tables;
        } else {
            throw new IllegalStateException("Invalid tables");
        }
    }

    /**
     * Compiles an SQL statement into a reusable pre-compiled statement object.
     * The parameters are identical to {@link #execSQL(String)}. You may put ?s in the
     * statement and fill in those values with {@link SQLiteProgram#bindString}
     * and {@link SQLiteProgram#bindLong} each time you want to run the
     * statement. Statements may not return result sets larger than 1x1.
     *<p>
     * No two threads should be using the same {@link SQLiteStatement} at the same time.
     *
     * @param sql The raw SQL statement, may contain ? for unknown values to be
     *            bound later.
     * @return A pre-compiled {@link SQLiteStatement} object. Note that
     * {@link SQLiteStatement}s are not synchronized, see the documentation for more details.
     */
    public SQLiteStatement compileStatement(String sql) throws SQLException {
        acquireReference();
        try {
            return new SQLiteStatement(this, sql, null);
        } finally {
            releaseReference();
        }
    }

    /**
     * Query the given URL, returning a {@link Cursor} over the result set.
     *
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor query(boolean distinct, String table, String[] columns,
            String selection, String[] selectionArgs, String groupBy,
            String having, String orderBy, String limit) {
        return queryWithFactory(null, distinct, table, columns, selection, selectionArgs,
                groupBy, having, orderBy, limit, null);
    }

    /**
     * Query the given URL, returning a {@link Cursor} over the result set.
     *
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor query(boolean distinct, String table, String[] columns,
            String selection, String[] selectionArgs, String groupBy,
            String having, String orderBy, String limit, CancellationSignal cancellationSignal) {
        return queryWithFactory(null, distinct, table, columns, selection, selectionArgs,
                groupBy, having, orderBy, limit, cancellationSignal);
    }

    /**
     * Query the given URL, returning a {@link Cursor} over the result set.
     *
     * @param cursorFactory the cursor factory to use, or null for the default factory
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor queryWithFactory(CursorFactory cursorFactory,
            boolean distinct, String table, String[] columns,
            String selection, String[] selectionArgs, String groupBy,
            String having, String orderBy, String limit) {
        return queryWithFactory(cursorFactory, distinct, table, columns, selection,
                selectionArgs, groupBy, having, orderBy, limit, null);
    }

    /**
     * Query the given URL, returning a {@link Cursor} over the result set.
     *
     * @param cursorFactory the cursor factory to use, or null for the default factory
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor queryWithFactory(CursorFactory cursorFactory,
            boolean distinct, String table, String[] columns,
            String selection, String[] selectionArgs, String groupBy,
            String having, String orderBy, String limit, CancellationSignal cancellationSignal) {
        acquireReference();
        try {
            String sql = SQLiteQueryBuilder.buildQueryString(
                    distinct, table, columns, selection, groupBy, having, orderBy, limit);

            return rawQueryWithFactory(cursorFactory, sql, selectionArgs,
                    findEditTable(table), cancellationSignal);
        } finally {
            releaseReference();
        }
    }

    /**
     * Query the given table, returning a {@link Cursor} over the result set.
     *
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor query(String table, String[] columns, String selection,
            String[] selectionArgs, String groupBy, String having,
            String orderBy) {

        return query(false, table, columns, selection, selectionArgs, groupBy,
                having, orderBy, null /* limit */);
    }

    /**
     * Query the given table, returning a {@link Cursor} over the result set.
     *
     * @param table The table name to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return, formatted as an
     *            SQL WHERE clause (excluding the WHERE itself). Passing null
     *            will return all rows for the given table.
     * @param selectionArgs You may include ?s in selection, which will be
     *         replaced by the values from selectionArgs, in order that they
     *         appear in the selection. The values will be bound as Strings.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     * @see Cursor
     */
    public Cursor query(String table, String[] columns, String selection,
            String[] selectionArgs, String groupBy, String having,
            String orderBy, String limit) {

        return query(false, table, columns, selection, selectionArgs, groupBy,
                having, orderBy, limit);
    }

    /**
     * Runs the provided SQL and returns a {@link Cursor} over the result set.
     *
     * @param sql the SQL query. The SQL string must not be ; terminated
     * @param selectionArgs You may include ?s in where clause in the query,
     *     which will be replaced by the values from selectionArgs. The
     *     values will be bound as Strings.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     */
    public Cursor rawQuery(String sql, String[] selectionArgs) {
        return rawQueryWithFactory(null, sql, selectionArgs, null, null);
    }

    /**
     * Runs the provided SQL and returns a {@link Cursor} over the result set.
     *
     * @param sql the SQL query. The SQL string must not be ; terminated
     * @param selectionArgs You may include ?s in where clause in the query,
     *     which will be replaced by the values from selectionArgs. The
     *     values will be bound as Strings.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     */
    public Cursor rawQuery(String sql, String[] selectionArgs,
            CancellationSignal cancellationSignal) {
        return rawQueryWithFactory(null, sql, selectionArgs, null, cancellationSignal);
    }

    /**
     * Runs the provided SQL and returns a cursor over the result set.
     *
     * @param cursorFactory the cursor factory to use, or null for the default factory
     * @param sql the SQL query. The SQL string must not be ; terminated
     * @param selectionArgs You may include ?s in where clause in the query,
     *     which will be replaced by the values from selectionArgs. The
     *     values will be bound as Strings.
     * @param editTable the name of the first table, which is editable
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     */
    public Cursor rawQueryWithFactory(
            CursorFactory cursorFactory, String sql, String[] selectionArgs,
            String editTable) {
        return rawQueryWithFactory(cursorFactory, sql, selectionArgs, editTable, null);
    }

    /**
     * Runs the provided SQL and returns a cursor over the result set.
     *
     * @param cursorFactory the cursor factory to use, or null for the default factory
     * @param sql the SQL query. The SQL string must not be ; terminated
     * @param selectionArgs You may include ?s in where clause in the query,
     *     which will be replaced by the values from selectionArgs. The
     *     values will be bound as Strings.
     * @param editTable the name of the first table, which is editable
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return A {@link Cursor} object, which is positioned before the first entry. Note that
     * {@link Cursor}s are not synchronized, see the documentation for more details.
     */
    public Cursor rawQueryWithFactory(
            CursorFactory cursorFactory, String sql, String[] selectionArgs,
            String editTable, CancellationSignal cancellationSignal) {
        acquireReference();
        try {
            SQLiteCursorDriver driver = new SQLiteDirectCursorDriver(this, sql, editTable,
                    cancellationSignal);
            return driver.query(cursorFactory != null ? cursorFactory : mCursorFactory,
                    selectionArgs);
        } finally {
            releaseReference();
        }
    }

    /**
     * Convenience method for inserting a row into the database.
     *
     * @param table the table to insert the row into
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>values</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>values</code> is empty.
     * @param values this map contains the initial column values for the
     *            row. The keys should be the column names and the values the
     *            column values
     * @return the row ID of the newly inserted row, or -1 if an error occurred
     */
    public long insert(String table, String nullColumnHack, ContentValues values) {
        try {
            return insertWithOnConflict(table, nullColumnHack, values, CONFLICT_NONE);
        } catch (SQLException e) {
            Log.e(TAG, "Error inserting " + values, e);
            return -1;
        }
    }

    /**
     * Convenience method for inserting a row into the database.
     *
     * @param table the table to insert the row into
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>values</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>values</code> is empty.
     * @param values this map contains the initial column values for the
     *            row. The keys should be the column names and the values the
     *            column values
     * @throws SQLException
     * @return the row ID of the newly inserted row, or -1 if an error occurred
     */
    public long insertOrThrow(String table, String nullColumnHack, ContentValues values)
            throws SQLException {
        return insertWithOnConflict(table, nullColumnHack, values, CONFLICT_NONE);
    }

    /**
     * Convenience method for replacing a row in the database.
     *
     * @param table the table in which to replace the row
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>initialValues</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>initialValues</code> is empty.
     * @param initialValues this map contains the initial column values for
     *   the row.
     * @return the row ID of the newly inserted row, or -1 if an error occurred
     */
    public long replace(String table, String nullColumnHack, ContentValues initialValues) {
        try {
            return insertWithOnConflict(table, nullColumnHack, initialValues,
                    CONFLICT_REPLACE);
        } catch (SQLException e) {
            Log.e(TAG, "Error inserting " + initialValues, e);
            return -1;
        }
    }

    /**
     * Convenience method for replacing a row in the database.
     *
     * @param table the table in which to replace the row
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>initialValues</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>initialValues</code> is empty.
     * @param initialValues this map contains the initial column values for
     *   the row. The key
     * @throws SQLException
     * @return the row ID of the newly inserted row, or -1 if an error occurred
     */
    public long replaceOrThrow(String table, String nullColumnHack,
            ContentValues initialValues) throws SQLException {
        return insertWithOnConflict(table, nullColumnHack, initialValues,
                CONFLICT_REPLACE);
    }

    /**
     * General method for inserting a row into the database.
     *
     * @param table the table to insert the row into
     * @param nullColumnHack optional; may be <code>null</code>.
     *            SQL doesn't allow inserting a completely empty row without
     *            naming at least one column name.  If your provided <code>initialValues</code> is
     *            empty, no column names are known and an empty row can't be inserted.
     *            If not set to null, the <code>nullColumnHack</code> parameter
     *            provides the name of nullable column name to explicitly insert a NULL into
     *            in the case where your <code>initialValues</code> is empty.
     * @param initialValues this map contains the initial column values for the
     *            row. The keys should be the column names and the values the
     *            column values
     * @param conflictAlgorithm for insert conflict resolver
     * @return the row ID of the newly inserted row
     * OR the primary key of the existing row if the input param 'conflictAlgorithm' =
     * {@link #CONFLICT_IGNORE}
     * OR -1 if any error
     */
    public long insertWithOnConflict(String table, String nullColumnHack,
            ContentValues initialValues, int conflictAlgorithm) {
        acquireReference();
        try {
            StringBuilder sql = new StringBuilder();
            sql.append("INSERT");
            sql.append(CONFLICT_VALUES[conflictAlgorithm]);
            sql.append(" INTO ");
            sql.append(table);
            sql.append('(');

            Object[] bindArgs = null;
            int size = (initialValues != null && initialValues.size() > 0)
                    ? initialValues.size() : 0;
            if (size > 0) {
                bindArgs = new Object[size];
                int i = 0;
                for (String colName : initialValues.keySet()) {
                    sql.append((i > 0) ? "," : "");
                    sql.append(colName);
                    bindArgs[i++] = initialValues.get(colName);
                }
                sql.append(')');
                sql.append(" VALUES (");
                for (i = 0; i < size; i++) {
                    sql.append((i > 0) ? ",?" : "?");
                }
            } else {
                sql.append(nullColumnHack + ") VALUES (NULL");
            }
            sql.append(')');

            SQLiteStatement statement = new SQLiteStatement(this, sql.toString(), bindArgs);
            try {
                return statement.executeInsert();
            } finally {
                statement.close();
            }
        } finally {
            releaseReference();
        }
    }

    /**
     * Convenience method for deleting rows in the database.
     *
     * @param table the table to delete from
     * @param whereClause the optional WHERE clause to apply when deleting.
     *            Passing null will delete all rows.
     * @param whereArgs You may include ?s in the where clause, which
     *            will be replaced by the values from whereArgs. The values
     *            will be bound as Strings.
     * @return the number of rows affected if a whereClause is passed in, 0
     *         otherwise. To remove all rows and get a count pass "1" as the
     *         whereClause.
     */
    public int delete(String table, String whereClause, String[] whereArgs) {
        acquireReference();
        try {
            SQLiteStatement statement =  new SQLiteStatement(this, "DELETE FROM " + table +
                    (!TextUtils.isEmpty(whereClause) ? " WHERE " + whereClause : ""), whereArgs);
            try {
                return statement.executeUpdateDelete();
            } finally {
                statement.close();
            }
        } finally {
            releaseReference();
        }
    }

    /**
     * Convenience method for updating rows in the database.
     *
     * @param table the table to update in
     * @param values a map from column names to new column values. null is a
     *            valid value that will be translated to NULL.
     * @param whereClause the optional WHERE clause to apply when updating.
     *            Passing null will update all rows.
     * @param whereArgs You may include ?s in the where clause, which
     *            will be replaced by the values from whereArgs. The values
     *            will be bound as Strings.
     * @return the number of rows affected
     */
    public int update(String table, ContentValues values, String whereClause, String[] whereArgs) {
        return updateWithOnConflict(table, values, whereClause, whereArgs, CONFLICT_NONE);
    }

    /**
     * Convenience method for updating rows in the database.
     *
     * @param table the table to update in
     * @param values a map from column names to new column values. null is a
     *            valid value that will be translated to NULL.
     * @param whereClause the optional WHERE clause to apply when updating.
     *            Passing null will update all rows.
     * @param whereArgs You may include ?s in the where clause, which
     *            will be replaced by the values from whereArgs. The values
     *            will be bound as Strings.
     * @param conflictAlgorithm for update conflict resolver
     * @return the number of rows affected
     */
    public int updateWithOnConflict(String table, ContentValues values,
            String whereClause, String[] whereArgs, int conflictAlgorithm) {
        if (values == null || values.size() == 0) {
            throw new IllegalArgumentException("Empty values");
        }

        acquireReference();
        try {
            StringBuilder sql = new StringBuilder(120);
            sql.append("UPDATE ");
            sql.append(CONFLICT_VALUES[conflictAlgorithm]);
            sql.append(table);
            sql.append(" SET ");

            // move all bind args to one array
            int setValuesSize = values.size();
            int bindArgsSize = (whereArgs == null) ? setValuesSize : (setValuesSize + whereArgs.length);
            Object[] bindArgs = new Object[bindArgsSize];
            int i = 0;
            for (String colName : values.keySet()) {
                sql.append((i > 0) ? "," : "");
                sql.append(colName);
                bindArgs[i++] = values.get(colName);
                sql.append("=?");
            }
            if (whereArgs != null) {
                for (i = setValuesSize; i < bindArgsSize; i++) {
                    bindArgs[i] = whereArgs[i - setValuesSize];
                }
            }
            if (!TextUtils.isEmpty(whereClause)) {
                sql.append(" WHERE ");
                sql.append(whereClause);
            }

            SQLiteStatement statement = new SQLiteStatement(this, sql.toString(), bindArgs);
            try {
                return statement.executeUpdateDelete();
            } finally {
                statement.close();
            }
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute a single SQL statement that is NOT a SELECT
     * or any other SQL statement that returns data.
     * <p>
     * It has no means to return any data (such as the number of affected rows).
     * Instead, you're encouraged to use {@link #insert(String, String, ContentValues)},
     * {@link #update(String, ContentValues, String, String[])}, et al, when possible.
     * </p>
     * <p>
     * When using {@link #enableWriteAheadLogging()}, journal_mode is
     * automatically managed by this class. So, do not set journal_mode
     * using "PRAGMA journal_mode'<value>" statement if your app is using
     * {@link #enableWriteAheadLogging()}
     * </p>
     *
     * @param sql the SQL statement to be executed. Multiple statements separated by semicolons are
     * not supported.
     * @throws SQLException if the SQL string is invalid
     */
    public void execSQL(String sql) throws SQLException {
        executeSql(sql, null);
    }

    /**
     * Execute a single SQL statement that is NOT a SELECT/INSERT/UPDATE/DELETE.
     * <p>
     * For INSERT statements, use any of the following instead.
     * <ul>
     *   <li>{@link #insert(String, String, ContentValues)}</li>
     *   <li>{@link #insertOrThrow(String, String, ContentValues)}</li>
     *   <li>{@link #insertWithOnConflict(String, String, ContentValues, int)}</li>
     * </ul>
     * <p>
     * For UPDATE statements, use any of the following instead.
     * <ul>
     *   <li>{@link #update(String, ContentValues, String, String[])}</li>
     *   <li>{@link #updateWithOnConflict(String, ContentValues, String, String[], int)}</li>
     * </ul>
     * <p>
     * For DELETE statements, use any of the following instead.
     * <ul>
     *   <li>{@link #delete(String, String, String[])}</li>
     * </ul>
     * <p>
     * For example, the following are good candidates for using this method:
     * <ul>
     *   <li>ALTER TABLE</li>
     *   <li>CREATE or DROP table / trigger / view / index / virtual table</li>
     *   <li>REINDEX</li>
     *   <li>RELEASE</li>
     *   <li>SAVEPOINT</li>
     *   <li>PRAGMA that returns no data</li>
     * </ul>
     * </p>
     * <p>
     * When using {@link #enableWriteAheadLogging()}, journal_mode is
     * automatically managed by this class. So, do not set journal_mode
     * using "PRAGMA journal_mode'<value>" statement if your app is using
     * {@link #enableWriteAheadLogging()}
     * </p>
     *
     * @param sql the SQL statement to be executed. Multiple statements separated by semicolons are
     * not supported.
     * @param bindArgs only byte[], String, Long and Double are supported in bindArgs.
     * @throws SQLException if the SQL string is invalid
     */
    public void execSQL(String sql, Object[] bindArgs) throws SQLException {
        if (bindArgs == null) {
            throw new IllegalArgumentException("Empty bindArgs");
        }
        executeSql(sql, bindArgs);
    }

    private int executeSql(String sql, Object[] bindArgs) throws SQLException {
        acquireReference();
        try {
            if (DatabaseUtils.getSqlStatementType(sql) == DatabaseUtils.STATEMENT_ATTACH) {
                boolean disableWal = false;
                synchronized (mLock) {
                    if (!mHasAttachedDbsLocked) {
                        mHasAttachedDbsLocked = true;
                        disableWal = true;
                    }
                }
                if (disableWal) {
                    disableWriteAheadLogging();
                }
            }

            SQLiteStatement statement = new SQLiteStatement(this, sql, bindArgs);
            try {
                return statement.executeUpdateDelete();
            } finally {
                statement.close();
            }
        } finally {
            releaseReference();
        }
    }

    /**
     * Returns true if the database is opened as read only.
     *
     * @return True if database is opened as read only.
     */
    public boolean isReadOnly() {
        synchronized (mLock) {
            return isReadOnlyLocked();
        }
    }

    private boolean isReadOnlyLocked() {
        return (mConfigurationLocked.openFlags & OPEN_READ_MASK) == OPEN_READONLY;
    }

    /**
     * Returns true if the database is in-memory db.
     *
     * @return True if the database is in-memory.
     * @hide
     */
    public boolean isInMemoryDatabase() {
        synchronized (mLock) {
            return mConfigurationLocked.isInMemoryDb();
        }
    }

    /**
     * Returns true if the database is currently open.
     *
     * @return True if the database is currently open (has not been closed).
     */
    public boolean isOpen() {
        synchronized (mLock) {
            return mConnectionPoolLocked != null;
        }
    }

    /**
     * Returns true if the new version code is greater than the current database version.
     *
     * @param newVersion The new version code.
     * @return True if the new version code is greater than the current database version. 
     */
    public boolean needUpgrade(int newVersion) {
        return newVersion > getVersion();
    }

    /**
     * Gets the path to the database file.
     *
     * @return The path to the database file.
     */
    public final String getPath() {
        synchronized (mLock) {
            return mConfigurationLocked.path;
        }
    }

    /**
     * Sets the locale for this database.  Does nothing if this database has
     * the {@link #NO_LOCALIZED_COLLATORS} flag set or was opened read only.
     *
     * @param locale The new locale.
     *
     * @throws SQLException if the locale could not be set.  The most common reason
     * for this is that there is no collator available for the locale you requested.
     * In this case the database remains unchanged.
     */
    public void setLocale(Locale locale) {
        if (locale == null) {
            throw new IllegalArgumentException("locale must not be null.");
        }

        synchronized (mLock) {
            throwIfNotOpenLocked();

            final Locale oldLocale = mConfigurationLocked.locale;
            mConfigurationLocked.locale = locale;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.locale = oldLocale;
                throw ex;
            }
        }
    }

    /**
     * Sets the maximum size of the prepared-statement cache for this database.
     * (size of the cache = number of compiled-sql-statements stored in the cache).
     *<p>
     * Maximum cache size can ONLY be increased from its current size (default = 10).
     * If this method is called with smaller size than the current maximum value,
     * then IllegalStateException is thrown.
     *<p>
     * This method is thread-safe.
     *
     * @param cacheSize the size of the cache. can be (0 to {@link #MAX_SQL_CACHE_SIZE})
     * @throws IllegalStateException if input cacheSize > {@link #MAX_SQL_CACHE_SIZE}.
     */
    public void setMaxSqlCacheSize(int cacheSize) {
        if (cacheSize > MAX_SQL_CACHE_SIZE || cacheSize < 0) {
            throw new IllegalStateException(
                    "expected value between 0 and " + MAX_SQL_CACHE_SIZE);
        }

        synchronized (mLock) {
            throwIfNotOpenLocked();

            final int oldMaxSqlCacheSize = mConfigurationLocked.maxSqlCacheSize;
            mConfigurationLocked.maxSqlCacheSize = cacheSize;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.maxSqlCacheSize = oldMaxSqlCacheSize;
                throw ex;
            }
        }
    }

    /**
     * Sets whether foreign key constraints are enabled for the database.
     * <p>
     * By default, foreign key constraints are not enforced by the database.
     * This method allows an application to enable foreign key constraints.
     * It must be called each time the database is opened to ensure that foreign
     * key constraints are enabled for the session.
     * </p><p>
     * A good time to call this method is right after calling {@link #openOrCreateDatabase}
     * or in the {@link SQLiteOpenHelper#onConfigure} callback.
     * </p><p>
     * When foreign key constraints are disabled, the database does not check whether
     * changes to the database will violate foreign key constraints.  Likewise, when
     * foreign key constraints are disabled, the database will not execute cascade
     * delete or update triggers.  As a result, it is possible for the database
     * state to become inconsistent.  To perform a database integrity check,
     * call {@link #isDatabaseIntegrityOk}.
     * </p><p>
     * This method must not be called while a transaction is in progress.
     * </p><p>
     * See also <a href="http://sqlite.org/foreignkeys.html">SQLite Foreign Key Constraints</a>
     * for more details about foreign key constraint support.
     * </p>
     *
     * @param enable True to enable foreign key constraints, false to disable them.
     *
     * @throws IllegalStateException if the are transactions is in progress
     * when this method is called.
     */
    public void setForeignKeyConstraintsEnabled(boolean enable) {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            if (mConfigurationLocked.foreignKeyConstraintsEnabled == enable) {
                return;
            }

            mConfigurationLocked.foreignKeyConstraintsEnabled = enable;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.foreignKeyConstraintsEnabled = !enable;
                throw ex;
            }
        }
    }

    /**
     * This method enables parallel execution of queries from multiple threads on the
     * same database.  It does this by opening multiple connections to the database
     * and using a different database connection for each query.  The database
     * journal mode is also changed to enable writes to proceed concurrently with reads.
     * <p>
     * When write-ahead logging is not enabled (the default), it is not possible for
     * reads and writes to occur on the database at the same time.  Before modifying the
     * database, the writer implicitly acquires an exclusive lock on the database which
     * prevents readers from accessing the database until the write is completed.
     * </p><p>
     * In contrast, when write-ahead logging is enabled (by calling this method), write
     * operations occur in a separate log file which allows reads to proceed concurrently.
     * While a write is in progress, readers on other threads will perceive the state
     * of the database as it was before the write began.  When the write completes, readers
     * on other threads will then perceive the new state of the database.
     * </p><p>
     * It is a good idea to enable write-ahead logging whenever a database will be
     * concurrently accessed and modified by multiple threads at the same time.
     * However, write-ahead logging uses significantly more memory than ordinary
     * journaling because there are multiple connections to the same database.
     * So if a database will only be used by a single thread, or if optimizing
     * concurrency is not very important, then write-ahead logging should be disabled.
     * </p><p>
     * After calling this method, execution of queries in parallel is enabled as long as
     * the database remains open.  To disable execution of queries in parallel, either
     * call {@link #disableWriteAheadLogging} or close the database and reopen it.
     * </p><p>
     * The maximum number of connections used to execute queries in parallel is
     * dependent upon the device memory and possibly other properties.
     * </p><p>
     * If a query is part of a transaction, then it is executed on the same database handle the
     * transaction was begun.
     * </p><p>
     * Writers should use {@link #beginTransactionNonExclusive()} or
     * {@link #beginTransactionWithListenerNonExclusive(SQLiteTransactionListener)}
     * to start a transaction.  Non-exclusive mode allows database file to be in readable
     * by other threads executing queries.
     * </p><p>
     * If the database has any attached databases, then execution of queries in parallel is NOT
     * possible.  Likewise, write-ahead logging is not supported for read-only databases
     * or memory databases.  In such cases, {@link #enableWriteAheadLogging} returns false.
     * </p><p>
     * The best way to enable write-ahead logging is to pass the
     * {@link #ENABLE_WRITE_AHEAD_LOGGING} flag to {@link #openDatabase}.  This is
     * more efficient than calling {@link #enableWriteAheadLogging}.
     * <code><pre>
     *     SQLiteDatabase db = SQLiteDatabase.openDatabase("db_filename", cursorFactory,
     *             SQLiteDatabase.CREATE_IF_NECESSARY | SQLiteDatabase.ENABLE_WRITE_AHEAD_LOGGING,
     *             myDatabaseErrorHandler);
     *     db.enableWriteAheadLogging();
     * </pre></code>
     * </p><p>
     * Another way to enable write-ahead logging is to call {@link #enableWriteAheadLogging}
     * after opening the database.
     * <code><pre>
     *     SQLiteDatabase db = SQLiteDatabase.openDatabase("db_filename", cursorFactory,
     *             SQLiteDatabase.CREATE_IF_NECESSARY, myDatabaseErrorHandler);
     *     db.enableWriteAheadLogging();
     * </pre></code>
     * </p><p>
     * See also <a href="http://sqlite.org/wal.html">SQLite Write-Ahead Logging</a> for
     * more details about how write-ahead logging works.
     * </p>
     *
     * @return True if write-ahead logging is enabled.
     *
     * @throws IllegalStateException if there are transactions in progress at the
     * time this method is called.  WAL mode can only be changed when there are no
     * transactions in progress.
     *
     * @see #ENABLE_WRITE_AHEAD_LOGGING
     * @see #disableWriteAheadLogging
     */
    public boolean enableWriteAheadLogging() {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            if ((mConfigurationLocked.openFlags & ENABLE_WRITE_AHEAD_LOGGING) != 0) {
                return true;
            }

            if (isReadOnlyLocked()) {
                // WAL doesn't make sense for readonly-databases.
                // TODO: True, but connection pooling does still make sense...
                return false;
            }

            if (mConfigurationLocked.isInMemoryDb()) {
                Log.i(TAG, "can't enable WAL for memory databases.");
                return false;
            }

            // make sure this database has NO attached databases because sqlite's write-ahead-logging
            // doesn't work for databases with attached databases
            if (mHasAttachedDbsLocked) {
                if (Log.isLoggable(TAG, Log.DEBUG)) {
                    Log.d(TAG, "this database: " + mConfigurationLocked.label
                            + " has attached databases. can't  enable WAL.");
                }
                return false;
            }

            mConfigurationLocked.openFlags |= ENABLE_WRITE_AHEAD_LOGGING;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.openFlags &= ~ENABLE_WRITE_AHEAD_LOGGING;
                throw ex;
            }
        }
        return true;
    }

    /**
     * This method disables the features enabled by {@link #enableWriteAheadLogging()}.
     *
     * @throws IllegalStateException if there are transactions in progress at the
     * time this method is called.  WAL mode can only be changed when there are no
     * transactions in progress.
     *
     * @see #enableWriteAheadLogging
     */
    public void disableWriteAheadLogging() {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            if ((mConfigurationLocked.openFlags & ENABLE_WRITE_AHEAD_LOGGING) == 0) {
                return;
            }

            mConfigurationLocked.openFlags &= ~ENABLE_WRITE_AHEAD_LOGGING;
            try {
                mConnectionPoolLocked.reconfigure(mConfigurationLocked);
            } catch (RuntimeException ex) {
                mConfigurationLocked.openFlags |= ENABLE_WRITE_AHEAD_LOGGING;
                throw ex;
            }
        }
    }

    /**
     * Returns true if write-ahead logging has been enabled for this database.
     *
     * @return True if write-ahead logging has been enabled for this database.
     *
     * @see #enableWriteAheadLogging
     * @see #ENABLE_WRITE_AHEAD_LOGGING
     */
    public boolean isWriteAheadLoggingEnabled() {
        synchronized (mLock) {
            throwIfNotOpenLocked();

            return (mConfigurationLocked.openFlags & ENABLE_WRITE_AHEAD_LOGGING) != 0;
        }
    }

    /**
     * Collect statistics about all open databases in the current process.
     * Used by bug report.
     */
    static ArrayList<DbStats> getDbStats() {
        ArrayList<DbStats> dbStatsList = new ArrayList<DbStats>();
        for (SQLiteDatabase db : getActiveDatabases()) {
            db.collectDbStats(dbStatsList);
        }
        return dbStatsList;
    }

    private void collectDbStats(ArrayList<DbStats> dbStatsList) {
        synchronized (mLock) {
            if (mConnectionPoolLocked != null) {
                mConnectionPoolLocked.collectDbStats(dbStatsList);
            }
        }
    }

    private static ArrayList<SQLiteDatabase> getActiveDatabases() {
        ArrayList<SQLiteDatabase> databases = new ArrayList<SQLiteDatabase>();
        synchronized (sActiveDatabases) {
            databases.addAll(sActiveDatabases.keySet());
        }
        return databases;
    }

    /**
     * Dump detailed information about all open databases in the current process.
     * Used by bug report.
     */
    static void dumpAll(Printer printer, boolean verbose) {
        for (SQLiteDatabase db : getActiveDatabases()) {
            db.dump(printer, verbose);
        }
    }

    private void dump(Printer printer, boolean verbose) {
        synchronized (mLock) {
            if (mConnectionPoolLocked != null) {
                printer.println("");
                mConnectionPoolLocked.dump(printer, verbose);
            }
        }
    }

    /**
     * Returns list of full pathnames of all attached databases including the main database
     * by executing 'pragma database_list' on the database.
     *
     * @return ArrayList of pairs of (database name, database file path) or null if the database
     * is not open.
     */
    public List<Pair<String, String>> getAttachedDbs() {
        ArrayList<Pair<String, String>> attachedDbs = new ArrayList<Pair<String, String>>();
        synchronized (mLock) {
            if (mConnectionPoolLocked == null) {
                return null; // not open
            }

            if (!mHasAttachedDbsLocked) {
                // No attached databases.
                // There is a small window where attached databases exist but this flag is not
                // set yet.  This can occur when this thread is in a race condition with another
                // thread that is executing the SQL statement: "attach database <blah> as <foo>"
                // If this thread is NOT ok with such a race condition (and thus possibly not
                // receivethe entire list of attached databases), then the caller should ensure
                // that no thread is executing any SQL statements while a thread is calling this
                // method.  Typically, this method is called when 'adb bugreport' is done or the
                // caller wants to collect stats on the database and all its attached databases.
                attachedDbs.add(new Pair<String, String>("main", mConfigurationLocked.path));
                return attachedDbs;
            }

            acquireReference();
        }

        try {
            // has attached databases. query sqlite to get the list of attached databases.
            Cursor c = null;
            try {
                c = rawQuery("pragma database_list;", null);
                while (c.moveToNext()) {
                    // sqlite returns a row for each database in the returned list of databases.
                    //   in each row,
                    //       1st column is the database name such as main, or the database
                    //                              name specified on the "ATTACH" command
                    //       2nd column is the database file path.
                    attachedDbs.add(new Pair<String, String>(c.getString(1), c.getString(2)));
                }
            } finally {
                if (c != null) {
                    c.close();
                }
            }
            return attachedDbs;
        } finally {
            releaseReference();
        }
    }

    /**
     * Runs 'pragma integrity_check' on the given database (and all the attached databases)
     * and returns true if the given database (and all its attached databases) pass integrity_check,
     * false otherwise.
     *<p>
     * If the result is false, then this method logs the errors reported by the integrity_check
     * command execution.
     *<p>
     * Note that 'pragma integrity_check' on a database can take a long time.
     *
     * @return true if the given database (and all its attached databases) pass integrity_check,
     * false otherwise.
     */
    public boolean isDatabaseIntegrityOk() {
        acquireReference();
        try {
            List<Pair<String, String>> attachedDbs = null;
            try {
                attachedDbs = getAttachedDbs();
                if (attachedDbs == null) {
                    throw new IllegalStateException("databaselist for: " + getPath() + " couldn't " +
                            "be retrieved. probably because the database is closed");
                }
            } catch (SQLiteException e) {
                // can't get attachedDb list. do integrity check on the main database
                attachedDbs = new ArrayList<Pair<String, String>>();
                attachedDbs.add(new Pair<String, String>("main", getPath()));
            }

            for (int i = 0; i < attachedDbs.size(); i++) {
                Pair<String, String> p = attachedDbs.get(i);
                SQLiteStatement prog = null;
                try {
                    prog = compileStatement("PRAGMA " + p.first + ".integrity_check(1);");
                    String rslt = prog.simpleQueryForString();
                    if (!rslt.equalsIgnoreCase("ok")) {
                        // integrity_checker failed on main or attached databases
                        Log.e(TAG, "PRAGMA integrity_check on " + p.second + " returned: " + rslt);
                        return false;
                    }
                } finally {
                    if (prog != null) prog.close();
                }
            }
        } finally {
            releaseReference();
        }
        return true;
    }

    @Override
    public String toString() {
        return "SQLiteDatabase: " + getPath();
    }

    private void throwIfNotOpenLocked() {
        if (mConnectionPoolLocked == null) {
            throw new IllegalStateException("The database '" + mConfigurationLocked.label
                    + "' is not open.");
        }
    }

    /**
     * Used to allow returning sub-classes of {@link Cursor} when calling query.
     */
    public interface CursorFactory {
        /**
         * See {@link SQLiteCursor#SQLiteCursor(SQLiteCursorDriver, String, SQLiteQuery)}.
         */
        public Cursor newCursor(SQLiteDatabase db,
                SQLiteCursorDriver masterQuery, String editTable,
                SQLiteQuery query);
    }

    /**
     * A callback interface for a custom sqlite3 function.
     * This can be used to create a function that can be called from
     * sqlite3 database triggers.
     * @hide
     */
    public interface CustomFunction {
        public void callback(String[] args);
    }

    public static boolean hasCodec() {
      return SQLiteConnection.hasCodec();
    }

    public void enableLocalizedCollators() {
      mConnectionPoolLocked.enableLocalizedCollators();
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDatabaseConfiguration.java.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import java.util.ArrayList;
import java.util.Locale;
import java.util.regex.Pattern;

/**
 * Describes how to configure a database.
 * <p>
 * The purpose of this object is to keep track of all of the little
 * configuration settings that are applied to a database after it
 * is opened so that they can be applied to all connections in the
 * connection pool uniformly.
 * </p><p>
 * Each connection maintains its own copy of this object so it can
 * keep track of which settings have already been applied.
 * </p>
 *
 * @hide
 */
public final class SQLiteDatabaseConfiguration {
    // The pattern we use to strip email addresses from database paths
    // when constructing a label to use in log messages.
    private static final Pattern EMAIL_IN_DB_PATTERN =
            Pattern.compile("[\\w\\.\\-]+@[\\w\\.\\-]+");

    /**
     * Special path used by in-memory databases.
     */
    public static final String MEMORY_DB_PATH = ":memory:";

    /**
     * The database path.
     */
    public final String path;

    /**
     * The label to use to describe the database when it appears in logs.
     * This is derived from the path but is stripped to remove PII.
     */
    public final String label;

    /**
     * The flags used to open the database.
     */
    public int openFlags;

    /**
     * The maximum size of the prepared statement cache for each database connection.
     * Must be non-negative.
     *
     * Default is 25.
     */
    public int maxSqlCacheSize;

    /**
     * The database locale.
     *
     * Default is the value returned by {@link Locale#getDefault()}.
     */
    public Locale locale;

    /**
     * True if foreign key constraints are enabled.
     *
     * Default is false.
     */
    public boolean foreignKeyConstraintsEnabled;

    /**
     * The custom functions to register.
     */
    public final ArrayList<SQLiteCustomFunction> customFunctions =
            new ArrayList<SQLiteCustomFunction>();

    /**
     * Creates a database configuration with the required parameters for opening a
     * database and default values for all other parameters.
     *
     * @param path The database path.
     * @param openFlags Open flags for the database, such as {@link SQLiteDatabase#OPEN_READWRITE}.
     */
    public SQLiteDatabaseConfiguration(String path, int openFlags) {
        if (path == null) {
            throw new IllegalArgumentException("path must not be null.");
        }

        this.path = path;
        label = stripPathForLogs(path);
        this.openFlags = openFlags;

        // Set default values for optional parameters.
        maxSqlCacheSize = 25;
        locale = Locale.getDefault();
    }

    /**
     * Creates a database configuration as a copy of another configuration.
     *
     * @param other The other configuration.
     */
    public SQLiteDatabaseConfiguration(SQLiteDatabaseConfiguration other) {
        if (other == null) {
            throw new IllegalArgumentException("other must not be null.");
        }

        this.path = other.path;
        this.label = other.label;
        updateParametersFrom(other);
    }

    /**
     * Updates the non-immutable parameters of this configuration object
     * from the other configuration object.
     *
     * @param other The object from which to copy the parameters.
     */
    public void updateParametersFrom(SQLiteDatabaseConfiguration other) {
        if (other == null) {
            throw new IllegalArgumentException("other must not be null.");
        }
        if (!path.equals(other.path)) {
            throw new IllegalArgumentException("other configuration must refer to "
                    + "the same database.");
        }

        openFlags = other.openFlags;
        maxSqlCacheSize = other.maxSqlCacheSize;
        locale = other.locale;
        foreignKeyConstraintsEnabled = other.foreignKeyConstraintsEnabled;
        customFunctions.clear();
        customFunctions.addAll(other.customFunctions);
    }

    /**
     * Returns true if the database is in-memory.
     * @return True if the database is in-memory.
     */
    public boolean isInMemoryDb() {
        return path.equalsIgnoreCase(MEMORY_DB_PATH);
    }

    private static String stripPathForLogs(String path) {
        if (path.indexOf('@') == -1) {
            return path;
        }
        return EMAIL_IN_DB_PATTERN.matcher(path).replaceAll("XX@YY");
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDatabaseCorruptException.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that the SQLite database file is corrupt.
 */
public class SQLiteDatabaseCorruptException extends SQLiteException {
    public SQLiteDatabaseCorruptException() {}

    public SQLiteDatabaseCorruptException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDatabaseLockedException.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * Thrown if  the database engine was unable to acquire the
 * database locks it needs to do its job.  If the statement is a [COMMIT]
 * or occurs outside of an explicit transaction, then you can retry the
 * statement.  If the statement is not a [COMMIT] and occurs within a
 * explicit transaction then you should rollback the transaction before
 * continuing.
 */
public class SQLiteDatabaseLockedException extends SQLiteException {
    public SQLiteDatabaseLockedException() {}

    public SQLiteDatabaseLockedException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDatatypeMismatchException.java.





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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

public class SQLiteDatatypeMismatchException extends SQLiteException {
    public SQLiteDatatypeMismatchException() {}

    public SQLiteDatatypeMismatchException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDebug.java.





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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import java.util.ArrayList;

import android.os.Build;
/* import android.os.SystemProperties; */
import android.util.Log;
import android.util.Printer;

/**
 * Provides debugging info about all SQLite databases running in the current process.
 *
 * {@hide}
 */
public final class SQLiteDebug {
    private static native void nativeGetPagerStats(PagerStats stats);

    /**
     * Controls the printing of informational SQL log messages.
     *
     * Enable using "adb shell setprop log.tag.SQLiteLog VERBOSE".
     */
    public static final boolean DEBUG_SQL_LOG =
            Log.isLoggable("SQLiteLog", Log.VERBOSE);

    /**
     * Controls the printing of SQL statements as they are executed.
     *
     * Enable using "adb shell setprop log.tag.SQLiteStatements VERBOSE".
     */
    public static final boolean DEBUG_SQL_STATEMENTS =
            Log.isLoggable("SQLiteStatements", Log.VERBOSE);

    /**
     * Controls the printing of wall-clock time taken to execute SQL statements
     * as they are executed.
     *
     * Enable using "adb shell setprop log.tag.SQLiteTime VERBOSE".
     */
    public static final boolean DEBUG_SQL_TIME =
            Log.isLoggable("SQLiteTime", Log.VERBOSE);

    /**
     * True to enable database performance testing instrumentation.
     * @hide
     */
    public static final boolean DEBUG_LOG_SLOW_QUERIES = false;

    private SQLiteDebug() {
    }

    /**
     * Determines whether a query should be logged.
     *
     * Reads the "db.log.slow_query_threshold" system property, which can be changed
     * by the user at any time.  If the value is zero, then all queries will
     * be considered slow.  If the value does not exist or is negative, then no queries will
     * be considered slow.
     *
     * This value can be changed dynamically while the system is running.
     * For example, "adb shell setprop db.log.slow_query_threshold 200" will
     * log all queries that take 200ms or longer to run.
     * @hide
     */
    public static final boolean shouldLogSlowQuery(long elapsedTimeMillis) {
        int slowQueryMillis = 10000;
        return slowQueryMillis >= 0 && elapsedTimeMillis >= slowQueryMillis;
    }

    /**
     * Contains statistics about the active pagers in the current process.
     *
     * @see #nativeGetPagerStats(PagerStats)
     */
    public static class PagerStats {
        /** the current amount of memory checked out by sqlite using sqlite3_malloc().
         * documented at http://www.sqlite.org/c3ref/c_status_malloc_size.html
         */
        public int memoryUsed;

        /** the number of bytes of page cache allocation which could not be sattisfied by the
         * SQLITE_CONFIG_PAGECACHE buffer and where forced to overflow to sqlite3_malloc().
         * The returned value includes allocations that overflowed because they where too large
         * (they were larger than the "sz" parameter to SQLITE_CONFIG_PAGECACHE) and allocations
         * that overflowed because no space was left in the page cache.
         * documented at http://www.sqlite.org/c3ref/c_status_malloc_size.html
         */
        public int pageCacheOverflow;

        /** records the largest memory allocation request handed to sqlite3.
         * documented at http://www.sqlite.org/c3ref/c_status_malloc_size.html
         */
        public int largestMemAlloc;

        /** a list of {@link DbStats} - one for each main database opened by the applications
         * running on the android device
         */
        public ArrayList<DbStats> dbStats;
    }

    /**
     * contains statistics about a database
     */
    public static class DbStats {
        /** name of the database */
        public String dbName;

        /** the page size for the database */
        public long pageSize;

        /** the database size */
        public long dbSize;

        /** documented here http://www.sqlite.org/c3ref/c_dbstatus_lookaside_used.html */
        public int lookaside;

        /** statement cache stats: hits/misses/cachesize */
        public String cache;

        public DbStats(String dbName, long pageCount, long pageSize, int lookaside,
            int hits, int misses, int cachesize) {
            this.dbName = dbName;
            this.pageSize = pageSize / 1024;
            dbSize = (pageCount * pageSize) / 1024;
            this.lookaside = lookaside;
            this.cache = hits + "/" + misses + "/" + cachesize;
        }
    }

    /**
     * return all pager and database stats for the current process.
     * @return {@link PagerStats}
     */
    public static PagerStats getDatabaseInfo() {
        PagerStats stats = new PagerStats();
        nativeGetPagerStats(stats);
        stats.dbStats = SQLiteDatabase.getDbStats();
        return stats;
    }

    /**
     * Dumps detailed information about all databases used by the process.
     * @param printer The printer for dumping database state.
     * @param args Command-line arguments supplied to dumpsys dbinfo
     */
    public static void dump(Printer printer, String[] args) {
        boolean verbose = false;
        for (String arg : args) {
            if (arg.equals("-v")) {
                verbose = true;
            }
        }

        SQLiteDatabase.dumpAll(printer, verbose);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDirectCursorDriver.java.





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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.database.Cursor;
import org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory;
import android.os.CancellationSignal;

/**
 * A cursor driver that uses the given query directly.
 * 
 * @hide
 */
public final class SQLiteDirectCursorDriver implements SQLiteCursorDriver {
    private final SQLiteDatabase mDatabase;
    private final String mEditTable; 
    private final String mSql;
    private final CancellationSignal mCancellationSignal;
    private SQLiteQuery mQuery;

    public SQLiteDirectCursorDriver(SQLiteDatabase db, String sql, String editTable,
            CancellationSignal cancellationSignal) {
        mDatabase = db;
        mEditTable = editTable;
        mSql = sql;
        mCancellationSignal = cancellationSignal;
    }

    public Cursor query(CursorFactory factory, String[] selectionArgs) {
        final SQLiteQuery query = new SQLiteQuery(mDatabase, mSql, mCancellationSignal);
        final Cursor cursor;
        try {
            query.bindAllArgsAsStrings(selectionArgs);

            if (factory == null) {
                cursor = new SQLiteCursor(this, mEditTable, query);
            } else {
                cursor = factory.newCursor(mDatabase, this, mEditTable, query);
            }
        } catch (RuntimeException ex) {
            query.close();
            throw ex;
        }

        mQuery = query;
        return cursor;
    }

    public void cursorClosed() {
        // Do nothing
    }

    public void setBindArguments(String[] bindArgs) {
        mQuery.bindAllArgsAsStrings(bindArgs);
    }

    public void cursorDeactivated() {
        // Do nothing
    }

    public void cursorRequeried(Cursor cursor) {
        // Do nothing
    }

    @Override
    public String toString() {
        return "SQLiteDirectCursorDriver: " + mSql;
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDiskIOException.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that an IO error occured while accessing the 
 * SQLite database file.
 */
public class SQLiteDiskIOException extends SQLiteException {
    public SQLiteDiskIOException() {}

    public SQLiteDiskIOException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteDoneException.java.





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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that the SQLite program is done.
 * Thrown when an operation that expects a row (such as {@link
 * SQLiteStatement#simpleQueryForString} or {@link
 * SQLiteStatement#simpleQueryForLong}) does not get one.
 */
public class SQLiteDoneException extends SQLiteException {
    public SQLiteDoneException() {}

    public SQLiteDoneException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteException.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import org.sqlite.database.SQLException;

/**
 * A SQLite exception that indicates there was an error with SQL parsing or execution.
 */
public class SQLiteException extends SQLException {
    public SQLiteException() {
    }

    public SQLiteException(String error) {
        super(error);
    }

    public SQLiteException(String error, Throwable cause) {
        super(error, cause);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteFullException.java.





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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * An exception that indicates that the SQLite database is full.
 */
public class SQLiteFullException extends SQLiteException {
    public SQLiteFullException() {}

    public SQLiteFullException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteGlobal.java.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.content.res.Resources;
import android.os.StatFs;
/* import android.os.SystemProperties; */

/**
 * Provides access to SQLite functions that affect all database connection,
 * such as memory management.
 *
 * The native code associated with SQLiteGlobal is also sets global configuration options
 * using sqlite3_config() then calls sqlite3_initialize() to ensure that the SQLite
 * library is properly initialized exactly once before any other framework or application
 * code has a chance to run.
 *
 * Verbose SQLite logging is enabled if the "log.tag.SQLiteLog" property is set to "V".
 * (per {@link SQLiteDebug#DEBUG_SQL_LOG}).
 *
 * @hide
 */
public final class SQLiteGlobal {
    private static final String TAG = "SQLiteGlobal";

    private static final Object sLock = new Object();
    private static int sDefaultPageSize;

    private static native int nativeReleaseMemory();

    private SQLiteGlobal() {
    }

    /**
     * Attempts to release memory by pruning the SQLite page cache and other
     * internal data structures.
     *
     * @return The number of bytes that were freed.
     */
    public static int releaseMemory() {
        return nativeReleaseMemory();
    }

    /**
     * Gets the default page size to use when creating a database.
     */
    public static int getDefaultPageSize() {
        synchronized (sLock) {
            if (sDefaultPageSize == 0) {
                sDefaultPageSize = new StatFs("/data").getBlockSize();
            }
            return 1024;
        }
    }

    /**
     * Gets the default journal mode when WAL is not in use.
     */
    public static String getDefaultJournalMode() {
        return "delete";
    }

    /**
     * Gets the journal size limit in bytes.
     */
    public static int getJournalSizeLimit() {
        return 10000;
    }

    /**
     * Gets the default database synchronization mode when WAL is not in use.
     */
    public static String getDefaultSyncMode() {
        return "normal";
    }

    /**
     * Gets the database synchronization mode when in WAL mode.
     */
    public static String getWALSyncMode() {
        return "normal";
    }

    /**
     * Gets the WAL auto-checkpoint integer in database pages.
     */
    public static int getWALAutoCheckpoint() {
        int value = 1000;
        return Math.max(1, value);
    }

    /**
     * Gets the connection pool size when in WAL mode.
     */
    public static int getWALConnectionPoolSize() {
        int value = 10;
        return Math.max(2, value);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteMisuseException.java.





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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * This error can occur if the application creates a SQLiteStatement object and allows multiple
 * threads in the application use it at the same time.
 * Sqlite returns this error if bind and execute methods on this object occur at the same time
 * from multiple threads, like so:
 *     thread # 1: in execute() method of the SQLiteStatement object
 *     while thread # 2: is in bind..() on the same object.
 *</p>
 * FIX this by NEVER sharing the same SQLiteStatement object between threads.
 * Create a local instance of the SQLiteStatement whenever it is needed, use it and close it ASAP.
 * NEVER make it globally available.
 */
public class SQLiteMisuseException extends SQLiteException {
    public SQLiteMisuseException() {}

    public SQLiteMisuseException(String error) {
        super(error);
    }
}






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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.content.Context;
import org.sqlite.database.DatabaseErrorHandler;
import org.sqlite.database.DefaultDatabaseErrorHandler;
import org.sqlite.database.sqlite.SQLiteDatabase.CursorFactory;
import android.util.Log;

/**
 * A helper class to manage database creation and version management.
 *
 * <p>You create a subclass implementing {@link #onCreate}, {@link #onUpgrade} and
 * optionally {@link #onOpen}, and this class takes care of opening the database
 * if it exists, creating it if it does not, and upgrading it as necessary.
 * Transactions are used to make sure the database is always in a sensible state.
 *
 * <p>This class makes it easy for {@link android.content.ContentProvider}
 * implementations to defer opening and upgrading the database until first use,
 * to avoid blocking application startup with long-running database upgrades.
 *
 * <p>For an example, see the NotePadProvider class in the NotePad sample application,
 * in the <em>samples/</em> directory of the SDK.</p>
 *
 * <p class="note"><strong>Note:</strong> this class assumes
 * monotonically increasing version numbers for upgrades.</p>
 */
public abstract class SQLiteOpenHelper {
    private static final String TAG = SQLiteOpenHelper.class.getSimpleName();

    // When true, getReadableDatabase returns a read-only database if it is just being opened.
    // The database handle is reopened in read/write mode when getWritableDatabase is called.
    // We leave this behavior disabled in production because it is inefficient and breaks
    // many applications.  For debugging purposes it can be useful to turn on strict
    // read-only semantics to catch applications that call getReadableDatabase when they really
    // wanted getWritableDatabase.
    private static final boolean DEBUG_STRICT_READONLY = false;

    private final Context mContext;
    private final String mName;
    private final CursorFactory mFactory;
    private final int mNewVersion;

    private SQLiteDatabase mDatabase;
    private boolean mIsInitializing;
    private boolean mEnableWriteAheadLogging;
    private final DatabaseErrorHandler mErrorHandler;

    /**
     * Create a helper object to create, open, and/or manage a database.
     * This method always returns very quickly.  The database is not actually
     * created or opened until one of {@link #getWritableDatabase} or
     * {@link #getReadableDatabase} is called.
     *
     * @param context to use to open or create the database
     * @param name of the database file, or null for an in-memory database
     * @param factory to use for creating cursor objects, or null for the default
     * @param version number of the database (starting at 1); if the database is older,
     *     {@link #onUpgrade} will be used to upgrade the database; if the database is
     *     newer, {@link #onDowngrade} will be used to downgrade the database
     */
    public SQLiteOpenHelper(Context context, String name, CursorFactory factory, int version) {
        this(context, name, factory, version, null);
    }

    /**
     * Create a helper object to create, open, and/or manage a database.
     * The database is not actually created or opened until one of
     * {@link #getWritableDatabase} or {@link #getReadableDatabase} is called.
     *
     * <p>Accepts input param: a concrete instance of {@link DatabaseErrorHandler} to be
     * used to handle corruption when sqlite reports database corruption.</p>
     *
     * @param context to use to open or create the database
     * @param name of the database file, or null for an in-memory database
     * @param factory to use for creating cursor objects, or null for the default
     * @param version number of the database (starting at 1); if the database is older,
     *     {@link #onUpgrade} will be used to upgrade the database; if the database is
     *     newer, {@link #onDowngrade} will be used to downgrade the database
     * @param errorHandler the {@link DatabaseErrorHandler} to be used when sqlite reports database
     * corruption, or null to use the default error handler.
     */
    public SQLiteOpenHelper(Context context, String name, CursorFactory factory, int version,
            DatabaseErrorHandler errorHandler) {
        if (version < 1) throw new IllegalArgumentException("Version must be >= 1, was " + version);

        mContext = context;
        mName = name;
        mFactory = factory;
        mNewVersion = version;
        mErrorHandler = errorHandler;
    }

    /**
     * Return the name of the SQLite database being opened, as given to
     * the constructor.
     */
    public String getDatabaseName() {
        return mName;
    }

    /**
     * Enables or disables the use of write-ahead logging for the database.
     *
     * Write-ahead logging cannot be used with read-only databases so the value of
     * this flag is ignored if the database is opened read-only.
     *
     * @param enabled True if write-ahead logging should be enabled, false if it
     * should be disabled.
     *
     * @see SQLiteDatabase#enableWriteAheadLogging()
     */
    public void setWriteAheadLoggingEnabled(boolean enabled) {
        synchronized (this) {
            if (mEnableWriteAheadLogging != enabled) {
                if (mDatabase != null && mDatabase.isOpen() && !mDatabase.isReadOnly()) {
                    if (enabled) {
                        mDatabase.enableWriteAheadLogging();
                    } else {
                        mDatabase.disableWriteAheadLogging();
                    }
                }
                mEnableWriteAheadLogging = enabled;
            }
        }
    }

    /**
     * Create and/or open a database that will be used for reading and writing.
     * The first time this is called, the database will be opened and
     * {@link #onCreate}, {@link #onUpgrade} and/or {@link #onOpen} will be
     * called.
     *
     * <p>Once opened successfully, the database is cached, so you can
     * call this method every time you need to write to the database.
     * (Make sure to call {@link #close} when you no longer need the database.)
     * Errors such as bad permissions or a full disk may cause this method
     * to fail, but future attempts may succeed if the problem is fixed.</p>
     *
     * <p class="caution">Database upgrade may take a long time, you
     * should not call this method from the application main thread, including
     * from {@link android.content.ContentProvider#onCreate ContentProvider.onCreate()}.
     *
     * @throws SQLiteException if the database cannot be opened for writing
     * @return a read/write database object valid until {@link #close} is called
     */
    public SQLiteDatabase getWritableDatabase() {
        synchronized (this) {
            return getDatabaseLocked(true);
        }
    }

    /**
     * Create and/or open a database.  This will be the same object returned by
     * {@link #getWritableDatabase} unless some problem, such as a full disk,
     * requires the database to be opened read-only.  In that case, a read-only
     * database object will be returned.  If the problem is fixed, a future call
     * to {@link #getWritableDatabase} may succeed, in which case the read-only
     * database object will be closed and the read/write object will be returned
     * in the future.
     *
     * <p class="caution">Like {@link #getWritableDatabase}, this method may
     * take a long time to return, so you should not call it from the
     * application main thread, including from
     * {@link android.content.ContentProvider#onCreate ContentProvider.onCreate()}.
     *
     * @throws SQLiteException if the database cannot be opened
     * @return a database object valid until {@link #getWritableDatabase}
     *     or {@link #close} is called.
     */
    public SQLiteDatabase getReadableDatabase() {
        synchronized (this) {
            return getDatabaseLocked(false);
        }
    }

    private SQLiteDatabase getDatabaseLocked(boolean writable) {
        if (mDatabase != null) {
            if (!mDatabase.isOpen()) {
                // Darn!  The user closed the database by calling mDatabase.close().
                mDatabase = null;
            } else if (!writable || !mDatabase.isReadOnly()) {
                // The database is already open for business.
                return mDatabase;
            }
        }

        if (mIsInitializing) {
            throw new IllegalStateException("getDatabase called recursively");
        }

        SQLiteDatabase db = mDatabase;
        try {
            mIsInitializing = true;

            if (db != null) {
                if (writable && db.isReadOnly()) {
                    db.reopenReadWrite();
                }
            } else if (mName == null) {
                db = SQLiteDatabase.create(null);
            } else {
                try {
                    if (DEBUG_STRICT_READONLY && !writable) {
                        final String path = mContext.getDatabasePath(mName).getPath();
                        db = SQLiteDatabase.openDatabase(path, mFactory,
                                SQLiteDatabase.OPEN_READONLY, mErrorHandler);
                    } else {
                        db = SQLiteDatabase.openOrCreateDatabase(
                                mName, mFactory, mErrorHandler
                        );
                    }
                } catch (SQLiteException ex) {
                    if (writable) {
                        throw ex;
                    }
                    Log.e(TAG, "Couldn't open " + mName
                            + " for writing (will try read-only):", ex);
                    final String path = mContext.getDatabasePath(mName).getPath();
                    db = SQLiteDatabase.openDatabase(path, mFactory,
                            SQLiteDatabase.OPEN_READONLY, mErrorHandler);
                }
            }

            onConfigure(db);

            final int version = db.getVersion();
            if (version != mNewVersion) {
                if (db.isReadOnly()) {
                    throw new SQLiteException("Can't upgrade read-only database from version " +
                            db.getVersion() + " to " + mNewVersion + ": " + mName);
                }

                db.beginTransaction();
                try {
                    if (version == 0) {
                        onCreate(db);
                    } else {
                        if (version > mNewVersion) {
                            onDowngrade(db, version, mNewVersion);
                        } else {
                            onUpgrade(db, version, mNewVersion);
                        }
                    }
                    db.setVersion(mNewVersion);
                    db.setTransactionSuccessful();
                } finally {
                    db.endTransaction();
                }
            }

            onOpen(db);

            if (db.isReadOnly()) {
                Log.w(TAG, "Opened " + mName + " in read-only mode");
            }

            mDatabase = db;
            return db;
        } finally {
            mIsInitializing = false;
            if (db != null && db != mDatabase) {
                db.close();
            }
        }
    }

    /**
     * Close any open database object.
     */
    public synchronized void close() {
        if (mIsInitializing) throw new IllegalStateException("Closed during initialization");

        if (mDatabase != null && mDatabase.isOpen()) {
            mDatabase.close();
            mDatabase = null;
        }
    }

    /**
     * Called when the database connection is being configured, to enable features
     * such as write-ahead logging or foreign key support.
     * <p>
     * This method is called before {@link #onCreate}, {@link #onUpgrade},
     * {@link #onDowngrade}, or {@link #onOpen} are called.  It should not modify
     * the database except to configure the database connection as required.
     * </p><p>
     * This method should only call methods that configure the parameters of the
     * database connection, such as {@link SQLiteDatabase#enableWriteAheadLogging}
     * {@link SQLiteDatabase#setForeignKeyConstraintsEnabled},
     * {@link SQLiteDatabase#setLocale}, {@link SQLiteDatabase#setMaximumSize},
     * or executing PRAGMA statements.
     * </p>
     *
     * @param db The database.
     */
    public void onConfigure(SQLiteDatabase db) {}

    /**
     * Called when the database is created for the first time. This is where the
     * creation of tables and the initial population of the tables should happen.
     *
     * @param db The database.
     */
    public abstract void onCreate(SQLiteDatabase db);

    /**
     * Called when the database needs to be upgraded. The implementation
     * should use this method to drop tables, add tables, or do anything else it
     * needs to upgrade to the new schema version.
     *
     * <p>
     * The SQLite ALTER TABLE documentation can be found
     * <a href="http://sqlite.org/lang_altertable.html">here</a>. If you add new columns
     * you can use ALTER TABLE to insert them into a live table. If you rename or remove columns
     * you can use ALTER TABLE to rename the old table, then create the new table and then
     * populate the new table with the contents of the old table.
     * </p><p>
     * This method executes within a transaction.  If an exception is thrown, all changes
     * will automatically be rolled back.
     * </p>
     *
     * @param db The database.
     * @param oldVersion The old database version.
     * @param newVersion The new database version.
     */
    public abstract void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion);

    /**
     * Called when the database needs to be downgraded. This is strictly similar to
     * {@link #onUpgrade} method, but is called whenever current version is newer than requested one.
     * However, this method is not abstract, so it is not mandatory for a customer to
     * implement it. If not overridden, default implementation will reject downgrade and
     * throws SQLiteException
     *
     * <p>
     * This method executes within a transaction.  If an exception is thrown, all changes
     * will automatically be rolled back.
     * </p>
     *
     * @param db The database.
     * @param oldVersion The old database version.
     * @param newVersion The new database version.
     */
    public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        throw new SQLiteException("Can't downgrade database from version " +
                oldVersion + " to " + newVersion);
    }

    /**
     * Called when the database has been opened.  The implementation
     * should check {@link SQLiteDatabase#isReadOnly} before updating the
     * database.
     * <p>
     * This method is called after the database connection has been configured
     * and after the database schema has been created, upgraded or downgraded as necessary.
     * If the database connection must be configured in some way before the schema
     * is created, upgraded, or downgraded, do it in {@link #onConfigure} instead.
     * </p>
     *
     * @param db The database.
     */
    public void onOpen(SQLiteDatabase db) {}
}






Deleted src/org/sqlite/database/sqlite/SQLiteOutOfMemoryException.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

public class SQLiteOutOfMemoryException extends SQLiteException {
    public SQLiteOutOfMemoryException() {}

    public SQLiteOutOfMemoryException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteProgram.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.database.DatabaseUtils;
import android.os.CancellationSignal;

import java.util.Arrays;

/**
 * A base class for compiled SQLite programs.
 * <p>
 * This class is not thread-safe.
 * </p>
 */
public abstract class SQLiteProgram extends SQLiteClosable {
    private static final String[] EMPTY_STRING_ARRAY = new String[0];

    private final SQLiteDatabase mDatabase;
    private final String mSql;
    private final boolean mReadOnly;
    private final String[] mColumnNames;
    private final int mNumParameters;
    private final Object[] mBindArgs;

    SQLiteProgram(SQLiteDatabase db, String sql, Object[] bindArgs,
            CancellationSignal cancellationSignalForPrepare) {
        mDatabase = db;
        mSql = sql.trim();

        int n = DatabaseUtils.getSqlStatementType(mSql);
        switch (n) {
            case DatabaseUtils.STATEMENT_BEGIN:
            case DatabaseUtils.STATEMENT_COMMIT:
            case DatabaseUtils.STATEMENT_ABORT:
                mReadOnly = false;
                mColumnNames = EMPTY_STRING_ARRAY;
                mNumParameters = 0;
                break;

            default:
                boolean assumeReadOnly = (n == DatabaseUtils.STATEMENT_SELECT);
                SQLiteStatementInfo info = new SQLiteStatementInfo();
                db.getThreadSession().prepare(mSql,
                        db.getThreadDefaultConnectionFlags(assumeReadOnly),
                        cancellationSignalForPrepare, info);
                mReadOnly = info.readOnly;
                mColumnNames = info.columnNames;
                mNumParameters = info.numParameters;
                break;
        }

        if (bindArgs != null && bindArgs.length > mNumParameters) {
            throw new IllegalArgumentException("Too many bind arguments.  "
                    + bindArgs.length + " arguments were provided but the statement needs "
                    + mNumParameters + " arguments.");
        }

        if (mNumParameters != 0) {
            mBindArgs = new Object[mNumParameters];
            if (bindArgs != null) {
                System.arraycopy(bindArgs, 0, mBindArgs, 0, bindArgs.length);
            }
        } else {
            mBindArgs = null;
        }
    }

    final SQLiteDatabase getDatabase() {
        return mDatabase;
    }

    final String getSql() {
        return mSql;
    }

    final Object[] getBindArgs() {
        return mBindArgs;
    }

    final String[] getColumnNames() {
        return mColumnNames;
    }

    /** @hide */
    protected final SQLiteSession getSession() {
        return mDatabase.getThreadSession();
    }

    /** @hide */
    protected final int getConnectionFlags() {
        return mDatabase.getThreadDefaultConnectionFlags(mReadOnly);
    }

    /** @hide */
    protected final void onCorruption() {
        mDatabase.onCorruption();
    }

    /**
     * Unimplemented.
     * @deprecated This method is deprecated and must not be used.
     */
    @Deprecated
    public final int getUniqueId() {
        return -1;
    }

    /**
     * Bind a NULL value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *
     * @param index The 1-based index to the parameter to bind null to
     */
    public void bindNull(int index) {
        bind(index, null);
    }

    /**
     * Bind a long value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *addToBindArgs
     * @param index The 1-based index to the parameter to bind
     * @param value The value to bind
     */
    public void bindLong(int index, long value) {
        bind(index, value);
    }

    /**
     * Bind a double value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *
     * @param index The 1-based index to the parameter to bind
     * @param value The value to bind
     */
    public void bindDouble(int index, double value) {
        bind(index, value);
    }

    /**
     * Bind a String value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *
     * @param index The 1-based index to the parameter to bind
     * @param value The value to bind, must not be null
     */
    public void bindString(int index, String value) {
        if (value == null) {
            throw new IllegalArgumentException("the bind value at index " + index + " is null");
        }
        bind(index, value);
    }

    /**
     * Bind a byte array value to this statement. The value remains bound until
     * {@link #clearBindings} is called.
     *
     * @param index The 1-based index to the parameter to bind
     * @param value The value to bind, must not be null
     */
    public void bindBlob(int index, byte[] value) {
        if (value == null) {
            throw new IllegalArgumentException("the bind value at index " + index + " is null");
        }
        bind(index, value);
    }

    /**
     * Clears all existing bindings. Unset bindings are treated as NULL.
     */
    public void clearBindings() {
        if (mBindArgs != null) {
            Arrays.fill(mBindArgs, null);
        }
    }

    /**
     * Given an array of String bindArgs, this method binds all of them in one single call.
     *
     * @param bindArgs the String array of bind args, none of which must be null.
     */
    public void bindAllArgsAsStrings(String[] bindArgs) {
        if (bindArgs != null) {
            for (int i = bindArgs.length; i != 0; i--) {
                bindString(i, bindArgs[i - 1]);
            }
        }
    }

    @Override
    protected void onAllReferencesReleased() {
        clearBindings();
    }

    private void bind(int index, Object value) {
        if (index < 1 || index > mNumParameters) {
            throw new IllegalArgumentException("Cannot bind argument at index "
                    + index + " because the index is out of range.  "
                    + "The statement has " + mNumParameters + " parameters.");
        }
        mBindArgs[index - 1] = value;
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteQuery.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.database.CursorWindow;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.util.Log;

/**
 * Represents a query that reads the resulting rows into a {@link SQLiteQuery}.
 * This class is used by {@link SQLiteCursor} and isn't useful itself.
 * <p>
 * This class is not thread-safe.
 * </p>
 */
public final class SQLiteQuery extends SQLiteProgram {
    private static final String TAG = "SQLiteQuery";

    private final CancellationSignal mCancellationSignal;

    SQLiteQuery(SQLiteDatabase db, String query, CancellationSignal cancellationSignal) {
        super(db, query, null, cancellationSignal);

        mCancellationSignal = cancellationSignal;
    }

    /**
     * Reads rows into a buffer.
     *
     * @param window The window to fill into
     * @param startPos The start position for filling the window.
     * @param requiredPos The position of a row that MUST be in the window.
     * If it won't fit, then the query should discard part of what it filled.
     * @param countAllRows True to count all rows that the query would
     * return regardless of whether they fit in the window.
     * @return Number of rows that were enumerated.  Might not be all rows
     * unless countAllRows is true.
     *
     * @throws SQLiteException if an error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     */
    int fillWindow(CursorWindow window, int startPos, int requiredPos, boolean countAllRows) {
        acquireReference();
        try {
            window.acquireReference();
            try {
                int numRows = getSession().executeForCursorWindow(getSql(), getBindArgs(),
                        window, startPos, requiredPos, countAllRows, getConnectionFlags(),
                        mCancellationSignal);
                return numRows;
            } catch (SQLiteDatabaseCorruptException ex) {
                onCorruption();
                throw ex;
            } catch (SQLiteException ex) {
                Log.e(TAG, "exception: " + ex.getMessage() + "; query: " + getSql());
                throw ex;
            } finally {
                window.releaseReference();
            }
        } finally {
            releaseReference();
        }
    }

    @Override
    public String toString() {
        return "SQLiteQuery: " + getSql();
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteQueryBuilder.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.database.Cursor;
import android.database.DatabaseUtils;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.provider.BaseColumns;
import android.text.TextUtils;
import android.util.Log;

import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.regex.Pattern;

/**
 * This is a convience class that helps build SQL queries to be sent to
 * {@link SQLiteDatabase} objects.
 */
public class SQLiteQueryBuilder
{
    private static final String TAG = "SQLiteQueryBuilder";
    private static final Pattern sLimitPattern =
            Pattern.compile("\\s*\\d+\\s*(,\\s*\\d+\\s*)?");

    private Map<String, String> mProjectionMap = null;
    private String mTables = "";
    private StringBuilder mWhereClause = null;  // lazily created
    private boolean mDistinct;
    private SQLiteDatabase.CursorFactory mFactory;
    private boolean mStrict;

    public SQLiteQueryBuilder() {
        mDistinct = false;
        mFactory = null;
    }

    /**
     * Mark the query as DISTINCT.
     *
     * @param distinct if true the query is DISTINCT, otherwise it isn't
     */
    public void setDistinct(boolean distinct) {
        mDistinct = distinct;
    }

    /**
     * Returns the list of tables being queried
     *
     * @return the list of tables being queried
     */
    public String getTables() {
        return mTables;
    }

    /**
     * Sets the list of tables to query. Multiple tables can be specified to perform a join.
     * For example:
     *   setTables("foo, bar")
     *   setTables("foo LEFT OUTER JOIN bar ON (foo.id = bar.foo_id)")
     *
     * @param inTables the list of tables to query on
     */
    public void setTables(String inTables) {
        mTables = inTables;
    }

    /**
     * Append a chunk to the WHERE clause of the query. All chunks appended are surrounded
     * by parenthesis and ANDed with the selection passed to {@link #query}. The final
     * WHERE clause looks like:
     *
     * WHERE (&lt;append chunk 1>&lt;append chunk2>) AND (&lt;query() selection parameter>)
     *
     * @param inWhere the chunk of text to append to the WHERE clause.
     */
    public void appendWhere(CharSequence inWhere) {
        if (mWhereClause == null) {
            mWhereClause = new StringBuilder(inWhere.length() + 16);
        }
        if (mWhereClause.length() == 0) {
            mWhereClause.append('(');
        }
        mWhereClause.append(inWhere);
    }

    /**
     * Append a chunk to the WHERE clause of the query. All chunks appended are surrounded
     * by parenthesis and ANDed with the selection passed to {@link #query}. The final
     * WHERE clause looks like:
     *
     * WHERE (&lt;append chunk 1>&lt;append chunk2>) AND (&lt;query() selection parameter>)
     *
     * @param inWhere the chunk of text to append to the WHERE clause. it will be escaped
     * to avoid SQL injection attacks
     */
    public void appendWhereEscapeString(String inWhere) {
        if (mWhereClause == null) {
            mWhereClause = new StringBuilder(inWhere.length() + 16);
        }
        if (mWhereClause.length() == 0) {
            mWhereClause.append('(');
        }
        DatabaseUtils.appendEscapedSQLString(mWhereClause, inWhere);
    }

    /**
     * Sets the projection map for the query.  The projection map maps
     * from column names that the caller passes into query to database
     * column names. This is useful for renaming columns as well as
     * disambiguating column names when doing joins. For example you
     * could map "name" to "people.name".  If a projection map is set
     * it must contain all column names the user may request, even if
     * the key and value are the same.
     *
     * @param columnMap maps from the user column names to the database column names
     */
    public void setProjectionMap(Map<String, String> columnMap) {
        mProjectionMap = columnMap;
    }

    /**
     * Sets the cursor factory to be used for the query.  You can use
     * one factory for all queries on a database but it is normally
     * easier to specify the factory when doing this query.
     *
     * @param factory the factory to use.
     */
    public void setCursorFactory(SQLiteDatabase.CursorFactory factory) {
        mFactory = factory;
    }

    /**
     * When set, the selection is verified against malicious arguments.
     * When using this class to create a statement using
     * {@link #buildQueryString(boolean, String, String[], String, String, String, String, String)},
     * non-numeric limits will raise an exception. If a projection map is specified, fields
     * not in that map will be ignored.
     * If this class is used to execute the statement directly using
     * {@link #query(SQLiteDatabase, String[], String, String[], String, String, String)}
     * or
     * {@link #query(SQLiteDatabase, String[], String, String[], String, String, String, String)},
     * additionally also parenthesis escaping selection are caught.
     *
     * To summarize: To get maximum protection against malicious third party apps (for example
     * content provider consumers), make sure to do the following:
     * <ul>
     * <li>Set this value to true</li>
     * <li>Use a projection map</li>
     * <li>Use one of the query overloads instead of getting the statement as a sql string</li>
     * </ul>
     * By default, this value is false.
     */
    public void setStrict(boolean flag) {
        mStrict = flag;
    }

    /**
     * Build an SQL query string from the given clauses.
     *
     * @param distinct true if you want each row to be unique, false otherwise.
     * @param tables The table names to compile the query against.
     * @param columns A list of which columns to return. Passing null will
     *            return all columns, which is discouraged to prevent reading
     *            data from storage that isn't going to be used.
     * @param where A filter declaring which rows to return, formatted as an SQL
     *            WHERE clause (excluding the WHERE itself). Passing null will
     *            return all rows for the given URL.
     * @param groupBy A filter declaring how to group rows, formatted as an SQL
     *            GROUP BY clause (excluding the GROUP BY itself). Passing null
     *            will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in the cursor,
     *            if row grouping is being used, formatted as an SQL HAVING
     *            clause (excluding the HAVING itself). Passing null will cause
     *            all row groups to be included, and is required when row
     *            grouping is not being used.
     * @param orderBy How to order the rows, formatted as an SQL ORDER BY clause
     *            (excluding the ORDER BY itself). Passing null will use the
     *            default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *            formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return the SQL query string
     */
    public static String buildQueryString(
            boolean distinct, String tables, String[] columns, String where,
            String groupBy, String having, String orderBy, String limit) {
        if (TextUtils.isEmpty(groupBy) && !TextUtils.isEmpty(having)) {
            throw new IllegalArgumentException(
                    "HAVING clauses are only permitted when using a groupBy clause");
        }
        if (!TextUtils.isEmpty(limit) && !sLimitPattern.matcher(limit).matches()) {
            throw new IllegalArgumentException("invalid LIMIT clauses:" + limit);
        }

        StringBuilder query = new StringBuilder(120);

        query.append("SELECT ");
        if (distinct) {
            query.append("DISTINCT ");
        }
        if (columns != null && columns.length != 0) {
            appendColumns(query, columns);
        } else {
            query.append("* ");
        }
        query.append("FROM ");
        query.append(tables);
        appendClause(query, " WHERE ", where);
        appendClause(query, " GROUP BY ", groupBy);
        appendClause(query, " HAVING ", having);
        appendClause(query, " ORDER BY ", orderBy);
        appendClause(query, " LIMIT ", limit);

        return query.toString();
    }

    private static void appendClause(StringBuilder s, String name, String clause) {
        if (!TextUtils.isEmpty(clause)) {
            s.append(name);
            s.append(clause);
        }
    }

    /**
     * Add the names that are non-null in columns to s, separating
     * them with commas.
     */
    public static void appendColumns(StringBuilder s, String[] columns) {
        int n = columns.length;

        for (int i = 0; i < n; i++) {
            String column = columns[i];

            if (column != null) {
                if (i > 0) {
                    s.append(", ");
                }
                s.append(column);
            }
        }
        s.append(' ');
    }

    /**
     * Perform a query by combining all current settings and the
     * information passed into this method.
     *
     * @param db the database to query on
     * @param projectionIn A list of which columns to return. Passing
     *   null will return all columns, which is discouraged to prevent
     *   reading data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself). Passing null will return all rows for the given URL.
     * @param selectionArgs You may include ?s in selection, which
     *   will be replaced by the values from selectionArgs, in order
     *   that they appear in the selection. The values will be bound
     *   as Strings.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY
     *   itself). Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself). Passing null
     *   will use the default sort order, which may be unordered.
     * @return a cursor over the result set
     * @see android.content.ContentResolver#query(android.net.Uri, String[],
     *      String, String[], String)
     */
    public Cursor query(SQLiteDatabase db, String[] projectionIn,
            String selection, String[] selectionArgs, String groupBy,
            String having, String sortOrder) {
        return query(db, projectionIn, selection, selectionArgs, groupBy, having, sortOrder,
                null /* limit */, null /* cancellationSignal */);
    }

    /**
     * Perform a query by combining all current settings and the
     * information passed into this method.
     *
     * @param db the database to query on
     * @param projectionIn A list of which columns to return. Passing
     *   null will return all columns, which is discouraged to prevent
     *   reading data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself). Passing null will return all rows for the given URL.
     * @param selectionArgs You may include ?s in selection, which
     *   will be replaced by the values from selectionArgs, in order
     *   that they appear in the selection. The values will be bound
     *   as Strings.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY
     *   itself). Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself). Passing null
     *   will use the default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *   formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return a cursor over the result set
     * @see android.content.ContentResolver#query(android.net.Uri, String[],
     *      String, String[], String)
     */
    public Cursor query(SQLiteDatabase db, String[] projectionIn,
            String selection, String[] selectionArgs, String groupBy,
            String having, String sortOrder, String limit) {
        return query(db, projectionIn, selection, selectionArgs,
                groupBy, having, sortOrder, limit, null);
    }

    /**
     * Perform a query by combining all current settings and the
     * information passed into this method.
     *
     * @param db the database to query on
     * @param projectionIn A list of which columns to return. Passing
     *   null will return all columns, which is discouraged to prevent
     *   reading data from storage that isn't going to be used.
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself). Passing null will return all rows for the given URL.
     * @param selectionArgs You may include ?s in selection, which
     *   will be replaced by the values from selectionArgs, in order
     *   that they appear in the selection. The values will be bound
     *   as Strings.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY
     *   itself). Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself). Passing null
     *   will use the default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *   formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * If the operation is canceled, then {@link OperationCanceledException} will be thrown
     * when the query is executed.
     * @return a cursor over the result set
     * @see android.content.ContentResolver#query(android.net.Uri, String[],
     *      String, String[], String)
     */
    public Cursor query(SQLiteDatabase db, String[] projectionIn,
            String selection, String[] selectionArgs, String groupBy,
            String having, String sortOrder, String limit, CancellationSignal cancellationSignal) {
        if (mTables == null) {
            return null;
        }

        if (mStrict && selection != null && selection.length() > 0) {
            // Validate the user-supplied selection to detect syntactic anomalies
            // in the selection string that could indicate a SQL injection attempt.
            // The idea is to ensure that the selection clause is a valid SQL expression
            // by compiling it twice: once wrapped in parentheses and once as
            // originally specified. An attacker cannot create an expression that
            // would escape the SQL expression while maintaining balanced parentheses
            // in both the wrapped and original forms.
            String sqlForValidation = buildQuery(projectionIn, "(" + selection + ")", groupBy,
                    having, sortOrder, limit);
            validateQuerySql(db, sqlForValidation,
                    cancellationSignal); // will throw if query is invalid
        }

        String sql = buildQuery(
                projectionIn, selection, groupBy, having,
                sortOrder, limit);

        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "Performing query: " + sql);
        }
        return db.rawQueryWithFactory(
                mFactory, sql, selectionArgs,
                SQLiteDatabase.findEditTable(mTables),
                cancellationSignal); // will throw if query is invalid
    }

    /**
     * Verifies that a SQL SELECT statement is valid by compiling it.
     * If the SQL statement is not valid, this method will throw a {@link SQLiteException}.
     */
    private void validateQuerySql(SQLiteDatabase db, String sql,
            CancellationSignal cancellationSignal) {
        db.getThreadSession().prepare(sql,
                db.getThreadDefaultConnectionFlags(true /*readOnly*/), cancellationSignal, null);
    }

    /**
     * Construct a SELECT statement suitable for use in a group of
     * SELECT statements that will be joined through UNION operators
     * in buildUnionQuery.
     *
     * @param projectionIn A list of which columns to return. Passing
     *    null will return all columns, which is discouraged to
     *    prevent reading data from storage that isn't going to be
     *    used.
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself).  Passing null will return all rows for the given
     *   URL.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY itself).
     *   Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself). Passing null
     *   will use the default sort order, which may be unordered.
     * @param limit Limits the number of rows returned by the query,
     *   formatted as LIMIT clause. Passing null denotes no LIMIT clause.
     * @return the resulting SQL SELECT statement
     */
    public String buildQuery(
            String[] projectionIn, String selection, String groupBy,
            String having, String sortOrder, String limit) {
        String[] projection = computeProjection(projectionIn);

        StringBuilder where = new StringBuilder();
        boolean hasBaseWhereClause = mWhereClause != null && mWhereClause.length() > 0;

        if (hasBaseWhereClause) {
            where.append(mWhereClause.toString());
            where.append(')');
        }

        // Tack on the user's selection, if present.
        if (selection != null && selection.length() > 0) {
            if (hasBaseWhereClause) {
                where.append(" AND ");
            }

            where.append('(');
            where.append(selection);
            where.append(')');
        }

        return buildQueryString(
                mDistinct, mTables, projection, where.toString(),
                groupBy, having, sortOrder, limit);
    }

    /**
     * @deprecated This method's signature is misleading since no SQL parameter
     * substitution is carried out.  The selection arguments parameter does not get
     * used at all.  To avoid confusion, call
     * {@link #buildQuery(String[], String, String, String, String, String)} instead.
     */
    @Deprecated
    public String buildQuery(
            String[] projectionIn, String selection, String[] selectionArgs,
            String groupBy, String having, String sortOrder, String limit) {
        return buildQuery(projectionIn, selection, groupBy, having, sortOrder, limit);
    }

    /**
     * Construct a SELECT statement suitable for use in a group of
     * SELECT statements that will be joined through UNION operators
     * in buildUnionQuery.
     *
     * @param typeDiscriminatorColumn the name of the result column
     *   whose cells will contain the name of the table from which
     *   each row was drawn.
     * @param unionColumns the names of the columns to appear in the
     *   result.  This may include columns that do not appear in the
     *   table this SELECT is querying (i.e. mTables), but that do
     *   appear in one of the other tables in the UNION query that we
     *   are constructing.
     * @param columnsPresentInTable a Set of the names of the columns
     *   that appear in this table (i.e. in the table whose name is
     *   mTables).  Since columns in unionColumns include columns that
     *   appear only in other tables, we use this array to distinguish
     *   which ones actually are present.  Other columns will have
     *   NULL values for results from this subquery.
     * @param computedColumnsOffset all columns in unionColumns before
     *   this index are included under the assumption that they're
     *   computed and therefore won't appear in columnsPresentInTable,
     *   e.g. "date * 1000 as normalized_date"
     * @param typeDiscriminatorValue the value used for the
     *   type-discriminator column in this subquery
     * @param selection A filter declaring which rows to return,
     *   formatted as an SQL WHERE clause (excluding the WHERE
     *   itself).  Passing null will return all rows for the given
     *   URL.
     * @param groupBy A filter declaring how to group rows, formatted
     *   as an SQL GROUP BY clause (excluding the GROUP BY itself).
     *   Passing null will cause the rows to not be grouped.
     * @param having A filter declare which row groups to include in
     *   the cursor, if row grouping is being used, formatted as an
     *   SQL HAVING clause (excluding the HAVING itself).  Passing
     *   null will cause all row groups to be included, and is
     *   required when row grouping is not being used.
     * @return the resulting SQL SELECT statement
     */
    public String buildUnionSubQuery(
            String typeDiscriminatorColumn,
            String[] unionColumns,
            Set<String> columnsPresentInTable,
            int computedColumnsOffset,
            String typeDiscriminatorValue,
            String selection,
            String groupBy,
            String having) {
        int unionColumnsCount = unionColumns.length;
        String[] projectionIn = new String[unionColumnsCount];

        for (int i = 0; i < unionColumnsCount; i++) {
            String unionColumn = unionColumns[i];

            if (unionColumn.equals(typeDiscriminatorColumn)) {
                projectionIn[i] = "'" + typeDiscriminatorValue + "' AS "
                        + typeDiscriminatorColumn;
            } else if (i <= computedColumnsOffset
                       || columnsPresentInTable.contains(unionColumn)) {
                projectionIn[i] = unionColumn;
            } else {
                projectionIn[i] = "NULL AS " + unionColumn;
            }
        }
        return buildQuery(
                projectionIn, selection, groupBy, having,
                null /* sortOrder */,
                null /* limit */);
    }

    /**
     * @deprecated This method's signature is misleading since no SQL parameter
     * substitution is carried out.  The selection arguments parameter does not get
     * used at all.  To avoid confusion, call
     * {@link #buildUnionSubQuery}
     * instead.
     */
    @Deprecated
    public String buildUnionSubQuery(
            String typeDiscriminatorColumn,
            String[] unionColumns,
            Set<String> columnsPresentInTable,
            int computedColumnsOffset,
            String typeDiscriminatorValue,
            String selection,
            String[] selectionArgs,
            String groupBy,
            String having) {
        return buildUnionSubQuery(
                typeDiscriminatorColumn, unionColumns, columnsPresentInTable,
                computedColumnsOffset, typeDiscriminatorValue, selection,
                groupBy, having);
    }

    /**
     * Given a set of subqueries, all of which are SELECT statements,
     * construct a query that returns the union of what those
     * subqueries return.
     * @param subQueries an array of SQL SELECT statements, all of
     *   which must have the same columns as the same positions in
     *   their results
     * @param sortOrder How to order the rows, formatted as an SQL
     *   ORDER BY clause (excluding the ORDER BY itself).  Passing
     *   null will use the default sort order, which may be unordered.
     * @param limit The limit clause, which applies to the entire union result set
     *
     * @return the resulting SQL SELECT statement
     */
    public String buildUnionQuery(String[] subQueries, String sortOrder, String limit) {
        StringBuilder query = new StringBuilder(128);
        int subQueryCount = subQueries.length;
        String unionOperator = mDistinct ? " UNION " : " UNION ALL ";

        for (int i = 0; i < subQueryCount; i++) {
            if (i > 0) {
                query.append(unionOperator);
            }
            query.append(subQueries[i]);
        }
        appendClause(query, " ORDER BY ", sortOrder);
        appendClause(query, " LIMIT ", limit);
        return query.toString();
    }

    private String[] computeProjection(String[] projectionIn) {
        if (projectionIn != null && projectionIn.length > 0) {
            if (mProjectionMap != null) {
                String[] projection = new String[projectionIn.length];
                int length = projectionIn.length;

                for (int i = 0; i < length; i++) {
                    String userColumn = projectionIn[i];
                    String column = mProjectionMap.get(userColumn);

                    if (column != null) {
                        projection[i] = column;
                        continue;
                    }

                    if (!mStrict &&
                            ( userColumn.contains(" AS ") || userColumn.contains(" as "))) {
                        /* A column alias already exist */
                        projection[i] = userColumn;
                        continue;
                    }

                    throw new IllegalArgumentException("Invalid column "
                            + projectionIn[i]);
                }
                return projection;
            } else {
                return projectionIn;
            }
        } else if (mProjectionMap != null) {
            // Return all columns in projection map.
            Set<Entry<String, String>> entrySet = mProjectionMap.entrySet();
            String[] projection = new String[entrySet.size()];
            Iterator<Entry<String, String>> entryIter = entrySet.iterator();
            int i = 0;

            while (entryIter.hasNext()) {
                Entry<String, String> entry = entryIter.next();

                // Don't include the _count column when people ask for no projection.
                if (entry.getKey().equals(BaseColumns._COUNT)) {
                    continue;
                }
                projection[i++] = entry.getValue();
            }
            return projection;
        }
        return null;
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteReadOnlyDatabaseException.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

public class SQLiteReadOnlyDatabaseException extends SQLiteException {
    public SQLiteReadOnlyDatabaseException() {}

    public SQLiteReadOnlyDatabaseException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteSession.java.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.database.CursorWindow;
import android.database.DatabaseUtils;
import android.os.CancellationSignal;
import android.os.OperationCanceledException;
import android.os.ParcelFileDescriptor;

/**
 * Provides a single client the ability to use a database.
 *
 * <h2>About database sessions</h2>
 * <p>
 * Database access is always performed using a session.  The session
 * manages the lifecycle of transactions and database connections.
 * </p><p>
 * Sessions can be used to perform both read-only and read-write operations.
 * There is some advantage to knowing when a session is being used for
 * read-only purposes because the connection pool can optimize the use
 * of the available connections to permit multiple read-only operations
 * to execute in parallel whereas read-write operations may need to be serialized.
 * </p><p>
 * When <em>Write Ahead Logging (WAL)</em> is enabled, the database can
 * execute simultaneous read-only and read-write transactions, provided that
 * at most one read-write transaction is performed at a time.  When WAL is not
 * enabled, read-only transactions can execute in parallel but read-write
 * transactions are mutually exclusive.
 * </p>
 *
 * <h2>Ownership and concurrency guarantees</h2>
 * <p>
 * Session objects are not thread-safe.  In fact, session objects are thread-bound.
 * The {@link SQLiteDatabase} uses a thread-local variable to associate a session
 * with each thread for the use of that thread alone.  Consequently, each thread
 * has its own session object and therefore its own transaction state independent
 * of other threads.
 * </p><p>
 * A thread has at most one session per database.  This constraint ensures that
 * a thread can never use more than one database connection at a time for a
 * given database.  As the number of available database connections is limited,
 * if a single thread tried to acquire multiple connections for the same database
 * at the same time, it might deadlock.  Therefore we allow there to be only
 * one session (so, at most one connection) per thread per database.
 * </p>
 *
 * <h2>Transactions</h2>
 * <p>
 * There are two kinds of transaction: implicit transactions and explicit
 * transactions.
 * </p><p>
 * An implicit transaction is created whenever a database operation is requested
 * and there is no explicit transaction currently in progress.  An implicit transaction
 * only lasts for the duration of the database operation in question and then it
 * is ended.  If the database operation was successful, then its changes are committed.
 * </p><p>
 * An explicit transaction is started by calling {@link #beginTransaction} and
 * specifying the desired transaction mode.  Once an explicit transaction has begun,
 * all subsequent database operations will be performed as part of that transaction.
 * To end an explicit transaction, first call {@link #setTransactionSuccessful} if the
 * transaction was successful, then call {@link #end}.  If the transaction was
 * marked successful, its changes will be committed, otherwise they will be rolled back.
 * </p><p>
 * Explicit transactions can also be nested.  A nested explicit transaction is
 * started with {@link #beginTransaction}, marked successful with
 * {@link #setTransactionSuccessful}and ended with {@link #endTransaction}.
 * If any nested transaction is not marked successful, then the entire transaction
 * including all of its nested transactions will be rolled back
 * when the outermost transaction is ended.
 * </p><p>
 * To improve concurrency, an explicit transaction can be yielded by calling
 * {@link #yieldTransaction}.  If there is contention for use of the database,
 * then yielding ends the current transaction, commits its changes, releases the
 * database connection for use by another session for a little while, and starts a
 * new transaction with the same properties as the original one.
 * Changes committed by {@link #yieldTransaction} cannot be rolled back.
 * </p><p>
 * When a transaction is started, the client can provide a {@link SQLiteTransactionListener}
 * to listen for notifications of transaction-related events.
 * </p><p>
 * Recommended usage:
 * <code><pre>
 * // First, begin the transaction.
 * session.beginTransaction(SQLiteSession.TRANSACTION_MODE_DEFERRED, 0);
 * try {
 *     // Then do stuff...
 *     session.execute("INSERT INTO ...", null, 0);
 *
 *     // As the very last step before ending the transaction, mark it successful.
 *     session.setTransactionSuccessful();
 * } finally {
 *     // Finally, end the transaction.
 *     // This statement will commit the transaction if it was marked successful or
 *     // roll it back otherwise.
 *     session.endTransaction();
 * }
 * </pre></code>
 * </p>
 *
 * <h2>Database connections</h2>
 * <p>
 * A {@link SQLiteDatabase} can have multiple active sessions at the same
 * time.  Each session acquires and releases connections to the database
 * as needed to perform each requested database transaction.  If all connections
 * are in use, then database transactions on some sessions will block until a
 * connection becomes available.
 * </p><p>
 * The session acquires a single database connection only for the duration
 * of a single (implicit or explicit) database transaction, then releases it.
 * This characteristic allows a small pool of database connections to be shared
 * efficiently by multiple sessions as long as they are not all trying to perform
 * database transactions at the same time.
 * </p>
 *
 * <h2>Responsiveness</h2>
 * <p>
 * Because there are a limited number of database connections and the session holds
 * a database connection for the entire duration of a database transaction,
 * it is important to keep transactions short.  This is especially important
 * for read-write transactions since they may block other transactions
 * from executing.  Consider calling {@link #yieldTransaction} periodically
 * during long-running transactions.
 * </p><p>
 * Another important consideration is that transactions that take too long to
 * run may cause the application UI to become unresponsive.  Even if the transaction
 * is executed in a background thread, the user will get bored and
 * frustrated if the application shows no data for several seconds while
 * a transaction runs.
 * </p><p>
 * Guidelines:
 * <ul>
 * <li>Do not perform database transactions on the UI thread.</li>
 * <li>Keep database transactions as short as possible.</li>
 * <li>Simple queries often run faster than complex queries.</li>
 * <li>Measure the performance of your database transactions.</li>
 * <li>Consider what will happen when the size of the data set grows.
 * A query that works well on 100 rows may struggle with 10,000.</li>
 * </ul>
 *
 * <h2>Reentrance</h2>
 * <p>
 * This class must tolerate reentrant execution of SQLite operations because
 * triggers may call custom SQLite functions that perform additional queries.
 * </p>
 *
 * @hide
 */
public final class SQLiteSession {
    private final SQLiteConnectionPool mConnectionPool;

    private SQLiteConnection mConnection;
    private int mConnectionFlags;
    private int mConnectionUseCount;
    private Transaction mTransactionPool;
    private Transaction mTransactionStack;

    /**
     * Transaction mode: Deferred.
     * <p>
     * In a deferred transaction, no locks are acquired on the database
     * until the first operation is performed.  If the first operation is
     * read-only, then a <code>SHARED</code> lock is acquired, otherwise
     * a <code>RESERVED</code> lock is acquired.
     * </p><p>
     * While holding a <code>SHARED</code> lock, this session is only allowed to
     * read but other sessions are allowed to read or write.
     * While holding a <code>RESERVED</code> lock, this session is allowed to read
     * or write but other sessions are only allowed to read.
     * </p><p>
     * Because the lock is only acquired when needed in a deferred transaction,
     * it is possible for another session to write to the database first before
     * this session has a chance to do anything.
     * </p><p>
     * Corresponds to the SQLite <code>BEGIN DEFERRED</code> transaction mode.
     * </p>
     */
    public static final int TRANSACTION_MODE_DEFERRED = 0;

    /**
     * Transaction mode: Immediate.
     * <p>
     * When an immediate transaction begins, the session acquires a
     * <code>RESERVED</code> lock.
     * </p><p>
     * While holding a <code>RESERVED</code> lock, this session is allowed to read
     * or write but other sessions are only allowed to read.
     * </p><p>
     * Corresponds to the SQLite <code>BEGIN IMMEDIATE</code> transaction mode.
     * </p>
     */
    public static final int TRANSACTION_MODE_IMMEDIATE = 1;

    /**
     * Transaction mode: Exclusive.
     * <p>
     * When an exclusive transaction begins, the session acquires an
     * <code>EXCLUSIVE</code> lock.
     * </p><p>
     * While holding an <code>EXCLUSIVE</code> lock, this session is allowed to read
     * or write but no other sessions are allowed to access the database.
     * </p><p>
     * Corresponds to the SQLite <code>BEGIN EXCLUSIVE</code> transaction mode.
     * </p>
     */
    public static final int TRANSACTION_MODE_EXCLUSIVE = 2;

    /**
     * Creates a session bound to the specified connection pool.
     *
     * @param connectionPool The connection pool.
     */
    public SQLiteSession(SQLiteConnectionPool connectionPool) {
        if (connectionPool == null) {
            throw new IllegalArgumentException("connectionPool must not be null");
        }

        mConnectionPool = connectionPool;
    }

    /**
     * Returns true if the session has a transaction in progress.
     *
     * @return True if the session has a transaction in progress.
     */
    public boolean hasTransaction() {
        return mTransactionStack != null;
    }

    /**
     * Returns true if the session has a nested transaction in progress.
     *
     * @return True if the session has a nested transaction in progress.
     */
    public boolean hasNestedTransaction() {
        return mTransactionStack != null && mTransactionStack.mParent != null;
    }

    /**
     * Returns true if the session has an active database connection.
     *
     * @return True if the session has an active database connection.
     */
    public boolean hasConnection() {
        return mConnection != null;
    }

    /**
     * Begins a transaction.
     * <p>
     * Transactions may nest.  If the transaction is not in progress,
     * then a database connection is obtained and a new transaction is started.
     * Otherwise, a nested transaction is started.
     * </p><p>
     * Each call to {@link #beginTransaction} must be matched exactly by a call
     * to {@link #endTransaction}.  To mark a transaction as successful,
     * call {@link #setTransactionSuccessful} before calling {@link #endTransaction}.
     * If the transaction is not successful, or if any of its nested
     * transactions were not successful, then the entire transaction will
     * be rolled back when the outermost transaction is ended.
     * </p>
     *
     * @param transactionMode The transaction mode.  One of: {@link #TRANSACTION_MODE_DEFERRED},
     * {@link #TRANSACTION_MODE_IMMEDIATE}, or {@link #TRANSACTION_MODE_EXCLUSIVE}.
     * Ignored when creating a nested transaction.
     * @param transactionListener The transaction listener, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     *
     * @throws IllegalStateException if {@link #setTransactionSuccessful} has already been
     * called for the current transaction.
     * @throws SQLiteException if an error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     *
     * @see #setTransactionSuccessful
     * @see #yieldTransaction
     * @see #endTransaction
     */
    public void beginTransaction(int transactionMode,
            SQLiteTransactionListener transactionListener, int connectionFlags,
            CancellationSignal cancellationSignal) {
        throwIfTransactionMarkedSuccessful();
        beginTransactionUnchecked(transactionMode, transactionListener, connectionFlags,
                cancellationSignal);
    }

    private void beginTransactionUnchecked(int transactionMode,
            SQLiteTransactionListener transactionListener, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        if (mTransactionStack == null) {
            acquireConnection(null, connectionFlags, cancellationSignal); // might throw
        }
        try {
            // Set up the transaction such that we can back out safely
            // in case we fail part way.
            if (mTransactionStack == null) {
                // Execute SQL might throw a runtime exception.
                switch (transactionMode) {
                    case TRANSACTION_MODE_IMMEDIATE:
                        mConnection.execute("BEGIN IMMEDIATE;", null,
                                cancellationSignal); // might throw
                        break;
                    case TRANSACTION_MODE_EXCLUSIVE:
                        mConnection.execute("BEGIN EXCLUSIVE;", null,
                                cancellationSignal); // might throw
                        break;
                    default:
                        mConnection.execute("BEGIN;", null, cancellationSignal); // might throw
                        break;
                }
            }

            // Listener might throw a runtime exception.
            if (transactionListener != null) {
                try {
                    transactionListener.onBegin(); // might throw
                } catch (RuntimeException ex) {
                    if (mTransactionStack == null) {
                        mConnection.execute("ROLLBACK;", null, cancellationSignal); // might throw
                    }
                    throw ex;
                }
            }

            // Bookkeeping can't throw, except an OOM, which is just too bad...
            Transaction transaction = obtainTransaction(transactionMode, transactionListener);
            transaction.mParent = mTransactionStack;
            mTransactionStack = transaction;
        } finally {
            if (mTransactionStack == null) {
                releaseConnection(); // might throw
            }
        }
    }

    /**
     * Marks the current transaction as having completed successfully.
     * <p>
     * This method can be called at most once between {@link #beginTransaction} and
     * {@link #endTransaction} to indicate that the changes made by the transaction should be
     * committed.  If this method is not called, the changes will be rolled back
     * when the transaction is ended.
     * </p>
     *
     * @throws IllegalStateException if there is no current transaction, or if
     * {@link #setTransactionSuccessful} has already been called for the current transaction.
     *
     * @see #beginTransaction
     * @see #endTransaction
     */
    public void setTransactionSuccessful() {
        throwIfNoTransaction();
        throwIfTransactionMarkedSuccessful();

        mTransactionStack.mMarkedSuccessful = true;
    }

    /**
     * Ends the current transaction and commits or rolls back changes.
     * <p>
     * If this is the outermost transaction (not nested within any other
     * transaction), then the changes are committed if {@link #setTransactionSuccessful}
     * was called or rolled back otherwise.
     * </p><p>
     * This method must be called exactly once for each call to {@link #beginTransaction}.
     * </p>
     *
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     *
     * @throws IllegalStateException if there is no current transaction.
     * @throws SQLiteException if an error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     *
     * @see #beginTransaction
     * @see #setTransactionSuccessful
     * @see #yieldTransaction
     */
    public void endTransaction(CancellationSignal cancellationSignal) {
        throwIfNoTransaction();
        assert mConnection != null;

        endTransactionUnchecked(cancellationSignal, false);
    }

    private void endTransactionUnchecked(CancellationSignal cancellationSignal, boolean yielding) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        final Transaction top = mTransactionStack;
        boolean successful = (top.mMarkedSuccessful || yielding) && !top.mChildFailed;

        RuntimeException listenerException = null;
        final SQLiteTransactionListener listener = top.mListener;
        if (listener != null) {
            try {
                if (successful) {
                    listener.onCommit(); // might throw
                } else {
                    listener.onRollback(); // might throw
                }
            } catch (RuntimeException ex) {
                listenerException = ex;
                successful = false;
            }
        }

        mTransactionStack = top.mParent;
        recycleTransaction(top);

        if (mTransactionStack != null) {
            if (!successful) {
                mTransactionStack.mChildFailed = true;
            }
        } else {
            try {
                if (successful) {
                    mConnection.execute("COMMIT;", null, cancellationSignal); // might throw
                } else {
                    mConnection.execute("ROLLBACK;", null, cancellationSignal); // might throw
                }
            } finally {
                releaseConnection(); // might throw
            }
        }

        if (listenerException != null) {
            throw listenerException;
        }
    }

    /**
     * Temporarily ends a transaction to let other threads have use of
     * the database.  Begins a new transaction after a specified delay.
     * <p>
     * If there are other threads waiting to acquire connections,
     * then the current transaction is committed and the database
     * connection is released.  After a short delay, a new transaction
     * is started.
     * </p><p>
     * The transaction is assumed to be successful so far.  Do not call
     * {@link #setTransactionSuccessful()} before calling this method.
     * This method will fail if the transaction has already been marked
     * successful.
     * </p><p>
     * The changes that were committed by a yield cannot be rolled back later.
     * </p><p>
     * Before this method was called, there must already have been
     * a transaction in progress.  When this method returns, there will
     * still be a transaction in progress, either the same one as before
     * or a new one if the transaction was actually yielded.
     * </p><p>
     * This method should not be called when there is a nested transaction
     * in progress because it is not possible to yield a nested transaction.
     * If <code>throwIfNested</code> is true, then attempting to yield
     * a nested transaction will throw {@link IllegalStateException}, otherwise
     * the method will return <code>false</code> in that case.
     * </p><p>
     * If there is no nested transaction in progress but a previous nested
     * transaction failed, then the transaction is not yielded (because it
     * must be rolled back) and this method returns <code>false</code>.
     * </p>
     *
     * @param sleepAfterYieldDelayMillis A delay time to wait after yielding
     * the database connection to allow other threads some time to run.
     * If the value is less than or equal to zero, there will be no additional
     * delay beyond the time it will take to begin a new transaction.
     * @param throwIfUnsafe If true, then instead of returning false when no
     * transaction is in progress, a nested transaction is in progress, or when
     * the transaction has already been marked successful, throws {@link IllegalStateException}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return True if the transaction was actually yielded.
     *
     * @throws IllegalStateException if <code>throwIfNested</code> is true and
     * there is no current transaction, there is a nested transaction in progress or
     * if {@link #setTransactionSuccessful} has already been called for the current transaction.
     * @throws SQLiteException if an error occurs.
     * @throws OperationCanceledException if the operation was canceled.
     *
     * @see #beginTransaction
     * @see #endTransaction
     */
    public boolean yieldTransaction(long sleepAfterYieldDelayMillis, boolean throwIfUnsafe,
            CancellationSignal cancellationSignal) {
        if (throwIfUnsafe) {
            throwIfNoTransaction();
            throwIfTransactionMarkedSuccessful();
            throwIfNestedTransaction();
        } else {
            if (mTransactionStack == null || mTransactionStack.mMarkedSuccessful
                    || mTransactionStack.mParent != null) {
                return false;
            }
        }
        assert mConnection != null;

        if (mTransactionStack.mChildFailed) {
            return false;
        }

        return yieldTransactionUnchecked(sleepAfterYieldDelayMillis,
                cancellationSignal); // might throw
    }

    private boolean yieldTransactionUnchecked(long sleepAfterYieldDelayMillis,
            CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        if (!mConnectionPool.shouldYieldConnection(mConnection, mConnectionFlags)) {
            return false;
        }

        final int transactionMode = mTransactionStack.mMode;
        final SQLiteTransactionListener listener = mTransactionStack.mListener;
        final int connectionFlags = mConnectionFlags;
        endTransactionUnchecked(cancellationSignal, true); // might throw

        if (sleepAfterYieldDelayMillis > 0) {
            try {
                Thread.sleep(sleepAfterYieldDelayMillis);
            } catch (InterruptedException ex) {
                // we have been interrupted, that's all we need to do
            }
        }

        beginTransactionUnchecked(transactionMode, listener, connectionFlags,
                cancellationSignal); // might throw
        return true;
    }

    /**
     * Prepares a statement for execution but does not bind its parameters or execute it.
     * <p>
     * This method can be used to check for syntax errors during compilation
     * prior to execution of the statement.  If the {@code outStatementInfo} argument
     * is not null, the provided {@link SQLiteStatementInfo} object is populated
     * with information about the statement.
     * </p><p>
     * A prepared statement makes no reference to the arguments that may eventually
     * be bound to it, consequently it it possible to cache certain prepared statements
     * such as SELECT or INSERT/UPDATE statements.  If the statement is cacheable,
     * then it will be stored in the cache for later and reused if possible.
     * </p>
     *
     * @param sql The SQL statement to prepare.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @param outStatementInfo The {@link SQLiteStatementInfo} object to populate
     * with information about the statement, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public void prepare(String sql, int connectionFlags, CancellationSignal cancellationSignal,
            SQLiteStatementInfo outStatementInfo) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            mConnection.prepare(sql, outStatementInfo); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that does not return a result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public void execute(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            mConnection.execute(sql, bindArgs, cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns a single <code>long</code> result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The value of the first column in the first row of the result set
     * as a <code>long</code>, or zero if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public long executeForLong(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return 0;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForLong(sql, bindArgs, cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns a single {@link String} result.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The value of the first column in the first row of the result set
     * as a <code>String</code>, or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public String executeForString(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return null;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForString(sql, bindArgs, cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns a single BLOB result as a
     * file descriptor to a shared memory region.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The file descriptor for a shared memory region that contains
     * the value of the first column in the first row of the result set as a BLOB,
     * or null if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public ParcelFileDescriptor executeForBlobFileDescriptor(String sql, Object[] bindArgs,
            int connectionFlags, CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return null;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForBlobFileDescriptor(sql, bindArgs,
                    cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns a count of the number of rows
     * that were changed.  Use for UPDATE or DELETE SQL statements.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The number of rows that were changed.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public int executeForChangedRowCount(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return 0;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForChangedRowCount(sql, bindArgs,
                    cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement that returns the row id of the last row inserted
     * by the statement.  Use for INSERT SQL statements.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The row id of the last row that was inserted, or 0 if none.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public long executeForLastInsertedRowId(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            return 0;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForLastInsertedRowId(sql, bindArgs,
                    cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Executes a statement and populates the specified {@link CursorWindow}
     * with a range of results.  Returns the number of rows that were counted
     * during query execution.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param window The cursor window to clear and fill.
     * @param startPos The start position for filling the window.
     * @param requiredPos The position of a row that MUST be in the window.
     * If it won't fit, then the query should discard part of what it filled
     * so that it does.  Must be greater than or equal to <code>startPos</code>.
     * @param countAllRows True to count all rows that the query would return
     * regagless of whether they fit in the window.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return The number of rows that were counted during query execution.  Might
     * not be all rows in the result set unless <code>countAllRows</code> is true.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    public int executeForCursorWindow(String sql, Object[] bindArgs,
            CursorWindow window, int startPos, int requiredPos, boolean countAllRows,
            int connectionFlags, CancellationSignal cancellationSignal) {
        if (sql == null) {
            throw new IllegalArgumentException("sql must not be null.");
        }
        if (window == null) {
            throw new IllegalArgumentException("window must not be null.");
        }

        if (executeSpecial(sql, bindArgs, connectionFlags, cancellationSignal)) {
            window.clear();
            return 0;
        }

        acquireConnection(sql, connectionFlags, cancellationSignal); // might throw
        try {
            return mConnection.executeForCursorWindow(sql, bindArgs,
                    window, startPos, requiredPos, countAllRows,
                    cancellationSignal); // might throw
        } finally {
            releaseConnection(); // might throw
        }
    }

    /**
     * Performs special reinterpretation of certain SQL statements such as "BEGIN",
     * "COMMIT" and "ROLLBACK" to ensure that transaction state invariants are
     * maintained.
     *
     * This function is mainly used to support legacy apps that perform their
     * own transactions by executing raw SQL rather than calling {@link #beginTransaction}
     * and the like.
     *
     * @param sql The SQL statement to execute.
     * @param bindArgs The arguments to bind, or null if none.
     * @param connectionFlags The connection flags to use if a connection must be
     * acquired by this operation.  Refer to {@link SQLiteConnectionPool}.
     * @param cancellationSignal A signal to cancel the operation in progress, or null if none.
     * @return True if the statement was of a special form that was handled here,
     * false otherwise.
     *
     * @throws SQLiteException if an error occurs, such as a syntax error
     * or invalid number of bind arguments.
     * @throws OperationCanceledException if the operation was canceled.
     */
    private boolean executeSpecial(String sql, Object[] bindArgs, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (cancellationSignal != null) {
            cancellationSignal.throwIfCanceled();
        }

        final int type = DatabaseUtils.getSqlStatementType(sql);
        switch (type) {
            case DatabaseUtils.STATEMENT_BEGIN:
                beginTransaction(TRANSACTION_MODE_EXCLUSIVE, null, connectionFlags,
                        cancellationSignal);
                return true;

            case DatabaseUtils.STATEMENT_COMMIT:
                setTransactionSuccessful();
                endTransaction(cancellationSignal);
                return true;

            case DatabaseUtils.STATEMENT_ABORT:
                endTransaction(cancellationSignal);
                return true;
        }
        return false;
    }

    private void acquireConnection(String sql, int connectionFlags,
            CancellationSignal cancellationSignal) {
        if (mConnection == null) {
            assert mConnectionUseCount == 0;
            mConnection = mConnectionPool.acquireConnection(sql, connectionFlags,
                    cancellationSignal); // might throw
            mConnectionFlags = connectionFlags;
        }
        mConnectionUseCount += 1;
    }

    private void releaseConnection() {
        assert mConnection != null;
        assert mConnectionUseCount > 0;
        if (--mConnectionUseCount == 0) {
            try {
                mConnectionPool.releaseConnection(mConnection); // might throw
            } finally {
                mConnection = null;
            }
        }
    }

    private void throwIfNoTransaction() {
        if (mTransactionStack == null) {
            throw new IllegalStateException("Cannot perform this operation because "
                    + "there is no current transaction.");
        }
    }

    private void throwIfTransactionMarkedSuccessful() {
        if (mTransactionStack != null && mTransactionStack.mMarkedSuccessful) {
            throw new IllegalStateException("Cannot perform this operation because "
                    + "the transaction has already been marked successful.  The only "
                    + "thing you can do now is call endTransaction().");
        }
    }

    private void throwIfNestedTransaction() {
        if (hasNestedTransaction()) {
            throw new IllegalStateException("Cannot perform this operation because "
                    + "a nested transaction is in progress.");
        }
    }

    private Transaction obtainTransaction(int mode, SQLiteTransactionListener listener) {
        Transaction transaction = mTransactionPool;
        if (transaction != null) {
            mTransactionPool = transaction.mParent;
            transaction.mParent = null;
            transaction.mMarkedSuccessful = false;
            transaction.mChildFailed = false;
        } else {
            transaction = new Transaction();
        }
        transaction.mMode = mode;
        transaction.mListener = listener;
        return transaction;
    }

    private void recycleTransaction(Transaction transaction) {
        transaction.mParent = mTransactionPool;
        transaction.mListener = null;
        mTransactionPool = transaction;
    }

    private static final class Transaction {
        public Transaction mParent;
        public int mMode;
        public SQLiteTransactionListener mListener;
        public boolean mMarkedSuccessful;
        public boolean mChildFailed;
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteStatement.java.





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/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.os.ParcelFileDescriptor;

/**
 * Represents a statement that can be executed against a database.  The statement
 * cannot return multiple rows or columns, but single value (1 x 1) result sets
 * are supported.
 * <p>
 * This class is not thread-safe.
 * </p>
 */
public final class SQLiteStatement extends SQLiteProgram {
    SQLiteStatement(SQLiteDatabase db, String sql, Object[] bindArgs) {
        super(db, sql, bindArgs, null);
    }

    /**
     * Execute this SQL statement, if it is not a SELECT / INSERT / DELETE / UPDATE, for example
     * CREATE / DROP table, view, trigger, index etc.
     *
     * @throws org.sqlite.database.SQLException If the SQL string is invalid for
     *         some reason
     */
    public void execute() {
        acquireReference();
        try {
            getSession().execute(getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute this SQL statement, if the the number of rows affected by execution of this SQL
     * statement is of any importance to the caller - for example, UPDATE / DELETE SQL statements.
     *
     * @return the number of rows affected by this SQL statement execution.
     * @throws org.sqlite.database.SQLException If the SQL string is invalid for
     *         some reason
     */
    public int executeUpdateDelete() {
        acquireReference();
        try {
            return getSession().executeForChangedRowCount(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute this SQL statement and return the ID of the row inserted due to this call.
     * The SQL statement should be an INSERT for this to be a useful call.
     *
     * @return the row ID of the last row inserted, if this insert is successful. -1 otherwise.
     *
     * @throws org.sqlite.database.SQLException If the SQL string is invalid for
     *         some reason
     */
    public long executeInsert() {
        acquireReference();
        try {
            return getSession().executeForLastInsertedRowId(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute a statement that returns a 1 by 1 table with a numeric value.
     * For example, SELECT COUNT(*) FROM table;
     *
     * @return The result of the query.
     *
     * @throws org.sqlite.database.sqlite.SQLiteDoneException if the query returns zero rows
     */
    public long simpleQueryForLong() {
        acquireReference();
        try {
            return getSession().executeForLong(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Execute a statement that returns a 1 by 1 table with a text value.
     * For example, SELECT COUNT(*) FROM table;
     *
     * @return The result of the query.
     *
     * @throws org.sqlite.database.sqlite.SQLiteDoneException if the query returns zero rows
     */
    public String simpleQueryForString() {
        acquireReference();
        try {
            return getSession().executeForString(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    /**
     * Executes a statement that returns a 1 by 1 table with a blob value.
     *
     * @return A read-only file descriptor for a copy of the blob value, or {@code null}
     *         if the value is null or could not be read for some reason.
     *
     * @throws org.sqlite.database.sqlite.SQLiteDoneException if the query returns zero rows
     */
    public ParcelFileDescriptor simpleQueryForBlobFileDescriptor() {
        acquireReference();
        try {
            return getSession().executeForBlobFileDescriptor(
                    getSql(), getBindArgs(), getConnectionFlags(), null);
        } catch (SQLiteDatabaseCorruptException ex) {
            onCorruption();
            throw ex;
        } finally {
            releaseReference();
        }
    }

    @Override
    public String toString() {
        return "SQLiteProgram: " + getSql();
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteStatementInfo.java.





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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * Describes a SQLite statement.
 *
 * @hide
 */
public final class SQLiteStatementInfo {
    /**
     * The number of parameters that the statement has.
     */
    public int numParameters;

    /**
     * The names of all columns in the result set of the statement.
     */
    public String[] columnNames;

    /**
     * True if the statement is read-only.
     */
    public boolean readOnly;
}






Deleted src/org/sqlite/database/sqlite/SQLiteTableLockedException.java.





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/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

public class SQLiteTableLockedException extends SQLiteException {
    public SQLiteTableLockedException() {}

    public SQLiteTableLockedException(String error) {
        super(error);
    }
}






Deleted src/org/sqlite/database/sqlite/SQLiteTransactionListener.java.





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/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

/**
 * A listener for transaction events.
 */
public interface SQLiteTransactionListener {
    /**
     * Called immediately after the transaction begins.
     */
    void onBegin();

    /**
     * Called immediately before commiting the transaction.
     */
    void onCommit();

    /**
     * Called if the transaction is about to be rolled back.
     */
    void onRollback();
}






Deleted src/org/sqlite/database/sqlite/SqliteWrapper.java.





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/*
 * Copyright (C) 2008 Esmertec AG.
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sqlite.database.sqlite;

import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import org.sqlite.database.sqlite.SQLiteException;
import android.net.Uri;
import android.util.Log;
import android.widget.Toast;

/**
 * @hide
 */

public final class SqliteWrapper {
    private static final String TAG = "SqliteWrapper";
    private static final String SQLITE_EXCEPTION_DETAIL_MESSAGE
                = "unable to open database file";

    private SqliteWrapper() {
        // Forbidden being instantiated.
    }

    // FIXME: need to optimize this method.
    private static boolean isLowMemory(SQLiteException e) {
        return e.getMessage().equals(SQLITE_EXCEPTION_DETAIL_MESSAGE);
    }

    public static void checkSQLiteException(Context context, SQLiteException e) {
        if (isLowMemory(e)) {
            Toast.makeText(context, "low memory", Toast.LENGTH_SHORT).show();
        } else {
            throw e;
        }
    }

    public static Cursor query(Context context, ContentResolver resolver, Uri uri,
            String[] projection, String selection, String[] selectionArgs, String sortOrder) {
        try {
            return resolver.query(uri, projection, selection, selectionArgs, sortOrder);
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when query: ", e);
            checkSQLiteException(context, e);
            return null;
        }
    }

    public static boolean requery(Context context, Cursor cursor) {
        try {
            return cursor.requery();
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when requery: ", e);
            checkSQLiteException(context, e);
            return false;
        }
    }
    public static int update(Context context, ContentResolver resolver, Uri uri,
            ContentValues values, String where, String[] selectionArgs) {
        try {
            return resolver.update(uri, values, where, selectionArgs);
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when update: ", e);
            checkSQLiteException(context, e);
            return -1;
        }
    }

    public static int delete(Context context, ContentResolver resolver, Uri uri,
            String where, String[] selectionArgs) {
        try {
            return resolver.delete(uri, where, selectionArgs);
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when delete: ", e);
            checkSQLiteException(context, e);
            return -1;
        }
    }

    public static Uri insert(Context context, ContentResolver resolver,
            Uri uri, ContentValues values) {
        try {
            return resolver.insert(uri, values);
        } catch (SQLiteException e) {
            Log.e(TAG, "Catch a SQLiteException when insert: ", e);
            checkSQLiteException(context, e);
            return null;
        }
    }
}






Deleted src/org/sqlite/database/sqlite/package.html.





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<HTML>
<BODY>
Contains the SQLite database management
classes that an application would use to manage its own private database.
<p>
Applications use these classes to manage private databases. If creating a
content provider, you will probably have to use these classes to create and
manage your own database to store content. See <a
href="{@docRoot}guide/topics/providers/content-providers.html">Content Providers</a> to learn
the conventions for implementing a content provider. See the
NotePadProvider class in the NotePad sample application in the SDK for an
example of a content provider. Android ships with SQLite version 3.4.0
<p>If you are working with data sent to you by a provider, you will not use
these SQLite classes, but instead use the generic {@link android.database}
classes.
<p>Android ships with the sqlite3 database tool in the <code>tools/</code>
folder. You can use this tool to browse or run SQL commands on the device. Run by
typing <code>sqlite3</code> in a shell window.
</BODY>
</HTML>






Added www/index.wiki.










































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<h1> 
SQLite Android Bindings 
</h1>

<p> The SQLite library is a core part of the Android environment. Java
applications and content providers access SQLite using the interface in
the 
<a href="http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html">android.database.sqlite</a> namespace.

<p> For most applications, this is convenient and works well. However,
it means that applications must be content with the SQLite version and
build installed on the target device as part of the operating system.
If your application happens to require a newer version of SQLite, or a build
with a custom extension or <a href=http://www.sqlite.org/vfs.html>VFS</a>
installed, you're out of luck. 

<p> One solution is to bundle the SQLite library directly into the 
application, bypassing the version built-in to Android. This project,
the <i>SQLite Android bindings</i>, provides an easy way to do just
that. This allows an application to use a custom build or version of 
SQLite, regardless of the Android version to which it is deployed, while
continuing to use the standard Android interface.

Available User Documentation:

  *  [./install.wiki | Installation Guide ] - this page describes the various
     ways the the SQLite Android bindings may be integrated with an
     application.

  *  [./usage.wiki | Application Programming ] - this page describes the
     very minor code modifications required to use the SQLite Android bindings
     instead of Android's built-in SQLite support.

  *  [./see.wiki | Using the Simple Encryption Extension (SEE) ] - extra notes
  regarding the use of the proprietary encryption extension SEE.







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<h1>Installation</h1>


<p> There are three ways to add the SQLite Android bindings to an application:

<ol>
  <li> By adding a pre-built aar file to the applications 
  <a href=https://developer.android.com/studio/index.html>Android Studio</a>
       project.

  <li> By building an aar file, then adding it to the applications Android
       Studio project as in (1).

  <li> By adding the SQLite Android bindings source code to and building it 
       along with the other application code.
</ol>

<p> By default, the SQLite Android bindings support Android API levels 16 
and greater (Android versions 4.1 and up). There is also a separate version
that supports Android API levels 15 and greater (Android version 4.0.2 and 
up). Please note the extra step involved in [#obtaincode|obtaining the code] 
if you wish to use the version compatible with API level 15.

<h2> <a name=prebuilt></a> 1. Using a Pre-Built aar File</h2>

<p>
  This is the most straightforward option. An "aar" file is similar to a 
  jar file, except that it may contain both compiled java classes and 
  native code. An aar file for the latest SQLite release usable with
  API levels 16 and up is available from 
  <a href=http://sqlite.org/download.html>this page</a>.
  
<p>
  There are two steps involved in adding an aar file to an Android Studio
  project:

<p>
  <ol>
    <li> <b>Import the module</b>. In Android Studio 2.1 this is
    accomplished by selecting the <code>"File" -> "New" -> "New
    Module..."</code> menu and then choosing <code>"Import JAR/AAR
    Package"</code>.

    <li> <b>Add a dependency on the new module to the main application</b>
    module (or to all modules that will use the SQLite Android bindings).  In
    Android Studio 2.1 the dependency may be created using the project
    structure dialog (select <code>"File" -> "Project Structure..."</code>) or
    by adding code similar to the following to the application modules
    <code>build.gradle</code> file: <verbatim>
    dependencies {
        // Change "sqlite-android-3130000" to the name of the new module!
        compile project(':sqlite-android-3130000')
    }</verbatim>
</ol>

<p> A more detailed description of using the steps above to create a very 
    simple applictation is [./verysimpleapp.wiki | available here].

<p>
  At time of writing, aar files may only be used directly in Android Studio
  projects, not projects created using other IDEs (e.g. Eclipse, IntelliJ
  IDEA). However, an aar is just a zip archive containing a
  <code>classes.jar</code> file that in turn contains the SQLite Android
  binding java classes and a <code>jni/</code> directory that contains the 
  native library for each platform.  By extracting these two things from the 
  aar file and adding them to the project separately it is often possible to 
  use an aar file in non-Android Studio projects.

<h2>2. <a name=customaar></a> Building a Custom aar File</h2>

<p>
  Building a custom aar file requires both the Android SDK and NDK. 

<ol>
  <li><a name=obtaincode></a><b>Obtain the code</b>. The code for the SQLite Android bindings may
  be obtained either by checking out 
  the <a href=http://fossil-scm.org>fossil</a> repository, or by downloading
  a zip file.
  <p>
  To obtain the code using fossil, use the following series of commands.
  In this case, the "project directory" refered to in subsequent steps is
  the <code>sqlite</code> directory created by the second command below:
  <p>
  <verbatim>
    $ fossil clone http://www.sqlite.org/android android.fossil
    $ mkdir sqlite
    $ cd sqlite
    $ fossil open ../android.fossil</verbatim>
  <p>
  Alternatively, the latest code may be downloaded as a 
  <a href=http://www.sqlite.org/android/zip/SQLite+Android+Bindings.zip?uuid=trunk>zip archive</a>. 
  In this case, the "project directory" is the
  <code>SQLite_Android_Bindings/</code> directory created by unzipping the
  downloaded archive.
  <p>
  <i>API level 15 users:</i> The code for the version that is
  compatible with Android API level 15 may be obtained as a zip
  file 
  <a href=http://www.sqlite.org/android/zip/SQLite+Android+Bindings.zip?uuid=api-level-15>from here</a>.
  Or, if using fossil, the <code>fossil open</code> command above should be
  replaced with: 
  <verbatim>
    $ fossil open ../android.fossil api-level-15</verbatim>

  <li><a name=buildnative></a> <b>Build the native libraries.</b>
  <p> To build the native libraries, navigate to the
      <code>sqlite3/src/main/</code> directory of the project directory and
      run the <code>ndk-build</code> command. For example, on Linux if 
      Android Studio and the NDK are installed using their default paths:
<verbatim>
    $ cd sqlite3/src/main
    $ ~/Android/Sdk/ndk-bundle/ndk-build</verbatim>
  <p> On modern hardware, this command takes roughly 2 minutes to build the
      native libraries for all Android architectures.
  <p> 
  The latest release of the public domain SQLite library comes bundled 
  with the SQLite Android bindings code downloaded in step 1. If you wish
  to use a different version of SQLite, for example one that contains the
  proprietry [./see.wiki | SEE extension], then replace the <code>sqlite3.c</code>
  and <code>sqlite3.h</code> files at the following locations before running
  the <code>ndk-build</code> command:

<verbatim>
    sqlite3/src/main/jni/sqlite/sqlite3.c
    sqlite3/src/main/jni/sqlite/sqlite3.h</verbatim>
  <p> 
  If you wish to build the SQLite library with non-standard command line
  switches, for example the -DSQLITE_ENABLE_FTS5 switch used to enable 
  <a href=http://www.sqlite.org/fts5.html>FTS5</a>, they should be added to
  the <code>Android.mk</code> file at this location:

<verbatim>
    sqlite3/src/main/jni/sqlite/Android.mk</verbatim>
  <p>
  If the <code>Android.mk</code> or <code>sqlite3.&#91;ch&#93;</code> files
  are edited after <code>ndk-build</code> is run, it may be necessary to run
  the <code>ndk-build clean</code> command before rerunning 
  <code>ndk-build</code> to ensure a correct build.
  <p>
  Once <code>ndk-build</code> has been run successfully, unless you modify
  the <code>Android.mk</code> or <code>sqlite3.&#91;ch&#93;</code> files,
  it should not be necessary to run it again. It <i>does not</i> have to be 
  run each time the application is rebuilt.

  <li> <b>Assemble the aar file</b>. To assemble the aar file using the 
  command line, first set environment variable ANDROID_HOME to the SDK
  directory, then run the gradle "assembleRelease" target from within the
  "sqlite3" sub-directory of the project directory. For example:
<verbatim>
    $ export ANDROID_HOME=~/Android/Sdk/
    $ cd sqlite3
    $ ../gradlew assembleRelease</verbatim>
  <p>
  Assembling an aar file using Android Studio is similar. Open the SQLite
  Android bindings project using Android Studio, run a "gradle sync", then
  run the "assembleRelease" gradle task within the "sqlite3" module.
  <p>
  Using either the command line or Android Studio to run the gradle task
  causes the aar file to be created at:
  <code>sqlite3/build/outputs/aar/sqlite3-release.aar</code>.
  <p>
  Once the custom aar file has been created, it may be used in an Android
  Studio application as described above. The aar file should be roughly
  4.5MB in size. If it is much smaller than this (closer to 100KB), this
  indicates that the aar file is missing the native libraries. The usual
  cause of this is an unnoticed error while building the native libraries 
  (step 2 above).
</ol>

<h2> <a name=directint></a> 3. Adding Source Code Directly to the Application</h2>

<p>
The SQLite Android bindings code may also be added directly to the 
application project, so that it is built and deployed in the same way 
as all other application code.

<p>
To copy the SQLite Android bindings code into an application:

<ol>
  <li> Obtain the code in the same way as [#obtaincode | described above].

  <li> Recursively copy the contents of the <code>sqlite3/main/src/jni/</code>
       directory into the application or application modules <code>jni/</code> 
       directory. Then, from the parent of the <code>jni/</code> directory, run
       the <code>ndk-build</code> command, as [#buildnative | described here]. 

  <li> Recursively copy the contents of the <code>sqlite3/main/src/java/</code>
       directory to whereever the application java code is.
</ol>









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<h1>Using The SQLite Encryption Extension</h1>

<p>
  The <a href=http://www.sqlite.org/see/doc/trunk/www/readme.wiki>The SQLite Encryption Extension</a> 
  provides an easy way to create, read and write encrypted database files.
  It may be used with the SQLite Android bindings to add encrypted database
  capability to any application.

<h2> Building a SEE Enabled Version </h2>
<p>
Unless you are using a [./install.wiki#prebuilt | pre-built aar file] to use
the SEE extension with the SQLite Android bindings you will need to build
a custom version, either as a [./install.wiki#customaar | custom aar file]
or by [./install.wiki#directint|directly integrating] the code with the application.
<p>
To do this, follow the instructions linked above. Except, before running
the <code>ndk-build</code> command to build the native libraries:

<ol>
  <li> Replace the <code>sqlite3.c</code> and <code>sqlite3.h</code> files
  with the SEE enable versions (i.e. the concatenation of sqlite3.c and see.c -
  refer to the link above for details). 

  <li> Edit the Android.mk file so as to uncomment the second of the two
  lines reproduced below:

<verbatim>
  # If using SEE, uncomment the following:
  # LOCAL_CFLAGS += -DSQLITE_HAS_CODEC
</verbatim>
</ol>

<h2> Application Code Notes </h2>

<p>
  After opening or creating an encrypted database, the application must
  immediately execute a PRAGMA to configure the encryption key. This must
  be done before any other database methods are called. For example:

<verbatim>
  import org.sqlite.database.sqlite.SQLiteDatabase;

    ...

  SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase("my.db", null);
  db.execSQL("PRAGMA key = 'secretkey'");
</verbatim>

<p>
  Or, if you are using the
  <a href=http://developer.android.com/reference/android/database/sqlite/SQLiteOpenHelper.html>SQLiteOpenHelper</a>
  helper class, the PRAGMA must be the first thing executed within the
  onConfigure() callback. For example:

<verbatim>
  import org.sqlite.database.sqlite.SQLiteDatabase;
  import org.sqlite.database.sqlite.SQLiteHelper;

    ...

  class MyHelper extends SQLiteOpenHelper {
    ...
    void onConfigure(SQLiteDatabase db){
      db.execSQL("PRAGMA key = 'secretkey'");
    }
    ...
  }
</verbatim>

<p>
  Refer to the <a href=http://www.sqlite.org/see/doc/trunk/www/readme.wiki>
  SEE documentation</a> for further details regarding encryption keys.

<p>Aside from supporting encrypted databases, SEE-enabled builds behave
differently in two more respects:

<ol>
  <li> <p>The SQLiteDatabase.<a href="http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html#enableWriteAheadLogging()">enableWriteAheadLogging()</a> method does not enable
       connection pooling. It is not possible for connection pooling to be
       used with a SEE-enabled build (even if the database is unencrypted).

  <li> <p>In Android, if database corruption is encountered, or if an attempt is
       made to open a file that is not an SQLite database, the default
       behaviour is to delete the file and create an empty database file in 
       its place. In a SEE-enabled build, the default behaviour is to throw
       an exception.<br><br>
       The reason for this is that supplying an incorrect encryption key
       is indistinguishable from opening a file that is not a database file.
       And it seems too dangerous to simply delete the file in this case.
       <br><br>
       The default behaviour can be overriden using the
       <a href="http://developer.android.com/reference/android/database/DatabaseErrorHandler.html">DatabaseErrorHandler</a> interface.
</ol>






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<h1>Application Programming</h1>

<h2>Loading the Shared Library</h2>

<p>
  Before using any SQLite related methods or objects, the native SQLite
  library must be loaded into the application using the following code:

<verbatim>
  System.loadLibrary("sqliteX");
</verbatim>

<p>
  One way to ensure that the shared library is loaded early enough is
  to add it to a "static" block within the declaration of the application's
  main Activity class.

<h2>Using the SQLite Android bindings classes</h2>

<p>
  The classes that make up the built-in Android SQLite interface reside in
  the "android.database.sqlite" namespace. This interface provides all of
  the same classes, except within the "org.sqlite.database.sqlite" namespace.
  This means that to modify an application to use the custom version of 
  SQLite, all that is usually required is to replace all occurrences
  "android.database.sqlite" within the source code with
  "org.sqlite.database.sqlite". For example, the following:

<verbatim>
  import android.database.sqlite.SQLiteDatabase;
</verbatim>

<p>should be replaced with:

<verbatim>
  import org.sqlite.database.sqlite.SQLiteDatabase;
</verbatim>

<p>
  As well as replacing all uses of the classes in the 
  android.database.sqlite.* namespace, the application must also be sure 
  to use the following two:

<verbatim>
  org.sqlite.database.SQLException
  org.sqlite.database.DatabaseErrorHandler
</verbatim>

<p>instead of:

<verbatim>
  android.database.SQLException
  android.database.DatabaseErrorHandler
</verbatim>

<h2>Differences From the Built-in SQLite Support</h2>
  
<p>Aside from namespace changes, there are other differences from the
stock Android interface that applications need to be aware of:

<ol>
  <li> The SQLiteStatement.<a href="http://developer.android.com/reference/android/database/sqlite/SQLiteStatement.html#simpleQueryForBlobFileDescriptor()">simpleQueryForBlobFileDescriptor()</a> 
       API is not available.

  <li> The collation sequence "UNICODE" is not available.

  <li> The collation sequence "LOCALIZED", which normally changes with the 
       system's current locale, is always equivalent to SQLite's built
       in collation BINARY.
</ol>








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<h1>Very Simple App</h1>

<p>
1. Create a new project in Android Studio. Use the "Basic Activity" template.
Leave all other settings at their defaults.

<p style="margin:3ex 0 3ex 0">
<img align=left width=45% margin=20 src=vsa/1newproject.png>
<img align=left width=45% src=vsa/2newproject.png>
<p style="clear:both">
<img align=left width=45% src=vsa/3newproject.png>
<img align=left width=45% src=vsa/4newproject.png>
<br style="clear:both">

<p style="margin:3ex 0 3ex 0">
2. Modify the code in MainActivity.java as follows:

<p>
<img align=left width=45% src=vsa/1editmainactivity.png>
<br style="clear:both">

<p style="margin:3ex 0 3ex 0">
3. Set the name of the TextView widget in MainActivity to "tv_widget".

<p>
<img align=left width=45% src=vsa/1setwidgetid.png>
<br style="clear:both">

<p style="margin:3ex 0 3ex 0">
4. Import the pre-built SQLite aar file:

<p>
<img align=left width=45% src=vsa/1importmodule.png>
<img align=left width=45% src=vsa/2importmodule.png>
<p style="clear:both">
<img align=left width=45% src=vsa/3importmodule.png>
<br style="clear:both">

<p style="margin:3ex 0 3ex 0">
5. Add the dependency on the new module to the application module:

<p>
<img align=left width=45% src=vsa/1adddep.png>
<img align=left width=45% src=vsa/2adddep.png>
<p style="clear:both">
<img align=left width=45% src=vsa/3adddep.png>
<br style="clear:both">

<p style="margin:3ex 0 3ex 0">
6. The very simple app is now ready to build! Click the green triangle on the
toolbar to build, deploy and run it.

<p>
<img align=left width=45% src=vsa/1build.png>
<br style="clear:both">







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