SQLite

/*
** SQLite uses this code for testing only.  It is not a part of
** the SQLite library.  This file implements two new TCL commands
** "md5" and "md5file" that compute md5 checksums on arbitrary text
** and on complete files.  These commands are used by the "testfixture"
** program to help verify the correct operation of the SQLite library.
**
** The original use of these TCL commands was to test the ROLLBACK
** feature of SQLite.  First compute the MD5-checksum of the database.
** Then make some changes but rollback the changes rather than commit
** them.  Compute a second MD5-checksum of the file and verify that the
** two checksums are the same.  Such is the original use of this code.
** New uses may have been added since this comment was written.
**
** $Id: md5.c,v 1.17 2008/05/16 04:51:55 danielk1977 Exp $
*/
/*
 * This code implements the MD5 message-digest algorithm.
 * The algorithm is due to Ron Rivest.  This code was
 * written by Colin Plumb in 1993, no copyright is claimed.
 * This code is in the public domain; do with it what you wish.
 *

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains OS interface code that is common to all
** architectures.
**
** $Id: os.c,v 1.108 2008/05/16 04:51:55 danielk1977 Exp $
*/
#define _SQLITE_OS_C_ 1
#include "sqliteInt.h"
#undef _SQLITE_OS_C_

/*
** The default SQLite sqlite3_vfs implementations do not allocate

**
** This header file (together with is companion C source-code file
** "os.c") attempt to abstract the underlying operating system so that
** the SQLite library will work on both POSIX and windows systems.
**
** This header file is #include-ed by sqliteInt.h and thus ends up
** being included by every source file.
**
** $Id: os.h,v 1.99 2008/05/16 04:51:55 danielk1977 Exp $
*/
#ifndef _SQLITE_OS_H_
#define _SQLITE_OS_H_

/*
** Figure out if we are dealing with Unix, Windows, or some other
** operating system.  After the following block of preprocess macros,

**
** This file contains macros and a little bit of code that is common to
** all of the platform-specific files (os_*.c) and is #included into those
** files.
**
** This file should be #included by the os_*.c files only.  It is not a
** general purpose header file.
**
** $Id: os_common.h,v 1.36 2008/05/16 04:51:55 danielk1977 Exp $
*/

/*
** At least two bugs have slipped in because we changed the MEMORY_DEBUG
** macro to SQLITE_DEBUG and some older makefiles have not yet made the
** switch.  The following code should catch this problem at compile-time.
*/

/*
** 2006 Feb 14
**
** 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 file contains code that is specific to OS/2.
**
** $Id: os_os2.c,v 1.39 2008/05/16 04:51:55 danielk1977 Exp $
*/

#include "sqliteInt.h"

#if OS_OS2

/*

/*
** 2004 May 22
**
** 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 file contains code that is specific to Unix systems.
**
** $Id: os_unix.c,v 1.182 2008/05/16 04:51:55 danielk1977 Exp $
*/
#include "sqliteInt.h"
#if OS_UNIX              /* This file is used on unix only */

/* #define SQLITE_ENABLE_LOCKING_STYLE 0 */

/*

/*
** 2004 May 22
**
** 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 file contains code that is specific to windows.
**
** $Id: os_win.c,v 1.122 2008/05/16 04:51:55 danielk1977 Exp $
*/
#include "sqliteInt.h"
#if OS_WIN               /* This file is used for windows only */


/*
** A Note About Memory Allocation:

/*
** The "printf" code that follows dates from the 1980's.  It is in
** the public domain.  The original comments are included here for
** completeness.  They are very out-of-date but might be useful as
** an historical reference.  Most of the "enhancements" have been backed
** out so that the functionality is now the same as standard printf().
**
** $Id: printf.c,v 1.85 2008/05/16 04:51:55 danielk1977 Exp $
**
**************************************************************************
**
** The following modules is an enhanced replacement for the "printf" subroutines
** found in the standard C library.  The following enhancements are
** supported:
**

*************************************************************************
** This file contains the sqlite3_get_table() and sqlite3_free_table()
** interface routines.  These are just wrappers around the main
** interface routine of sqlite3_exec().
**
** These routines are in a separate files so that they will not be linked
** if they are not used.
**
** $Id: table.c,v 1.35 2008/05/16 04:51:55 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <stdlib.h>
#include <string.h>

#ifndef SQLITE_OMIT_GET_TABLE

**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains code that modified the OS layer in order to simulate
** the effect on the database file of an OS crash or power failure.  This
** is used to test the ability of SQLite to recover from those situations.
**
** $Id: test6.c,v 1.37 2008/05/16 04:51:55 danielk1977 Exp $
*/
#if SQLITE_TEST          /* This file is used for testing only */
#include "sqliteInt.h"
#include "tcl.h"

#ifndef SQLITE_OMIT_DISKIO  /* This file is a no-op if disk I/O is disabled */

/*
** 2005 December 14
**
** 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.
**
*************************************************************************
**
** $Id: test_async.c,v 1.42 2008/05/16 04:51:55 danielk1977 Exp $
**
** This file contains an example implementation of an asynchronous IO 
** backend for SQLite.
**
** WHAT IS ASYNCHRONOUS I/O?
**
** With asynchronous I/O, write requests are handled by a separate thread

**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains code that modified the OS layer in order to simulate
** different device types (by overriding the return values of the 
** xDeviceCharacteristics() and xSectorSize() methods).
**
** $Id: test_devsym.c,v 1.4 2008/05/16 04:51:55 danielk1977 Exp $
*/
#if SQLITE_TEST          /* This file is used for testing only */

#include "sqlite3.h"
#include "sqliteInt.h"

/*

/*
** SQLite uses this code for testing only.  It is not a part of
** the SQLite library.  This file implements two new TCL commands
** "md5" and "md5file" that compute md5 checksums on arbitrary text
** and on complete files.  These commands are used by the "testfixture"
** program to help verify the correct operation of the SQLite library.
**
** The original use of these TCL commands was to test the ROLLBACK
** feature of SQLite.  First compute the MD5-checksum of the database.
** Then make some changes but rollback the changes rather than commit
** them.  Compute a second MD5-checksum of the file and verify that the
** two checksums are the same.  Such is the original use of this code.
** New uses may have been added since this comment was written.
**
** $Id: test_md5.c,v 1.8 2008/05/16 04:51:55 danielk1977 Exp $
*/
/*
 * This code implements the MD5 message-digest algorithm.
 * The algorithm is due to Ron Rivest.  This code was
 * written by Colin Plumb in 1993, no copyright is claimed.
 * This code is in the public domain; do with it what you wish.
 *

/*
** 2007 September 14
**
** 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.
**
*************************************************************************
**
** $Id: test_onefile.c,v 1.6 2008/05/16 04:51:55 danielk1977 Exp $
**
** OVERVIEW:
**
**   This file contains some example code demonstrating how the SQLite 
**   vfs feature can be used to have SQLite operate directly on an 
**   embedded media, without using an intermediate file system.
**

**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains the implementation of an SQLite vfs wrapper that
** adds instrumentation to all vfs and file methods. C and Tcl interfaces
** are provided to control the instrumentation.
**
** $Id: test_osinst.c,v 1.11 2008/05/16 04:51:55 danielk1977 Exp $
*/

/*
** C interface:
**
**   sqlite3_instvfs_create()
**   sqlite3_instvfs_destroy()

/*
** 2006 January 07
**
** 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.
**
******************************************************************************
**
** $Id: test_server.c,v 1.7 2008/05/16 04:51:55 danielk1977 Exp $
**
** This file contains demonstration code.  Nothing in this file gets compiled
** or linked into the SQLite library unless you use a non-standard option:
**
**      -DSQLITE_SERVER=1
**
** The configure script will never generate a Makefile with the option

/*
**
** 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.
**
*************************************************************************
**
**
** $Id: trigger.c,v 1.126 2008/05/16 04:51:55 danielk1977 Exp $
*/
#include "sqliteInt.h"

#ifndef SQLITE_OMIT_TRIGGER
/*
** Delete a linked list of TriggerStep structures.
*/

**
*************************************************************************
** This is the header file for information that is private to the
** VDBE.  This information used to all be at the top of the single
** source code file "vdbe.c".  When that file became too big (over
** 6000 lines long) it was split up into several smaller files and
** this header information was factored out.
**
** $Id: vdbeInt.h,v 1.146 2008/05/16 04:51:55 danielk1977 Exp $
*/
#ifndef _VDBEINT_H_
#define _VDBEINT_H_

/*
** intToKey() and keyToInt() used to transform the rowid.  But with
** the latest versions of the design they are no-ops.

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains code use to implement APIs that are part of the
** VDBE.
**
** $Id: vdbeapi.c,v 1.131 2008/05/16 04:51:55 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "vdbeInt.h"

#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
/*
** The following structure contains pointers to the end points of a

/*
** 2005 June 16
**
** 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 file implements a FIFO queue of rowids used for processing
** UPDATE and DELETE statements.
**
** $Id: vdbefifo.c,v 1.6 2008/05/16 04:51:55 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "vdbeInt.h"

/*
** Constants FIFOSIZE_FIRST and FIFOSIZE_MAX are the initial
** number of entries in a fifo page and the maximum number of

**
*************************************************************************
**
** This file contains code use to manipulate "Mem" structure.  A "Mem"
** stores a single value in the VDBE.  Mem is an opaque structure visible
** only within the VDBE.  Interface routines refer to a Mem using the
** name sqlite_value
**
** $Id: vdbemem.c,v 1.115 2008/05/16 04:51:55 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** Call sqlite3VdbeMemExpandBlob() on the supplied value (type Mem*)