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SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

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Overview
Comment:Merge latest trunk changes with this branch.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | server-process-edition
Files: files | file ages | folders
SHA3-256: 216c757f9289af818482253f77b0b2c9b09e8a478caf67d70a4a6da2fabbc642
User & Date: dan 2017-07-07 16:40:28
Context
2017-07-08
20:46
Support read-only MVCC transactions in server-mode. Started using "BEGIN READONLY". check-in: 5a043aa8 user: dan tags: server-process-edition
2017-07-07
16:40
Merge latest trunk changes with this branch. check-in: 216c757f user: dan tags: server-process-edition
16:12
Have this branch maintain an in-memory hash-table of old pages for read-only MVCC clients. There is no way to access it yet. check-in: a3a9a2e1 user: dan tags: server-process-edition
16:09
In lsmtest, use an empty string instead of ":memory:" when requesting a temporary database from SQLite. This prevents other test code from trying to unlink() ":memory:", which fails on win32. check-in: 281ad505 user: dan tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to Makefile.in.

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         icu.lo insert.lo json1.lo legacy.lo loadext.lo \
         main.lo malloc.lo mem0.lo mem1.lo mem2.lo mem3.lo mem5.lo \
         memjournal.lo \
         mutex.lo mutex_noop.lo mutex_unix.lo mutex_w32.lo \
         notify.lo opcodes.lo os.lo os_unix.lo os_win.lo \
         pager.lo parse.lo pcache.lo pcache1.lo pragma.lo prepare.lo printf.lo \
         random.lo resolve.lo rowset.lo rtree.lo \
         sqlite3session.lo select.lo sqlite3rbu.lo status.lo \
         table.lo threads.lo tokenize.lo treeview.lo trigger.lo \
         update.lo util.lo vacuum.lo \
         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbesort.lo \
         vdbetrace.lo wal.lo walker.lo where.lo wherecode.lo whereexpr.lo \
         utf.lo vtab.lo

# Object files for the amalgamation.
................................................................................
SRC += \
  $(TOP)/ext/session/sqlite3session.c \
  $(TOP)/ext/session/sqlite3session.h
SRC += \
  $(TOP)/ext/rbu/sqlite3rbu.h \
  $(TOP)/ext/rbu/sqlite3rbu.c
SRC += \
  $(TOP)/ext/misc/json1.c


# Generated source code files
#
SRC += \
  keywordhash.h \
  opcodes.c \
  opcodes.h \
................................................................................

# Extra compiler options for various shell tools
#
SHELL_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_FTS4
# SHELL_OPT += -DSQLITE_ENABLE_FTS5
SHELL_OPT += -DSQLITE_ENABLE_EXPLAIN_COMMENTS
SHELL_OPT += -DSQLITE_ENABLE_UNKNOWN_SQL_FUNCTION

FUZZERSHELL_OPT = -DSQLITE_ENABLE_JSON1
FUZZCHECK_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_OSS_FUZZ
FUZZCHECK_OPT += -DSQLITE_MAX_MEMORY=50000000
FUZZCHECK_SRC = $(TOP)/test/fuzzcheck.c $(TOP)/test/ossfuzz.c
DBFUZZ_OPT = 

# This is the default Makefile target.  The objects listed here
................................................................................

sqlite3session.lo:	$(TOP)/ext/session/sqlite3session.c $(HDR) $(EXTHDR)
	$(LTCOMPILE) -DSQLITE_CORE -c $(TOP)/ext/session/sqlite3session.c

json1.lo:	$(TOP)/ext/misc/json1.c
	$(LTCOMPILE) -DSQLITE_CORE -c $(TOP)/ext/misc/json1.c




# FTS5 things
#
FTS5_SRC = \
   $(TOP)/ext/fts5/fts5.h \
   $(TOP)/ext/fts5/fts5Int.h \
   $(TOP)/ext/fts5/fts5_aux.c \
   $(TOP)/ext/fts5/fts5_buffer.c \
................................................................................
# hidden when the library is built via the amalgamation).
#
TESTFIXTURE_FLAGS  = -DTCLSH=1 -DSQLITE_TEST=1 -DSQLITE_CRASH_TEST=1
TESTFIXTURE_FLAGS += -DSQLITE_SERVER=1 -DSQLITE_PRIVATE="" -DSQLITE_CORE 
TESTFIXTURE_FLAGS += -DBUILD_sqlite
TESTFIXTURE_FLAGS += -DSQLITE_SERIES_CONSTRAINT_VERIFY=1
TESTFIXTURE_FLAGS += -DSQLITE_DEFAULT_PAGE_SIZE=1024


TESTFIXTURE_SRC0 = $(TESTSRC2) libsqlite3.la
TESTFIXTURE_SRC1 = sqlite3.c
TESTFIXTURE_SRC = $(TESTSRC) $(TOP)/src/tclsqlite.c
TESTFIXTURE_SRC += $(TESTFIXTURE_SRC$(USE_AMALGAMATION))

testfixture$(TEXE):	$(TESTFIXTURE_SRC)







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         icu.lo insert.lo json1.lo legacy.lo loadext.lo \
         main.lo malloc.lo mem0.lo mem1.lo mem2.lo mem3.lo mem5.lo \
         memjournal.lo \
         mutex.lo mutex_noop.lo mutex_unix.lo mutex_w32.lo \
         notify.lo opcodes.lo os.lo os_unix.lo os_win.lo \
         pager.lo parse.lo pcache.lo pcache1.lo pragma.lo prepare.lo printf.lo \
         random.lo resolve.lo rowset.lo rtree.lo \
         sqlite3session.lo select.lo sqlite3rbu.lo status.lo stmt.lo \
         table.lo threads.lo tokenize.lo treeview.lo trigger.lo \
         update.lo util.lo vacuum.lo \
         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbesort.lo \
         vdbetrace.lo wal.lo walker.lo where.lo wherecode.lo whereexpr.lo \
         utf.lo vtab.lo

# Object files for the amalgamation.
................................................................................
SRC += \
  $(TOP)/ext/session/sqlite3session.c \
  $(TOP)/ext/session/sqlite3session.h
SRC += \
  $(TOP)/ext/rbu/sqlite3rbu.h \
  $(TOP)/ext/rbu/sqlite3rbu.c
SRC += \
  $(TOP)/ext/misc/json1.c \
  $(TOP)/ext/misc/stmt.c

# Generated source code files
#
SRC += \
  keywordhash.h \
  opcodes.c \
  opcodes.h \
................................................................................

# Extra compiler options for various shell tools
#
SHELL_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_FTS4
# SHELL_OPT += -DSQLITE_ENABLE_FTS5
SHELL_OPT += -DSQLITE_ENABLE_EXPLAIN_COMMENTS
SHELL_OPT += -DSQLITE_ENABLE_UNKNOWN_SQL_FUNCTION
SHELL_OPT += -DSQLITE_ENABLE_STMTVTAB
FUZZERSHELL_OPT = -DSQLITE_ENABLE_JSON1
FUZZCHECK_OPT = -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_MEMSYS5 -DSQLITE_OSS_FUZZ
FUZZCHECK_OPT += -DSQLITE_MAX_MEMORY=50000000
FUZZCHECK_SRC = $(TOP)/test/fuzzcheck.c $(TOP)/test/ossfuzz.c
DBFUZZ_OPT = 

# This is the default Makefile target.  The objects listed here
................................................................................

sqlite3session.lo:	$(TOP)/ext/session/sqlite3session.c $(HDR) $(EXTHDR)
	$(LTCOMPILE) -DSQLITE_CORE -c $(TOP)/ext/session/sqlite3session.c

json1.lo:	$(TOP)/ext/misc/json1.c
	$(LTCOMPILE) -DSQLITE_CORE -c $(TOP)/ext/misc/json1.c

stmt.lo:	$(TOP)/ext/misc/stmt.c
	$(LTCOMPILE) -DSQLITE_CORE -c $(TOP)/ext/misc/stmt.c

# FTS5 things
#
FTS5_SRC = \
   $(TOP)/ext/fts5/fts5.h \
   $(TOP)/ext/fts5/fts5Int.h \
   $(TOP)/ext/fts5/fts5_aux.c \
   $(TOP)/ext/fts5/fts5_buffer.c \
................................................................................
# hidden when the library is built via the amalgamation).
#
TESTFIXTURE_FLAGS  = -DTCLSH=1 -DSQLITE_TEST=1 -DSQLITE_CRASH_TEST=1
TESTFIXTURE_FLAGS += -DSQLITE_SERVER=1 -DSQLITE_PRIVATE="" -DSQLITE_CORE 
TESTFIXTURE_FLAGS += -DBUILD_sqlite
TESTFIXTURE_FLAGS += -DSQLITE_SERIES_CONSTRAINT_VERIFY=1
TESTFIXTURE_FLAGS += -DSQLITE_DEFAULT_PAGE_SIZE=1024
TESTFIXTURE_FLAGS += -DSQLITE_ENABLE_STMTVTAB

TESTFIXTURE_SRC0 = $(TESTSRC2) libsqlite3.la
TESTFIXTURE_SRC1 = sqlite3.c
TESTFIXTURE_SRC = $(TESTSRC) $(TOP)/src/tclsqlite.c
TESTFIXTURE_SRC += $(TESTFIXTURE_SRC$(USE_AMALGAMATION))

testfixture$(TEXE):	$(TESTFIXTURE_SRC)

Changes to Makefile.msc.

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  $(TOP)\ext\fts3\fts3_unicode.c \
  $(TOP)\ext\fts3\fts3_unicode2.c \
  $(TOP)\ext\fts3\fts3_write.c \
  $(TOP)\ext\icu\icu.c \
  $(TOP)\ext\rtree\rtree.c \
  $(TOP)\ext\session\sqlite3session.c \
  $(TOP)\ext\rbu\sqlite3rbu.c \
  $(TOP)\ext\misc\json1.c


# Extension header files, part 1.
#
SRC08 = \
  $(TOP)\ext\fts1\fts1.h \
  $(TOP)\ext\fts1\fts1_hash.h \
  $(TOP)\ext\fts1\fts1_tokenizer.h \
................................................................................
  $(TOP)\test\fuzzdata5.db
# <</mark>>

# Additional compiler options for the shell.  These are only effective
# when the shell is not being dynamically linked.
#
!IF $(DYNAMIC_SHELL)==0 && $(FOR_WIN10)==0
SHELL_COMPILE_OPTS = $(SHELL_COMPILE_OPTS) -DSQLITE_SHELL_JSON1 -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_EXPLAIN_COMMENTS
!ENDIF

# <<mark>>
# Extra compiler options for various test tools.
#
MPTESTER_COMPILE_OPTS = -DSQLITE_SHELL_JSON1 -DSQLITE_ENABLE_FTS5
FUZZERSHELL_COMPILE_OPTS = -DSQLITE_ENABLE_JSON1
................................................................................
$(SQLITE3DLL):	$(LIBOBJ) $(LIBRESOBJS) $(CORE_LINK_DEP)
	$(LD) $(LDFLAGS) $(LTLINKOPTS) $(LTLIBPATHS) /DLL $(CORE_LINK_OPTS) /OUT:$@ $(LIBOBJ) $(LIBRESOBJS) $(LTLIBS) $(TLIBS)

# <<block2>>
sqlite3.def:	libsqlite3.lib
	echo EXPORTS > sqlite3.def
	dumpbin /all libsqlite3.lib \
		| $(TCLSH_CMD) $(TOP)\tool\replace.tcl include "^\s+1 _?(sqlite3(?:session|changeset)?_[^@]*)(?:@\d+)?$$" \1 \
		| sort >> sqlite3.def
# <</block2>>

$(SQLITE3EXE):	$(TOP)\src\shell.c $(SHELL_CORE_DEP) $(LIBRESOBJS) $(SHELL_CORE_SRC) $(SQLITE3H)
	$(LTLINK) $(SHELL_COMPILE_OPTS) $(READLINE_FLAGS) $(TOP)\src\shell.c $(SHELL_CORE_SRC) \
		/link $(SQLITE3EXEPDB) $(LDFLAGS) $(LTLINKOPTS) $(SHELL_LINK_OPTS) $(LTLIBPATHS) $(LIBRESOBJS) $(LIBREADLINE) $(LTLIBS) $(TLIBS)

................................................................................
# hidden when the library is built via the amalgamation).
#
TESTFIXTURE_FLAGS = -DTCLSH=1 -DSQLITE_TEST=1 -DSQLITE_CRASH_TEST=1
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_SERVER=1 -DSQLITE_PRIVATE=""
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_CORE $(NO_WARN)
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_SERIES_CONSTRAINT_VERIFY=1
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_DEFAULT_PAGE_SIZE=1024

TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) $(TEST_CCONV_OPTS)

TESTFIXTURE_SRC0 = $(TESTEXT) $(TESTSRC2)
TESTFIXTURE_SRC1 = $(TESTEXT) $(SQLITE3C)
!IF $(USE_AMALGAMATION)==0
TESTFIXTURE_SRC = $(TESTSRC) $(TOP)\src\tclsqlite.c $(TESTFIXTURE_SRC0)
!ELSE
................................................................................
dbselftest.exe:	$(TOP)\test\dbselftest.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(DBSELFTEST_COMPILE_OPTS) $(TOP)\test\dbselftest.c $(SQLITE3C)

rbu.exe:	$(TOP)\ext\rbu\rbu.c $(TOP)\ext\rbu\sqlite3rbu.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) -DSQLITE_ENABLE_RBU \
		$(TOP)\ext\rbu\rbu.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)




moreclean:	clean
	del /Q $(SQLITE3C) $(SQLITE3H) 2>NUL
# <</mark>>

clean:
	del /Q *.exp *.lo *.ilk *.lib *.obj *.ncb *.pdb *.sdf *.suo 2>NUL
	del /Q *.bsc *.def *.cod *.da *.bb *.bbg *.vc gmon.out 2>NUL







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  $(TOP)\ext\fts3\fts3_unicode.c \
  $(TOP)\ext\fts3\fts3_unicode2.c \
  $(TOP)\ext\fts3\fts3_write.c \
  $(TOP)\ext\icu\icu.c \
  $(TOP)\ext\rtree\rtree.c \
  $(TOP)\ext\session\sqlite3session.c \
  $(TOP)\ext\rbu\sqlite3rbu.c \
  $(TOP)\ext\misc\json1.c \
  $(TOP)\ext\misc\stmt.c

# Extension header files, part 1.
#
SRC08 = \
  $(TOP)\ext\fts1\fts1.h \
  $(TOP)\ext\fts1\fts1_hash.h \
  $(TOP)\ext\fts1\fts1_tokenizer.h \
................................................................................
  $(TOP)\test\fuzzdata5.db
# <</mark>>

# Additional compiler options for the shell.  These are only effective
# when the shell is not being dynamically linked.
#
!IF $(DYNAMIC_SHELL)==0 && $(FOR_WIN10)==0
SHELL_COMPILE_OPTS = $(SHELL_COMPILE_OPTS) -DSQLITE_SHELL_JSON1 -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_EXPLAIN_COMMENTS -DSQLITE_ENABLE_STMTVTAB
!ENDIF

# <<mark>>
# Extra compiler options for various test tools.
#
MPTESTER_COMPILE_OPTS = -DSQLITE_SHELL_JSON1 -DSQLITE_ENABLE_FTS5
FUZZERSHELL_COMPILE_OPTS = -DSQLITE_ENABLE_JSON1
................................................................................
$(SQLITE3DLL):	$(LIBOBJ) $(LIBRESOBJS) $(CORE_LINK_DEP)
	$(LD) $(LDFLAGS) $(LTLINKOPTS) $(LTLIBPATHS) /DLL $(CORE_LINK_OPTS) /OUT:$@ $(LIBOBJ) $(LIBRESOBJS) $(LTLIBS) $(TLIBS)

# <<block2>>
sqlite3.def:	libsqlite3.lib
	echo EXPORTS > sqlite3.def
	dumpbin /all libsqlite3.lib \
		| $(TCLSH_CMD) $(TOP)\tool\replace.tcl include "^\s+1 _?(sqlite3(?:session|changeset|changegroup)?_[^@]*)(?:@\d+)?$$" \1 \
		| sort >> sqlite3.def
# <</block2>>

$(SQLITE3EXE):	$(TOP)\src\shell.c $(SHELL_CORE_DEP) $(LIBRESOBJS) $(SHELL_CORE_SRC) $(SQLITE3H)
	$(LTLINK) $(SHELL_COMPILE_OPTS) $(READLINE_FLAGS) $(TOP)\src\shell.c $(SHELL_CORE_SRC) \
		/link $(SQLITE3EXEPDB) $(LDFLAGS) $(LTLINKOPTS) $(SHELL_LINK_OPTS) $(LTLIBPATHS) $(LIBRESOBJS) $(LIBREADLINE) $(LTLIBS) $(TLIBS)

................................................................................
# hidden when the library is built via the amalgamation).
#
TESTFIXTURE_FLAGS = -DTCLSH=1 -DSQLITE_TEST=1 -DSQLITE_CRASH_TEST=1
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_SERVER=1 -DSQLITE_PRIVATE=""
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_CORE $(NO_WARN)
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_SERIES_CONSTRAINT_VERIFY=1
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_DEFAULT_PAGE_SIZE=1024
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) -DSQLITE_ENABLE_STMTVTAB
TESTFIXTURE_FLAGS = $(TESTFIXTURE_FLAGS) $(TEST_CCONV_OPTS)

TESTFIXTURE_SRC0 = $(TESTEXT) $(TESTSRC2)
TESTFIXTURE_SRC1 = $(TESTEXT) $(SQLITE3C)
!IF $(USE_AMALGAMATION)==0
TESTFIXTURE_SRC = $(TESTSRC) $(TOP)\src\tclsqlite.c $(TESTFIXTURE_SRC0)
!ELSE
................................................................................
dbselftest.exe:	$(TOP)\test\dbselftest.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) $(DBSELFTEST_COMPILE_OPTS) $(TOP)\test\dbselftest.c $(SQLITE3C)

rbu.exe:	$(TOP)\ext\rbu\rbu.c $(TOP)\ext\rbu\sqlite3rbu.c $(SQLITE3C) $(SQLITE3H)
	$(LTLINK) $(NO_WARN) -DSQLITE_ENABLE_RBU \
		$(TOP)\ext\rbu\rbu.c $(SQLITE3C) /link $(LDFLAGS) $(LTLINKOPTS)

LSMDIR=$(TOP)\ext\lsm1
!INCLUDE $(LSMDIR)\Makefile.msc

moreclean:	clean
	del /Q $(SQLITE3C) $(SQLITE3H) 2>NUL
# <</mark>>

clean:
	del /Q *.exp *.lo *.ilk *.lib *.obj *.ncb *.pdb *.sdf *.suo 2>NUL
	del /Q *.bsc *.def *.cod *.da *.bb *.bbg *.vc gmon.out 2>NUL

Changes to VERSION.

1
3.19.0
|
1
3.20.0

Changes to autoconf/Makefile.msc.

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#
TOP = .


# Set this non-0 to enable full warnings (-W4, etc) when compiling.
#
!IFNDEF USE_FULLWARN
USE_FULLWARN = 0
!ENDIF

# Set this non-0 to enable treating warnings as errors (-WX, etc) when
# compiling.
#
!IFNDEF USE_FATAL_WARN
USE_FATAL_WARN = 0
................................................................................

Replace.exe:
	$(CSC) /target:exe $(TOP)\Replace.cs

sqlite3.def:	Replace.exe $(LIBOBJ)
	echo EXPORTS > sqlite3.def
	dumpbin /all $(LIBOBJ) \
		| .\Replace.exe "^\s+/EXPORT:_?(sqlite3(?:session|changeset)?_[^@,]*)(?:@\d+|,DATA)?$$" $$1 true \
		| sort >> sqlite3.def

$(SQLITE3EXE):	$(TOP)\shell.c $(SHELL_CORE_DEP) $(LIBRESOBJS) $(SHELL_CORE_SRC) $(SQLITE3H)
	$(LTLINK) $(SHELL_COMPILE_OPTS) $(READLINE_FLAGS) $(TOP)\shell.c $(SHELL_CORE_SRC) \
		/link $(SQLITE3EXEPDB) $(LDFLAGS) $(LTLINKOPTS) $(SHELL_LINK_OPTS) $(LTLIBPATHS) $(LIBRESOBJS) $(LIBREADLINE) $(LTLIBS) $(TLIBS)









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#
TOP = .


# Set this non-0 to enable full warnings (-W4, etc) when compiling.
#
!IFNDEF USE_FULLWARN
USE_FULLWARN = 1
!ENDIF

# Set this non-0 to enable treating warnings as errors (-WX, etc) when
# compiling.
#
!IFNDEF USE_FATAL_WARN
USE_FATAL_WARN = 0
................................................................................

Replace.exe:
	$(CSC) /target:exe $(TOP)\Replace.cs

sqlite3.def:	Replace.exe $(LIBOBJ)
	echo EXPORTS > sqlite3.def
	dumpbin /all $(LIBOBJ) \
		| .\Replace.exe "^\s+/EXPORT:_?(sqlite3(?:session|changeset|changegroup)?_[^@,]*)(?:@\d+|,DATA)?$$" $$1 true \
		| sort >> sqlite3.def

$(SQLITE3EXE):	$(TOP)\shell.c $(SHELL_CORE_DEP) $(LIBRESOBJS) $(SHELL_CORE_SRC) $(SQLITE3H)
	$(LTLINK) $(SHELL_COMPILE_OPTS) $(READLINE_FLAGS) $(TOP)\shell.c $(SHELL_CORE_SRC) \
		/link $(SQLITE3EXEPDB) $(LDFLAGS) $(LTLINKOPTS) $(SHELL_LINK_OPTS) $(LTLIBPATHS) $(LIBRESOBJS) $(LIBREADLINE) $(LTLIBS) $(TLIBS)


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#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69 for sqlite 3.19.0.
#
#
# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
#
#
# This configure script is free software; the Free Software Foundation
# gives unlimited permission to copy, distribute and modify it.
................................................................................
subdirs=
MFLAGS=
MAKEFLAGS=

# Identity of this package.
PACKAGE_NAME='sqlite'
PACKAGE_TARNAME='sqlite'
PACKAGE_VERSION='3.19.0'
PACKAGE_STRING='sqlite 3.19.0'
PACKAGE_BUGREPORT=''
PACKAGE_URL=''

# Factoring default headers for most tests.
ac_includes_default="\
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
................................................................................
#
# Report the --help message.
#
if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
\`configure' configures sqlite 3.19.0 to adapt to many kinds of systems.

Usage: $0 [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.
................................................................................
  --build=BUILD     configure for building on BUILD [guessed]
  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
_ACEOF
fi

if test -n "$ac_init_help"; then
  case $ac_init_help in
     short | recursive ) echo "Configuration of sqlite 3.19.0:";;
   esac
  cat <<\_ACEOF

Optional Features:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
................................................................................
    cd "$ac_pwd" || { ac_status=$?; break; }
  done
fi

test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
  cat <<\_ACEOF
sqlite configure 3.19.0
generated by GNU Autoconf 2.69

Copyright (C) 2012 Free Software Foundation, Inc.
This configure script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it.
_ACEOF
  exit
................................................................................
  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

} # ac_fn_c_check_header_mongrel
cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by sqlite $as_me 3.19.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ $0 $@

_ACEOF
exec 5>>config.log
{
................................................................................
else
  enable_memsys5=no
fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support MEMSYS5" >&5
$as_echo_n "checking whether to support MEMSYS5... " >&6; }
if test "${enable_memsys5}" = "yes"; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_MEMSYS5"
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
else
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
# Check whether --enable-memsys3 was given.
................................................................................
else
  enable_memsys3=no
fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support MEMSYS3" >&5
$as_echo_n "checking whether to support MEMSYS3... " >&6; }
if test "${enable_memsys3}" = "yes" -a "${enable_memsys5}" = "no"; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_MEMSYS3"
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
else
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi

................................................................................
if test "${enable_fts3+set}" = set; then :
  enableval=$enable_fts3; enable_fts3=yes
else
  enable_fts3=no
fi

if test "${enable_fts3}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_FTS3"
fi
# Check whether --enable-fts4 was given.
if test "${enable_fts4+set}" = set; then :
  enableval=$enable_fts4; enable_fts4=yes
else
  enable_fts4=no
fi

if test "${enable_fts4}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_FTS4"
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing log" >&5
$as_echo_n "checking for library containing log... " >&6; }
if ${ac_cv_search_log+:} false; then :
  $as_echo_n "(cached) " >&6
else
  ac_func_search_save_LIBS=$LIBS
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
................................................................................
if test "${enable_fts5+set}" = set; then :
  enableval=$enable_fts5; enable_fts5=yes
else
  enable_fts5=no
fi

if test "${enable_fts5}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_FTS5"
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing log" >&5
$as_echo_n "checking for library containing log... " >&6; }
if ${ac_cv_search_log+:} false; then :
  $as_echo_n "(cached) " >&6
else
  ac_func_search_save_LIBS=$LIBS
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
................................................................................
if test "${enable_json1+set}" = set; then :
  enableval=$enable_json1; enable_json1=yes
else
  enable_json1=no
fi

if test "${enable_json1}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_JSON1"
fi

#########
# See whether we should enable RTREE
# Check whether --enable-rtree was given.
if test "${enable_rtree+set}" = set; then :
  enableval=$enable_rtree; enable_rtree=yes
else
  enable_rtree=no
fi

if test "${enable_rtree}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_RTREE"
fi

#########
# See whether we should enable the SESSION extension
# Check whether --enable-session was given.
if test "${enable_session+set}" = set; then :
  enableval=$enable_session; enable_session=yes
else
  enable_session=no
fi

if test "${enable_session}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_SESSION"
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_PREUPDATE_HOOK"
fi

#########
# attempt to duplicate any OMITS and ENABLES into the $(OPT_FEATURE_FLAGS) parameter
for option in $CFLAGS $CPPFLAGS
do
  case $option in
    -DSQLITE_OMIT*) OPT_FEATURE_FLAGS="$OPT_FEATURE_FLAGS $option";;
    -DSQLITE_ENABLE*) OPT_FEATURE_FLAGS="$OPT_FEATURE_FLAGS $option";;
  esac
done
................................................................................
test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1

cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
# Save the log message, to keep $0 and so on meaningful, and to
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
This file was extended by sqlite $as_me 3.19.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  CONFIG_FILES    = $CONFIG_FILES
  CONFIG_HEADERS  = $CONFIG_HEADERS
  CONFIG_LINKS    = $CONFIG_LINKS
  CONFIG_COMMANDS = $CONFIG_COMMANDS
  $ $0 $@
................................................................................

Report bugs to the package provider."

_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
sqlite config.status 3.19.0
configured by $0, generated by GNU Autoconf 2.69,
  with options \\"\$ac_cs_config\\"

Copyright (C) 2012 Free Software Foundation, Inc.
This config.status script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."



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#! /bin/sh
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.69 for sqlite 3.20.0.
#
#
# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
#
#
# This configure script is free software; the Free Software Foundation
# gives unlimited permission to copy, distribute and modify it.
................................................................................
subdirs=
MFLAGS=
MAKEFLAGS=

# Identity of this package.
PACKAGE_NAME='sqlite'
PACKAGE_TARNAME='sqlite'
PACKAGE_VERSION='3.20.0'
PACKAGE_STRING='sqlite 3.20.0'
PACKAGE_BUGREPORT=''
PACKAGE_URL=''

# Factoring default headers for most tests.
ac_includes_default="\
#include <stdio.h>
#ifdef HAVE_SYS_TYPES_H
................................................................................
#
# Report the --help message.
#
if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
\`configure' configures sqlite 3.20.0 to adapt to many kinds of systems.

Usage: $0 [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.
................................................................................
  --build=BUILD     configure for building on BUILD [guessed]
  --host=HOST       cross-compile to build programs to run on HOST [BUILD]
_ACEOF
fi

if test -n "$ac_init_help"; then
  case $ac_init_help in
     short | recursive ) echo "Configuration of sqlite 3.20.0:";;
   esac
  cat <<\_ACEOF

Optional Features:
  --disable-option-checking  ignore unrecognized --enable/--with options
  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
................................................................................
    cd "$ac_pwd" || { ac_status=$?; break; }
  done
fi

test -n "$ac_init_help" && exit $ac_status
if $ac_init_version; then
  cat <<\_ACEOF
sqlite configure 3.20.0
generated by GNU Autoconf 2.69

Copyright (C) 2012 Free Software Foundation, Inc.
This configure script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it.
_ACEOF
  exit
................................................................................
  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

} # ac_fn_c_check_header_mongrel
cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by sqlite $as_me 3.20.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ $0 $@

_ACEOF
exec 5>>config.log
{
................................................................................
else
  enable_memsys5=no
fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support MEMSYS5" >&5
$as_echo_n "checking whether to support MEMSYS5... " >&6; }
if test "${enable_memsys5}" = "yes"; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_MEMSYS5"
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
else
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
# Check whether --enable-memsys3 was given.
................................................................................
else
  enable_memsys3=no
fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support MEMSYS3" >&5
$as_echo_n "checking whether to support MEMSYS3... " >&6; }
if test "${enable_memsys3}" = "yes" -a "${enable_memsys5}" = "no"; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_MEMSYS3"
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
else
  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi

................................................................................
if test "${enable_fts3+set}" = set; then :
  enableval=$enable_fts3; enable_fts3=yes
else
  enable_fts3=no
fi

if test "${enable_fts3}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS3"
fi
# Check whether --enable-fts4 was given.
if test "${enable_fts4+set}" = set; then :
  enableval=$enable_fts4; enable_fts4=yes
else
  enable_fts4=no
fi

if test "${enable_fts4}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS4"
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing log" >&5
$as_echo_n "checking for library containing log... " >&6; }
if ${ac_cv_search_log+:} false; then :
  $as_echo_n "(cached) " >&6
else
  ac_func_search_save_LIBS=$LIBS
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
................................................................................
if test "${enable_fts5+set}" = set; then :
  enableval=$enable_fts5; enable_fts5=yes
else
  enable_fts5=no
fi

if test "${enable_fts5}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS5"
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing log" >&5
$as_echo_n "checking for library containing log... " >&6; }
if ${ac_cv_search_log+:} false; then :
  $as_echo_n "(cached) " >&6
else
  ac_func_search_save_LIBS=$LIBS
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
................................................................................
if test "${enable_json1+set}" = set; then :
  enableval=$enable_json1; enable_json1=yes
else
  enable_json1=no
fi

if test "${enable_json1}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_JSON1"
fi

#########
# See whether we should enable RTREE
# Check whether --enable-rtree was given.
if test "${enable_rtree+set}" = set; then :
  enableval=$enable_rtree; enable_rtree=yes
else
  enable_rtree=no
fi

if test "${enable_rtree}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_RTREE"
fi

#########
# See whether we should enable the SESSION extension
# Check whether --enable-session was given.
if test "${enable_session+set}" = set; then :
  enableval=$enable_session; enable_session=yes
else
  enable_session=no
fi

if test "${enable_session}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_SESSION"
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_PREUPDATE_HOOK"
fi

#########
# attempt to duplicate any OMITS and ENABLES into the ${OPT_FEATURE_FLAGS} parameter
for option in $CFLAGS $CPPFLAGS
do
  case $option in
    -DSQLITE_OMIT*) OPT_FEATURE_FLAGS="$OPT_FEATURE_FLAGS $option";;
    -DSQLITE_ENABLE*) OPT_FEATURE_FLAGS="$OPT_FEATURE_FLAGS $option";;
  esac
done
................................................................................
test $as_write_fail = 0 && chmod +x $CONFIG_STATUS || ac_write_fail=1

cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
# Save the log message, to keep $0 and so on meaningful, and to
# report actual input values of CONFIG_FILES etc. instead of their
# values after options handling.
ac_log="
This file was extended by sqlite $as_me 3.20.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  CONFIG_FILES    = $CONFIG_FILES
  CONFIG_HEADERS  = $CONFIG_HEADERS
  CONFIG_LINKS    = $CONFIG_LINKS
  CONFIG_COMMANDS = $CONFIG_COMMANDS
  $ $0 $@
................................................................................

Report bugs to the package provider."

_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
ac_cs_version="\\
sqlite config.status 3.20.0
configured by $0, generated by GNU Autoconf 2.69,
  with options \\"\$ac_cs_config\\"

Copyright (C) 2012 Free Software Foundation, Inc.
This config.status script is free software; the Free Software Foundation
gives unlimited permission to copy, distribute and modify it."

Changes to configure.ac.

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# Do we want to support memsys3 and/or memsys5
#
AC_ARG_ENABLE(memsys5, 
  AC_HELP_STRING([--enable-memsys5],[Enable MEMSYS5]),
  [enable_memsys5=yes],[enable_memsys5=no])
AC_MSG_CHECKING([whether to support MEMSYS5])
if test "${enable_memsys5}" = "yes"; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_MEMSYS5"
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi
AC_ARG_ENABLE(memsys3, 
  AC_HELP_STRING([--enable-memsys3],[Enable MEMSYS3]),
  [enable_memsys3=yes],[enable_memsys3=no])
AC_MSG_CHECKING([whether to support MEMSYS3])
if test "${enable_memsys3}" = "yes" -a "${enable_memsys5}" = "no"; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_MEMSYS3"
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi

#########
# See whether we should enable Full Text Search extensions
AC_ARG_ENABLE(fts3, AC_HELP_STRING([--enable-fts3],
      [Enable the FTS3 extension]),
      [enable_fts3=yes],[enable_fts3=no])
if test "${enable_fts3}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_FTS3"
fi
AC_ARG_ENABLE(fts4, AC_HELP_STRING([--enable-fts4],
      [Enable the FTS4 extension]),
      [enable_fts4=yes],[enable_fts4=no])
if test "${enable_fts4}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_FTS4"
  AC_SEARCH_LIBS([log],[m])
fi
AC_ARG_ENABLE(fts5, AC_HELP_STRING([--enable-fts5],
      [Enable the FTS5 extension]),
      [enable_fts5=yes],[enable_fts5=no])
if test "${enable_fts5}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_FTS5"
  AC_SEARCH_LIBS([log],[m])
fi

#########
# See whether we should enable JSON1
AC_ARG_ENABLE(json1, AC_HELP_STRING([--enable-json1],
      [Enable the JSON1 extension]),
      [enable_json1=yes],[enable_json1=no])
if test "${enable_json1}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_JSON1"
fi

#########
# See whether we should enable RTREE
AC_ARG_ENABLE(rtree, AC_HELP_STRING([--enable-rtree],
      [Enable the RTREE extension]),
      [enable_rtree=yes],[enable_rtree=no])
if test "${enable_rtree}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_RTREE"
fi

#########
# See whether we should enable the SESSION extension
AC_ARG_ENABLE(session, AC_HELP_STRING([--enable-session],
      [Enable the SESSION extension]),
      [enable_session=yes],[enable_session=no])
if test "${enable_session}" = "yes" ; then
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_SESSION"
  OPT_FEATURE_FLAGS="$(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_PREUPDATE_HOOK"
fi

#########
# attempt to duplicate any OMITS and ENABLES into the $(OPT_FEATURE_FLAGS) parameter
for option in $CFLAGS $CPPFLAGS
do
  case $option in
    -DSQLITE_OMIT*) OPT_FEATURE_FLAGS="$OPT_FEATURE_FLAGS $option";;
    -DSQLITE_ENABLE*) OPT_FEATURE_FLAGS="$OPT_FEATURE_FLAGS $option";;
  esac
done







|









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|





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# Do we want to support memsys3 and/or memsys5
#
AC_ARG_ENABLE(memsys5, 
  AC_HELP_STRING([--enable-memsys5],[Enable MEMSYS5]),
  [enable_memsys5=yes],[enable_memsys5=no])
AC_MSG_CHECKING([whether to support MEMSYS5])
if test "${enable_memsys5}" = "yes"; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_MEMSYS5"
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi
AC_ARG_ENABLE(memsys3, 
  AC_HELP_STRING([--enable-memsys3],[Enable MEMSYS3]),
  [enable_memsys3=yes],[enable_memsys3=no])
AC_MSG_CHECKING([whether to support MEMSYS3])
if test "${enable_memsys3}" = "yes" -a "${enable_memsys5}" = "no"; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_MEMSYS3"
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
fi

#########
# See whether we should enable Full Text Search extensions
AC_ARG_ENABLE(fts3, AC_HELP_STRING([--enable-fts3],
      [Enable the FTS3 extension]),
      [enable_fts3=yes],[enable_fts3=no])
if test "${enable_fts3}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS3"
fi
AC_ARG_ENABLE(fts4, AC_HELP_STRING([--enable-fts4],
      [Enable the FTS4 extension]),
      [enable_fts4=yes],[enable_fts4=no])
if test "${enable_fts4}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS4"
  AC_SEARCH_LIBS([log],[m])
fi
AC_ARG_ENABLE(fts5, AC_HELP_STRING([--enable-fts5],
      [Enable the FTS5 extension]),
      [enable_fts5=yes],[enable_fts5=no])
if test "${enable_fts5}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_FTS5"
  AC_SEARCH_LIBS([log],[m])
fi

#########
# See whether we should enable JSON1
AC_ARG_ENABLE(json1, AC_HELP_STRING([--enable-json1],
      [Enable the JSON1 extension]),
      [enable_json1=yes],[enable_json1=no])
if test "${enable_json1}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_JSON1"
fi

#########
# See whether we should enable RTREE
AC_ARG_ENABLE(rtree, AC_HELP_STRING([--enable-rtree],
      [Enable the RTREE extension]),
      [enable_rtree=yes],[enable_rtree=no])
if test "${enable_rtree}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_RTREE"
fi

#########
# See whether we should enable the SESSION extension
AC_ARG_ENABLE(session, AC_HELP_STRING([--enable-session],
      [Enable the SESSION extension]),
      [enable_session=yes],[enable_session=no])
if test "${enable_session}" = "yes" ; then
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_SESSION"
  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_PREUPDATE_HOOK"
fi

#########
# attempt to duplicate any OMITS and ENABLES into the ${OPT_FEATURE_FLAGS} parameter
for option in $CFLAGS $CPPFLAGS
do
  case $option in
    -DSQLITE_OMIT*) OPT_FEATURE_FLAGS="$OPT_FEATURE_FLAGS $option";;
    -DSQLITE_ENABLE*) OPT_FEATURE_FLAGS="$OPT_FEATURE_FLAGS $option";;
  esac
done

Changes to doc/lemon.html.

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Lemon also implements features that can be used
to eliminate resource leaks, making is suitable for use
in long-running programs such as graphical user interfaces
or embedded controllers.</p>

<p>This document is an introduction to the Lemon
parser generator.</p>





















<h2>Theory of Operation</h2>

<p>The main goal of Lemon is to translate a context free grammar (CFG)
for a particular language into C code that implements a parser for
that language.
The program has two inputs:







>
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Lemon also implements features that can be used
to eliminate resource leaks, making is suitable for use
in long-running programs such as graphical user interfaces
or embedded controllers.</p>

<p>This document is an introduction to the Lemon
parser generator.</p>

<h2>Security Note</h2>

<p>The language parser code created by Lemon is very robust and
is well-suited for use in internet-facing applications that need to
safely process maliciously crafted inputs.

<p>The "lemon.exe" command-line tool itself works great when given a valid
input grammar file and almost always gives helpful
error messages for malformed inputs.  However,  it is possible for
a malicious user to craft a grammar file that will cause 
lemon.exe to crash.
We do not see this as a problem, as lemon.exe is not intended to be used
with hostile inputs.
To summarize:</p>

<ul>
<li>Parser code generated by lemon &rarr; Robust and secure
<li>The "lemon.exe" command line tool itself &rarr; Not so much
</ul>

<h2>Theory of Operation</h2>

<p>The main goal of Lemon is to translate a context free grammar (CFG)
for a particular language into C code that implements a parser for
that language.
The program has two inputs:

Changes to ext/fts3/fts3.c.

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      sqlite3_reset(pCsr->pStmt);
      pCsr->pStmt = 0;
    }
    pCsr->bSeekStmt = 0;
  }
  sqlite3_finalize(pCsr->pStmt);
}














/*
** Close the cursor.  For additional information see the documentation
** on the xClose method of the virtual table interface.
*/
static int fts3CloseMethod(sqlite3_vtab_cursor *pCursor){
  Fts3Cursor *pCsr = (Fts3Cursor *)pCursor;
  assert( ((Fts3Table *)pCsr->base.pVtab)->pSegments==0 );
  fts3CursorFinalizeStmt(pCsr);
  sqlite3Fts3ExprFree(pCsr->pExpr);
  sqlite3Fts3FreeDeferredTokens(pCsr);
  sqlite3_free(pCsr->aDoclist);
  sqlite3Fts3MIBufferFree(pCsr->pMIBuffer);
  assert( ((Fts3Table *)pCsr->base.pVtab)->pSegments==0 );
  sqlite3_free(pCsr);
  return SQLITE_OK;
}

/*
** If pCsr->pStmt has not been prepared (i.e. if pCsr->pStmt==0), then
................................................................................
    char *zSql;
    if( p->pSeekStmt ){
      pCsr->pStmt = p->pSeekStmt;
      p->pSeekStmt = 0;
    }else{
      zSql = sqlite3_mprintf("SELECT %s WHERE rowid = ?", p->zReadExprlist);
      if( !zSql ) return SQLITE_NOMEM;
      rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0);
      sqlite3_free(zSql);
    }
    if( rc==SQLITE_OK ) pCsr->bSeekStmt = 1;
  }
  return rc;
}

................................................................................
  if( eSearch!=FTS3_FULLSCAN_SEARCH ) pCons = apVal[iIdx++];
  if( idxNum & FTS3_HAVE_LANGID ) pLangid = apVal[iIdx++];
  if( idxNum & FTS3_HAVE_DOCID_GE ) pDocidGe = apVal[iIdx++];
  if( idxNum & FTS3_HAVE_DOCID_LE ) pDocidLe = apVal[iIdx++];
  assert( iIdx==nVal );

  /* In case the cursor has been used before, clear it now. */
  fts3CursorFinalizeStmt(pCsr);
  sqlite3_free(pCsr->aDoclist);
  sqlite3Fts3MIBufferFree(pCsr->pMIBuffer);
  sqlite3Fts3ExprFree(pCsr->pExpr);
  memset(&pCursor[1], 0, sizeof(Fts3Cursor)-sizeof(sqlite3_vtab_cursor));

  /* Set the lower and upper bounds on docids to return */
  pCsr->iMinDocid = fts3DocidRange(pDocidGe, SMALLEST_INT64);
  pCsr->iMaxDocid = fts3DocidRange(pDocidLe, LARGEST_INT64);

  if( idxStr ){
    pCsr->bDesc = (idxStr[0]=='D');
................................................................................
      );
    }else{
      zSql = sqlite3_mprintf("SELECT %s ORDER BY rowid %s", 
          p->zReadExprlist, (pCsr->bDesc ? "DESC" : "ASC")
      );
    }
    if( zSql ){
      rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0);
      sqlite3_free(zSql);
    }else{
      rc = SQLITE_NOMEM;
    }
  }else if( eSearch==FTS3_DOCID_SEARCH ){
    rc = fts3CursorSeekStmt(pCsr);
    if( rc==SQLITE_OK ){
................................................................................
}

/* 
** This is the xEof method of the virtual table. SQLite calls this 
** routine to find out if it has reached the end of a result set.
*/
static int fts3EofMethod(sqlite3_vtab_cursor *pCursor){
  return ((Fts3Cursor *)pCursor)->isEof;





}

/* 
** This is the xRowid method. The SQLite core calls this routine to
** retrieve the rowid for the current row of the result set. fts3
** exposes %_content.docid as the rowid for the virtual table. The
** rowid should be written to *pRowid.







>
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<







 







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>







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1729
1730




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....
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....
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....
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....
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      sqlite3_reset(pCsr->pStmt);
      pCsr->pStmt = 0;
    }
    pCsr->bSeekStmt = 0;
  }
  sqlite3_finalize(pCsr->pStmt);
}

/*
** Free all resources currently held by the cursor passed as the only
** argument.
*/
static void fts3ClearCursor(Fts3Cursor *pCsr){
  fts3CursorFinalizeStmt(pCsr);
  sqlite3Fts3FreeDeferredTokens(pCsr);
  sqlite3_free(pCsr->aDoclist);
  sqlite3Fts3MIBufferFree(pCsr->pMIBuffer);
  sqlite3Fts3ExprFree(pCsr->pExpr);
  memset(&(&pCsr->base)[1], 0, sizeof(Fts3Cursor)-sizeof(sqlite3_vtab_cursor));
}

/*
** Close the cursor.  For additional information see the documentation
** on the xClose method of the virtual table interface.
*/
static int fts3CloseMethod(sqlite3_vtab_cursor *pCursor){
  Fts3Cursor *pCsr = (Fts3Cursor *)pCursor;
  assert( ((Fts3Table *)pCsr->base.pVtab)->pSegments==0 );
  fts3ClearCursor(pCsr);




  assert( ((Fts3Table *)pCsr->base.pVtab)->pSegments==0 );
  sqlite3_free(pCsr);
  return SQLITE_OK;
}

/*
** If pCsr->pStmt has not been prepared (i.e. if pCsr->pStmt==0), then
................................................................................
    char *zSql;
    if( p->pSeekStmt ){
      pCsr->pStmt = p->pSeekStmt;
      p->pSeekStmt = 0;
    }else{
      zSql = sqlite3_mprintf("SELECT %s WHERE rowid = ?", p->zReadExprlist);
      if( !zSql ) return SQLITE_NOMEM;
      rc = sqlite3_prepare_v3(p->db, zSql,-1,SQLITE_PREPARE_PERSISTENT,&pCsr->pStmt,0);
      sqlite3_free(zSql);
    }
    if( rc==SQLITE_OK ) pCsr->bSeekStmt = 1;
  }
  return rc;
}

................................................................................
  if( eSearch!=FTS3_FULLSCAN_SEARCH ) pCons = apVal[iIdx++];
  if( idxNum & FTS3_HAVE_LANGID ) pLangid = apVal[iIdx++];
  if( idxNum & FTS3_HAVE_DOCID_GE ) pDocidGe = apVal[iIdx++];
  if( idxNum & FTS3_HAVE_DOCID_LE ) pDocidLe = apVal[iIdx++];
  assert( iIdx==nVal );

  /* In case the cursor has been used before, clear it now. */
  fts3ClearCursor(pCsr);





  /* Set the lower and upper bounds on docids to return */
  pCsr->iMinDocid = fts3DocidRange(pDocidGe, SMALLEST_INT64);
  pCsr->iMaxDocid = fts3DocidRange(pDocidLe, LARGEST_INT64);

  if( idxStr ){
    pCsr->bDesc = (idxStr[0]=='D');
................................................................................
      );
    }else{
      zSql = sqlite3_mprintf("SELECT %s ORDER BY rowid %s", 
          p->zReadExprlist, (pCsr->bDesc ? "DESC" : "ASC")
      );
    }
    if( zSql ){
      rc = sqlite3_prepare_v3(p->db,zSql,-1,SQLITE_PREPARE_PERSISTENT,&pCsr->pStmt,0);
      sqlite3_free(zSql);
    }else{
      rc = SQLITE_NOMEM;
    }
  }else if( eSearch==FTS3_DOCID_SEARCH ){
    rc = fts3CursorSeekStmt(pCsr);
    if( rc==SQLITE_OK ){
................................................................................
}

/* 
** This is the xEof method of the virtual table. SQLite calls this 
** routine to find out if it has reached the end of a result set.
*/
static int fts3EofMethod(sqlite3_vtab_cursor *pCursor){
  Fts3Cursor *pCsr = (Fts3Cursor*)pCursor;
  if( pCsr->isEof ){
    fts3ClearCursor(pCsr);
    pCsr->isEof = 1;
  }
  return pCsr->isEof;
}

/* 
** This is the xRowid method. The SQLite core calls this routine to
** retrieve the rowid for the current row of the result set. fts3
** exposes %_content.docid as the rowid for the virtual table. The
** rowid should be written to *pRowid.

Changes to ext/fts3/fts3_write.c.

403
404
405
406
407
408
409

410
411
412
413
414
415
416
417
      zSql = sqlite3_mprintf(azSql[eStmt], p->zReadExprlist);
    }else{
      zSql = sqlite3_mprintf(azSql[eStmt], p->zDb, p->zName);
    }
    if( !zSql ){
      rc = SQLITE_NOMEM;
    }else{

      rc = sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, NULL);
      sqlite3_free(zSql);
      assert( rc==SQLITE_OK || pStmt==0 );
      p->aStmt[eStmt] = pStmt;
    }
  }
  if( apVal ){
    int i;







>
|







403
404
405
406
407
408
409
410
411
412
413
414
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418
      zSql = sqlite3_mprintf(azSql[eStmt], p->zReadExprlist);
    }else{
      zSql = sqlite3_mprintf(azSql[eStmt], p->zDb, p->zName);
    }
    if( !zSql ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v3(p->db, zSql, -1, SQLITE_PREPARE_PERSISTENT,
                              &pStmt, NULL);
      sqlite3_free(zSql);
      assert( rc==SQLITE_OK || pStmt==0 );
      p->aStmt[eStmt] = pStmt;
    }
  }
  if( apVal ){
    int i;

Changes to ext/fts5/fts5_buffer.c.

63
64
65
66
67
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...
242
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254
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void sqlite3Fts5BufferAppendBlob(
  int *pRc,
  Fts5Buffer *pBuf, 
  u32 nData, 
  const u8 *pData
){
  assert_nc( *pRc || nData>=0 );

  if( fts5BufferGrow(pRc, pBuf, nData) ) return;
  memcpy(&pBuf->p[pBuf->n], pData, nData);
  pBuf->n += nData;

}

/*
** Append the nul-terminated string zStr to the buffer pBuf. This function
** ensures that the byte following the buffer data is set to 0x00, even 
** though this byte is not included in the pBuf->n count.
*/
................................................................................
  return SQLITE_OK;
}

void *sqlite3Fts5MallocZero(int *pRc, int nByte){
  void *pRet = 0;
  if( *pRc==SQLITE_OK ){
    pRet = sqlite3_malloc(nByte);
    if( pRet==0 && nByte>0 ){
      *pRc = SQLITE_NOMEM;
    }else{
      memset(pRet, 0, nByte);
    }
  }
  return pRet;
}








>
|
|
|
>







 







|
|







63
64
65
66
67
68
69
70
71
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74
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81
...
244
245
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256
257
258
259
void sqlite3Fts5BufferAppendBlob(
  int *pRc,
  Fts5Buffer *pBuf, 
  u32 nData, 
  const u8 *pData
){
  assert_nc( *pRc || nData>=0 );
  if( nData ){
    if( fts5BufferGrow(pRc, pBuf, nData) ) return;
    memcpy(&pBuf->p[pBuf->n], pData, nData);
    pBuf->n += nData;
  }
}

/*
** Append the nul-terminated string zStr to the buffer pBuf. This function
** ensures that the byte following the buffer data is set to 0x00, even 
** though this byte is not included in the pBuf->n count.
*/
................................................................................
  return SQLITE_OK;
}

void *sqlite3Fts5MallocZero(int *pRc, int nByte){
  void *pRet = 0;
  if( *pRc==SQLITE_OK ){
    pRet = sqlite3_malloc(nByte);
    if( pRet==0 ){
      if( nByte>0 ) *pRc = SQLITE_NOMEM;
    }else{
      memset(pRet, 0, nByte);
    }
  }
  return pRet;
}

Changes to ext/fts5/fts5_hash.c.

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41
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  int nSlot;                      /* Size of aSlot[] array */
  Fts5HashEntry *pScan;           /* Current ordered scan item */
  Fts5HashEntry **aSlot;          /* Array of hash slots */
};

/*
** Each entry in the hash table is represented by an object of the 
** following type. Each object, its key (zKey[]) and its current data
** are stored in a single memory allocation. The position list data 

** immediately follows the key data in memory.
**
** The data that follows the key is in a similar, but not identical format
** to the doclist data stored in the database. It is:
**
**   * Rowid, as a varint
**   * Position list, without 0x00 terminator.
**   * Size of previous position list and rowid, as a 4 byte
................................................................................
struct Fts5HashEntry {
  Fts5HashEntry *pHashNext;       /* Next hash entry with same hash-key */
  Fts5HashEntry *pScanNext;       /* Next entry in sorted order */
  
  int nAlloc;                     /* Total size of allocation */
  int iSzPoslist;                 /* Offset of space for 4-byte poslist size */
  int nData;                      /* Total bytes of data (incl. structure) */
  int nKey;                       /* Length of zKey[] in bytes */
  u8 bDel;                        /* Set delete-flag @ iSzPoslist */
  u8 bContent;                    /* Set content-flag (detail=none mode) */
  i16 iCol;                       /* Column of last value written */
  int iPos;                       /* Position of last value written */
  i64 iRowid;                     /* Rowid of last value written */
  char zKey[8];                   /* Nul-terminated entry key */
};

/*
** Size of Fts5HashEntry without the zKey[] array.


*/
#define FTS5_HASHENTRYSIZE (sizeof(Fts5HashEntry)-8)




/*
** Allocate a new hash table.
*/
int sqlite3Fts5HashNew(Fts5Config *pConfig, Fts5Hash **ppNew, int *pnByte){
  int rc = SQLITE_OK;
................................................................................

  apNew = (Fts5HashEntry**)sqlite3_malloc(nNew*sizeof(Fts5HashEntry*));
  if( !apNew ) return SQLITE_NOMEM;
  memset(apNew, 0, nNew*sizeof(Fts5HashEntry*));

  for(i=0; i<pHash->nSlot; i++){
    while( apOld[i] ){
      int iHash;
      Fts5HashEntry *p = apOld[i];
      apOld[i] = p->pHashNext;
      iHash = fts5HashKey(nNew, (u8*)p->zKey, (int)strlen(p->zKey));

      p->pHashNext = apNew[iHash];
      apNew[iHash] = p;
    }
  }

  sqlite3_free(apOld);
  pHash->nSlot = nNew;
................................................................................
  int bNew;                       /* If non-delete entry should be written */
  
  bNew = (pHash->eDetail==FTS5_DETAIL_FULL);

  /* Attempt to locate an existing hash entry */
  iHash = fts5HashKey2(pHash->nSlot, (u8)bByte, (const u8*)pToken, nToken);
  for(p=pHash->aSlot[iHash]; p; p=p->pHashNext){

    if( p->zKey[0]==bByte 
     && p->nKey==nToken
     && memcmp(&p->zKey[1], pToken, nToken)==0 
    ){
      break;
    }
  }

  /* If an existing hash entry cannot be found, create a new one. */
  if( p==0 ){
    /* Figure out how much space to allocate */

    int nByte = FTS5_HASHENTRYSIZE + (nToken+1) + 1 + 64;
    if( nByte<128 ) nByte = 128;

    /* Grow the Fts5Hash.aSlot[] array if necessary. */
    if( (pHash->nEntry*2)>=pHash->nSlot ){
      int rc = fts5HashResize(pHash);
      if( rc!=SQLITE_OK ) return rc;
      iHash = fts5HashKey2(pHash->nSlot, (u8)bByte, (const u8*)pToken, nToken);
    }

    /* Allocate new Fts5HashEntry and add it to the hash table. */
    p = (Fts5HashEntry*)sqlite3_malloc(nByte);
    if( !p ) return SQLITE_NOMEM;
    memset(p, 0, FTS5_HASHENTRYSIZE);
    p->nAlloc = nByte;

    p->zKey[0] = bByte;
    memcpy(&p->zKey[1], pToken, nToken);
    assert( iHash==fts5HashKey(pHash->nSlot, (u8*)p->zKey, nToken+1) );
    p->nKey = nToken;
    p->zKey[nToken+1] = '\0';
    p->nData = nToken+1 + 1 + FTS5_HASHENTRYSIZE;
    p->pHashNext = pHash->aSlot[iHash];
    pHash->aSlot[iHash] = p;
    pHash->nEntry++;

    /* Add the first rowid field to the hash-entry */
    p->nData += sqlite3Fts5PutVarint(&((u8*)p)[p->nData], iRowid);
    p->iRowid = iRowid;
................................................................................
      *ppOut = p2;
      p2 = 0;
    }else if( p2==0 ){
      *ppOut = p1;
      p1 = 0;
    }else{
      int i = 0;
      while( p1->zKey[i]==p2->zKey[i] ) i++;



      if( ((u8)p1->zKey[i])>((u8)p2->zKey[i]) ){

        /* p2 is smaller */
        *ppOut = p2;
        ppOut = &p2->pScanNext;
        p2 = p2->pScanNext;
      }else{
        /* p1 is smaller */
        *ppOut = p1;
................................................................................
  ap = sqlite3_malloc(sizeof(Fts5HashEntry*) * nMergeSlot);
  if( !ap ) return SQLITE_NOMEM;
  memset(ap, 0, sizeof(Fts5HashEntry*) * nMergeSlot);

  for(iSlot=0; iSlot<pHash->nSlot; iSlot++){
    Fts5HashEntry *pIter;
    for(pIter=pHash->aSlot[iSlot]; pIter; pIter=pIter->pHashNext){
      if( pTerm==0 || 0==memcmp(pIter->zKey, pTerm, nTerm) ){
        Fts5HashEntry *pEntry = pIter;
        pEntry->pScanNext = 0;
        for(i=0; ap[i]; i++){
          pEntry = fts5HashEntryMerge(pEntry, ap[i]);
          ap[i] = 0;
        }
        ap[i] = pEntry;
................................................................................
int sqlite3Fts5HashQuery(
  Fts5Hash *pHash,                /* Hash table to query */
  const char *pTerm, int nTerm,   /* Query term */
  const u8 **ppDoclist,           /* OUT: Pointer to doclist for pTerm */
  int *pnDoclist                  /* OUT: Size of doclist in bytes */
){
  unsigned int iHash = fts5HashKey(pHash->nSlot, (const u8*)pTerm, nTerm);

  Fts5HashEntry *p;

  for(p=pHash->aSlot[iHash]; p; p=p->pHashNext){

    if( memcmp(p->zKey, pTerm, nTerm)==0 && p->zKey[nTerm]==0 ) break;
  }

  if( p ){
    fts5HashAddPoslistSize(pHash, p);
    *ppDoclist = (const u8*)&p->zKey[nTerm+1];
    *pnDoclist = p->nData - (FTS5_HASHENTRYSIZE + nTerm + 1);
  }else{
    *ppDoclist = 0;
    *pnDoclist = 0;
  }

  return SQLITE_OK;
}
................................................................................
  Fts5Hash *pHash,
  const char **pzTerm,            /* OUT: term (nul-terminated) */
  const u8 **ppDoclist,           /* OUT: pointer to doclist */
  int *pnDoclist                  /* OUT: size of doclist in bytes */
){
  Fts5HashEntry *p;
  if( (p = pHash->pScan) ){

    int nTerm = (int)strlen(p->zKey);
    fts5HashAddPoslistSize(pHash, p);
    *pzTerm = p->zKey;
    *ppDoclist = (const u8*)&p->zKey[nTerm+1];
    *pnDoclist = p->nData - (FTS5_HASHENTRYSIZE + nTerm + 1);
  }else{
    *pzTerm = 0;
    *ppDoclist = 0;
    *pnDoclist = 0;
  }
}








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  int nSlot;                      /* Size of aSlot[] array */
  Fts5HashEntry *pScan;           /* Current ordered scan item */
  Fts5HashEntry **aSlot;          /* Array of hash slots */
};

/*
** Each entry in the hash table is represented by an object of the 
** following type. Each object, its key (a nul-terminated string) and 
** its current data are stored in a single memory allocation. The 
** key immediately follows the object in memory. The position list
** data immediately follows the key data in memory.
**
** The data that follows the key is in a similar, but not identical format
** to the doclist data stored in the database. It is:
**
**   * Rowid, as a varint
**   * Position list, without 0x00 terminator.
**   * Size of previous position list and rowid, as a 4 byte
................................................................................
struct Fts5HashEntry {
  Fts5HashEntry *pHashNext;       /* Next hash entry with same hash-key */
  Fts5HashEntry *pScanNext;       /* Next entry in sorted order */
  
  int nAlloc;                     /* Total size of allocation */
  int iSzPoslist;                 /* Offset of space for 4-byte poslist size */
  int nData;                      /* Total bytes of data (incl. structure) */
  int nKey;                       /* Length of key in bytes */
  u8 bDel;                        /* Set delete-flag @ iSzPoslist */
  u8 bContent;                    /* Set content-flag (detail=none mode) */
  i16 iCol;                       /* Column of last value written */
  int iPos;                       /* Position of last value written */
  i64 iRowid;                     /* Rowid of last value written */

};

/*
** Eqivalent to:
**
**   char *fts5EntryKey(Fts5HashEntry *pEntry){ return zKey; }
*/


#define fts5EntryKey(p) ( ((char *)(&(p)[1])) )


/*
** Allocate a new hash table.
*/
int sqlite3Fts5HashNew(Fts5Config *pConfig, Fts5Hash **ppNew, int *pnByte){
  int rc = SQLITE_OK;
................................................................................

  apNew = (Fts5HashEntry**)sqlite3_malloc(nNew*sizeof(Fts5HashEntry*));
  if( !apNew ) return SQLITE_NOMEM;
  memset(apNew, 0, nNew*sizeof(Fts5HashEntry*));

  for(i=0; i<pHash->nSlot; i++){
    while( apOld[i] ){
      unsigned int iHash;
      Fts5HashEntry *p = apOld[i];
      apOld[i] = p->pHashNext;
      iHash = fts5HashKey(nNew, (u8*)fts5EntryKey(p),
                          (int)strlen(fts5EntryKey(p)));
      p->pHashNext = apNew[iHash];
      apNew[iHash] = p;
    }
  }

  sqlite3_free(apOld);
  pHash->nSlot = nNew;
................................................................................
  int bNew;                       /* If non-delete entry should be written */
  
  bNew = (pHash->eDetail==FTS5_DETAIL_FULL);

  /* Attempt to locate an existing hash entry */
  iHash = fts5HashKey2(pHash->nSlot, (u8)bByte, (const u8*)pToken, nToken);
  for(p=pHash->aSlot[iHash]; p; p=p->pHashNext){
    char *zKey = fts5EntryKey(p);
    if( zKey[0]==bByte 
     && p->nKey==nToken
     && memcmp(&zKey[1], pToken, nToken)==0 
    ){
      break;
    }
  }

  /* If an existing hash entry cannot be found, create a new one. */
  if( p==0 ){
    /* Figure out how much space to allocate */
    char *zKey;
    int nByte = sizeof(Fts5HashEntry) + (nToken+1) + 1 + 64;
    if( nByte<128 ) nByte = 128;

    /* Grow the Fts5Hash.aSlot[] array if necessary. */
    if( (pHash->nEntry*2)>=pHash->nSlot ){
      int rc = fts5HashResize(pHash);
      if( rc!=SQLITE_OK ) return rc;
      iHash = fts5HashKey2(pHash->nSlot, (u8)bByte, (const u8*)pToken, nToken);
    }

    /* Allocate new Fts5HashEntry and add it to the hash table. */
    p = (Fts5HashEntry*)sqlite3_malloc(nByte);
    if( !p ) return SQLITE_NOMEM;
    memset(p, 0, sizeof(Fts5HashEntry));
    p->nAlloc = nByte;
    zKey = fts5EntryKey(p);
    zKey[0] = bByte;
    memcpy(&zKey[1], pToken, nToken);
    assert( iHash==fts5HashKey(pHash->nSlot, (u8*)zKey, nToken+1) );
    p->nKey = nToken;
    zKey[nToken+1] = '\0';
    p->nData = nToken+1 + 1 + sizeof(Fts5HashEntry);
    p->pHashNext = pHash->aSlot[iHash];
    pHash->aSlot[iHash] = p;
    pHash->nEntry++;

    /* Add the first rowid field to the hash-entry */
    p->nData += sqlite3Fts5PutVarint(&((u8*)p)[p->nData], iRowid);
    p->iRowid = iRowid;
................................................................................
      *ppOut = p2;
      p2 = 0;
    }else if( p2==0 ){
      *ppOut = p1;
      p1 = 0;
    }else{
      int i = 0;
      char *zKey1 = fts5EntryKey(p1);
      char *zKey2 = fts5EntryKey(p2);
      while( zKey1[i]==zKey2[i] ) i++;


      if( ((u8)zKey1[i])>((u8)zKey2[i]) ){
        /* p2 is smaller */
        *ppOut = p2;
        ppOut = &p2->pScanNext;
        p2 = p2->pScanNext;
      }else{
        /* p1 is smaller */
        *ppOut = p1;
................................................................................
  ap = sqlite3_malloc(sizeof(Fts5HashEntry*) * nMergeSlot);
  if( !ap ) return SQLITE_NOMEM;
  memset(ap, 0, sizeof(Fts5HashEntry*) * nMergeSlot);

  for(iSlot=0; iSlot<pHash->nSlot; iSlot++){
    Fts5HashEntry *pIter;
    for(pIter=pHash->aSlot[iSlot]; pIter; pIter=pIter->pHashNext){
      if( pTerm==0 || 0==memcmp(fts5EntryKey(pIter), pTerm, nTerm) ){
        Fts5HashEntry *pEntry = pIter;
        pEntry->pScanNext = 0;
        for(i=0; ap[i]; i++){
          pEntry = fts5HashEntryMerge(pEntry, ap[i]);
          ap[i] = 0;
        }
        ap[i] = pEntry;
................................................................................
int sqlite3Fts5HashQuery(
  Fts5Hash *pHash,                /* Hash table to query */
  const char *pTerm, int nTerm,   /* Query term */
  const u8 **ppDoclist,           /* OUT: Pointer to doclist for pTerm */
  int *pnDoclist                  /* OUT: Size of doclist in bytes */
){
  unsigned int iHash = fts5HashKey(pHash->nSlot, (const u8*)pTerm, nTerm);
  char *zKey = 0;
  Fts5HashEntry *p;

  for(p=pHash->aSlot[iHash]; p; p=p->pHashNext){
    zKey = fts5EntryKey(p);
    if( memcmp(zKey, pTerm, nTerm)==0 && zKey[nTerm]==0 ) break;
  }

  if( p ){
    fts5HashAddPoslistSize(pHash, p);
    *ppDoclist = (const u8*)&zKey[nTerm+1];
    *pnDoclist = p->nData - (sizeof(Fts5HashEntry) + nTerm + 1);
  }else{
    *ppDoclist = 0;
    *pnDoclist = 0;
  }

  return SQLITE_OK;
}
................................................................................
  Fts5Hash *pHash,
  const char **pzTerm,            /* OUT: term (nul-terminated) */
  const u8 **ppDoclist,           /* OUT: pointer to doclist */
  int *pnDoclist                  /* OUT: size of doclist in bytes */
){
  Fts5HashEntry *p;
  if( (p = pHash->pScan) ){
    char *zKey = fts5EntryKey(p);
    int nTerm = (int)strlen(zKey);
    fts5HashAddPoslistSize(pHash, p);
    *pzTerm = zKey;
    *ppDoclist = (const u8*)&zKey[nTerm+1];
    *pnDoclist = p->nData - (sizeof(Fts5HashEntry) + nTerm + 1);
  }else{
    *pzTerm = 0;
    *ppDoclist = 0;
    *pnDoclist = 0;
  }
}

Changes to ext/fts5/fts5_index.c.

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static int fts5IndexPrepareStmt(
  Fts5Index *p,
  sqlite3_stmt **ppStmt,
  char *zSql
){
  if( p->rc==SQLITE_OK ){
    if( zSql ){
      p->rc = sqlite3_prepare_v2(p->pConfig->db, zSql, -1, ppStmt, 0);

    }else{
      p->rc = SQLITE_NOMEM;
    }
  }
  sqlite3_free(zSql);
  return p->rc;
}
................................................................................
    char *zSql = sqlite3_mprintf(
        "DELETE FROM '%q'.'%q_data' WHERE id>=? AND id<=?", 
          pConfig->zDb, pConfig->zName
    );
    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v2(pConfig->db, zSql, -1, &p->pDeleter, 0);

      sqlite3_free(zSql);
    }
    if( rc!=SQLITE_OK ){
      p->rc = rc;
      return;
    }
  }
................................................................................
  int nInput;                     /* Number of input segments */
  Fts5SegWriter writer;           /* Writer object */
  Fts5StructureSegment *pSeg;     /* Output segment */
  Fts5Buffer term;
  int bOldest;                    /* True if the output segment is the oldest */
  int eDetail = p->pConfig->eDetail;
  const int flags = FTS5INDEX_QUERY_NOOUTPUT;


  assert( iLvl<pStruct->nLevel );
  assert( pLvl->nMerge<=pLvl->nSeg );

  memset(&writer, 0, sizeof(Fts5SegWriter));
  memset(&term, 0, sizeof(Fts5Buffer));
  if( pLvl->nMerge ){
................................................................................
      fts5MultiIterNext(p, pIter, 0, 0)
  ){
    Fts5SegIter *pSegIter = &pIter->aSeg[ pIter->aFirst[1].iFirst ];
    int nPos;                     /* position-list size field value */
    int nTerm;
    const u8 *pTerm;

    /* Check for key annihilation. */
    if( pSegIter->nPos==0 && (bOldest || pSegIter->bDel==0) ) continue;

    pTerm = fts5MultiIterTerm(pIter, &nTerm);
    if( nTerm!=term.n || memcmp(pTerm, term.p, nTerm) ){
      if( pnRem && writer.nLeafWritten>nRem ){
        break;
      }








      /* This is a new term. Append a term to the output segment. */
      fts5WriteAppendTerm(p, &writer, nTerm, pTerm);
      fts5BufferSet(&p->rc, &term, nTerm, pTerm);

    }

    /* Append the rowid to the output */
    /* WRITEPOSLISTSIZE */
    fts5WriteAppendRowid(p, &writer, fts5MultiIterRowid(pIter));

    if( eDetail==FTS5_DETAIL_NONE ){
................................................................................
    }
    fts5MultiIterFree(p1);

    pData = fts5IdxMalloc(p, sizeof(Fts5Data) + doclist.n);
    if( pData ){
      pData->p = (u8*)&pData[1];
      pData->nn = pData->szLeaf = doclist.n;
      memcpy(pData->p, doclist.p, doclist.n);
      fts5MultiIterNew2(p, pData, bDesc, ppIter);
    }
    fts5BufferFree(&doclist);
  }

  fts5StructureRelease(pStruct);
  sqlite3_free(aBuf);
................................................................................
  Fts5Buffer buf = {0, 0, 0};

  /* If the QUERY_SCAN flag is set, all other flags must be clear. */
  assert( (flags & FTS5INDEX_QUERY_SCAN)==0 || flags==FTS5INDEX_QUERY_SCAN );

  if( sqlite3Fts5BufferSize(&p->rc, &buf, nToken+1)==0 ){
    int iIdx = 0;                 /* Index to search */
    memcpy(&buf.p[1], pToken, nToken);

    /* Figure out which index to search and set iIdx accordingly. If this
    ** is a prefix query for which there is no prefix index, set iIdx to
    ** greater than pConfig->nPrefix to indicate that the query will be
    ** satisfied by scanning multiple terms in the main index.
    **
    ** If the QUERY_TEST_NOIDX flag was specified, then this must be a
................................................................................
      if( p->rc==SQLITE_OK ){
        Fts5SegIter *pSeg = &pRet->aSeg[pRet->aFirst[1].iFirst];
        if( pSeg->pLeaf ) pRet->xSetOutputs(pRet, pSeg);
      }
    }

    if( p->rc ){
      sqlite3Fts5IterClose(&pRet->base);
      pRet = 0;
      fts5CloseReader(p);
    }

    *ppIter = &pRet->base;
    sqlite3Fts5BufferFree(&buf);
  }







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static int fts5IndexPrepareStmt(
  Fts5Index *p,
  sqlite3_stmt **ppStmt,
  char *zSql
){
  if( p->rc==SQLITE_OK ){
    if( zSql ){
      p->rc = sqlite3_prepare_v3(p->pConfig->db, zSql, -1,
                                 SQLITE_PREPARE_PERSISTENT, ppStmt, 0);
    }else{
      p->rc = SQLITE_NOMEM;
    }
  }
  sqlite3_free(zSql);
  return p->rc;
}
................................................................................
    char *zSql = sqlite3_mprintf(
        "DELETE FROM '%q'.'%q_data' WHERE id>=? AND id<=?", 
          pConfig->zDb, pConfig->zName
    );
    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v3(pConfig->db, zSql, -1,
                              SQLITE_PREPARE_PERSISTENT, &p->pDeleter, 0);
      sqlite3_free(zSql);
    }
    if( rc!=SQLITE_OK ){
      p->rc = rc;
      return;
    }
  }
................................................................................
  int nInput;                     /* Number of input segments */
  Fts5SegWriter writer;           /* Writer object */
  Fts5StructureSegment *pSeg;     /* Output segment */
  Fts5Buffer term;
  int bOldest;                    /* True if the output segment is the oldest */
  int eDetail = p->pConfig->eDetail;
  const int flags = FTS5INDEX_QUERY_NOOUTPUT;
  int bTermWritten = 0;           /* True if current term already output */

  assert( iLvl<pStruct->nLevel );
  assert( pLvl->nMerge<=pLvl->nSeg );

  memset(&writer, 0, sizeof(Fts5SegWriter));
  memset(&term, 0, sizeof(Fts5Buffer));
  if( pLvl->nMerge ){
................................................................................
      fts5MultiIterNext(p, pIter, 0, 0)
  ){
    Fts5SegIter *pSegIter = &pIter->aSeg[ pIter->aFirst[1].iFirst ];
    int nPos;                     /* position-list size field value */
    int nTerm;
    const u8 *pTerm;




    pTerm = fts5MultiIterTerm(pIter, &nTerm);
    if( nTerm!=term.n || memcmp(pTerm, term.p, nTerm) ){
      if( pnRem && writer.nLeafWritten>nRem ){
        break;
      }
      fts5BufferSet(&p->rc, &term, nTerm, pTerm);
      bTermWritten =0;
    }

    /* Check for key annihilation. */
    if( pSegIter->nPos==0 && (bOldest || pSegIter->bDel==0) ) continue;

    if( p->rc==SQLITE_OK && bTermWritten==0 ){
      /* This is a new term. Append a term to the output segment. */
      fts5WriteAppendTerm(p, &writer, nTerm, pTerm);

      bTermWritten = 1;
    }

    /* Append the rowid to the output */
    /* WRITEPOSLISTSIZE */
    fts5WriteAppendRowid(p, &writer, fts5MultiIterRowid(pIter));

    if( eDetail==FTS5_DETAIL_NONE ){
................................................................................
    }
    fts5MultiIterFree(p1);

    pData = fts5IdxMalloc(p, sizeof(Fts5Data) + doclist.n);
    if( pData ){
      pData->p = (u8*)&pData[1];
      pData->nn = pData->szLeaf = doclist.n;
      if( doclist.n ) memcpy(pData->p, doclist.p, doclist.n);
      fts5MultiIterNew2(p, pData, bDesc, ppIter);
    }
    fts5BufferFree(&doclist);
  }

  fts5StructureRelease(pStruct);
  sqlite3_free(aBuf);
................................................................................
  Fts5Buffer buf = {0, 0, 0};

  /* If the QUERY_SCAN flag is set, all other flags must be clear. */
  assert( (flags & FTS5INDEX_QUERY_SCAN)==0 || flags==FTS5INDEX_QUERY_SCAN );

  if( sqlite3Fts5BufferSize(&p->rc, &buf, nToken+1)==0 ){
    int iIdx = 0;                 /* Index to search */
    if( nToken ) memcpy(&buf.p[1], pToken, nToken);

    /* Figure out which index to search and set iIdx accordingly. If this
    ** is a prefix query for which there is no prefix index, set iIdx to
    ** greater than pConfig->nPrefix to indicate that the query will be
    ** satisfied by scanning multiple terms in the main index.
    **
    ** If the QUERY_TEST_NOIDX flag was specified, then this must be a
................................................................................
      if( p->rc==SQLITE_OK ){
        Fts5SegIter *pSeg = &pRet->aSeg[pRet->aFirst[1].iFirst];
        if( pSeg->pLeaf ) pRet->xSetOutputs(pRet, pSeg);
      }
    }

    if( p->rc ){
      sqlite3Fts5IterClose((Fts5IndexIter*)pRet);
      pRet = 0;
      fts5CloseReader(p);
    }

    *ppIter = &pRet->base;
    sqlite3Fts5BufferFree(&buf);
  }

Changes to ext/fts5/fts5_main.c.

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  va_list ap;

  va_start(ap, zFmt);
  zSql = sqlite3_vmprintf(zFmt, ap);
  if( zSql==0 ){
    rc = SQLITE_NOMEM; 
  }else{
    rc = sqlite3_prepare_v2(pConfig->db, zSql, -1, &pRet, 0);

    if( rc!=SQLITE_OK ){
      *pConfig->pzErrmsg = sqlite3_mprintf("%s", sqlite3_errmsg(pConfig->db));
    }
    sqlite3_free(zSql);
  }

  va_end(ap);
................................................................................
  const char *zRank = pCsr->zRank;
  const char *zRankArgs = pCsr->zRankArgs;

  if( zRankArgs ){
    char *zSql = sqlite3Fts5Mprintf(&rc, "SELECT %s", zRankArgs);
    if( zSql ){
      sqlite3_stmt *pStmt = 0;
      rc = sqlite3_prepare_v2(pConfig->db, zSql, -1, &pStmt, 0);

      sqlite3_free(zSql);
      assert( rc==SQLITE_OK || pCsr->pRankArgStmt==0 );
      if( rc==SQLITE_OK ){
        if( SQLITE_ROW==sqlite3_step(pStmt) ){
          int nByte;
          pCsr->nRankArg = sqlite3_column_count(pStmt);
          nByte = sizeof(sqlite3_value*)*pCsr->nRankArg;







|
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  va_list ap;

  va_start(ap, zFmt);
  zSql = sqlite3_vmprintf(zFmt, ap);
  if( zSql==0 ){
    rc = SQLITE_NOMEM; 
  }else{
    rc = sqlite3_prepare_v3(pConfig->db, zSql, -1, 
                            SQLITE_PREPARE_PERSISTENT, &pRet, 0);
    if( rc!=SQLITE_OK ){
      *pConfig->pzErrmsg = sqlite3_mprintf("%s", sqlite3_errmsg(pConfig->db));
    }
    sqlite3_free(zSql);
  }

  va_end(ap);
................................................................................
  const char *zRank = pCsr->zRank;
  const char *zRankArgs = pCsr->zRankArgs;

  if( zRankArgs ){
    char *zSql = sqlite3Fts5Mprintf(&rc, "SELECT %s", zRankArgs);
    if( zSql ){
      sqlite3_stmt *pStmt = 0;
      rc = sqlite3_prepare_v3(pConfig->db, zSql, -1,
                              SQLITE_PREPARE_PERSISTENT, &pStmt, 0);
      sqlite3_free(zSql);
      assert( rc==SQLITE_OK || pCsr->pRankArgStmt==0 );
      if( rc==SQLITE_OK ){
        if( SQLITE_ROW==sqlite3_step(pStmt) ){
          int nByte;
          pCsr->nRankArg = sqlite3_column_count(pStmt);
          nByte = sizeof(sqlite3_value*)*pCsr->nRankArg;

Changes to ext/fts5/fts5_storage.c.

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        zSql = sqlite3_mprintf(azStmt[eStmt], pC->zDb, pC->zName);
        break;
    }

    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v2(pC->db, zSql, -1, &p->aStmt[eStmt], 0);

      sqlite3_free(zSql);
      if( rc!=SQLITE_OK && pzErrMsg ){
        *pzErrMsg = sqlite3_mprintf("%s", sqlite3_errmsg(pC->db));
      }
    }
  }








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        zSql = sqlite3_mprintf(azStmt[eStmt], pC->zDb, pC->zName);
        break;
    }

    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v3(pC->db, zSql, -1,
                              SQLITE_PREPARE_PERSISTENT, &p->aStmt[eStmt], 0);
      sqlite3_free(zSql);
      if( rc!=SQLITE_OK && pzErrMsg ){
        *pzErrMsg = sqlite3_mprintf("%s", sqlite3_errmsg(pC->db));
      }
    }
  }

Changes to ext/fts5/fts5_test_tok.c.

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  sqlite3_vtab **ppVtab,          /* OUT: New sqlite3_vtab object */
  char **pzErr                    /* OUT: sqlite3_malloc'd error message */
){
  fts5_api *pApi = (fts5_api*)pCtx;
  Fts5tokTable *pTab = 0;
  int rc;
  char **azDequote = 0;
  int nDequote;

  rc = sqlite3_declare_vtab(db, 
       "CREATE TABLE x(input HIDDEN, token, start, end, position)"
  );

  if( rc==SQLITE_OK ){
    nDequote = argc-3;







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  sqlite3_vtab **ppVtab,          /* OUT: New sqlite3_vtab object */
  char **pzErr                    /* OUT: sqlite3_malloc'd error message */
){
  fts5_api *pApi = (fts5_api*)pCtx;
  Fts5tokTable *pTab = 0;
  int rc;
  char **azDequote = 0;
  int nDequote = 0;

  rc = sqlite3_declare_vtab(db, 
       "CREATE TABLE x(input HIDDEN, token, start, end, position)"
  );

  if( rc==SQLITE_OK ){
    nDequote = argc-3;

Added ext/fts5/test/fts5delete.test.













































































































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# 2017 May 12
#
# 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 regression tests for SQLite library.  The
# focus of this script is testing the FTS5 module.
#

source [file join [file dirname [info script]] fts5_common.tcl]
set testprefix fts5delete

# If SQLITE_ENABLE_FTS5 is not defined, omit this file.
ifcapable !fts5 {
  finish_test
  return
}
fts5_aux_test_functions db

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(x);
  WITH s(i) AS (
    SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<5000
  )
  INSERT INTO t1(rowid, x) SELECT i, (i/2)*2 FROM s;
}

do_test 1.1 {
  execsql BEGIN
  for {set i 1} {$i<=5000} {incr i} {
    if {$i % 2} {
      execsql { INSERT INTO t1 VALUES($i) }
    } else {
      execsql { DELETE FROM t1 WHERE rowid = $i }
    }
  }
  execsql COMMIT
} {}

do_test 1.2 {
  execsql { INSERT INTO t1(t1, rank) VALUES('usermerge', 2); }
  for {set i 0} {$i < 5} {incr i} {
    execsql { INSERT INTO t1(t1, rank) VALUES('merge', 1) }
    execsql { INSERT INTO t1(t1) VALUES('integrity-check') }
  }
} {}

finish_test

Added ext/fts5/test/fts5leftjoin.test.



























































































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# 2014 June 17
#
# 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 regression tests for SQLite library.  The
# focus of this script is testing the FTS5 module.
#

source [file join [file dirname [info script]] fts5_common.tcl]
set testprefix fts5leftjoin

# If SQLITE_ENABLE_FTS5 is not defined, omit this file.
ifcapable !fts5 {
  finish_test
  return
}

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE vt USING fts5(x);
  INSERT INTO vt VALUES('abc');
  INSERT INTO vt VALUES('xyz');

  CREATE TABLE t1(a INTEGER PRIMARY KEY);
  INSERT INTO t1 VALUES(1), (2);
}

do_execsql_test 1.1 {
  SELECT * FROM t1 LEFT JOIN (
    SELECT rowid AS rrr, * FROM vt WHERE vt MATCH 'abc'
  ) ON t1.a = rrr
} {1 1 abc 2 {} {}}

do_execsql_test 1.2 {
  SELECT * FROM t1 LEFT JOIN vt ON (vt MATCH 'abc')
} {1 abc 2 abc}

finish_test


Changes to ext/fts5/test/fts5rank.test.

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  execsql { SELECT rowid FROM tt('a') ORDER BY rank; } db2
} {1 3 2}

do_test 2.7 {
  execsql { SELECT rowid FROM tt('a') ORDER BY rank; } db
} {1 3 2}



#--------------------------------------------------------------------------
# At one point there was a problem with queries such as:
#
#   ... MATCH 'x OR y' ORDER BY rank;
#
# if there were zero occurrences of token 'y' in the dataset. The







>







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  execsql { SELECT rowid FROM tt('a') ORDER BY rank; } db2
} {1 3 2}

do_test 2.7 {
  execsql { SELECT rowid FROM tt('a') ORDER BY rank; } db
} {1 3 2}

db2 close

#--------------------------------------------------------------------------
# At one point there was a problem with queries such as:
#
#   ... MATCH 'x OR y' ORDER BY rank;
#
# if there were zero occurrences of token 'y' in the dataset. The

Added ext/lsm1/Makefile.

















































































































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#
# This Makefile is designed for use with main.mk in the root directory of
# this project. After including main.mk, the users makefile should contain:
#
#    LSMDIR=$(TOP)/ext/lsm1/
#    include $(LSMDIR)/Makefile
#
# The most useful targets are [lsmtest] and [lsm.so].
#

LSMOBJ    = \
  lsm_ckpt.o \
  lsm_file.o \
  lsm_log.o \
  lsm_main.o \
  lsm_mem.o \
  lsm_mutex.o \
  lsm_shared.o \
  lsm_sorted.o \
  lsm_str.o \
  lsm_tree.o \
  lsm_unix.o \
  lsm_win32.o \
  lsm_varint.o \
  lsm_vtab.o

LSMHDR   = \
  $(LSMDIR)/lsm.h \
  $(LSMDIR)/lsmInt.h

LSMTESTSRC = $(LSMDIR)/lsm-test/lsmtest1.c $(LSMDIR)/lsm-test/lsmtest2.c     \
             $(LSMDIR)/lsm-test/lsmtest3.c $(LSMDIR)/lsm-test/lsmtest4.c     \
             $(LSMDIR)/lsm-test/lsmtest5.c $(LSMDIR)/lsm-test/lsmtest6.c     \
             $(LSMDIR)/lsm-test/lsmtest7.c $(LSMDIR)/lsm-test/lsmtest8.c     \
             $(LSMDIR)/lsm-test/lsmtest9.c                                   \
             $(LSMDIR)/lsm-test/lsmtest_datasource.c \
             $(LSMDIR)/lsm-test/lsmtest_func.c $(LSMDIR)/lsm-test/lsmtest_io.c  \
             $(LSMDIR)/lsm-test/lsmtest_main.c $(LSMDIR)/lsm-test/lsmtest_mem.c \
             $(LSMDIR)/lsm-test/lsmtest_tdb.c $(LSMDIR)/lsm-test/lsmtest_tdb3.c \
             $(LSMDIR)/lsm-test/lsmtest_util.c $(LSMDIR)/lsm-test/lsmtest_win32.c


# all: lsm.so

LSMOPTS = -DLSM_MUTEX_PTHREADS=1 -I$(LSMDIR)

lsm.so:	$(LSMOBJ)
	$(TCCX) -shared -o lsm.so $(LSMOBJ)

%.o:	$(LSMDIR)/%.c $(LSMHDR) sqlite3.h
	$(TCCX) $(LSMOPTS) -c $<
	
lsmtest$(EXE): $(LSMOBJ) $(LSMTESTSRC) $(LSMTESTHDR) sqlite3.o
	# $(TCPPX) -c $(TOP)/lsm-test/lsmtest_tdb2.cc
	$(TCCX) $(LSMOPTS) $(LSMTESTSRC) $(LSMOBJ) sqlite3.o -o lsmtest$(EXE) $(THREADLIB) 

Added ext/lsm1/Makefile.msc.

























































































































































































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#
# This Makefile is designed for use with main.mk in the root directory of
# this project. After including main.mk, the users makefile should contain:
#
#    LSMDIR=$(TOP)\ext\lsm1\
#    include $(LSMDIR)\Makefile.msc
#
# The most useful targets are [lsmtest.exe] and [lsm.dll].
#

LSMOBJ    = \
  lsm_ckpt.lo \
  lsm_file.lo \
  lsm_log.lo \
  lsm_main.lo \
  lsm_mem.lo \
  lsm_mutex.lo \
  lsm_shared.lo \
  lsm_sorted.lo \
  lsm_str.lo \
  lsm_tree.lo \
  lsm_unix.lo \
  lsm_win32.lo \
  lsm_varint.lo \
  lsm_vtab.lo

LSMHDR   = \
  $(LSMDIR)\lsm.h \
  $(LSMDIR)\lsmInt.h

LSMTESTSRC = $(LSMDIR)\lsm-test\lsmtest1.c $(LSMDIR)\lsm-test\lsmtest2.c     \
             $(LSMDIR)\lsm-test\lsmtest3.c $(LSMDIR)\lsm-test\lsmtest4.c     \
             $(LSMDIR)\lsm-test\lsmtest5.c $(LSMDIR)\lsm-test\lsmtest6.c     \
             $(LSMDIR)\lsm-test\lsmtest7.c $(LSMDIR)\lsm-test\lsmtest8.c     \
             $(LSMDIR)\lsm-test\lsmtest9.c                                   \
             $(LSMDIR)\lsm-test\lsmtest_datasource.c \
             $(LSMDIR)\lsm-test\lsmtest_func.c $(LSMDIR)\lsm-test\lsmtest_io.c  \
             $(LSMDIR)\lsm-test\lsmtest_main.c $(LSMDIR)\lsm-test\lsmtest_mem.c \
             $(LSMDIR)\lsm-test\lsmtest_tdb.c $(LSMDIR)\lsm-test\lsmtest_tdb3.c \
             $(LSMDIR)\lsm-test\lsmtest_util.c $(LSMDIR)\lsm-test\lsmtest_win32.c

# all: lsm.dll

LSMOPTS = -DLSM_MUTEX_WIN32=1 -I$(LSMDIR)

lsm_ckpt.lo:	$(LSMDIR)\lsm_ckpt.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_ckpt.c

lsm_file.lo:	$(LSMDIR)\lsm_file.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_file.c

lsm_log.lo:	$(LSMDIR)\lsm_log.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_log.c

lsm_main.lo:	$(LSMDIR)\lsm_main.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_main.c

lsm_mem.lo:	$(LSMDIR)\lsm_mem.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_mem.c

lsm_mutex.lo:	$(LSMDIR)\lsm_mutex.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_mutex.c

lsm_shared.lo:	$(LSMDIR)\lsm_shared.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_shared.c

lsm_sorted.lo:	$(LSMDIR)\lsm_sorted.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_sorted.c

lsm_str.lo:	$(LSMDIR)\lsm_str.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_str.c

lsm_tree.lo:	$(LSMDIR)\lsm_tree.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_tree.c

lsm_unix.lo:	$(LSMDIR)\lsm_unix.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_unix.c

lsm_win32.lo:	$(LSMDIR)\lsm_win32.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_win32.c

lsm_varint.lo:	$(LSMDIR)\lsm_varint.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_varint.c

lsm_vtab.lo:	$(LSMDIR)\lsm_vtab.c $(LSMHDR) $(SQLITE3H)
	$(LTCOMPILE) $(LSMOPTS) -c $(LSMDIR)\lsm_vtab.c

lsm.dll:	$(LSMOBJ)
	$(LD) $(LDFLAGS) $(LTLINKOPTS) $(LTLIBPATHS) /DLL /OUT:$@ $(LSMOBJ)

lsmtest.exe: $(LSMOBJ) $(LSMTESTSRC) $(LSMTESTHDR) $(LIBOBJS1)
	$(LTLINK) $(LSMOPTS) $(LSMTESTSRC) /link $(LSMOBJ) $(LIBOBJS1)

Added ext/lsm1/lsm-test/README.

















































































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Organization of test case files:

  lsmtest1.c: Data tests. Tests that perform many inserts and deletes on a 
              database file, then verify that the contents of the database can
              be queried.

  lsmtest2.c: Crash tests. Tests that attempt to verify that the database 
              recovers correctly following an application or system crash.

  lsmtest3.c: Rollback tests. Tests that focus on the explicit rollback of
              transactions and sub-transactions.

  lsmtest4.c: Multi-client tests.

  lsmtest5.c: Multi-client tests with a different thread for each client.

  lsmtest6.c: OOM injection tests.

  lsmtest7.c: API tests.

  lsmtest8.c: Writer crash tests. Tests in this file attempt to verify that
              the system recovers and other clients proceed unaffected if
              a process fails in the middle of a write transaction.

              The difference from lsmtest2.c is that this file tests
              live-recovery (recovery from a failure that occurs while other
              clients are still running) whereas lsmtest2.c tests recovery
              from a system or power failure.

  lsmtest9.c: More data tests. These focus on testing that calling
              lsm_work(nMerge=1) to compact the database does not corrupt it.
              In other words, that databases containing block-redirects
              can be read and written.





Added ext/lsm1/lsm-test/lsmtest.h.

































































































































































































































































































































































































































































































































































































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#ifndef __WRAPPER_INT_H_
#define __WRAPPER_INT_H_

#include "lsmtest_tdb.h"
#include "sqlite3.h"
#include "lsm.h"

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

#ifdef __cplusplus
extern "C" {
#endif

#ifdef _WIN32
# include "windows.h"
# define gettimeofday win32GetTimeOfDay
# define F_OK  (0)
# define sleep(sec) Sleep(1000 * (sec))
# define usleep(usec) Sleep((usec) / 1000)
# ifdef _MSC_VER
#  include <io.h>
#  define snprintf _snprintf
#  define fsync(fd) FlushFileBuffers((HANDLE)_get_osfhandle((fd)))
#  define fdatasync(fd) FlushFileBuffers((HANDLE)_get_osfhandle((fd)))
#  define __va_copy(dst,src) ((dst) = (src))
#  define ftruncate(fd,sz) ((_chsize_s((fd), (sz))==0) ? 0 : -1)
# else
#  error Unsupported C compiler for Windows.
# endif
int win32GetTimeOfDay(struct timeval *, void *);
#endif

#ifndef _LSM_INT_H
typedef unsigned int  u32;
typedef unsigned char u8;
typedef long long int i64;
typedef unsigned long long int u64;
#endif


#define ArraySize(x) ((int)(sizeof(x) / sizeof((x)[0])))

#define MIN(x,y) ((x)<(y) ? (x) : (y))
#define MAX(x,y) ((x)>(y) ? (x) : (y))

#define unused_parameter(x) (void)(x)

#define TESTDB_DEFAULT_PAGE_SIZE   4096
#define TESTDB_DEFAULT_CACHE_SIZE  2048

/*
** Ideally, these should be in wrapper.c. But they are here instead so that 
** they can be used by the C++ database wrappers in wrapper2.cc.
*/
typedef struct DatabaseMethods DatabaseMethods;
struct TestDb {
  DatabaseMethods const *pMethods;          /* Database methods */
  const char *zLibrary;                     /* Library name for tdb_open() */
};
struct DatabaseMethods {
  int (*xClose)(TestDb *);
  int (*xWrite)(TestDb *, void *, int , void *, int);
  int (*xDelete)(TestDb *, void *, int);
  int (*xDeleteRange)(TestDb *, void *, int, void *, int);
  int (*xFetch)(TestDb *, void *, int, void **, int *);
  int (*xScan)(TestDb *, void *, int, void *, int, void *, int,
    void (*)(void *, void *, int , void *, int)
  );
  int (*xBegin)(TestDb *, int);
  int (*xCommit)(TestDb *, int);
  int (*xRollback)(TestDb *, int);
};

/* 
** Functions in wrapper2.cc (a C++ source file). wrapper2.cc contains the
** wrapper for Kyoto Cabinet. Kyoto cabinet has a C API, but
** the primary interface is the C++ API.
*/
int test_kc_open(const char*, const char *zFilename, int bClear, TestDb **ppDb);
int test_kc_close(TestDb *);
int test_kc_write(TestDb *, void *, int , void *, int);
int test_kc_delete(TestDb *, void *, int);
int test_kc_delete_range(TestDb *, void *, int, void *, int);
int test_kc_fetch(TestDb *, void *, int, void **, int *);
int test_kc_scan(TestDb *, void *, int, void *, int, void *, int,
  void (*)(void *, void *, int , void *, int)
);

int test_mdb_open(const char*, const char *zFile, int bClear, TestDb **ppDb);
int test_mdb_close(TestDb *);
int test_mdb_write(TestDb *, void *, int , void *, int);
int test_mdb_delete(TestDb *, void *, int);
int test_mdb_fetch(TestDb *, void *, int, void **, int *);
int test_mdb_scan(TestDb *, void *, int, void *, int, void *, int,
  void (*)(void *, void *, int , void *, int)
);

/* 
** Functions in wrapper3.c. This file contains the tdb wrapper for lsm.
** The wrapper for lsm is a bit more involved than the others, as it 
** includes code for a couple of different lsm configurations, and for
** various types of fault injection and robustness testing.
*/
int test_lsm_open(const char*, const char *zFile, int bClear, TestDb **ppDb);
int test_lsm_lomem_open(const char*, const char*, int bClear, TestDb **ppDb);
int test_lsm_zip_open(const char*, const char*, int bClear, TestDb **ppDb);
int test_lsm_small_open(const char*, const char*, int bClear, TestDb **ppDb);
int test_lsm_mt2(const char*, const char *zFile, int bClear, TestDb **ppDb);
int test_lsm_mt3(const char*, const char *zFile, int bClear, TestDb **ppDb);

int tdb_lsm_configure(lsm_db *, const char *);

/* Functions in lsmtest_tdb4.c */
int test_bt_open(const char*, const char *zFile, int bClear, TestDb **ppDb);
int test_fbt_open(const char*, const char *zFile, int bClear, TestDb **ppDb);
int test_fbts_open(const char*, const char *zFile, int bClear, TestDb **ppDb);


/* Functions in testutil.c. */
int  testPrngInit(void);
u32  testPrngValue(u32 iVal);
void testPrngArray(u32 iVal, u32 *aOut, int nOut);
void testPrngString(u32 iVal, char *aOut, int nOut);

void testErrorInit(int argc, char **);
void testPrintError(const char *zFormat, ...);
void testPrintUsage(const char *zArgs);
void testPrintFUsage(const char *zFormat, ...);
void testTimeInit(void);
int  testTimeGet(void);

/* Functions in testmem.c. */
void testMallocInstall(lsm_env *pEnv);
void testMallocUninstall(lsm_env *pEnv);
void testMallocCheck(lsm_env *pEnv, int *, int *, FILE *);
void testMallocOom(lsm_env *pEnv, int, int, void(*)(void*), void *);
void testMallocOomEnable(lsm_env *pEnv, int);

/* lsmtest.c */
TestDb *testOpen(const char *zSystem, int, int *pRc);
void testReopen(TestDb **ppDb, int *pRc);
void testClose(TestDb **ppDb);

void testFetch(TestDb *, void *, int, void *, int, int *);
void testWrite(TestDb *, void *, int, void *, int, int *);
void testDelete(TestDb *, void *, int, int *);
void testDeleteRange(TestDb *, void *, int, void *, int, int *);
void testWriteStr(TestDb *, const char *, const char *zVal, int *pRc);
void testFetchStr(TestDb *, const char *, const char *, int *pRc);

void testBegin(TestDb *pDb, int iTrans, int *pRc);
void testCommit(TestDb *pDb, int iTrans, int *pRc);

void test_failed(void);

char *testMallocPrintf(const char *zFormat, ...);
char *testMallocVPrintf(const char *zFormat, va_list ap);
int testGlobMatch(const char *zPattern, const char *zStr);

void testScanCompare(TestDb *, TestDb *, int, void *, int, void *, int, int *);
void testFetchCompare(TestDb *, TestDb *, void *, int, int *);

void *testMalloc(int);
void *testMallocCopy(void *pCopy, int nByte);
void *testRealloc(void *, int);
void testFree(void *);

/* lsmtest_bt.c */
int do_bt(int nArg, char **azArg);

/* testio.c */
int testVfsConfigureDb(TestDb *pDb);

/* testfunc.c */
int do_show(int nArg, char **azArg);
int do_work(int nArg, char **azArg);

/* testio.c */
int do_io(int nArg, char **azArg);

/* lsmtest2.c */
void do_crash_test(const char *zPattern, int *pRc);
int do_rollback_test(int nArg, char **azArg);

/* test3.c */
void test_rollback(const char *zSystem, const char *zPattern, int *pRc);

/* test4.c */
void test_mc(const char *zSystem, const char *zPattern, int *pRc);

/* test5.c */
void test_mt(const char *zSystem, const char *zPattern, int *pRc);

/* lsmtest6.c */
void test_oom(const char *zPattern, int *pRc);
void testDeleteLsmdb(const char *zFile);

void testSaveDb(const char *zFile, const char *zAuxExt);
void testRestoreDb(const char *zFile, const char *zAuxExt);
void testCopyLsmdb(const char *zFrom, const char *zTo);

/* lsmtest7.c */
void test_api(const char *zPattern, int *pRc);

/* lsmtest8.c */
void do_writer_crash_test(const char *zPattern, int *pRc);

/*************************************************************************
** Interface to functionality in test_datasource.c.
*/
typedef struct Datasource Datasource;
typedef struct DatasourceDefn DatasourceDefn;

struct DatasourceDefn {
  int eType;                      /* A TEST_DATASOURCE_* value */
  int nMinKey;                    /* Minimum key size */
  int nMaxKey;                    /* Maximum key size */
  int nMinVal;                    /* Minimum value size */
  int nMaxVal;                    /* Maximum value size */
};

#define TEST_DATASOURCE_RANDOM    1
#define TEST_DATASOURCE_SEQUENCE  2

char *testDatasourceName(const DatasourceDefn *);
Datasource *testDatasourceNew(const DatasourceDefn *);
void testDatasourceFree(Datasource *);
void testDatasourceEntry(Datasource *, int, void **, int *, void **, int *);
/* End of test_datasource.c interface.
*************************************************************************/
void testDatasourceFetch(
  TestDb *pDb,                    /* Database handle */
  Datasource *pData,
  int iKey,
  int *pRc                        /* IN/OUT: Error code */
);

void testWriteDatasource(TestDb *, Datasource *, int, int *);
void testWriteDatasourceRange(TestDb *, Datasource *, int, int, int *);
void testDeleteDatasource(TestDb *, Datasource *, int, int *);
void testDeleteDatasourceRange(TestDb *, Datasource *, int, int, int *);


/* test1.c */
void test_data_1(const char *, const char *, int *pRc);
void test_data_2(const char *, const char *, int *pRc);
void test_data_3(const char *, const char *, int *pRc);
void testDbContents(TestDb *, Datasource *, int, int, int, int, int, int *);
void testCaseProgress(int, int, int, int *);
int testCaseNDot(void);

void testCompareDb(Datasource *, int, int, TestDb *, TestDb *, int *);
int testControlDb(TestDb **ppDb);

typedef struct CksumDb CksumDb;
CksumDb *testCksumArrayNew(Datasource *, int, int, int);
char *testCksumArrayGet(CksumDb *, int);
void testCksumArrayFree(CksumDb *);
void testCaseStart(int *pRc, char *zFmt, ...);
void testCaseFinish(int rc);
void testCaseSkip(void);
int testCaseBegin(int *, const char *, const char *, ...);

#define TEST_CKSUM_BYTES 29
int testCksumDatabase(TestDb *pDb, char *zOut);
int testCountDatabase(TestDb *pDb);
void testCompareInt(int, int, int *);
void testCompareStr(const char *z1, const char *z2, int *pRc);

/* lsmtest9.c */
void test_data_4(const char *, const char *, int *pRc);


/*
** Similar to the Tcl_GetIndexFromObjStruct() Tcl library function.
*/
#define testArgSelect(w,x,y,z) testArgSelectX(w,x,sizeof(w[0]),y,z)
int testArgSelectX(void *, const char *, int, const char *, int *);

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

#endif

Added ext/lsm1/lsm-test/lsmtest1.c.





























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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#include "lsmtest.h"

#define DATA_SEQUENTIAL TEST_DATASOURCE_SEQUENCE
#define DATA_RANDOM     TEST_DATASOURCE_RANDOM

typedef struct Datatest1 Datatest1;
typedef struct Datatest2 Datatest2;

/*
** An instance of the following structure contains parameters used to
** customize the test function in this file. Test procedure:
**
**   1. Create a data-source based on the "datasource definition" vars.
**
**   2. Insert nRow key value pairs into the database.
**
**   3. Delete all keys from the database. Deletes are done in the same 
**      order as the inserts.
**
** During steps 2 and 3 above, after each Datatest1.nVerify inserts or
** deletes, the following:
**
**   a. Run Datasource.nTest key lookups and check the results are as expected.
**
**   b. If Datasource.bTestScan is true, run a handful (8) of range
**      queries (scanning forwards and backwards). Check that the results
**      are as expected.
**
**   c. Close and reopen the database. Then run (a) and (b) again.
*/
struct Datatest1 {
  /* Datasource definition */
  DatasourceDefn defn;

  /* Test procedure parameters */
  int nRow;                       /* Number of rows to insert then delete */
  int nVerify;                    /* How often to verify the db contents */
  int nTest;                      /* Number of keys to test (0==all) */
  int bTestScan;                  /* True to do scan tests */
};

/*
** An instance of the following data structure is used to describe the
** second type of test case in this file. The chief difference between 
** these tests and those described by Datatest1 is that these tests also
** experiment with range-delete operations. Tests proceed as follows:
**
**     1. Open the datasource described by Datatest2.defn. 
**
**     2. Open a connection on an empty database.
**
**     3. Do this Datatest2.nIter times:
**
**        a) Insert Datatest2.nWrite key-value pairs from the datasource.
**
**        b) Select two pseudo-random keys and use them as the start
**           and end points of a range-delete operation.
**
**        c) Verify that the contents of the database are as expected (see
**           below for details).
**
**        d) Close and then reopen the database handle.
**
**        e) Verify that the contents of the database are still as expected.
**
** The inserts and range deletes are run twice - once on the database being
** tested and once using a control system (sqlite3, kc etc. - something that 
** works). In order to verify that the contents of the db being tested are
** correct, the test runs a bunch of scans and lookups on both the test and
** control databases. If the results are the same, the test passes.
*/
struct Datatest2 {
  DatasourceDefn defn;
  int nRange;
  int nWrite;                     /* Number of writes per iteration */
  int nIter;                      /* Total number of iterations to run */
};

/*
** Generate a unique name for the test case pTest with database system
** zSystem.
*/
static char *getName(const char *zSystem, int bRecover, Datatest1 *pTest){
  char *zRet;
  char *zData;
  zData = testDatasourceName(&pTest->defn);
  zRet = testMallocPrintf("data.%s.%s.rec=%d.%d.%d", 
      zSystem, zData, bRecover, pTest->nRow, pTest->nVerify
  );
  testFree(zData);
  return zRet;
}

int testControlDb(TestDb **ppDb){
#ifdef HAVE_KYOTOCABINET
  return tdb_open("kyotocabinet", "tmp.db", 1, ppDb);
#else
  return tdb_open("sqlite3", "", 1, ppDb);
#endif
}

void testDatasourceFetch(
  TestDb *pDb,                    /* Database handle */
  Datasource *pData,
  int iKey,
  int *pRc                        /* IN/OUT: Error code */
){
  void *pKey; int nKey;           /* Database key to query for */
  void *pVal; int nVal;           /* Expected result of query */

  testDatasourceEntry(pData, iKey, &pKey, &nKey, &pVal, &nVal);
  testFetch(pDb, pKey, nKey, pVal, nVal, pRc);
}

/*
** This function is called to test that the contents of database pDb
** are as expected. In this case, expected is defined as containing
** key-value pairs iFirst through iLast, inclusive, from data source 
** pData. In other words, a loop like the following could be used to
** construct a database with identical contents from scratch.
**
**   for(i=iFirst; i<=iLast; i++){
**     testDatasourceEntry(pData, i, &pKey, &nKey, &pVal, &nVal);
**     // insert (pKey, nKey) -> (pVal, nVal) into database
**   }
**
** The key domain consists of keys 0 to (nRow-1), inclusive, from
** data source pData. For both scan and lookup tests, keys are selected
** pseudo-randomly from within this set.
**
** This function runs nLookupTest lookup tests and nScanTest scan tests.
**
** A lookup test consists of selecting a key from the domain and querying
** pDb for it. The test fails if the presence of the key and, if present,
** the associated value do not match the expectations defined above.
**
** A scan test involves selecting a key from the domain and running
** the following queries:
**
**   1. Scan all keys equal to or greater than the key, in ascending order.
**   2. Scan all keys equal to or smaller than the key, in descending order.
**
** Additionally, if nLookupTest is greater than zero, the following are
** run once:
**
**   1. Scan all keys in the db, in ascending order.
**   2. Scan all keys in the db, in descending order.
**
** As you would assume, the test fails if the returned values do not match
** expectations.
*/
void testDbContents(
  TestDb *pDb,                    /* Database handle being tested */
  Datasource *pData,              /* pDb contains data from here */
  int nRow,                       /* Size of key domain */
  int iFirst,                     /* Index of first key from pData in pDb */
  int iLast,                      /* Index of last key from pData in pDb */
  int nLookupTest,                /* Number of lookup tests to run */
  int nScanTest,                  /* Number of scan tests to run */
  int *pRc                        /* IN/OUT: Error code */
){
  int j;
  int rc = *pRc;

  if( rc==0 && nScanTest ){
    TestDb *pDb2 = 0;

    /* Open a control db (i.e. one that we assume works) */
    rc = testControlDb(&pDb2);

    for(j=iFirst; rc==0 && j<=iLast; j++){
      void *pKey; int nKey;         /* Database key to insert */
      void *pVal; int nVal;         /* Database value to insert */
      testDatasourceEntry(pData, j, &pKey, &nKey, &pVal, &nVal);
      rc = tdb_write(pDb2, pKey, nKey, pVal, nVal);
    }

    if( rc==0 ){
      int iKey1;
      int iKey2;
      void *pKey1; int nKey1;       /* Start key */
      void *pKey2; int nKey2;       /* Final key */

      iKey1 = testPrngValue((iFirst<<8) + (iLast<<16)) % nRow;
      iKey2 = testPrngValue((iLast<<8) + (iFirst<<16)) % nRow;
      testDatasourceEntry(pData, iKey1, &pKey2, &nKey1, 0, 0);
      pKey1 = testMalloc(nKey1+1);
      memcpy(pKey1, pKey2, nKey1+1);
      testDatasourceEntry(pData, iKey2, &pKey2, &nKey2, 0, 0);

      testScanCompare(pDb2, pDb, 0, 0, 0,         0, 0,         &rc);
      testScanCompare(pDb2, pDb, 0, 0, 0,         pKey2, nKey2, &rc);
      testScanCompare(pDb2, pDb, 0, pKey1, nKey1, 0, 0,         &rc);
      testScanCompare(pDb2, pDb, 0, pKey1, nKey1, pKey2, nKey2, &rc);
      testScanCompare(pDb2, pDb, 1, 0, 0,         0, 0,         &rc);
      testScanCompare(pDb2, pDb, 1, 0, 0,         pKey2, nKey2, &rc);
      testScanCompare(pDb2, pDb, 1, pKey1, nKey1, 0, 0,         &rc);
      testScanCompare(pDb2, pDb, 1, pKey1, nKey1, pKey2, nKey2, &rc);
      testFree(pKey1);
    }
    tdb_close(pDb2);
  }

  /* Test some lookups. */
  for(j=0; rc==0 && j<nLookupTest; j++){
    int iKey;                     /* Datasource key to test */
    void *pKey; int nKey;         /* Database key to query for */
    void *pVal; int nVal;         /* Expected result of query */

    if( nLookupTest>=nRow ){
      iKey = j;
    }else{
      iKey = testPrngValue(j + (iFirst<<8) + (iLast<<16)) % nRow;
    }

    testDatasourceEntry(pData, iKey, &pKey, &nKey, &pVal, &nVal);
    if( iFirst>iKey || iKey>iLast ){
      pVal = 0;
      nVal = -1;
    }

    testFetch(pDb, pKey, nKey, pVal, nVal, &rc);
  }

  *pRc = rc;
}

/*
** This function should be called during long running test cases to output
** the progress dots (...) to stdout.
*/
void testCaseProgress(int i, int n, int nDot, int *piDot){
  int iDot = *piDot;
  while( iDot < ( ((nDot*2+1) * i) / (n*2) ) ){
    printf(".");
    fflush(stdout);
    iDot++;
  }
  *piDot = iDot;
}

int testCaseNDot(void){ return 20; }

#if 0
static void printScanCb(
    void *pCtx, void *pKey, int nKey, void *pVal, int nVal
){
  printf("%s\n", (char *)pKey);
  fflush(stdout);
}
#endif

void testReopenRecover(TestDb **ppDb, int *pRc){
  if( *pRc==0 ){
    const char *zLib = tdb_library_name(*ppDb);
    const char *zDflt = tdb_default_db(zLib);
    testCopyLsmdb(zDflt, "bak.db");
    testClose(ppDb);
    testCopyLsmdb("bak.db", zDflt);
    *pRc = tdb_open(zLib, 0, 0, ppDb);
  }
}


static void doDataTest1(
  const char *zSystem,            /* Database system to test */
  int bRecover,
  Datatest1 *p,                   /* Structure containing test parameters */
  int *pRc                        /* OUT: Error code */
){
  int i;
  int iDot;
  int rc = LSM_OK;
  Datasource *pData;
  TestDb *pDb;

  /* Start the test case, open a database and allocate the datasource. */
  pDb = testOpen(zSystem, 1, &rc);
  pData = testDatasourceNew(&p->defn);

  i = 0;
  iDot = 0;
  while( rc==LSM_OK && i<p->nRow ){

    /* Insert some data */
    testWriteDatasourceRange(pDb, pData, i, p->nVerify, &rc);
    i += p->nVerify;

    /* Check that the db content is correct. */
    testDbContents(pDb, pData, p->nRow, 0, i-1, p->nTest, p->bTestScan, &rc);

    if( bRecover ){
      testReopenRecover(&pDb, &rc);
    }else{
      testReopen(&pDb, &rc);
    }

    /* Check that the db content is still correct. */
    testDbContents(pDb, pData, p->nRow, 0, i-1, p->nTest, p->bTestScan, &rc);

    /* Update the progress dots... */
    testCaseProgress(i, p->nRow, testCaseNDot()/2, &iDot);
  }

  i = 0;
  iDot = 0;
  while( rc==LSM_OK && i<p->nRow ){

    /* Delete some entries */
    testDeleteDatasourceRange(pDb, pData, i, p->nVerify, &rc);
    i += p->nVerify;

    /* Check that the db content is correct. */
    testDbContents(pDb, pData, p->nRow, i, p->nRow-1,p->nTest,p->bTestScan,&rc);

    /* Close and reopen the database. */
    if( bRecover ){
      testReopenRecover(&pDb, &rc);
    }else{
      testReopen(&pDb, &rc);
    }

    /* Check that the db content is still correct. */
    testDbContents(pDb, pData, p->nRow, i, p->nRow-1,p->nTest,p->bTestScan,&rc);

    /* Update the progress dots... */
    testCaseProgress(i, p->nRow, testCaseNDot()/2, &iDot);
  }

  /* Free the datasource, close the database and finish the test case. */
  testDatasourceFree(pData);
  tdb_close(pDb);
  testCaseFinish(rc);
  *pRc = rc;
}


void test_data_1(
  const char *zSystem,            /* Database system name */
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  Datatest1 aTest[] = {
    { {DATA_RANDOM,     500,600,   1000,2000},     1000,  100,  10,  0},
    { {DATA_RANDOM,     20,25,     100,200},       1000,  250, 1000, 1},
    { {DATA_RANDOM,     8,10,      100,200},       1000,  250, 1000, 1},
    { {DATA_RANDOM,     8,10,      10,20},         1000,  250, 1000, 1},
    { {DATA_RANDOM,     8,10,      1000,2000},     1000,  250, 1000, 1},
    { {DATA_RANDOM,     8,100,     10000,20000},    100,   25,  100, 1},
    { {DATA_RANDOM,     80,100,    10,20},         1000,  250, 1000, 1},
    { {DATA_RANDOM,     5000,6000, 10,20},          100,   25,  100, 1},
    { {DATA_SEQUENTIAL, 5,10,      10,20},         1000,  250, 1000, 1},
    { {DATA_SEQUENTIAL, 5,10,      100,200},       1000,  250, 1000, 1},
    { {DATA_SEQUENTIAL, 5,10,      1000,2000},     1000,  250, 1000, 1},
    { {DATA_SEQUENTIAL, 5,100,     10000,20000},    100,   25,  100, 1},
    { {DATA_RANDOM,     10,10,     100,100},     100000, 1000,  100, 0},
    { {DATA_SEQUENTIAL, 10,10,     100,100},     100000, 1000,  100, 0},
  };

  int i;
  int bRecover;

  for(bRecover=0; bRecover<2; bRecover++){
    if( bRecover==1 && memcmp(zSystem, "lsm", 3) ) break;
    for(i=0; *pRc==LSM_OK && i<ArraySize(aTest); i++){
      char *zName = getName(zSystem, bRecover, &aTest[i]);
      if( testCaseBegin(pRc, zPattern, "%s", zName) ){
        doDataTest1(zSystem, bRecover, &aTest[i], pRc);
      }
      testFree(zName);
    }
  }
}

void testCompareDb(
  Datasource *pData,
  int nData,
  int iSeed,
  TestDb *pControl,
  TestDb *pDb,
  int *pRc
){
  int i;

  static int nCall = 0;
  nCall++;

  testScanCompare(pControl, pDb, 0, 0, 0,         0, 0,         pRc);
  testScanCompare(pControl, pDb, 1, 0, 0,         0, 0,         pRc);

  if( *pRc==0 ){
    int iKey1;
    int iKey2;
    void *pKey1; int nKey1;       /* Start key */
    void *pKey2; int nKey2;       /* Final key */

    iKey1 = testPrngValue(iSeed) % nData;
    iKey2 = testPrngValue(iSeed+1) % nData;
    testDatasourceEntry(pData, iKey1, &pKey2, &nKey1, 0, 0);
    pKey1 = testMalloc(nKey1+1);
    memcpy(pKey1, pKey2, nKey1+1);
    testDatasourceEntry(pData, iKey2, &pKey2, &nKey2, 0, 0);

    testScanCompare(pControl, pDb, 0, 0, 0,         pKey2, nKey2, pRc);
    testScanCompare(pControl, pDb, 0, pKey1, nKey1, 0, 0,         pRc);
    testScanCompare(pControl, pDb, 0, pKey1, nKey1, pKey2, nKey2, pRc);
    testScanCompare(pControl, pDb, 1, 0, 0,         pKey2, nKey2, pRc);
    testScanCompare(pControl, pDb, 1, pKey1, nKey1, 0, 0,         pRc);
    testScanCompare(pControl, pDb, 1, pKey1, nKey1, pKey2, nKey2, pRc);
    testFree(pKey1);
  }

  for(i=0; i<nData && *pRc==0; i++){
    void *pKey; int nKey;
    testDatasourceEntry(pData, i, &pKey, &nKey, 0, 0);
    testFetchCompare(pControl, pDb, pKey, nKey, pRc);
  }
}

static void doDataTest2(
  const char *zSystem,            /* Database system to test */
  int bRecover,
  Datatest2 *p,                   /* Structure containing test parameters */
  int *pRc                        /* OUT: Error code */
){
  TestDb *pDb;
  TestDb *pControl;
  Datasource *pData;
  int i;
  int rc = LSM_OK;
  int iDot = 0;

  /* Start the test case, open a database and allocate the datasource. */
  pDb = testOpen(zSystem, 1, &rc);
  pData = testDatasourceNew(&p->defn);
  rc = testControlDb(&pControl);

  if( tdb_lsm(pDb) ){
    int nBuf = 32 * 1024 * 1024;
    lsm_config(tdb_lsm(pDb), LSM_CONFIG_AUTOFLUSH, &nBuf);
  }

  for(i=0; rc==0 && i<p->nIter; i++){
    void *pKey1; int nKey1;
    void *pKey2; int nKey2;
    int ii;
    int nRange = MIN(p->nIter*p->nWrite, p->nRange);

    for(ii=0; rc==0 && ii<p->nWrite; ii++){
      int iKey = (i*p->nWrite + ii) % p->nRange;
      testWriteDatasource(pControl, pData, iKey, &rc);
      testWriteDatasource(pDb, pData, iKey, &rc);
    }

    testDatasourceEntry(pData, i+1000000, &pKey1, &nKey1, 0, 0);
    pKey1 = testMallocCopy(pKey1, nKey1);
    testDatasourceEntry(pData, i+2000000, &pKey2, &nKey2, 0, 0);

    testDeleteRange(pDb, pKey1, nKey1, pKey2, nKey2, &rc);
    testDeleteRange(pControl, pKey1, nKey1, pKey2, nKey2, &rc);
    testFree(pKey1);

    testCompareDb(pData, nRange, i, pControl, pDb, &rc);
    if( bRecover ){
      testReopenRecover(&pDb, &rc);
    }else{
      testReopen(&pDb, &rc);
    }
    testCompareDb(pData, nRange, i, pControl, pDb, &rc);

    /* Update the progress dots... */
    testCaseProgress(i, p->nIter, testCaseNDot(), &iDot);
  }

  testClose(&pDb);
  testClose(&pControl);
  testDatasourceFree(pData);
  testCaseFinish(rc);
  *pRc = rc;
}

static char *getName2(const char *zSystem, int bRecover, Datatest2 *pTest){
  char *zRet;
  char *zData;
  zData = testDatasourceName(&pTest->defn);
  zRet = testMallocPrintf("data2.%s.%s.rec=%d.%d.%d.%d", 
      zSystem, zData, bRecover, pTest->nRange, pTest->nWrite, pTest->nIter
  );
  testFree(zData);
  return zRet;
}

void test_data_2(
  const char *zSystem,            /* Database system name */
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  Datatest2 aTest[] = {
      /* defn,                                 nRange, nWrite, nIter */
    { {DATA_RANDOM,     20,25,     100,200},   10000,  10,     50   },
    { {DATA_RANDOM,     20,25,     100,200},   10000,  200,    50   },
    { {DATA_RANDOM,     20,25,     100,200},   100,    10,     1000 },
    { {DATA_RANDOM,     20,25,     100,200},   100,    200,    50   },
  };

  int i;
  int bRecover;

  for(bRecover=0; bRecover<2; bRecover++){
    if( bRecover==1 && memcmp(zSystem, "lsm", 3) ) break;
    for(i=0; *pRc==LSM_OK && i<ArraySize(aTest); i++){
      char *zName = getName2(zSystem, bRecover, &aTest[i]);
      if( testCaseBegin(pRc, zPattern, "%s", zName) ){
        doDataTest2(zSystem, bRecover, &aTest[i], pRc);
      }
      testFree(zName);
    }
  }
}

/*************************************************************************
** Test case data3.*
*/

typedef struct Datatest3 Datatest3;
struct Datatest3 {
  int nRange;                     /* Keys are between 1 and this value, incl. */
  int nIter;                      /* Number of iterations */
  int nWrite;                     /* Number of writes per iteration */
  int nDelete;                    /* Number of deletes per iteration */

  int nValMin;                    /* Minimum value size for writes */
  int nValMax;                    /* Maximum value size for writes */
};

void testPutU32(u8 *aBuf, u32 iVal){
  aBuf[0] = (iVal >> 24) & 0xFF;
  aBuf[1] = (iVal >> 16) & 0xFF;
  aBuf[2] = (iVal >>  8) & 0xFF;
  aBuf[3] = (iVal >>  0) & 0xFF;
}

void dt3PutKey(u8 *aBuf, int iKey){
  assert( iKey<100000 && iKey>=0 );
  sprintf((char *)aBuf, "%.5d", iKey);
}

static void doDataTest3(
  const char *zSystem,            /* Database system to test */
  Datatest3 *p,                   /* Structure containing test parameters */
  int *pRc                        /* OUT: Error code */
){
  int iDot = 0;
  int rc = *pRc;
  TestDb *pDb;
  u8 *abPresent;                  /* Array of boolean */
  char *aVal;                     /* Buffer to hold values */
  int i;
  u32 iSeq = 10;                  /* prng counter */

  abPresent = (u8 *)testMalloc(p->nRange+1);
  aVal = (char *)testMalloc(p->nValMax+1);
  pDb = testOpen(zSystem, 1, &rc);

  for(i=0; i<p->nIter && rc==0; i++){
    int ii;

    testCaseProgress(i, p->nIter, testCaseNDot(), &iDot);

    /* Perform nWrite inserts */
    for(ii=0; ii<p->nWrite; ii++){
      u8 aKey[6];
      u32 iKey;
      int nVal;

      iKey = (testPrngValue(iSeq++) % p->nRange) + 1;
      nVal = (testPrngValue(iSeq++) % (p->nValMax - p->nValMin)) + p->nValMin;
      testPrngString(testPrngValue(iSeq++), aVal, nVal);
      dt3PutKey(aKey, iKey);

      testWrite(pDb, aKey, sizeof(aKey)-1, aVal, nVal, &rc);
      abPresent[iKey] = 1;
    }

    /* Perform nDelete deletes */
    for(ii=0; ii<p->nDelete; ii++){
      u8 aKey1[6];
      u8 aKey2[6];
      u32 iKey;

      iKey = (testPrngValue(iSeq++) % p->nRange) + 1;
      dt3PutKey(aKey1, iKey-1);
      dt3PutKey(aKey2, iKey+1);

      testDeleteRange(pDb, aKey1, sizeof(aKey1)-1, aKey2, sizeof(aKey2)-1, &rc);
      abPresent[iKey] = 0;
    }

    testReopen(&pDb, &rc);

    for(ii=1; rc==0 && ii<=p->nRange; ii++){
      int nDbVal;
      void *pDbVal;
      u8 aKey[6];
      int dbrc;

      dt3PutKey(aKey, ii);
      dbrc = tdb_fetch(pDb, aKey, sizeof(aKey)-1, &pDbVal, &nDbVal);
      testCompareInt(0, dbrc, &rc);

      if( abPresent[ii] ){
        testCompareInt(1, (nDbVal>0), &rc);
      }else{
        testCompareInt(1, (nDbVal<0), &rc);
      }
    }
  }

  testClose(&pDb);
  testCaseFinish(rc);
  *pRc = rc;
}

static char *getName3(const char *zSystem, Datatest3 *p){
  return testMallocPrintf("data3.%s.%d.%d.%d.%d.(%d..%d)",
      zSystem, p->nRange, p->nIter, p->nWrite, p->nDelete, 
      p->nValMin, p->nValMax
  );
}

void test_data_3(
  const char *zSystem,            /* Database system name */
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  Datatest3 aTest[] = {
    /* nRange, nIter, nWrite, nDelete, nValMin, nValMax */
    {  100,    1000,  5,      5,       50,      100 },
    {  100,    1000,  2,      2,        5,       10 },
  };

  int i;

  for(i=0; *pRc==LSM_OK && i<ArraySize(aTest); i++){
    char *zName = getName3(zSystem, &aTest[i]);
    if( testCaseBegin(pRc, zPattern, "%s", zName) ){
      doDataTest3(zSystem, &aTest[i], pRc);
    }
    testFree(zName);
  }
}


Added ext/lsm1/lsm-test/lsmtest2.c.

















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
** This file contains tests related to recovery following application 
** and system crashes (power failures) while writing to the database.
*/

#include "lsmtest.h"

/*
** Structure used by testCksumDatabase() to accumulate checksum values in.
*/
typedef struct Cksum Cksum;
struct Cksum {
  int nRow;
  int cksum1;
  int cksum2;
};

/*
** tdb_scan() callback used by testCksumDatabase()
*/
static void scanCksumDb(
  void *pCtx, 
  void *pKey, int nKey,
  void *pVal, int nVal
){
  Cksum *p = (Cksum *)pCtx;
  int i;

  p->nRow++;
  for(i=0; i<nKey; i++){
    p->cksum1 += ((u8 *)pKey)[i];
    p->cksum2 += p->cksum1;
  }
  for(i=0; i<nVal; i++){
    p->cksum1 += ((u8 *)pVal)[i];
    p->cksum2 += p->cksum1;
  }
}

/*
** tdb_scan() callback used by testCountDatabase()
*/
static void scanCountDb(
  void *pCtx, 
  void *pKey, int nKey,
  void *pVal, int nVal
){
  Cksum *p = (Cksum *)pCtx;
  p->nRow++;

  unused_parameter(pKey);
  unused_parameter(nKey);
  unused_parameter(pVal);
  unused_parameter(nVal);
}


/*
** Iterate through the entire contents of database pDb. Write a checksum
** string based on the db contents into buffer zOut before returning. A
** checksum string is at most 29 (TEST_CKSUM_BYTES) bytes in size:
**
**    * 32-bit integer (10 bytes)
**    * 1 space        (1 byte)
**    * 32-bit hex     (8 bytes)
**    * 1 space        (1 byte)
**    * 32-bit hex     (8 bytes)
**    * nul-terminator (1 byte)
**
** The number of entries in the database is returned.
*/
int testCksumDatabase(
  TestDb *pDb,                    /* Database handle */
  char *zOut                      /* Buffer to write checksum to */
){
  Cksum cksum;
  memset(&cksum, 0, sizeof(Cksum));
  tdb_scan(pDb, (void *)&cksum, 0, 0, 0, 0, 0, scanCksumDb);
  sprintf(zOut, "%d %x %x", 
      cksum.nRow, (u32)cksum.cksum1, (u32)cksum.cksum2
  );
  assert( strlen(zOut)<TEST_CKSUM_BYTES );
  return cksum.nRow;
}

int testCountDatabase(TestDb *pDb){
  Cksum cksum;
  memset(&cksum, 0, sizeof(Cksum));
  tdb_scan(pDb, (void *)&cksum, 0, 0, 0, 0, 0, scanCountDb);
  return cksum.nRow;
}

/*
** This function is a no-op if *pRc is not 0 when it is called.
**
** Otherwise, the two nul-terminated strings z1 and z1 are compared. If
** they are the same, the function returns without doing anything. Otherwise,
** an error message is printed, *pRc is set to 1 and the test_failed()
** function called.
*/
void testCompareStr(const char *z1, const char *z2, int *pRc){
  if( *pRc==0 ){
    if( strcmp(z1, z2) ){
      testPrintError("testCompareStr: \"%s\" != \"%s\"\n", z1, z2);
      *pRc = 1;
      test_failed();
    }
  }
}

/*
** This function is a no-op if *pRc is not 0 when it is called.
**
** Otherwise, the two integers i1 and i2 are compared. If they are equal,
** the function returns without doing anything. Otherwise, an error message 
** is printed, *pRc is set to 1 and the test_failed() function called.
*/
void testCompareInt(int i1, int i2, int *pRc){
  if( *pRc==0 && i1!=i2 ){
    testPrintError("testCompareInt: %d != %d\n", i1, i2);
    *pRc = 1;
    test_failed();
  }
}

void testCaseStart(int *pRc, char *zFmt, ...){
  va_list ap;
  va_start(ap, zFmt);
  vprintf(zFmt, ap);
  printf(" ...");
  va_end(ap);
  *pRc = 0;
  fflush(stdout);
}

/*
** This function is a no-op if *pRc is non-zero when it is called. Zero
** is returned in this case.
**
** Otherwise, the zFmt (a printf style format string) and following arguments 
** are used to create a test case name. If zPattern is NULL or a glob pattern
** that matches the test case name, 1 is returned and the test case started.
** Otherwise, zero is returned and the test case does not start.
*/
int testCaseBegin(int *pRc, const char *zPattern, const char *zFmt, ...){
  int res = 0;
  if( *pRc==0 ){
    char *zTest;
    va_list ap;

    va_start(ap, zFmt);
    zTest = testMallocVPrintf(zFmt, ap);
    va_end(ap);
    if( zPattern==0 || testGlobMatch(zPattern, zTest) ){
      printf("%-50s ...", zTest);
      res = 1;
    }
    testFree(zTest);
    fflush(stdout);
  }

  return res;
}

void testCaseFinish(int rc){
  if( rc==0 ){
    printf("Ok\n");
  }else{
    printf("FAILED\n");
  }
  fflush(stdout);
}

void testCaseSkip(){
  printf("Skipped\n");
}

void testSetupSavedLsmdb(
  const char *zCfg,
  const char *zFile,
  Datasource *pData,
  int nRow,
  int *pRc
){
  if( *pRc==0 ){
    int rc;
    TestDb *pDb;
    rc = tdb_lsm_open(zCfg, zFile, 1, &pDb);
    if( rc==0 ){
      testWriteDatasourceRange(pDb, pData, 0, nRow, &rc);
      testClose(&pDb);
      if( rc==0 ) testSaveDb(zFile, "log");
    }
    *pRc = rc;
  }
}

/*
** This function is a no-op if *pRc is non-zero when it is called.
**
** Open the LSM database identified by zFile and compute its checksum
** (a string, as returned by testCksumDatabase()). If the checksum is
** identical to zExpect1 or, if it is not NULL, zExpect2, the test passes.
** Otherwise, print an error message and set *pRc to 1.
*/
static void testCompareCksumLsmdb(
  const char *zFile,              /* Path to LSM database */
  int bCompress,                  /* True if db is compressed */
  const char *zExpect1,           /* Expected checksum 1 */
  const char *zExpect2,           /* Expected checksum 2 (or NULL) */
  int *pRc                        /* IN/OUT: Test case error code */
){
  if( *pRc==0 ){
    char zCksum[TEST_CKSUM_BYTES];
    TestDb *pDb;

    *pRc = tdb_lsm_open((bCompress?"compression=1 mmap=0":""), zFile, 0, &pDb);
    testCksumDatabase(pDb, zCksum);
    testClose(&pDb);

    if( *pRc==0 ){
      int r1 = 0;
      int r2 = -1;

      r1 = strcmp(zCksum, zExpect1);
      if( zExpect2 ) r2 = strcmp(zCksum, zExpect2);
      if( r1 && r2 ){
        if( zExpect2 ){
          testPrintError("testCompareCksumLsmdb: \"%s\" != (\"%s\" OR \"%s\")",
              zCksum, zExpect1, zExpect2
          );
        }else{
          testPrintError("testCompareCksumLsmdb: \"%s\" != \"%s\"",
              zCksum, zExpect1
          );
        }
        *pRc = 1;
        test_failed();
      }
    }
  }
}

#if 0 /* not used */
static void testCompareCksumBtdb(
  const char *zFile,              /* Path to LSM database */
  const char *zExpect1,           /* Expected checksum 1 */
  const char *zExpect2,           /* Expected checksum 2 (or NULL) */
  int *pRc                        /* IN/OUT: Test case error code */
){
  if( *pRc==0 ){
    char zCksum[TEST_CKSUM_BYTES];
    TestDb *pDb;

    *pRc = tdb_open("bt", zFile, 0, &pDb);
    testCksumDatabase(pDb, zCksum);
    testClose(&pDb);

    if( *pRc==0 ){
      int r1 = 0;
      int r2 = -1;

      r1 = strcmp(zCksum, zExpect1);
      if( zExpect2 ) r2 = strcmp(zCksum, zExpect2);
      if( r1 && r2 ){
        if( zExpect2 ){
          testPrintError("testCompareCksumLsmdb: \"%s\" != (\"%s\" OR \"%s\")",
              zCksum, zExpect1, zExpect2
          );
        }else{
          testPrintError("testCompareCksumLsmdb: \"%s\" != \"%s\"",
              zCksum, zExpect1
          );
        }
        *pRc = 1;
        test_failed();
      }
    }
  }
}
#endif /* not used */

/* Above this point are reusable test routines. Not clear that they
** should really be in this file.
*************************************************************************/

/*
** This test verifies that if a system crash occurs while doing merge work
** on the db, no data is lost.
*/
static void crash_test1(int bCompress, int *pRc){
  const char *DBNAME = "testdb.lsm";
  const DatasourceDefn defn = {TEST_DATASOURCE_RANDOM, 12, 16, 200, 200};

  const int nRow = 5000;          /* Database size */
  const int nIter = 200;          /* Number of test iterations */
  const int nWork = 20;           /* Maximum lsm_work() calls per iteration */
  const int nPage = 15;           /* Pages per lsm_work call */

  int i;
  int iDot = 0;
  Datasource *pData;
  CksumDb *pCksumDb;
  TestDb *pDb;
  char *zCfg;

  const char *azConfig[2] = {
    "page_size=1024 block_size=65536 autoflush=16384 safety=2 mmap=0", 
    "page_size=1024 block_size=65536 autoflush=16384 safety=2 "
    " compression=1 mmap=0"
  };
  assert( bCompress==0 || bCompress==1 );

  /* Allocate datasource. And calculate the expected checksums. */
  pData = testDatasourceNew(&defn);
  pCksumDb = testCksumArrayNew(pData, nRow, nRow, 1);

  /* Setup and save the initial database. */

  zCfg = testMallocPrintf("%s automerge=7", azConfig[bCompress]);
  testSetupSavedLsmdb(zCfg, DBNAME, pData, 5000, pRc);
  testFree(zCfg);

  for(i=0; i<nIter && *pRc==0; i++){
    int iWork;
    int testrc = 0;

    testCaseProgress(i, nIter, testCaseNDot(), &iDot);

    /* Restore and open the database. */
    testRestoreDb(DBNAME, "log");
    testrc = tdb_lsm_open(azConfig[bCompress], DBNAME, 0, &pDb);
    assert( testrc==0 );

    /* Call lsm_work() on the db */
    tdb_lsm_prepare_sync_crash(pDb, 1 + (i%(nWork*2)));
    for(iWork=0; testrc==0 && iWork<nWork; iWork++){
      int nWrite = 0;
      lsm_db *db = tdb_lsm(pDb);
      testrc = lsm_work(db, 0, nPage, &nWrite);
      /* assert( testrc!=0 || nWrite>0 ); */
      if( testrc==0 ) testrc = lsm_checkpoint(db, 0);
    }
    tdb_close(pDb);

    /* Check that the database content is still correct */
    testCompareCksumLsmdb(DBNAME, 
        bCompress, testCksumArrayGet(pCksumDb, nRow), 0, pRc);
  }

  testCksumArrayFree(pCksumDb);
  testDatasourceFree(pData);
}

/*
** This test verifies that if a system crash occurs while committing a
** transaction to the log file, no earlier transactions are lost or damaged.
*/
static void crash_test2(int bCompress, int *pRc){
  const char *DBNAME = "testdb.lsm";
  const DatasourceDefn defn = {TEST_DATASOURCE_RANDOM, 12, 16, 1000, 1000};

  const int nIter = 200;
  const int nInsert = 20;

  int i;
  int iDot = 0;
  Datasource *pData;
  CksumDb *pCksumDb;
  TestDb *pDb;

  /* Allocate datasource. And calculate the expected checksums. */
  pData = testDatasourceNew(&defn);
  pCksumDb = testCksumArrayNew(pData, 100, 100+nInsert, 1);

  /* Setup and save the initial database. */
  testSetupSavedLsmdb("", DBNAME, pData, 100, pRc);

  for(i=0; i<nIter && *pRc==0; i++){
    int iIns;
    int testrc = 0;

    testCaseProgress(i, nIter, testCaseNDot(), &iDot);

    /* Restore and open the database. */
    testRestoreDb(DBNAME, "log");
    testrc = tdb_lsm_open("safety=2", DBNAME, 0, &pDb);
    assert( testrc==0 );

    /* Insert nInsert records into the database. Crash midway through. */
    tdb_lsm_prepare_sync_crash(pDb, 1 + (i%(nInsert+2)));
    for(iIns=0; iIns<nInsert; iIns++){
      void *pKey; int nKey;
      void *pVal; int nVal;

      testDatasourceEntry(pData, 100+iIns, &pKey, &nKey, &pVal, &nVal);
      testrc = tdb_write(pDb, pKey, nKey, pVal, nVal);
      if( testrc ) break;
    }
    tdb_close(pDb);

    /* Check that no data was lost when the system crashed. */
    testCompareCksumLsmdb(DBNAME, bCompress,
      testCksumArrayGet(pCksumDb, 100 + iIns),
      testCksumArrayGet(pCksumDb, 100 + iIns + 1),
      pRc
    );
  }

  testDatasourceFree(pData);
  testCksumArrayFree(pCksumDb);
}


/*
** This test verifies that if a system crash occurs when checkpointing
** the database, data is not lost (assuming that any writes not synced
** to the db have been synced into the log file).
*/
static void crash_test3(int bCompress, int *pRc){
  const char *DBNAME = "testdb.lsm";
  const int nIter = 100;
  const DatasourceDefn defn = {TEST_DATASOURCE_RANDOM, 12, 16, 1000, 1000};

  int i;
  int iDot = 0;
  Datasource *pData;
  CksumDb *pCksumDb;
  TestDb *pDb;

  /* Allocate datasource. And calculate the expected checksums. */
  pData = testDatasourceNew(&defn);
  pCksumDb = testCksumArrayNew(pData, 110, 150, 10);

  /* Setup and save the initial database. */
  testSetupSavedLsmdb("", DBNAME, pData, 100, pRc);

  for(i=0; i<nIter && *pRc==0; i++){
    int iOpen;
    testCaseProgress(i, nIter, testCaseNDot(), &iDot);
    testRestoreDb(DBNAME, "log");

    for(iOpen=0; iOpen<5; iOpen++){
      /* Open the database. Insert 10 more records. */
      pDb = testOpen("lsm", 0, pRc);
      testWriteDatasourceRange(pDb, pData, 100+iOpen*10, 10, pRc);

      /* Schedule a crash simulation then close the db. */
      tdb_lsm_prepare_sync_crash(pDb, 1 + (i%2));
      tdb_close(pDb);

      /* Open the database and check that the crash did not cause any
      ** data loss.  */
      testCompareCksumLsmdb(DBNAME, bCompress,
        testCksumArrayGet(pCksumDb, 110 + iOpen*10), 0,
        pRc
      );
    }
  }

  testDatasourceFree(pData);
  testCksumArrayFree(pCksumDb);
}

void do_crash_test(const char *zPattern, int *pRc){
  struct Test {
    const char *zTest;
    void (*x)(int, int *);
    int bCompress;
  } aTest [] = {
    { "crash.lsm.1",     crash_test1, 0 },
#ifdef HAVE_ZLIB
    { "crash.lsm_zip.1", crash_test1, 1 },
#endif
    { "crash.lsm.2",     crash_test2, 0 },
    { "crash.lsm.3",     crash_test3, 0 },
  };
  int i;

  for(i=0; *pRc==LSM_OK && i<ArraySize(aTest); i++){
    struct Test *p = &aTest[i];
    if( testCaseBegin(pRc, zPattern, "%s", p->zTest) ){
      p->x(p->bCompress, pRc);
      testCaseFinish(*pRc);
    }
  }
}

Added ext/lsm1/lsm-test/lsmtest3.c.





























































































































































































































































































































































































































































































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/*
** This file contains tests related to the explicit rollback of database
** transactions and sub-transactions.
*/


/*
** Repeat 2000 times (until the db contains 100,000 entries):
**
**   1. Open a transaction and insert 500 rows, opening a nested 
**      sub-transaction each 100 rows.
**
**   2. Roll back to each sub-transaction savepoint. Check the database
**      checksum looks Ok.
**
**   3. Every second iteration, roll back the main transaction. Check the
**      db checksum is correct. Every other iteration, commit the main
**      transaction (increasing the size of the db by 100 rows).
*/


#include "lsmtest.h"

struct CksumDb {
  int nFirst;
  int nLast;
  int nStep;
  char **azCksum;
};

CksumDb *testCksumArrayNew(
  Datasource *pData, 
  int nFirst, 
  int nLast, 
  int nStep
){
  TestDb *pDb;
  CksumDb *pRet;
  int i;
  int nEntry;
  int rc = 0;

  assert( nLast>=nFirst && ((nLast-nFirst)%nStep)==0 );
 
  pRet = malloc(sizeof(CksumDb));
  memset(pRet, 0, sizeof(CksumDb));
  pRet->nFirst = nFirst;
  pRet->nLast = nLast;
  pRet->nStep = nStep;
  nEntry = 1 + ((nLast - nFirst) / nStep);

  /* Allocate space so that azCksum is an array of nEntry pointers to
  ** buffers each TEST_CKSUM_BYTES in size.  */
  pRet->azCksum = (char **)malloc(nEntry * (sizeof(char *) + TEST_CKSUM_BYTES));
  for(i=0; i<nEntry; i++){
    char *pStart = (char *)(&pRet->azCksum[nEntry]);
    pRet->azCksum[i] = &pStart[i * TEST_CKSUM_BYTES];
  }

  tdb_open("lsm", "tempdb.lsm", 1, &pDb);
  testWriteDatasourceRange(pDb, pData, 0, nFirst, &rc);
  for(i=0; i<nEntry; i++){
    testCksumDatabase(pDb, pRet->azCksum[i]);
    if( i==nEntry ) break;
    testWriteDatasourceRange(pDb, pData, nFirst+i*nStep, nStep, &rc);
  }

  tdb_close(pDb);

  return pRet;
}

char *testCksumArrayGet(CksumDb *p, int nRow){
  int i;
  assert( nRow>=p->nFirst );
  assert( nRow<=p->nLast );
  assert( ((nRow-p->nFirst) % p->nStep)==0 );

  i = (nRow - p->nFirst) / p->nStep;
  return p->azCksum[i];
}

void testCksumArrayFree(CksumDb *p){
  free(p->azCksum);
  memset(p, 0x55, sizeof(*p));
  free(p);
}

/* End of CksumDb code.
**************************************************************************/

/*
** Test utility function. Write key-value pair $i from datasource pData 
** into database pDb.
*/
void testWriteDatasource(TestDb *pDb, Datasource *pData, int i, int *pRc){
  void *pKey; int nKey;
  void *pVal; int nVal;
  testDatasourceEntry(pData, i, &pKey, &nKey, &pVal, &nVal);
  testWrite(pDb, pKey, nKey, pVal, nVal, pRc);
}

/*
** Test utility function. Delete datasource pData key $i from database pDb.
*/
void testDeleteDatasource(TestDb *pDb, Datasource *pData, int i, int *pRc){
  void *pKey; int nKey;
  testDatasourceEntry(pData, i, &pKey, &nKey, 0, 0);
  testDelete(pDb, pKey, nKey, pRc);
}

/*
** This function inserts nWrite key/value pairs into database pDb - the
** nWrite key value pairs starting at iFirst from data source pData.
*/
void testWriteDatasourceRange(
  TestDb *pDb,                    /* Database to write to */
  Datasource *pData,              /* Data source to read values from */
  int iFirst,                     /* Index of first key/value pair */
  int nWrite,                     /* Number of key/value pairs to write */
  int *pRc                        /* IN/OUT: Error code */
){
  int i;
  for(i=0; i<nWrite; i++){
    testWriteDatasource(pDb, pData, iFirst+i, pRc);
  }
}

void testDeleteDatasourceRange(
  TestDb *pDb,                    /* Database to write to */
  Datasource *pData,              /* Data source to read keys from */
  int iFirst,                     /* Index of first key */
  int nWrite,                     /* Number of keys to delete */
  int *pRc                        /* IN/OUT: Error code */
){
  int i;
  for(i=0; i<nWrite; i++){
    testDeleteDatasource(pDb, pData, iFirst+i, pRc);
  }
}

static char *getName(const char *zSystem){ 
  char *zRet; 
  zRet = testMallocPrintf("rollback.%s", zSystem);
  return zRet;
}

static int rollback_test_1(
  const char *zSystem,
  Datasource *pData
){
  const int nRepeat = 100;

  TestDb *pDb;
  int rc;
  int i;
  CksumDb *pCksum;
  char *zName;

  zName = getName(zSystem);
  testCaseStart(&rc, zName);
  testFree(zName);

  pCksum = testCksumArrayNew(pData, 0, nRepeat*100, 100);
  pDb = 0;
  rc = tdb_open(zSystem, 0, 1, &pDb);
  if( pDb && tdb_transaction_support(pDb)==0 ){
    testCaseSkip();
    goto skip_rollback_test;
  }

  for(i=0; i<nRepeat && rc==0; i++){
    char zCksum[TEST_CKSUM_BYTES];
    int nCurrent = (((i+1)/2) * 100);
    int nDbRow;
    int iTrans;

    /* Check that the database is the expected size. */
    nDbRow = testCountDatabase(pDb);
    testCompareInt(nCurrent, nDbRow, &rc);

    for(iTrans=2; iTrans<=6 && rc==0; iTrans++){
      tdb_begin(pDb, iTrans);
      testWriteDatasourceRange(pDb, pData, nCurrent, 100, &rc);
      nCurrent += 100;
    }

    testCksumDatabase(pDb, zCksum);
    testCompareStr(zCksum, testCksumArrayGet(pCksum, nCurrent), &rc);

    for(iTrans=6; iTrans>2 && rc==0; iTrans--){
      tdb_rollback(pDb, iTrans);
      nCurrent -= 100;
      testCksumDatabase(pDb, zCksum);
      testCompareStr(zCksum, testCksumArrayGet(pCksum, nCurrent), &rc);
    }

    if( i%2 ){
      tdb_rollback(pDb, 0);
      nCurrent -= 100;
      testCksumDatabase(pDb, zCksum);
      testCompareStr(zCksum, testCksumArrayGet(pCksum, nCurrent), &rc);
    }else{
      tdb_commit(pDb, 0);
    }
  }
  testCaseFinish(rc);

 skip_rollback_test:
  tdb_close(pDb);
  testCksumArrayFree(pCksum);
  return rc;
}

void test_rollback(
  const char *zSystem, 
  const char *zPattern, 
  int *pRc
){
  if( *pRc==0 ){
    int bRun = 1;

    if( zPattern ){
      char *zName = getName(zSystem);
      bRun = testGlobMatch(zPattern, zName);
      testFree(zName);
    }

    if( bRun ){
      DatasourceDefn defn = { TEST_DATASOURCE_RANDOM, 10, 15, 50, 100 };
      Datasource *pData = testDatasourceNew(&defn);
      *pRc = rollback_test_1(zSystem, pData);
      testDatasourceFree(pData);
    }
  }
}

Added ext/lsm1/lsm-test/lsmtest4.c.































































































































































































































































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/*
** This file contains test cases involving multiple database clients.
*/

#include "lsmtest.h"

/*
** The following code implements test cases "mc1.*".
**
** This test case uses one writer and $nReader readers. All connections
** are driven by a single thread. All connections are opened at the start
** of the test and remain open until the test is finished.
**
** The test consists of $nStep steps. Each step the following is performed:
**
**   1. The writer inserts $nWriteStep records into the db.
**
**   2. The writer checks that the contents of the db are as expected.
**
**   3. Each reader that currently has an open read transaction also checks
**      that the contents of the db are as expected (according to the snapshot
**      the read transaction is reading - see below).
**
** After step 1, reader 1 opens a read transaction. After step 2, reader
** 2 opens a read transaction, and so on. At step ($nReader+1), reader 1
** closes the current read transaction and opens a new one. And so on.
** The result is that at step N (for N > $nReader), there exists a reader
** with an open read transaction reading the snapshot committed following
** steps (N-$nReader-1) to N. 
*/
typedef struct Mctest Mctest;
struct Mctest {
  DatasourceDefn defn;            /* Datasource to use */
  int nStep;                      /* Total number of steps in test */
  int nWriteStep;                 /* Number of rows to insert each step */
  int nReader;                    /* Number of read connections */
};
static void do_mc_test(
  const char *zSystem,            /* Database system to test */
  Mctest *pTest,
  int *pRc                        /* IN/OUT: return code */
){
  const int nDomain = pTest->nStep * pTest->nWriteStep;
  Datasource *pData;              /* Source of data */
  TestDb *pDb;                    /* First database connection (writer) */
  int iReader;                    /* Used to iterate through aReader */
  int iStep;                      /* Current step in test */
  int iDot = 0;                   /* Current step in test */

  /* Array of reader connections */
  struct Reader {
    TestDb *pDb;                  /* Connection handle */
    int iLast;                    /* Current snapshot contains keys 0..iLast */
  } *aReader;

  /* Create a data source */
  pData = testDatasourceNew(&pTest->defn);

  /* Open the writer connection */
  pDb = testOpen(zSystem, 1, pRc);

  /* Allocate aReader */
  aReader = (struct Reader *)testMalloc(sizeof(aReader[0]) * pTest->nReader);
  for(iReader=0; iReader<pTest->nReader; iReader++){
    aReader[iReader].pDb = testOpen(zSystem, 0, pRc);
  }

  for(iStep=0; iStep<pTest->nStep; iStep++){
    int iLast;
    int iBegin;                   /* Start read trans using aReader[iBegin] */

    /* Insert nWriteStep more records into the database */
    int iFirst = iStep*pTest->nWriteStep;
    testWriteDatasourceRange(pDb, pData, iFirst, pTest->nWriteStep, pRc);

    /* Check that the db is Ok according to the writer */
    iLast = (iStep+1) * pTest->nWriteStep - 1;
    testDbContents(pDb, pData, nDomain, 0, iLast, iLast, 1, pRc);

    /* Have reader (iStep % nReader) open a read transaction here. */
    iBegin = (iStep % pTest->nReader);
    if( iBegin<iStep ) tdb_commit(aReader[iBegin].pDb, 0);
    tdb_begin(aReader[iBegin].pDb, 1);
    aReader[iBegin].iLast = iLast;

    /* Check that the db is Ok for each open reader */
    for(iReader=0; iReader<pTest->nReader && aReader[iReader].iLast; iReader++){
      iLast = aReader[iReader].iLast;
      testDbContents(
          aReader[iReader].pDb, pData, nDomain, 0, iLast, iLast, 1, pRc
      );
    }

    /* Report progress */
    testCaseProgress(iStep, pTest->nStep, testCaseNDot(), &iDot);
  }

  /* Close all readers */
  for(iReader=0; iReader<pTest->nReader; iReader++){
    testClose(&aReader[iReader].pDb);
  }
  testFree(aReader);

  /* Close the writer-connection and free the datasource */
  testClose(&pDb);
  testDatasourceFree(pData);
}


void test_mc(
  const char *zSystem,            /* Database system name */
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  int i;
  Mctest aTest[] = {
    { { TEST_DATASOURCE_RANDOM, 10,10, 100,100 }, 100, 10, 5 },
  };

  for(i=0; i<ArraySize(aTest); i++){
    if( testCaseBegin(pRc, zPattern, "mc1.%s.%d", zSystem, i) ){
      do_mc_test(zSystem, &aTest[i], pRc);
      testCaseFinish(*pRc);
    }
  }
}

Added ext/lsm1/lsm-test/lsmtest5.c.



















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
** This file is broken into three semi-autonomous parts:
**
**   1. The database functions.
**   2. The thread wrappers.
**   3. The implementation of the mt1.* tests.
*/

/*************************************************************************
** DATABASE CONTENTS:
**
**   The database contains up to N key/value pairs, where N is some large 
**   number (say 10,000,000). Keys are integer values between 0 and (N-1).
**   The value associated with each key is a pseudo-random blob of data.
**
**   Key/value pair keys are encoded as the two bytes "k." followed by a 
**   10-digit decimal number. i.e. key 45 -> "k.0000000045".
**
**   As well as the key/value pairs, the database also contains checksum 
**   entries. The checksums form a hierarchy - for every F key/value
**   entries there is one level 1 checksum. And for each F level 1 checksums
**   there is one level 2 checksum. And so on.
**
**   Checksum keys are encoded as the two byte "c." followed by the 
**   checksum level, followed by a 10 digit decimal number containing
**   the value of the first key that contributes to the checksum value.
**   For example, assuming F==10, the level 1 checksum that spans keys
**   10 to 19 is "c.1.0000000010".
**
**   Clients may perform one of two operations on the database: a read
**   or a write.
** 
** READ OPERATIONS:
**
**   A read operation scans a range of F key/value pairs. It computes
**   the expected checksum and then compares the computed value to the
**   actual value stored in the level 1 checksum entry. It then scans 
**   the group of F level 1 checksums, and compares the computed checksum 
**   to the associated level 2 checksum value, and so on until the 
**   highest level checksum value has been verified.
**
**   If a checksum ever fails to match the expected value, the test 
**   has failed.
**
** WRITE OPERATIONS:
**
**   A write operation involves writing (possibly clobbering) a single
**   key/value pair. The associated level 1 checksum is then recalculated
**   updated. Then the level 2 checksum, and so on until the highest
**   level checksum has been modified.
**
**   All updates occur inside a single transaction.
**
** INTERFACE:
**
**   The interface used by test cases to read and write the db consists
**   of type DbParameters and the following functions:
**
**       dbReadOperation()
**       dbWriteOperation()
*/

#include "lsmtest.h"

typedef struct DbParameters DbParameters;
struct DbParameters {
  int nFanout;                    /* Checksum fanout (F) */
  int nKey;                       /* Size of key space (N) */
};

#define DB_KEY_BYTES          (2+5+10+1)

/*
** Argument aBuf[] must point to a buffer at least DB_KEY_BYTES in size.
** This function populates the buffer with a nul-terminated key string 
** corresponding to key iKey.
*/
static void dbFormatKey(
  DbParameters *pParam,
  int iLevel,
  int iKey,                       /* Key value */
  char *aBuf                      /* Write key string here */
){
  if( iLevel==0 ){
    snprintf(aBuf, DB_KEY_BYTES, "k.%.10d", iKey);
  }else{
    int f = 1;
    int i;
    for(i=0; i<iLevel; i++) f = f * pParam->nFanout;
    snprintf(aBuf, DB_KEY_BYTES, "c.%d.%.10d", iLevel, f*(iKey/f));
  }
}

/*
** Argument aBuf[] must point to a buffer at least DB_KEY_BYTES in size.
** This function populates the buffer with the string representation of
** checksum value iVal.
*/
static void dbFormatCksumValue(u32 iVal, char *aBuf){
  snprintf(aBuf, DB_KEY_BYTES, "%.10u", iVal);
}

/*
** Return the highest level of checksum in the database described
** by *pParam.
*/
static int dbMaxLevel(DbParameters *pParam){
  int iMax;
  int n = 1;
  for(iMax=0; n<pParam->nKey; iMax++){
    n = n * pParam->nFanout;
  }
  return iMax;
}

static void dbCksum(
  void *pCtx,                     /* IN/OUT: Pointer to u32 containing cksum */
  void *pKey, int nKey,           /* Database key. Unused. */
  void *pVal, int nVal            /* Database value. Checksum this. */
){
  u8 *aVal = (u8 *)pVal;
  u32 *pCksum = (u32 *)pCtx;
  u32 cksum = *pCksum;
  int i;

  unused_parameter(pKey);
  unused_parameter(nKey);

  for(i=0; i<nVal; i++){
    cksum += (cksum<<3) + (int)aVal[i];
  }

  *pCksum = cksum;
}

/*
** Compute the value of the checksum stored on level iLevel that contains
** data from key iKey by scanning the pParam->nFanout entries at level 
** iLevel-1.
*/
static u32 dbComputeCksum(
  DbParameters *pParam,           /* Database parameters */
  TestDb *pDb,                    /* Database connection handle */
  int iLevel,                     /* Level of checksum to compute */
  int iKey,                       /* Compute checksum for this key */
  int *pRc                        /* IN/OUT: Error code */
){
  u32 cksum = 0;
  if( *pRc==0 ){
    int nFirst;
    int nLast;
    int iFirst = 0;
    int iLast = 0;
    int i;
    int f = 1;
    char zFirst[DB_KEY_BYTES];
    char zLast[DB_KEY_BYTES];

    assert( iLevel>=1 );
    for(i=0; i<iLevel; i++) f = f * pParam->nFanout;

    iFirst = f*(iKey/f);
    iLast = iFirst + f - 1;
    dbFormatKey(pParam, iLevel-1, iFirst, zFirst);
    dbFormatKey(pParam, iLevel-1, iLast, zLast);
    nFirst = strlen(zFirst);
    nLast = strlen(zLast);

    *pRc = tdb_scan(pDb, (u32*)&cksum, 0, zFirst, nFirst, zLast, nLast,dbCksum);
  }

  return cksum;
}

static void dbReadOperation(
  DbParameters *pParam,           /* Database parameters */
  TestDb *pDb,                    /* Database connection handle */
  void (*xDelay)(void *),
  void *pDelayCtx,
  int iKey,                       /* Key to read */
  int *pRc                        /* IN/OUT: Error code */
){
  const int iMax = dbMaxLevel(pParam);
  int i;

  if( tdb_transaction_support(pDb) ) testBegin(pDb, 1, pRc);
  for(i=1; *pRc==0 && i<=iMax; i++){
    char zCksum[DB_KEY_BYTES];
    char zKey[DB_KEY_BYTES];
    u32 iCksum = 0;

    iCksum = dbComputeCksum(pParam, pDb, i, iKey, pRc);
    if( iCksum ){
      if( xDelay && i==1 ) xDelay(pDelayCtx);
      dbFormatCksumValue(iCksum, zCksum);
      dbFormatKey(pParam, i, iKey, zKey);
      testFetchStr(pDb, zKey, zCksum, pRc);
    }
  }
  if( tdb_transaction_support(pDb) ) testCommit(pDb, 0, pRc);
}

static int dbWriteOperation(
  DbParameters *pParam,           /* Database parameters */
  TestDb *pDb,                    /* Database connection handle */
  int iKey,                       /* Key to write to */
  const char *zValue,             /* Nul-terminated value to write */
  int *pRc                        /* IN/OUT: Error code */
){
  const int iMax = dbMaxLevel(pParam);
  char zKey[DB_KEY_BYTES];
  int i;
  int rc;

  assert( iKey>=0 && iKey<pParam->nKey );
  dbFormatKey(pParam, 0, iKey, zKey);

  /* Open a write transaction. This may fail - SQLITE4_BUSY */
  if( *pRc==0 && tdb_transaction_support(pDb) ){
    rc = tdb_begin(pDb, 2);
    if( rc==5 ) return 0;
    *pRc = rc;
  }

  testWriteStr(pDb, zKey, zValue, pRc);
  for(i=1; i<=iMax; i++){
    char zCksum[DB_KEY_BYTES];
    u32 iCksum = 0;

    iCksum = dbComputeCksum(pParam, pDb, i, iKey, pRc);
    dbFormatCksumValue(iCksum, zCksum);
    dbFormatKey(pParam, i, iKey, zKey);
    testWriteStr(pDb, zKey, zCksum, pRc);
  }
  if( tdb_transaction_support(pDb) ) testCommit(pDb, 0, pRc);
  return 1;
}

/*************************************************************************
** The following block contains testXXX() functions that implement a
** wrapper around the systems native multi-thread support. There are no
** synchronization primitives - just functions to launch and join 
** threads. Wrapper functions are:
**
**    testThreadSupport()
**
**    testThreadInit()
**    testThreadShutdown()
**    testThreadLaunch()
**    testThreadWait()
**
**    testThreadSetHalt()
**    testThreadGetHalt()
**    testThreadSetResult()
**    testThreadGetResult()
**
**    testThreadEnterMutex()
**    testThreadLeaveMutex()
*/
typedef struct ThreadSet ThreadSet;
#ifdef LSM_MUTEX_PTHREADS

#include <pthread.h>
#include <unistd.h>

typedef struct Thread Thread;
struct Thread {
  int rc;
  char *zMsg;
  pthread_t id;
  void (*xMain)(ThreadSet *, int, void *);
  void *pCtx;
  ThreadSet *pThreadSet;
};

struct ThreadSet {
  int bHalt;                      /* Halt flag */
  int nThread;                    /* Number of threads */
  Thread *aThread;                /* Array of Thread structures */
  pthread_mutex_t mutex;          /* Mutex used for cheating */
};

/*
** Return true if this build supports threads, or false otherwise. If
** this function returns false, no other testThreadXXX() functions should
** be called.
*/
static int testThreadSupport(){ return 1; }

/*
** Allocate and return a thread-set handle with enough space allocated
** to handle up to nMax threads. Each call to this function should be
** matched by a call to testThreadShutdown() to delete the object.
*/
static ThreadSet *testThreadInit(int nMax){
  int nByte;                      /* Total space to allocate */
  ThreadSet *p;                   /* Return value */

  nByte = sizeof(ThreadSet) + sizeof(struct Thread) * nMax;
  p = (ThreadSet *)testMalloc(nByte);
  p->nThread = nMax;
  p->aThread = (Thread *)&p[1];
  pthread_mutex_init(&p->mutex, 0);

  return p;
}

/*
** Delete a thread-set object and release all resources held by it.
*/
static void testThreadShutdown(ThreadSet *p){
  int i;
  for(i=0; i<p->nThread; i++){
    testFree(p->aThread[i].zMsg);
  }
  pthread_mutex_destroy(&p->mutex);
  testFree(p);
}

static void *ttMain(void *pArg){
  Thread *pThread = (Thread *)pArg;
  int iThread;
  iThread = (pThread - pThread->pThreadSet->aThread);
  pThread->xMain(pThread->pThreadSet, iThread, pThread->pCtx);
  return 0;
}

/*
** Launch a new thread.
*/
static int testThreadLaunch(
  ThreadSet *p,
  int iThread,
  void (*xMain)(ThreadSet *, int, void *),
  void *pCtx
){
  int rc;
  Thread *pThread;

  assert( iThread>=0 && iThread<p->nThread );

  pThread = &p->aThread[iThread];
  assert( pThread->pThreadSet==0 );
  pThread->xMain = xMain;
  pThread->pCtx = pCtx;
  pThread->pThreadSet = p;
  rc = pthread_create(&pThread->id, 0, ttMain, (void *)pThread);

  return rc;
}

/*
** Set the thread-set "halt" flag.
*/
static void testThreadSetHalt(ThreadSet *pThreadSet){
  pThreadSet->bHalt = 1;
}

/*
** Return the current value of the thread-set "halt" flag.
*/
static int testThreadGetHalt(ThreadSet *pThreadSet){
  return pThreadSet->bHalt;
}

static void testThreadSleep(ThreadSet *pThreadSet, int nMs){
  int nRem = nMs;
  while( nRem>0 && testThreadGetHalt(pThreadSet)==0 ){
    usleep(50000);
    nRem -= 50;
  }
}

/*
** Wait for all threads launched to finish before returning. If nMs
** is greater than zero, set the "halt" flag to tell all threads
** to halt after waiting nMs milliseconds.
*/
static void testThreadWait(ThreadSet *pThreadSet, int nMs){
  int i;

  testThreadSleep(pThreadSet, nMs);
  testThreadSetHalt(pThreadSet);
  for(i=0; i<pThreadSet->nThread; i++){
    Thread *pThread = &pThreadSet->aThread[i];
    if( pThread->xMain ){
      pthread_join(pThread->id, 0);
    }
  }
}

/*
** Set the result for thread iThread. 
*/
static void testThreadSetResult(
  ThreadSet *pThreadSet,          /* Thread-set handle */
  int iThread,                    /* Set result for this thread */
  int rc,                         /* Result error code */
  char *zFmt,                     /* Result string format */
  ...                             /* Result string formatting args... */
){
  va_list ap;

  testFree(pThreadSet->aThread[iThread].zMsg);
  pThreadSet->aThread[iThread].rc = rc;
  pThreadSet->aThread[iThread].zMsg = 0;
  if( zFmt ){
    va_start(ap, zFmt);
    pThreadSet->aThread[iThread].zMsg = testMallocVPrintf(zFmt, ap);
    va_end(ap);
  }
}

/*
** Retrieve the result for thread iThread. 
*/
static int testThreadGetResult(
  ThreadSet *pThreadSet,          /* Thread-set handle */
  int iThread,                    /* Get result for this thread */
  const char **pzRes              /* OUT: Pointer to result string */
){
  if( pzRes ) *pzRes = pThreadSet->aThread[iThread].zMsg;
  return pThreadSet->aThread[iThread].rc;
}

/*
** Enter and leave the test case mutex.
*/
#if 0
static void testThreadEnterMutex(ThreadSet *p){
  pthread_mutex_lock(&p->mutex);
}
static void testThreadLeaveMutex(ThreadSet *p){
  pthread_mutex_unlock(&p->mutex);
}
#endif
#endif

#if !defined(LSM_MUTEX_PTHREADS)
static int testThreadSupport(){ return 0; }

#define testThreadInit(a) 0
#define testThreadShutdown(a)
#define testThreadLaunch(a,b,c,d) 0
#define testThreadWait(a,b)
#define testThreadSetHalt(a)
#define testThreadGetHalt(a) 0
#define testThreadGetResult(a,b,c) 0
#define testThreadSleep(a,b) 0

static void testThreadSetResult(ThreadSet *a, int b, int c, char *d, ...){
  unused_parameter(a);
  unused_parameter(b);
  unused_parameter(c);
  unused_parameter(d);
}
#endif
/* End of threads wrapper.
*************************************************************************/

/*************************************************************************
** Below this point is the third part of this file - the implementation
** of the mt1.* tests.
*/
typedef struct Mt1Test Mt1Test;
struct Mt1Test {
  DbParameters param;             /* Description of database to read/write */
  int nReadwrite;                 /* Number of read/write threads */
  int nFastReader;                /* Number of fast reader threads */
  int nSlowReader;                /* Number of slow reader threads */
  int nMs;                        /* How long to run for */
  const char *zSystem;            /* Database system to test */
};

typedef struct Mt1DelayCtx Mt1DelayCtx;
struct Mt1DelayCtx {
  ThreadSet *pSet;                /* Threadset to sleep within */
  int nMs;                        /* Sleep in ms */
};

static void xMt1Delay(void *pCtx){
  Mt1DelayCtx *p = (Mt1DelayCtx *)pCtx;
  testThreadSleep(p->pSet, p->nMs);
}

#define MT1_THREAD_RDWR 0
#define MT1_THREAD_SLOW 1
#define MT1_THREAD_FAST 2

static void xMt1Work(lsm_db *pDb, void *pCtx){
#if 0
  char *z = 0;
  lsm_info(pDb, LSM_INFO_DB_STRUCTURE, &z);
  printf("%s\n", z);
  fflush(stdout);
#endif
}

/*
** This is the main() proc for all threads in test case "mt1".
*/
static void mt1Main(ThreadSet *pThreadSet, int iThread, void *pCtx){
  Mt1Test *p = (Mt1Test *)pCtx;   /* Test parameters */
  Mt1DelayCtx delay;
  int nRead = 0;                  /* Number of calls to dbReadOperation() */
  int nWrite = 0;                 /* Number of completed database writes */
  int rc = 0;                     /* Error code */
  int iPrng;                      /* Prng argument variable */
  TestDb *pDb;                    /* Database handle */
  int eType;

  delay.pSet = pThreadSet;
  delay.nMs = 0;
  if( iThread<p->nReadwrite ){
    eType = MT1_THREAD_RDWR;
  }else if( iThread<(p->nReadwrite+p->nFastReader) ){
    eType = MT1_THREAD_FAST;
  }else{
    eType = MT1_THREAD_SLOW;
    delay.nMs = (p->nMs / 20);
  }

  /* Open a new database connection. Initialize the pseudo-random number
  ** argument based on the thread number.  */
  iPrng = testPrngValue(iThread);
  pDb = testOpen(p->zSystem, 0, &rc);

  if( rc==0 ){
    tdb_lsm_config_work_hook(pDb, xMt1Work, 0);
  }

  /* Loop until either an error occurs or some other thread sets the
  ** halt flag.  */
  while( rc==0 && testThreadGetHalt(pThreadSet)==0 ){
    int iKey;

    /* Perform a read operation on an arbitrarily selected key. */
    iKey = (testPrngValue(iPrng++) % p->param.nKey);
    dbReadOperation(&p->param, pDb, xMt1Delay, (void *)&delay, iKey, &rc);
    if( rc ) continue;
    nRead++;

    /* Attempt to write an arbitrary key value pair (and update the associated
    ** checksum entries). dbWriteOperation() returns 1 if the write is
    ** successful, or 0 if it failed with an LSM_BUSY error.  */
    if( eType==MT1_THREAD_RDWR ){
      char aValue[50];
      char aRnd[25];

      iKey = (testPrngValue(iPrng++) % p->param.nKey);
      testPrngString(iPrng, aRnd, sizeof(aRnd));
      iPrng += sizeof(aRnd);
      snprintf(aValue, sizeof(aValue), "%d.%s", iThread, aRnd);
      nWrite += dbWriteOperation(&p->param, pDb, iKey, aValue, &rc);
    }
  }
  testClose(&pDb);

  /* If an error has occured, set the thread error code and the threadset 
  ** halt flag to tell the other test threads to halt. Otherwise, set the
  ** thread error code to 0 and post a message with the number of read
  ** and write operations completed.  */
  if( rc ){
    testThreadSetResult(pThreadSet, iThread, rc, 0);
    testThreadSetHalt(pThreadSet);
  }else{
    testThreadSetResult(pThreadSet, iThread, 0, "r/w: %d/%d", nRead, nWrite);
  }
}

static void do_test_mt1(
  const char *zSystem,            /* Database system name */
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  Mt1Test aTest[] = {
    /* param, nReadwrite, nFastReader, nSlowReader, nMs, zSystem */
    { {10, 1000},     4, 0, 0,   10000,   0 },
    { {10, 1000},     4, 4, 2,   100000,  0 },
    { {10, 100000},   4, 0, 0,   10000,   0 },
    { {10, 100000},   4, 4, 2,   100000,  0 },
  };
  int i;

  for(i=0; *pRc==0 && i<ArraySize(aTest); i++){
    Mt1Test *p = &aTest[i];
    int bRun = testCaseBegin(pRc, zPattern, 
        "mt1.%s.db=%d,%d.ms=%d.rdwr=%d.fast=%d.slow=%d", 
        zSystem, p->param.nFanout, p->param.nKey, 
        p->nMs, p->nReadwrite, p->nFastReader, p->nSlowReader
    );
    if( bRun ){
      TestDb *pDb;
      ThreadSet *pSet;
      int iThread;
      int nThread;

      p->zSystem = zSystem;
      pDb = testOpen(zSystem, 1, pRc);

      nThread = p->nReadwrite + p->nFastReader + p->nSlowReader;
      pSet = testThreadInit(nThread);
      for(iThread=0; *pRc==0 && iThread<nThread; iThread++){
        testThreadLaunch(pSet, iThread, mt1Main, (void *)p);
      }

      testThreadWait(pSet, p->nMs);
      for(iThread=0; *pRc==0 && iThread<nThread; iThread++){
        *pRc = testThreadGetResult(pSet, iThread, 0);
      }
      testCaseFinish(*pRc);

      for(iThread=0; *pRc==0 && iThread<nThread; iThread++){
        const char *zMsg = 0;
        *pRc = testThreadGetResult(pSet, iThread, &zMsg);
        printf("  Info: thread %d (%d): %s\n", iThread, *pRc, zMsg);
      }

      testThreadShutdown(pSet);
      testClose(&pDb);
    }
  }
}

void test_mt(
  const char *zSystem,            /* Database system name */
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  if( testThreadSupport()==0 ) return;
  do_test_mt1(zSystem, zPattern, pRc);
}

Added ext/lsm1/lsm-test/lsmtest6.c.













































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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#include "lsmtest.h"

typedef struct OomTest OomTest;
struct OomTest {
  lsm_env *pEnv;
  int iNext;                      /* Next value to pass to testMallocOom() */
  int nFail;                      /* Number of OOM events injected */
  int bEnable;
  int rc;                         /* Test case error code */
};

static void testOomStart(OomTest *p){
  memset(p, 0, sizeof(OomTest));
  p->iNext = 1;
  p->bEnable = 1;
  p->nFail = 1;
  p->pEnv = tdb_lsm_env();
}

static void xOomHook(OomTest *p){
  p->nFail++;
}

static int testOomContinue(OomTest *p){
  if( p->rc!=0 || (p->iNext>1 && p->nFail==0) ){
    return 0;
  }
  p->nFail = 0;
  testMallocOom(p->pEnv, p->iNext, 0, (void (*)(void*))xOomHook, (void *)p);
  return 1;
}

static void testOomEnable(OomTest *p, int bEnable){
  p->bEnable = bEnable;
  testMallocOomEnable(p->pEnv, bEnable);
}

static void testOomNext(OomTest *p){
  p->iNext++;
}

static int testOomHit(OomTest *p){
  return (p->nFail>0);
}

static int testOomFinish(OomTest *p){
  return p->rc;
}

static void testOomAssert(OomTest *p, int bVal){
  if( bVal==0 ){
    test_failed();
    p->rc = 1;
  }
}

/*
** Test that the error code matches the state of the OomTest object passed
** as the first argument. Specifically, check that rc is LSM_NOMEM if an 
** OOM error has already been injected, or LSM_OK if not.
*/
static void testOomAssertRc(OomTest *p, int rc){
  testOomAssert(p, rc==LSM_OK || rc==LSM_NOMEM);
  testOomAssert(p, testOomHit(p)==(rc==LSM_NOMEM) || p->bEnable==0 );
}

static void testOomOpen(
  OomTest *pOom,
  const char *zName,
  lsm_db **ppDb,
  int *pRc
){
  if( *pRc==LSM_OK ){
    int rc;
    rc = lsm_new(tdb_lsm_env(), ppDb);
    if( rc==LSM_OK ) rc = lsm_open(*ppDb, zName);
    testOomAssertRc(pOom, rc);
    *pRc = rc;
  }
}

static void testOomFetch(
  OomTest *pOom,
  lsm_db *pDb,
  void *pKey, int nKey,
  void *pVal, int nVal,
  int *pRc
){
  testOomAssertRc(pOom, *pRc);
  if( *pRc==LSM_OK ){
    lsm_cursor *pCsr;
    int rc;

    rc = lsm_csr_open(pDb, &pCsr);
    if( rc==LSM_OK ) rc = lsm_csr_seek(pCsr, pKey, nKey, 0);
    testOomAssertRc(pOom, rc);

    if( rc==LSM_OK ){
      const void *p; int n;
      testOomAssert(pOom, lsm_csr_valid(pCsr));

      rc = lsm_csr_key(pCsr, &p, &n);
      testOomAssertRc(pOom, rc);
      testOomAssert(pOom, rc!=LSM_OK || (n==nKey && memcmp(pKey, p, nKey)==0) );
    }

    if( rc==LSM_OK ){
      const void *p; int n;
      testOomAssert(pOom, lsm_csr_valid(pCsr));

      rc = lsm_csr_value(pCsr, &p, &n);
      testOomAssertRc(pOom, rc);
      testOomAssert(pOom, rc!=LSM_OK || (n==nVal && memcmp(pVal, p, nVal)==0) );
    }

    lsm_csr_close(pCsr);
    *pRc = rc;
  }
}

static void testOomWrite(
  OomTest *pOom,
  lsm_db *pDb,
  void *pKey, int nKey,
  void *pVal, int nVal,
  int *pRc
){
  testOomAssertRc(pOom, *pRc);
  if( *pRc==LSM_OK ){
    int rc;

    rc = lsm_insert(pDb, pKey, nKey, pVal, nVal);
    testOomAssertRc(pOom, rc);

    *pRc = rc;
  }
}


static void testOomFetchStr(
  OomTest *pOom,
  lsm_db *pDb,
  const char *zKey,
  const char *zVal,
  int *pRc
){
  int nKey = strlen(zKey);
  int nVal = strlen(zVal);
  testOomFetch(pOom, pDb, (void *)zKey, nKey, (void *)zVal, nVal, pRc);
}

static void testOomFetchData(
  OomTest *pOom,
  lsm_db *pDb,
  Datasource *pData,
  int iKey,
  int *pRc
){
  void *pKey; int nKey;
  void *pVal; int nVal;
  testDatasourceEntry(pData, iKey, &pKey, &nKey, &pVal, &nVal);
  testOomFetch(pOom, pDb, pKey, nKey, pVal, nVal, pRc);
}

static void testOomWriteStr(
  OomTest *pOom,
  lsm_db *pDb,
  const char *zKey,
  const char *zVal,
  int *pRc
){
  int nKey = strlen(zKey);
  int nVal = strlen(zVal);
  testOomWrite(pOom, pDb, (void *)zKey, nKey, (void *)zVal, nVal, pRc);
}

static void testOomWriteData(
  OomTest *pOom,
  lsm_db *pDb,
  Datasource *pData,
  int iKey,
  int *pRc
){
  void *pKey; int nKey;
  void *pVal; int nVal;
  testDatasourceEntry(pData, iKey, &pKey, &nKey, &pVal, &nVal);
  testOomWrite(pOom, pDb, pKey, nKey, pVal, nVal, pRc);
}

static void testOomScan(
  OomTest *pOom, 
  lsm_db *pDb, 
  int bReverse,
  const void *pKey, int nKey,
  int nScan,
  int *pRc
){
  if( *pRc==0 ){
    int rc;
    int iScan = 0;
    lsm_cursor *pCsr;
    int (*xAdvance)(lsm_cursor *);
    

    rc = lsm_csr_open(pDb, &pCsr);
    testOomAssertRc(pOom, rc);

    if( rc==LSM_OK ){
      if( bReverse ){
        rc = lsm_csr_seek(pCsr, pKey, nKey, LSM_SEEK_LE);
        xAdvance = lsm_csr_prev;
      }else{
        rc = lsm_csr_seek(pCsr, pKey, nKey, LSM_SEEK_GE);
        xAdvance = lsm_csr_next;
      }
    }
    testOomAssertRc(pOom, rc);

    while( rc==LSM_OK && lsm_csr_valid(pCsr) && iScan<nScan ){
      const void *p; int n;

      rc = lsm_csr_key(pCsr, &p, &n);
      testOomAssertRc(pOom, rc);
      if( rc==LSM_OK ){
        rc = lsm_csr_value(pCsr, &p, &n);
        testOomAssertRc(pOom, rc);
      }
      if( rc==LSM_OK ){
        rc = xAdvance(pCsr);
        testOomAssertRc(pOom, rc);
      }
      iScan++;
    }

    lsm_csr_close(pCsr);
    *pRc = rc;
  }
}

#define LSMTEST6_TESTDB "testdb.lsm" 

#ifndef _WIN32
# include <unistd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

void testDeleteLsmdb(const char *zFile){
  char *zLog = testMallocPrintf("%s-log", zFile);
  char *zShm = testMallocPrintf("%s-shm", zFile);
  unlink(zFile);
  unlink(zLog);
  unlink(zShm);
  testFree(zLog);
  testFree(zShm);
}

static void copy_file(const char *zFrom, const char *zTo){

  if( access(zFrom, F_OK) ){
    unlink(zTo);
  }else{
    int fd1;
    int fd2;
    off_t sz;
    off_t i;
    struct stat buf;
    u8 *aBuf;

    fd1 = open(zFrom, O_RDONLY, 0644);
    fd2 = open(zTo, O_RDWR | O_CREAT, 0644);

    fstat(fd1, &buf);
    sz = buf.st_size;
    ftruncate(fd2, sz);

    aBuf = testMalloc(4096);
    for(i=0; i<sz; i+=4096){
      int nByte = MIN(4096, sz - i);
      read(fd1, aBuf, nByte);
      write(fd2, aBuf, nByte);
    }
    testFree(aBuf);

    close(fd1);
    close(fd2);
  }
}

void testCopyLsmdb(const char *zFrom, const char *zTo){
  char *zLog1 = testMallocPrintf("%s-log", zFrom);
  char *zLog2 = testMallocPrintf("%s-log", zTo);
  char *zShm1 = testMallocPrintf("%s-shm", zFrom);
  char *zShm2 = testMallocPrintf("%s-shm", zTo);

  unlink(zShm2);
  unlink(zLog2);
  unlink(zTo);
  copy_file(zFrom, zTo);
  copy_file(zLog1, zLog2);
  copy_file(zShm1, zShm2);

  testFree(zLog1); testFree(zLog2); testFree(zShm1); testFree(zShm2);
}

/*
** File zFile is the path to a database. This function makes backups
** of the database file and its log as follows:
**
**     cp $(zFile)         $(zFile)-save
**     cp $(zFile)-$(zAux) $(zFile)-save-$(zAux)
**
** Function testRestoreDb() can be used to copy the files back in the
** other direction.
*/
void testSaveDb(const char *zFile, const char *zAux){
  char *zLog = testMallocPrintf("%s-%s", zFile, zAux);
  char *zFileSave = testMallocPrintf("%s-save", zFile);
  char *zLogSave = testMallocPrintf("%s-%s-save", zFile, zAux);

  unlink(zFileSave);
  unlink(zLogSave);
  copy_file(zFile, zFileSave);
  copy_file(zLog, zLogSave);

  testFree(zLog); testFree(zFileSave); testFree(zLogSave);
}

/*
** File zFile is the path to a database. This function restores
** a backup of the database made by a previous call to testSaveDb().
** Specifically, it does the equivalent of:
**
**     cp $(zFile)-save         $(zFile)
**     cp $(zFile)-save-$(zAux) $(zFile)-$(zAux)
*/
void testRestoreDb(const char *zFile, const char *zAux){
  char *zLog = testMallocPrintf("%s-%s", zFile, zAux);
  char *zFileSave = testMallocPrintf("%s-save", zFile);
  char *zLogSave = testMallocPrintf("%s-%s-save", zFile, zAux);

  copy_file(zFileSave, zFile);
  copy_file(zLogSave, zLog);

  testFree(zLog); testFree(zFileSave); testFree(zLogSave);
}


static int lsmWriteStr(lsm_db *pDb, const char *zKey, const char *zVal){
  int nKey = strlen(zKey);
  int nVal = strlen(zVal);
  return lsm_insert(pDb, (void *)zKey, nKey, (void *)zVal, nVal);
}

static void setup_delete_db(){
  testDeleteLsmdb(LSMTEST6_TESTDB);
}

/*
** Create a small database. With the following content:
**
**    "one"   -> "one"
**    "two"   -> "four"
**    "three" -> "nine"
**    "four"  -> "sixteen"
**    "five"  -> "twentyfive"
**    "six"   -> "thirtysix"
**    "seven" -> "fourtynine"
**    "eight" -> "sixtyfour"
*/
static void setup_populate_db(){
  const char *azStr[] = {
    "one",   "one",
    "two",   "four",
    "three", "nine",
    "four",  "sixteen",
    "five",  "twentyfive",
    "six",   "thirtysix",
    "seven", "fourtynine",
    "eight", "sixtyfour",
  };
  int rc;
  int ii;
  lsm_db *pDb;

  testDeleteLsmdb(LSMTEST6_TESTDB);

  rc = lsm_new(tdb_lsm_env(), &pDb);
  if( rc==LSM_OK ) rc = lsm_open(pDb, LSMTEST6_TESTDB);

  for(ii=0; rc==LSM_OK && ii<ArraySize(azStr); ii+=2){
    rc = lsmWriteStr(pDb, azStr[ii], azStr[ii+1]);
  }
  lsm_close(pDb);

  testSaveDb(LSMTEST6_TESTDB, "log");
  assert( rc==LSM_OK );
}

static Datasource *getDatasource(void){
  const DatasourceDefn defn = { TEST_DATASOURCE_RANDOM, 10, 15, 200, 250 };
  return testDatasourceNew(&defn);
}

/*
** Set up a database file with the following properties:
**
**   * Page size is 1024 bytes.
**   * Block size is 64 KB.
**   * Contains 5000 key-value pairs starting at 0 from the
**     datasource returned getDatasource().
*/
static void setup_populate_db2(){
  Datasource *pData;
  int ii;
  int rc;
  int nBlocksize = 64*1024;
  int nPagesize = 1024;
  int nWritebuffer = 4*1024;
  lsm_db *pDb;

  testDeleteLsmdb(LSMTEST6_TESTDB);
  rc = lsm_new(tdb_lsm_env(), &pDb);
  if( rc==LSM_OK ) rc = lsm_open(pDb, LSMTEST6_TESTDB);

  lsm_config(pDb, LSM_CONFIG_BLOCK_SIZE, &nBlocksize); 
  lsm_config(pDb, LSM_CONFIG_PAGE_SIZE, &nPagesize); 
  lsm_config(pDb, LSM_CONFIG_AUTOFLUSH, &nWritebuffer); 

  pData = getDatasource();
  for(ii=0; rc==LSM_OK && ii<5000; ii++){
    void *pKey; int nKey;
    void *pVal; int nVal;
    testDatasourceEntry(pData, ii, &pKey, &nKey, &pVal, &nVal);
    lsm_insert(pDb, pKey, nKey, pVal, nVal);
  }
  testDatasourceFree(pData);
  lsm_close(pDb);

  testSaveDb(LSMTEST6_TESTDB, "log");
  assert( rc==LSM_OK );
}

/*
** Test the results of OOM conditions in lsm_new().
*/
static void simple_oom_1(OomTest *pOom){
  int rc;
  lsm_db *pDb;

  rc = lsm_new(tdb_lsm_env(), &pDb);
  testOomAssertRc(pOom, rc);

  lsm_close(pDb);
}

/*
** Test the results of OOM conditions in lsm_open().
*/
static void simple_oom_2(OomTest *pOom){
  int rc;
  lsm_db *pDb;

  rc = lsm_new(tdb_lsm_env(), &pDb);
  if( rc==LSM_OK ){
    rc = lsm_open(pDb, "testdb.lsm");
  }
  testOomAssertRc(pOom, rc);

  lsm_close(pDb);
}

/*
** Test the results of OOM conditions in simple fetch operations.
*/
static void simple_oom_3(OomTest *pOom){
  int rc = LSM_OK;
  lsm_db *pDb;

  testOomOpen(pOom, LSMTEST6_TESTDB, &pDb, &rc);

  testOomFetchStr(pOom, pDb, "four",  "sixteen",    &rc);
  testOomFetchStr(pOom, pDb, "seven", "fourtynine", &rc);
  testOomFetchStr(pOom, pDb, "one",   "one",        &rc);
  testOomFetchStr(pOom, pDb, "eight", "sixtyfour",  &rc);

  lsm_close(pDb);
}

/*
** Test the results of OOM conditions in simple write operations.
*/
static void simple_oom_4(OomTest *pOom){
  int rc = LSM_OK;
  lsm_db *pDb;

  testDeleteLsmdb(LSMTEST6_TESTDB);
  testOomOpen(pOom, LSMTEST6_TESTDB, &pDb, &rc);

  testOomWriteStr(pOom, pDb, "123", "onetwothree", &rc);
  testOomWriteStr(pOom, pDb, "456", "fourfivesix", &rc);
  testOomWriteStr(pOom, pDb, "789", "seveneightnine", &rc);
  testOomWriteStr(pOom, pDb, "123", "teneleventwelve", &rc);
  testOomWriteStr(pOom, pDb, "456", "fourteenfifteensixteen", &rc);

  lsm_close(pDb);
}

static void simple_oom_5(OomTest *pOom){
  Datasource *pData = getDatasource();
  int rc = LSM_OK;
  lsm_db *pDb;

  testRestoreDb(LSMTEST6_TESTDB, "log");
  testOomOpen(pOom, LSMTEST6_TESTDB, &pDb, &rc);

  testOomFetchData(pOom, pDb, pData, 3333, &rc);
  testOomFetchData(pOom, pDb, pData, 0, &rc);
  testOomFetchData(pOom, pDb, pData, 4999, &rc);

  lsm_close(pDb);
  testDatasourceFree(pData);
}

static void simple_oom_6(OomTest *pOom){
  Datasource *pData = getDatasource();
  int rc = LSM_OK;
  lsm_db *pDb;

  testRestoreDb(LSMTEST6_TESTDB, "log");
  testOomOpen(pOom, LSMTEST6_TESTDB, &pDb, &rc);

  testOomWriteData(pOom, pDb, pData, 5000, &rc);
  testOomWriteData(pOom, pDb, pData, 5001, &rc);
  testOomWriteData(pOom, pDb, pData, 5002, &rc);
  testOomFetchData(pOom, pDb, pData, 5001, &rc);
  testOomFetchData(pOom, pDb, pData, 1234, &rc);

  lsm_close(pDb);
  testDatasourceFree(pData);
}

static void simple_oom_7(OomTest *pOom){
  Datasource *pData = getDatasource();
  int rc = LSM_OK;
  lsm_db *pDb;

  testRestoreDb(LSMTEST6_TESTDB, "log");
  testOomOpen(pOom, LSMTEST6_TESTDB, &pDb, &rc);
  testOomScan(pOom, pDb, 0, "abc", 3, 20, &rc);
  lsm_close(pDb);
  testDatasourceFree(pData);
}

static void simple_oom_8(OomTest *pOom){
  Datasource *pData = getDatasource();
  int rc = LSM_OK;
  lsm_db *pDb;
  testRestoreDb(LSMTEST6_TESTDB, "log");
  testOomOpen(pOom, LSMTEST6_TESTDB, &pDb, &rc);
  testOomScan(pOom, pDb, 1, "xyz", 3, 20, &rc);
  lsm_close(pDb);
  testDatasourceFree(pData);
}

/*
** This test case has two clients connected to a database. The first client
** hits an OOM while writing to the database. Check that the second 
** connection is still able to query the db following the OOM.
*/
static void simple_oom2_1(OomTest *pOom){
  const int nRecord = 100;        /* Number of records initially in db */
  const int nIns = 10;            /* Number of records inserted with OOM */

  Datasource *pData = getDatasource();
  int rc = LSM_OK;
  lsm_db *pDb1;
  lsm_db *pDb2;
  int i;

  testDeleteLsmdb(LSMTEST6_TESTDB);

  /* Open the two connections. Initialize the in-memory tree so that it
  ** contains 100 records. Do all this with OOM injection disabled. */
  testOomEnable(pOom, 0);
  testOomOpen(pOom, LSMTEST6_TESTDB, &pDb1, &rc);
  testOomOpen(pOom, LSMTEST6_TESTDB, &pDb2, &rc);
  for(i=0; i<nRecord; i++){
    testOomWriteData(pOom, pDb1, pData, i, &rc);
  }
  testOomEnable(pOom, 1);
  assert( rc==0 );

  /* Insert 10 more records using pDb1. Stop when an OOM is encountered. */
  for(i=nRecord; i<nRecord+nIns; i++){
    testOomWriteData(pOom, pDb1, pData, i, &rc);
    if( rc ) break;
  }
  testOomAssertRc(pOom, rc);

  /* Switch off OOM injection. Write a few rows using pDb2. Then check
  ** that the database may be successfully queried.  */
  testOomEnable(pOom, 0);
  rc = 0;
  for(; i<nRecord+nIns && rc==0; i++){
    testOomWriteData(pOom, pDb2, pData, i, &rc);
  }
  for(i=0; i<nRecord+nIns; i++) testOomFetchData(pOom, pDb2, pData, i, &rc);
  testOomEnable(pOom, 1);

  lsm_close(pDb1);
  lsm_close(pDb2);
  testDatasourceFree(pData);
}


static void do_test_oom1(const char *zPattern, int *pRc){
  struct SimpleOom {
    const char *zName;
    void (*xSetup)(void);
    void (*xFunc)(OomTest *);
  } aSimple[] = {
    { "oom1.lsm.1", setup_delete_db,    simple_oom_1 },
    { "oom1.lsm.2", setup_delete_db,    simple_oom_2 },
    { "oom1.lsm.3", setup_populate_db,  simple_oom_3 },
    { "oom1.lsm.4", setup_delete_db,    simple_oom_4 },
    { "oom1.lsm.5", setup_populate_db2, simple_oom_5 },
    { "oom1.lsm.6", setup_populate_db2, simple_oom_6 },
    { "oom1.lsm.7", setup_populate_db2, simple_oom_7 },
    { "oom1.lsm.8", setup_populate_db2, simple_oom_8 },

    { "oom2.lsm.1", setup_delete_db,    simple_oom2_1 },
  };
  int i;

  for(i=0; i<ArraySize(aSimple); i++){
    if( *pRc==0 && testCaseBegin(pRc, zPattern, "%s", aSimple[i].zName) ){
      OomTest t;

      if( aSimple[i].xSetup ){
        aSimple[i].xSetup();
      }

      for(testOomStart(&t); testOomContinue(&t); testOomNext(&t)){
        aSimple[i].xFunc(&t);
      }

      printf("(%d injections).", t.iNext-2);
      testCaseFinish( (*pRc = testOomFinish(&t)) );
      testMallocOom(tdb_lsm_env(), 0, 0, 0, 0);
    }
  }
}

void test_oom(
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  do_test_oom1(zPattern, pRc);
}

Added ext/lsm1/lsm-test/lsmtest7.c.





























































































































































































































































































































































































































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#include "lsmtest.h"


/*
** Test that the rules for when lsm_csr_next() and lsm_csr_prev() are
** enforced. Specifically:
**
**   * Both functions always return LSM_MISUSE if the cursor is at EOF
**     when they are called.
**
**   * lsm_csr_next() may only be used after lsm_csr_seek(LSM_SEEK_GE) or 
**     lsm_csr_first(). 
**
**   * lsm_csr_prev() may only be used after lsm_csr_seek(LSM_SEEK_LE) or 
**     lsm_csr_last().
*/
static void do_test_api1_lsm(lsm_db *pDb, int *pRc){
  int ret;
  lsm_cursor *pCsr;
  lsm_cursor *pCsr2;
  int nKey;
  const void *pKey;

  ret = lsm_csr_open(pDb, &pCsr);
  testCompareInt(LSM_OK, ret, pRc);

  ret = lsm_csr_next(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);
  ret = lsm_csr_prev(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);

  ret = lsm_csr_seek(pCsr, "jjj", 3, LSM_SEEK_GE);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_next(pCsr);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_prev(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);

  ret = lsm_csr_seek(pCsr, "jjj", 3, LSM_SEEK_LE);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_next(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);
  ret = lsm_csr_prev(pCsr);
  testCompareInt(LSM_OK, ret, pRc);

  ret = lsm_csr_seek(pCsr, "jjj", 3, LSM_SEEK_LEFAST);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_next(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);
  ret = lsm_csr_prev(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);

  ret = lsm_csr_key(pCsr, &pKey, &nKey);
  testCompareInt(LSM_OK, ret, pRc);

  ret = lsm_csr_open(pDb, &pCsr2);
  testCompareInt(LSM_OK, ret, pRc);

  ret = lsm_csr_seek(pCsr2, pKey, nKey, LSM_SEEK_EQ);
  testCompareInt(LSM_OK, ret, pRc);
  testCompareInt(1, lsm_csr_valid(pCsr2), pRc);
  ret = lsm_csr_next(pCsr2);
  testCompareInt(LSM_MISUSE, ret, pRc);
  ret = lsm_csr_prev(pCsr2);
  testCompareInt(LSM_MISUSE, ret, pRc);

  lsm_csr_close(pCsr2);

  ret = lsm_csr_first(pCsr);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_next(pCsr);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_prev(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);

  ret = lsm_csr_last(pCsr);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_prev(pCsr);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_next(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);

  ret = lsm_csr_first(pCsr);
  while( lsm_csr_valid(pCsr) ){
    ret = lsm_csr_next(pCsr);
    testCompareInt(LSM_OK, ret, pRc);
  }
  ret = lsm_csr_next(pCsr);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_prev(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);

  ret = lsm_csr_last(pCsr);
  while( lsm_csr_valid(pCsr) ){
    ret = lsm_csr_prev(pCsr);
    testCompareInt(LSM_OK, ret, pRc);
  }
  ret = lsm_csr_prev(pCsr);
  testCompareInt(LSM_OK, ret, pRc);
  ret = lsm_csr_next(pCsr);
  testCompareInt(LSM_MISUSE, ret, pRc);

  lsm_csr_close(pCsr);
}

static void do_test_api1(const char *zPattern, int *pRc){
  if( testCaseBegin(pRc, zPattern, "api1.lsm") ){
    const DatasourceDefn defn = { TEST_DATASOURCE_RANDOM, 10, 15, 200, 250 };
    Datasource *pData;
    TestDb *pDb;
    int rc = 0;

    pDb = testOpen("lsm_lomem", 1, &rc);
    pData = testDatasourceNew(&defn);
    testWriteDatasourceRange(pDb, pData, 0, 1000, pRc);

    do_test_api1_lsm(tdb_lsm(pDb), pRc);

    testDatasourceFree(pData);
    testClose(&pDb);

    testCaseFinish(*pRc);
  }
}

static lsm_db *newLsmConnection(
  const char *zDb, 
  int nPgsz, 
  int nBlksz,
  int *pRc
){
  lsm_db *db = 0;
  if( *pRc==0 ){
    int n1 = nPgsz;
    int n2 = nBlksz;
    *pRc = lsm_new(tdb_lsm_env(), &db);
    if( *pRc==0 ){
      if( n1 ) lsm_config(db, LSM_CONFIG_PAGE_SIZE, &n1);
      if( n2 ) lsm_config(db, LSM_CONFIG_BLOCK_SIZE, &n2);
      *pRc = lsm_open(db, "testdb.lsm");
    }
  }
  return db;
}

static void testPagesize(lsm_db *db, int nPgsz, int nBlksz, int *pRc){
  if( *pRc==0 ){
    int n1 = 0;
    int n2 = 0;

    lsm_config(db, LSM_CONFIG_PAGE_SIZE, &n1);
    lsm_config(db, LSM_CONFIG_BLOCK_SIZE, &n2);

    testCompareInt(n1, nPgsz, pRc);
    testCompareInt(n2, nBlksz, pRc);
  }
}

/*
** Test case "api2" tests that the default page and block sizes of a 
** database may only be modified before lsm_open() is called. And that
** after lsm_open() is called lsm_config() may be used to read the 
** actual page and block size of the db.
*/
static void do_test_api2(const char *zPattern, int *pRc){
  if( *pRc==0 && testCaseBegin(pRc, zPattern, "api2.lsm") ){
    lsm_db *db1 = 0;
    lsm_db *db2 = 0;

    testDeleteLsmdb("testdb.lsm");
    db1 = newLsmConnection("testdb.lsm", 0, 0, pRc);
    testPagesize(db1, 4096, 1024, pRc);
    db2 = newLsmConnection("testdb.lsm", 1024, 64*1024, pRc);
    testPagesize(db2, 4096, 1024, pRc);
    lsm_close(db1);
    lsm_close(db2);

    testDeleteLsmdb("testdb.lsm");
    db1 = newLsmConnection("testdb.lsm", 1024, 64*1024, pRc);
    testPagesize(db1, 1024, 64*1024, pRc);
    db2 = newLsmConnection("testdb.lsm", 0, 0, pRc);
    testPagesize(db2, 1024, 64*1024, pRc);
    lsm_close(db1);
    lsm_close(db2);

    testDeleteLsmdb("testdb.lsm");
    db1 = newLsmConnection("testdb.lsm", 8192, 2*1024, pRc);
    testPagesize(db1, 8192, 2*1024, pRc);
    db2 = newLsmConnection("testdb.lsm", 1024, 64*1024, pRc);
    testPagesize(db2, 8192, 2*1024, pRc);
    lsm_close(db1);
    lsm_close(db2);

    testCaseFinish(*pRc);
  }
}

void test_api(
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  do_test_api1(zPattern, pRc);
  do_test_api2(zPattern, pRc);
}

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/*
** This file contains test cases to verify that "live-recovery" following
** a mid-transaction failure of a writer process.
*/


/* 
** This test file includes lsmInt.h to get access to the definition of the
** ShmHeader structure. This is required to cause strategic damage to the
** shared memory header as part of recovery testing.
*/
#include "lsmInt.h"

#include "lsmtest.h"

typedef struct SetupStep SetupStep;
struct SetupStep {
  int bFlush;                     /* Flush to disk and checkpoint */
  int iInsStart;                  /* First key-value from ds to insert */
  int nIns;                       /* Number of rows to insert */
  int iDelStart;                  /* First key from ds to delete */
  int nDel;                       /* Number of rows to delete */
};

static void doSetupStep(
  TestDb *pDb, 
  Datasource *pData, 
  const SetupStep *pStep, 
  int *pRc
){
  testWriteDatasourceRange(pDb, pData, pStep->iInsStart, pStep->nIns, pRc);
  testDeleteDatasourceRange(pDb, pData, pStep->iDelStart, pStep->nDel, pRc);
  if( *pRc==0 ){
    int nSave = -1;
    int nBuf = 64;
    lsm_db *db = tdb_lsm(pDb);

    lsm_config(db, LSM_CONFIG_AUTOFLUSH, &nSave);
    lsm_config(db, LSM_CONFIG_AUTOFLUSH, &nBuf);
    lsm_begin(db, 1);
    lsm_commit(db, 0);
    lsm_config(db, LSM_CONFIG_AUTOFLUSH, &nSave);

    *pRc = lsm_work(db, 0, 0, 0);
    if( *pRc==0 ){
      *pRc = lsm_checkpoint(db, 0);
    }
  }
}

static void doSetupStepArray(
  TestDb *pDb, 
  Datasource *pData, 
  const SetupStep *aStep, 
  int nStep
){
  int i;
  for(i=0; i<nStep; i++){
    int rc = 0;
    doSetupStep(pDb, pData, &aStep[i], &rc);
    assert( rc==0 );
  }
}

static void setupDatabase1(TestDb *pDb, Datasource **ppData){
  const SetupStep aStep[] = {
    { 0,                                  1,     2000, 0, 0 },
    { 1,                                  0,     0, 0, 0 },
    { 0,                                  10001, 1000, 0, 0 },
  };
  const DatasourceDefn defn = {TEST_DATASOURCE_RANDOM, 12, 16, 100, 500};
  Datasource *pData;

  pData = testDatasourceNew(&defn);
  doSetupStepArray(pDb, pData, aStep, ArraySize(aStep));
  if( ppData ){
    *ppData = pData;
  }else{
    testDatasourceFree(pData);
  }
}

#include <stdio.h>
void testReadFile(const char *zFile, int iOff, void *pOut, int nByte, int *pRc){
  if( *pRc==0 ){
    FILE *fd;
    fd = fopen(zFile, "r");
    if( fd==0 ){
      *pRc = 1;
    }else{
      if( 0!=fseek(fd, iOff, SEEK_SET) ){
        *pRc = 1;
      }else{
        if( nByte!=fread(pOut, 1, nByte, fd) ){
          *pRc = 1;
        }
      }
      fclose(fd);
    }
  }
}

void testWriteFile(
  const char *zFile, 
  int iOff, 
  void *pOut, 
  int nByte, 
  int *pRc
){
  if( *pRc==0 ){
    FILE *fd;
    fd = fopen(zFile, "r+");
    if( fd==0 ){
      *pRc = 1;
    }else{
      if( 0!=fseek(fd, iOff, SEEK_SET) ){
        *pRc = 1;
      }else{
        if( nByte!=fwrite(pOut, 1, nByte, fd) ){
          *pRc = 1;
        }
      }
      fclose(fd);
    }
  }
}

static ShmHeader *getShmHeader(const char *zDb){
  int rc = 0;
  char *zShm = testMallocPrintf("%s-shm", zDb);
  ShmHeader *pHdr;

  pHdr = testMalloc(sizeof(ShmHeader));
  testReadFile(zShm, 0, (void *)pHdr, sizeof(ShmHeader), &rc);
  assert( rc==0 );

  return pHdr;
}

/*
** This function makes a copy of the three files associated with LSM 
** database zDb (i.e. if zDb is "test.db", it makes copies of "test.db",
** "test.db-log" and "test.db-shm").
**
** It then opens a new database connection to the copy with the xLock() call
** instrumented so that it appears that some other process already connected
** to the db (holding a shared lock on DMS2). This prevents recovery from
** running. Then:
**
**    1) Check that the checksum of the database is zCksum. 
**    2) Write a few keys to the database. Then delete the same keys. 
**    3) Check that the checksum is zCksum.
**    4) Flush the db to disk and run a checkpoint. 
**    5) Check once more that the checksum is still zCksum.
*/
static void doLiveRecovery(const char *zDb, const char *zCksum, int *pRc){
  const DatasourceDefn defn = {TEST_DATASOURCE_RANDOM, 20, 25, 100, 500};
  Datasource *pData;
  const char *zCopy = "testcopy.lsm";
  char zCksum2[TEST_CKSUM_BYTES];
  TestDb *pDb = 0;
  int rc;

  pData = testDatasourceNew(&defn);

  testCopyLsmdb(zDb, zCopy);
  rc = tdb_lsm_open("test_no_recovery=1", zCopy, 0, &pDb);
  if( rc==0 ){
    ShmHeader *pHdr;
    lsm_db *db;
    testCksumDatabase(pDb, zCksum2);
    testCompareStr(zCksum, zCksum2, &rc);

    testWriteDatasourceRange(pDb, pData, 1, 10, &rc);
    testDeleteDatasourceRange(pDb, pData, 1, 10, &rc);

    /* Test that the two tree-headers are now consistent. */
    pHdr = getShmHeader(zCopy);
    if( rc==0 && memcmp(&pHdr->hdr1, &pHdr->hdr2, sizeof(pHdr->hdr1)) ){
      rc = 1;
    }
    testFree(pHdr);

    if( rc==0 ){
      int nBuf = 64;
      db = tdb_lsm(pDb);
      lsm_config(db, LSM_CONFIG_AUTOFLUSH, &nBuf);
      lsm_begin(db, 1);
      lsm_commit(db, 0);
      rc = lsm_work(db, 0, 0, 0);
    }

    testCksumDatabase(pDb, zCksum2);
    testCompareStr(zCksum, zCksum2, &rc);
  }

  testDatasourceFree(pData);
  testClose(&pDb);
  testDeleteLsmdb(zCopy);
  *pRc = rc;
}

static void doWriterCrash1(int *pRc){
  const int nWrite = 2000;
  const int nStep = 10;
  const int iWriteStart = 20000;
  int rc = 0;
  TestDb *pDb = 0;
  Datasource *pData = 0;

  rc = tdb_lsm_open("autowork=0", "testdb.lsm", 1, &pDb);
  if( rc==0 ){
    int iDot = 0;
    char zCksum[TEST_CKSUM_BYTES];
    int i;
    setupDatabase1(pDb, &pData);
    testCksumDatabase(pDb, zCksum);
    testBegin(pDb, 2, &rc);
    for(i=0; rc==0 && i<nWrite; i+=nStep){
      testCaseProgress(i, nWrite, testCaseNDot(), &iDot);
      testWriteDatasourceRange(pDb, pData, iWriteStart+i, nStep, &rc);
      doLiveRecovery("testdb.lsm", zCksum, &rc);
    }
  }
  testCommit(pDb, 0, &rc);
  testClose(&pDb);
  testDatasourceFree(pData);
  *pRc = rc;
}

/*
** This test case verifies that inconsistent tree-headers in shared-memory
** are resolved correctly. 
*/
static void doWriterCrash2(int *pRc){
  int rc = 0;
  TestDb *pDb = 0;
  Datasource *pData = 0;

  rc = tdb_lsm_open("autowork=0", "testdb.lsm", 1, &pDb);
  if( rc==0 ){
    ShmHeader *pHdr1;
    ShmHeader *pHdr2;
    char zCksum1[TEST_CKSUM_BYTES];
    char zCksum2[TEST_CKSUM_BYTES];

    pHdr1 = testMalloc(sizeof(ShmHeader));
    pHdr2 = testMalloc(sizeof(ShmHeader));
    setupDatabase1(pDb, &pData);

    /* Grab a copy of the shared-memory header. And the db checksum */
    testReadFile("testdb.lsm-shm", 0, (void *)pHdr1, sizeof(ShmHeader), &rc);
    testCksumDatabase(pDb, zCksum1);

    /* Modify the database */
    testBegin(pDb, 2, &rc);
    testWriteDatasourceRange(pDb, pData, 30000, 200, &rc);
    testCommit(pDb, 0, &rc);

    /* Grab a second copy of the shared-memory header. And the db checksum */
    testReadFile("testdb.lsm-shm", 0, (void *)pHdr2, sizeof(ShmHeader), &rc);
    testCksumDatabase(pDb, zCksum2);
    doLiveRecovery("testdb.lsm", zCksum2, &rc);

    /* If both tree-headers are valid, tree-header-1 is used. */
    memcpy(&pHdr2->hdr1, &pHdr1->hdr1, sizeof(pHdr1->hdr1));
    pHdr2->bWriter = 1;
    testWriteFile("testdb.lsm-shm", 0, (void *)pHdr2, sizeof(ShmHeader), &rc);
    doLiveRecovery("testdb.lsm", zCksum1, &rc);

    /* If both tree-headers are valid, tree-header-1 is used. */
    memcpy(&pHdr2->hdr1, &pHdr2->hdr2, sizeof(pHdr1->hdr1));
    memcpy(&pHdr2->hdr2, &pHdr1->hdr1, sizeof(pHdr1->hdr1));
    pHdr2->bWriter = 1;
    testWriteFile("testdb.lsm-shm", 0, (void *)pHdr2, sizeof(ShmHeader), &rc);
    doLiveRecovery("testdb.lsm", zCksum2, &rc);

    /* If tree-header 1 is invalid, tree-header-2 is used */
    memcpy(&pHdr2->hdr2, &pHdr2->hdr1, sizeof(pHdr1->hdr1));
    pHdr2->hdr1.aCksum[0] = 5;
    pHdr2->hdr1.aCksum[0] = 6;
    pHdr2->bWriter = 1;
    testWriteFile("testdb.lsm-shm", 0, (void *)pHdr2, sizeof(ShmHeader), &rc);
    doLiveRecovery("testdb.lsm", zCksum2, &rc);

    /* If tree-header 2 is invalid, tree-header-1 is used */
    memcpy(&pHdr2->hdr1, &pHdr2->hdr2, sizeof(pHdr1->hdr1));
    pHdr2->hdr2.aCksum[0] = 5;
    pHdr2->hdr2.aCksum[0] = 6;
    pHdr2->bWriter = 1;
    testWriteFile("testdb.lsm-shm", 0, (void *)pHdr2, sizeof(ShmHeader), &rc);
    doLiveRecovery("testdb.lsm", zCksum2, &rc);

    testFree(pHdr1);
    testFree(pHdr2);
    testClose(&pDb);
  }

  *pRc = rc;
}

void do_writer_crash_test(const char *zPattern, int *pRc){
  struct Test {
    const char *zName;
    void (*xFunc)(int *);
  } aTest[] = {
    { "writercrash1.lsm", doWriterCrash1 },
    { "writercrash2.lsm", doWriterCrash2 },
  };
  int i;
  for(i=0; i<ArraySize(aTest); i++){
    struct Test *p = &aTest[i];
    if( testCaseBegin(pRc, zPattern, p->zName) ){
      p->xFunc(pRc);
      testCaseFinish(*pRc);
    }
  }

}


Added ext/lsm1/lsm-test/lsmtest9.c.































































































































































































































































































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#include "lsmtest.h"

#define DATA_SEQUENTIAL TEST_DATASOURCE_SEQUENCE
#define DATA_RANDOM     TEST_DATASOURCE_RANDOM

typedef struct Datatest4 Datatest4;

/*
** Test overview:
**
**   1. Insert (Datatest4.nRec) records into a database.
**
**   2. Repeat (Datatest4.nRepeat) times:
**
**      2a. Delete 2/3 of the records in the database.
**
**      2b. Run lsm_work(nMerge=1).
**
**      2c. Insert as many records as were deleted in 2a.
**
**      2d. Check database content is as expected.
**
**      2e. If (Datatest4.bReopen) is true, close and reopen the database.
*/
struct Datatest4 {
  /* Datasource definition */
  DatasourceDefn defn;

  int nRec;
  int nRepeat;
  int bReopen;
};

static void doDataTest4(
  const char *zSystem,            /* Database system to test */
  Datatest4 *p,                   /* Structure containing test parameters */
  int *pRc                        /* OUT: Error code */
){
  lsm_db *db = 0;
  TestDb *pDb;
  TestDb *pControl;
  Datasource *pData;
  int i;
  int rc = 0;
  int iDot = 0;
  int bMultiThreaded = 0;         /* True for MT LSM database */

  int nRecOn3 = (p->nRec / 3);
  int iData = 0;

  /* Start the test case, open a database and allocate the datasource. */
  rc = testControlDb(&pControl);
  pDb = testOpen(zSystem, 1, &rc);
  pData = testDatasourceNew(&p->defn);
  if( rc==0 ){
    db = tdb_lsm(pDb);
    bMultiThreaded = tdb_lsm_multithread(pDb);
  }

  testWriteDatasourceRange(pControl, pData, iData, nRecOn3*3, &rc);
  testWriteDatasourceRange(pDb,      pData, iData, nRecOn3*3, &rc);

  for(i=0; rc==0 && i<p->nRepeat; i++){

    testDeleteDatasourceRange(pControl, pData, iData, nRecOn3*2, &rc);
    testDeleteDatasourceRange(pDb,      pData, iData, nRecOn3*2, &rc);

    if( db ){
      int nDone;
#if 0
      fprintf(stderr, "lsm_work() start...\n"); fflush(stderr);
#endif
      do {
        nDone = 0;
        rc = lsm_work(db, 1, (1<<30), &nDone);
      }while( rc==0 && nDone>0 );
      if( bMultiThreaded && rc==LSM_BUSY ) rc = LSM_OK;
#if 0 
      fprintf(stderr, "lsm_work() done...\n"); fflush(stderr);
#endif
    }

if( i+1<p->nRepeat ){
    iData += (nRecOn3*2);
    testWriteDatasourceRange(pControl, pData, iData+nRecOn3, nRecOn3*2, &rc);
    testWriteDatasourceRange(pDb,      pData, iData+nRecOn3, nRecOn3*2, &rc);

    testCompareDb(pData, nRecOn3*3, iData, pControl, pDb, &rc);

    /* If Datatest4.bReopen is true, close and reopen the database */
    if( p->bReopen ){
      testReopen(&pDb, &rc);
      if( rc==0 ) db = tdb_lsm(pDb);
    }
}

    /* Update the progress dots... */
    testCaseProgress(i, p->nRepeat, testCaseNDot(), &iDot);
  }

  testClose(&pDb);
  testClose(&pControl);
  testDatasourceFree(pData);
  testCaseFinish(rc);
  *pRc = rc;
}

static char *getName4(const char *zSystem, Datatest4 *pTest){
  char *zRet;
  char *zData;
  zData = testDatasourceName(&pTest->defn);
  zRet = testMallocPrintf("data4.%s.%s.%d.%d.%d", 
      zSystem, zData, pTest->nRec, pTest->nRepeat, pTest->bReopen
  );
  testFree(zData);
  return zRet;
}

void test_data_4(
  const char *zSystem,            /* Database system name */
  const char *zPattern,           /* Run test cases that match this pattern */
  int *pRc                        /* IN/OUT: Error code */
){
  Datatest4 aTest[] = {
      /* defn,                                 nRec, nRepeat, bReopen */
    { {DATA_RANDOM,     20,25,     500,600}, 10000,      10,       0   },
    { {DATA_RANDOM,     20,25,     500,600}, 10000,      10,       1   },
  };

  int i;

  for(i=0; *pRc==LSM_OK && i<ArraySize(aTest); i++){
    char *zName = getName4(zSystem, &aTest[i]);
    if( testCaseBegin(pRc, zPattern, "%s", zName) ){
      doDataTest4(zSystem, &aTest[i], pRc);
    }
    testFree(zName);
  }
}



Added ext/lsm1/lsm-test/lsmtest_bt.c.























































































































































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#include "lsmtest.h"
#include "bt.h"

int do_bt(int nArg, char **azArg){
  struct Option {
    const char *zName;
    int bPgno;
    int eOpt;
  } aOpt [] = { 
    { "dbhdr",          0, BT_INFO_HDRDUMP },
    { "filename",       0, BT_INFO_FILENAME },
    { "block_freelist", 0, BT_INFO_BLOCK_FREELIST },
    { "page_freelist",  0, BT_INFO_PAGE_FREELIST },
    { "filename",       0, BT_INFO_FILENAME },
    { "page",           1, BT_INFO_PAGEDUMP },
    { "page_ascii",     1, BT_INFO_PAGEDUMP_ASCII },
    { "leaks",          0, BT_INFO_PAGE_LEAKS },
    { 0, 0 } 
  };
  int iOpt;
  int rc;
  bt_info buf;
  char *zOpt;
  char *zFile;

  bt_db *db = 0;

  if( nArg<2 ){
    testPrintUsage("FILENAME OPTION ...");
    return -1;
  }
  zFile = azArg[0];
  zOpt = azArg[1];

  rc = testArgSelect(aOpt, "option", zOpt, &iOpt);
  if( rc!=0 ) return rc;
  if( nArg!=2+aOpt[iOpt].bPgno ){
    testPrintFUsage("FILENAME %s %s", zOpt, aOpt[iOpt].bPgno ? "PGNO" : "");
    return -4;
  }

  rc = sqlite4BtNew(sqlite4_env_default(), 0, &db);
  if( rc!=SQLITE4_OK ){
    testPrintError("sqlite4BtNew() failed: %d", rc);
    return -2;
  }
  rc = sqlite4BtOpen(db, zFile);
  if( rc!=SQLITE4_OK ){
    testPrintError("sqlite4BtOpen() failed: %d", rc);
    return -3;
  }

  buf.eType = aOpt[iOpt].eOpt;
  buf.pgno = 0;
  sqlite4_buffer_init(&buf.output, 0);

  if( aOpt[iOpt].bPgno ){
    buf.pgno = (u32)atoi(azArg[2]);
  }

  rc = sqlite4BtControl(db, BT_CONTROL_INFO, &buf);
  if( rc!=SQLITE4_OK ){
    testPrintError("sqlite4BtControl() failed: %d\n", rc);
    return -4;
  }

  printf("%s\n", (char*)buf.output.p);
  sqlite4_buffer_clear(&buf.output);
  return 0;
}




Added ext/lsm1/lsm-test/lsmtest_datasource.c.

































































































































































































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#include "lsmtest.h"

struct Datasource {
  int eType;

  int nMinKey;
  int nMaxKey;
  int nMinVal;
  int nMaxVal;

  char *aKey;
  char *aVal;
};

void testDatasourceEntry(
  Datasource *p, 
  int iData, 
  void **ppKey, int *pnKey,
  void **ppVal, int *pnVal
){
  assert( (ppKey==0)==(pnKey==0) );
  assert( (ppVal==0)==(pnVal==0) );

  if( ppKey ){
    int nKey = 0;
    switch( p->eType ){
      case TEST_DATASOURCE_RANDOM: {
        int nRange = (1 + p->nMaxKey - p->nMinKey);
        nKey = (int)( testPrngValue((u32)iData) % nRange ) + p->nMinKey; 
        testPrngString((u32)iData, p->aKey, nKey);
        break;
      }
      case TEST_DATASOURCE_SEQUENCE:
        nKey = sprintf(p->aKey, "%012d", iData);
        break;
    }
    *ppKey = p->aKey;
    *pnKey = nKey;
  }
  if( ppVal ){
    u32 nVal = testPrngValue((u32)iData)%(1+p->nMaxVal-p->nMinVal)+p->nMinVal;
    testPrngString((u32)~iData, p->aVal, (int)nVal);
    *ppVal = p->aVal;
    *pnVal = (int)nVal;
  }
}

void testDatasourceFree(Datasource *p){
  testFree(p);
}

/*
** Return a pointer to a nul-terminated string that corresponds to the
** contents of the datasource-definition passed as the first argument.
** The caller should eventually free the returned pointer using testFree().
*/
char *testDatasourceName(const DatasourceDefn *p){
  char *zRet;
  zRet = testMallocPrintf("%s.(%d-%d).(%d-%d)",
      (p->eType==TEST_DATASOURCE_SEQUENCE ? "seq" : "rnd"),
      p->nMinKey, p->nMaxKey,
      p->nMinVal, p->nMaxVal
  );
  return zRet;
}

Datasource *testDatasourceNew(const DatasourceDefn *pDefn){
  Datasource *p;
  int nMinKey; 
  int nMaxKey;
  int nMinVal;
  int nMaxVal; 

  if( pDefn->eType==TEST_DATASOURCE_SEQUENCE ){
    nMinKey = 128;
    nMaxKey = 128;
  }else{
    nMinKey = MAX(0, pDefn->nMinKey);
    nMaxKey = MAX(nMinKey, pDefn->nMaxKey);
  }
  nMinVal = MAX(0, pDefn->nMinVal);
  nMaxVal = MAX(nMinVal, pDefn->nMaxVal);

  p = (Datasource *)testMalloc(sizeof(Datasource) + nMaxKey + nMaxVal + 1);
  p->eType = pDefn->eType;
  p->nMinKey = nMinKey;
  p->nMinVal = nMinVal;
  p->nMaxKey = nMaxKey;
  p->nMaxVal = nMaxVal;
  
  p->aKey = (char *)&p[1];
  p->aVal = &p->aKey[nMaxKey];
  return p;
};

Added ext/lsm1/lsm-test/lsmtest_func.c.



































































































































































































































































































































































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#include "lsmtest.h"


int do_work(int nArg, char **azArg){
  struct Option {
    const char *zName;
  } aOpt [] = {
    { "-nmerge" },
    { "-nkb" },
    { 0 }
  };

  lsm_db *pDb;
  int rc;
  int i;
  const char *zDb;
  int nMerge = 1;
  int nKB = (1<<30);

  if( nArg==0 ) goto usage;
  zDb = azArg[nArg-1];
  for(i=0; i<(nArg-1); i++){
    int iSel;
    rc = testArgSelect(aOpt, "option", azArg[i], &iSel);
    if( rc ) return rc;
    switch( iSel ){
      case 0:
        i++;
        if( i==(nArg-1) ) goto usage;
        nMerge = atoi(azArg[i]);
        break;
      case 1:
        i++;
        if( i==(nArg-1) ) goto usage;
        nKB = atoi(azArg[i]);
        break;
    }
  }

  rc = lsm_new(0, &pDb);
  if( rc!=LSM_OK ){
    testPrintError("lsm_open(): rc=%d\n", rc);
  }else{
    rc = lsm_open(pDb, zDb);
    if( rc!=LSM_OK ){
      testPrintError("lsm_open(): rc=%d\n", rc);
    }else{
      int n = -1;
      lsm_config(pDb, LSM_CONFIG_BLOCK_SIZE, &n);
      n = n*2;
      lsm_config(pDb, LSM_CONFIG_AUTOCHECKPOINT, &n);

      rc = lsm_work(pDb, nMerge, nKB, 0);
      if( rc!=LSM_OK ){
        testPrintError("lsm_work(): rc=%d\n", rc);
      }
    }
  }
  if( rc==LSM_OK ){
    rc = lsm_checkpoint(pDb, 0);
  }

  lsm_close(pDb);
  return rc;

 usage:
  testPrintUsage("?-optimize? ?-n N? DATABASE");
  return -1;
}


/*
**   lsmtest show ?-config LSM-CONFIG? DATABASE ?COMMAND ?PGNO??
*/
int do_show(int nArg, char **azArg){
  lsm_db *pDb;
  int rc;
  const char *zDb;

  int eOpt = LSM_INFO_DB_STRUCTURE;
  unsigned int iPg = 0;
  int bConfig = 0;
  const char *zConfig = "";

  struct Option {
    const char *zName;
    int bConfig;
    int eOpt;
  } aOpt [] = { 
    { "array",       0, LSM_INFO_ARRAY_STRUCTURE },
    { "array-pages", 0, LSM_INFO_ARRAY_PAGES },
    { "blocksize",   1, LSM_CONFIG_BLOCK_SIZE },
    { "pagesize",    1, LSM_CONFIG_PAGE_SIZE },
    { "freelist",    0, LSM_INFO_FREELIST },
    { "page-ascii",  0, LSM_INFO_PAGE_ASCII_DUMP },
    { "page-hex",    0, LSM_INFO_PAGE_HEX_DUMP },
    { 0, 0 } 
  };

  char *z = 0; 
  int iDb = 0;                    /* Index of DATABASE in azArg[] */

  /* Check if there is a "-config" option: */
  if( nArg>2 && strlen(azArg[0])>1 
   && memcmp(azArg[0], "-config", strlen(azArg[0]))==0
  ){
    zConfig = azArg[1];
    iDb = 2;
  }
  if( nArg<(iDb+1) ) goto usage;

  if( nArg>(iDb+1) ){
    rc = testArgSelect(aOpt, "option", azArg[iDb+1], &eOpt);
    if( rc!=0 ) return rc;
    bConfig = aOpt[eOpt].bConfig;
    eOpt = aOpt[eOpt].eOpt;
    if( (bConfig==0 && eOpt==LSM_INFO_FREELIST)
     || (bConfig==1 && eOpt==LSM_CONFIG_BLOCK_SIZE)
     || (bConfig==1 && eOpt==LSM_CONFIG_PAGE_SIZE)
    ){
      if( nArg!=(iDb+2) ) goto usage;
    }else{
      if( nArg!=(iDb+3) ) goto usage;
      iPg = atoi(azArg[iDb+2]);
    }
  }
  zDb = azArg[iDb];

  rc = lsm_new(0, &pDb);
  tdb_lsm_configure(pDb, zConfig);
  if( rc!=LSM_OK ){
    testPrintError("lsm_new(): rc=%d\n", rc);
  }else{
    rc = lsm_open(pDb, zDb);
    if( rc!=LSM_OK ){
      testPrintError("lsm_open(): rc=%d\n", rc);
    }
  }

  if( rc==LSM_OK ){
    if( bConfig==0 ){
      switch( eOpt ){
        case LSM_INFO_DB_STRUCTURE:
        case LSM_INFO_FREELIST:
          rc = lsm_info(pDb, eOpt, &z);
          break;
        case LSM_INFO_ARRAY_STRUCTURE:
        case LSM_INFO_ARRAY_PAGES:
        case LSM_INFO_PAGE_ASCII_DUMP:
        case LSM_INFO_PAGE_HEX_DUMP:
          rc = lsm_info(pDb, eOpt, iPg, &z);
          break;
        default:
          assert( !"no chance" );
      }

      if( rc==LSM_OK ){
        printf("%s\n", z ? z : "");
        fflush(stdout);
      }
      lsm_free(lsm_get_env(pDb), z);
    }else{
      int iRes = -1;
      lsm_config(pDb, eOpt, &iRes);
      printf("%d\n", iRes);
      fflush(stdout);
    }
  }

  lsm_close(pDb);
  return rc;

 usage:
  testPrintUsage("DATABASE ?array|page-ascii|page-hex PGNO?");
  return -1;
}

Added ext/lsm1/lsm-test/lsmtest_io.c.

































































































































































































































































































































































































































































































































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/*
** SUMMARY
**
**   This file implements the 'io' subcommand of the test program. It is used
**   for testing the performance of various combinations of write() and fsync()
**   system calls. All operations occur on a single file, which may or may not
**   exist when a test is started.
**
**   A test consists of a series of commands. Each command is either a write
**   or an fsync. A write is specified as "<amount>@<offset>", where <amount>
**   is the amount of data written, and <offset> is the offset of the file
**   to write to. An <amount> or an <offset> is specified as an integer number
**   of bytes. Or, if postfixed with a "K", "M" or "G", an integer number of
**   KB, MB or GB, respectively. An fsync is simply "S". All commands are
**   case-insensitive.
**
**   Example test program:
**
**        2M@6M 1492K@4M S 4096@4K S
**
**   This program writes 2 MB of data starting at the offset 6MB offset of
**   the file, followed by 1492 KB of data written at the 4MB offset of the
**   file, followed by a call to fsync(), a write of 4KB of data at byte
**   offset 4096, and finally another call to fsync().
**
**   Commands may either be specified on the command line (one command per
**   command line argument) or read from stdin. Commands read from stdin
**   must be separated by white-space.
**
** COMMAND LINE INVOCATION
**
**   The sub-command implemented in this file must be invoked with at least
**   two arguments - the path to the file to write to and the page-size to
**   use for writing. If there are more than two arguments, then each
**   subsequent argument is assumed to be a test command. If there are exactly
**   two arguments, the test commands are read from stdin.
**
**   A write command does not result in a single call to system call write().
**   Instead, the specified region is written sequentially using one or
**   more calls to write(), each of which writes not more than one page of
**   data. For example, if the page-size is 4KB, the command "2M@6M" results
**   in 512 calls to write(), each of which writes 4KB of data.
**
** EXAMPLES
**
**   Two equivalent examples:
**
**     $ lsmtest io testfile.db 4KB 2M@6M 1492K@4M S 4096@4K S
**     3544K written in 129 ms
**     $ echo "2M@6M 1492K@4M S 4096@4K S" | lsmtest io testfile.db 4096 
**     3544K written in 127 ms
**
*/

#include "lsmtest.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifndef _WIN32
# include <unistd.h>
#endif
#include <ctype.h>

typedef struct IoContext IoContext;

struct IoContext {
  int fd;
  int nWrite;
};

/*
** As isspace(3)
*/
static int safe_isspace(char c){
  if( c&0x80) return 0;
  return isspace(c);
}

/*
** As isdigit(3)
*/
static int safe_isdigit(char c){
  if( c&0x80) return 0;
  return isdigit(c);
}

static i64 getNextSize(char *zIn, char **pzOut, int *pRc){
  i64 iRet = 0;
  if( *pRc==0 ){
    char *z = zIn;

    if( !safe_isdigit(*z) ){
      *pRc = 1;
      return 0;
    }

    /* Process digits */
    while( safe_isdigit(*z) ){
      iRet = iRet*10 + (*z - '0');
      z++;
    }

    /* Process suffix */
    switch( *z ){
      case 'k': case 'K':
        iRet = iRet * 1024;
        z++;
        break;

      case 'm': case 'M':
        iRet = iRet * 1024 * 1024;
        z++;
        break;

      case 'g': case 'G':
        iRet = iRet * 1024 * 1024 * 1024;
        z++;
        break;
    }

    if( pzOut ) *pzOut = z;
  }
  return iRet;
}

static int doOneCmd(
  IoContext *pCtx,
  u8 *aData,
  int pgsz,
  char *zCmd,
  char **pzOut
){
  char c;
  char *z = zCmd;

  while( safe_isspace(*z) ) z++;
  c = *z;

  if( c==0 ){
    if( pzOut ) *pzOut = z;
    return 0;
  }

  if( c=='s' || c=='S' ){
    if( pzOut ) *pzOut = &z[1];
    return fdatasync(pCtx->fd);
  }

  if( safe_isdigit(c) ){
    i64 iOff = 0;
    int nByte = 0;
    int rc = 0;
    int nPg;
    int iPg;

    nByte = getNextSize(z, &z, &rc);
    if( rc || *z!='@' ) goto bad_command;
    z++;
    iOff = getNextSize(z, &z, &rc);
    if( rc || (safe_isspace(*z)==0 && *z!='\0') ) goto bad_command;
    if( pzOut ) *pzOut = z;

    nPg = (nByte+pgsz-1) / pgsz;
    lseek(pCtx->fd, iOff, SEEK_SET);
    for(iPg=0; iPg<nPg; iPg++){
      write(pCtx->fd, aData, pgsz);
    }
    pCtx->nWrite += nByte/1024;

    return 0;
  }

 bad_command:
  testPrintError("unrecognized command: %s", zCmd);
  return 1;
}

static int readStdin(char **pzOut){
  int nAlloc = 128;
  char *zOut = 0;
  int nOut = 0;

  while( !feof(stdin) ){
    int nRead;

    nAlloc = nAlloc*2;
    zOut = realloc(zOut, nAlloc);
    nRead = fread(&zOut[nOut], 1, nAlloc-nOut-1, stdin);

    if( nRead==0 ) break;
    nOut += nRead;
    zOut[nOut] = '\0';
  }

  *pzOut = zOut;
  return 0;
}

int do_io(int nArg, char **azArg){
  IoContext ctx;
  int pgsz;
  char *zFile;
  char *zPgsz;
  int i;
  int rc = 0;

  char *zStdin = 0;
  char *z;

  u8 *aData;

  memset(&ctx, 0, sizeof(IoContext));
  if( nArg<2 ){
    testPrintUsage("FILE PGSZ ?CMD-1 ...?");
    return -1;
  }
  zFile = azArg[0];
  zPgsz = azArg[1];

  pgsz = getNextSize(zPgsz, 0, &rc);
  if( pgsz<=0 ){
    testPrintError("Ridiculous page size: %d", pgsz);
    return -1;
  }
  aData = malloc(pgsz);
  memset(aData, 0x77, pgsz);

  ctx.fd = open(zFile, O_RDWR|O_CREAT, 0644);
  if( ctx.fd<0 ){
    perror("open: ");
    return -1;
  }

  if( nArg==2 ){
    readStdin(&zStdin);
    testTimeInit();
    z = zStdin;
    while( *z && rc==0 ){
      rc = doOneCmd(&ctx, aData, pgsz, z, &z);
    }
  }else{
    testTimeInit();
    for(i=2; i<nArg; i++){
      rc = doOneCmd(&ctx, aData, pgsz, azArg[i], 0);
    }
  }

  printf("%dK written in %d ms\n", ctx.nWrite, testTimeGet());

  free(zStdin);
  close(ctx.fd);

  return 0;
}

Added ext/lsm1/lsm-test/lsmtest_main.c.























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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#include "stdarg.h"
#include "lsmtest.h"
#include "stdio.h"
#include "assert.h"
#include "string.h"
#include "stdlib.h"

#include <sqlite3.h>

#ifndef _WIN32
# include <unistd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>


void test_failed(){ 
  assert( 0 );
  return; 
}

#define testSetError(rc) testSetErrorFunc(rc, pRc, __FILE__, __LINE__)
static void testSetErrorFunc(int rc, int *pRc, const char *zFile, int iLine){
  if( rc ){
    *pRc = rc;
    fprintf(stderr, "FAILED (%s:%d) rc=%d ", zFile, iLine, rc);
    test_failed();
  }
}

static int lsm_memcmp(u8 *a, u8 *b, int c){
  int i;
  for(i=0; i<c; i++){
    if( a[i]!=b[i] ) return a[i] - b[i];
  }
  return 0;
}

/*
** A test utility function.
*/
void testFetch(
  TestDb *pDb,                    /* Database handle */
  void *pKey, int nKey,           /* Key to query database for */
  void *pVal, int nVal,           /* Expected value */
  int *pRc                        /* IN/OUT: Error code */
){
  if( *pRc==0 ){
    void *pDbVal;
    int nDbVal;
    int rc;

    static int nCall = 0; nCall++;

    rc = tdb_fetch(pDb, pKey, nKey, &pDbVal, &nDbVal);
    testSetError(rc);
    if( rc==0 && (nVal!=nDbVal || (nVal>0 && lsm_memcmp(pVal, pDbVal, nVal))) ){
      testSetError(1);
    }
  }
}

void testWrite(
  TestDb *pDb,                    /* Database handle */
  void *pKey, int nKey,           /* Key to query database for */
  void *pVal, int nVal,           /* Value to write */
  int *pRc                        /* IN/OUT: Error code */
){
  if( *pRc==0 ){
    int rc;
static int nCall = 0;
nCall++;
    rc = tdb_write(pDb, pKey, nKey, pVal, nVal);
    testSetError(rc);
  }
}
void testDelete(
  TestDb *pDb,                    /* Database handle */
  void *pKey, int nKey,           /* Key to query database for */
  int *pRc                        /* IN/OUT: Error code */
){
  if( *pRc==0 ){
    int rc;
    *pRc = rc = tdb_delete(pDb, pKey, nKey);
    testSetError(rc);
  }
}
void testDeleteRange(
  TestDb *pDb,                    /* Database handle */
  void *pKey1, int nKey1,
  void *pKey2, int nKey2,
  int *pRc                        /* IN/OUT: Error code */
){
  if( *pRc==0 ){
    int rc;
    *pRc = rc = tdb_delete_range(pDb, pKey1, nKey1, pKey2, nKey2);
    testSetError(rc);
  }
}

void testBegin(TestDb *pDb, int iTrans, int *pRc){
  if( *pRc==0 ){
    int rc;
    rc = tdb_begin(pDb, iTrans);
    testSetError(rc);
  }
}
void testCommit(TestDb *pDb, int iTrans, int *pRc){
  if( *pRc==0 ){
    int rc;
    rc = tdb_commit(pDb, iTrans);
    testSetError(rc);
  }
}
#if 0 /* unused */
static void testRollback(TestDb *pDb, int iTrans, int *pRc){
  if( *pRc==0 ){
    int rc;
    rc = tdb_rollback(pDb, iTrans);
    testSetError(rc);
  }
}
#endif

void testWriteStr(
  TestDb *pDb,                    /* Database handle */
  const char *zKey,               /* Key to query database for */
  const char *zVal,               /* Value to write */
  int *pRc                        /* IN/OUT: Error code */
){
  int nVal = (zVal ? strlen(zVal) : 0);
  testWrite(pDb, (void *)zKey, strlen(zKey), (void *)zVal, nVal, pRc);
}

#if 0 /* unused */
static void testDeleteStr(TestDb *pDb, const char *zKey, int *pRc){
  testDelete(pDb, (void *)zKey, strlen(zKey), pRc);
}
#endif
void testFetchStr(
  TestDb *pDb,                    /* Database handle */
  const char *zKey,               /* Key to query database for */
  const char *zVal,               /* Value to write */
  int *pRc                        /* IN/OUT: Error code */
){
  int nVal = (zVal ? strlen(zVal) : 0);
  testFetch(pDb, (void *)zKey, strlen(zKey), (void *)zVal, nVal, pRc);
}

void testFetchCompare(
  TestDb *pControl, 
  TestDb *pDb, 
  void *pKey, int nKey, 
  int *pRc
){
  int rc;
  void *pDbVal1;
  void *pDbVal2;
  int nDbVal1;
  int nDbVal2;

  static int nCall = 0;
  nCall++;

  rc = tdb_fetch(pControl, pKey, nKey, &pDbVal1, &nDbVal1);
  testSetError(rc);

  rc = tdb_fetch(pDb, pKey, nKey, &pDbVal2, &nDbVal2);
  testSetError(rc);

  if( *pRc==0 
   && (nDbVal1!=nDbVal2 || (nDbVal1>0 && memcmp(pDbVal1, pDbVal2, nDbVal1)))
  ){
    testSetError(1);
  }
}

typedef struct ScanResult ScanResult;
struct ScanResult {
  TestDb *pDb;

  int nRow;
  u32 cksum1;
  u32 cksum2;
  void *pKey1; int nKey1;
  void *pKey2; int nKey2;

  int bReverse;
  int nPrevKey;
  u8 aPrevKey[256];
};

static int keyCompare(void *pKey1, int nKey1, void *pKey2, int nKey2){
  int res;
  res = memcmp(pKey1, pKey2, MIN(nKey1, nKey2));
  if( res==0 ){
    res = nKey1 - nKey2;
  }
  return res;
}

int test_scan_debug = 0;

static void scanCompareCb(
  void *pCtx, 
  void *pKey, int nKey,
  void *pVal, int nVal
){
  ScanResult *p = (ScanResult *)pCtx;
  u8 *aKey = (u8 *)pKey;
  u8 *aVal = (u8 *)pVal;
  int i;

  if( test_scan_debug ){
    printf("%d: %.*s\n", p->nRow, nKey, (char *)pKey);
    fflush(stdout);
  }
#if 0
  if( test_scan_debug ) printf("%.20s\n", (char *)pVal);
#endif

#if 0
  /* Check tdb_fetch() matches */
  int rc = 0;
  testFetch(p->pDb, pKey, nKey, pVal, nVal, &rc);
  assert( rc==0 );
#endif

  /* Update the checksum data */
  p->nRow++;
  for(i=0; i<nKey; i++){
    p->cksum1 += ((int)aKey[i] << (i&0x0F));
    p->cksum2 += p->cksum1;
  }
  for(i=0; i<nVal; i++){
    p->cksum1 += ((int)aVal[i] << (i&0x0F));
    p->cksum2 += p->cksum1;
  }

  /* Check that the delivered row is not out of order. */
  if( nKey<(int)sizeof(p->aPrevKey) ){
    if( p->nPrevKey ){
      int res = keyCompare(p->aPrevKey, p->nPrevKey, pKey, nKey);
      if( (res<0 && p->bReverse) || (res>0 && p->bReverse==0) ){
        testPrintError("Returned key out of order at %s:%d\n", 
            __FILE__, __LINE__
        );
      }
    }

    p->nPrevKey = nKey;
    memcpy(p->aPrevKey, pKey, MIN(p->nPrevKey, nKey));
  }

  /* Check that the delivered row is within range. */
  if( p->pKey1 && (
      (memcmp(p->pKey1, pKey, MIN(p->nKey1, nKey))>0)
   || (memcmp(p->pKey1, pKey, MIN(p->nKey1, nKey))==0 && p->nKey1>nKey)
  )){
    testPrintError("Returned key too small at %s:%d\n", __FILE__, __LINE__);
  }
  if( p->pKey2 && (
      (memcmp(p->pKey2, pKey, MIN(p->nKey2, nKey))<0)
   || (memcmp(p->pKey2, pKey, MIN(p->nKey2, nKey))==0 && p->nKey2<nKey)
  )){
    testPrintError("Returned key too large at %s:%d\n", __FILE__, __LINE__);
  }

}

/*
** Scan the contents of the two databases. Check that they match.
*/
void testScanCompare(
  TestDb *pDb1,                   /* Control (trusted) database */
  TestDb *pDb2,                   /* Database being tested */
  int bReverse,
  void *pKey1, int nKey1, 
  void *pKey2, int nKey2, 
  int *pRc
){
  static int nCall = 0; nCall++;
  if( *pRc==0 ){
    ScanResult res1;
    ScanResult res2;
    void *pRes1 = (void *)&res1;
    void *pRes2 = (void *)&res2;

    memset(&res1, 0, sizeof(ScanResult));
    memset(&res2, 0, sizeof(ScanResult));

    res1.pDb = pDb1;
    res1.nKey1 = nKey1; res1.pKey1 = pKey1;
    res1.nKey2 = nKey2; res1.pKey2 = pKey2;
    res1.bReverse = bReverse;
    res2.pDb = pDb2;
    res2.nKey1 = nKey1; res2.pKey1 = pKey1;
    res2.nKey2 = nKey2; res2.pKey2 = pKey2;
    res2.bReverse = bReverse;

    tdb_scan(pDb1, pRes1, bReverse, pKey1, nKey1, pKey2, nKey2, scanCompareCb);
if( test_scan_debug ) printf("\n\n\n");
    tdb_scan(pDb2, pRes2, bReverse, pKey1, nKey1, pKey2, nKey2, scanCompareCb);
if( test_scan_debug ) printf("\n\n\n");

    if( res1.nRow!=res2.nRow 
     || res1.cksum1!=res2.cksum1 
     || res1.cksum2!=res2.cksum2
    ){
      printf("expected: %d %X %X\n", res1.nRow, res1.cksum1, res1.cksum2);
      printf("got:      %d %X %X\n", res2.nRow, res2.cksum1, res2.cksum2);
      testSetError(1);
      *pRc = 1;
    }
  }
}

void testClose(TestDb **ppDb){
  tdb_close(*ppDb);
  *ppDb = 0;
}

TestDb *testOpen(const char *zSystem, int bClear, int *pRc){
  TestDb *pDb = 0;
  if( *pRc==0 ){
    int rc;
    rc = tdb_open(zSystem, 0, bClear, &pDb);
    if( rc!=0 ){
      testSetError(rc);
      *pRc = rc;
    }
  }
  return pDb;
}

void testReopen(TestDb **ppDb, int *pRc){
  if( *pRc==0 ){
    const char *zLib;
    zLib = tdb_library_name(*ppDb);
    testClose(ppDb);
    *pRc = tdb_open(zLib, 0, 0, ppDb);
  }
}


#if 0 /* unused */
static void testSystemSelect(const char *zSys, int *piSel, int *pRc){
  if( *pRc==0 ){
    struct SysName { const char *zName; } *aName;
    int nSys;
    int i;

    for(nSys=0; tdb_system_name(nSys); nSys++);
    aName = malloc(sizeof(struct SysName) * (nSys+1));
    for(i=0; i<=nSys; i++){
      aName[i].zName = tdb_system_name(i);
    }

    *pRc = testArgSelect(aName, "db", zSys, piSel);
    free(aName);
  }
}
#endif

char *testMallocVPrintf(const char *zFormat, va_list ap){
  int nByte;
  va_list copy;
  char *zRet;

  __va_copy(copy, ap);
  nByte = vsnprintf(0, 0, zFormat, copy);
  va_end(copy);

  assert( nByte>=0 );
  zRet = (char *)testMalloc(nByte+1);
  vsnprintf(zRet, nByte+1, zFormat, ap);
  return zRet;
}

char *testMallocPrintf(const char *zFormat, ...){
  va_list ap;
  char *zRet;

  va_start(ap, zFormat);
  zRet = testMallocVPrintf(zFormat, ap);
  va_end(ap);

  return zRet;
}


/*
** A wrapper around malloc(3).
**
** This function should be used for all allocations made by test procedures.
** It has the following properties:
**
**   * Test code may assume that allocations may not fail.
**   * Returned memory is always zeroed.
**
** Allocations made using testMalloc() should be freed using testFree().
*/
void *testMalloc(int n){
  u8 *p = (u8*)malloc(n + 8);
  memset(p, 0, n+8);
  *(int*)p = n;
  return (void*)&p[8];
}

void *testMallocCopy(void *pCopy, int nByte){
  void *pRet = testMalloc(nByte);
  memcpy(pRet, pCopy, nByte);
  return pRet;
}

void *testRealloc(void *ptr, int n){
  if( ptr ){
    u8 *p = (u8*)ptr - 8;
    int nOrig =  *(int*)p;
    p = (u8*)realloc(p, n+8);
    if( nOrig<n ){
      memset(&p[8+nOrig], 0, n-nOrig);
    }
    *(int*)p = n;
    return (void*)&p[8];
  }
  return testMalloc(n);
}

/*
** Free an allocation made by an earlier call to testMalloc().
*/
void testFree(void *ptr){
  if( ptr ){
    u8 *p = (u8*)ptr - 8;
    memset(p, 0x55, *(int*)p + 8);
    free(p);
  }
}

/*
** String zPattern contains a glob pattern. Return true if zStr matches 
** the pattern, or false if it does not.
*/
int testGlobMatch(const char *zPattern, const char *zStr){
  int i = 0;
  int j = 0;

  while( zPattern[i] ){
    char p = zPattern[i];

    if( p=='*' || p=='%' ){
      do {
        if( testGlobMatch(&zPattern[i+1], &zStr[j]) ) return 1;
      }while( zStr[j++] );
      return 0;
    }

    if( zStr[j]==0 || (p!='?' && p!=zStr[j]) ){
      /* Match failed. */
      return 0;
    }

    j++;
    i++;
  }

  return (zPattern[i]==0 && zStr[j]==0);
}

/* 
** End of test utilities 
**************************************************************************/

int do_test(int nArg, char **azArg){
  int j;
  int rc;
  int nFail = 0;
  const char *zPattern = 0;

  if( nArg>1 ){
    testPrintError("Usage: test ?PATTERN?\n");
    return 1;
  }
  if( nArg==1 ){
    zPattern = azArg[0];
  }

  for(j=0; tdb_system_name(j); j++){
    rc = 0;

    test_data_1(tdb_system_name(j), zPattern, &rc);
    test_data_2(tdb_system_name(j), zPattern, &rc);
    test_data_3(tdb_system_name(j), zPattern, &rc);
    test_data_4(tdb_system_name(j), zPattern, &rc);
    test_rollback(tdb_system_name(j), zPattern, &rc);
    test_mc(tdb_system_name(j), zPattern, &rc);
    test_mt(tdb_system_name(j), zPattern, &rc);

    if( rc ) nFail++;
  }

  rc = 0;
  test_oom(zPattern, &rc);
  if( rc ) nFail++;

  rc = 0;
  test_api(zPattern, &rc);
  if( rc ) nFail++;

  rc = 0;
  do_crash_test(zPattern, &rc);
  if( rc ) nFail++;

  rc = 0;
  do_writer_crash_test(zPattern, &rc);
  if( rc ) nFail++;

  return (nFail!=0);
}

static lsm_db *configure_lsm_db(TestDb *pDb){
  lsm_db *pLsm;
  pLsm = tdb_lsm(pDb);
  if( pLsm ){
    tdb_lsm_config_str(pDb, "mmap=1 autowork=1 automerge=4 worker_automerge=4");
  }
  return pLsm;
}

typedef struct WriteHookEvent WriteHookEvent;
struct WriteHookEvent {
  i64 iOff;
  int nData;
  int nUs;
};
WriteHookEvent prev = {0, 0, 0};

static void flushPrev(FILE *pOut){
  if( prev.nData ){
    fprintf(pOut, "w %s %lld %d %d\n", "d", prev.iOff, prev.nData, prev.nUs);
    prev.nData = 0;
  }
}

#if 0 /* unused */
static void do_speed_write_hook2(
  void *pCtx,
  int bLog,
  i64 iOff,
  int nData,
  int nUs
){
  FILE *pOut = (FILE *)pCtx;
  if( bLog ) return;

  if( prev.nData && nData && iOff==prev.iOff+prev.nData ){
    prev.nData += nData;
    prev.nUs += nUs;
  }else{
    flushPrev(pOut);
    if( nData==0 ){
      fprintf(pOut, "s %s 0 0 %d\n", (bLog ? "l" : "d"), nUs);
    }else{
      prev.iOff = iOff;
      prev.nData = nData;
      prev.nUs = nUs;
    }
  }
}
#endif

#define ST_REPEAT  0
#define ST_WRITE   1
#define ST_PAUSE   2
#define ST_FETCH   3
#define ST_SCAN    4
#define ST_NSCAN   5
#define ST_KEYSIZE 6
#define ST_VALSIZE 7
#define ST_TRANS   8


static void print_speed_test_help(){
  printf(
"\n"
"Repeat the following $repeat times:\n"
"  1. Insert $write key-value pairs. One transaction for each write op.\n"
"  2. Pause for $pause ms.\n"
"  3. Perform $fetch queries on the database.\n"
"\n"
"  Keys are $keysize bytes in size. Values are $valsize bytes in size\n"
"  Both keys and values are pseudo-randomly generated\n"
"\n"
"Options are:\n"
"  -repeat  $repeat                 (default value 10)\n"
"  -write   $write                  (default value 10000)\n"
"  -pause   $pause                  (default value 0)\n"
"  -fetch   $fetch                  (default value 0)\n"
"  -keysize $keysize                (default value 12)\n"
"  -valsize $valsize                (default value 100)\n"
"  -system  $system                 (default value \"lsm\")\n"
"  -trans   $trans                  (default value 0)\n"
"\n"
);
}

int do_speed_test2(int nArg, char **azArg){
  struct Option {
    const char *zOpt;
    int eVal;
    int iDefault;
  } aOpt[] = {
    { "-repeat",  ST_REPEAT,    10},
    { "-write",   ST_WRITE,  10000},
    { "-pause",   ST_PAUSE,      0},
    { "-fetch",   ST_FETCH,      0},
    { "-scan",    ST_SCAN,       0},
    { "-nscan",   ST_NSCAN,      0},
    { "-keysize", ST_KEYSIZE,   12},
    { "-valsize", ST_VALSIZE,  100},
    { "-trans",   ST_TRANS,      0},
    { "-system",  -1,            0},
    { "help",     -2,            0},
    {0, 0, 0}
  };
  int i;
  int aParam[9];
  int rc = 0;
  int bReadonly = 0;
  int nContent = 0;

  TestDb *pDb;
  Datasource *pData;
  DatasourceDefn defn = { TEST_DATASOURCE_RANDOM, 0, 0, 0, 0 };
  char *zSystem = "";
  int bLsm = 1;
  FILE *pLog = 0;

#ifdef NDEBUG
  /* If NDEBUG is defined, disable the dynamic memory related checks in
  ** lsmtest_mem.c. They slow things down.  */
  testMallocUninstall(tdb_lsm_env());
#endif

  /* Initialize aParam[] with default values. */
  for(i=0; i<ArraySize(aOpt); i++){
    if( aOpt[i].zOpt ) aParam[aOpt[i].eVal] = aOpt[i].iDefault;
  }

  /* Process the command line switches. */
  for(i=0; i<nArg; i+=2){
    int iSel;
    rc = testArgSelect(aOpt, "switch", azArg[i], &iSel);
    if( rc ){
      return rc;
    }
    if( aOpt[iSel].eVal==-2 ){
      print_speed_test_help();
      return 0;
    }
    if( i+1==nArg ){
      testPrintError("option %s requires an argument\n", aOpt[iSel].zOpt);
      return 1;
    }
    if( aOpt[iSel].eVal>=0 ){
      aParam[aOpt[iSel].eVal] = atoi(azArg[i+1]);
    }else{
      zSystem = azArg[i+1];
      bLsm = 0;
#if 0
      for(j=0; zSystem[j]; j++){
        if( zSystem[j]=='=' ) bLsm = 1;
      }
#endif
    }
  }
  
  printf("#");
  for(i=0; i<ArraySize(aOpt); i++){
    if( aOpt[i].zOpt ){
      if( aOpt[i].eVal>=0 ){
        printf(" %s=%d", &aOpt[i].zOpt[1], aParam[aOpt[i].eVal]);
      }else if( aOpt[i].eVal==-1 ){
        printf(" %s=\"%s\"", &aOpt[i].zOpt[1], zSystem);
      }
    }
  }
  printf("\n");

  defn.nMinKey = defn.nMaxKey = aParam[ST_KEYSIZE];
  defn.nMinVal = defn.nMaxVal = aParam[ST_VALSIZE];
  pData = testDatasourceNew(&defn);

  if( aParam[ST_WRITE]==0 ){
    bReadonly = 1;
  }

  if( bLsm ){
    rc = tdb_lsm_open(zSystem, "testdb.lsm", !bReadonly, &pDb);
  }else{
    pDb = testOpen(zSystem, !bReadonly, &rc);
  }
  if( rc!=0 ) return rc;
  if( bReadonly ){
    nContent = testCountDatabase(pDb);
  }

#if 0
  pLog = fopen("/tmp/speed.log", "w");
  tdb_lsm_write_hook(pDb, do_speed_write_hook2, (void *)pLog);
#endif

  for(i=0; i<aParam[ST_REPEAT] && rc==0; i++){
    int msWrite, msFetch;
    int iFetch;
    int nWrite = aParam[ST_WRITE];

    if( bReadonly ){
      msWrite = 0;
    }else{
      testTimeInit();

      if( aParam[ST_TRANS] ) testBegin(pDb, 2, &rc);
      testWriteDatasourceRange(pDb, pData, i*nWrite, nWrite, &rc);
      if( aParam[ST_TRANS] ) testCommit(pDb, 0, &rc);

      msWrite = testTimeGet();
      nContent += nWrite;
    }

    if( aParam[ST_PAUSE] ){
      if( aParam[ST_PAUSE]/1000 ) sleep(aParam[ST_PAUSE]/1000);
      if( aParam[ST_PAUSE]%1000 ) usleep(1000 * (aParam[ST_PAUSE]%1000));
    }

    if( aParam[ST_FETCH] ){
      testTimeInit();
      if( aParam[ST_TRANS] ) testBegin(pDb, 1, &rc);
      for(iFetch=0; iFetch<aParam[ST_FETCH]; iFetch++){
        int iKey = testPrngValue(i*nWrite+iFetch) % nContent;
#ifndef NDEBUG
        testDatasourceFetch(pDb, pData, iKey, &rc);
#else
        void *pKey; int nKey;           /* Database key to query for */
        void *pVal; int nVal;           /* Result of query */

        testDatasourceEntry(pData, iKey, &pKey, &nKey, 0, 0);
        rc = tdb_fetch(pDb, pKey, nKey, &pVal, &nVal);
        if( rc==0 && nVal<0 ) rc = 1;
        if( rc ) break;
#endif
      }
      if( aParam[ST_TRANS] ) testCommit(pDb, 0, &rc);
      msFetch = testTimeGet();
    }else{
      msFetch = 0;
    }

    if( i==(aParam[ST_REPEAT]-1) ){
      testTimeInit();
      testClose(&pDb);
      msWrite += testTimeGet();
    }

    printf("%d %d %d\n", i, msWrite, msFetch);
    fflush(stdout);
  }

  testClose(&pDb);
  testDatasourceFree(pData);

  if( pLog ){
    flushPrev(pLog);
    fclose(pLog);
  }
  return rc;
}

int do_speed_tests(int nArg, char **azArg){

  struct DbSystem {
    const char *zLibrary;
    const char *zColor;
  } aSys[] = {
    { "sqlite3",      "black" },
    { "leveldb",      "blue" },
    { "lsm",          "red" },
    { "lsm_mt2",      "orange" },
    { "lsm_mt3",      "purple" },
    { "kyotocabinet", "green" },
    {0, 0}
  };

  int i;
  int j;
  int rc;
  int nSleep = 0;                 /* ms of rest allowed between INSERT tests */
  int nRow = 0;                   /* Number of rows to insert into database */
  int nStep;                      /* Measure INSERT time after this many rows */
  int nSelStep;                   /* Measure SELECT time after this many rows */
  int nSelTest;                   /* Number of SELECTs to run for timing */
  int doReadTest = 1;
  int doWriteTest = 1;

  int *aTime;                     /* INSERT timing data */
  int *aWrite;                    /* Writes per nStep inserts */
  int *aSelTime;                  /* SELECT timing data */
  int isFirst = 1;
  int bSleep = 0;

  /* File to write gnuplot script to. */
  const char *zOut = "lsmtest_speed.gnuplot";

  u32 sys_mask = 0;

  testMallocUninstall(tdb_lsm_env());

  for(i=0; i<nArg; i++){
    struct Opt { 
      const char *zOpt; 
      int isSwitch;
    } aOpt[] = {
      { "sqlite3" , 0},
      { "leveldb" , 0},
      { "lsm" , 0},
      { "lsm_mt2" , 0},
      { "lsm_mt3" , 0},
      { "kyotocabinet" , 0},
      { "-rows"     , 1},
      { "-sleep"    , 2},
      { "-testmode" , 3},
      { "-out"      , 4},
      { 0, 0}
    };
    int iSel;

    rc = testArgSelect(aOpt, "argument", azArg[i], &iSel);
    if( rc ) return rc;

    if( aOpt[iSel].isSwitch ){
      i++;

      if( i>=nArg ){
        testPrintError("option %s requires an argument\n", aOpt[iSel].zOpt);
        return 1;
      }
      if( aOpt[iSel].isSwitch==1 ){
        nRow = atoi(azArg[i]);
      }
      if( aOpt[iSel].isSwitch==2 ){
        nSleep = atoi(azArg[i]);
      }
      if( aOpt[iSel].isSwitch==3 ){
        struct Mode {
          const char *zMode;
          int doReadTest;
          int doWriteTest;
        } aMode[] = {{"ro", 1, 0} , {"rw", 1, 1}, {"wo", 0, 1}, {0, 0, 0}};
        int iMode;
        rc = testArgSelect(aMode, "option", azArg[i], &iMode);
        if( rc ) return rc;
        doReadTest = aMode[iMode].doReadTest;
        doWriteTest = aMode[iMode].doWriteTest;
      }
      if( aOpt[iSel].isSwitch==4 ){
        /* The "-out FILE" switch. This option is used to specify a file to
        ** write the gnuplot script to. */
        zOut = azArg[i];
      }
    }else{
      /* A db name */
      rc = testArgSelect(aOpt, "system", azArg[i], &iSel);
      if( rc ) return rc;
      sys_mask |= (1<<iSel);
    }
  }

  if( sys_mask==0 ) sys_mask = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3);
  nRow = MAX(nRow, 100000);
  nStep = nRow/100;
  nSelStep = nRow/10;
  nSelTest = (nSelStep > 100000) ? 100000 : nSelStep;

  aTime = malloc(sizeof(int) * ArraySize(aSys) * nRow/nStep);
  aWrite = malloc(sizeof(int) * nRow/nStep);
  aSelTime = malloc(sizeof(int) * ArraySize(aSys) * nRow/nSelStep);

  /* This loop collects the INSERT speed data. */
  if( doWriteTest ){
    printf("Writing output to file \"%s\".\n",  zOut);

    for(j=0; aSys[j].zLibrary; j++){
      FILE *pLog = 0;
      TestDb *pDb;                  /* Database being tested */
      lsm_db *pLsm;
      int iDot = 0;
  
      if( ((1<<j)&sys_mask)==0 ) continue;
      if( bSleep && nSleep ) sqlite3_sleep(nSleep);
      bSleep = 1;

      testCaseBegin(&rc, 0, "speed.insert.%s", aSys[j].zLibrary);

      rc = tdb_open(aSys[j].zLibrary, 0, 1, &pDb);
      if( rc ) return rc;

      pLsm = configure_lsm_db(pDb);
#if 0
      pLog = fopen("/tmp/speed.log", "w");
      tdb_lsm_write_hook(pDb, do_speed_write_hook2, (void *)pLog);
#endif
  
      testTimeInit();
      for(i=0; i<nRow; i+=nStep){
        int iStep;
        int nWrite1, nWrite2;
        testCaseProgress(i, nRow, testCaseNDot(), &iDot);
        if( pLsm ) lsm_info(pLsm, LSM_INFO_NWRITE, &nWrite1);
        for(iStep=0; iStep<nStep; iStep++){
          u32 aKey[4];                  /* 16-byte key */
          u32 aVal[25];                 /* 100 byte value */
          testPrngArray(i+iStep, aKey, ArraySize(aKey));
          testPrngArray(i+iStep, aVal, ArraySize(aVal));
          rc = tdb_write(pDb, aKey, sizeof(aKey), aVal, sizeof(aVal));
        }
        aTime[(j*nRow+i)/nStep] = testTimeGet();
        if( pLsm ) lsm_info(pLsm, LSM_INFO_NWRITE, &nWrite2);
        aWrite[i/nStep] = nWrite2 - nWrite1;
      }

      tdb_close(pDb);
      if( pLog ) fclose(pLog);
      testCaseFinish(rc);
    }
  }

  /* This loop collects the SELECT speed data. */
  if( doReadTest ){
    for(j=0; aSys[j].zLibrary; j++){
      int iDot = 0;
      TestDb *pDb;                  /* Database being tested */

      if( ((1<<j)&sys_mask)==0 ) continue;
      if( bSleep && nSleep ) sqlite3_sleep(nSleep);
      bSleep = 1;

      testCaseBegin(&rc, 0, "speed.select.%s", aSys[j].zLibrary);

      if( doWriteTest ){
        rc = tdb_open(aSys[j].zLibrary, 0, 1, &pDb);
        if( rc ) return rc;
        configure_lsm_db(pDb);

        for(i=0; i<nRow; i+=nSelStep){
          int iStep;
          int iSel;
          testCaseProgress(i, nRow, testCaseNDot(), &iDot);
          for(iStep=0; iStep<nSelStep; iStep++){
            u32 aKey[4];                  /* 16-byte key */
            u32 aVal[25];                 /* 100 byte value */
            testPrngArray(i+iStep, aKey, ArraySize(aKey));
            testPrngArray(i+iStep, aVal, ArraySize(aVal));
            rc = tdb_write(pDb, aKey, sizeof(aKey), aVal, sizeof(aVal));
          }
    
          testTimeInit();
          for(iSel=0; iSel<nSelTest; iSel++){
            void *pDummy;
            int nDummy;
            u32 iKey;
            u32 aKey[4];                  /* 16-byte key */
    
            iKey = testPrngValue(iSel) % (i+nSelStep);
            testPrngArray(iKey, aKey, ArraySize(aKey));
            rc = tdb_fetch(pDb, aKey, sizeof(aKey), &pDummy, &nDummy);
          }
          aSelTime[(j*nRow+i)/nSelStep] = testTimeGet();
          tdb_fetch(pDb, 0, 0, 0, 0);
        }
      }else{
        int t;
        int iSel;

        rc = tdb_open(aSys[j].zLibrary, 0, 0, &pDb);
        configure_lsm_db(pDb);

        testTimeInit();
        for(iSel=0; rc==LSM_OK && iSel<nSelTest; iSel++){
          void *pDummy;
          int nDummy;
          u32 iKey;
          u32 aKey[4];                  /* 16-byte key */
#ifndef NDEBUG
          u32 aVal[25];                 /* 100 byte value */
#endif

          testCaseProgress(iSel, nSelTest, testCaseNDot(), &iDot);
    
          iKey = testPrngValue(iSel) % nRow;
          testPrngArray(iKey, aKey, ArraySize(aKey));
          rc = tdb_fetch(pDb, aKey, sizeof(aKey), &pDummy, &nDummy);

#ifndef NDEBUG
          testPrngArray(iKey, aVal, ArraySize(aVal));
          assert( nDummy==100 && memcmp(aVal, pDummy, 100)==0 );
#endif
        }
        if( rc!=LSM_OK ) return rc;

        t = testTimeGet();
        tdb_fetch(pDb, 0, 0, 0, 0);

        printf("%s: %d selects/second\n", 
            aSys[j].zLibrary, (int)((double)nSelTest*1000.0/t)
        );
      }

      tdb_close(pDb);
      testCaseFinish(rc);
    }
  }


  if( doWriteTest ){
    FILE *pOut = fopen(zOut, "w");
    if( !pOut ){
      printf("fopen(\"%s\", \"w\"): %s\n", zOut, strerror(errno));
      return 1;
    }

    fprintf(pOut, "set xlabel \"Rows Inserted\"\n");
    fprintf(pOut, "set ylabel \"Inserts per second\"\n");
    if( doReadTest ){
      fprintf(pOut, "set y2label \"Selects per second\"\n");
    }else if( sys_mask==(1<<2) ){
      fprintf(pOut, "set y2label \"Page writes per insert\"\n");
    }
    fprintf(pOut, "set yrange [0:*]\n");
    fprintf(pOut, "set y2range [0:*]\n");
    fprintf(pOut, "set xrange [%d:*]\n", MAX(nStep, nRow/20) );
    fprintf(pOut, "set ytics nomirror\n");
    fprintf(pOut, "set y2tics nomirror\n");
    fprintf(pOut, "set key box lw 0.01\n");
    fprintf(pOut, "plot ");
  
    for(j=0; aSys[j].zLibrary; j++){
      if( (1<<j)&sys_mask ){
        const char *zLib = aSys[j].zLibrary;
        fprintf(pOut, "%s\"-\" ti \"%s INSERT\" with lines lc rgb \"%s\" ", 
            (isFirst?"":", "), zLib, aSys[j].zColor
        );
        if( doReadTest ){
          fprintf(pOut, ", \"-\" ti \"%s SELECT\" "
                 "axis x1y2 with points lw 3 lc rgb \"%s\""
              , zLib, aSys[j].zColor
          );
        }
        isFirst = 0;
      }
    }

    assert( strcmp(aSys[2].zLibrary, "lsm")==0 );
    if( sys_mask==(1<<2) && !doReadTest ){
      fprintf(pOut, ", \"-\" ti \"lsm pages written\" "
        "axis x1y2 with boxes lw 1 lc rgb \"grey\""
      );
    }
  
    fprintf(pOut, "\n");
  
    for(j=0; aSys[j].zLibrary; j++){
      if( ((1<<j)&sys_mask)==0 ) continue;
      fprintf(pOut, "# Rows    Inserts per second\n");
      for(i=0; i<nRow; i+=nStep){
        int iTime = aTime[(j*nRow+i)/nStep];
        int ips = (int)((i+nStep)*1000.0 / (double)iTime);
        fprintf(pOut, "%d %d\n", i+nStep, ips);
      }
      fprintf(pOut, "end\n");
  
      if( doReadTest ){
        fprintf(pOut, "# Rows    Selects per second\n");
        for(i=0; i<nRow; i+=nSelStep){
          int sps = (int)(nSelTest*1000.0/(double)aSelTime[(j*nRow+i)/nSelStep]);
          fprintf(pOut, "%d %d\n", i+nSelStep, sps);
        }
        fprintf(pOut, "end\n");
      }else if( sys_mask==(1<<2) ){
        for(i=0; i<(nRow/nStep); i++){
          fprintf(pOut, "%d %f\n", i*nStep, (double)aWrite[i] / (double)nStep);
        }
        fprintf(pOut, "end\n");
      }
    }
  
    fprintf(pOut, "pause -1\n");
    fclose(pOut);
  }

  free(aTime);
  free(aSelTime);
  free(aWrite);
  testMallocInstall(tdb_lsm_env());
  return 0;
}

/*
** Usage: lsmtest random ?N?
**
** This command prints a sequence of zero or more numbers from the PRNG
** system to stdout. If the "N" argument is missing, values the first 10
** values (i=0, i=1, ... i=9) are printed. Otherwise, the first N.
**
** This was added to verify that the PRNG values do not change between
** runs of the lsmtest program.
*/
int do_random_tests(int nArg, char **azArg){
  int i;
  int nRand;
  if( nArg==0 ){
    nRand = 10;
  }else if( nArg==1 ){
    nRand = atoi(azArg[0]);
  }else{
    testPrintError("Usage: random ?N?\n");
    return -1;
  }
  for(i=0; i<nRand; i++){
    printf("0x%x\n", testPrngValue(i));
  }
  return 0;
}

static int testFormatSize(char *aBuf, int nBuf, i64 nByte){
  int res;
  if( nByte<(1<<10) ){
    res = snprintf(aBuf, nBuf, "%d byte", (int)nByte);
  }else if( nByte<(1<<20) ){
    res = snprintf(aBuf, nBuf, "%dK", (int)(nByte/(1<<10)));
  }else{
    res = snprintf(aBuf, nBuf, "%dM", (int)(nByte/(1<<20)));
  }
  return res;
}

static i64 testReadSize(char *z){
  int n = strlen(z);
  char c = z[n-1];
  i64 nMul = 1;

  switch( c ){
    case 'g': case 'G':
      nMul = (1<<30);
      break;

    case 'm': case 'M':
      nMul = (1<<20);
      break;

    case 'k': case 'K':
      nMul = (1<<10);
      break;

    default:
      nMul = 1;
  }

  return nMul * (i64)atoi(z);
} 

/*
** Usage: lsmtest writespeed FILESIZE BLOCKSIZE SYNCSIZE
*/
static int do_writer_test(int nArg, char **azArg){
  int nBlock;
  int nSize;
  int i;
  int fd;
  int ms;
  char aFilesize[32];
  char aBlockSize[32];

  char *aPage;
  int *aOrder;
  int nSync;

  i64 filesize;
  i64 blocksize;
  i64 syncsize;
  int nPage = 4096;

  /* How long to sleep before running a trial (in ms). */
#if 0
  const int nSleep = 10000;
#endif
  const int nSleep = 0;

  if( nArg!=3 ){
    testPrintUsage("FILESIZE BLOCKSIZE SYNCSIZE");
    return -1;
  }

  filesize = testReadSize(azArg[0]);
  blocksize = testReadSize(azArg[1]);
  syncsize = testReadSize(azArg[2]);

  nBlock = (int)(filesize / blocksize);
  nSize = (int)blocksize;
  nSync = (int)(syncsize / blocksize);

  aPage = (char *)malloc(4096);
  aOrder = (int *)malloc(nBlock * sizeof(int));
  for(i=0; i<nBlock; i++) aOrder[i] = i;
  for(i=0; i<(nBlock*25); i++){
    int tmp;
    u32 a = testPrngValue(i);
    u32 b = testPrngValue(a);
    a = a % nBlock;
    b = b % nBlock;
    tmp = aOrder[a];
    aOrder[a] = aOrder[b];
    aOrder[b] = tmp;
  }

  testFormatSize(aFilesize, sizeof(aFilesize), (i64)nBlock * (i64)nSize);
  testFormatSize(aBlockSize, sizeof(aFilesize), nSize);

  printf("Testing writing a %s file using %s blocks. ", aFilesize, aBlockSize);
  if( nSync==1 ){
    printf("Sync after each block.\n");
  }else{
    printf("Sync after each %d blocks.\n", nSync);
  }

  printf("Preparing file... ");
  fflush(stdout);
  unlink("writer.out");
  fd = open("writer.out", O_RDWR|O_CREAT, 0664);
  if( fd<0 ){
    testPrintError("open(): %d - %s\n", errno, strerror(errno));
    return -1;
  }
  testTimeInit();
  for(i=0; i<nBlock; i++){
    int iPg;
    memset(aPage, i&0xFF, nPage);
    for(iPg=0; iPg<(nSize/nPage); iPg++){
      write(fd, aPage, nPage);
    }
  }
  fsync(fd);
  printf("ok (%d ms)\n", testTimeGet());

  for(i=0; i<5; i++){
    int j;

    sqlite3_sleep(nSleep);
    printf("Now writing sequentially...  ");
    fflush(stdout);

    lseek(fd, 0, SEEK_SET);
    testTimeInit();
    for(j=0; j<nBlock; j++){
      int iPg;
      if( ((j+1)%nSync)==0 ) fdatasync(fd);
      memset(aPage, j&0xFF, nPage);
      for(iPg=0; iPg<(nSize/nPage); iPg++){
        write(fd, aPage, nPage);
      }
    }
    fdatasync(fd);
    ms = testTimeGet();
    printf("%d ms\n", ms);
    sqlite3_sleep(nSleep);
    printf("Now in an arbitrary order... ");

    fflush(stdout);
    testTimeInit();
    for(j=0; j<nBlock; j++){
      int iPg;
      if( ((j+1)%nSync)==0 ) fdatasync(fd);
      lseek(fd, aOrder[j]*nSize, SEEK_SET);
      memset(aPage, j&0xFF, nPage);
      for(iPg=0; iPg<(nSize/nPage); iPg++){
        write(fd, aPage, nPage);
      }
    }
    fdatasync(fd);
    ms = testTimeGet();
    printf("%d ms\n", ms);
  }

  close(fd);
  free(aPage);
  free(aOrder);

  return 0;
}

static void do_insert_work_hook(lsm_db *db, void *p){
  char *z = 0;
  lsm_info(db, LSM_INFO_DB_STRUCTURE, &z);
  if( z ){
    printf("%s\n", z);
    fflush(stdout);
    lsm_free(lsm_get_env(db), z);
  }

  unused_parameter(p);
}

typedef struct InsertWriteHook InsertWriteHook;
struct InsertWriteHook {
  FILE *pOut;
  int bLog;
  i64 iOff;
  int nData;
};

static void flushHook(InsertWriteHook *pHook){
  if( pHook->nData ){
    fprintf(pHook->pOut, "write %s %d %d\n", 
        (pHook->bLog ? "log" : "db"), (int)pHook->iOff, pHook->nData
    );
    pHook->nData = 0;
    fflush(pHook->pOut);
  }
}

static void do_insert_write_hook(
  void *pCtx,
  int bLog,
  i64 iOff,
  int nData,
  int nUs
){
  InsertWriteHook *pHook = (InsertWriteHook *)pCtx;
  if( bLog ) return;

  if( nData==0 ){
    flushHook(pHook);
    fprintf(pHook->pOut, "sync %s\n", (bLog ? "log" : "db"));
  }else if( pHook->nData 
         && bLog==pHook->bLog 
         && iOff==(pHook->iOff+pHook->nData) 
  ){
    pHook->nData += nData;
  }else{
    flushHook(pHook);
    pHook->bLog = bLog;
    pHook->iOff = iOff;
    pHook->nData = nData;
  }
}

static int do_replay(int nArg, char **azArg){
  char aBuf[4096];
  FILE *pInput;
  FILE *pClose = 0;
  const char *zDb;

  lsm_env *pEnv;
  lsm_file *pOut;
  int rc;

  if( nArg!=2 ){
    testPrintError("Usage: replay WRITELOG FILE\n");
    return 1;
  }

  if( strcmp(azArg[0], "-")==0 ){
    pInput = stdin;
  }else{
    pClose = pInput = fopen(azArg[0], "r");
  }
  zDb = azArg[1];
  pEnv = tdb_lsm_env();
  rc = pEnv->xOpen(pEnv, zDb, 0, &pOut);
  if( rc!=LSM_OK ) return rc;

  while( feof(pInput)==0 ){
    char zLine[80];
    fgets(zLine, sizeof(zLine)-1, pInput);
    zLine[sizeof(zLine)-1] = '\0';

    if( 0==memcmp("sync db", zLine, 7) ){
      rc = pEnv->xSync(pOut);
      if( rc!=0 ) break;
    }else{
      int iOff;
      int nData;
      int nMatch;
      nMatch = sscanf(zLine, "write db %d %d", &iOff, &nData);
      if( nMatch==2 ){
        int i;
        for(i=0; i<nData; i+=sizeof(aBuf)){
          memset(aBuf, i&0xFF, sizeof(aBuf));
          rc = pEnv->xWrite(pOut, iOff+i, aBuf, sizeof(aBuf));
          if( rc!=0 ) break;
        }
      }
    }
  }
  if( pClose ) fclose(pClose);
  pEnv->xClose(pOut);

  return rc;
}

static int do_insert(int nArg, char **azArg){
  const char *zDb = "lsm";
  TestDb *pDb = 0;
  int i;
  int rc;
  const int nRow = 1 * 1000 * 1000;

  DatasourceDefn defn = { TEST_DATASOURCE_RANDOM, 8, 15, 80, 150 };
  Datasource *pData = 0;

  if( nArg>1 ){
    testPrintError("Usage: insert ?DATABASE?\n");
    return 1;
  }
  if( nArg==1 ){ zDb = azArg[0]; }

  testMallocUninstall(tdb_lsm_env());
  for(i=0; zDb[i] && zDb[i]!='='; i++);
  if( zDb[i] ){
    rc = tdb_lsm_open(zDb, "testdb.lsm", 1, &pDb);
  }else{
    rc = tdb_open(zDb, 0, 1, &pDb);
  }

  if( rc!=0 ){
    testPrintError("Error opening db \"%s\": %d\n", zDb, rc);
  }else{
    InsertWriteHook hook;
    memset(&hook, 0, sizeof(hook));
    hook.pOut = fopen("writelog.txt", "w");

    pData = testDatasourceNew(&defn);
    tdb_lsm_config_work_hook(pDb, do_insert_work_hook, 0);
    tdb_lsm_write_hook(pDb, do_insert_write_hook, (void *)&hook);

    if( rc==0 ){
      for(i=0; i<nRow; i++){
        void *pKey; int nKey;     /* Database key to insert */
        void *pVal; int nVal;     /* Database value to insert */
        testDatasourceEntry(pData, i, &pKey, &nKey, &pVal, &nVal);
        tdb_write(pDb, pKey, nKey, pVal, nVal);
      }
    }

    testDatasourceFree(pData);
    tdb_close(pDb);
    flushHook(&hook);
    fclose(hook.pOut);
  }
  testMallocInstall(tdb_lsm_env());

  return rc;
}

static int st_do_show(int a, char **b)      { return do_show(a, b); }
static int st_do_work(int a, char **b)      { return do_work(a, b); }
static int st_do_io(int a, char **b)        { return do_io(a, b); }

#ifdef __linux__
#include <sys/time.h>
#include <sys/resource.h>

static void lsmtest_rusage_report(void){
  struct rusage r;
  memset(&r, 0, sizeof(r));

  getrusage(RUSAGE_SELF, &r);
  printf("# getrusage: { ru_maxrss %d ru_oublock %d ru_inblock %d }\n", 
      (int)r.ru_maxrss, (int)r.ru_oublock, (int)r.ru_inblock
  );
}
#else
static void lsmtest_rusage_report(void){
  /* no-op */
}
#endif

int main(int argc, char **argv){
  struct TestFunc {
    const char *zName;
    int bRusageReport;
    int (*xFunc)(int, char **);
  } aTest[] = {
    {"random",      1, do_random_tests},
    {"writespeed",  1, do_writer_test},
    {"io",          1, st_do_io},

    {"insert",      1, do_insert},
    {"replay",      1, do_replay},

    {"speed",       1, do_speed_tests},
    {"speed2",      1, do_speed_test2},
    {"show",        0, st_do_show},
    {"work",        1, st_do_work},
    {"test",        1, do_test},

    {0, 0}
  };
  int rc;                         /* Return Code */
  int iFunc;                      /* Index into aTest[] */

  int nLeakAlloc = 0;             /* Allocations leaked by lsm */
  int nLeakByte = 0;              /* Bytes leaked by lsm */

#ifdef LSM_DEBUG_MEM
  FILE *pReport = 0;              /* lsm malloc() report file */
  const char *zReport = "malloc.txt generated";
#else
  const char *zReport = "malloc.txt NOT generated";
#endif

  testMallocInstall(tdb_lsm_env());

  if( argc<2 ){
    testPrintError("Usage: %s sub-command ?args...?\n", argv[0]);
    return -1;
  }

  /* Initialize error reporting */
  testErrorInit(argc, argv);

  /* Initialize PRNG system */
  testPrngInit();

  rc = testArgSelect(aTest, "sub-command", argv[1], &iFunc);
  if( rc==0 ){
    rc = aTest[iFunc].xFunc(argc-2, &argv[2]);
  }

#ifdef LSM_DEBUG_MEM
  pReport = fopen("malloc.txt", "w");
  testMallocCheck(tdb_lsm_env(), &nLeakAlloc, &nLeakByte, pReport);
  fclose(pReport);
#else
  testMallocCheck(tdb_lsm_env(), &nLeakAlloc, &nLeakByte, 0);
#endif

  if( nLeakAlloc ){
    testPrintError("Leaked %d bytes in %d allocations (%s)\n", 
        nLeakByte, nLeakAlloc, zReport
    );
    if( rc==0 ) rc = -1;
  }
  testMallocUninstall(tdb_lsm_env());

  if( aTest[iFunc].bRusageReport ){
    lsmtest_rusage_report();
  }
  return rc;
}

Added ext/lsm1/lsm-test/lsmtest_mem.c.



















































































































































































































































































































































































































































































































































































































































































































































































































































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

#define ArraySize(x) ((int)(sizeof(x) / sizeof((x)[0])))

#define MIN(x,y) ((x)<(y) ? (x) : (y))

typedef unsigned int  u32;
typedef unsigned char u8;
typedef long long int i64;
typedef unsigned long long int u64;

#if defined(__GLIBC__) && defined(LSM_DEBUG_MEM)
  extern int backtrace(void**,int);
  extern void backtrace_symbols_fd(void*const*,int,int);
# define TM_BACKTRACE 12
#else
# define backtrace(A,B) 1
# define backtrace_symbols_fd(A,B,C)
#endif


typedef struct TmBlockHdr TmBlockHdr;
typedef struct TmAgg TmAgg;
typedef struct TmGlobal TmGlobal;

struct TmGlobal {
  /* Linked list of all currently outstanding allocations. And a table of
  ** all allocations, past and present, indexed by backtrace() info.  */
  TmBlockHdr *pFirst;
#ifdef TM_BACKTRACE
  TmAgg *aHash[10000];
#endif

  /* Underlying malloc/realloc/free functions */
  void *(*xMalloc)(int);          /* underlying malloc(3) function */
  void *(*xRealloc)(void *, int); /* underlying realloc(3) function */
  void (*xFree)(void *);          /* underlying free(3) function */

  /* Mutex to protect pFirst and aHash */
  void (*xEnterMutex)(TmGlobal*); /* Call this to enter the mutex */
  void (*xLeaveMutex)(TmGlobal*); /* Call this to leave mutex */
  void (*xDelMutex)(TmGlobal*);   /* Call this to delete mutex */
  void *pMutex;                   /* Mutex handle */

  void *xSaveMalloc;
  void *xSaveRealloc;
  void *xSaveFree;

  /* OOM injection scheduling. If nCountdown is greater than zero when a 
  ** malloc attempt is made, it is decremented. If this means nCountdown 
  ** transitions from 1 to 0, then the allocation fails. If bPersist is true 
  ** when this happens, nCountdown is then incremented back to 1 (so that the 
  ** next attempt fails too).  
  */
  int nCountdown;
  int bPersist;
  int bEnable;
  void (*xHook)(void *);
  void *pHookCtx;
};

struct TmBlockHdr {
  TmBlockHdr *pNext;
  TmBlockHdr *pPrev;
  int nByte;
#ifdef TM_BACKTRACE
  TmAgg *pAgg;
#endif
  u32 iForeGuard;
};

#ifdef TM_BACKTRACE
struct TmAgg {
  int nAlloc;                     /* Number of allocations at this path */
  int nByte;                      /* Total number of bytes allocated */
  int nOutAlloc;                  /* Number of outstanding allocations */
  int nOutByte;                   /* Number of outstanding bytes */
  void *aFrame[TM_BACKTRACE];     /* backtrace() output */
  TmAgg *pNext;                   /* Next object in hash-table collision */
};
#endif

#define FOREGUARD 0x80F5E153
#define REARGUARD 0xE4676B53
static const u32 rearguard = REARGUARD;

#define ROUND8(x) (((x)+7)&~7)

#define BLOCK_HDR_SIZE (ROUND8( sizeof(TmBlockHdr) ))

static void lsmtest_oom_error(void){
  static int nErr = 0;
  nErr++;
}

static void tmEnterMutex(TmGlobal *pTm){
  pTm->xEnterMutex(pTm);
}
static void tmLeaveMutex(TmGlobal *pTm){
  pTm->xLeaveMutex(pTm);
}

static void *tmMalloc(TmGlobal *pTm, int nByte){
  TmBlockHdr *pNew;               /* New allocation header block */
  u8 *pUser;                      /* Return value */
  int nReq;                       /* Total number of bytes requested */

  assert( sizeof(rearguard)==4 );
  nReq = BLOCK_HDR_SIZE + nByte + 4;
  pNew = (TmBlockHdr *)pTm->xMalloc(nReq);
  memset(pNew, 0, sizeof(TmBlockHdr));

  tmEnterMutex(pTm);
  assert( pTm->nCountdown>=0 );
  assert( pTm->bPersist==0 || pTm->bPersist==1 );

  if( pTm->bEnable && pTm->nCountdown==1 ){
    /* Simulate an OOM error. */
    lsmtest_oom_error();
    pTm->xFree(pNew);
    pTm->nCountdown = pTm->bPersist;
    if( pTm->xHook ) pTm->xHook(pTm->pHookCtx);
    pUser = 0;
  }else{
    if( pTm->bEnable && pTm->nCountdown ) pTm->nCountdown--;

    pNew->iForeGuard = FOREGUARD;
    pNew->nByte = nByte;
    pNew->pNext = pTm->pFirst;

    if( pTm->pFirst ){
      pTm->pFirst->pPrev = pNew;
    }
    pTm->pFirst = pNew;

    pUser = &((u8 *)pNew)[BLOCK_HDR_SIZE];
    memset(pUser, 0x56, nByte);
    memcpy(&pUser[nByte], &rearguard, 4);

#ifdef TM_BACKTRACE
    {
      TmAgg *pAgg;
      int i;
      u32 iHash = 0;
      void *aFrame[TM_BACKTRACE];
      memset(aFrame, 0, sizeof(aFrame));
      backtrace(aFrame, TM_BACKTRACE);

      for(i=0; i<ArraySize(aFrame); i++){
        iHash += (u64)(aFrame[i]) + (iHash<<3);
      }
      iHash = iHash % ArraySize(pTm->aHash);

      for(pAgg=pTm->aHash[iHash]; pAgg; pAgg=pAgg->pNext){
        if( memcmp(pAgg->aFrame, aFrame, sizeof(aFrame))==0 ) break;
      }
      if( !pAgg ){
        pAgg = (TmAgg *)pTm->xMalloc(sizeof(TmAgg));
        memset(pAgg, 0, sizeof(TmAgg));
        memcpy(pAgg->aFrame, aFrame, sizeof(aFrame));
        pAgg->pNext = pTm->aHash[iHash];
        pTm->aHash[iHash] = pAgg;
      }
      pAgg->nAlloc++;
      pAgg->nByte += nByte;
      pAgg->nOutAlloc++;
      pAgg->nOutByte += nByte;
      pNew->pAgg = pAgg;
    }
#endif
  }

  tmLeaveMutex(pTm);
  return pUser;
}

static void tmFree(TmGlobal *pTm, void *p){
  if( p ){
    TmBlockHdr *pHdr;
    u8 *pUser = (u8 *)p;

    tmEnterMutex(pTm);
    pHdr = (TmBlockHdr *)&pUser[BLOCK_HDR_SIZE * -1];
    assert( pHdr->iForeGuard==FOREGUARD );
    assert( 0==memcmp(&pUser[pHdr->nByte], &rearguard, 4) );

    if( pHdr->pPrev ){
      assert( pHdr->pPrev->pNext==pHdr );
      pHdr->pPrev->pNext = pHdr->pNext;
    }else{
      assert( pHdr==pTm->pFirst );
      pTm->pFirst = pHdr->pNext;
    }
    if( pHdr->pNext ){
      assert( pHdr->pNext->pPrev==pHdr );
      pHdr->pNext->pPrev = pHdr->pPrev;
    }

#ifdef TM_BACKTRACE
    pHdr->pAgg->nOutAlloc--;
    pHdr->pAgg->nOutByte -= pHdr->nByte;
#endif

    tmLeaveMutex(pTm);
    memset(pUser, 0x58, pHdr->nByte);
    memset(pHdr, 0x57, sizeof(TmBlockHdr));
    pTm->xFree(pHdr);
  }
}

static void *tmRealloc(TmGlobal *pTm, void *p, int nByte){
  void *pNew;

  pNew = tmMalloc(pTm, nByte);
  if( pNew && p ){
    TmBlockHdr *pHdr;
    u8 *pUser = (u8 *)p;
    pHdr = (TmBlockHdr *)&pUser[BLOCK_HDR_SIZE * -1];
    memcpy(pNew, p, MIN(nByte, pHdr->nByte));
    tmFree(pTm, p);
  }
  return pNew;
}

static void tmMallocOom(
  TmGlobal *pTm, 
  int nCountdown, 
  int bPersist,
  void (*xHook)(void *),
  void *pHookCtx
){
  assert( nCountdown>=0 );
  assert( bPersist==0 || bPersist==1 );
  pTm->nCountdown = nCountdown;
  pTm->bPersist = bPersist;
  pTm->xHook = xHook;
  pTm->pHookCtx = pHookCtx;
  pTm->bEnable = 1;
}

static void tmMallocOomEnable(
  TmGlobal *pTm, 
  int bEnable
){
  pTm->bEnable = bEnable;
}

static void tmMallocCheck(
  TmGlobal *pTm,
  int *pnLeakAlloc,
  int *pnLeakByte,
  FILE *pFile
){
  TmBlockHdr *pHdr;
  int nLeak = 0;
  int nByte = 0;

  if( pTm==0 ) return;

  for(pHdr=pTm->pFirst; pHdr; pHdr=pHdr->pNext){
    nLeak++; 
    nByte += pHdr->nByte;
  }
  if( pnLeakAlloc ) *pnLeakAlloc = nLeak;
  if( pnLeakByte ) *pnLeakByte = nByte;

#ifdef TM_BACKTRACE
  if( pFile ){
    int i;
    fprintf(pFile, "LEAKS\n");
    for(i=0; i<ArraySize(pTm->aHash); i++){
      TmAgg *pAgg;
      for(pAgg=pTm->aHash[i]; pAgg; pAgg=pAgg->pNext){
        if( pAgg->nOutAlloc ){
          int j;
          fprintf(pFile, "%d %d ", pAgg->nOutByte, pAgg->nOutAlloc);
          for(j=0; j<TM_BACKTRACE; j++){
            fprintf(pFile, "%p ", pAgg->aFrame[j]);
          }
          fprintf(pFile, "\n");
        }
      }
    }
    fprintf(pFile, "\nALLOCATIONS\n");
    for(i=0; i<ArraySize(pTm->aHash); i++){
      TmAgg *pAgg;
      for(pAgg=pTm->aHash[i]; pAgg; pAgg=pAgg->pNext){
        int j;
        fprintf(pFile, "%d %d ", pAgg->nByte, pAgg->nAlloc);
        for(j=0; j<TM_BACKTRACE; j++) fprintf(pFile, "%p ", pAgg->aFrame[j]);
        fprintf(pFile, "\n");
      }
    }
  }
#else
  (void)pFile;
#endif
}


#include "lsm.h"
#include "stdlib.h"

typedef struct LsmMutex LsmMutex;
struct LsmMutex {
  lsm_env *pEnv;
  lsm_mutex *pMutex;
};

static void tmLsmMutexEnter(TmGlobal *pTm){
  LsmMutex *p = (LsmMutex *)pTm->pMutex;
  p->pEnv->xMutexEnter(p->pMutex);
}
static void tmLsmMutexLeave(TmGlobal *pTm){
  LsmMutex *p = (LsmMutex *)(pTm->pMutex);
  p->pEnv->xMutexLeave(p->pMutex);
}
static void tmLsmMutexDel(TmGlobal *pTm){
  LsmMutex *p = (LsmMutex *)pTm->pMutex;
  pTm->xFree(p);
}
static void *tmLsmMalloc(int n){ return malloc(n); }
static void tmLsmFree(void *ptr){ free(ptr); }
static void *tmLsmRealloc(void *ptr, int n){ return realloc(ptr, n); }

static void *tmLsmEnvMalloc(lsm_env *p, size_t n){ 
  return tmMalloc((TmGlobal *)(p->pMemCtx), n); 
}
static void tmLsmEnvFree(lsm_env *p, void *ptr){ 
  tmFree((TmGlobal *)(p->pMemCtx), ptr); 
}
static void *tmLsmEnvRealloc(lsm_env *p, void *ptr, size_t n){ 
  return tmRealloc((TmGlobal *)(p->pMemCtx), ptr, n);
}

void testMallocInstall(lsm_env *pEnv){
  TmGlobal *pGlobal;
  LsmMutex *pMutex;
  assert( pEnv->pMemCtx==0 );

  /* Allocate and populate a TmGlobal structure. */
  pGlobal = (TmGlobal *)tmLsmMalloc(sizeof(TmGlobal));
  memset(pGlobal, 0, sizeof(TmGlobal));
  pGlobal->xMalloc = tmLsmMalloc;
  pGlobal->xRealloc = tmLsmRealloc;
  pGlobal->xFree = tmLsmFree;
  pMutex = (LsmMutex *)pGlobal->xMalloc(sizeof(LsmMutex));
  pMutex->pEnv = pEnv;
  pEnv->xMutexStatic(pEnv, LSM_MUTEX_HEAP, &pMutex->pMutex);
  pGlobal->xEnterMutex = tmLsmMutexEnter;
  pGlobal->xLeaveMutex = tmLsmMutexLeave;
  pGlobal->xDelMutex = tmLsmMutexDel;
  pGlobal->pMutex = (void *)pMutex;

  pGlobal->xSaveMalloc = (void *)pEnv->xMalloc;
  pGlobal->xSaveRealloc = (void *)pEnv->xRealloc;
  pGlobal->xSaveFree = (void *)pEnv->xFree;

  /* Set up pEnv to the use the new TmGlobal */
  pEnv->pMemCtx = (void *)pGlobal;
  pEnv->xMalloc = tmLsmEnvMalloc;
  pEnv->xRealloc = tmLsmEnvRealloc;
  pEnv->xFree = tmLsmEnvFree;
}

void testMallocUninstall(lsm_env *pEnv){
  TmGlobal *p = (TmGlobal *)pEnv->pMemCtx;
  pEnv->pMemCtx = 0;
  if( p ){
    pEnv->xMalloc = p->xSaveMalloc;
    pEnv->xRealloc = p->xSaveRealloc;
    pEnv->xFree = p->xSaveFree;
    p->xDelMutex(p);
    tmLsmFree(p);
  }
}

void testMallocCheck(
  lsm_env *pEnv,
  int *pnLeakAlloc,
  int *pnLeakByte,
  FILE *pFile
){
  if( pEnv->pMemCtx==0 ){
    *pnLeakAlloc = 0;
    *pnLeakByte = 0;
  }else{
    tmMallocCheck((TmGlobal *)(pEnv->pMemCtx), pnLeakAlloc, pnLeakByte, pFile);
  }
}

void testMallocOom(
  lsm_env *pEnv, 
  int nCountdown, 
  int bPersist,
  void (*xHook)(void *),
  void *pHookCtx
){
  TmGlobal *pTm = (TmGlobal *)(pEnv->pMemCtx);
  tmMallocOom(pTm, nCountdown, bPersist, xHook, pHookCtx);
}

void testMallocOomEnable(lsm_env *pEnv, int bEnable){
  TmGlobal *pTm = (TmGlobal *)(pEnv->pMemCtx);
  tmMallocOomEnable(pTm, bEnable);
}

Added ext/lsm1/lsm-test/lsmtest_tdb.c.

























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
** This program attempts to test the correctness of some facets of the 
** LSM database library. Specifically, that the contents of the database
** are maintained correctly during a series of inserts and deletes.
*/


#include "lsmtest_tdb.h"
#include "lsm.h"

#include "lsmtest.h"

#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifndef _WIN32
# include <unistd.h>
#endif
#include <stdio.h>


typedef struct SqlDb SqlDb;

static int error_transaction_function(TestDb *p, int iLevel){ 
  unused_parameter(p);
  unused_parameter(iLevel);
  return -1; 
}


/*************************************************************************
** Begin wrapper for LevelDB.
*/
#ifdef HAVE_LEVELDB

#include <leveldb/c.h>

typedef struct LevelDb LevelDb;
struct LevelDb {
  TestDb base;
  leveldb_t *db;
  leveldb_options_t *pOpt;
  leveldb_writeoptions_t *pWriteOpt;
  leveldb_readoptions_t *pReadOpt;

  char *pVal;
};

static int test_leveldb_close(TestDb *pTestDb){
  LevelDb *pDb = (LevelDb *)pTestDb;

  leveldb_close(pDb->db);
  leveldb_writeoptions_destroy(pDb->pWriteOpt);
  leveldb_readoptions_destroy(pDb->pReadOpt);
  leveldb_options_destroy(pDb->pOpt);
  free(pDb->pVal);
  free(pDb);

  return 0;
}

static int test_leveldb_write(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void *pVal, 
  int nVal
){
  LevelDb *pDb = (LevelDb *)pTestDb;
  char *zErr = 0;
  leveldb_put(pDb->db, pDb->pWriteOpt, pKey, nKey, pVal, nVal, &zErr);
  return (zErr!=0);
}

static int test_leveldb_delete(TestDb *pTestDb, void *pKey, int nKey){
  LevelDb *pDb = (LevelDb *)pTestDb;
  char *zErr = 0;
  leveldb_delete(pDb->db, pDb->pWriteOpt, pKey, nKey, &zErr);
  return (zErr!=0);
}

static int test_leveldb_fetch(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void **ppVal, 
  int *pnVal
){
  LevelDb *pDb = (LevelDb *)pTestDb;
  char *zErr = 0;
  size_t nVal = 0;

  if( pKey==0 ) return 0;
  free(pDb->pVal);
  pDb->pVal = leveldb_get(pDb->db, pDb->pReadOpt, pKey, nKey, &nVal, &zErr);
  *ppVal = (void *)(pDb->pVal);
  if( pDb->pVal==0 ){
    *pnVal = -1;
  }else{
    *pnVal = (int)nVal;
  }

  return (zErr!=0);
}

static int test_leveldb_scan(
  TestDb *pTestDb,
  void *pCtx,
  int bReverse,
  void *pKey1, int nKey1,         /* Start of search */
  void *pKey2, int nKey2,         /* End of search */
  void (*xCallback)(void *, void *, int , void *, int)
){
  LevelDb *pDb = (LevelDb *)pTestDb;
  leveldb_iterator_t *iter;

  iter = leveldb_create_iterator(pDb->db, pDb->pReadOpt);

  if( bReverse==0 ){
    if( pKey1 ){
      leveldb_iter_seek(iter, pKey1, nKey1);
    }else{
      leveldb_iter_seek_to_first(iter);
    }
  }else{
    if( pKey2 ){
      leveldb_iter_seek(iter, pKey2, nKey2);

      if( leveldb_iter_valid(iter)==0 ){
        leveldb_iter_seek_to_last(iter);
      }else{
        const char *k; size_t n;
        int res;
        k = leveldb_iter_key(iter, &n);
        res = memcmp(k, pKey2, MIN(n, nKey2));
        if( res==0 ) res = n - nKey2;
        assert( res>=0 );
        if( res>0 ){
          leveldb_iter_prev(iter);
        }
      }
    }else{
      leveldb_iter_seek_to_last(iter);
    }
  }


  while( leveldb_iter_valid(iter) ){
    const char *k; size_t n;
    const char *v; size_t n2;
    int res;

    k = leveldb_iter_key(iter, &n);
    if( bReverse==0 && pKey2 ){
      res = memcmp(k, pKey2, MIN(n, nKey2));
      if( res==0 ) res = n - nKey2;
      if( res>0 ) break;
    }
    if( bReverse!=0 && pKey1 ){
      res = memcmp(k, pKey1, MIN(n, nKey1));
      if( res==0 ) res = n - nKey1;
      if( res<0 ) break;
    }

    v = leveldb_iter_value(iter, &n2);

    xCallback(pCtx, (void *)k, n, (void *)v, n2);

    if( bReverse==0 ){
      leveldb_iter_next(iter);
    }else{
      leveldb_iter_prev(iter);
    }
  }

  leveldb_iter_destroy(iter);
  return 0;
}

static int test_leveldb_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  static const DatabaseMethods LeveldbMethods = {
    test_leveldb_close,
    test_leveldb_write,
    test_leveldb_delete,
    0,
    test_leveldb_fetch,
    test_leveldb_scan,
    error_transaction_function,
    error_transaction_function,
    error_transaction_function
  };

  LevelDb *pLevelDb;
  char *zErr = 0;

  if( bClear ){
    char *zCmd = sqlite3_mprintf("rm -rf %s\n", zFilename);
    system(zCmd);
    sqlite3_free(zCmd);
  }

  pLevelDb = (LevelDb *)malloc(sizeof(LevelDb));
  memset(pLevelDb, 0, sizeof(LevelDb));

  pLevelDb->pOpt = leveldb_options_create();
  leveldb_options_set_create_if_missing(pLevelDb->pOpt, 1);
  pLevelDb->pWriteOpt = leveldb_writeoptions_create();
  pLevelDb->pReadOpt = leveldb_readoptions_create();

  pLevelDb->db = leveldb_open(pLevelDb->pOpt, zFilename, &zErr);

  if( zErr ){
    test_leveldb_close((TestDb *)pLevelDb);
    *ppDb = 0;
    return 1;
  }

  *ppDb = (TestDb *)pLevelDb;
  pLevelDb->base.pMethods = &LeveldbMethods;
  return 0;
}
#endif  /* HAVE_LEVELDB */
/* 
** End wrapper for LevelDB.
*************************************************************************/

#ifdef HAVE_KYOTOCABINET
static int kc_close(TestDb *pTestDb){
  return test_kc_close(pTestDb);
}

static int kc_write(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void *pVal, 
  int nVal
){
  return test_kc_write(pTestDb, pKey, nKey, pVal, nVal);
}

static int kc_delete(TestDb *pTestDb, void *pKey, int nKey){
  return test_kc_delete(pTestDb, pKey, nKey);
}

static int kc_delete_range(
  TestDb *pTestDb, 
  void *pKey1, int nKey1,
  void *pKey2, int nKey2
){
  return test_kc_delete_range(pTestDb, pKey1, nKey1, pKey2, nKey2);
}

static int kc_fetch(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void **ppVal, 
  int *pnVal
){
  if( pKey==0 ) return LSM_OK;
  return test_kc_fetch(pTestDb, pKey, nKey, ppVal, pnVal);
}

static int kc_scan(
  TestDb *pTestDb,
  void *pCtx,
  int bReverse,
  void *pFirst, int nFirst,
  void *pLast, int nLast,
  void (*xCallback)(void *, void *, int , void *, int)
){
  return test_kc_scan(
      pTestDb, pCtx, bReverse, pFirst, nFirst, pLast, nLast, xCallback
  );
}

static int kc_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  static const DatabaseMethods KcdbMethods = {
    kc_close,
    kc_write,
    kc_delete,
    kc_delete_range,
    kc_fetch,
    kc_scan,
    error_transaction_function,
    error_transaction_function,
    error_transaction_function
  };

  int rc;
  TestDb *pTestDb = 0;

  rc = test_kc_open(zFilename, bClear, &pTestDb);
  if( rc!=0 ){
    *ppDb = 0;
    return rc;
  }
  pTestDb->pMethods = &KcdbMethods;
  *ppDb = pTestDb;
  return 0;
}
#endif /* HAVE_KYOTOCABINET */
/* 
** End wrapper for Kyoto cabinet.
*************************************************************************/

#ifdef HAVE_MDB
static int mdb_close(TestDb *pTestDb){
  return test_mdb_close(pTestDb);
}

static int mdb_write(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void *pVal, 
  int nVal
){
  return test_mdb_write(pTestDb, pKey, nKey, pVal, nVal);
}

static int mdb_delete(TestDb *pTestDb, void *pKey, int nKey){
  return test_mdb_delete(pTestDb, pKey, nKey);
}

static int mdb_fetch(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void **ppVal, 
  int *pnVal
){
  if( pKey==0 ) return LSM_OK;
  return test_mdb_fetch(pTestDb, pKey, nKey, ppVal, pnVal);
}

static int mdb_scan(
  TestDb *pTestDb,
  void *pCtx,
  int bReverse,
  void *pFirst, int nFirst,
  void *pLast, int nLast,
  void (*xCallback)(void *, void *, int , void *, int)
){
  return test_mdb_scan(
      pTestDb, pCtx, bReverse, pFirst, nFirst, pLast, nLast, xCallback
  );
}

static int mdb_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  static const DatabaseMethods KcdbMethods = {
    mdb_close,
    mdb_write,
    mdb_delete,
    0,
    mdb_fetch,
    mdb_scan,
    error_transaction_function,
    error_transaction_function,
    error_transaction_function
  };

  int rc;
  TestDb *pTestDb = 0;

  rc = test_mdb_open(zSpec, zFilename, bClear, &pTestDb);
  if( rc!=0 ){
    *ppDb = 0;
    return rc;
  }
  pTestDb->pMethods = &KcdbMethods;
  *ppDb = pTestDb;
  return 0;
}
#endif /* HAVE_MDB */

/*************************************************************************
** Begin wrapper for SQLite.
*/

/*
** nOpenTrans:
**   The number of open nested transactions, in the same sense as used
**   by the tdb_begin/commit/rollback and SQLite 4 KV interfaces. If this
**   value is 0, there are no transactions open at all. If it is 1, then
**   there is a read transaction. If it is 2 or greater, then there are
**   (nOpenTrans-1) nested write transactions open.
*/
struct SqlDb {
  TestDb base;
  sqlite3 *db;
  sqlite3_stmt *pInsert;
  sqlite3_stmt *pDelete;
  sqlite3_stmt *pDeleteRange;
  sqlite3_stmt *pFetch;
  sqlite3_stmt *apScan[8];

  int nOpenTrans;

  /* Used by sql_fetch() to allocate space for results */
  int nAlloc;
  u8 *aAlloc;
};

static int sql_close(TestDb *pTestDb){
  SqlDb *pDb = (SqlDb *)pTestDb;
  sqlite3_finalize(pDb->pInsert);
  sqlite3_finalize(pDb->pDelete);
  sqlite3_finalize(pDb->pDeleteRange);
  sqlite3_finalize(pDb->pFetch);
  sqlite3_finalize(pDb->apScan[0]);
  sqlite3_finalize(pDb->apScan[1]);
  sqlite3_finalize(pDb->apScan[2]);
  sqlite3_finalize(pDb->apScan[3]);
  sqlite3_finalize(pDb->apScan[4]);
  sqlite3_finalize(pDb->apScan[5]);
  sqlite3_finalize(pDb->apScan[6]);
  sqlite3_finalize(pDb->apScan[7]);
  sqlite3_close(pDb->db);
  free((char *)pDb->aAlloc);
  free((char *)pDb);
  return SQLITE_OK;
}

static int sql_write(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void *pVal, 
  int nVal
){
  SqlDb *pDb = (SqlDb *)pTestDb;
  sqlite3_bind_blob(pDb->pInsert, 1, pKey, nKey, SQLITE_STATIC);
  sqlite3_bind_blob(pDb->pInsert, 2, pVal, nVal, SQLITE_STATIC);
  sqlite3_step(pDb->pInsert);
  return sqlite3_reset(pDb->pInsert);
}

static int sql_delete(TestDb *pTestDb, void *pKey, int nKey){
  SqlDb *pDb = (SqlDb *)pTestDb;
  sqlite3_bind_blob(pDb->pDelete, 1, pKey, nKey, SQLITE_STATIC);
  sqlite3_step(pDb->pDelete);
  return sqlite3_reset(pDb->pDelete);
}

static int sql_delete_range(
  TestDb *pTestDb, 
  void *pKey1, int nKey1,
  void *pKey2, int nKey2
){
  SqlDb *pDb = (SqlDb *)pTestDb;
  sqlite3_bind_blob(pDb->pDeleteRange, 1, pKey1, nKey1, SQLITE_STATIC);
  sqlite3_bind_blob(pDb->pDeleteRange, 2, pKey2, nKey2, SQLITE_STATIC);
  sqlite3_step(pDb->pDeleteRange);
  return sqlite3_reset(pDb->pDeleteRange);
}

static int sql_fetch(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void **ppVal, 
  int *pnVal
){
  SqlDb *pDb = (SqlDb *)pTestDb;
  int rc;

  sqlite3_reset(pDb->pFetch);
  if( pKey==0 ){
    assert( ppVal==0 );
    assert( pnVal==0 );
    return LSM_OK;
  }

  sqlite3_bind_blob(pDb->pFetch, 1, pKey, nKey, SQLITE_STATIC);
  rc = sqlite3_step(pDb->pFetch);
  if( rc==SQLITE_ROW ){
    int nVal = sqlite3_column_bytes(pDb->pFetch, 0);
    u8 *aVal = (void *)sqlite3_column_blob(pDb->pFetch, 0);

    if( nVal>pDb->nAlloc ){
      free(pDb->aAlloc);
      pDb->aAlloc = (u8 *)malloc(nVal*2);
      pDb->nAlloc = nVal*2;
    }
    memcpy(pDb->aAlloc, aVal, nVal);
    *pnVal = nVal;
    *ppVal = (void *)pDb->aAlloc;
  }else{
    *pnVal = -1;
    *ppVal = 0;
  }

  rc = sqlite3_reset(pDb->pFetch);
  return rc;
}

static int sql_scan(
  TestDb *pTestDb,
  void *pCtx,
  int bReverse,
  void *pFirst, int nFirst,
  void *pLast, int nLast,
  void (*xCallback)(void *, void *, int , void *, int)
){
  SqlDb *pDb = (SqlDb *)pTestDb;
  sqlite3_stmt *pScan;

  assert( bReverse==1 || bReverse==0 );
  pScan = pDb->apScan[(pFirst==0) + (pLast==0)*2 + bReverse*4];

  if( pFirst ) sqlite3_bind_blob(pScan, 1, pFirst, nFirst, SQLITE_STATIC);
  if( pLast ) sqlite3_bind_blob(pScan, 2, pLast, nLast, SQLITE_STATIC);

  while( SQLITE_ROW==sqlite3_step(pScan) ){
    void *pKey; int nKey;
    void *pVal; int nVal;

    nKey = sqlite3_column_bytes(pScan, 0);
    pKey = (void *)sqlite3_column_blob(pScan, 0);
    nVal = sqlite3_column_bytes(pScan, 1);
    pVal = (void *)sqlite3_column_blob(pScan, 1);

    xCallback(pCtx, pKey, nKey, pVal, nVal);
  }
  return sqlite3_reset(pScan);
}

static int sql_begin(TestDb *pTestDb, int iLevel){
  int i;
  SqlDb *pDb = (SqlDb *)pTestDb;

  /* iLevel==0 is a no-op */
  if( iLevel==0 ) return 0;

  /* If there are no transactions at all open, open a read transaction. */
  if( pDb->nOpenTrans==0 ){
    int rc = sqlite3_exec(pDb->db, 
        "BEGIN; SELECT * FROM sqlite_master LIMIT 1;" , 0, 0, 0
    );
    if( rc!=0 ) return rc;
    pDb->nOpenTrans = 1;
  }

  /* Open any required write transactions */
  for(i=pDb->nOpenTrans; i<iLevel; i++){
    char *zSql = sqlite3_mprintf("SAVEPOINT x%d", i);
    int rc = sqlite3_exec(pDb->db, zSql, 0, 0, 0);
    sqlite3_free(zSql);
    if( rc!=SQLITE_OK ) return rc;
  }

  pDb->nOpenTrans = iLevel;
  return 0;
}

static int sql_commit(TestDb *pTestDb, int iLevel){
  SqlDb *pDb = (SqlDb *)pTestDb;
  assert( iLevel>=0 );

  /* Close the read transaction if requested. */
  if( pDb->nOpenTrans>=1 && iLevel==0 ){
    int rc = sqlite3_exec(pDb->db, "COMMIT", 0, 0, 0);
    if( rc!=0 ) return rc;
    pDb->nOpenTrans = 0;
  }

  /* Close write transactions as required */
  if( pDb->nOpenTrans>iLevel ){
    char *zSql = sqlite3_mprintf("RELEASE x%d", iLevel);
    int rc = sqlite3_exec(pDb->db, zSql, 0, 0, 0);
    sqlite3_free(zSql);
    if( rc!=0 ) return rc;
  }

  pDb->nOpenTrans = iLevel;
  return 0;
}

static int sql_rollback(TestDb *pTestDb, int iLevel){
  SqlDb *pDb = (SqlDb *)pTestDb;
  assert( iLevel>=0 );

  if( pDb->nOpenTrans>=1 && iLevel==0 ){
    /* Close the read transaction if requested. */
    int rc = sqlite3_exec(pDb->db, "ROLLBACK", 0, 0, 0);
    if( rc!=0 ) return rc;
  }else if( pDb->nOpenTrans>1 && iLevel==1 ){
    /* Or, rollback and close the top-level write transaction */
    int rc = sqlite3_exec(pDb->db, "ROLLBACK TO x1; RELEASE x1;", 0, 0, 0);
    if( rc!=0 ) return rc;
  }else{
    /* Or, just roll back some nested transactions */
    char *zSql = sqlite3_mprintf("ROLLBACK TO x%d", iLevel-1);
    int rc = sqlite3_exec(pDb->db, zSql, 0, 0, 0);
    sqlite3_free(zSql);
    if( rc!=0 ) return rc;
  }

  pDb->nOpenTrans = iLevel;
  return 0;
}

static int sql_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  static const DatabaseMethods SqlMethods = {
    sql_close,
    sql_write,
    sql_delete,
    sql_delete_range,
    sql_fetch,
    sql_scan,
    sql_begin,
    sql_commit,
    sql_rollback
  };
  const char *zCreate = "CREATE TABLE IF NOT EXISTS t1(k PRIMARY KEY, v)";
  const char *zInsert = "REPLACE INTO t1 VALUES(?, ?)";
  const char *zDelete = "DELETE FROM t1 WHERE k = ?";
  const char *zRange = "DELETE FROM t1 WHERE k>? AND k<?";
  const char *zFetch  = "SELECT v FROM t1 WHERE k = ?";

  const char *zScan0  = "SELECT * FROM t1 WHERE k BETWEEN ?1 AND ?2 ORDER BY k";
  const char *zScan1  = "SELECT * FROM t1 WHERE k <= ?2 ORDER BY k";
  const char *zScan2  = "SELECT * FROM t1 WHERE k >= ?1 ORDER BY k";
  const char *zScan3  = "SELECT * FROM t1 ORDER BY k";

  const char *zScan4  = 
    "SELECT * FROM t1 WHERE k BETWEEN ?1 AND ?2 ORDER BY k DESC";
  const char *zScan5  = "SELECT * FROM t1 WHERE k <= ?2 ORDER BY k DESC";
  const char *zScan6  = "SELECT * FROM t1 WHERE k >= ?1 ORDER BY k DESC";
  const char *zScan7  = "SELECT * FROM t1 ORDER BY k DESC";

  int rc;
  SqlDb *pDb;
  char *zPragma;

  if( bClear && zFilename && zFilename[0] ){
    unlink(zFilename);
  }

  pDb = (SqlDb *)malloc(sizeof(SqlDb));
  memset(pDb, 0, sizeof(SqlDb));
  pDb->base.pMethods = &SqlMethods;

  if( 0!=(rc = sqlite3_open(zFilename, &pDb->db))
   || 0!=(rc = sqlite3_exec(pDb->db, zCreate, 0, 0, 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zInsert, -1, &pDb->pInsert, 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zDelete, -1, &pDb->pDelete, 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zRange, -1, &pDb->pDeleteRange, 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zFetch, -1, &pDb->pFetch, 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zScan0, -1, &pDb->apScan[0], 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zScan1, -1, &pDb->apScan[1], 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zScan2, -1, &pDb->apScan[2], 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zScan3, -1, &pDb->apScan[3], 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zScan4, -1, &pDb->apScan[4], 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zScan5, -1, &pDb->apScan[5], 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zScan6, -1, &pDb->apScan[6], 0))
   || 0!=(rc = sqlite3_prepare_v2(pDb->db, zScan7, -1, &pDb->apScan[7], 0))
  ){
    *ppDb = 0;
    sql_close((TestDb *)pDb);
    return rc;
  }

  zPragma = sqlite3_mprintf("PRAGMA page_size=%d", TESTDB_DEFAULT_PAGE_SIZE);
  sqlite3_exec(pDb->db, zPragma, 0, 0, 0);
  sqlite3_free(zPragma);
  zPragma = sqlite3_mprintf("PRAGMA cache_size=%d", TESTDB_DEFAULT_CACHE_SIZE);
  sqlite3_exec(pDb->db, zPragma, 0, 0, 0);
  sqlite3_free(zPragma);

  /* sqlite3_exec(pDb->db, "PRAGMA locking_mode=EXCLUSIVE", 0, 0, 0); */
  sqlite3_exec(pDb->db, "PRAGMA synchronous=OFF", 0, 0, 0);
  sqlite3_exec(pDb->db, "PRAGMA journal_mode=WAL", 0, 0, 0);
  sqlite3_exec(pDb->db, "PRAGMA wal_autocheckpoint=4096", 0, 0, 0);
  if( zSpec ){
    rc = sqlite3_exec(pDb->db, zSpec, 0, 0, 0);
    if( rc!=SQLITE_OK ){
      sql_close((TestDb *)pDb);
      return rc;
    }
  }

  *ppDb = (TestDb *)pDb;
  return 0;
}
/* 
** End wrapper for SQLite.
*************************************************************************/

/*************************************************************************
** Begin exported functions.
*/
static struct Lib {
  const char *zName;
  const char *zDefaultDb;
  int (*xOpen)(const char *, const char *zFilename, int bClear, TestDb **ppDb);
} aLib[] = {
  { "sqlite3",      "testdb.sqlite",    sql_open },
  { "lsm_small",    "testdb.lsm_small", test_lsm_small_open },
  { "lsm_lomem",    "testdb.lsm_lomem", test_lsm_lomem_open },
#ifdef HAVE_ZLIB
  { "lsm_zip",      "testdb.lsm_zip",   test_lsm_zip_open },
#endif
  { "lsm",          "testdb.lsm",       test_lsm_open },
#ifdef LSM_MUTEX_PTHREADS
  { "lsm_mt2",      "testdb.lsm_mt2",   test_lsm_mt2 },
  { "lsm_mt3",      "testdb.lsm_mt3",   test_lsm_mt3 },
#endif
#ifdef HAVE_LEVELDB
  { "leveldb",      "testdb.leveldb",   test_leveldb_open },
#endif
#ifdef HAVE_KYOTOCABINET
  { "kyotocabinet", "testdb.kc",        kc_open },
#endif
#ifdef HAVE_MDB
  { "mdb", "./testdb.mdb",        mdb_open }
#endif
};

const char *tdb_system_name(int i){
  if( i<0 || i>=ArraySize(aLib) ) return 0;
  return aLib[i].zName;
}

const char *tdb_default_db(const char *zSys){
  int i;
  for(i=0; i<ArraySize(aLib); i++){
    if( strcmp(aLib[i].zName, zSys)==0 ) return aLib[i].zDefaultDb;
  }
  return 0;
}

int tdb_open(const char *zLib, const char *zDb, int bClear, TestDb **ppDb){
  int i;
  int rc = 1;
  const char *zSpec = 0;

  int nLib = 0;
  while( zLib[nLib] && zLib[nLib]!=' ' ){
    nLib++;
  }
  zSpec = &zLib[nLib];
  while( *zSpec==' ' ) zSpec++;
  if( *zSpec=='\0' ) zSpec = 0;

  for(i=0; i<ArraySize(aLib); i++){
    if( strlen(aLib[i].zName)==nLib && 0==memcmp(zLib, aLib[i].zName, nLib) ){
      rc = aLib[i].xOpen(zSpec, (zDb ? zDb : aLib[i].zDefaultDb), bClear, ppDb);
      if( rc==0 ){
        (*ppDb)->zLibrary = aLib[i].zName;
      }
      break;
    }
  }

  if( rc ){
    /* Failed to find the requested database library. Return an error. */
    *ppDb = 0;
  }
  return rc;
}

int tdb_close(TestDb *pDb){
  if( pDb ){
    return pDb->pMethods->xClose(pDb);
  }
  return 0;
}

int tdb_write(TestDb *pDb, void *pKey, int nKey, void *pVal, int nVal){
  return pDb->pMethods->xWrite(pDb, pKey, nKey, pVal, nVal);
}

int tdb_delete(TestDb *pDb, void *pKey, int nKey){
  return pDb->pMethods->xDelete(pDb, pKey, nKey);
}

int tdb_delete_range(
    TestDb *pDb, void *pKey1, int nKey1, void *pKey2, int nKey2
){
  return pDb->pMethods->xDeleteRange(pDb, pKey1, nKey1, pKey2, nKey2);
}

int tdb_fetch(TestDb *pDb, void *pKey, int nKey, void **ppVal, int *pnVal){
  return pDb->pMethods->xFetch(pDb, pKey, nKey, ppVal, pnVal);
}

int tdb_scan(
  TestDb *pDb,                    /* Database handle */
  void *pCtx,                     /* Context pointer to pass to xCallback */
  int bReverse,                   /* True to scan in reverse order */
  void *pKey1, int nKey1,         /* Start of search */
  void *pKey2, int nKey2,         /* End of search */
  void (*xCallback)(void *pCtx, void *pKey, int nKey, void *pVal, int nVal)
){
  return pDb->pMethods->xScan(
      pDb, pCtx, bReverse, pKey1, nKey1, pKey2, nKey2, xCallback
  );
}

int tdb_begin(TestDb *pDb, int iLevel){
  return pDb->pMethods->xBegin(pDb, iLevel);
}
int tdb_commit(TestDb *pDb, int iLevel){
  return pDb->pMethods->xCommit(pDb, iLevel);
}
int tdb_rollback(TestDb *pDb, int iLevel){
  return pDb->pMethods->xRollback(pDb, iLevel);
}

int tdb_transaction_support(TestDb *pDb){
  return (pDb->pMethods->xBegin != error_transaction_function);
}

const char *tdb_library_name(TestDb *pDb){
  return pDb->zLibrary;
}

/* 
** End exported functions.
*************************************************************************/

Added ext/lsm1/lsm-test/lsmtest_tdb.h.





























































































































































































































































































































































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/*
** This file is the interface to a very simple database library used for
** testing. The interface is similar to that of the LSM. The main virtue 
** of this library is that the same API may be used to access a key-value
** store implemented by LSM, SQLite or another database system. Which 
** makes it easy to use for correctness and performance tests.
*/

#ifndef __WRAPPER_H_
#define __WRAPPER_H_

#ifdef __cplusplus
extern "C" {
#endif

#include "lsm.h"

typedef struct TestDb TestDb;

/*
** Open a new database connection. The first argument is the name of the
** database library to use. e.g. something like:
**
**     "sqlite3"
**     "lsm"
**
** See function tdb_system_name() for a list of available database systems.
**
** The second argument is the name of the database to open (e.g. a filename).
**
** If the third parameter is non-zero, then any existing database by the
** name of zDb is removed before opening a new one. If it is zero, then an
** existing database may be opened.
*/
int tdb_open(const char *zLibrary, const char *zDb, int bClear, TestDb **ppDb);

/*
** Close a database handle.
*/
int tdb_close(TestDb *pDb);

/*
** Write a new key/value into the database.
*/
int tdb_write(TestDb *pDb, void *pKey, int nKey, void *pVal, int nVal);

/*
** Delete a key from the database.
*/
int tdb_delete(TestDb *pDb, void *pKey, int nKey);

/*
** Delete a range of keys from the database.
*/
int tdb_delete_range(TestDb *, void *pKey1, int nKey1, void *pKey2, int nKey2);

/*
** Query the database for key (pKey/nKey). If no entry is found, set *ppVal
** to 0 and *pnVal to -1 before returning. Otherwise, set *ppVal and *pnVal
** to a pointer to and size of the value associated with (pKey/nKey).
*/
int tdb_fetch(TestDb *pDb, void *pKey, int nKey, void **ppVal, int *pnVal);

/*
** Open and close nested transactions. Currently, these functions only 
** work for SQLite3 and LSM systems. Use the tdb_transaction_support() 
** function to determine if a given TestDb handle supports these methods.
**
** These functions and the iLevel parameter follow the same conventions as
** the SQLite 4 transaction interface. Note that this is slightly different
** from the way LSM does things. As follows:
**
** tdb_begin():
**   A successful call to tdb_begin() with (iLevel>1) guarantees that 
**   there are at least (iLevel-1) write transactions open. If iLevel==1,
**   then it guarantees that at least a read-transaction is open. Calling
**   tdb_begin() with iLevel==0 is a no-op.
**
** tdb_commit():
**   A successful call to tdb_commit() with (iLevel>1) guarantees that 
**   there are at most (iLevel-1) write transactions open. If iLevel==1,
**   then it guarantees that there are no write transactions open (although
**   a read-transaction may remain open).  Calling tdb_commit() with 
**   iLevel==0 ensures that all transactions, read or write, have been 
**   closed and committed.
**
** tdb_rollback():
**   This call is similar to tdb_commit(), except that instead of committing
**   transactions, it reverts them. For example, calling tdb_rollback() with
**   iLevel==2 ensures that there is at most one write transaction open, and
**   restores the database to the state that it was in when that transaction
**   was opened.
**
**   In other words, tdb_commit() just closes transactions - tdb_rollback()
**   closes transactions and then restores the database to the state it
**   was in before those transactions were even opened.
*/
int tdb_begin(TestDb *pDb, int iLevel);
int tdb_commit(TestDb *pDb, int iLevel);
int tdb_rollback(TestDb *pDb, int iLevel);

/*
** Return true if transactions are supported, or false otherwise.
*/
int tdb_transaction_support(TestDb *pDb);

/*
** Return the name of the database library (as passed to tdb_open()) used
** by the handled passed as the first argument.
*/
const char *tdb_library_name(TestDb *pDb);

/*
** Scan a range of database keys. Invoke the callback function for each
** key visited.
*/
int tdb_scan(
  TestDb *pDb,                    /* Database handle */
  void *pCtx,                     /* Context pointer to pass to xCallback */
  int bReverse,                   /* True to scan in reverse order */
  void *pKey1, int nKey1,         /* Start of search */
  void *pKey2, int nKey2,         /* End of search */
  void (*xCallback)(void *pCtx, void *pKey, int nKey, void *pVal, int nVal)
);

const char *tdb_system_name(int i);
const char *tdb_default_db(const char *zSys);

int tdb_lsm_open(const char *zCfg, const char *zDb, int bClear, TestDb **ppDb);

/*
** If the TestDb handle passed as an argument is a wrapper around an LSM
** database, return the LSM handle. Otherwise, if the argument is some other
** database system, return NULL.
*/
lsm_db *tdb_lsm(TestDb *pDb);

/*
** Return true if the db passed as an argument is a multi-threaded LSM
** connection.
*/
int tdb_lsm_multithread(TestDb *pDb);

/*
** Return a pointer to the lsm_env object used by all lsm database
** connections initialized as a copy of the object returned by 
** lsm_default_env(). It may be modified (e.g. to override functions)
** if the caller can guarantee that it is not already in use.
*/
lsm_env *tdb_lsm_env(void);

/*
** The following functions only work with LSM database handles. It is
** illegal to call them with any other type of database handle specified
** as an argument.
*/
void tdb_lsm_enable_log(TestDb *pDb, int bEnable);
void tdb_lsm_application_crash(TestDb *pDb);
void tdb_lsm_prepare_system_crash(TestDb *pDb);
void tdb_lsm_system_crash(TestDb *pDb);
void tdb_lsm_prepare_sync_crash(TestDb *pDb, int iSync);


void tdb_lsm_safety(TestDb *pDb, int eMode);
void tdb_lsm_config_work_hook(TestDb *pDb, void (*)(lsm_db *, void *), void *);
void tdb_lsm_write_hook(TestDb *, void(*)(void*,int,lsm_i64,int,int), void*);
int tdb_lsm_config_str(TestDb *pDb, const char *zStr);

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

#endif

Added ext/lsm1/lsm-test/lsmtest_tdb2.cc.





































































































































































































































































































































































































































































































































































































































































































































































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#include "lsmtest.h"
#include <stdlib.h>

#ifdef HAVE_KYOTOCABINET
#include "kcpolydb.h"
extern "C" {
  struct KcDb {
    TestDb base;
    kyotocabinet::TreeDB* db;
    char *pVal;
  };
}

int test_kc_open(const char *zFilename, int bClear, TestDb **ppDb){
  KcDb *pKcDb;
  int ok;
  int rc = 0;

  if( bClear ){
    char *zCmd = sqlite3_mprintf("rm -rf %s\n", zFilename);
    system(zCmd);
    sqlite3_free(zCmd);
  }

  pKcDb = (KcDb *)malloc(sizeof(KcDb));
  memset(pKcDb, 0, sizeof(KcDb));


  pKcDb->db = new kyotocabinet::TreeDB();
  pKcDb->db->tune_page(TESTDB_DEFAULT_PAGE_SIZE);
  pKcDb->db->tune_page_cache(
      TESTDB_DEFAULT_PAGE_SIZE * TESTDB_DEFAULT_CACHE_SIZE
  );
  ok = pKcDb->db->open(zFilename,
      kyotocabinet::PolyDB::OWRITER | kyotocabinet::PolyDB::OCREATE
  );
  if( ok==0 ){
    free(pKcDb);
    pKcDb = 0;
    rc = 1;
  }

  *ppDb = (TestDb *)pKcDb;
  return rc;
}

int test_kc_close(TestDb *pDb){
  KcDb *pKcDb = (KcDb *)pDb;
  if( pKcDb->pVal ){
    delete [] pKcDb->pVal;
  }
  pKcDb->db->close();
  delete pKcDb->db;
  free(pKcDb);
  return 0;
}

int test_kc_write(TestDb *pDb, void *pKey, int nKey, void *pVal, int nVal){
  KcDb *pKcDb = (KcDb *)pDb;
  int ok;

  ok = pKcDb->db->set((const char *)pKey, nKey, (const char *)pVal, nVal);
  return (ok ? 0 : 1);
}

int test_kc_delete(TestDb *pDb, void *pKey, int nKey){
  KcDb *pKcDb = (KcDb *)pDb;
  int ok;

  ok = pKcDb->db->remove((const char *)pKey, nKey);
  return (ok ? 0 : 1);
}

int test_kc_delete_range(
  TestDb *pDb, 
  void *pKey1, int nKey1,
  void *pKey2, int nKey2
){
  int res;
  KcDb *pKcDb = (KcDb *)pDb;
  kyotocabinet::DB::Cursor* pCur = pKcDb->db->cursor();

  if( pKey1 ){
    res = pCur->jump((const char *)pKey1, nKey1);
  }else{
    res = pCur->jump();
  }

  while( 1 ){
    const char *pKey; size_t nKey;
    const char *pVal; size_t nVal;

    pKey = pCur->get(&nKey, &pVal, &nVal);
    if( pKey==0 ) break;

#ifndef NDEBUG
    if( pKey1 ){
      res = memcmp(pKey, pKey1, MIN((size_t)nKey1, nKey));
      assert( res>0 || (res==0 && nKey>nKey1) );
    }
#endif

    if( pKey2 ){
      res = memcmp(pKey, pKey2, MIN((size_t)nKey2, nKey));
      if( res>0 || (res==0 && (size_t)nKey2<nKey) ){
        delete [] pKey;
        break;
      }
    }
    pCur->remove();
    delete [] pKey;
  }

  delete pCur;
  return 0;
}

int test_kc_fetch(
  TestDb *pDb, 
  void *pKey, 
  int nKey, 
  void **ppVal,
  int *pnVal
){
  KcDb *pKcDb = (KcDb *)pDb;
  size_t nVal;

  if( pKcDb->pVal ){
    delete [] pKcDb->pVal;
    pKcDb->pVal = 0;
  }

  pKcDb->pVal = pKcDb->db->get((const char *)pKey, nKey, &nVal);
  if( pKcDb->pVal ){
    *ppVal = pKcDb->pVal;
    *pnVal = nVal;
  }else{
    *ppVal = 0;
    *pnVal = -1;
  }

  return 0;
}

int test_kc_scan(
  TestDb *pDb,                    /* Database handle */
  void *pCtx,                     /* Context pointer to pass to xCallback */
  int bReverse,                   /* True for a reverse order scan */
  void *pKey1, int nKey1,         /* Start of search */
  void *pKey2, int nKey2,         /* End of search */
  void (*xCallback)(void *pCtx, void *pKey, int nKey, void *pVal, int nVal)
){
  KcDb *pKcDb = (KcDb *)pDb;
  kyotocabinet::DB::Cursor* pCur = pKcDb->db->cursor();
  int res;

  if( bReverse==0 ){
    if( pKey1 ){
      res = pCur->jump((const char *)pKey1, nKey1);
    }else{
      res = pCur->jump();
    }
  }else{
    if( pKey2 ){
      res = pCur->jump_back((const char *)pKey2, nKey2);
    }else{
      res = pCur->jump_back();
    }
  }

  while( res ){
    const char *pKey; size_t nKey;
    const char *pVal; size_t nVal;
    pKey = pCur->get(&nKey, &pVal, &nVal);

    if( bReverse==0 && pKey2 ){
      res = memcmp(pKey, pKey2, MIN((size_t)nKey2, nKey));
      if( res>0 || (res==0 && (size_t)nKey2<nKey) ){
        delete [] pKey;
        break;
      }
    }else if( bReverse!=0 && pKey1 ){
      res = memcmp(pKey, pKey1, MIN((size_t)nKey1, nKey));
      if( res<0 || (res==0 && (size_t)nKey1>nKey) ){
        delete [] pKey;
        break;
      }
    }

    xCallback(pCtx, (void *)pKey, (int)nKey, (void *)pVal, (int)nVal);
    delete [] pKey;

    if( bReverse ){
      res = pCur->step_back();
    }else{
      res = pCur->step();
    }
  }

  delete pCur;
  return 0;
}
#endif /* HAVE_KYOTOCABINET */

#ifdef HAVE_MDB 
#include "lmdb.h"

extern "C" {
  struct MdbDb {
    TestDb base;
    MDB_env *env;
    MDB_dbi dbi;
  };
}

int test_mdb_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  MDB_txn *txn;
  MdbDb *pMdb;
  int rc;

  if( bClear ){
    char *zCmd = sqlite3_mprintf("rm -rf %s\n", zFilename);
    system(zCmd);
    sqlite3_free(zCmd);
  }

  pMdb = (MdbDb *)malloc(sizeof(MdbDb));
  memset(pMdb, 0, sizeof(MdbDb));

  rc = mdb_env_create(&pMdb->env);
  if( rc==0 ) rc = mdb_env_set_mapsize(pMdb->env, 1*1024*1024*1024);
  if( rc==0 ) rc = mdb_env_open(pMdb->env, zFilename, MDB_NOSYNC|MDB_NOSUBDIR, 0600);
  if( rc==0 ) rc = mdb_txn_begin(pMdb->env, NULL, 0, &txn);
  if( rc==0 ){
    rc = mdb_open(txn, NULL, 0, &pMdb->dbi);
    mdb_txn_commit(txn);
  }

  *ppDb = (TestDb *)pMdb;
  return rc;
}

int test_mdb_close(TestDb *pDb){
  MdbDb *pMdb = (MdbDb *)pDb;

  mdb_close(pMdb->env, pMdb->dbi);
  mdb_env_close(pMdb->env);
  free(pMdb);
  return 0;
}

int test_mdb_write(TestDb *pDb, void *pKey, int nKey, void *pVal, int nVal){
  int rc;
  MdbDb *pMdb = (MdbDb *)pDb;
  MDB_val val;
  MDB_val key;
  MDB_txn *txn;

  val.mv_size = nVal; 
  val.mv_data = pVal;
  key.mv_size = nKey; 
  key.mv_data = pKey;

  rc = mdb_txn_begin(pMdb->env, NULL, 0, &txn);
  if( rc==0 ){
    rc = mdb_put(txn, pMdb->dbi, &key, &val, 0);
    if( rc==0 ){
      rc = mdb_txn_commit(txn);
    }else{
      mdb_txn_abort(txn);
    }
  }
  
  return rc;
}

int test_mdb_delete(TestDb *pDb, void *pKey, int nKey){
  int rc;
  MdbDb *pMdb = (MdbDb *)pDb;
  MDB_val key;
  MDB_txn *txn;

  key.mv_size = nKey; 
  key.mv_data = pKey;
  rc = mdb_txn_begin(pMdb->env, NULL, 0, &txn);
  if( rc==0 ){
    rc = mdb_del(txn, pMdb->dbi, &key, 0);
    if( rc==0 ){
      rc = mdb_txn_commit(txn);
    }else{
      mdb_txn_abort(txn);
    }
  }
  
  return rc;
}

int test_mdb_fetch(
  TestDb *pDb, 
  void *pKey, 
  int nKey, 
  void **ppVal,
  int *pnVal
){
  int rc;
  MdbDb *pMdb = (MdbDb *)pDb;
  MDB_val key;
  MDB_txn *txn;

  key.mv_size = nKey;
  key.mv_data = pKey;

  rc = mdb_txn_begin(pMdb->env, NULL, MDB_RDONLY, &txn);
  if( rc==0 ){
    MDB_val val = {0, 0};
    rc = mdb_get(txn, pMdb->dbi, &key, &val);
    if( rc==MDB_NOTFOUND ){
      rc = 0;
      *ppVal = 0;
      *pnVal = -1;
    }else{
      *ppVal = val.mv_data;
      *pnVal = val.mv_size;
    }
    mdb_txn_commit(txn);
  }

  return rc;
}

int test_mdb_scan(
  TestDb *pDb,                    /* Database handle */
  void *pCtx,                     /* Context pointer to pass to xCallback */
  int bReverse,                   /* True for a reverse order scan */
  void *pKey1, int nKey1,         /* Start of search */
  void *pKey2, int nKey2,         /* End of search */
  void (*xCallback)(void *pCtx, void *pKey, int nKey, void *pVal, int nVal)
){
  MdbDb *pMdb = (MdbDb *)pDb;
  int rc;
  MDB_cursor_op op = bReverse ? MDB_PREV : MDB_NEXT;
  MDB_txn *txn;

  rc = mdb_txn_begin(pMdb->env, NULL, MDB_RDONLY, &txn);
  if( rc==0 ){
    MDB_cursor *csr;
    MDB_val key = {0, 0};
    MDB_val val = {0, 0};

    rc = mdb_cursor_open(txn, pMdb->dbi, &csr);
    if( rc==0 ){
      while( mdb_cursor_get(csr, &key, &val, op)==0 ){
        xCallback(pCtx, key.mv_data, key.mv_size, val.mv_data, val.mv_size);
      }
      mdb_cursor_close(csr);
    }
  }

  return rc;
}

#endif /* HAVE_MDB */

Added ext/lsm1/lsm-test/lsmtest_tdb3.c.























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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#include "lsmtest_tdb.h"
#include "lsm.h"
#include "lsmtest.h"

#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifndef _WIN32
# include <unistd.h>
#endif
#include <stdio.h>

#ifndef _WIN32
# include <sys/time.h>
#endif

typedef struct LsmDb LsmDb;
typedef struct LsmWorker LsmWorker;
typedef struct LsmFile LsmFile;

#define LSMTEST_DFLT_MT_MAX_CKPT (8*1024)
#define LSMTEST_DFLT_MT_MIN_CKPT (2*1024)

#ifdef LSM_MUTEX_PTHREADS
#include <pthread.h>

#define LSMTEST_THREAD_CKPT      1
#define LSMTEST_THREAD_WORKER    2
#define LSMTEST_THREAD_WORKER_AC 3

/*
** There are several different types of worker threads that run in different
** test configurations, depending on the value of LsmWorker.eType.
**
**   1. Checkpointer.
**   2. Worker with auto-checkpoint.
**   3. Worker without auto-checkpoint.
*/
struct LsmWorker {
  LsmDb *pDb;                     /* Main database structure */
  lsm_db *pWorker;                /* Worker database handle */
  pthread_t worker_thread;        /* Worker thread */
  pthread_cond_t worker_cond;     /* Condition var the worker waits on */
  pthread_mutex_t worker_mutex;   /* Mutex used with worker_cond */
  int bDoWork;                    /* Set to true by client when there is work */
  int worker_rc;                  /* Store error code here */
  int eType;                      /* LSMTEST_THREAD_XXX constant */
  int bBlock;
};
#else
struct LsmWorker { int worker_rc; int bBlock; };
#endif

static void mt_shutdown(LsmDb *);

lsm_env *tdb_lsm_env(void){
  static int bInit = 0;
  static lsm_env env;
  if( bInit==0 ){
    memcpy(&env, lsm_default_env(), sizeof(env));
    bInit = 1;
  }
  return &env;
}

typedef struct FileSector FileSector;
typedef struct FileData FileData;

struct FileSector {
  u8 *aOld;                       /* Old data for this sector */
};

struct FileData {
  int nSector;                    /* Allocated size of apSector[] array */
  FileSector *aSector;            /* Array of file sectors */
};

/*
** bPrepareCrash:
**   If non-zero, the file wrappers maintain enough in-memory data to
**   simulate the effect of a power-failure on the file-system (i.e. that
**   unsynced sectors may be written, not written, or overwritten with
**   arbitrary data when the crash occurs).
**
** bCrashed:
**   Set to true after a crash is simulated. Once this variable is true, all
**   VFS methods other than xClose() return LSM_IOERR as soon as they are
**   called (without affecting the contents of the file-system).
**
** env:
**   The environment object used by all lsm_db* handles opened by this
**   object (i.e. LsmDb.db plus any worker connections). Variable env.pVfsCtx
**   always points to the containing LsmDb structure.
*/
struct LsmDb {
  TestDb base;                    /* Base class - methods table */
  lsm_env env;                    /* Environment used by connection db */
  char *zName;                    /* Database file name */
  lsm_db *db;                     /* LSM database handle */

  lsm_cursor *pCsr;               /* Cursor held open during read transaction */
  void *pBuf;                     /* Buffer for tdb_fetch() output */
  int nBuf;                       /* Allocated (not used) size of pBuf */

  /* Crash testing related state */
  int bCrashed;                   /* True once a crash has occurred */
  int nAutoCrash;                 /* Number of syncs until a crash */
  int bPrepareCrash;              /* True to store writes in memory */

  /* Unsynced data (while crash testing) */
  int szSector;                   /* Assumed size of disk sectors (512B) */
  FileData aFile[2];              /* Database and log file data */

  /* Other test instrumentation */
  int bNoRecovery;                /* If true, assume DMS2 is locked */

  /* Work hook redirection */
  void (*xWork)(lsm_db *, void *);
  void *pWorkCtx;

  /* IO logging hook */
  void (*xWriteHook)(void *, int, lsm_i64, int, int);
  void *pWriteCtx;
  
  /* Worker threads (for lsm_mt) */
  int nMtMinCkpt;
  int nMtMaxCkpt;
  int eMode;
  int nWorker;
  LsmWorker *aWorker;
};

#define LSMTEST_MODE_SINGLETHREAD    1
#define LSMTEST_MODE_BACKGROUND_CKPT 2
#define LSMTEST_MODE_BACKGROUND_WORK 3
#define LSMTEST_MODE_BACKGROUND_BOTH 4

/*************************************************************************
**************************************************************************
** Begin test VFS code.
*/

struct LsmFile {
  lsm_file *pReal;                /* Real underlying file */
  int bLog;                       /* True for log file. False for db file */
  LsmDb *pDb;                     /* Database handle that uses this file */
};

static int testEnvFullpath(
  lsm_env *pEnv,                  /* Environment for current LsmDb */
  const char *zFile,              /* Relative path name */
  char *zOut,                     /* Output buffer */
  int *pnOut                      /* IN/OUT: Size of output buffer */
){
  lsm_env *pRealEnv = tdb_lsm_env();
  return pRealEnv->xFullpath(pRealEnv, zFile, zOut, pnOut);
}

static int testEnvOpen(
  lsm_env *pEnv,                  /* Environment for current LsmDb */
  const char *zFile,              /* Name of file to open */
  int flags,
  lsm_file **ppFile               /* OUT: New file handle object */
){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmDb *pDb = (LsmDb *)pEnv->pVfsCtx;
  int rc;                         /* Return Code */
  LsmFile *pRet;                  /* The new file handle */
  int nFile;                      /* Length of string zFile in bytes */

  nFile = strlen(zFile);
  pRet = (LsmFile *)testMalloc(sizeof(LsmFile));
  pRet->pDb = pDb;
  pRet->bLog = (nFile > 4 && 0==memcmp("-log", &zFile[nFile-4], 4));

  rc = pRealEnv->xOpen(pRealEnv, zFile, flags, &pRet->pReal);
  if( rc!=LSM_OK ){
    testFree(pRet);
    pRet = 0;
  }

  *ppFile = (lsm_file *)pRet;
  return rc;
}

static int testEnvRead(lsm_file *pFile, lsm_i64 iOff, void *pData, int nData){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmFile *p = (LsmFile *)pFile;
  if( p->pDb->bCrashed ) return LSM_IOERR;
  return pRealEnv->xRead(p->pReal, iOff, pData, nData);
}

static int testEnvWrite(lsm_file *pFile, lsm_i64 iOff, void *pData, int nData){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmFile *p = (LsmFile *)pFile;
  LsmDb *pDb = p->pDb;

  if( pDb->bCrashed ) return LSM_IOERR;

  if( pDb->bPrepareCrash ){
    FileData *pData = &pDb->aFile[p->bLog];
    int iFirst;                 
    int iLast;
    int iSector;

    iFirst = (iOff / pDb->szSector);
    iLast =  ((iOff + nData - 1) / pDb->szSector);

    if( pData->nSector<(iLast+1) ){
      int nNew = ( ((iLast + 1) + 63) / 64 ) * 64;
      assert( nNew>iLast );
      pData->aSector = (FileSector *)testRealloc(
          pData->aSector, nNew*sizeof(FileSector)
      );
      memset(&pData->aSector[pData->nSector], 
          0, (nNew - pData->nSector) * sizeof(FileSector)
      );
      pData->nSector = nNew;
    }

    for(iSector=iFirst; iSector<=iLast; iSector++){
      if( pData->aSector[iSector].aOld==0 ){
        u8 *aOld = (u8 *)testMalloc(pDb->szSector);
        pRealEnv->xRead(
            p->pReal, (lsm_i64)iSector*pDb->szSector, aOld, pDb->szSector
        );
        pData->aSector[iSector].aOld = aOld;
      }
    }
  }

  if( pDb->xWriteHook ){
    int rc;
    int nUs;
    struct timeval t1;
    struct timeval t2;

    gettimeofday(&t1, 0);
    assert( nData>0 );
    rc = pRealEnv->xWrite(p->pReal, iOff, pData, nData);
    gettimeofday(&t2, 0);

    nUs = (t2.tv_sec - t1.tv_sec) * 1000000 + (t2.tv_usec - t1.tv_usec);
    pDb->xWriteHook(pDb->pWriteCtx, p->bLog, iOff, nData, nUs);
    return rc;
  }

  return pRealEnv->xWrite(p->pReal, iOff, pData, nData);
}

static void doSystemCrash(LsmDb *pDb);

static int testEnvSync(lsm_file *pFile){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmFile *p = (LsmFile *)pFile;
  LsmDb *pDb = p->pDb;
  FileData *pData = &pDb->aFile[p->bLog];
  int i;

  if( pDb->bCrashed ) return LSM_IOERR;

  if( pDb->nAutoCrash ){
    pDb->nAutoCrash--;
    if( pDb->nAutoCrash==0 ){
      doSystemCrash(pDb);
      pDb->bCrashed = 1;
      return LSM_IOERR;
    }
  }

  if( pDb->bPrepareCrash ){
    for(i=0; i<pData->nSector; i++){
      testFree(pData->aSector[i].aOld);
      pData->aSector[i].aOld = 0;
    }
  }

  if( pDb->xWriteHook ){
    int rc;
    int nUs;
    struct timeval t1;
    struct timeval t2;

    gettimeofday(&t1, 0);
    rc = pRealEnv->xSync(p->pReal);
    gettimeofday(&t2, 0);

    nUs = (t2.tv_sec - t1.tv_sec) * 1000000 + (t2.tv_usec - t1.tv_usec);
    pDb->xWriteHook(pDb->pWriteCtx, p->bLog, 0, 0, nUs);
    return rc;
  }

  return pRealEnv->xSync(p->pReal);
}

static int testEnvTruncate(lsm_file *pFile, lsm_i64 iOff){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmFile *p = (LsmFile *)pFile;
  if( p->pDb->bCrashed ) return LSM_IOERR;
  return pRealEnv->xTruncate(p->pReal, iOff);
}

static int testEnvSectorSize(lsm_file *pFile){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmFile *p = (LsmFile *)pFile;
  return pRealEnv->xSectorSize(p->pReal);
}

static int testEnvRemap(
  lsm_file *pFile, 
  lsm_i64 iMin, 
  void **ppOut,
  lsm_i64 *pnOut
){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmFile *p = (LsmFile *)pFile;
  return pRealEnv->xRemap(p->pReal, iMin, ppOut, pnOut);
}

static int testEnvFileid(
  lsm_file *pFile, 
  void *ppOut,
  int *pnOut
){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmFile *p = (LsmFile *)pFile;
  return pRealEnv->xFileid(p->pReal, ppOut, pnOut);
}

static int testEnvClose(lsm_file *pFile){
  lsm_env *pRealEnv = tdb_lsm_env();
  LsmFile *p = (LsmFile *)pFile;

  pRealEnv->xClose(p->pReal);
  testFree(p);
  return LSM_OK;
}

static int testEnvUnlink(lsm_env *pEnv, const char *zFile){
  lsm_env *pRealEnv = tdb_lsm_env();
  unused_parameter(pEnv);
  return pRealEnv->xUnlink(pRealEnv, zFile);
}

static int testEnvLock(lsm_file *pFile, int iLock, int eType){
  LsmFile *p = (LsmFile *)pFile;
  lsm_env *pRealEnv = tdb_lsm_env();

  if( iLock==2 && eType==LSM_LOCK_EXCL && p->pDb->bNoRecovery ){
    return LSM_BUSY;
  }
  return pRealEnv->xLock(p->pReal, iLock, eType);
}

static int testEnvTestLock(lsm_file *pFile, int iLock, int nLock, int eType){
  LsmFile *p = (LsmFile *)pFile;
  lsm_env *pRealEnv = tdb_lsm_env();

  if( iLock==2 && eType==LSM_LOCK_EXCL && p->pDb->bNoRecovery ){
    return LSM_BUSY;
  }
  return pRealEnv->xTestLock(p->pReal, iLock, nLock, eType);
}

static int testEnvShmMap(lsm_file *pFile, int iRegion, int sz, void **pp){
  LsmFile *p = (LsmFile *)pFile;
  lsm_env *pRealEnv = tdb_lsm_env();
  return pRealEnv->xShmMap(p->pReal, iRegion, sz, pp);
}

static void testEnvShmBarrier(void){
}

static int testEnvShmUnmap(lsm_file *pFile, int bDel){
  LsmFile *p = (LsmFile *)pFile;
  lsm_env *pRealEnv = tdb_lsm_env();
  return pRealEnv->xShmUnmap(p->pReal, bDel);
}

static int testEnvSleep(lsm_env *pEnv, int us){
  lsm_env *pRealEnv = tdb_lsm_env();
  return pRealEnv->xSleep(pRealEnv, us);
}

static void doSystemCrash(LsmDb *pDb){
  lsm_env *pEnv = tdb_lsm_env();
  int iFile;
  int iSeed = pDb->aFile[0].nSector + pDb->aFile[1].nSector;

  char *zFile = pDb->zName;
  char *zFree = 0;

  for(iFile=0; iFile<2; iFile++){
    lsm_file *pFile = 0;
    int i;

    pEnv->xOpen(pEnv, zFile, 0, &pFile);
    for(i=0; i<pDb->aFile[iFile].nSector; i++){
      u8 *aOld = pDb->aFile[iFile].aSector[i].aOld;
      if( aOld ){
        int iOpt = testPrngValue(iSeed++) % 3;
        switch( iOpt ){
          case 0:
            break;

          case 1:
            testPrngArray(iSeed++, (u32 *)aOld, pDb->szSector/4);
            /* Fall-through */

          case 2:
            pEnv->xWrite(
                pFile, (lsm_i64)i * pDb->szSector, aOld, pDb->szSector
            );
            break;
        }
        testFree(aOld);
        pDb->aFile[iFile].aSector[i].aOld = 0;
      }
    }
    pEnv->xClose(pFile);
    zFree = zFile = sqlite3_mprintf("%s-log", pDb->zName);
  }

  sqlite3_free(zFree);
}
/*
** End test VFS code.
**************************************************************************
*************************************************************************/

/*************************************************************************
**************************************************************************
** Begin test compression hooks.
*/

#ifdef HAVE_ZLIB
#include <zlib.h>

static int testZipBound(void *pCtx, int nSrc){
  return compressBound(nSrc);
}

static int testZipCompress(
  void *pCtx,                     /* Context pointer */
  char *aOut, int *pnOut,         /* OUT: Buffer containing compressed data */
  const char *aIn, int nIn        /* Buffer containing input data */
){
  uLongf n = *pnOut;              /* In/out buffer size for compress() */
  int rc;                         /* compress() return code */
 
  rc = compress((Bytef*)aOut, &n, (Bytef*)aIn, nIn);
  *pnOut = n;
  return (rc==Z_OK ? 0 : LSM_ERROR);
}

static int testZipUncompress(
  void *pCtx,                     /* Context pointer */
  char *aOut, int *pnOut,         /* OUT: Buffer containing uncompressed data */
  const char *aIn, int nIn        /* Buffer containing input data */
){
  uLongf n = *pnOut;              /* In/out buffer size for uncompress() */
  int rc;                         /* uncompress() return code */

  rc = uncompress((Bytef*)aOut, &n, (Bytef*)aIn, nIn);
  *pnOut = n;
  return (rc==Z_OK ? 0 : LSM_ERROR);
}

static int testConfigureCompression(lsm_db *pDb){
  static lsm_compress zip = {
    0,                            /* Context pointer (unused) */
    1,                            /* Id value */
    testZipBound,                 /* xBound method */
    testZipCompress,              /* xCompress method */
    testZipUncompress             /* xUncompress method */
  };
  return lsm_config(pDb, LSM_CONFIG_SET_COMPRESSION, &zip);
}
#endif /* ifdef HAVE_ZLIB */

/*
** End test compression hooks.
**************************************************************************
*************************************************************************/

static int test_lsm_close(TestDb *pTestDb){
  int i;
  int rc = LSM_OK;
  LsmDb *pDb = (LsmDb *)pTestDb;

  lsm_csr_close(pDb->pCsr);
  lsm_close(pDb->db);

  /* If this is a multi-threaded database, wait on the worker threads. */
  mt_shutdown(pDb);
  for(i=0; i<pDb->nWorker && rc==LSM_OK; i++){
    rc = pDb->aWorker[i].worker_rc;
  }

  for(i=0; i<pDb->aFile[0].nSector; i++){
    testFree(pDb->aFile[0].aSector[i].aOld);
  }
  testFree(pDb->aFile[0].aSector);
  for(i=0; i<pDb->aFile[1].nSector; i++){
    testFree(pDb->aFile[1].aSector[i].aOld);
  }
  testFree(pDb->aFile[1].aSector);

  memset(pDb, sizeof(LsmDb), 0x11);
  testFree((char *)pDb->pBuf);
  testFree((char *)pDb);
  return rc;
}

static void mt_signal_worker(LsmDb*, int);

static int waitOnCheckpointer(LsmDb *pDb, lsm_db *db){
  int nSleep = 0;
  int nKB;
  int rc;

  do {
    nKB = 0;
    rc = lsm_info(db, LSM_INFO_CHECKPOINT_SIZE, &nKB);
    if( rc!=LSM_OK || nKB<pDb->nMtMaxCkpt ) break;
#ifdef LSM_MUTEX_PTHREADS
    mt_signal_worker(pDb, 
        (pDb->eMode==LSMTEST_MODE_BACKGROUND_CKPT ? 0 : 1)
    );
#endif
    usleep(5000);
    nSleep += 5;
  }while( 1 );

#if 0
    if( nSleep ) printf("# waitOnCheckpointer(): nSleep=%d\n", nSleep);
#endif

  return rc;
}

static int waitOnWorker(LsmDb *pDb){
  int rc;
  int nLimit = -1;
  int nSleep = 0;

  rc = lsm_config(pDb->db, LSM_CONFIG_AUTOFLUSH, &nLimit);
  do {
    int nOld, nNew, rc;
    rc = lsm_info(pDb->db, LSM_INFO_TREE_SIZE, &nOld, &nNew);
    if( rc!=LSM_OK ) return rc;
    if( nOld==0 || nNew<(nLimit/2) ) break;
#ifdef LSM_MUTEX_PTHREADS
    mt_signal_worker(pDb, 0);
#endif
    usleep(5000);
    nSleep += 5;
  }while( 1 );

#if 0
  if( nSleep ) printf("# waitOnWorker(): nSleep=%d\n", nSleep);
#endif

  return rc;
}

static int test_lsm_write(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void *pVal,
  int nVal
){
  LsmDb *pDb = (LsmDb *)pTestDb;
  int rc = LSM_OK;

  if( pDb->eMode==LSMTEST_MODE_BACKGROUND_CKPT ){
    rc = waitOnCheckpointer(pDb, pDb->db);
  }else if( 
      pDb->eMode==LSMTEST_MODE_BACKGROUND_WORK
   || pDb->eMode==LSMTEST_MODE_BACKGROUND_BOTH 
  ){
    rc = waitOnWorker(pDb);
  }

  if( rc==LSM_OK ){
    rc = lsm_insert(pDb->db, pKey, nKey, pVal, nVal);
  }
  return rc;
}

static int test_lsm_delete(TestDb *pTestDb, void *pKey, int nKey){
  LsmDb *pDb = (LsmDb *)pTestDb;
  return lsm_delete(pDb->db, pKey, nKey);
}

static int test_lsm_delete_range(
  TestDb *pTestDb, 
  void *pKey1, int nKey1,
  void *pKey2, int nKey2
){
  LsmDb *pDb = (LsmDb *)pTestDb;
  return lsm_delete_range(pDb->db, pKey1, nKey1, pKey2, nKey2);
}

static int test_lsm_fetch(
  TestDb *pTestDb, 
  void *pKey, 
  int nKey, 
  void **ppVal, 
  int *pnVal
){
  int rc;
  LsmDb *pDb = (LsmDb *)pTestDb;
  lsm_cursor *csr;

  if( pKey==0 ) return LSM_OK;

  rc = lsm_csr_open(pDb->db, &csr);
  if( rc!=LSM_OK ) return rc;

  rc = lsm_csr_seek(csr, pKey, nKey, LSM_SEEK_EQ);
  if( rc==LSM_OK ){
    if( lsm_csr_valid(csr) ){
      const void *pVal; int nVal;
      rc = lsm_csr_value(csr, &pVal, &nVal);
      if( nVal>pDb->nBuf ){
        testFree(pDb->pBuf);
        pDb->pBuf = testMalloc(nVal*2);
        pDb->nBuf = nVal*2;
      }
      memcpy(pDb->pBuf, pVal, nVal);
      *ppVal = pDb->pBuf;
      *pnVal = nVal;
    }else{
      *ppVal = 0;
      *pnVal = -1;
    }
  }
  lsm_csr_close(csr);
  return rc;
}

static int test_lsm_scan(
  TestDb *pTestDb,
  void *pCtx,
  int bReverse,
  void *pFirst, int nFirst,
  void *pLast, int nLast,
  void (*xCallback)(void *, void *, int , void *, int)
){
  LsmDb *pDb = (LsmDb *)pTestDb;
  lsm_cursor *csr;
  int rc;

  rc = lsm_csr_open(pDb->db, &csr);
  if( rc!=LSM_OK ) return rc;

  if( bReverse ){
    if( pLast ){
      rc = lsm_csr_seek(csr, pLast, nLast, LSM_SEEK_LE);
    }else{
      rc = lsm_csr_last(csr);
    }
  }else{
    if( pFirst ){
      rc = lsm_csr_seek(csr, pFirst, nFirst, LSM_SEEK_GE);
    }else{
      rc = lsm_csr_first(csr);
    }
  }

  while( rc==LSM_OK && lsm_csr_valid(csr) ){
    const void *pKey; int nKey;
    const void *pVal; int nVal;
    int cmp;

    lsm_csr_key(csr, &pKey, &nKey);
    lsm_csr_value(csr, &pVal, &nVal);

    if( bReverse && pFirst ){
      cmp = memcmp(pFirst, pKey, MIN(nKey, nFirst));
      if( cmp>0 || (cmp==0 && nFirst>nKey) ) break;
    }else if( bReverse==0 && pLast ){
      cmp = memcmp(pLast, pKey, MIN(nKey, nLast));
      if( cmp<0 || (cmp==0 && nLast<nKey) ) break;
    }

    xCallback(pCtx, (void *)pKey, nKey, (void *)pVal, nVal);

    if( bReverse ){
      rc = lsm_csr_prev(csr);
    }else{
      rc = lsm_csr_next(csr);
    }
  }

  lsm_csr_close(csr);
  return rc;
}

static int test_lsm_begin(TestDb *pTestDb, int iLevel){
  int rc = LSM_OK;
  LsmDb *pDb = (LsmDb *)pTestDb;

  /* iLevel==0 is a no-op. */
  if( iLevel==0 ) return 0;

  if( pDb->pCsr==0 ) rc = lsm_csr_open(pDb->db, &pDb->pCsr);
  if( rc==LSM_OK && iLevel>1 ){
    rc = lsm_begin(pDb->db, iLevel-1);
  }

  return rc;
}
static int test_lsm_commit(TestDb *pTestDb, int iLevel){
  LsmDb *pDb = (LsmDb *)pTestDb;

  /* If iLevel==0, close any open read transaction */
  if( iLevel==0 && pDb->pCsr ){
    lsm_csr_close(pDb->pCsr);
    pDb->pCsr = 0;
  }

  /* If iLevel==0, close any open read transaction */
  return lsm_commit(pDb->db, MAX(0, iLevel-1));
}
static int test_lsm_rollback(TestDb *pTestDb, int iLevel){
  LsmDb *pDb = (LsmDb *)pTestDb;

  /* If iLevel==0, close any open read transaction */
  if( iLevel==0 && pDb->pCsr ){
    lsm_csr_close(pDb->pCsr);
    pDb->pCsr = 0;
  }

  return lsm_rollback(pDb->db, MAX(0, iLevel-1));
}

/*
** A log message callback registered with lsm connections. Prints all 
** messages to stderr.
*/
static void xLog(void *pCtx, int rc, const char *z){
  unused_parameter(rc);
  /* fprintf(stderr, "lsm: rc=%d \"%s\"\n", rc, z); */
  if( pCtx ) fprintf(stderr, "%s: ", (char *)pCtx);
  fprintf(stderr, "%s\n", z);
  fflush(stderr);
}

static void xWorkHook(lsm_db *db, void *pArg){
  LsmDb *p = (LsmDb *)pArg;
  if( p->xWork ) p->xWork(db, p->pWorkCtx);
}

#define TEST_NO_RECOVERY -1
#define TEST_COMPRESSION -3

#define TEST_MT_MODE     -2
#define TEST_MT_MIN_CKPT -4
#define TEST_MT_MAX_CKPT -5

int test_lsm_config_str(
  LsmDb *pLsm,
  lsm_db *db, 
  int bWorker,
  const char *zStr,
  int *pnThread
){
  struct CfgParam {
    const char *zParam;
    int bWorker;
    int eParam;
  } aParam[] = {
    { "autoflush",        0, LSM_CONFIG_AUTOFLUSH },
    { "page_size",        0, LSM_CONFIG_PAGE_SIZE },
    { "block_size",       0, LSM_CONFIG_BLOCK_SIZE },
    { "safety",           0, LSM_CONFIG_SAFETY },
    { "autowork",         0, LSM_CONFIG_AUTOWORK },
    { "autocheckpoint",   0, LSM_CONFIG_AUTOCHECKPOINT },
    { "mmap",             0, LSM_CONFIG_MMAP },
    { "use_log",          0, LSM_CONFIG_USE_LOG },
    { "automerge",        0, LSM_CONFIG_AUTOMERGE },
    { "max_freelist",     0, LSM_CONFIG_MAX_FREELIST },
    { "multi_proc",       0, LSM_CONFIG_MULTIPLE_PROCESSES },
    { "worker_automerge", 1, LSM_CONFIG_AUTOMERGE },
    { "test_no_recovery", 0, TEST_NO_RECOVERY },
    { "bg_min_ckpt",      0, TEST_NO_RECOVERY },

    { "mt_mode",          0, TEST_MT_MODE },
    { "mt_min_ckpt",      0, TEST_MT_MIN_CKPT },
    { "mt_max_ckpt",      0, TEST_MT_MAX_CKPT },

#ifdef HAVE_ZLIB
    { "compression",      0, TEST_COMPRESSION },
#endif
    { 0, 0 }
  };
  const char *z = zStr;
  int nThread = 1;

  if( zStr==0 ) return 0;

  assert( db );
  while( z[0] ){
    const char *zStart;

    /* Skip whitespace */
    while( *z==' ' ) z++;
    zStart = z;

    while( *z && *z!='=' ) z++;
    if( *z ){
      int eParam;
      int i;
      int iVal;
      int iMul = 1;
      int rc;
      char zParam[32];
      int nParam = z-zStart;
      if( nParam==0 || nParam>sizeof(zParam)-1 ) goto syntax_error;

      memcpy(zParam, zStart, nParam);
      zParam[nParam] = '\0';
      rc = testArgSelect(aParam, "param", zParam, &i);
      if( rc!=0 ) return rc;
      eParam = aParam[i].eParam;

      z++;
      zStart = z;
      while( *z>='0' && *z<='9' ) z++;
      if( *z=='k' || *z=='K' ){
        iMul = 1;
        z++;
      }else if( *z=='M' || *z=='M' ){
        iMul = 1024;
        z++;
      }
      nParam = z-zStart;
      if( nParam==0 || nParam>sizeof(zParam)-1 ) goto syntax_error;
      memcpy(zParam, zStart, nParam);
      zParam[nParam] = '\0';
      iVal = atoi(zParam) * iMul;

      if( eParam>0 ){
        if( bWorker || aParam[i].bWorker==0 ){
          lsm_config(db, eParam, &iVal);
        }
      }else{
        switch( eParam ){
          case TEST_NO_RECOVERY:
            if( pLsm ) pLsm->bNoRecovery = iVal;
            break;
          case TEST_MT_MODE:
            if( pLsm ) nThread = iVal;
            break;
          case TEST_MT_MIN_CKPT:
            if( pLsm && iVal>0 ) pLsm->nMtMinCkpt = iVal*1024;
            break;
          case TEST_MT_MAX_CKPT:
            if( pLsm && iVal>0 ) pLsm->nMtMaxCkpt = iVal*1024;
            break;
#ifdef HAVE_ZLIB
          case TEST_COMPRESSION:
            testConfigureCompression(db);
            break;
#endif
        }
      }
    }else if( z!=zStart ){
      goto syntax_error;
    }
  }

  if( pnThread ) *pnThread = nThread;
  if( pLsm && pLsm->nMtMaxCkpt < pLsm->nMtMinCkpt ){
    pLsm->nMtMinCkpt = pLsm->nMtMaxCkpt;
  }

  return 0;
 syntax_error:
  testPrintError("syntax error at: \"%s\"\n", z);
  return 1;
}

int tdb_lsm_config_str(TestDb *pDb, const char *zStr){
  int rc = 0;
  if( tdb_lsm(pDb) ){
    int i;
    LsmDb *pLsm = (LsmDb *)pDb;

    rc = test_lsm_config_str(pLsm, pLsm->db, 0, zStr, 0);
#ifdef LSM_MUTEX_PTHREADS
    for(i=0; rc==0 && i<pLsm->nWorker; i++){
      rc = test_lsm_config_str(0, pLsm->aWorker[i].pWorker, 1, zStr, 0);
    }
#endif
  }
  return rc;
}

int tdb_lsm_configure(lsm_db *db, const char *zConfig){
  return test_lsm_config_str(0, db, 0, zConfig, 0);
}

static int testLsmStartWorkers(LsmDb *, int, const char *, const char *);

static int testLsmOpen(
  const char *zCfg,
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  static const DatabaseMethods LsmMethods = {
    test_lsm_close,
    test_lsm_write,
    test_lsm_delete,
    test_lsm_delete_range,
    test_lsm_fetch,
    test_lsm_scan,
    test_lsm_begin,
    test_lsm_commit,
    test_lsm_rollback
  };

  int rc;
  int nFilename;
  LsmDb *pDb;

  /* If the bClear flag is set, delete any existing database. */
  assert( zFilename);
  if( bClear ) testDeleteLsmdb(zFilename);
  nFilename = strlen(zFilename);

  pDb = (LsmDb *)testMalloc(sizeof(LsmDb) + nFilename + 1);
  memset(pDb, 0, sizeof(LsmDb));
  pDb->base.pMethods = &LsmMethods;
  pDb->zName = (char *)&pDb[1];
  memcpy(pDb->zName, zFilename, nFilename + 1);

  /* Default the sector size used for crash simulation to 512 bytes. 
  ** Todo: There should be an OS method to obtain this value - just as
  ** there is in SQLite. For now, LSM assumes that it is smaller than
  ** the page size (default 4KB).
  */
  pDb->szSector = 256;

  /* Default values for the mt_min_ckpt and mt_max_ckpt parameters. */
  pDb->nMtMinCkpt = LSMTEST_DFLT_MT_MIN_CKPT;
  pDb->nMtMaxCkpt = LSMTEST_DFLT_MT_MAX_CKPT;

  memcpy(&pDb->env, tdb_lsm_env(), sizeof(lsm_env));
  pDb->env.pVfsCtx = (void *)pDb;
  pDb->env.xFullpath = testEnvFullpath;
  pDb->env.xOpen = testEnvOpen;
  pDb->env.xRead = testEnvRead;
  pDb->env.xWrite = testEnvWrite;
  pDb->env.xTruncate = testEnvTruncate;
  pDb->env.xSync = testEnvSync;
  pDb->env.xSectorSize = testEnvSectorSize;
  pDb->env.xRemap = testEnvRemap;
  pDb->env.xFileid = testEnvFileid;
  pDb->env.xClose = testEnvClose;
  pDb->env.xUnlink = testEnvUnlink;
  pDb->env.xLock = testEnvLock;
  pDb->env.xTestLock = testEnvTestLock;
  pDb->env.xShmBarrier = testEnvShmBarrier;
  pDb->env.xShmMap = testEnvShmMap;
  pDb->env.xShmUnmap = testEnvShmUnmap;
  pDb->env.xSleep = testEnvSleep;

  rc = lsm_new(&pDb->env, &pDb->db);
  if( rc==LSM_OK ){
    int nThread = 1;
    lsm_config_log(pDb->db, xLog, 0);
    lsm_config_work_hook(pDb->db, xWorkHook, (void *)pDb);

    rc = test_lsm_config_str(pDb, pDb->db, 0, zCfg, &nThread);
    if( rc==LSM_OK ) rc = lsm_open(pDb->db, zFilename);

    pDb->eMode = nThread;
#ifdef LSM_MUTEX_PTHREADS
    if( rc==LSM_OK && nThread>1 ){
      testLsmStartWorkers(pDb, nThread, zFilename, zCfg);
    }
#endif

    if( rc!=LSM_OK ){
      test_lsm_close((TestDb *)pDb);
      pDb = 0;
    }
  }

  *ppDb = (TestDb *)pDb;
  return rc;
}

int test_lsm_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  return testLsmOpen(zSpec, zFilename, bClear, ppDb);
}

int test_lsm_small_open(
  const char *zSpec, 
  const char *zFile, 
  int bClear, 
  TestDb **ppDb
){
  const char *zCfg = "page_size=256 block_size=64 mmap=1024";
  return testLsmOpen(zCfg, zFile, bClear, ppDb);
}

int test_lsm_lomem_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
    /* "max_freelist=4 autocheckpoint=32" */
  const char *zCfg = 
    "page_size=256 block_size=64 autoflush=16 "
    "autocheckpoint=32"
    "mmap=0 "
  ;
  return testLsmOpen(zCfg, zFilename, bClear, ppDb);
}

int test_lsm_zip_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  const char *zCfg = 
    "page_size=256 block_size=64 autoflush=16 "
    "autocheckpoint=32 compression=1 mmap=0 "
  ;
  return testLsmOpen(zCfg, zFilename, bClear, ppDb);
}

lsm_db *tdb_lsm(TestDb *pDb){
  if( pDb->pMethods->xClose==test_lsm_close ){
    return ((LsmDb *)pDb)->db;
  }
  return 0;
}

int tdb_lsm_multithread(TestDb *pDb){
  int ret = 0;
  if( tdb_lsm(pDb) ){
    ret = ((LsmDb*)pDb)->eMode!=LSMTEST_MODE_SINGLETHREAD;
  }
  return ret;
}

void tdb_lsm_enable_log(TestDb *pDb, int bEnable){
  lsm_db *db = tdb_lsm(pDb);
  if( db ){
    lsm_config_log(db, (bEnable ? xLog : 0), (void *)"client");
  }
}

void tdb_lsm_application_crash(TestDb *pDb){
  if( tdb_lsm(pDb) ){
    LsmDb *p = (LsmDb *)pDb;
    p->bCrashed = 1;
  }
}

void tdb_lsm_prepare_system_crash(TestDb *pDb){
  if( tdb_lsm(pDb) ){
    LsmDb *p = (LsmDb *)pDb;
    p->bPrepareCrash = 1;
  }
}

void tdb_lsm_system_crash(TestDb *pDb){
  if( tdb_lsm(pDb) ){
    LsmDb *p = (LsmDb *)pDb;
    p->bCrashed = 1;
    doSystemCrash(p);
  }
}

void tdb_lsm_safety(TestDb *pDb, int eMode){
  assert( eMode==LSM_SAFETY_OFF 
       || eMode==LSM_SAFETY_NORMAL 
       || eMode==LSM_SAFETY_FULL 
  );
  if( tdb_lsm(pDb) ){
    int iParam = eMode;
    LsmDb *p = (LsmDb *)pDb;
    lsm_config(p->db, LSM_CONFIG_SAFETY, &iParam);
  }
}

void tdb_lsm_prepare_sync_crash(TestDb *pDb, int iSync){
  assert( iSync>0 );
  if( tdb_lsm(pDb) ){
    LsmDb *p = (LsmDb *)pDb;
    p->nAutoCrash = iSync;
    p->bPrepareCrash = 1;
  }
}

void tdb_lsm_config_work_hook(
  TestDb *pDb, 
  void (*xWork)(lsm_db *, void *), 
  void *pWorkCtx
){
  if( tdb_lsm(pDb) ){
    LsmDb *p = (LsmDb *)pDb;
    p->xWork = xWork;
    p->pWorkCtx = pWorkCtx;
  }
}

void tdb_lsm_write_hook(
  TestDb *pDb, 
  void (*xWrite)(void *, int, lsm_i64, int, int),
  void *pWriteCtx
){
  if( tdb_lsm(pDb) ){
    LsmDb *p = (LsmDb *)pDb;
    p->xWriteHook = xWrite;
    p->pWriteCtx = pWriteCtx;
  }
}

int tdb_lsm_open(const char *zCfg, const char *zDb, int bClear, TestDb **ppDb){
  return testLsmOpen(zCfg, zDb, bClear, ppDb);
}

#ifdef LSM_MUTEX_PTHREADS

/*
** Signal worker thread iWorker that there may be work to do.
*/
static void mt_signal_worker(LsmDb *pDb, int iWorker){
  LsmWorker *p = &pDb->aWorker[iWorker];
  pthread_mutex_lock(&p->worker_mutex);
  p->bDoWork = 1;
  pthread_cond_signal(&p->worker_cond);
  pthread_mutex_unlock(&p->worker_mutex);
}

/*
** This routine is used as the main() for all worker threads.
*/
static void *worker_main(void *pArg){
  LsmWorker *p = (LsmWorker *)pArg;
  lsm_db *pWorker;                /* Connection to access db through */

  pthread_mutex_lock(&p->worker_mutex);
  while( (pWorker = p->pWorker) ){
    int rc = LSM_OK;

    /* Do some work. If an error occurs, exit. */

    pthread_mutex_unlock(&p->worker_mutex);
    if( p->eType==LSMTEST_THREAD_CKPT ){
      int nKB = 0;
      rc = lsm_info(pWorker, LSM_INFO_CHECKPOINT_SIZE, &nKB);
      if( rc==LSM_OK && nKB>=p->pDb->nMtMinCkpt ){
        rc = lsm_checkpoint(pWorker, 0);
      }
    }else{
      int nWrite;
      do {

        if( p->eType==LSMTEST_THREAD_WORKER ){
          waitOnCheckpointer(p->pDb, pWorker);
        }

        nWrite = 0;
        rc = lsm_work(pWorker, 0, 256, &nWrite);

        if( p->eType==LSMTEST_THREAD_WORKER && nWrite ){
          mt_signal_worker(p->pDb, 1);
        }
      }while( nWrite && p->pWorker );
    }
    pthread_mutex_lock(&p->worker_mutex);

    if( rc!=LSM_OK && rc!=LSM_BUSY ){
      p->worker_rc = rc;
      break;
    }

    /* The thread will wake up when it is signaled either because another
    ** thread has created some work for this one or because the connection
    ** is being closed.  */
    if( p->pWorker && p->bDoWork==0 ){
      pthread_cond_wait(&p->worker_cond, &p->worker_mutex);
    }
    p->bDoWork = 0;
  }
  pthread_mutex_unlock(&p->worker_mutex);
  
  return 0;
}


static void mt_stop_worker(LsmDb *pDb, int iWorker){
  LsmWorker *p = &pDb->aWorker[iWorker];
  if( p->pWorker ){
    void *pDummy;
    lsm_db *pWorker;

    /* Signal the worker to stop */
    pthread_mutex_lock(&p->worker_mutex);
    pWorker = p->pWorker;
    p->pWorker = 0;
    pthread_cond_signal(&p->worker_cond);
    pthread_mutex_unlock(&p->worker_mutex);

    /* Join the worker thread. */
    pthread_join(p->worker_thread, &pDummy);

    /* Free resources allocated in mt_start_worker() */
    pthread_cond_destroy(&p->worker_cond);
    pthread_mutex_destroy(&p->worker_mutex);
    lsm_close(pWorker);
  }
}

static void mt_shutdown(LsmDb *pDb){
  int i;
  for(i=0; i<pDb->nWorker; i++){
    mt_stop_worker(pDb, i);
  }
}

/*
** This callback is invoked by LSM when the client database writes to
** the database file (i.e. to flush the contents of the in-memory tree).
** This implies there may be work to do on the database, so signal
** the worker threads.
*/
static void mt_client_work_hook(lsm_db *db, void *pArg){
  LsmDb *pDb = (LsmDb *)pArg;     /* LsmDb database handle */

  /* Invoke the user level work-hook, if any. */
  if( pDb->xWork ) pDb->xWork(db, pDb->pWorkCtx);

  /* Wake up worker thread 0. */
  mt_signal_worker(pDb, 0);
}

static void mt_worker_work_hook(lsm_db *db, void *pArg){
  LsmDb *pDb = (LsmDb *)pArg;     /* LsmDb database handle */

  /* Invoke the user level work-hook, if any. */
  if( pDb->xWork ) pDb->xWork(db, pDb->pWorkCtx);
}

/*
** Launch worker thread iWorker for database connection pDb.
*/
static int mt_start_worker(
  LsmDb *pDb,                     /* Main database structure */
  int iWorker,                    /* Worker number to start */
  const char *zFilename,          /* File name of database to open */
  const char *zCfg,               /* Connection configuration string */
  int eType                       /* Type of worker thread */
){
  int rc = 0;                     /* Return code */
  LsmWorker *p;                   /* Object to initialize */

  assert( iWorker<pDb->nWorker );
  assert( eType==LSMTEST_THREAD_CKPT 
       || eType==LSMTEST_THREAD_WORKER 
       || eType==LSMTEST_THREAD_WORKER_AC 
  );

  p = &pDb->aWorker[iWorker];
  p->eType = eType;
  p->pDb = pDb;

  /* Open the worker connection */
  if( rc==0 ) rc = lsm_new(&pDb->env, &p->pWorker);
  if( zCfg ){
    test_lsm_config_str(pDb, p->pWorker, 1, zCfg, 0);
  }
  if( rc==0 ) rc = lsm_open(p->pWorker, zFilename);
  lsm_config_log(p->pWorker, xLog, (void *)"worker");

  /* Configure the work-hook */
  if( rc==0 ){
    lsm_config_work_hook(p->pWorker, mt_worker_work_hook, (void *)pDb);
  }

  if( eType==LSMTEST_THREAD_WORKER ){
    test_lsm_config_str(0, p->pWorker, 1, "autocheckpoint=0", 0);
  }

  /* Kick off the worker thread. */
  if( rc==0 ) rc = pthread_cond_init(&p->worker_cond, 0);
  if( rc==0 ) rc = pthread_mutex_init(&p->worker_mutex, 0);
  if( rc==0 ) rc = pthread_create(&p->worker_thread, 0, worker_main, (void *)p);

  return rc;
}


static int testLsmStartWorkers(
  LsmDb *pDb, int eModel, const char *zFilename, const char *zCfg
){
  int rc;

  if( eModel<1 || eModel>4 ) return 1;
  if( eModel==1 ) return 0;

  /* Configure a work-hook for the client connection. Worker 0 is signalled
  ** every time the users connection writes to the database.  */
  lsm_config_work_hook(pDb->db, mt_client_work_hook, (void *)pDb);

  /* Allocate space for two worker connections. They may not both be
  ** used, but both are allocated.  */
  pDb->aWorker = (LsmWorker *)testMalloc(sizeof(LsmWorker) * 2);
  memset(pDb->aWorker, 0, sizeof(LsmWorker) * 2);

  switch( eModel ){
    case LSMTEST_MODE_BACKGROUND_CKPT:
      pDb->nWorker = 1;
      test_lsm_config_str(0, pDb->db, 0, "autocheckpoint=0", 0);
      rc = mt_start_worker(pDb, 0, zFilename, zCfg, LSMTEST_THREAD_CKPT);
      break;

    case LSMTEST_MODE_BACKGROUND_WORK:
      pDb->nWorker = 1;
      test_lsm_config_str(0, pDb->db, 0, "autowork=0", 0);
      rc = mt_start_worker(pDb, 0, zFilename, zCfg, LSMTEST_THREAD_WORKER_AC);
      break;

    case LSMTEST_MODE_BACKGROUND_BOTH:
      pDb->nWorker = 2;
      test_lsm_config_str(0, pDb->db, 0, "autowork=0", 0);
      rc = mt_start_worker(pDb, 0, zFilename, zCfg, LSMTEST_THREAD_WORKER);
      if( rc==0 ){
        rc = mt_start_worker(pDb, 1, zFilename, zCfg, LSMTEST_THREAD_CKPT);
      }
      break;
  }

  return rc;
}


int test_lsm_mt2(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  const char *zCfg = "mt_mode=2";
  return testLsmOpen(zCfg, zFilename, bClear, ppDb);
}

int test_lsm_mt3(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  const char *zCfg = "mt_mode=4";
  return testLsmOpen(zCfg, zFilename, bClear, ppDb);
}

#else
static void mt_shutdown(LsmDb *pDb) { 
  unused_parameter(pDb); 
}
int test_lsm_mt(const char *zFilename, int bClear, TestDb **ppDb){
  unused_parameter(zFilename);
  unused_parameter(bClear);
  unused_parameter(ppDb);
  testPrintError("threads unavailable - recompile with LSM_MUTEX_PTHREADS\n");
  return 1;
}
#endif

Added ext/lsm1/lsm-test/lsmtest_tdb4.c.













































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
** This file contains the TestDb bt wrapper.
*/

#include "lsmtest_tdb.h"
#include "lsmtest.h"
#include <unistd.h>
#include "bt.h"

#include <pthread.h>

typedef struct BtDb BtDb;
typedef struct BtFile BtFile;

/* Background checkpointer interface (see implementations below). */
typedef struct bt_ckpter bt_ckpter;
static int bgc_attach(BtDb *pDb, const char*);
static int bgc_detach(BtDb *pDb);

/*
** Each database or log file opened by a database handle is wrapped by
** an object of the following type.
*/
struct BtFile {
  BtDb *pBt;                      /* Database handle that opened this file */
  bt_env *pVfs;                   /* Underlying VFS */
  bt_file *pFile;                 /* File handle belonging to underlying VFS */
  int nSectorSize;                /* Size of sectors in bytes */
  int nSector;                    /* Allocated size of nSector array */
  u8 **apSector;                  /* Original sector data */
};

/*
** nCrashSync:
**   If this value is non-zero, then a "crash-test" is running. If
**   nCrashSync==1, then the crash is simulated during the very next 
**   call to the xSync() VFS method (on either the db or log file).
**   If nCrashSync==2, the following call to xSync(), and so on.
**
** bCrash:
**   After a crash is simulated, this variable is set. Any subsequent
**   attempts to write to a file or modify the file system in any way 
**   fail once this is set. All the caller can do is close the connection.
**
** bFastInsert:
**   If this variable is set to true, then a BT_CONTROL_FAST_INSERT_OP
**   control is issued before each callto BtReplace() or BtCsrOpen().
*/
struct BtDb {
  TestDb base;                    /* Base class */
  bt_db *pBt;                     /* bt database handle */
  sqlite4_env *pEnv;              /* SQLite environment (for malloc/free) */
  bt_env *pVfs;                   /* Underlying VFS */
  int bFastInsert;                /* True to use fast-insert */

  /* Space for bt_fetch() results */
  u8 *aBuffer;                    /* Space to store results */
  int nBuffer;                    /* Allocated size of aBuffer[] in bytes */
  int nRef;

  /* Background checkpointer used by mt connections */
  bt_ckpter *pCkpter;

  /* Stuff used for crash test simulation */
  BtFile *apFile[2];              /* Database and log files used by pBt */
  bt_env env;                     /* Private VFS for this object */
  int nCrashSync;                 /* Number of syncs until crash (see above) */
  int bCrash;                     /* True once a crash has been simulated */
};

static int btVfsFullpath(
  sqlite4_env *pEnv, 
  bt_env *pVfs, 
  const char *z, 
  char **pzOut
){
  BtDb *pBt = (BtDb*)pVfs->pVfsCtx;
  if( pBt->bCrash ) return SQLITE4_IOERR;
  return pBt->pVfs->xFullpath(pEnv, pBt->pVfs, z, pzOut);
}

static int btVfsOpen(
  sqlite4_env *pEnv, 
  bt_env *pVfs, 
  const char *zFile, 
  int flags, bt_file **ppFile
){
  BtFile *p;
  BtDb *pBt = (BtDb*)pVfs->pVfsCtx;
  int rc;

  if( pBt->bCrash ) return SQLITE4_IOERR;

  p = (BtFile*)testMalloc(sizeof(BtFile));
  if( !p ) return SQLITE4_NOMEM;
  if( flags & BT_OPEN_DATABASE ){
    pBt->apFile[0] = p;
  }else if( flags & BT_OPEN_LOG ){
    pBt->apFile[1] = p;
  }
  if( (flags & BT_OPEN_SHARED)==0 ){
    p->pBt = pBt; 
  }
  p->pVfs = pBt->pVfs; 

  rc = pBt->pVfs->xOpen(pEnv, pVfs, zFile, flags, &p->pFile);
  if( rc!=SQLITE4_OK ){
    testFree(p);
    p = 0;
  }else{
    pBt->nRef++;
  }

  *ppFile = (bt_file*)p;
  return rc;
}

static int btVfsSize(bt_file *pFile, sqlite4_int64 *piRes){
  BtFile *p = (BtFile*)pFile;
  if( p->pBt && p->pBt->bCrash ) return SQLITE4_IOERR;
  return p->pVfs->xSize(p->pFile, piRes);
}

static int btVfsRead(bt_file *pFile, sqlite4_int64 iOff, void *pBuf, int nBuf){
  BtFile *p = (BtFile*)pFile;
  if( p->pBt && p->pBt->bCrash ) return SQLITE4_IOERR;
  return p->pVfs->xRead(p->pFile, iOff, pBuf, nBuf);
}

static int btFlushSectors(BtFile *p, int iFile){
  sqlite4_int64 iSz;
  int rc;
  int i;
  u8 *aTmp = 0;

  rc = p->pBt->pVfs->xSize(p->pFile, &iSz);
  for(i=0; rc==SQLITE4_OK && i<p->nSector; i++){
    if( p->pBt->bCrash && p->apSector[i] ){

      /* The system is simulating a crash. There are three choices for
      ** this sector:
      **
      **   1) Leave it as it is (simulating a successful write),
      **   2) Restore the original data (simulating a lost write),
      **   3) Populate the disk sector with garbage data.
      */
      sqlite4_int64 iSOff = p->nSectorSize*i;
      int nWrite = MIN(p->nSectorSize, iSz - iSOff);

      if( nWrite ){
        u8 *aWrite = 0;
        int iOpt = (testPrngValue(i) % 3) + 1;
        if( iOpt==1 ){
          aWrite = p->apSector[i];
        }else if( iOpt==3 ){
          if( aTmp==0 ) aTmp = testMalloc(p->nSectorSize);
          aWrite = aTmp;
          testPrngArray(i*13, (u32*)aWrite, nWrite/sizeof(u32));
        }

#if 0
fprintf(stderr, "handle sector %d of %s with %s\n", i, 
    iFile==0 ? "db" : "log",
    iOpt==1 ? "rollback" : iOpt==2 ? "write" : "omit"
);
fflush(stderr);
#endif

        if( aWrite ){
          rc = p->pBt->pVfs->xWrite(p->pFile, iSOff, aWrite, nWrite);
        }
      }
    }
    testFree(p->apSector[i]);
    p->apSector[i] = 0;
  }

  testFree(aTmp);
  return rc;
}

static int btSaveSectors(BtFile *p, sqlite4_int64 iOff, int nBuf){
  int rc;
  sqlite4_int64 iSz;              /* Size of file on disk */
  int iFirst;                     /* First sector affected */
  int iSector;                    /* Current sector */
  int iLast;                      /* Last sector affected */

  if( p->nSectorSize==0 ){
    p->nSectorSize = p->pBt->pVfs->xSectorSize(p->pFile);
    if( p->nSectorSize<512 ) p->nSectorSize = 512;
  }
  iLast = (iOff+nBuf-1) / p->nSectorSize;
  iFirst = iOff / p->nSectorSize;

  rc = p->pBt->pVfs->xSize(p->pFile, &iSz);
  for(iSector=iFirst; rc==SQLITE4_OK && iSector<=iLast; iSector++){
    int nRead;
    sqlite4_int64 iSOff = iSector * p->nSectorSize;
    u8 *aBuf = testMalloc(p->nSectorSize);
    nRead = MIN(p->nSectorSize, (iSz - iSOff));
    if( nRead>0 ){
      rc = p->pBt->pVfs->xRead(p->pFile, iSOff, aBuf, nRead);
    }

    while( rc==SQLITE4_OK && iSector>=p->nSector ){
      int nNew = p->nSector + 32;
      u8 **apNew = (u8**)testMalloc(nNew * sizeof(u8*));
      memcpy(apNew, p->apSector, p->nSector*sizeof(u8*));
      testFree(p->apSector);
      p->apSector = apNew;
      p->nSector = nNew;
    }

    p->apSector[iSector] = aBuf;
  }

  return rc;
}

static int btVfsWrite(bt_file *pFile, sqlite4_int64 iOff, void *pBuf, int nBuf){
  BtFile *p = (BtFile*)pFile;
  if( p->pBt && p->pBt->bCrash ) return SQLITE4_IOERR;
  if( p->pBt && p->pBt->nCrashSync ){
    btSaveSectors(p, iOff, nBuf);
  }
  return p->pVfs->xWrite(p->pFile, iOff, pBuf, nBuf);
}

static int btVfsTruncate(bt_file *pFile, sqlite4_int64 iOff){
  BtFile *p = (BtFile*)pFile;
  if( p->pBt && p->pBt->bCrash ) return SQLITE4_IOERR;
  return p->pVfs->xTruncate(p->pFile, iOff);
}

static int btVfsSync(bt_file *pFile){
  int rc = SQLITE4_OK;
  BtFile *p = (BtFile*)pFile;
  BtDb *pBt = p->pBt;

  if( pBt ){
    if( pBt->bCrash ) return SQLITE4_IOERR;
    if( pBt->nCrashSync ){
      pBt->nCrashSync--;
      pBt->bCrash = (pBt->nCrashSync==0);
      if( pBt->bCrash ){
        btFlushSectors(pBt->apFile[0], 0);
        btFlushSectors(pBt->apFile[1], 1);
        rc = SQLITE4_IOERR;
      }else{
        btFlushSectors(p, 0);
      }
    }
  }

  if( rc==SQLITE4_OK ){
    rc = p->pVfs->xSync(p->pFile);
  }
  return rc;
}

static int btVfsSectorSize(bt_file *pFile){
  BtFile *p = (BtFile*)pFile;
  return p->pVfs->xSectorSize(p->pFile);
}

static void btDeref(BtDb *p){
  p->nRef--;
  assert( p->nRef>=0 );
  if( p->nRef<=0 ) testFree(p);
}

static int btVfsClose(bt_file *pFile){
  BtFile *p = (BtFile*)pFile;
  BtDb *pBt = p->pBt;
  int rc;
  if( pBt ){
    btFlushSectors(p, 0);
    if( p==pBt->apFile[0] ) pBt->apFile[0] = 0;
    if( p==pBt->apFile[1] ) pBt->apFile[1] = 0;
  }
  testFree(p->apSector);
  rc = p->pVfs->xClose(p->pFile);
#if 0
  btDeref(p->pBt);
#endif
  testFree(p);
  return rc;
}

static int btVfsUnlink(sqlite4_env *pEnv, bt_env *pVfs, const char *zFile){
  BtDb *pBt = (BtDb*)pVfs->pVfsCtx;
  if( pBt->bCrash ) return SQLITE4_IOERR;
  return pBt->pVfs->xUnlink(pEnv, pBt->pVfs, zFile);
}

static int btVfsLock(bt_file *pFile, int iLock, int eType){
  BtFile *p = (BtFile*)pFile;
  if( p->pBt && p->pBt->bCrash ) return SQLITE4_IOERR;
  return p->pVfs->xLock(p->pFile, iLock, eType);
}

static int btVfsTestLock(bt_file *pFile, int iLock, int nLock, int eType){
  BtFile *p = (BtFile*)pFile;
  if( p->pBt && p->pBt->bCrash ) return SQLITE4_IOERR;
  return p->pVfs->xTestLock(p->pFile, iLock, nLock, eType);
}

static int btVfsShmMap(bt_file *pFile, int iChunk, int sz, void **ppOut){
  BtFile *p = (BtFile*)pFile;
  if( p->pBt && p->pBt->bCrash ) return SQLITE4_IOERR;
  return p->pVfs->xShmMap(p->pFile, iChunk, sz, ppOut);
}

static void btVfsShmBarrier(bt_file *pFile){
  BtFile *p = (BtFile*)pFile;
  return p->pVfs->xShmBarrier(p->pFile);
}

static int btVfsShmUnmap(bt_file *pFile, int bDelete){
  BtFile *p = (BtFile*)pFile;
  if( p->pBt && p->pBt->bCrash ) return SQLITE4_IOERR;
  return p->pVfs->xShmUnmap(p->pFile, bDelete);
}

static int bt_close(TestDb *pTestDb){
  BtDb *p = (BtDb*)pTestDb;
  int rc = sqlite4BtClose(p->pBt);
  free(p->aBuffer);
  if( p->apFile[0] ) p->apFile[0]->pBt = 0;
  if( p->apFile[1] ) p->apFile[1]->pBt = 0;
  bgc_detach(p);
  testFree(p);
  return rc;
}

static int btMinTransaction(BtDb *p, int iMin, int *piLevel){
  int iLevel;
  int rc = SQLITE4_OK;

  iLevel = sqlite4BtTransactionLevel(p->pBt);
  if( iLevel<iMin ){ 
    rc = sqlite4BtBegin(p->pBt, iMin); 
    *piLevel = iLevel;
  }else{
    *piLevel = -1;
  }

  return rc;
}
static int btRestoreTransaction(BtDb *p, int iLevel, int rcin){
  int rc = rcin;
  if( iLevel>=0 ){
    if( rc==SQLITE4_OK ){
      rc = sqlite4BtCommit(p->pBt, iLevel);
    }else{
      sqlite4BtRollback(p->pBt, iLevel);
    }
    assert( iLevel==sqlite4BtTransactionLevel(p->pBt) );
  }
  return rc;
}

static int bt_write(TestDb *pTestDb, void *pK, int nK, void *pV, int nV){
  BtDb *p = (BtDb*)pTestDb;
  int iLevel;
  int rc;

  rc = btMinTransaction(p, 2, &iLevel);
  if( rc==SQLITE4_OK ){
    if( p->bFastInsert ) sqlite4BtControl(p->pBt, BT_CONTROL_FAST_INSERT_OP, 0);
    rc = sqlite4BtReplace(p->pBt, pK, nK, pV, nV);
    rc = btRestoreTransaction(p, iLevel, rc);
  }
  return rc;
}

static int bt_delete(TestDb *pTestDb, void *pK, int nK){
  return bt_write(pTestDb, pK, nK, 0, -1);
}

static int bt_delete_range(
  TestDb *pTestDb, 
  void *pKey1, int nKey1,
  void *pKey2, int nKey2
){
  BtDb *p = (BtDb*)pTestDb;
  bt_cursor *pCsr = 0;
  int rc = SQLITE4_OK;
  int iLevel;

  rc = btMinTransaction(p, 2, &iLevel);
  if( rc==SQLITE4_OK ){
    if( p->bFastInsert ) sqlite4BtControl(p->pBt, BT_CONTROL_FAST_INSERT_OP, 0);
    rc = sqlite4BtCsrOpen(p->pBt, 0, &pCsr);
  }
  while( rc==SQLITE4_OK ){
    const void *pK;
    int n;
    int nCmp;
    int res;

    rc = sqlite4BtCsrSeek(pCsr, pKey1, nKey1, BT_SEEK_GE);
    if( rc==SQLITE4_INEXACT ) rc = SQLITE4_OK;
    if( rc!=SQLITE4_OK ) break;

    rc = sqlite4BtCsrKey(pCsr, &pK, &n);
    if( rc!=SQLITE4_OK ) break;

    nCmp = MIN(n, nKey1);
    res = memcmp(pKey1, pK, nCmp);
    assert( res<0 || (res==0 && nKey1<=n) );
    if( res==0 && nKey1==n ){
      rc = sqlite4BtCsrNext(pCsr);
      if( rc!=SQLITE4_OK ) break;
      rc = sqlite4BtCsrKey(pCsr, &pK, &n);
      if( rc!=SQLITE4_OK ) break;
    }

    nCmp = MIN(n, nKey2);
    res = memcmp(pKey2, pK, nCmp);
    if( res<0 || (res==0 && nKey2<=n) ) break;
    
    rc = sqlite4BtDelete(pCsr);
  }
  if( rc==SQLITE4_NOTFOUND ) rc = SQLITE4_OK;

  sqlite4BtCsrClose(pCsr);

  rc = btRestoreTransaction(p, iLevel, rc);
  return rc;
}

static int bt_fetch(
  TestDb *pTestDb, 
  void *pK, int nK, 
  void **ppVal, int *pnVal
){
  BtDb *p = (BtDb*)pTestDb;
  bt_cursor *pCsr = 0;
  int iLevel;
  int rc = SQLITE4_OK;

  iLevel = sqlite4BtTransactionLevel(p->pBt);
  if( iLevel==0 ){ 
    rc = sqlite4BtBegin(p->pBt, 1); 
    if( rc!=SQLITE4_OK ) return rc;
  }

  if( p->bFastInsert ) sqlite4BtControl(p->pBt, BT_CONTROL_FAST_INSERT_OP, 0);
  rc = sqlite4BtCsrOpen(p->pBt, 0, &pCsr);
  if( rc==SQLITE4_OK ){
    rc = sqlite4BtCsrSeek(pCsr, pK, nK, BT_SEEK_EQ);
    if( rc==SQLITE4_OK ){
      const void *pV = 0;
      int nV = 0;
      rc = sqlite4BtCsrData(pCsr, 0, -1, &pV, &nV);
      if( rc==SQLITE4_OK ){
        if( nV>p->nBuffer ){
          free(p->aBuffer);
          p->aBuffer = (u8*)malloc(nV*2);
          p->nBuffer = nV*2;
        }
        memcpy(p->aBuffer, pV, nV);
        *pnVal = nV;
        *ppVal = (void*)(p->aBuffer);
      }

    }else if( rc==SQLITE4_INEXACT || rc==SQLITE4_NOTFOUND ){
      *ppVal = 0;
      *pnVal = -1;
      rc = SQLITE4_OK;
    }
    sqlite4BtCsrClose(pCsr);
  }

  if( iLevel==0 ) sqlite4BtCommit(p->pBt, 0); 
  return rc;
}

static int bt_scan(
  TestDb *pTestDb,
  void *pCtx,
  int bReverse,
  void *pFirst, int nFirst,
  void *pLast, int nLast,
  void (*xCallback)(void *, void *, int , void *, int)
){
  BtDb *p = (BtDb*)pTestDb;
  bt_cursor *pCsr = 0;
  int rc;
  int iLevel;

  rc = btMinTransaction(p, 1, &iLevel);

  if( rc==SQLITE4_OK ){
    if( p->bFastInsert ) sqlite4BtControl(p->pBt, BT_CONTROL_FAST_INSERT_OP, 0);
    rc = sqlite4BtCsrOpen(p->pBt, 0, &pCsr);
  }
  if( rc==SQLITE4_OK ){
    if( bReverse ){
      if( pLast ){
        rc = sqlite4BtCsrSeek(pCsr, pLast, nLast, BT_SEEK_LE);
      }else{
        rc = sqlite4BtCsrLast(pCsr);
      }
    }else{
      rc = sqlite4BtCsrSeek(pCsr, pFirst, nFirst, BT_SEEK_GE);
    }
    if( rc==SQLITE4_INEXACT ) rc = SQLITE4_OK;

    while( rc==SQLITE4_OK ){
      const void *pK = 0; int nK = 0;
      const void *pV = 0; int nV = 0;

      rc = sqlite4BtCsrKey(pCsr, &pK, &nK);
      if( rc==SQLITE4_OK ){
        rc = sqlite4BtCsrData(pCsr, 0, -1, &pV, &nV);
      }

      if( rc!=SQLITE4_OK ) break;
      if( bReverse ){
        if( pFirst ){
          int res;
          int nCmp = MIN(nK, nFirst);
          res = memcmp(pFirst, pK, nCmp);
          if( res>0 || (res==0 && nK<nFirst) ) break;
        }
      }else{
        if( pLast ){
          int res;
          int nCmp = MIN(nK, nLast);
          res = memcmp(pLast, pK, nCmp);
          if( res<0 || (res==0 && nK>nLast) ) break;
        }
      }

      xCallback(pCtx, (void*)pK, nK, (void*)pV, nV);
      if( bReverse ){
        rc = sqlite4BtCsrPrev(pCsr);
      }else{
        rc = sqlite4BtCsrNext(pCsr);
      }
    }
    if( rc==SQLITE4_NOTFOUND ) rc = SQLITE4_OK;

    sqlite4BtCsrClose(pCsr);
  }

  rc = btRestoreTransaction(p, iLevel, rc);
  return rc;
}

static int bt_begin(TestDb *pTestDb, int iLvl){
  BtDb *p = (BtDb*)pTestDb;
  int rc = sqlite4BtBegin(p->pBt, iLvl);
  return rc;
}

static int bt_commit(TestDb *pTestDb, int iLvl){
  BtDb *p = (BtDb*)pTestDb;
  int rc = sqlite4BtCommit(p->pBt, iLvl);
  return rc;
}

static int bt_rollback(TestDb *pTestDb, int iLvl){
  BtDb *p = (BtDb*)pTestDb;
  int rc = sqlite4BtRollback(p->pBt, iLvl);
  return rc;
}

static int testParseOption(
  const char **pzIn,              /* IN/OUT: pointer to next option */
  const char **pzOpt,             /* OUT: nul-terminated option name */
  const char **pzArg,             /* OUT: nul-terminated option argument */
  char *pSpace                    /* Temporary space for output params */
){
  const char *p = *pzIn;
  const char *pStart;
  int n;

  char *pOut = pSpace;

  while( *p==' ' ) p++;
  pStart = p;
  while( *p && *p!='=' ) p++;
  if( *p==0 ) return 1;

  n = (p - pStart);
  memcpy(pOut, pStart, n);
  *pzOpt = pOut;
  pOut += n;
  *pOut++ = '\0';

  p++;
  pStart = p;
  while( *p && *p!=' ' ) p++;
  n = (p - pStart);

  memcpy(pOut, pStart, n);
  *pzArg = pOut;
  pOut += n;
  *pOut++ = '\0';

  *pzIn = p;
  return 0;
}

static int testParseInt(const char *z, int *piVal){
  int i = 0;
  const char *p = z;

  while( *p>='0' && *p<='9' ){
    i = i*10 + (*p - '0');
    p++;
  }
  if( *p=='K' || *p=='k' ){
    i = i * 1024;
    p++;
  }else if( *p=='M' || *p=='m' ){
    i = i * 1024 * 1024;
    p++;
  }

  if( *p ) return SQLITE4_ERROR;
  *piVal = i;
  return SQLITE4_OK;
}

static int testBtConfigure(BtDb *pDb, const char *zCfg, int *pbMt){
  int rc = SQLITE4_OK;

  if( zCfg ){
    struct CfgParam {
      const char *zParam;
      int eParam;
    } aParam[] = {
      { "safety",         BT_CONTROL_SAFETY },
      { "autockpt",       BT_CONTROL_AUTOCKPT },
      { "multiproc",      BT_CONTROL_MULTIPROC },
      { "blksz",          BT_CONTROL_BLKSZ },
      { "pagesz",         BT_CONTROL_PAGESZ },
      { "mt",             -1 },
      { "fastinsert",     -2 },
      { 0, 0 }
    };
    const char *z = zCfg;
    int n = strlen(z);
    char *aSpace;
    const char *zOpt;
    const char *zArg;

    aSpace = (char*)testMalloc(n+2);
    while( rc==SQLITE4_OK && 0==testParseOption(&z, &zOpt, &zArg, aSpace) ){
      int i;
      int iVal;
      rc = testArgSelect(aParam, "param", zOpt, &i);
      if( rc!=SQLITE4_OK ) break;

      rc = testParseInt(zArg, &iVal);
      if( rc!=SQLITE4_OK ) break;

      switch( aParam[i].eParam ){
        case -1:
          *pbMt = iVal;
          break;
        case -2:
          pDb->bFastInsert = 1;
          break;
        default:
          rc = sqlite4BtControl(pDb->pBt, aParam[i].eParam, (void*)&iVal);
          break;
      }
    }
    testFree(aSpace);
  }

  return rc;
}


int test_bt_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){

  static const DatabaseMethods SqlMethods = {
    bt_close,
    bt_write,
    bt_delete,
    bt_delete_range,
    bt_fetch,
    bt_scan,
    bt_begin,
    bt_commit,
    bt_rollback
  };
  BtDb *p = 0;
  bt_db *pBt = 0;
  int rc;
  sqlite4_env *pEnv = sqlite4_env_default();

  if( bClear && zFilename && zFilename[0] ){
    char *zLog = sqlite3_mprintf("%s-wal", zFilename);
    unlink(zFilename);
    unlink(zLog);
    sqlite3_free(zLog);
  }
  
  rc = sqlite4BtNew(pEnv, 0, &pBt);
  if( rc==SQLITE4_OK ){
    int mt = 0;                   /* True for multi-threaded connection */

    p = (BtDb*)testMalloc(sizeof(BtDb));
    p->base.pMethods = &SqlMethods;
    p->pBt = pBt;
    p->pEnv = pEnv;
    p->nRef = 1;

    p->env.pVfsCtx = (void*)p;
    p->env.xFullpath = btVfsFullpath;
    p->env.xOpen = btVfsOpen;
    p->env.xSize = btVfsSize;
    p->env.xRead = btVfsRead;
    p->env.xWrite = btVfsWrite;
    p->env.xTruncate = btVfsTruncate;
    p->env.xSync = btVfsSync;
    p->env.xSectorSize = btVfsSectorSize;
    p->env.xClose = btVfsClose;
    p->env.xUnlink = btVfsUnlink;
    p->env.xLock = btVfsLock;
    p->env.xTestLock = btVfsTestLock;
    p->env.xShmMap = btVfsShmMap;
    p->env.xShmBarrier = btVfsShmBarrier;
    p->env.xShmUnmap = btVfsShmUnmap;

    sqlite4BtControl(pBt, BT_CONTROL_GETVFS, (void*)&p->pVfs);
    sqlite4BtControl(pBt, BT_CONTROL_SETVFS, (void*)&p->env);

    rc = testBtConfigure(p, zSpec, &mt);
    if( rc==SQLITE4_OK ){
      rc = sqlite4BtOpen(pBt, zFilename);
    }

    if( rc==SQLITE4_OK && mt ){
      int nAuto = 0;
      rc = bgc_attach(p, zSpec);
      sqlite4BtControl(pBt, BT_CONTROL_AUTOCKPT, (void*)&nAuto);
    }
  }

  if( rc!=SQLITE4_OK && p ){
    bt_close(&p->base);
  }

  *ppDb = &p->base;
  return rc;
}

int test_fbt_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  return test_bt_open("fast=1", zFilename, bClear, ppDb);
}

int test_fbts_open(
  const char *zSpec, 
  const char *zFilename, 
  int bClear, 
  TestDb **ppDb
){
  return test_bt_open("fast=1 blksz=32K pagesz=512", zFilename, bClear, ppDb);
}


void tdb_bt_prepare_sync_crash(TestDb *pTestDb, int iSync){
  BtDb *p = (BtDb*)pTestDb;
  assert( pTestDb->pMethods->xClose==bt_close );
  assert( p->bCrash==0 );
  p->nCrashSync = iSync;
}

bt_db *tdb_bt(TestDb *pDb){
  if( pDb->pMethods->xClose==bt_close ){
    return ((BtDb *)pDb)->pBt;
  }
  return 0;
}

/*************************************************************************
** Beginning of code for background checkpointer.
*/

struct bt_ckpter {
  sqlite4_buffer file;            /* File name */
  sqlite4_buffer spec;            /* Options */
  int nLogsize;                   /* Minimum log size to checkpoint */
  int nRef;                       /* Number of clients */

  int bDoWork;                    /* Set by client threads */
  pthread_t ckpter_thread;        /* Checkpointer thread */
  pthread_cond_t ckpter_cond;     /* Condition var the ckpter waits on */
  pthread_mutex_t ckpter_mutex;   /* Mutex used with ckpter_cond */

  bt_ckpter *pNext;               /* Next object in list at gBgc.pCkpter */
};

static struct GlobalBackgroundCheckpointer {
  bt_ckpter *pCkpter;             /* Linked list of checkpointers */
} gBgc;

static void *bgc_main(void *pArg){
  BtDb *pDb = 0;
  int rc;
  int mt;
  bt_ckpter *pCkpter = (bt_ckpter*)pArg;

  rc = test_bt_open("", (char*)pCkpter->file.p, 0, (TestDb**)&pDb);
  assert( rc==SQLITE4_OK );
  rc = testBtConfigure(pDb, (char*)pCkpter->spec.p, &mt);

  while( pCkpter->nRef>0 ){
    bt_db *db = pDb->pBt;
    int nLog = 0;

    sqlite4BtBegin(db, 1);
    sqlite4BtCommit(db, 0);
    sqlite4BtControl(db, BT_CONTROL_LOGSIZE, (void*)&nLog);

    if( nLog>=pCkpter->nLogsize ){
      int rc;
      bt_checkpoint ckpt;
      memset(&ckpt, 0, sizeof(bt_checkpoint));
      ckpt.nFrameBuffer = nLog/2;
      rc = sqlite4BtControl(db, BT_CONTROL_CHECKPOINT, (void*)&ckpt);
      assert( rc==SQLITE4_OK );
      sqlite4BtControl(db, BT_CONTROL_LOGSIZE, (void*)&nLog);
    }

    /* The thread will wake up when it is signaled either because another
    ** thread has created some work for this one or because the connection
    ** is being closed.  */
    pthread_mutex_lock(&pCkpter->ckpter_mutex);
    if( pCkpter->bDoWork==0 ){
      pthread_cond_wait(&pCkpter->ckpter_cond, &pCkpter->ckpter_mutex);
    }
    pCkpter->bDoWork = 0;
    pthread_mutex_unlock(&pCkpter->ckpter_mutex);
  }

  if( pDb ) bt_close((TestDb*)pDb);
  return 0;
}

static void bgc_logsize_cb(void *pCtx, int nLogsize){
  bt_ckpter *p = (bt_ckpter*)pCtx;
  if( nLogsize>=p->nLogsize ){
    pthread_mutex_lock(&p->ckpter_mutex);
    p->bDoWork = 1;
    pthread_cond_signal(&p->ckpter_cond);
    pthread_mutex_unlock(&p->ckpter_mutex);
  }
}

static int bgc_attach(BtDb *pDb, const char *zSpec){
  int rc;
  int n;
  bt_info info;
  bt_ckpter *pCkpter;

  /* Figure out the full path to the database opened by handle pDb. */
  info.eType = BT_INFO_FILENAME;
  info.pgno = 0;
  sqlite4_buffer_init(&info.output, 0);
  rc = sqlite4BtControl(pDb->pBt, BT_CONTROL_INFO, (void*)&info);
  if( rc!=SQLITE4_OK ) return rc;

  sqlite4_mutex_enter(sqlite4_mutex_alloc(pDb->pEnv, SQLITE4_MUTEX_STATIC_KV));

  /* Search for an existing bt_ckpter object. */
  n = info.output.n;
  for(pCkpter=gBgc.pCkpter; pCkpter; pCkpter=pCkpter->pNext){
    if( n==pCkpter->file.n && 0==memcmp(info.output.p, pCkpter->file.p, n) ){
      break;
    }
  }

  /* Failed to find a suitable checkpointer. Create a new one. */
  if( pCkpter==0 ){
    bt_logsizecb cb;

    pCkpter = testMalloc(sizeof(bt_ckpter));
    memcpy(&pCkpter->file, &info.output, sizeof(sqlite4_buffer));
    info.output.p = 0;
    pCkpter->pNext = gBgc.pCkpter;
    pCkpter->nLogsize = 1000;
    gBgc.pCkpter = pCkpter;
    pCkpter->nRef = 1;

    sqlite4_buffer_init(&pCkpter->spec, 0);
    rc = sqlite4_buffer_set(&pCkpter->spec, zSpec, strlen(zSpec)+1);
    assert( rc==SQLITE4_OK );

    /* Kick off the checkpointer thread. */
    if( rc==0 ) rc = pthread_cond_init(&pCkpter->ckpter_cond, 0);
    if( rc==0 ) rc = pthread_mutex_init(&pCkpter->ckpter_mutex, 0);
    if( rc==0 ){
      rc = pthread_create(&pCkpter->ckpter_thread, 0, bgc_main, (void*)pCkpter);
    }
    assert( rc==0 ); /* todo: Fix this */

    /* Set up the logsize callback for the client thread */
    cb.pCtx = (void*)pCkpter;
    cb.xLogsize = bgc_logsize_cb;
    sqlite4BtControl(pDb->pBt, BT_CONTROL_LOGSIZECB, (void*)&cb);
  }else{
    pCkpter->nRef++;
  }

  /* Assuming a checkpointer was encountered or effected, attach the 
  ** connection to it.  */
  if( pCkpter ){
    pDb->pCkpter = pCkpter;
  }

  sqlite4_mutex_leave(sqlite4_mutex_alloc(pDb->pEnv, SQLITE4_MUTEX_STATIC_KV));
  sqlite4_buffer_clear(&info.output);
  return rc;
}

static int bgc_detach(BtDb *pDb){
  int rc = SQLITE4_OK;
  bt_ckpter *pCkpter = pDb->pCkpter;
  if( pCkpter ){
    int bShutdown = 0;            /* True if this is the last reference */

    sqlite4_mutex_enter(sqlite4_mutex_alloc(pDb->pEnv,SQLITE4_MUTEX_STATIC_KV));
    pCkpter->nRef--;
    if( pCkpter->nRef==0 ){
      bt_ckpter **pp;

      *pp = pCkpter->pNext;
      for(pp=&gBgc.pCkpter; *pp!=pCkpter; pp=&((*pp)->pNext));
      bShutdown = 1;
    }
    sqlite4_mutex_leave(sqlite4_mutex_alloc(pDb->pEnv,SQLITE4_MUTEX_STATIC_KV));

    if( bShutdown ){
      void *pDummy;

      /* Signal the checkpointer thread. */
      pthread_mutex_lock(&pCkpter->ckpter_mutex);
      pCkpter->bDoWork = 1;
      pthread_cond_signal(&pCkpter->ckpter_cond);
      pthread_mutex_unlock(&pCkpter->ckpter_mutex);

      /* Join the checkpointer thread. */
      pthread_join(pCkpter->ckpter_thread, &pDummy);
      pthread_cond_destroy(&pCkpter->ckpter_cond);
      pthread_mutex_destroy(&pCkpter->ckpter_mutex);

      sqlite4_buffer_clear(&pCkpter->file);
      sqlite4_buffer_clear(&pCkpter->spec);
      testFree(pCkpter);
    }

    pDb->pCkpter = 0;
  }
  return rc;
}

/*
** End of background checkpointer.
*************************************************************************/


Added ext/lsm1/lsm-test/lsmtest_util.c.































































































































































































































































































































































































































































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#include "lsmtest.h"
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#ifndef _WIN32
# include <sys/time.h>
#endif

/*
** Global variables used within this module.
*/
static struct TestutilGlobal {
  char **argv;
  int argc;
} g = {0, 0};

static struct TestutilRnd {
  unsigned int aRand1[2048];          /* Bits 0..10 */
  unsigned int aRand2[2048];          /* Bits 11..21 */
  unsigned int aRand3[1024];          /* Bits 22..31 */
} r;

/*************************************************************************
** The following block is a copy of the implementation of SQLite function
** sqlite3_randomness. This version has two important differences:
**
**   1. It always uses the same seed. So the sequence of random data output
**      is the same for every run of the program.
**
**   2. It is not threadsafe.
*/
static struct sqlite3PrngType {
  unsigned char i, j;             /* State variables */
  unsigned char s[256];           /* State variables */
} sqlite3Prng = {
    0xAF, 0x28,
  {
    0x71, 0xF5, 0xB4, 0x6E, 0x80, 0xAB, 0x1D, 0xB8, 
    0xFB, 0xB7, 0x49, 0xBF, 0xFF, 0x72, 0x2D, 0x14, 
    0x79, 0x09, 0xE3, 0x78, 0x76, 0xB0, 0x2C, 0x0A, 
    0x8E, 0x23, 0xEE, 0xDF, 0xE0, 0x9A, 0x2F, 0x67, 
    0xE1, 0xBE, 0x0E, 0xA7, 0x08, 0x97, 0xEB, 0x77, 
    0x78, 0xBA, 0x9D, 0xCA, 0x49, 0x4C, 0x60, 0x9A, 
    0xF6, 0xBD, 0xDA, 0x7F, 0xBC, 0x48, 0x58, 0x52, 
    0xE5, 0xCD, 0x83, 0x72, 0x23, 0x52, 0xFF, 0x6D, 
    0xEF, 0x0F, 0x82, 0x29, 0xA0, 0x83, 0x3F, 0x7D, 
    0xA4, 0x88, 0x31, 0xE7, 0x88, 0x92, 0x3B, 0x9B, 
    0x3B, 0x2C, 0xC2, 0x4C, 0x71, 0xA2, 0xB0, 0xEA, 
    0x36, 0xD0, 0x00, 0xF1, 0xD3, 0x39, 0x17, 0x5D, 
    0x2A, 0x7A, 0xE4, 0xAD, 0xE1, 0x64, 0xCE, 0x0F, 
    0x9C, 0xD9, 0xF5, 0xED, 0xB0, 0x22, 0x5E, 0x62, 
    0x97, 0x02, 0xA3, 0x8C, 0x67, 0x80, 0xFC, 0x88, 
    0x14, 0x0B, 0x15, 0x10, 0x0F, 0xC7, 0x40, 0xD4, 
    0xF1, 0xF9, 0x0E, 0x1A, 0xCE, 0xB9, 0x1E, 0xA1, 
    0x72, 0x8E, 0xD7, 0x78, 0x39, 0xCD, 0xF4, 0x5D, 
    0x2A, 0x59, 0x26, 0x34, 0xF2, 0x73, 0x0B, 0xA0, 
    0x02, 0x51, 0x2C, 0x03, 0xA3, 0xA7, 0x43, 0x13, 
    0xE8, 0x98, 0x2B, 0xD2, 0x53, 0xF8, 0xEE, 0x91, 
    0x7D, 0xE7, 0xE3, 0xDA, 0xD5, 0xBB, 0xC0, 0x92, 
    0x9D, 0x98, 0x01, 0x2C, 0xF9, 0xB9, 0xA0, 0xEB, 
    0xCF, 0x32, 0xFA, 0x01, 0x49, 0xA5, 0x1D, 0x9A, 
    0x76, 0x86, 0x3F, 0x40, 0xD4, 0x89, 0x8F, 0x9C, 
    0xE2, 0xE3, 0x11, 0x31, 0x37, 0xB2, 0x49, 0x28, 
    0x35, 0xC0, 0x99, 0xB6, 0xD0, 0xBC, 0x66, 0x35, 
    0xF7, 0x83, 0x5B, 0xD7, 0x37, 0x1A, 0x2B, 0x18, 
    0xA6, 0xFF, 0x8D, 0x7C, 0x81, 0xA8, 0xFC, 0x9E, 
    0xC4, 0xEC, 0x80, 0xD0, 0x98, 0xA7, 0x76, 0xCC, 
    0x9C, 0x2F, 0x7B, 0xFF, 0x8E, 0x0E, 0xBB, 0x90, 
    0xAE, 0x13, 0x06, 0xF5, 0x1C, 0x4E, 0x52, 0xF7
  }
};

/* Generate and return single random byte */
static unsigned char randomByte(void){
  unsigned char t;
  sqlite3Prng.i++;
  t = sqlite3Prng.s[sqlite3Prng.i];
  sqlite3Prng.j += t;
  sqlite3Prng.s[sqlite3Prng.i] = sqlite3Prng.s[sqlite3Prng.j];
  sqlite3Prng.s[sqlite3Prng.j] = t;
  t += sqlite3Prng.s[sqlite3Prng.i];
  return sqlite3Prng.s[t];
}

/*
** Return N random bytes.
*/
static void randomBlob(int nBuf, unsigned char *zBuf){
  int i;
  for(i=0; i<nBuf; i++){
    zBuf[i] = randomByte();
  }
}
/*
** End of code copied from SQLite.
*************************************************************************/


int testPrngInit(void){
  randomBlob(sizeof(r.aRand1), (unsigned char *)r.aRand1);
  randomBlob(sizeof(r.aRand2), (unsigned char *)r.aRand2);
  randomBlob(sizeof(r.aRand3), (unsigned char *)r.aRand3);
  return 0;
}

unsigned int testPrngValue(unsigned int iVal){
  return
    r.aRand1[iVal & 0x000007FF] ^
    r.aRand2[(iVal>>11) & 0x000007FF] ^
    r.aRand3[(iVal>>22) & 0x000003FF]
  ;
}

void testPrngArray(unsigned int iVal, unsigned int *aOut, int nOut){
  int i;
  for(i=0; i<nOut; i++){
    aOut[i] = testPrngValue(iVal+i);
  }
}

void testPrngString(unsigned int iVal, char *aOut, int nOut){
  int i;
  for(i=0; i<(nOut-1); i++){
    aOut[i] = 'a' + (testPrngValue(iVal+i) % 26);
  }
  aOut[i] = '\0';
}

void testErrorInit(int argc, char **argv){
  g.argc = argc;
  g.argv = argv;
}

void testPrintError(const char *zFormat, ...){
  va_list ap;
  va_start(ap, zFormat);
  vfprintf(stderr, zFormat, ap);
  va_end(ap);
}

void testPrintFUsage(const char *zFormat, ...){
  va_list ap;
  va_start(ap, zFormat);
  fprintf(stderr, "Usage: %s %s ", g.argv[0], g.argv[1]);
  vfprintf(stderr, zFormat, ap);
  fprintf(stderr, "\n");
  va_end(ap);
}

void testPrintUsage(const char *zArgs){
  testPrintError("Usage: %s %s %s\n", g.argv[0], g.argv[1], zArgs);
}


static void argError(void *aData, const char *zType, int sz, const char *zArg){
  struct Entry { const char *zName; };
  struct Entry *pEntry;
  const char *zPrev = 0;

  testPrintError("unrecognized %s \"%s\": must be ", zType, zArg);
  for(pEntry=(struct Entry *)aData; 
      pEntry->zName; 
      pEntry=(struct Entry *)&((unsigned char *)pEntry)[sz]
  ){
    if( zPrev ){ testPrintError("%s, ", zPrev); }
    zPrev = pEntry->zName;
  }
  testPrintError("or %s\n", zPrev);
}

int testArgSelectX(
  void *aData, 
  const char *zType, 
  int sz, 
  const char *zArg, 
  int *piOut
){
  struct Entry { const char *zName; };
  struct Entry *pEntry;
  int nArg = strlen(zArg);

  int i = 0;
  int iOut = -1;
  int nOut = 0;

  for(pEntry=(struct Entry *)aData; 
      pEntry->zName; 
      pEntry=(struct Entry *)&((unsigned char *)pEntry)[sz]
  ){
    int nName = strlen(pEntry->zName);
    if( nArg<=nName && memcmp(pEntry->zName, zArg, nArg)==0 ){
      iOut = i;
      if( nName==nArg ){
        nOut = 1;
        break;
      }
      nOut++;
    }
    i++;
  }

  if( nOut!=1 ){
    argError(aData, zType, sz, zArg);
  }else{
    *piOut = iOut;
  }
  return (nOut!=1);
}

struct timeval zero_time;

void testTimeInit(void){
  gettimeofday(&zero_time, 0);
}

int testTimeGet(void){
  struct timeval now;
  gettimeofday(&now, 0);
  return
    (((int)now.tv_sec - (int)zero_time.tv_sec)*1000) +
    (((int)now.tv_usec - (int)zero_time.tv_usec)/1000);
}

Added ext/lsm1/lsm-test/lsmtest_win32.c.





























































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#include "lsmtest.h"

#ifdef _WIN32

#define TICKS_PER_SECOND      (10000000)
#define TICKS_PER_MICROSECOND (10)
#define TICKS_UNIX_EPOCH      (116444736000000000LL)

int win32GetTimeOfDay(
  struct timeval *tp,
  void *tzp
){
  FILETIME fileTime;
  ULARGE_INTEGER largeInteger;
  ULONGLONG ticks;

  unused_parameter(tzp);
  memset(&fileTime, 0, sizeof(FILETIME));
  GetSystemTimeAsFileTime(&fileTime);
  memset(&largeInteger, 0, sizeof(ULARGE_INTEGER));
  largeInteger.LowPart = fileTime.dwLowDateTime;
  largeInteger.HighPart = fileTime.dwHighDateTime;
  ticks = largeInteger.QuadPart - TICKS_UNIX_EPOCH;
  tp->tv_sec = (long)(ticks / TICKS_PER_SECOND);
  ticks -= ((ULONGLONG)tp->tv_sec * TICKS_PER_SECOND);
  tp->tv_usec = (long)(ticks / TICKS_PER_MICROSECOND);
  return 0;
}
#endif

Added ext/lsm1/lsm.h.

























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
** 2011-08-10
**
** 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 defines the LSM API.
*/
#ifndef _LSM_H
#define _LSM_H
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif

/*
** Opaque handle types.
*/
typedef struct lsm_compress lsm_compress;   /* Compression library functions */
typedef struct lsm_compress_factory lsm_compress_factory;
typedef struct lsm_cursor lsm_cursor;       /* Database cursor handle */
typedef struct lsm_db lsm_db;               /* Database connection handle */
typedef struct lsm_env lsm_env;             /* Runtime environment */
typedef struct lsm_file lsm_file;           /* OS file handle */
typedef struct lsm_mutex lsm_mutex;         /* Mutex handle */

/* 64-bit integer type used for file offsets. */
typedef long long int lsm_i64;              /* 64-bit signed integer type */

/* Candidate values for the 3rd argument to lsm_env.xLock() */
#define LSM_LOCK_UNLOCK 0
#define LSM_LOCK_SHARED 1
#define LSM_LOCK_EXCL   2

/* Flags for lsm_env.xOpen() */
#define LSM_OPEN_READONLY 0x0001

/*
** CAPI: Database Runtime Environment
**
** Run-time environment used by LSM
*/
struct lsm_env {
  int nByte;                 /* Size of this structure in bytes */
  int iVersion;              /* Version number of this structure (1) */
  /****** file i/o ***********************************************/
  void *pVfsCtx;
  int (*xFullpath)(lsm_env*, const char *, char *, int *);
  int (*xOpen)(lsm_env*, const char *, int flags, lsm_file **);
  int (*xRead)(lsm_file *, lsm_i64, void *, int);
  int (*xWrite)(lsm_file *, lsm_i64, void *, int);
  int (*xTruncate)(lsm_file *, lsm_i64);
  int (*xSync)(lsm_file *);
  int (*xSectorSize)(lsm_file *);
  int (*xRemap)(lsm_file *, lsm_i64, void **, lsm_i64*);
  int (*xFileid)(lsm_file *, void *pBuf, int *pnBuf);
  int (*xClose)(lsm_file *);
  int (*xUnlink)(lsm_env*, const char *);
  int (*xLock)(lsm_file*, int, int);
  int (*xTestLock)(lsm_file*, int, int, int);
  int (*xShmMap)(lsm_file*, int, int, void **);
  void (*xShmBarrier)(void);
  int (*xShmUnmap)(lsm_file*, int);
  /****** memory allocation ****************************************/
  void *pMemCtx;
  void *(*xMalloc)(lsm_env*, size_t);            /* malloc(3) function */
  void *(*xRealloc)(lsm_env*, void *, size_t);   /* realloc(3) function */
  void (*xFree)(lsm_env*, void *);               /* free(3) function */
  size_t (*xSize)(lsm_env*, void *);             /* xSize function */
  /****** mutexes ****************************************************/
  void *pMutexCtx;
  int (*xMutexStatic)(lsm_env*,int,lsm_mutex**); /* Obtain a static mutex */
  int (*xMutexNew)(lsm_env*, lsm_mutex**);       /* Get a new dynamic mutex */
  void (*xMutexDel)(lsm_mutex *);           /* Delete an allocated mutex */
  void (*xMutexEnter)(lsm_mutex *);         /* Grab a mutex */
  int (*xMutexTry)(lsm_mutex *);            /* Attempt to obtain a mutex */
  void (*xMutexLeave)(lsm_mutex *);         /* Leave a mutex */
  int (*xMutexHeld)(lsm_mutex *);           /* Return true if mutex is held */
  int (*xMutexNotHeld)(lsm_mutex *);        /* Return true if mutex not held */
  /****** other ****************************************************/
  int (*xSleep)(lsm_env*, int microseconds);

  /* New fields may be added in future releases, in which case the
  ** iVersion value will increase. */
};

/* 
** Values that may be passed as the second argument to xMutexStatic. 
*/
#define LSM_MUTEX_GLOBAL 1
#define LSM_MUTEX_HEAP   2

/*
** CAPI: LSM Error Codes
*/
#define LSM_OK         0
#define LSM_ERROR      1
#define LSM_BUSY       5
#define LSM_NOMEM      7
#define LSM_READONLY   8
#define LSM_IOERR     10
#define LSM_CORRUPT   11
#define LSM_FULL      13
#define LSM_CANTOPEN  14
#define LSM_PROTOCOL  15
#define LSM_MISUSE    21

#define LSM_MISMATCH  50


#define LSM_IOERR_NOENT (LSM_IOERR | (1<<8))

/* 
** CAPI: Creating and Destroying Database Connection Handles
**
** Open and close a database connection handle.
*/
int lsm_new(lsm_env*, lsm_db **ppDb);
int lsm_close(lsm_db *pDb);

/* 
** CAPI: Connecting to a Database
*/
int lsm_open(lsm_db *pDb, const char *zFilename);

/*
** CAPI: Obtaining pointers to database environments
**
** Return a pointer to the environment used by the database connection 
** passed as the first argument. Assuming the argument is valid, this 
** function always returns a valid environment pointer - it cannot fail.
*/
lsm_env *lsm_get_env(lsm_db *pDb);

/*
** The lsm_default_env() function returns a pointer to the default LSM
** environment for the current platform.
*/
lsm_env *lsm_default_env(void);


/*
** CAPI: Configuring a database connection.
**
** The lsm_config() function is used to configure a database connection.
*/
int lsm_config(lsm_db *, int, ...);

/*
** The following values may be passed as the second argument to lsm_config().
**
** LSM_CONFIG_AUTOFLUSH:
**   A read/write integer parameter. 
**
**   This value determines the amount of data allowed to accumulate in a
**   live in-memory tree before it is marked as old. After committing a
**   transaction, a connection checks if the size of the live in-memory tree,
**   including data structure overhead, is greater than the value of this
**   option in KB. If it is, and there is not already an old in-memory tree,
**   the live in-memory tree is marked as old.
**
**   The maximum allowable value is 1048576 (1GB). There is no minimum 
**   value. If this parameter is set to zero, then an attempt is made to
**   mark the live in-memory tree as old after each transaction is committed.
**
**   The default value is 1024 (1MB).
**
** LSM_CONFIG_PAGE_SIZE:
**   A read/write integer parameter. This parameter may only be set before
**   lsm_open() has been called.
**
** LSM_CONFIG_BLOCK_SIZE:
**   A read/write integer parameter. 
**
**   This parameter may only be set before lsm_open() has been called. It
**   must be set to a power of two between 64 and 65536, inclusive (block 
**   sizes between 64KB and 64MB).
**
**   If the connection creates a new database, the block size of the new
**   database is set to the value of this option in KB. After lsm_open()
**   has been called, querying this parameter returns the actual block
**   size of the opened database.
**
**   The default value is 1024 (1MB blocks).
**
** LSM_CONFIG_SAFETY:
**   A read/write integer parameter. Valid values are 0, 1 (the default) 
**   and 2. This parameter determines how robust the database is in the
**   face of a system crash (e.g. a power failure or operating system 
**   crash). As follows:
**
**     0 (off):    No robustness. A system crash may corrupt the database.
**
**     1 (normal): Some robustness. A system crash may not corrupt the
**                 database file, but recently committed transactions may
**                 be lost following recovery.
**
**     2 (full):   Full robustness. A system crash may not corrupt the
**                 database file. Following recovery the database file
**                 contains all successfully committed transactions.
**
** LSM_CONFIG_AUTOWORK:
**   A read/write integer parameter.
**
** LSM_CONFIG_AUTOCHECKPOINT:
**   A read/write integer parameter.
**
**   If this option is set to non-zero value N, then a checkpoint is
**   automatically attempted after each N KB of data have been written to 
**   the database file.
**
**   The amount of uncheckpointed data already written to the database file
**   is a global parameter. After performing database work (writing to the
**   database file), the process checks if the total amount of uncheckpointed 
**   data exceeds the value of this paramter. If so, a checkpoint is performed.
**   This means that this option may cause the connection to perform a 
**   checkpoint even if the current connection has itself written very little
**   data into the database file.
**
**   The default value is 2048 (checkpoint every 2MB).
**
** LSM_CONFIG_MMAP:
**   A read/write integer parameter. If this value is set to 0, then the 
**   database file is accessed using ordinary read/write IO functions. Or,
**   if it is set to 1, then the database file is memory mapped and accessed
**   that way. If this parameter is set to any value N greater than 1, then
**   up to the first N KB of the file are memory mapped, and any remainder
**   accessed using read/write IO.
**
**   The default value is 1 on 64-bit platforms and 32768 on 32-bit platforms.
**   
**
** LSM_CONFIG_USE_LOG:
**   A read/write boolean parameter. True (the default) to use the log
**   file normally. False otherwise.
**
** LSM_CONFIG_AUTOMERGE:
**   A read/write integer parameter. The minimum number of segments to
**   merge together at a time. Default value 4.
**
** LSM_CONFIG_MAX_FREELIST:
**   A read/write integer parameter. The maximum number of free-list 
**   entries that are stored in a database checkpoint (the others are
**   stored elsewhere in the database).
**
**   There is no reason for an application to configure or query this
**   parameter. It is only present because configuring a small value
**   makes certain parts of the lsm code easier to test.
**
** LSM_CONFIG_MULTIPLE_PROCESSES:
**   A read/write boolean parameter. This parameter may only be set before
**   lsm_open() has been called. If true, the library uses shared-memory
**   and posix advisory locks to co-ordinate access by clients from within
**   multiple processes. Otherwise, if false, all database clients must be 
**   located in the same process. The default value is true.
**
** LSM_CONFIG_SET_COMPRESSION:
**   Set the compression methods used to compress and decompress database
**   content. The argument to this option should be a pointer to a structure
**   of type lsm_compress. The lsm_config() method takes a copy of the 
**   structures contents.
**
**   This option may only be used before lsm_open() is called. Invoking it
**   after lsm_open() has been called results in an LSM_MISUSE error.
**
** LSM_CONFIG_GET_COMPRESSION:
**   Query the compression methods used to compress and decompress database
**   content.
**
** LSM_CONFIG_SET_COMPRESSION_FACTORY:
**   Configure a factory method to be invoked in case of an LSM_MISMATCH
**   error.
**
** LSM_CONFIG_READONLY:
**   A read/write boolean parameter. This parameter may only be set before
**   lsm_open() is called.
*/
#define LSM_CONFIG_AUTOFLUSH                1
#define LSM_CONFIG_PAGE_SIZE                2
#define LSM_CONFIG_SAFETY                   3
#define LSM_CONFIG_BLOCK_SIZE               4
#define LSM_CONFIG_AUTOWORK                 5
#define LSM_CONFIG_MMAP                     7
#define LSM_CONFIG_USE_LOG                  8
#define LSM_CONFIG_AUTOMERGE                9
#define LSM_CONFIG_MAX_FREELIST            10
#define LSM_CONFIG_MULTIPLE_PROCESSES      11
#define LSM_CONFIG_AUTOCHECKPOINT          12
#define LSM_CONFIG_SET_COMPRESSION         13
#define LSM_CONFIG_GET_COMPRESSION         14
#define LSM_CONFIG_SET_COMPRESSION_FACTORY 15
#define LSM_CONFIG_READONLY                16

#define LSM_SAFETY_OFF    0
#define LSM_SAFETY_NORMAL 1
#define LSM_SAFETY_FULL   2

/*
** CAPI: Compression and/or Encryption Hooks
*/
struct lsm_compress {
  void *pCtx;
  unsigned int iId;
  int (*xBound)(void *, int nSrc);
  int (*xCompress)(void *, char *, int *, const char *, int);
  int (*xUncompress)(void *, char *, int *, const char *, int);
  void (*xFree)(void *pCtx);
};

struct lsm_compress_factory {
  void *pCtx;
  int (*xFactory)(void *, lsm_db *, unsigned int);
  void (*xFree)(void *pCtx);
};

#define LSM_COMPRESSION_EMPTY 0
#define LSM_COMPRESSION_NONE  1

/*
** CAPI: Allocating and Freeing Memory
**
** Invoke the memory allocation functions that belong to environment
** pEnv. Or the system defaults if no memory allocation functions have 
** been registered.
*/
void *lsm_malloc(lsm_env*, size_t);
void *lsm_realloc(lsm_env*, void *, size_t);
void lsm_free(lsm_env*, void *);

/*
** CAPI: Querying a Connection For Operational Data
**
** Query a database connection for operational statistics or data.
*/
int lsm_info(lsm_db *, int, ...);

int lsm_get_user_version(lsm_db *, unsigned int *);
int lsm_set_user_version(lsm_db *, unsigned int);

/*
** The following values may be passed as the second argument to lsm_info().
**
** LSM_INFO_NWRITE:
**   The third parameter should be of type (int *). The location pointed
**   to by the third parameter is set to the number of 4KB pages written to
**   the database file during the lifetime of this connection. 
**
** LSM_INFO_NREAD:
**   The third parameter should be of type (int *). The location pointed
**   to by the third parameter is set to the number of 4KB pages read from
**   the database file during the lifetime of this connection.
**
** LSM_INFO_DB_STRUCTURE:
**   The third argument should be of type (char **). The location pointed
**   to is populated with a pointer to a nul-terminated string containing
**   the string representation of a Tcl data-structure reflecting the 
**   current structure of the database file. Specifically, the current state
**   of the worker snapshot. The returned string should be eventually freed 
**   by the caller using lsm_free().
**
**   The returned list contains one element for each level in the database,
**   in order from most to least recent. Each element contains a 
**   single element for each segment comprising the corresponding level,
**   starting with the lhs segment, then each of the rhs segments (if any)
**   in order from most to least recent.
**
**   Each segment element is itself a list of 4 integer values, as follows:
**
**   <ol><li> First page of segment
**       <li> Last page of segment
**       <li> Root page of segment (if applicable)
**       <li> Total number of pages in segment
**   </ol>
**
** LSM_INFO_ARRAY_STRUCTURE:
**   There should be two arguments passed following this option (i.e. a 
**   total of four arguments passed to lsm_info()). The first argument 
**   should be the page number of the first page in a database array 
**   (perhaps obtained from an earlier INFO_DB_STRUCTURE call). The second 
**   trailing argument should be of type (char **). The location pointed 
**   to is populated with a pointer to a nul-terminated string that must 
**   be eventually freed using lsm_free() by the caller.
**
**   The output string contains the text representation of a Tcl list of
**   integers. Each pair of integers represent a range of pages used by
**   the identified array. For example, if the array occupies database
**   pages 993 to 1024, then pages 2048 to 2777, then the returned string
**   will be "993 1024 2048 2777".
**
**   If the specified integer argument does not correspond to the first
**   page of any database array, LSM_ERROR is returned and the output
**   pointer is set to a NULL value.
**
** LSM_INFO_LOG_STRUCTURE:
**   The third argument should be of type (char **). The location pointed
**   to is populated with a pointer to a nul-terminated string containing
**   the string representation of a Tcl data-structure. The returned 
**   string should be eventually freed by the caller using lsm_free().
**
**   The Tcl structure returned is a list of six integers that describe
**   the current structure of the log file.
**
** LSM_INFO_ARRAY_PAGES:
**
** LSM_INFO_PAGE_ASCII_DUMP:
**   As with LSM_INFO_ARRAY_STRUCTURE, there should be two arguments passed
**   with calls that specify this option - an integer page number and a
**   (char **) used to return a nul-terminated string that must be later
**   freed using lsm_free(). In this case the output string is populated
**   with a human-readable description of the page content.
**
**   If the page cannot be decoded, it is not an error. In this case the
**   human-readable output message will report the systems failure to 
**   interpret the page data.
**
** LSM_INFO_PAGE_HEX_DUMP:
**   This argument is similar to PAGE_ASCII_DUMP, except that keys and
**   values are represented using hexadecimal notation instead of ascii.
**
** LSM_INFO_FREELIST:
**   The third argument should be of type (char **). The location pointed
**   to is populated with a pointer to a nul-terminated string containing
**   the string representation of a Tcl data-structure. The returned 
**   string should be eventually freed by the caller using lsm_free().
**
**   The Tcl structure returned is a list containing one element for each
**   free block in the database. The element itself consists of two 
**   integers - the block number and the id of the snapshot that freed it.
**
** LSM_INFO_CHECKPOINT_SIZE:
**   The third argument should be of type (int *). The location pointed to
**   by this argument is populated with the number of KB written to the
**   database file since the most recent checkpoint.
**
** LSM_INFO_TREE_SIZE:
**   If this value is passed as the second argument to an lsm_info() call, it
**   should be followed by two arguments of type (int *) (for a total of four
**   arguments).
**
**   At any time, there are either one or two tree structures held in shared
**   memory that new database clients will access (there may also be additional
**   tree structures being used by older clients - this API does not provide
**   information on them). One tree structure - the current tree - is used to
**   accumulate new data written to the database. The other tree structure -
**   the old tree - is a read-only tree holding older data and may be flushed 
**   to disk at any time.
** 
**   Assuming no error occurs, the location pointed to by the first of the two
**   (int *) arguments is set to the size of the old in-memory tree in KB.
**   The second is set to the size of the current, or live in-memory tree.
**
** LSM_INFO_COMPRESSION_ID:
**   This value should be followed by a single argument of type 
**   (unsigned int *). If successful, the location pointed to is populated 
**   with the database compression id before returning.
*/
#define LSM_INFO_NWRITE           1
#define LSM_INFO_NREAD            2
#define LSM_INFO_DB_STRUCTURE     3
#define LSM_INFO_LOG_STRUCTURE    4
#define LSM_INFO_ARRAY_STRUCTURE  5
#define LSM_INFO_PAGE_ASCII_DUMP  6
#define LSM_INFO_PAGE_HEX_DUMP    7
#define LSM_INFO_FREELIST         8
#define LSM_INFO_ARRAY_PAGES      9
#define LSM_INFO_CHECKPOINT_SIZE 10
#define LSM_INFO_TREE_SIZE       11
#define LSM_INFO_FREELIST_SIZE   12
#define LSM_INFO_COMPRESSION_ID  13


/* 
** CAPI: Opening and Closing Write Transactions
**
** These functions are used to open and close transactions and nested 
** sub-transactions.
**
** The lsm_begin() function is used to open transactions and sub-transactions. 
** A successful call to lsm_begin() ensures that there are at least iLevel 
** nested transactions open. To open a top-level transaction, pass iLevel=1. 
** To open a sub-transaction within the top-level transaction, iLevel=2. 
** Passing iLevel=0 is a no-op.
**
** lsm_commit() is used to commit transactions and sub-transactions. A
** successful call to lsm_commit() ensures that there are at most iLevel 
** nested transactions open. To commit a top-level transaction, pass iLevel=0. 
** To commit all sub-transactions inside the main transaction, pass iLevel=1.
**
** Function lsm_rollback() is used to roll back transactions and
** sub-transactions. A successful call to lsm_rollback() restores the database 
** to the state it was in when the iLevel'th nested sub-transaction (if any) 
** was first opened. And then closes transactions to ensure that there are 
** at most iLevel nested transactions open. Passing iLevel=0 rolls back and 
** closes the top-level transaction. iLevel=1 also rolls back the top-level 
** transaction, but leaves it open. iLevel=2 rolls back the sub-transaction 
** nested directly inside the top-level transaction (and leaves it open).
*/
int lsm_begin(lsm_db *pDb, int iLevel);
int lsm_commit(lsm_db *pDb, int iLevel);
int lsm_rollback(lsm_db *pDb, int iLevel);

/* 
** CAPI: Writing to a Database
**
** Write a new value into the database. If a value with a duplicate key 
** already exists it is replaced.
*/
int lsm_insert(lsm_db*, const void *pKey, int nKey, const void *pVal, int nVal);

/*
** Delete a value from the database. No error is returned if the specified
** key value does not exist in the database.
*/
int lsm_delete(lsm_db *, const void *pKey, int nKey);

/*
** Delete all database entries with keys that are greater than (pKey1/nKey1) 
** and smaller than (pKey2/nKey2). Note that keys (pKey1/nKey1) and
** (pKey2/nKey2) themselves, if they exist in the database, are not deleted.
**
** Return LSM_OK if successful, or an LSM error code otherwise.
*/
int lsm_delete_range(lsm_db *, 
    const void *pKey1, int nKey1, const void *pKey2, int nKey2
);

/*
** CAPI: Explicit Database Work and Checkpointing
**
** This function is called by a thread to work on the database structure.
*/
int lsm_work(lsm_db *pDb, int nMerge, int nKB, int *pnWrite);

int lsm_flush(lsm_db *pDb);

/*
** Attempt to checkpoint the current database snapshot. Return an LSM
** error code if an error occurs or LSM_OK otherwise.
**
** If the current snapshot has already been checkpointed, calling this 
** function is a no-op. In this case if pnKB is not NULL, *pnKB is
** set to 0. Or, if the current snapshot is successfully checkpointed
** by this function and pbKB is not NULL, *pnKB is set to the number
** of bytes written to the database file since the previous checkpoint
** (the same measure as returned by the LSM_INFO_CHECKPOINT_SIZE query).
*/
int lsm_checkpoint(lsm_db *pDb, int *pnKB);

/*
** CAPI: Opening and Closing Database Cursors
**
** Open and close a database cursor.
*/
int lsm_csr_open(lsm_db *pDb, lsm_cursor **ppCsr);
int lsm_csr_close(lsm_cursor *pCsr);

/* 
** CAPI: Positioning Database Cursors
**
** If the fourth parameter is LSM_SEEK_EQ, LSM_SEEK_GE or LSM_SEEK_LE,
** this function searches the database for an entry with key (pKey/nKey). 
** If an error occurs, an LSM error code is returned. Otherwise, LSM_OK.
**
** If no error occurs and the requested key is present in the database, the
** cursor is left pointing to the entry with the specified key. Or, if the 
** specified key is not present in the database the state of the cursor 
** depends on the value passed as the final parameter, as follows:
**
** LSM_SEEK_EQ:
**   The cursor is left at EOF (invalidated). A call to lsm_csr_valid()
**   returns non-zero.
**
** LSM_SEEK_LE:
**   The cursor is left pointing to the largest key in the database that
**   is smaller than (pKey/nKey). If the database contains no keys smaller
**   than (pKey/nKey), the cursor is left at EOF.
**
** LSM_SEEK_GE:
**   The cursor is left pointing to the smallest key in the database that
**   is larger than (pKey/nKey). If the database contains no keys larger
**   than (pKey/nKey), the cursor is left at EOF.
**
** If the fourth parameter is LSM_SEEK_LEFAST, this function searches the
** database in a similar manner to LSM_SEEK_LE, with two differences:
**
** <ol><li>Even if a key can be found (the cursor is not left at EOF), the
** lsm_csr_value() function may not be used (attempts to do so return
** LSM_MISUSE).
**
** <li>The key that the cursor is left pointing to may be one that has 
** been recently deleted from the database. In this case it is
** guaranteed that the returned key is larger than any key currently 
** in the database that is less than or equal to (pKey/nKey).
** </ol>
**
** LSM_SEEK_LEFAST requests are intended to be used to allocate database
** keys.
*/
int lsm_csr_seek(lsm_cursor *pCsr, const void *pKey, int nKey, int eSeek);

int lsm_csr_first(lsm_cursor *pCsr);
int lsm_csr_last(lsm_cursor *pCsr);

/*
** Advance the specified cursor to the next or previous key in the database.
** Return LSM_OK if successful, or an LSM error code otherwise.
**
** Functions lsm_csr_seek(), lsm_csr_first() and lsm_csr_last() are "seek"
** functions. Whether or not lsm_csr_next and lsm_csr_prev may be called
** successfully also depends on the most recent seek function called on
** the cursor. Specifically:
**
** <ul>
** <li> At least one seek function must have been called on the cursor.
** <li> To call lsm_csr_next(), the most recent call to a seek function must
** have been either lsm_csr_first() or a call to lsm_csr_seek() specifying
** LSM_SEEK_GE.
** <li> To call lsm_csr_prev(), the most recent call to a seek function must
** have been either lsm_csr_last() or a call to lsm_csr_seek() specifying
** LSM_SEEK_LE.
** </ul>
**
** Otherwise, if the above conditions are not met when lsm_csr_next or 
** lsm_csr_prev is called, LSM_MISUSE is returned and the cursor position
** remains unchanged.
*/
int lsm_csr_next(lsm_cursor *pCsr);
int lsm_csr_prev(lsm_cursor *pCsr);

/*
** Values that may be passed as the fourth argument to lsm_csr_seek().
*/
#define LSM_SEEK_LEFAST   -2
#define LSM_SEEK_LE       -1
#define LSM_SEEK_EQ        0
#define LSM_SEEK_GE        1

/* 
** CAPI: Extracting Data From Database Cursors
**
** Retrieve data from a database cursor.
*/
int lsm_csr_valid(lsm_cursor *pCsr);
int lsm_csr_key(lsm_cursor *pCsr, const void **ppKey, int *pnKey);
int lsm_csr_value(lsm_cursor *pCsr, const void **ppVal, int *pnVal);

/*
** If no error occurs, this function compares the database key passed via
** the pKey/nKey arguments with the key that the cursor passed as the first
** argument currently points to. If the cursors key is less than, equal to
** or greater than pKey/nKey, *piRes is set to less than, equal to or greater
** than zero before returning. LSM_OK is returned in this case.
**
** Or, if an error occurs, an LSM error code is returned and the final 
** value of *piRes is undefined. If the cursor does not point to a valid
** key when this function is called, LSM_MISUSE is returned.
*/
int lsm_csr_cmp(lsm_cursor *pCsr, const void *pKey, int nKey, int *piRes);

/*
** CAPI: Change these!!
**
** Configure a callback to which debugging and other messages should 
** be directed. Only useful for debugging lsm.
*/
void lsm_config_log(lsm_db *, void (*)(void *, int, const char *), void *);

/*
** Configure a callback that is invoked if the database connection ever
** writes to the database file.
*/
void lsm_config_work_hook(lsm_db *, void (*)(lsm_db *, void *), void *);

/* ENDOFAPI */
#ifdef __cplusplus
}  /* End of the 'extern "C"' block */
#endif
#endif /* ifndef _LSM_H */

Added ext/lsm1/lsmInt.h.































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
** 2011-08-18
**
** 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.
**
*************************************************************************
** Internal structure definitions for the LSM module.
*/
#ifndef _LSM_INT_H
#define _LSM_INT_H

#include "lsm.h"
#include <assert.h>
#include <string.h>

#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

#ifdef _WIN32
# ifdef _MSC_VER
#  define snprintf _snprintf
# endif
#else
# include <unistd.h>
#endif

#ifdef NDEBUG
# ifdef LSM_DEBUG_EXPENSIVE
#  undef LSM_DEBUG_EXPENSIVE
# endif
# ifdef LSM_DEBUG
#  undef LSM_DEBUG
# endif
#else
# ifndef LSM_DEBUG
#  define LSM_DEBUG
# endif
#endif

/*
** Default values for various data structure parameters. These may be
** overridden by calls to lsm_config().
*/
#define LSM_DFLT_PAGE_SIZE          (4 * 1024)
#define LSM_DFLT_BLOCK_SIZE         (1 * 1024 * 1024)
#define LSM_DFLT_AUTOFLUSH          (1 * 1024 * 1024)
#define LSM_DFLT_AUTOCHECKPOINT     (i64)(2 * 1024 * 1024)
#define LSM_DFLT_AUTOWORK           1
#define LSM_DFLT_LOG_SIZE           (128*1024)
#define LSM_DFLT_AUTOMERGE          4
#define LSM_DFLT_SAFETY             LSM_SAFETY_NORMAL
#define LSM_DFLT_MMAP               (LSM_IS_64_BIT ? 1 : 32768)
#define LSM_DFLT_MULTIPLE_PROCESSES 1
#define LSM_DFLT_USE_LOG            1

/* Initial values for log file checksums. These are only used if the 
** database file does not contain a valid checkpoint.  */
#define LSM_CKSUM0_INIT 42
#define LSM_CKSUM1_INIT 42

/* "mmap" mode is currently only used in environments with 64-bit address 
** spaces. The following macro is used to test for this.  */
#define LSM_IS_64_BIT (sizeof(void*)==8)

#define LSM_AUTOWORK_QUANT 32

typedef struct Database Database;
typedef struct DbLog DbLog;
typedef struct FileSystem FileSystem;
typedef struct Freelist Freelist;
typedef struct FreelistEntry FreelistEntry;
typedef struct Level Level;
typedef struct LogMark LogMark;
typedef struct LogRegion LogRegion;
typedef struct LogWriter LogWriter;
typedef struct LsmString LsmString;
typedef struct Mempool Mempool;
typedef struct Merge Merge;
typedef struct MergeInput MergeInput;
typedef struct MetaPage MetaPage;
typedef struct MultiCursor MultiCursor;
typedef struct Page Page;
typedef struct Redirect Redirect;
typedef struct Segment Segment;
typedef struct SegmentMerger SegmentMerger;
typedef struct ShmChunk ShmChunk;
typedef struct ShmHeader ShmHeader;
typedef struct ShmReader ShmReader;
typedef struct Snapshot Snapshot;
typedef struct TransMark TransMark;
typedef struct Tree Tree;
typedef struct TreeCursor TreeCursor;
typedef struct TreeHeader TreeHeader;
typedef struct TreeMark TreeMark;
typedef struct TreeRoot TreeRoot;

#ifndef _SQLITEINT_H_
typedef unsigned char u8;
typedef unsigned short int u16;
typedef unsigned int u32;
typedef lsm_i64 i64;
typedef unsigned long long int u64;
#endif

/* A page number is a 64-bit integer. */
typedef i64 Pgno;

#ifdef LSM_DEBUG
int lsmErrorBkpt(int);
#else
# define lsmErrorBkpt(x) (x)
#endif

#define LSM_PROTOCOL_BKPT lsmErrorBkpt(LSM_PROTOCOL)
#define LSM_IOERR_BKPT    lsmErrorBkpt(LSM_IOERR)
#define LSM_NOMEM_BKPT    lsmErrorBkpt(LSM_NOMEM)
#define LSM_CORRUPT_BKPT  lsmErrorBkpt(LSM_CORRUPT)
#define LSM_MISUSE_BKPT   lsmErrorBkpt(LSM_MISUSE)

#define unused_parameter(x) (void)(x)
#define array_size(x) (sizeof(x)/sizeof(x[0]))


/* The size of each shared-memory chunk */
#define LSM_SHM_CHUNK_SIZE (32*1024)

/* The number of bytes reserved at the start of each shm chunk for MM. */
#define LSM_SHM_CHUNK_HDR  (sizeof(ShmChunk))

/* The number of available read locks. */
#define LSM_LOCK_NREADER   6

/* The number of available read-write client locks. */
#define LSM_LOCK_NRWCLIENT   16

/* Lock definitions. 
*/
#define LSM_LOCK_DMS1         1   /* Serialize connect/disconnect ops */
#define LSM_LOCK_DMS2         2   /* Read-write connections */
#define LSM_LOCK_DMS3         3   /* Read-only connections */
#define LSM_LOCK_WRITER       4
#define LSM_LOCK_WORKER       5
#define LSM_LOCK_CHECKPOINTER 6
#define LSM_LOCK_ROTRANS      7
#define LSM_LOCK_READER(i)    ((i) + LSM_LOCK_ROTRANS + 1)
#define LSM_LOCK_RWCLIENT(i)  ((i) + LSM_LOCK_READER(LSM_LOCK_NREADER))

#define LSM_N_LOCK LSM_LOCK_RWCLIENT(LSM_LOCK_NRWCLIENT)

/*
** Meta-page size and usable size.
*/
#define LSM_META_PAGE_SIZE 4096

#define LSM_META_RW_PAGE_SIZE (LSM_META_PAGE_SIZE - LSM_N_LOCK)

/*
** Hard limit on the number of free-list entries that may be stored in 
** a checkpoint (the remainder are stored as a system record in the LSM).
** See also LSM_CONFIG_MAX_FREELIST.
*/
#define LSM_MAX_FREELIST_ENTRIES 24

#define LSM_MAX_BLOCK_REDIRECTS 16

#define LSM_ATTEMPTS_BEFORE_PROTOCOL 10000


/*
** Each entry stored in the LSM (or in-memory tree structure) has an
** associated mask of the following flags.
*/
#define LSM_START_DELETE 0x01     /* Start of open-ended delete range */
#define LSM_END_DELETE   0x02     /* End of open-ended delete range */
#define LSM_POINT_DELETE 0x04     /* Delete this key */
#define LSM_INSERT       0x08     /* Insert this key and value */
#define LSM_SEPARATOR    0x10     /* True if entry is separator key only */
#define LSM_SYSTEMKEY    0x20     /* True if entry is a system key (FREELIST) */

#define LSM_CONTIGUOUS   0x40     /* Used in lsm_tree.c */

/*
** A string that can grow by appending.
*/
struct LsmString {
  lsm_env *pEnv;              /* Run-time environment */
  int n;                      /* Size of string.  -1 indicates error */
  int nAlloc;                 /* Space allocated for z[] */
  char *z;                    /* The string content */
};

typedef struct LsmFile LsmFile;
struct LsmFile {
  lsm_file *pFile;
  LsmFile *pNext;
};

/*
** An instance of the following type is used to store an ordered list of
** u32 values. 
**
** Note: This is a place-holder implementation. It should be replaced by
** a version that avoids making a single large allocation when the array
** contains a large number of values. For this reason, the internals of 
** this object should only manipulated by the intArrayXXX() functions in 
** lsm_tree.c.
*/
typedef struct IntArray IntArray;
struct IntArray {
  int nAlloc;
  int nArray;
  u32 *aArray;
};

struct Redirect {
  int n;                          /* Number of redirects */
  struct RedirectEntry {
    int iFrom;
    int iTo;
  } *a;
};

/*
** An instance of this structure represents a point in the history of the
** tree structure to roll back to. Refer to comments in lsm_tree.c for 
** details.
*/
struct TreeMark {
  u32 iRoot;                      /* Offset of root node in shm file */
  u32 nHeight;                    /* Current height of tree structure */
  u32 iWrite;                     /* Write offset in shm file */
  u32 nChunk;                     /* Number of chunks in shared-memory file */
  u32 iFirst;                     /* First chunk in linked list */
  u32 iNextShmid;                 /* Next id to allocate */
  int iRollback;                  /* Index in lsm->rollback to revert to */
};

/*
** An instance of this structure represents a point in the database log.
*/
struct LogMark {
  i64 iOff;                       /* Offset into log (see lsm_log.c) */
  int nBuf;                       /* Size of in-memory buffer here */
  u8 aBuf[8];                     /* Bytes of content in aBuf[] */
  u32 cksum0;                     /* Checksum 0 at offset (iOff-nBuf) */
  u32 cksum1;                     /* Checksum 1 at offset (iOff-nBuf) */
};

struct TransMark {
  TreeMark tree;
  LogMark log;
};

/*
** A structure that defines the start and end offsets of a region in the
** log file. The size of the region in bytes is (iEnd - iStart), so if
** iEnd==iStart the region is zero bytes in size.
*/
struct LogRegion {
  i64 iStart;                     /* Start of region in log file */
  i64 iEnd;                       /* End of region in log file */
};

struct DbLog {
  u32 cksum0;                     /* Checksum 0 at offset iOff */
  u32 cksum1;                     /* Checksum 1 at offset iOff */
  i64 iSnapshotId;                /* Log space has been reclaimed to this ss */
  LogRegion aRegion[3];           /* Log file regions (see docs in lsm_log.c) */
};

struct TreeRoot {
  u32 iRoot;
  u32 nHeight;
  u32 nByte;                      /* Total size of this tree in bytes */
  u32 iTransId;
};

/*
** Tree header structure. 
*/
struct TreeHeader {
  u32 iUsedShmid;                 /* Id of first shm chunk used by this tree */
  u32 iNextShmid;                 /* Shm-id of next chunk allocated */
  u32 iFirst;                     /* Chunk number of smallest shm-id */
  u32 nChunk;                     /* Number of chunks in shared-memory file */
  TreeRoot root;                  /* Root and height of current tree */
  u32 iWrite;                     /* Write offset in shm file */
  TreeRoot oldroot;               /* Root and height of the previous tree */
  u32 iOldShmid;                  /* Last shm-id used by previous tree */
  u32 iUsrVersion;                /* get/set_user_version() value */
  i64 iOldLog;                    /* Log offset associated with old tree */
  u32 oldcksum0;
  u32 oldcksum1;
  DbLog log;                      /* Current layout of log file */ 
  u32 aCksum[2];                  /* Checksums 1 and 2. */
};

/*
** Database handle structure.
**
** mLock:
**   A bitmask representing the locks currently held by the connection.
**   An LSM database supports N distinct locks, where N is some number less
**   than or equal to 32. Locks are numbered starting from 1 (see the 
**   definitions for LSM_LOCK_WRITER and co.).
**
**   The least significant 32-bits in mLock represent EXCLUSIVE locks. The
**   most significant are SHARED locks. So, if a connection holds a SHARED
**   lock on lock region iLock, then the following is true:
**
**       (mLock & ((iLock+32-1) << 1))
**
**   Or for an EXCLUSIVE lock:
**
**       (mLock & ((iLock-1) << 1))
** 
** pCsr:
**   Points to the head of a linked list that contains all currently open
**   cursors. Once this list becomes empty, the user has no outstanding
**   cursors and the database handle can be successfully closed.
**
** pCsrCache:
**   This list contains cursor objects that have been closed using
**   lsm_csr_close(). Each time a cursor is closed, it is shifted from 
**   the pCsr list to this list. When a new cursor is opened, this list
**   is inspected to see if there exists a cursor object that can be
**   reused. This is an optimization only.
*/
struct lsm_db {

  /* Database handle configuration */
  lsm_env *pEnv;                            /* runtime environment */
  int (*xCmp)(void *, int, void *, int);    /* Compare function */

  /* Values configured by calls to lsm_config */
  int eSafety;                    /* LSM_SAFETY_OFF, NORMAL or FULL */
  int bAutowork;                  /* Configured by LSM_CONFIG_AUTOWORK */
  int nTreeLimit;                 /* Configured by LSM_CONFIG_AUTOFLUSH */
  int nMerge;                     /* Configured by LSM_CONFIG_AUTOMERGE */
  int bUseLog;                    /* Configured by LSM_CONFIG_USE_LOG */
  int nDfltPgsz;                  /* Configured by LSM_CONFIG_PAGE_SIZE */
  int nDfltBlksz;                 /* Configured by LSM_CONFIG_BLOCK_SIZE */
  int nMaxFreelist;               /* Configured by LSM_CONFIG_MAX_FREELIST */
  int iMmap;                      /* Configured by LSM_CONFIG_MMAP */
  i64 nAutockpt;                  /* Configured by LSM_CONFIG_AUTOCHECKPOINT */
  int bMultiProc;                 /* Configured by L_C_MULTIPLE_PROCESSES */
  int bReadonly;                  /* Configured by LSM_CONFIG_READONLY */
  lsm_compress compress;          /* Compression callbacks */
  lsm_compress_factory factory;   /* Compression callback factory */

  /* Sub-system handles */
  FileSystem *pFS;                /* On-disk portion of database */
  Database *pDatabase;            /* Database shared data */

  int iRwclient;                  /* Read-write client lock held (-1 == none) */

  /* Client transaction context */
  Snapshot *pClient;              /* Client snapshot */
  int iReader;                    /* Read lock held (-1 == unlocked) */
  int bRoTrans;                   /* True if a read-only db trans is open */
  MultiCursor *pCsr;              /* List of all open cursors */
  LogWriter *pLogWriter;          /* Context for writing to the log file */
  int nTransOpen;                 /* Number of opened write transactions */
  int nTransAlloc;                /* Allocated size of aTrans[] array */
  TransMark *aTrans;              /* Array of marks for transaction rollback */
  IntArray rollback;              /* List of tree-nodes to roll back */
  int bDiscardOld;                /* True if lsmTreeDiscardOld() was called */

  MultiCursor *pCsrCache;         /* List of all closed cursors */

  /* Worker context */
  Snapshot *pWorker;              /* Worker snapshot (or NULL) */
  Freelist *pFreelist;            /* See sortedNewToplevel() */
  int bUseFreelist;               /* True to use pFreelist */
  int bIncrMerge;                 /* True if currently doing a merge */

  int bInFactory;                 /* True if within factory.xFactory() */

  /* Debugging message callback */
  void (*xLog)(void *, int, const char *);
  void *pLogCtx;

  /* Work done notification callback */
  void (*xWork)(lsm_db *, void *);
  void *pWorkCtx;

  u64 mLock;                      /* Mask of current locks. See lsmShmLock(). */
  lsm_db *pNext;                  /* Next connection to same database */

  int nShm;                       /* Size of apShm[] array */
  void **apShm;                   /* Shared memory chunks */
  ShmHeader *pShmhdr;             /* Live shared-memory header */
  TreeHeader treehdr;             /* Local copy of tree-header */
  u32 aSnapshot[LSM_META_PAGE_SIZE / sizeof(u32)];
};

struct Segment {
  Pgno iFirst;                     /* First page of this run */
  Pgno iLastPg;                    /* Last page of this run */
  Pgno iRoot;                      /* Root page number (if any) */
  int nSize;                       /* Size of this run in pages */

  Redirect *pRedirect;             /* Block redirects (or NULL) */
};

/*
** iSplitTopic/pSplitKey/nSplitKey:
**   If nRight>0, this buffer contains a copy of the largest key that has
**   already been written to the left-hand-side of the level.
*/
struct Level {
  Segment lhs;                    /* Left-hand (main) segment */
  int nRight;                     /* Size of apRight[] array */
  Segment *aRhs;                  /* Old segments being merged into this */
  int iSplitTopic;                /* Split key topic (if nRight>0) */
  void *pSplitKey;                /* Pointer to split-key (if nRight>0) */
  int nSplitKey;                  /* Number of bytes in split-key */

  u16 iAge;                       /* Number of times data has been written */
  u16 flags;                      /* Mask of LEVEL_XXX bits */
  Merge *pMerge;                  /* Merge operation currently underway */
  Level *pNext;                   /* Next level in tree */
};

/*
** The Level.flags field is set to a combination of the following bits.
**
** LEVEL_FREELIST_ONLY:
**   Set if the level consists entirely of free-list entries. 
**
** LEVEL_INCOMPLETE:
**   This is set while a new toplevel level is being constructed. It is
**   never set for any level other than a new toplevel.
*/
#define LEVEL_FREELIST_ONLY      0x0001
#define LEVEL_INCOMPLETE         0x0002


/*
** A structure describing an ongoing merge. There is an instance of this
** structure for every Level currently undergoing a merge in the worker
** snapshot.
**
** It is assumed that code that uses an instance of this structure has
** access to the associated Level struct.
**
** iOutputOff:
**   The byte offset to write to next within the last page of the 
**   output segment.
*/
struct MergeInput {
  Pgno iPg;                       /* Page on which next input is stored */
  int iCell;                      /* Cell containing next input to merge */
};
struct Merge {
  int nInput;                     /* Number of input runs being merged */
  MergeInput *aInput;             /* Array nInput entries in size */
  MergeInput splitkey;            /* Location in file of current splitkey */
  int nSkip;                      /* Number of separators entries to skip */
  int iOutputOff;                 /* Write offset on output page */
  Pgno iCurrentPtr;               /* Current pointer value */
};

/* 
** The first argument to this macro is a pointer to a Segment structure.
** Returns true if the structure instance indicates that the separators
** array is valid.
*/
#define segmentHasSeparators(pSegment) ((pSegment)->sep.iFirst>0)

/*
** The values that accompany the lock held by a database reader.
*/
struct ShmReader {
  u32 iTreeId;
  i64 iLsmId;
};

/*
** An instance of this structure is stored in the first shared-memory
** page. The shared-memory header.
**
** bWriter:
**   Immediately after opening a write transaction taking the WRITER lock, 
**   each writer client sets this flag. It is cleared right before the 
**   WRITER lock is relinquished. If a subsequent writer finds that this
**   flag is already set when a write transaction is opened, this indicates
**   that a previous writer failed mid-transaction.
**
** iMetaPage:
**   If the database file does not contain a valid, synced, checkpoint, this
**   value is set to 0. Otherwise, it is set to the meta-page number that
**   contains the most recently written checkpoint (either 1 or 2).
**
** hdr1, hdr2:
**   The two copies of the in-memory tree header. Two copies are required
**   in case a writer fails while updating one of them.
*/
struct ShmHeader {
  u32 aSnap1[LSM_META_PAGE_SIZE / 4];
  u32 aSnap2[LSM_META_PAGE_SIZE / 4];
  u32 bWriter;
  u32 iMetaPage;
  TreeHeader hdr1;
  TreeHeader hdr2;
  ShmReader aReader[LSM_LOCK_NREADER];
};

/*
** An instance of this structure is stored at the start of each shared-memory
** chunk except the first (which is the header chunk - see above).
*/
struct ShmChunk {
  u32 iShmid;
  u32 iNext;
};

/*
** Maximum number of shared-memory chunks allowed in the *-shm file. Since
** each shared-memory chunk is 32KB in size, this is a theoretical limit only.
*/
#define LSM_MAX_SHMCHUNKS  (1<<30)

/* Return true if shm-sequence "a" is larger than or equal to "b" */
#define shm_sequence_ge(a, b) (((u32)a-(u32)b) < LSM_MAX_SHMCHUNKS)

#define LSM_APPLIST_SZ 4

/*
** An instance of the following structure stores the in-memory part of
** the current free block list. This structure is to the free block list
** as the in-memory tree is to the users database content. The contents 
** of the free block list is found by merging the in-memory components 
** with those stored in the LSM, just as the contents of the database is
** found by merging the in-memory tree with the user data entries in the
** LSM.
**
** Each FreelistEntry structure in the array represents either an insert
** or delete operation on the free-list. For deletes, the FreelistEntry.iId
** field is set to -1. For inserts, it is set to zero or greater. 
**
** The array of FreelistEntry structures is always sorted in order of
** block number (ascending).
**
** When the in-memory free block list is written into the LSM, each insert
** operation is written separately. The entry key is the bitwise inverse
** of the block number as a 32-bit big-endian integer. This is done so that
** the entries in the LSM are sorted in descending order of block id. 
** The associated value is the snapshot id, formated as a varint.
*/
struct Freelist {
  FreelistEntry *aEntry;          /* Free list entries */
  int nEntry;                     /* Number of valid slots in aEntry[] */
  int nAlloc;                     /* Allocated size of aEntry[] */
};
struct FreelistEntry {
  u32 iBlk;                       /* Block number */
  i64 iId;                        /* Largest snapshot id to use this block */
};

/*
** A snapshot of a database. A snapshot contains all the information required
** to read or write a database file on disk. See the description of struct
** Database below for futher details.
*/
struct Snapshot {
  Database *pDatabase;            /* Database this snapshot belongs to */
  u32 iCmpId;                     /* Id of compression scheme */
  Level *pLevel;                  /* Pointer to level 0 of snapshot (or NULL) */
  i64 iId;                        /* Snapshot id */
  i64 iLogOff;                    /* Log file offset */
  Redirect redirect;              /* Block redirection array */

  /* Used by worker snapshots only */
  int nBlock;                     /* Number of blocks in database file */
  Pgno aiAppend[LSM_APPLIST_SZ];  /* Append point list */
  Freelist freelist;              /* Free block list */
  u32 nWrite;                     /* Total number of pages written to disk */
};
#define LSM_INITIAL_SNAPSHOT_ID 11

/*
** Functions from file "lsm_ckpt.c".
*/
int lsmCheckpointWrite(lsm_db *, int, u32 *);
int lsmCheckpointLevels(lsm_db *, int, void **, int *);
int lsmCheckpointLoadLevels(lsm_db *pDb, void *pVal, int nVal);

int lsmCheckpointRecover(lsm_db *);
int lsmCheckpointDeserialize(lsm_db *, int, u32 *, Snapshot **);

int lsmCheckpointLoadWorker(lsm_db *pDb);
int lsmCheckpointStore(lsm_db *pDb, int);

int lsmCheckpointLoad(lsm_db *pDb, int *);
int lsmCheckpointLoadOk(lsm_db *pDb, int);
int lsmCheckpointClientCacheOk(lsm_db *);

u32 lsmCheckpointNBlock(u32 *);
i64 lsmCheckpointId(u32 *, int);
u32 lsmCheckpointNWrite(u32 *, int);
i64 lsmCheckpointLogOffset(u32 *);
int lsmCheckpointPgsz(u32 *);
int lsmCheckpointBlksz(u32 *);
void lsmCheckpointLogoffset(u32 *aCkpt, DbLog *pLog);
void lsmCheckpointZeroLogoffset(lsm_db *);

int lsmCheckpointSaveWorker(lsm_db *pDb, int);
int lsmDatabaseFull(lsm_db *pDb);
int lsmCheckpointSynced(lsm_db *pDb, i64 *piId, i64 *piLog, u32 *pnWrite);

int lsmCheckpointSize(lsm_db *db, int *pnByte);

int lsmInfoCompressionId(lsm_db *db, u32 *piCmpId);

/* 
** Functions from file "lsm_tree.c".
*/
int lsmTreeNew(lsm_env *, int (*)(void *, int, void *, int), Tree **ppTree);
void lsmTreeRelease(lsm_env *, Tree *);
int lsmTreeInit(lsm_db *);
int lsmTreeRepair(lsm_db *);

void lsmTreeMakeOld(lsm_db *pDb);
void lsmTreeDiscardOld(lsm_db *pDb);
int lsmTreeHasOld(lsm_db *pDb);

int lsmTreeSize(lsm_db *);
int lsmTreeEndTransaction(lsm_db *pDb, int bCommit);
int lsmTreeLoadHeader(lsm_db *pDb, int *);
int lsmTreeLoadHeaderOk(lsm_db *, int);

int lsmTreeInsert(lsm_db *pDb, void *pKey, int nKey, void *pVal, int nVal);
int lsmTreeDelete(lsm_db *db, void *pKey1, int nKey1, void *pKey2, int nKey2);
void lsmTreeRollback(lsm_db *pDb, TreeMark *pMark);
void lsmTreeMark(lsm_db *pDb, TreeMark *pMark);

int lsmTreeCursorNew(lsm_db *pDb, int, TreeCursor **);
void lsmTreeCursorDestroy(TreeCursor *);

int lsmTreeCursorSeek(TreeCursor *pCsr, void *pKey, int nKey, int *pRes);
int lsmTreeCursorNext(TreeCursor *pCsr);
int lsmTreeCursorPrev(TreeCursor *pCsr);
int lsmTreeCursorEnd(TreeCursor *pCsr, int bLast);
void lsmTreeCursorReset(TreeCursor *pCsr);
int lsmTreeCursorKey(TreeCursor *pCsr, int *pFlags, void **ppKey, int *pnKey);
int lsmTreeCursorFlags(TreeCursor *pCsr);
int lsmTreeCursorValue(TreeCursor *pCsr, void **ppVal, int *pnVal);
int lsmTreeCursorValid(TreeCursor *pCsr);
int lsmTreeCursorSave(TreeCursor *pCsr);

void lsmFlagsToString(int flags, char *zFlags);

/* 
** Functions from file "mem.c".
*/
void *lsmMalloc(lsm_env*, size_t);
void lsmFree(lsm_env*, void *);
void *lsmRealloc(lsm_env*, void *, size_t);
void *lsmReallocOrFree(lsm_env*, void *, size_t);
void *lsmReallocOrFreeRc(lsm_env *, void *, size_t, int *);

void *lsmMallocZeroRc(lsm_env*, size_t, int *);
void *lsmMallocRc(lsm_env*, size_t, int *);

void *lsmMallocZero(lsm_env *pEnv, size_t);
char *lsmMallocStrdup(lsm_env *pEnv, const char *);

/* 
** Functions from file "lsm_mutex.c".
*/
int lsmMutexStatic(lsm_env*, int, lsm_mutex **);
int lsmMutexNew(lsm_env*, lsm_mutex **);
void lsmMutexDel(lsm_env*, lsm_mutex *);
void lsmMutexEnter(lsm_env*, lsm_mutex *);
int lsmMutexTry(lsm_env*, lsm_mutex *);
void lsmMutexLeave(lsm_env*, lsm_mutex *);

#ifndef NDEBUG
int lsmMutexHeld(lsm_env *, lsm_mutex *);
int lsmMutexNotHeld(lsm_env *, lsm_mutex *);
#endif

/**************************************************************************
** Start of functions from "lsm_file.c".
*/
int lsmFsOpen(lsm_db *, const char *, int);
int lsmFsOpenLog(lsm_db *, int *);
void lsmFsCloseLog(lsm_db *);
void lsmFsClose(FileSystem *);

int lsmFsConfigure(lsm_db *db);

int lsmFsBlockSize(FileSystem *);
void lsmFsSetBlockSize(FileSystem *, int);
int lsmFsMoveBlock(FileSystem *pFS, Segment *pSeg, int iTo, int iFrom);

int lsmFsPageSize(FileSystem *);
void lsmFsSetPageSize(FileSystem *, int);

int lsmFsFileid(lsm_db *pDb, void **ppId, int *pnId);

/* Creating, populating, gobbling and deleting sorted runs. */
void lsmFsGobble(lsm_db *, Segment *, Pgno *, int);
int lsmFsSortedDelete(FileSystem *, Snapshot *, int, Segment *);
int lsmFsSortedFinish(FileSystem *, Segment *);
int lsmFsSortedAppend(FileSystem *, Snapshot *, Level *, int, Page **);
int lsmFsSortedPadding(FileSystem *, Snapshot *, Segment *);

/* Functions to retrieve the lsm_env pointer from a FileSystem or Page object */
lsm_env *lsmFsEnv(FileSystem *);
lsm_env *lsmPageEnv(Page *);
FileSystem *lsmPageFS(Page *);

int lsmFsSectorSize(FileSystem *);

void lsmSortedSplitkey(lsm_db *, Level *, int *);

/* Reading sorted run content. */
int lsmFsDbPageLast(FileSystem *pFS, Segment *pSeg, Page **ppPg);
int lsmFsDbPageGet(FileSystem *, Segment *, Pgno, Page **);
int lsmFsDbPageNext(Segment *, Page *, int eDir, Page **);

u8 *lsmFsPageData(Page *, int *);
int lsmFsPageRelease(Page *);
int lsmFsPagePersist(Page *);
void lsmFsPageRef(Page *);
Pgno lsmFsPageNumber(Page *);

int lsmFsNRead(FileSystem *);
int lsmFsNWrite(FileSystem *);

int lsmFsMetaPageGet(FileSystem *, int, int, MetaPage **);
int lsmFsMetaPageRelease(MetaPage *);
u8 *lsmFsMetaPageData(MetaPage *, int *);

#ifdef LSM_DEBUG
int lsmFsDbPageIsLast(Segment *pSeg, Page *pPg);
int lsmFsIntegrityCheck(lsm_db *);
#endif

Pgno lsmFsRedirectPage(FileSystem *, Redirect *, Pgno);

int lsmFsPageWritable(Page *);

/* Functions to read, write and sync the log file. */
int lsmFsWriteLog(FileSystem *pFS, i64 iOff, LsmString *pStr);
int lsmFsSyncLog(FileSystem *pFS);
int lsmFsReadLog(FileSystem *pFS, i64 iOff, int nRead, LsmString *pStr);
int lsmFsTruncateLog(FileSystem *pFS, i64 nByte);
int lsmFsTruncateDb(FileSystem *pFS, i64 nByte);
int lsmFsCloseAndDeleteLog(FileSystem *pFS);

LsmFile *lsmFsDeferClose(FileSystem *pFS);

/* And to sync the db file */
int lsmFsSyncDb(FileSystem *, int);

void lsmFsFlushWaiting(FileSystem *, int *);

/* Used by lsm_info(ARRAY_STRUCTURE) and lsm_config(MMAP) */
int lsmInfoArrayStructure(lsm_db *pDb, int bBlock, Pgno iFirst, char **pzOut);
int lsmInfoArrayPages(lsm_db *pDb, Pgno iFirst, char **pzOut);
int lsmConfigMmap(lsm_db *pDb, int *piParam);

int lsmEnvOpen(lsm_env *, const char *, int, lsm_file **);
int lsmEnvClose(lsm_env *pEnv, lsm_file *pFile);
int lsmEnvLock(lsm_env *pEnv, lsm_file *pFile, int iLock, int eLock);
int lsmEnvTestLock(lsm_env *pEnv, lsm_file *pFile, int iLock, int nLock, int);

int lsmEnvShmMap(lsm_env *, lsm_file *, int, int, void **); 
void lsmEnvShmBarrier(lsm_env *);
void lsmEnvShmUnmap(lsm_env *, lsm_file *, int);

void lsmEnvSleep(lsm_env *, int);

int lsmFsReadSyncedId(lsm_db *db, int, i64 *piVal);

int lsmFsSegmentContainsPg(FileSystem *pFS, Segment *, Pgno, int *);

void lsmFsPurgeCache(FileSystem *);

/*
** End of functions from "lsm_file.c".
**************************************************************************/

/* 
** Functions from file "lsm_sorted.c".
*/
int lsmInfoPageDump(lsm_db *, Pgno, int, char **);
void lsmSortedCleanup(lsm_db *);
int lsmSortedAutoWork(lsm_db *, int nUnit);

int lsmSortedWalkFreelist(lsm_db *, int, int (*)(void *, int, i64), void *);

int lsmSaveWorker(lsm_db *, int);

int lsmFlushTreeToDisk(lsm_db *pDb);

void lsmSortedRemap(lsm_db *pDb);

void lsmSortedFreeLevel(lsm_env *pEnv, Level *);

int lsmSortedAdvanceAll(lsm_db *pDb);

int lsmSortedLoadMerge(lsm_db *, Level *, u32 *, int *);
int lsmSortedLoadFreelist(lsm_db *pDb, void **, int *);

void *lsmSortedSplitKey(Level *pLevel, int *pnByte);

void lsmSortedSaveTreeCursors(lsm_db *);

int lsmMCursorNew(lsm_db *, MultiCursor **);
void lsmMCursorClose(MultiCursor *, int);
int lsmMCursorSeek(MultiCursor *, int, void *, int , int);
int lsmMCursorFirst(MultiCursor *);
int lsmMCursorPrev(MultiCursor *);
int lsmMCursorLast(MultiCursor *);
int lsmMCursorValid(MultiCursor *);
int lsmMCursorNext(MultiCursor *);
int lsmMCursorKey(MultiCursor *, void **, int *);
int lsmMCursorValue(MultiCursor *, void **, int *);
int lsmMCursorType(MultiCursor *, int *);
lsm_db *lsmMCursorDb(MultiCursor *);
void lsmMCursorFreeCache(lsm_db *);

int lsmSaveCursors(lsm_db *pDb);
int lsmRestoreCursors(lsm_db *pDb);

void lsmSortedDumpStructure(lsm_db *pDb, Snapshot *, int, int, const char *);
void lsmFsDumpBlocklists(lsm_db *);

void lsmSortedExpandBtreePage(Page *pPg, int nOrig);

void lsmPutU32(u8 *, u32);
u32 lsmGetU32(u8 *);
u64 lsmGetU64(u8 *);

/*
** Functions from "lsm_varint.c".
*/
int lsmVarintPut32(u8 *, int);
int lsmVarintGet32(u8 *, int *);
int lsmVarintPut64(u8 *aData, i64 iVal);
int lsmVarintGet64(const u8 *aData, i64 *piVal);

int lsmVarintLen32(int);
int lsmVarintSize(u8 c);

/* 
** Functions from file "main.c".
*/
void lsmLogMessage(lsm_db *, int, const char *, ...);
int lsmInfoFreelist(lsm_db *pDb, char **pzOut);

/*
** Functions from file "lsm_log.c".
*/
int lsmLogBegin(lsm_db *pDb);
int lsmLogWrite(lsm_db *, int, void *, int, void *, int);
int lsmLogCommit(lsm_db *);
void lsmLogEnd(lsm_db *pDb, int bCommit);
void lsmLogTell(lsm_db *, LogMark *);
void lsmLogSeek(lsm_db *, LogMark *);
void lsmLogClose(lsm_db *);

int lsmLogRecover(lsm_db *);
int lsmInfoLogStructure(lsm_db *pDb, char **pzVal);

/* Valid values for the second argument to lsmLogWrite(). */
#define LSM_WRITE        0x06
#define LSM_DELETE       0x08
#define LSM_DRANGE       0x0A

/**************************************************************************
** Functions from file "lsm_shared.c".
*/

int lsmDbDatabaseConnect(lsm_db*, const char *);
void lsmDbDatabaseRelease(lsm_db *);

int lsmBeginReadTrans(lsm_db *);
int lsmBeginWriteTrans(lsm_db *);
int lsmBeginFlush(lsm_db *);

int lsmDetectRoTrans(lsm_db *db, int *);
int lsmBeginRoTrans(lsm_db *db);

int lsmBeginWork(lsm_db *);
void lsmFinishWork(lsm_db *, int, int *);

int lsmFinishRecovery(lsm_db *);
void lsmFinishReadTrans(lsm_db *);
int lsmFinishWriteTrans(lsm_db *, int);
int lsmFinishFlush(lsm_db *, int);

int lsmSnapshotSetFreelist(lsm_db *, int *, int);

Snapshot *lsmDbSnapshotClient(lsm_db *);
Snapshot *lsmDbSnapshotWorker(lsm_db *);

void lsmSnapshotSetCkptid(Snapshot *, i64);

Level *lsmDbSnapshotLevel(Snapshot *);
void lsmDbSnapshotSetLevel(Snapshot *, Level *);

void lsmDbRecoveryComplete(lsm_db *, int);

int lsmBlockAllocate(lsm_db *, int, int *);
int lsmBlockFree(lsm_db *, int);
int lsmBlockRefree(lsm_db *, int);

void lsmFreelistDeltaBegin(lsm_db *);
void lsmFreelistDeltaEnd(lsm_db *);
int lsmFreelistDelta(lsm_db *pDb);

DbLog *lsmDatabaseLog(lsm_db *pDb);

#ifdef LSM_DEBUG
  int lsmHoldingClientMutex(lsm_db *pDb);
  int lsmShmAssertLock(lsm_db *db, int iLock, int eOp);
  int lsmShmAssertWorker(lsm_db *db);
#endif

void lsmFreeSnapshot(lsm_env *, Snapshot *);


/* Candidate values for the 3rd argument to lsmShmLock() */
#define LSM_LOCK_UNLOCK 0
#define LSM_LOCK_SHARED 1
#define LSM_LOCK_EXCL   2

int lsmShmCacheChunks(lsm_db *db, int nChunk);
int lsmShmLock(lsm_db *db, int iLock, int eOp, int bBlock);
int lsmShmTestLock(lsm_db *db, int iLock, int nLock, int eOp);
void lsmShmBarrier(lsm_db *db);

#ifdef LSM_DEBUG
void lsmShmHasLock(lsm_db *db, int iLock, int eOp);
#else
# define lsmShmHasLock(x,y,z)
#endif

int lsmReadlock(lsm_db *, i64 iLsm, u32 iShmMin, u32 iShmMax);

int lsmLsmInUse(lsm_db *db, i64 iLsmId, int *pbInUse);
int lsmTreeInUse(lsm_db *db, u32 iLsmId, int *pbInUse);
int lsmFreelistAppend(lsm_env *pEnv, Freelist *p, int iBlk, i64 iId);

int lsmDbMultiProc(lsm_db *);
void lsmDbDeferredClose(lsm_db *, lsm_file *, LsmFile *);
LsmFile *lsmDbRecycleFd(lsm_db *);

int lsmWalkFreelist(lsm_db *, int, int (*)(void *, int, i64), void *);

int lsmCheckCompressionId(lsm_db *, u32);


/**************************************************************************
** functions in lsm_str.c
*/
void lsmStringInit(LsmString*, lsm_env *pEnv);
int lsmStringExtend(LsmString*, int);
int lsmStringAppend(LsmString*, const char *, int);
void lsmStringVAppendf(LsmString*, const char *zFormat, va_list, va_list);
void lsmStringAppendf(LsmString*, const char *zFormat, ...);
void lsmStringClear(LsmString*);
char *lsmMallocPrintf(lsm_env*, const char*, ...);
int lsmStringBinAppend(LsmString *pStr, const u8 *a, int n);

int lsmStrlen(const char *zName);



/* 
** Round up a number to the next larger multiple of 8.  This is used
** to force 8-byte alignment on 64-bit architectures.
*/
#define ROUND8(x)     (((x)+7)&~7)

#define LSM_MIN(x,y) ((x)>(y) ? (y) : (x))
#define LSM_MAX(x,y) ((x)>(y) ? (x) : (y))

#endif

Added ext/lsm1/lsm_ckpt.c.















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
** 2011-09-11
**
** 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 to read and write checkpoints.
**
** A checkpoint represents the database layout at a single point in time.
** It includes a log offset. When an existing database is opened, the
** current state is determined by reading the newest checkpoint and updating
** it with all committed transactions from the log that follow the specified
** offset.
*/
#include "lsmInt.h"

/*
** CHECKPOINT BLOB FORMAT:
**
** A checkpoint blob is a series of unsigned 32-bit integers stored in
** big-endian byte order. As follows:
**
**   Checkpoint header (see the CKPT_HDR_XXX #defines):
**
**     1. The checkpoint id MSW.
**     2. The checkpoint id LSW.
**     3. The number of integer values in the entire checkpoint, including 
**        the two checksum values.
**     4. The compression scheme id.
**     5. The total number of blocks in the database.
**     6. The block size.
**     7. The number of levels.
**     8. The nominal database page size.
**     9. The number of pages (in total) written to the database file.
**
**   Log pointer:
**
**     1. The log offset MSW.
**     2. The log offset LSW.
**     3. Log checksum 0.
**     4. Log checksum 1.
**
**     Note that the "log offset" is not the literal byte offset. Instead,
**     it is the byte offset multiplied by 2, with least significant bit
**     toggled each time the log pointer value is changed. This is to make
**     sure that this field changes each time the log pointer is updated,
**     even if the log file itself is disabled. See lsmTreeMakeOld().
**
**     See ckptExportLog() and ckptImportLog().
**
**   Append points:
**
**     8 integers (4 * 64-bit page numbers). See ckptExportAppendlist().
**
**   For each level in the database, a level record. Formatted as follows:
**
**     0. Age of the level (least significant 16-bits). And flags mask (most
**        significant 16-bits).
**     1. The number of right-hand segments (nRight, possibly 0),
**     2. Segment record for left-hand segment (8 integers defined below),
**     3. Segment record for each right-hand segment (8 integers defined below),
**     4. If nRight>0, The number of segments involved in the merge
**     5. if nRight>0, Current nSkip value (see Merge structure defn.),
**     6. For each segment in the merge:
**        5a. Page number of next cell to read during merge (this field
**            is 64-bits - 2 integers)
**        5b. Cell number of next cell to read during merge
**     7. Page containing current split-key (64-bits - 2 integers).
**     8. Cell within page containing current split-key.
**     9. Current pointer value (64-bits - 2 integers).
**
**   The block redirect array:
**
**     1. Number of redirections (maximum LSM_MAX_BLOCK_REDIRECTS).
**     2. For each redirection:
**        a. "from" block number
**        b. "to" block number
**
**   The in-memory freelist entries. Each entry is either an insert or a
**   delete. The in-memory freelist is to the free-block-list as the
**   in-memory tree is to the users database content.
**
**     1. Number of free-list entries stored in checkpoint header.
**     2. Number of free blocks (in total).
**     3. Total number of blocks freed during database lifetime.
**     4. For each entry:
**        2a. Block number of free block.
**        2b. A 64-bit integer (MSW followed by LSW). -1 for a delete entry,
**            or the associated checkpoint id for an insert.
**
**   The checksum:
**
**     1. Checksum value 1.
**     2. Checksum value 2.
**
** In the above, a segment record consists of the following four 64-bit 
** fields (converted to 2 * u32 by storing the MSW followed by LSW):
**
**     1. First page of array,
**     2. Last page of array,
**     3. Root page of array (or 0),
**     4. Size of array in pages.
*/

/*
** LARGE NUMBERS OF LEVEL RECORDS:
**
** A limit on the number of rhs segments that may be present in the database
** file. Defining this limit ensures that all level records fit within
** the 4096 byte limit for checkpoint blobs.
**
** The number of right-hand-side segments in a database is counted as 
** follows:
**
**   * For each level in the database not undergoing a merge, add 1.
**
**   * For each level in the database that is undergoing a merge, add 
**     the number of segments on the rhs of the level.
**
** A level record not undergoing a merge is 10 integers. A level record 
** with nRhs rhs segments and (nRhs+1) input segments (i.e. including the 
** separators from the next level) is (11*nRhs+20) integers. The maximum
** per right-hand-side level is therefore 21 integers. So the maximum
** size of all level records in a checkpoint is 21*40=820 integers.
**
** TODO: Before pointer values were changed from 32 to 64 bits, the above
** used to come to 420 bytes - leaving significant space for a free-list
** prefix. No more. To fix this, reduce the size of the level records in
** a db snapshot, and improve management of the free-list tail in 
** lsm_sorted.c. 
*/
#define LSM_MAX_RHS_SEGMENTS 40

/*
** LARGE NUMBERS OF FREELIST ENTRIES:
**
** There is also a limit (LSM_MAX_FREELIST_ENTRIES - defined in lsmInt.h)
** on the number of free-list entries stored in a checkpoint. Since each 
** free-list entry consists of 3 integers, the maximum free-list size is 
** 3*100=300 integers. Combined with the limit on rhs segments defined
** above, this ensures that a checkpoint always fits within a 4096 byte
** meta page.
**
** If the database contains more than 100 free blocks, the "overflow" flag
** in the checkpoint header is set and the remainder are stored in the
** system FREELIST entry in the LSM (along with user data). The value
** accompanying the FREELIST key in the LSM is, like a checkpoint, an array
** of 32-bit big-endian integers. As follows:
**
**     For each entry:
**       a. Block number of free block.
**       b. MSW of associated checkpoint id.
**       c. LSW of associated checkpoint id.
**
** The number of entries is not required - it is implied by the size of the
** value blob containing the integer array.
**
** Note that the limit defined by LSM_MAX_FREELIST_ENTRIES is a hard limit.
** The actual value used may be configured using LSM_CONFIG_MAX_FREELIST.
*/

/*
** The argument to this macro must be of type u32. On a little-endian
** architecture, it returns the u32 value that results from interpreting
** the 4 bytes as a big-endian value. On a big-endian architecture, it
** returns the value that would be produced by intepreting the 4 bytes
** of the input value as a little-endian integer.
*/
#define BYTESWAP32(x) ( \
   (((x)&0x000000FF)<<24) + (((x)&0x0000FF00)<<8)  \
 + (((x)&0x00FF0000)>>8)  + (((x)&0xFF000000)>>24) \
)

static const int one = 1;
#define LSM_LITTLE_ENDIAN (*(u8 *)(&one))

/* Sizes, in integers, of various parts of the checkpoint. */
#define CKPT_HDR_SIZE         9
#define CKPT_LOGPTR_SIZE      4
#define CKPT_APPENDLIST_SIZE  (LSM_APPLIST_SZ * 2)

/* A #define to describe each integer in the checkpoint header. */
#define CKPT_HDR_ID_MSW   0
#define CKPT_HDR_ID_LSW   1
#define CKPT_HDR_NCKPT    2
#define CKPT_HDR_CMPID    3
#define CKPT_HDR_NBLOCK   4
#define CKPT_HDR_BLKSZ    5
#define CKPT_HDR_NLEVEL   6
#define CKPT_HDR_PGSZ     7
#define CKPT_HDR_NWRITE   8

#define CKPT_HDR_LO_MSW     9
#define CKPT_HDR_LO_LSW    10
#define CKPT_HDR_LO_CKSUM1 11
#define CKPT_HDR_LO_CKSUM2 12

typedef struct CkptBuffer CkptBuffer;

/*
** Dynamic buffer used to accumulate data for a checkpoint.
*/
struct CkptBuffer {
  lsm_env *pEnv;
  int nAlloc;
  u32 *aCkpt;
};

/*
** Calculate the checksum of the checkpoint specified by arguments aCkpt and
** nCkpt. Store the checksum in *piCksum1 and *piCksum2 before returning.
**
** The value of the nCkpt parameter includes the two checksum values at
** the end of the checkpoint. They are not used as inputs to the checksum 
** calculation. The checksum is based on the array of (nCkpt-2) integers
** at aCkpt[].
*/
static void ckptChecksum(u32 *aCkpt, u32 nCkpt, u32 *piCksum1, u32 *piCksum2){
  int i;
  u32 cksum1 = 1;
  u32 cksum2 = 2;

  if( nCkpt % 2 ){
    cksum1 += aCkpt[nCkpt-3] & 0x0000FFFF;
    cksum2 += aCkpt[nCkpt-3] & 0xFFFF0000;
  }

  for(i=0; (i+3)<nCkpt; i+=2){
    cksum1 += cksum2 + aCkpt[i];
    cksum2 += cksum1 + aCkpt[i+1];
  }

  *piCksum1 = cksum1;
  *piCksum2 = cksum2;
}

/*
** Set integer iIdx of the checkpoint accumulating in buffer *p to iVal.
*/
static void ckptSetValue(CkptBuffer *p, int iIdx, u32 iVal, int *pRc){
  if( *pRc ) return;
  if( iIdx>=p->nAlloc ){
    int nNew = LSM_MAX(8, iIdx*2);
    p->aCkpt = (u32 *)lsmReallocOrFree(p->pEnv, p->aCkpt, nNew*sizeof(u32));
    if( !p->aCkpt ){
      *pRc = LSM_NOMEM_BKPT;
      return;
    }
    p->nAlloc = nNew;
  }
  p->aCkpt[iIdx] = iVal;
}

/*
** Argument aInt points to an array nInt elements in size. Switch the 
** endian-ness of each element of the array.
*/
static void ckptChangeEndianness(u32 *aInt, int nInt){
  if( LSM_LITTLE_ENDIAN ){
    int i;
    for(i=0; i<nInt; i++) aInt[i] = BYTESWAP32(aInt[i]);
  }
}

/*
** Object *p contains a checkpoint in native byte-order. The checkpoint is
** nCkpt integers in size, not including any checksum. This function sets
** the two checksum elements of the checkpoint accordingly.
*/
static void ckptAddChecksum(CkptBuffer *p, int nCkpt, int *pRc){
  if( *pRc==LSM_OK ){
    u32 aCksum[2] = {0, 0};
    ckptChecksum(p->aCkpt, nCkpt+2, &aCksum[0], &aCksum[1]);
    ckptSetValue(p, nCkpt, aCksum[0], pRc);
    ckptSetValue(p, nCkpt+1, aCksum[1], pRc);
  }
}

static void ckptAppend64(CkptBuffer *p, int *piOut, i64 iVal, int *pRc){
  int iOut = *piOut;
  ckptSetValue(p, iOut++, (iVal >> 32) & 0xFFFFFFFF, pRc);
  ckptSetValue(p, iOut++, (iVal & 0xFFFFFFFF), pRc);
  *piOut = iOut;
}

static i64 ckptRead64(u32 *a){
  return (((i64)a[0]) << 32) + (i64)a[1];
}

static i64 ckptGobble64(u32 *a, int *piIn){
  int iIn = *piIn;
  *piIn += 2;
  return ckptRead64(&a[iIn]);
}


/*
** Append a 6-value segment record corresponding to pSeg to the checkpoint 
** buffer passed as the third argument.
*/
static void ckptExportSegment(
  Segment *pSeg, 
  CkptBuffer *p, 
  int *piOut, 
  int *pRc
){
  ckptAppend64(p, piOut, pSeg->iFirst, pRc);
  ckptAppend64(p, piOut, pSeg->iLastPg, pRc);
  ckptAppend64(p, piOut, pSeg->iRoot, pRc);
  ckptAppend64(p, piOut, pSeg->nSize, pRc);
}

static void ckptExportLevel(
  Level *pLevel,                  /* Level object to serialize */
  CkptBuffer *p,                  /* Append new level record to this ckpt */
  int *piOut,                     /* IN/OUT: Size of checkpoint so far */
  int *pRc                        /* IN/OUT: Error code */
){
  int iOut = *piOut;
  Merge *pMerge;

  pMerge = pLevel->pMerge;
  ckptSetValue(p, iOut++, (u32)pLevel->iAge + (u32)(pLevel->flags<<16), pRc);
  ckptSetValue(p, iOut++, pLevel->nRight, pRc);
  ckptExportSegment(&pLevel->lhs, p, &iOut, pRc);

  assert( (pLevel->nRight>0)==(pMerge!=0) );
  if( pMerge ){
    int i;
    for(i=0; i<pLevel->nRight; i++){
      ckptExportSegment(&pLevel->aRhs[i], p, &iOut, pRc);
    }
    assert( pMerge->nInput==pLevel->nRight 
         || pMerge->nInput==pLevel->nRight+1 
    );
    ckptSetValue(p, iOut++, pMerge->nInput, pRc);
    ckptSetValue(p, iOut++, pMerge->nSkip, pRc);
    for(i=0; i<pMerge->nInput; i++){
      ckptAppend64(p, &iOut, pMerge->aInput[i].iPg, pRc);
      ckptSetValue(p, iOut++, pMerge->aInput[i].iCell, pRc);
    }
    ckptAppend64(p, &iOut, pMerge->splitkey.iPg, pRc);
    ckptSetValue(p, iOut++, pMerge->splitkey.iCell, pRc);
    ckptAppend64(p, &iOut, pMerge->iCurrentPtr, pRc);
  }

  *piOut = iOut;
}

/*
** Populate the log offset fields of the checkpoint buffer. 4 values.
*/
static void ckptExportLog(
  lsm_db *pDb, 
  int bFlush,
  CkptBuffer *p, 
  int *piOut, 
  int *pRc
){
  int iOut = *piOut;

  assert( iOut==CKPT_HDR_LO_MSW );

  if( bFlush ){
    i64 iOff = pDb->treehdr.iOldLog;
    ckptAppend64(p, &iOut, iOff, pRc);
    ckptSetValue(p, iOut++, pDb->treehdr.oldcksum0, pRc);
    ckptSetValue(p, iOut++, pDb->treehdr.oldcksum1, pRc);
  }else{
    for(; iOut<=CKPT_HDR_LO_CKSUM2; iOut++){
      ckptSetValue(p, iOut, pDb->pShmhdr->aSnap2[iOut], pRc);
    }
  }

  assert( *pRc || iOut==CKPT_HDR_LO_CKSUM2+1 );
  *piOut = iOut;
}

static void ckptExportAppendlist(
  lsm_db *db,                     /* Database connection */
  CkptBuffer *p,                  /* Checkpoint buffer to write to */
  int *piOut,                     /* IN/OUT: Offset within checkpoint buffer */
  int *pRc                        /* IN/OUT: Error code */
){
  int i;
  Pgno *aiAppend = db->pWorker->aiAppend;

  for(i=0; i<LSM_APPLIST_SZ; i++){
    ckptAppend64(p, piOut, aiAppend[i], pRc);
  }
};

static int ckptExportSnapshot( 
  lsm_db *pDb,                    /* Connection handle */
  int bLog,                       /* True to update log-offset fields */
  i64 iId,                        /* Checkpoint id */
  int bCksum,                     /* If true, include checksums */
  void **ppCkpt,                  /* OUT: Buffer containing checkpoint */
  int *pnCkpt                     /* OUT: Size of checkpoint in bytes */
){
  int rc = LSM_OK;                /* Return Code */
  FileSystem *pFS = pDb->pFS;     /* File system object */
  Snapshot *pSnap = pDb->pWorker; /* Worker snapshot */
  int nLevel = 0;                 /* Number of levels in checkpoint */
  int iLevel;                     /* Used to count out nLevel levels */
  int iOut = 0;                   /* Current offset in aCkpt[] */
  Level *pLevel;                  /* Level iterator */
  int i;                          /* Iterator used while serializing freelist */
  CkptBuffer ckpt;

  /* Initialize the output buffer */
  memset(&ckpt, 0, sizeof(CkptBuffer));
  ckpt.pEnv = pDb->pEnv;
  iOut = CKPT_HDR_SIZE;

  /* Write the log offset into the checkpoint. */
  ckptExportLog(pDb, bLog, &ckpt, &iOut, &rc);

  /* Write the append-point list */
  ckptExportAppendlist(pDb, &ckpt, &iOut, &rc);

  /* Figure out how many levels will be written to the checkpoint. */
  for(pLevel=lsmDbSnapshotLevel(pSnap); pLevel; pLevel=pLevel->pNext) nLevel++;

  /* Serialize nLevel levels. */
  iLevel = 0;
  for(pLevel=lsmDbSnapshotLevel(pSnap); iLevel<nLevel; pLevel=pLevel->pNext){
    ckptExportLevel(pLevel, &ckpt, &iOut, &rc);
    iLevel++;
  }

  /* Write the block-redirect list */
  ckptSetValue(&ckpt, iOut++, pSnap->redirect.n, &rc);
  for(i=0; i<pSnap->redirect.n; i++){
    ckptSetValue(&ckpt, iOut++, pSnap->redirect.a[i].iFrom, &rc);
    ckptSetValue(&ckpt, iOut++, pSnap->redirect.a[i].iTo, &rc);
  }

  /* Write the freelist */
  assert( pSnap->freelist.nEntry<=pDb->nMaxFreelist );
  if( rc==LSM_OK ){
    int nFree = pSnap->freelist.nEntry;
    ckptSetValue(&ckpt, iOut++, nFree, &rc);
    for(i=0; i<nFree; i++){
      FreelistEntry *p = &pSnap->freelist.aEntry[i];
      ckptSetValue(&ckpt, iOut++, p->iBlk, &rc);
      ckptSetValue(&ckpt, iOut++, (p->iId >> 32) & 0xFFFFFFFF, &rc);
      ckptSetValue(&ckpt, iOut++, p->iId & 0xFFFFFFFF, &rc);
    }
  }

  /* Write the checkpoint header */
  assert( iId>=0 );
  assert( pSnap->iCmpId==pDb->compress.iId
       || pSnap->iCmpId==LSM_COMPRESSION_EMPTY 
  );
  ckptSetValue(&ckpt, CKPT_HDR_ID_MSW, (u32)(iId>>32), &rc);
  ckptSetValue(&ckpt, CKPT_HDR_ID_LSW, (u32)(iId&0xFFFFFFFF), &rc);
  ckptSetValue(&ckpt, CKPT_HDR_NCKPT, iOut+2, &rc);
  ckptSetValue(&ckpt, CKPT_HDR_CMPID, pDb->compress.iId, &rc);
  ckptSetValue(&ckpt, CKPT_HDR_NBLOCK, pSnap->nBlock, &rc);
  ckptSetValue(&ckpt, CKPT_HDR_BLKSZ, lsmFsBlockSize(pFS), &rc);
  ckptSetValue(&ckpt, CKPT_HDR_NLEVEL, nLevel, &rc);
  ckptSetValue(&ckpt, CKPT_HDR_PGSZ, lsmFsPageSize(pFS), &rc);
  ckptSetValue(&ckpt, CKPT_HDR_NWRITE, pSnap->nWrite, &rc);

  if( bCksum ){
    ckptAddChecksum(&ckpt, iOut, &rc);
  }else{
    ckptSetValue(&ckpt, iOut, 0, &rc);
    ckptSetValue(&ckpt, iOut+1, 0, &rc);
  }
  iOut += 2;
  assert( iOut<=1024 );

#ifdef LSM_LOG_FREELIST
  lsmLogMessage(pDb, rc, 
      "ckptExportSnapshot(): id=%lld freelist: %d", iId, pSnap->freelist.nEntry
  );
  for(i=0; i<pSnap->freelist.nEntry; i++){
  lsmLogMessage(pDb, rc, 
      "ckptExportSnapshot(): iBlk=%d id=%lld", 
      pSnap->freelist.aEntry[i].iBlk,
      pSnap->freelist.aEntry[i].iId
  );
  }
#endif

  *ppCkpt = (void *)ckpt.aCkpt;
  if( pnCkpt ) *pnCkpt = sizeof(u32)*iOut;
  return rc;
}


/*
** Helper function for ckptImport().
*/
static void ckptNewSegment(
  u32 *aIn,
  int *piIn,
  Segment *pSegment               /* Populate this structure */
){
  assert( pSegment->iFirst==0 && pSegment->iLastPg==0 );
  assert( pSegment->nSize==0 && pSegment->iRoot==0 );
  pSegment->iFirst = ckptGobble64(aIn, piIn);
  pSegment->iLastPg = ckptGobble64(aIn, piIn);
  pSegment->iRoot = ckptGobble64(aIn, piIn);
  pSegment->nSize = ckptGobble64(aIn, piIn);
  assert( pSegment->iFirst );
}

static int ckptSetupMerge(lsm_db *pDb, u32 *aInt, int *piIn, Level *pLevel){
  Merge *pMerge;                  /* Allocated Merge object */
  int nInput;                     /* Number of input segments in merge */
  int iIn = *piIn;                /* Next value to read from aInt[] */
  int i;                          /* Iterator variable */
  int nByte;                      /* Number of bytes to allocate */

  /* Allocate the Merge object. If malloc() fails, return LSM_NOMEM. */
  nInput = (int)aInt[iIn++];
  nByte = sizeof(Merge) + sizeof(MergeInput) * nInput;
  pMerge = (Merge *)lsmMallocZero(pDb->pEnv, nByte);
  if( !pMerge ) return LSM_NOMEM_BKPT;
  pLevel->pMerge = pMerge;

  /* Populate the Merge object. */
  pMerge->aInput = (MergeInput *)&pMerge[1];
  pMerge->nInput = nInput;
  pMerge->iOutputOff = -1;
  pMerge->nSkip = (int)aInt[iIn++];
  for(i=0; i<nInput; i++){
    pMerge->aInput[i].iPg = ckptGobble64(aInt, &iIn);
    pMerge->aInput[i].iCell = (int)aInt[iIn++];
  }
  pMerge->splitkey.iPg = ckptGobble64(aInt, &iIn);
  pMerge->splitkey.iCell = (int)aInt[iIn++];
  pMerge->iCurrentPtr = ckptGobble64(aInt, &iIn);

  /* Set *piIn and return LSM_OK. */
  *piIn = iIn;
  return LSM_OK;
}


static int ckptLoadLevels(
  lsm_db *pDb,
  u32 *aIn, 
  int *piIn, 
  int nLevel,
  Level **ppLevel
){
  int i;
  int rc = LSM_OK;
  Level *pRet = 0;
  Level **ppNext;
  int iIn = *piIn;

  ppNext = &pRet;
  for(i=0; rc==LSM_OK && i<nLevel; i++){
    int iRight;
    Level *pLevel;

    /* Allocate space for the Level structure and Level.apRight[] array */
    pLevel = (Level *)lsmMallocZeroRc(pDb->pEnv, sizeof(Level), &rc);
    if( rc==LSM_OK ){
      pLevel->iAge = (u16)(aIn[iIn] & 0x0000FFFF);
      pLevel->flags = (u16)((aIn[iIn]>>16) & 0x0000FFFF);
      iIn++;
      pLevel->nRight = aIn[iIn++];
      if( pLevel->nRight ){
        int nByte = sizeof(Segment) * pLevel->nRight;
        pLevel->aRhs = (Segment *)lsmMallocZeroRc(pDb->pEnv, nByte, &rc);
      }
      if( rc==LSM_OK ){
        *ppNext = pLevel;
        ppNext = &pLevel->pNext;

        /* Allocate the main segment */
        ckptNewSegment(aIn, &iIn, &pLevel->lhs);

        /* Allocate each of the right-hand segments, if any */
        for(iRight=0; iRight<pLevel->nRight; iRight++){
          ckptNewSegment(aIn, &iIn, &pLevel->aRhs[iRight]);
        }

        /* Set up the Merge object, if required */
        if( pLevel->nRight>0 ){
          rc = ckptSetupMerge(pDb, aIn, &iIn, pLevel);
        }
      }
    }
  }

  if( rc!=LSM_OK ){
    /* An OOM must have occurred. Free any level structures allocated and
    ** return the error to the caller. */
    lsmSortedFreeLevel(pDb->pEnv, pRet);
    pRet = 0;
  }

  *ppLevel = pRet;
  *piIn = iIn;
  return rc;
}


int lsmCheckpointLoadLevels(lsm_db *pDb, void *pVal, int nVal){
  int rc = LSM_OK;
  if( nVal>0 ){
    u32 *aIn;

    aIn = lsmMallocRc(pDb->pEnv, nVal, &rc);
    if( aIn ){
      Level *pLevel = 0;
      Level *pParent;

      int nIn;
      int nLevel;
      int iIn = 1;
      memcpy(aIn, pVal, nVal);
      nIn = nVal / sizeof(u32);

      ckptChangeEndianness(aIn, nIn);
      nLevel = aIn[0];
      rc = ckptLoadLevels(pDb, aIn, &iIn, nLevel, &pLevel);
      lsmFree(pDb->pEnv, aIn);
      assert( rc==LSM_OK || pLevel==0 );
      if( rc==LSM_OK ){
        pParent = lsmDbSnapshotLevel(pDb->pWorker);
        assert( pParent );
        while( pParent->pNext ) pParent = pParent->pNext;
        pParent->pNext = pLevel;
      }
    }
  }

  return rc;
}

/*
** Return the data for the LEVELS record.
**
** The size of the checkpoint that can be stored in the database header
** must not exceed 1024 32-bit integers. Normally, it does not. However,
** if it does, part of the checkpoint must be stored in the LSM. This
** routine returns that part.
*/
int lsmCheckpointLevels(
  lsm_db *pDb,                    /* Database handle */
  int nLevel,                     /* Number of levels to write to blob */
  void **paVal,                   /* OUT: Pointer to LEVELS blob */
  int *pnVal                      /* OUT: Size of LEVELS blob in bytes */
){
  Level *p;                       /* Used to iterate through levels */
  int nAll= 0;
  int rc;
  int i;
  int iOut;
  CkptBuffer ckpt;
  assert( nLevel>0 );

  for(p=lsmDbSnapshotLevel(pDb->pWorker); p; p=p->pNext) nAll++;

  assert( nAll>nLevel );
  nAll -= nLevel;
  for(p=lsmDbSnapshotLevel(pDb->pWorker); p && nAll>0; p=p->pNext) nAll--;

  memset(&ckpt, 0, sizeof(CkptBuffer));
  ckpt.pEnv = pDb->pEnv;

  ckptSetValue(&ckpt, 0, nLevel, &rc);
  iOut = 1;
  for(i=0; rc==LSM_OK && i<nLevel; i++){
    ckptExportLevel(p, &ckpt, &iOut, &rc);
    p = p->pNext;
  }
  assert( rc!=LSM_OK || p==0 );

  if( rc==LSM_OK ){
    ckptChangeEndianness(ckpt.aCkpt, iOut);
    *paVal = (void *)ckpt.aCkpt;
    *pnVal = iOut * sizeof(u32);
  }else{
    *pnVal = 0;
    *paVal = 0;
  }

  return rc;
}

/*
** Read the checkpoint id from meta-page pPg.
*/
static i64 ckptLoadId(MetaPage *pPg){
  i64 ret = 0;
  if( pPg ){
    int nData;
    u8 *aData = lsmFsMetaPageData(pPg, &nData);
    ret = (((i64)lsmGetU32(&aData[CKPT_HDR_ID_MSW*4])) << 32) + 
          ((i64)lsmGetU32(&aData[CKPT_HDR_ID_LSW*4]));
  }
  return ret;
}

/*
** Return true if the buffer passed as an argument contains a valid
** checkpoint.
*/
static int ckptChecksumOk(u32 *aCkpt){
  u32 nCkpt = aCkpt[CKPT_HDR_NCKPT];
  u32 cksum1;
  u32 cksum2;

  if( nCkpt<CKPT_HDR_NCKPT || nCkpt>(LSM_META_RW_PAGE_SIZE)/sizeof(u32) ){
    return 0;
  }
  ckptChecksum(aCkpt, nCkpt, &cksum1, &cksum2);
  return (cksum1==aCkpt[nCkpt-2] && cksum2==aCkpt[nCkpt-1]);
}

/*
** Attempt to load a checkpoint from meta page iMeta.
**
** This function is a no-op if *pRc is set to any value other than LSM_OK
** when it is called. If an error occurs, *pRc is set to an LSM error code
** before returning.
**
** If no error occurs and the checkpoint is successfully loaded, copy it to
** ShmHeader.aSnap1[] and ShmHeader.aSnap2[], and set ShmHeader.iMetaPage 
** to indicate its origin. In this case return 1. Or, if the checkpoint 
** cannot be loaded (because the checksum does not compute), return 0.
*/
static int ckptTryLoad(lsm_db *pDb, MetaPage *pPg, u32 iMeta, int *pRc){
  int bLoaded = 0;                /* Return value */
  if( *pRc==LSM_OK ){
    int rc = LSM_OK;              /* Error code */
    u32 *aCkpt = 0;               /* Pointer to buffer containing checkpoint */
    u32 nCkpt;                    /* Number of elements in aCkpt[] */
    int nData;                    /* Bytes of data in aData[] */
    u8 *aData;                    /* Meta page data */
   
    aData = lsmFsMetaPageData(pPg, &nData);
    nCkpt = (u32)lsmGetU32(&aData[CKPT_HDR_NCKPT*sizeof(u32)]);
    if( nCkpt<=nData/sizeof(u32) && nCkpt>CKPT_HDR_NCKPT ){
      aCkpt = (u32 *)lsmMallocRc(pDb->pEnv, nCkpt*sizeof(u32), &rc);
    }
    if( aCkpt ){
      memcpy(aCkpt, aData, nCkpt*sizeof(u32));
      ckptChangeEndianness(aCkpt, nCkpt);
      if( ckptChecksumOk(aCkpt) ){
        ShmHeader *pShm = pDb->pShmhdr;
        memcpy(pShm->aSnap1, aCkpt, nCkpt*sizeof(u32));
        memcpy(pShm->aSnap2, aCkpt, nCkpt*sizeof(u32));
        memcpy(pDb->aSnapshot, aCkpt, nCkpt*sizeof(u32));
        pShm->iMetaPage = iMeta;
        bLoaded = 1;
      }
    }

    lsmFree(pDb->pEnv, aCkpt);
    *pRc = rc;
  }
  return bLoaded;
}

/*
** Initialize the shared-memory header with an empty snapshot. This function
** is called when no valid snapshot can be found in the database header.
*/
static void ckptLoadEmpty(lsm_db *pDb){
  u32 aCkpt[] = {
    0,                       /* CKPT_HDR_ID_MSW */
    10,                      /* CKPT_HDR_ID_LSW */
    0,                       /* CKPT_HDR_NCKPT */
    LSM_COMPRESSION_EMPTY,   /* CKPT_HDR_CMPID */
    0,                       /* CKPT_HDR_NBLOCK */
    0,                       /* CKPT_HDR_BLKSZ */
    0,                       /* CKPT_HDR_NLEVEL */
    0,                       /* CKPT_HDR_PGSZ */
    0,                       /* CKPT_HDR_NWRITE */
    0, 0, 1234, 5678,        /* The log pointer and initial checksum */
    0,0,0,0, 0,0,0,0,        /* The append list */
    0,                       /* The redirected block list */
    0,                       /* The free block list */
    0, 0                     /* Space for checksum values */
  };
  u32 nCkpt = array_size(aCkpt);
  ShmHeader *pShm = pDb->pShmhdr;

  aCkpt[CKPT_HDR_NCKPT] = nCkpt;
  aCkpt[CKPT_HDR_BLKSZ] = pDb->nDfltBlksz;
  aCkpt[CKPT_HDR_PGSZ] = pDb->nDfltPgsz;
  ckptChecksum(aCkpt, array_size(aCkpt), &aCkpt[nCkpt-2], &aCkpt[nCkpt-1]);

  memcpy(pShm->aSnap1, aCkpt, nCkpt*sizeof(u32));
  memcpy(pShm->aSnap2, aCkpt, nCkpt*sizeof(u32));
  memcpy(pDb->aSnapshot, aCkpt, nCkpt*sizeof(u32));
}

/*
** This function is called as part of database recovery to initialize the
** ShmHeader.aSnap1[] and ShmHeader.aSnap2[] snapshots.
*/
int lsmCheckpointRecover(lsm_db *pDb){
  int rc = LSM_OK;                /* Return Code */
  i64 iId1;                       /* Id of checkpoint on meta-page 1 */
  i64 iId2;                       /* Id of checkpoint on meta-page 2 */
  int bLoaded = 0;                /* True once checkpoint has been loaded */
  int cmp;                        /* True if (iId2>iId1) */
  MetaPage *apPg[2] = {0, 0};     /* Meta-pages 1 and 2 */

  rc = lsmFsMetaPageGet(pDb->pFS, 0, 1, &apPg[0]);
  if( rc==LSM_OK ) rc = lsmFsMetaPageGet(pDb->pFS, 0, 2, &apPg[1]);

  iId1 = ckptLoadId(apPg[0]);
  iId2 = ckptLoadId(apPg[1]);
  cmp = (iId2 > iId1);
  bLoaded = ckptTryLoad(pDb, apPg[cmp?1:0], (cmp?2:1), &rc);
  if( bLoaded==0 ){
    bLoaded = ckptTryLoad(pDb, apPg[cmp?0:1], (cmp?1:2), &rc);
  }

  /* The database does not contain a valid checkpoint. Initialize the shared
  ** memory header with an empty checkpoint.  */
  if( bLoaded==0 ){
    ckptLoadEmpty(pDb);
  }

  lsmFsMetaPageRelease(apPg[0]);
  lsmFsMetaPageRelease(apPg[1]);

  return rc;
}

/* 
** Store the snapshot in pDb->aSnapshot[] in meta-page iMeta.
*/
int lsmCheckpointStore(lsm_db *pDb, int iMeta){
  MetaPage *pPg = 0;
  int rc;

  assert( iMeta==1 || iMeta==2 );
  rc = lsmFsMetaPageGet(pDb->pFS, 1, iMeta, &pPg);
  if( rc==LSM_OK ){
    u8 *aData;
    int nData;
    int nCkpt;

    nCkpt = (int)pDb->aSnapshot[CKPT_HDR_NCKPT];
    aData = lsmFsMetaPageData(pPg, &nData);
    memcpy(aData, pDb->aSnapshot, nCkpt*sizeof(u32));
    ckptChangeEndianness((u32 *)aData, nCkpt);
    rc = lsmFsMetaPageRelease(pPg);
  }
      
  return rc;
}

/*
** Copy the current client snapshot from shared-memory to pDb->aSnapshot[].
*/
int lsmCheckpointLoad(lsm_db *pDb, int *piRead){
  int nRem = LSM_ATTEMPTS_BEFORE_PROTOCOL;
  ShmHeader *pShm = pDb->pShmhdr;
  while( (nRem--)>0 ){
    int nInt;

    nInt = pShm->aSnap1[CKPT_HDR_NCKPT];
    if( nInt<=(LSM_META_RW_PAGE_SIZE / sizeof(u32)) ){
      memcpy(pDb->aSnapshot, pShm->aSnap1, nInt*sizeof(u32));
      if( ckptChecksumOk(pDb->aSnapshot) ){
        if( piRead ) *piRead = 1;
        return LSM_OK;
      }
    }

    nInt = pShm->aSnap2[CKPT_HDR_NCKPT];
    if( nInt<=(LSM_META_RW_PAGE_SIZE / sizeof(u32)) ){
      memcpy(pDb->aSnapshot, pShm->aSnap2, nInt*sizeof(u32));
      if( ckptChecksumOk(pDb->aSnapshot) ){
        if( piRead ) *piRead = 2;
        return LSM_OK;
      }
    }

    lsmShmBarrier(pDb);
  }
  return LSM_PROTOCOL_BKPT;
}

int lsmInfoCompressionId(lsm_db *db, u32 *piCmpId){
  int rc;

  assert( db->pClient==0 && db->pWorker==0 );
  rc = lsmCheckpointLoad(db, 0);
  if( rc==LSM_OK ){
    *piCmpId = db->aSnapshot[CKPT_HDR_CMPID];
  }

  return rc;
}

int lsmCheckpointLoadOk(lsm_db *pDb, int iSnap){
  u32 *aShm;
  assert( iSnap==1 || iSnap==2 );
  aShm = (iSnap==1) ? pDb->pShmhdr->aSnap1 : pDb->pShmhdr->aSnap2;
  return (lsmCheckpointId(pDb->aSnapshot, 0)==lsmCheckpointId(aShm, 0) );
}

int lsmCheckpointClientCacheOk(lsm_db *pDb){
  return ( pDb->pClient 
        && pDb->pClient->iId==lsmCheckpointId(pDb->aSnapshot, 0)
        && pDb->pClient->iId==lsmCheckpointId(pDb->pShmhdr->aSnap1, 0)
        && pDb->pClient->iId==lsmCheckpointId(pDb->pShmhdr->aSnap2, 0)
  );
}

int lsmCheckpointLoadWorker(lsm_db *pDb){
  int rc;
  ShmHeader *pShm = pDb->pShmhdr;
  int nInt1;
  int nInt2;

  /* Must be holding the WORKER lock to do this. Or DMS2. */
  assert( 
      lsmShmAssertLock(pDb, LSM_LOCK_WORKER, LSM_LOCK_EXCL) 
   || lsmShmAssertLock(pDb, LSM_LOCK_DMS1, LSM_LOCK_EXCL) 
  );

  /* Check that the two snapshots match. If not, repair them. */
  nInt1 = pShm->aSnap1[CKPT_HDR_NCKPT];
  nInt2 = pShm->aSnap2[CKPT_HDR_NCKPT];
  if( nInt1!=nInt2 || memcmp(pShm->aSnap1, pShm->aSnap2, nInt2*sizeof(u32)) ){
    if( ckptChecksumOk(pShm->aSnap1) ){
      memcpy(pShm->aSnap2, pShm->aSnap1, sizeof(u32)*nInt1);
    }else if( ckptChecksumOk(pShm->aSnap2) ){
      memcpy(pShm->aSnap1, pShm->aSnap2, sizeof(u32)*nInt2);
    }else{
      return LSM_PROTOCOL_BKPT;
    }
  }

  rc = lsmCheckpointDeserialize(pDb, 1, pShm->aSnap1, &pDb->pWorker);
  if( pDb->pWorker ) pDb->pWorker->pDatabase = pDb->pDatabase;

  if( rc==LSM_OK ){
    rc = lsmCheckCompressionId(pDb, pDb->pWorker->iCmpId);
  }

#if 0
  assert( rc!=LSM_OK || lsmFsIntegrityCheck(pDb) );
#endif
  return rc;
}

int lsmCheckpointDeserialize(
  lsm_db *pDb, 
  int bInclFreelist,              /* If true, deserialize free-list */
  u32 *aCkpt, 
  Snapshot **ppSnap
){
  int rc = LSM_OK;
  Snapshot *pNew;

  pNew = (Snapshot *)lsmMallocZeroRc(pDb->pEnv, sizeof(Snapshot), &rc);
  if( rc==LSM_OK ){
    Level *pLvl;
    int nFree;
    int i;
    int nLevel = (int)aCkpt[CKPT_HDR_NLEVEL];
    int iIn = CKPT_HDR_SIZE + CKPT_APPENDLIST_SIZE + CKPT_LOGPTR_SIZE;

    pNew->iId = lsmCheckpointId(aCkpt, 0);
    pNew->nBlock = aCkpt[CKPT_HDR_NBLOCK];
    pNew->nWrite = aCkpt[CKPT_HDR_NWRITE];
    rc = ckptLoadLevels(pDb, aCkpt, &iIn, nLevel, &pNew->pLevel);
    pNew->iLogOff = lsmCheckpointLogOffset(aCkpt);
    pNew->iCmpId = aCkpt[CKPT_HDR_CMPID];

    /* Make a copy of the append-list */
    for(i=0; i<LSM_APPLIST_SZ; i++){
      u32 *a = &aCkpt[CKPT_HDR_SIZE + CKPT_LOGPTR_SIZE + i*2];
      pNew->aiAppend[i] = ckptRead64(a);
    }

    /* Read the block-redirect list */
    pNew->redirect.n = aCkpt[iIn++];
    if( pNew->redirect.n ){
      pNew->redirect.a = lsmMallocZeroRc(pDb->pEnv, 
          (sizeof(struct RedirectEntry) * LSM_MAX_BLOCK_REDIRECTS), &rc
      );
      if( rc==LSM_OK ){
        for(i=0; i<pNew->redirect.n; i++){
          pNew->redirect.a[i].iFrom = aCkpt[iIn++];
          pNew->redirect.a[i].iTo = aCkpt[iIn++];
        }
      }
      for(pLvl=pNew->pLevel; pLvl->pNext; pLvl=pLvl->pNext);
      if( pLvl->nRight ){
        pLvl->aRhs[pLvl->nRight-1].pRedirect = &pNew->redirect;
      }else{
        pLvl->lhs.pRedirect = &pNew->redirect;
      }
    }

    /* Copy the free-list */
    if( rc==LSM_OK && bInclFreelist ){
      nFree = aCkpt[iIn++];
      if( nFree ){
        pNew->freelist.aEntry = (FreelistEntry *)lsmMallocZeroRc(
            pDb->pEnv, sizeof(FreelistEntry)*nFree, &rc
        );
        if( rc==LSM_OK ){
          int i;
          for(i=0; i<nFree; i++){
            FreelistEntry *p = &pNew->freelist.aEntry[i];
            p->iBlk = aCkpt[iIn++];
            p->iId = ((i64)(aCkpt[iIn])<<32) + aCkpt[iIn+1];
            iIn += 2;
          }
          pNew->freelist.nEntry = pNew->freelist.nAlloc = nFree;
        }
      }
    }
  }

  if( rc!=LSM_OK ){
    lsmFreeSnapshot(pDb->pEnv, pNew);
    pNew = 0;
  }

  *ppSnap = pNew;
  return rc;
}

/*
** Connection pDb must be the worker connection in order to call this
** function. It returns true if the database already contains the maximum
** number of levels or false otherwise.
**
** This is used when flushing the in-memory tree to disk. If the database
** is already full, then the caller should invoke lsm_work() or similar
** until it is not full before creating a new level by flushing the in-memory
** tree to disk. Limiting the number of levels in the database ensures that
** the records describing them always fit within the checkpoint blob.
*/
int lsmDatabaseFull(lsm_db *pDb){
  Level *p;
  int nRhs = 0;

  assert( lsmShmAssertLock(pDb, LSM_LOCK_WORKER, LSM_LOCK_EXCL) );
  assert( pDb->pWorker );

  for(p=pDb->pWorker->pLevel; p; p=p->pNext){
    nRhs += (p->nRight ? p->nRight : 1);
  }

  return (nRhs >= LSM_MAX_RHS_SEGMENTS);
}

/*
** The connection passed as the only argument is currently the worker
** connection. Some work has been performed on the database by the connection,
** but no new snapshot has been written into shared memory.
**
** This function updates the shared-memory worker and client snapshots with
** the new snapshot produced by the work performed by pDb.
**
** If successful, LSM_OK is returned. Otherwise, if an error occurs, an LSM
** error code is returned.
*/
int lsmCheckpointSaveWorker(lsm_db *pDb, int bFlush){
  Snapshot *pSnap = pDb->pWorker;
  ShmHeader *pShm = pDb->pShmhdr;
  void *p = 0;
  int n = 0;
  int rc;

  pSnap->iId++;
  rc = ckptExportSnapshot(pDb, bFlush, pSnap->iId, 1, &p, &n);
  if( rc!=LSM_OK ) return rc;
  assert( ckptChecksumOk((u32 *)p) );

  assert( n<=LSM_META_RW_PAGE_SIZE );
  memcpy(pShm->aSnap2, p, n);
  lsmShmBarrier(pDb);
  memcpy(pShm->aSnap1, p, n);
  lsmFree(pDb->pEnv, p);

  /* assert( lsmFsIntegrityCheck(pDb) ); */
  return LSM_OK;
}

/*
** This function is used to determine the snapshot-id of the most recently
** checkpointed snapshot. Variable ShmHeader.iMetaPage indicates which of
** the two meta-pages said snapshot resides on (if any). 
**
** If successful, this function loads the snapshot from the meta-page, 
** verifies its checksum and sets *piId to the snapshot-id before returning
** LSM_OK. Or, if the checksum attempt fails, *piId is set to zero and
** LSM_OK returned. If an error occurs, an LSM error code is returned and
** the final value of *piId is undefined.
*/
int lsmCheckpointSynced(lsm_db *pDb, i64 *piId, i64 *piLog, u32 *pnWrite){
  int rc = LSM_OK;
  MetaPage *pPg;
  u32 iMeta;

  iMeta = pDb->pShmhdr->iMetaPage;
  if( iMeta==1 || iMeta==2 ){
    rc = lsmFsMetaPageGet(pDb->pFS, 0, iMeta, &pPg);
    if( rc==LSM_OK ){
      int nCkpt;
      int nData;
      u8 *aData; 

      aData = lsmFsMetaPageData(pPg, &nData);
      assert( nData==LSM_META_RW_PAGE_SIZE );
      nCkpt = lsmGetU32(&aData[CKPT_HDR_NCKPT*sizeof(u32)]);
      if( nCkpt<(LSM_META_RW_PAGE_SIZE/sizeof(u32)) ){
        u32 *aCopy = lsmMallocRc(pDb->pEnv, sizeof(u32) * nCkpt, &rc);
        if( aCopy ){
          memcpy(aCopy, aData, nCkpt*sizeof(u32));
          ckptChangeEndianness(aCopy, nCkpt);
          if( ckptChecksumOk(aCopy) ){
            if( piId ) *piId = lsmCheckpointId(aCopy, 0);
            if( piLog ) *piLog = (lsmCheckpointLogOffset(aCopy) >> 1);
            if( pnWrite ) *pnWrite = aCopy[CKPT_HDR_NWRITE];
          }
          lsmFree(pDb->pEnv, aCopy);
        }
      }
      lsmFsMetaPageRelease(pPg);
    }
  }

  if( (iMeta!=1 && iMeta!=2) || rc!=LSM_OK || pDb->pShmhdr->iMetaPage!=iMeta ){
    if( piId ) *piId = 0;
    if( piLog ) *piLog = 0;
    if( pnWrite ) *pnWrite = 0;
  }
  return rc;
}

/*
** Return the checkpoint-id of the checkpoint array passed as the first
** argument to this function. If the second argument is true, then assume
** that the checkpoint is made up of 32-bit big-endian integers. If it
** is false, assume that the integers are in machine byte order.
*/
i64 lsmCheckpointId(u32 *aCkpt, int bDisk){
  i64 iId;
  if( bDisk ){
    u8 *aData = (u8 *)aCkpt;
    iId = (((i64)lsmGetU32(&aData[CKPT_HDR_ID_MSW*4])) << 32);
    iId += ((i64)lsmGetU32(&aData[CKPT_HDR_ID_LSW*4]));
  }else{
    iId = ((i64)aCkpt[CKPT_HDR_ID_MSW] << 32) + (i64)aCkpt[CKPT_HDR_ID_LSW];
  }
  return iId;
}

u32 lsmCheckpointNBlock(u32 *aCkpt){
  return aCkpt[CKPT_HDR_NBLOCK];
}

u32 lsmCheckpointNWrite(u32 *aCkpt, int bDisk){
  if( bDisk ){
    return lsmGetU32((u8 *)&aCkpt[CKPT_HDR_NWRITE]);
  }else{
    return aCkpt[CKPT_HDR_NWRITE];
  }
}

i64 lsmCheckpointLogOffset(u32 *aCkpt){
  return ((i64)aCkpt[CKPT_HDR_LO_MSW] << 32) + (i64)aCkpt[CKPT_HDR_LO_LSW];
}

int lsmCheckpointPgsz(u32 *aCkpt){ return (int)aCkpt[CKPT_HDR_PGSZ]; }

int lsmCheckpointBlksz(u32 *aCkpt){ return (int)aCkpt[CKPT_HDR_BLKSZ]; }

void lsmCheckpointLogoffset(
  u32 *aCkpt,
  DbLog *pLog
){ 
  pLog->aRegion[2].iStart = (lsmCheckpointLogOffset(aCkpt) >> 1);

  pLog->cksum0 = aCkpt[CKPT_HDR_LO_CKSUM1];
  pLog->cksum1 = aCkpt[CKPT_HDR_LO_CKSUM2];
  pLog->iSnapshotId = lsmCheckpointId(aCkpt, 0);
}

void lsmCheckpointZeroLogoffset(lsm_db *pDb){
  u32 nCkpt;

  nCkpt = pDb->aSnapshot[CKPT_HDR_NCKPT];
  assert( nCkpt>CKPT_HDR_NCKPT );
  assert( nCkpt==pDb->pShmhdr->aSnap1[CKPT_HDR_NCKPT] );
  assert( 0==memcmp(pDb->aSnapshot, pDb->pShmhdr->aSnap1, nCkpt*sizeof(u32)) );
  assert( 0==memcmp(pDb->aSnapshot, pDb->pShmhdr->aSnap2, nCkpt*sizeof(u32)) );

  pDb->aSnapshot[CKPT_HDR_LO_MSW] = 0;
  pDb->aSnapshot[CKPT_HDR_LO_LSW] = 0;
  ckptChecksum(pDb->aSnapshot, nCkpt, 
      &pDb->aSnapshot[nCkpt-2], &pDb->aSnapshot[nCkpt-1]
  );

  memcpy(pDb->pShmhdr->aSnap1, pDb->aSnapshot, nCkpt*sizeof(u32));
  memcpy(pDb->pShmhdr->aSnap2, pDb->aSnapshot, nCkpt*sizeof(u32));
}

/*
** Set the output variable to the number of KB of data written into the
** database file since the most recent checkpoint.
*/
int lsmCheckpointSize(lsm_db *db, int *pnKB){
  int rc = LSM_OK;
  u32 nSynced;

  /* Set nSynced to the number of pages that had been written when the 
  ** database was last checkpointed. */
  rc = lsmCheckpointSynced(db, 0, 0, &nSynced);

  if( rc==LSM_OK ){
    u32 nPgsz = db->pShmhdr->aSnap1[CKPT_HDR_PGSZ];
    u32 nWrite = db->pShmhdr->aSnap1[CKPT_HDR_NWRITE];
    *pnKB = (int)(( ((i64)(nWrite - nSynced) * nPgsz) + 1023) / 1024);
  }

  return rc;
}

Added ext/lsm1/lsm_file.c.



















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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