SQLite

# it at configure-time instead of calculate it at make-time.
#
#TCL_INCLUDE_SPEC = @TCL_INCLUDE_SPEC@
#TCL_LIB_SPEC = @TCL_LIB_SPEC@
#TCL_STUB_LIB_SPEC = @TCL_STUB_LIB_SPEC@
#TCL_EXEC_PREFIX = @TCL_EXEC_PREFIX@
#TCL_VERSION = @TCL_VERSION@
TCL_MAJOR_VERSION = @TCL_MAJOR_VERSION@
# ^^^ main.mk optionally uses this for determining the Tcl extension's
# DLL name.
TCL_EXT_DLL_BASENAME = @TCL_EXT_DLL_BASENAME@
# ^^^ base name of the Tcl extension DLL. It varies by platform and
# Tcl version.

#
# $(TCLLIBDIR) = where to install the tcl plugin. If this is empty, it
# is calculated at make-time by the targets which need it but we
# export it here so that it can be set at configure-time, so that
# clients are not required to pass it at make-time, or may set it in
# their environment to override it.
#

  $(TOP)\src\test_superlock.c \
  $(TOP)\src\test_syscall.c \
  $(TOP)\src\test_tclsh.c \
  $(TOP)\src\test_tclvar.c \
  $(TOP)\src\test_thread.c \
  $(TOP)\src\test_vdbecov.c \
  $(TOP)\src\test_vfs.c \

  $(TOP)\src\test_window.c \
  $(TOP)\src\test_wsd.c \
  $(TOP)\ext\fts3\fts3_term.c \
  $(TOP)\ext\fts3\fts3_test.c \
  $(TOP)\ext\rbu\test_rbu.c \
  $(TOP)\ext\session\test_session.c

    $(TOP)\ext\misc\sha1.c \
    $(TOP)\ext\misc\shathree.c \
    $(TOP)\ext\misc\sqlar.c \
    $(TOP)\ext\misc\sqlite3_stdio.c \
    $(TOP)\ext\misc\sqlite3_stdio.h \
    $(TOP)\ext\misc\uint.c \
    $(TOP)\ext\misc\vfstrace.c \
    $(TOP)\ext\misc\windirent.h \
    $(TOP)\ext\misc\zipfile.c \
    $(TOP)\ext\recover\dbdata.c \
    $(TOP)\ext\recover\sqlite3recover.c \
    $(TOP)\ext\recover\sqlite3recover.h



# If use of zlib is enabled, add the "zipfile.c" source file.
#
!IF $(USE_ZLIB)!=0
SHELL_DEP = $(SHELL_DEP) $(TOP)\ext\misc\sqlar.c
SHELL_DEP = $(SHELL_DEP) $(TOP)\ext\misc\zipfile.c
!ENDIF

		| $(TCLSH_CMD) $(TOP)\tool\replace.tcl exact "void (*freeProc)" "void (SQLITE_TCLAPI *freeProc)" \
		| $(TCLSH_CMD) $(TOP)\tool\replace.tcl exact "Tcl_HashEntry *(*findProc)" "Tcl_HashEntry *(SQLITE_TCLAPI *findProc)" \
		| $(TCLSH_CMD) $(TOP)\tool\replace.tcl exact "Tcl_HashEntry *(*createProc)" "Tcl_HashEntry *(SQLITE_TCLAPI *createProc)" >> $(SQLITETCLH)
!ENDIF

testfixture.exe:	$(TESTFIXTURE_SRC) $(TESTFIXTURE_DEP) $(SQLITE3H) $(LIBRESOBJS) $(HDR) $(SQLITE_TCL_DEP)
	$(LTLINK) -DSQLITE_NO_SYNC=1 $(TESTFIXTURE_FLAGS) \
		-DBUILD_sqlite -I$(TCLINCDIR) -I$(TOP)\ext\misc \
		$(TESTFIXTURE_SRC) \
		/link $(LDFLAGS) $(LTLINKOPTS) $(TCLLIBPATHS) $(LTLIBPATHS) $(LIBRESOBJS) $(TCLLIBS) $(LTLIBS) $(TLIBS)

# A small helper for manually running individual tests
tf.bat: testfixture.exe Makefile.msc
	echo @set PATH=$(LIBTCLPATH);%PATH% > $@
	echo .\testfixture.exe %* >> $@

# are up-to-date.
#
srctree-check:	$(TOP)\tool\srctree-check.tcl
	$(TCLSH_CMD) $(TOP)\tool\srctree-check.tcl

# Testing for a release
#
releasetest: verify-source
	$(TCLSH_CMD) $(TOP)\test\testrunner.tcl release

# xdevtest is like releasetest, except that it skips the
# dependency on verify-source so that xdevtest can be run from
# a modified source tree.
#
xdevtest:	
	$(TCLSH_CMD) $(TOP)\test\testrunner.tcl release


smoketest:	$(TESTPROGS)
	@set PATH=$(LIBTCLPATH);$(PATH)
	.\testfixture.exe $(TOP)\test\main.test $(TESTOPTS)

3.51.0

#
# Flags to link the shell app either directly against sqlite3.c
# (ENABLE_STATIC_SHELL==1) or libsqlite3.so (ENABLE_STATIC_SHELL==0).
#
ENABLE_STATIC_SHELL = @ENABLE_STATIC_SHELL@
sqlite3-shell-link-flags.1 = $(TOP)/sqlite3.c $(LDFLAGS.libsqlite3)
sqlite3-shell-link-flags.0 = -L. -lsqlite3 $(LDFLAGS.zlib) $(LDFLAGS.math)
sqlite3-shell-deps.1 = $(TOP)/sqlite3.c
sqlite3-shell-deps.0 = $(libsqlite3.DLL)
#
# STATIC_CLI_SHELL = 1 to statically link sqlite3$(T.exe), else
# 0. Requires static versions of all requisite libraries. Primarily
# intended for use with static-friendly environments like Alpine
# Linux.

#
# tx.src is the list of source or object files to include in the
# (single) compiler/linker invocation. This will initially contain any
# sources passed to [teaish-src-add], but may also be appended to by
# teaish.make.
#
tx.src     = @TEAISH_EXT_SRC@

#
# tx.CFLAGS is typically set by teaish.make, whereas TEAISH_CFLAGS
# gets set up via the configure script.
#
tx.CFLAGS  =

#
# tx.LDFLAGS is typically set by teaish.make, whereas TEAISH_LDFLAGS
# gets set up via the configure script.
#
tx.LDFLAGS =

#
# The list of 'dist' files may be appended to from teaish.make.in.
# It can also be set up from teaish.tcl using [teaish-dist-add]
# and/or [teaish-src-add -dist ...].
#
tx.dist.files = @TEAISH_DIST_FILES@

#
# The base name for a distribution tar/zip file.
#
tx.dist.basename = $(tx.name.dist)-$(tx.version)

# List of deps which may trigger an auto-reconfigure.
#
teaish__autogen.deps = \
  $(tx.makefile.in) $(teaish.makefile.in) \
  $(tx.tcl) \
  @TEAISH_PKGINDEX_TCL_IN@ @TEAISH_TM_TCL_IN@ \
  @AUTODEPS@

reconfigure:
	$(teaish.autoreconfig)

$(teaish.makefile): $(teaish__auto.def) $(teaish.makefile.in) \
  @AUTODEPS@

@if TEAISH_TESTER_TCL_IN
@TEAISH_TESTER_TCL_IN@: $(teaish__autogen.deps)
config.log: @TEAISH_TESTER_TCL_IN@
@TEAISH_TESTER_TCL@:  @TEAISH_TESTER_TCL_IN@
@endif
@if TEAISH_TEST_TCL_IN
@TEAISH_TEST_TCL_IN@: $(teaish__autogen.deps)
config.log: @TEAISH_TEST_TCL_IN@
@TEAISH_TEST_TCL@: @TEAISH_TEST_TCL_IN@
@endif

#
# CC variant for compiling Tcl-using sources.
#
CC.tcl = \
  $(CC) -o $@ $(CFLAGS.configure) $(CFLAGS) $(tx.CFLAGS)

#
# CC variant for linking $(tx.src) into an extension DLL.  Note that
# $(tx.src) must come before $(LDFLAGS...) for linking to third-party
# libs to work.
#
CC.dll = \
  $(CC.tcl) $(tx.src) $(LDFLAGS.shlib) \
    $(tx.LDFLAGS) $(LDFLAGS.configure) $(LDFLAGS) $(TCL_STUB_LIB_SPEC)

@if TEAISH_ENABLE_DLL
#
# The rest of this makefile exists solely to support this brief
# target: the extension shared lib.
#
$(tx.dll): $(tx.src) config.log

#
.PHONY: test-pre test-prepre test-core test test-post test-extension
test-extension: # this name is reserved for use by teaish.make[.in]
@if TEAISH_ENABLE_DLL
test-prepre: $(tx.dll)
@endif
@if TEAISH_TESTER_TCL
teaish.tester.tcl = @TEAISH_TESTER_TCL@
test-core.args = $(teaish.tester.tcl)
@if TEAISH_ENABLE_DLL
test-core.args += '$(tx.dll)' '$(tx.loadPrefix)'
@else
test-core.args += '' ''
@endif
test-core.args += @TEAISH_TESTUTIL_TCL@
# Clients may pass additional args via test.args=...
# and ::argv will be rewritten before the test script loads, to
# remove $(test-core.args)
test.args ?=
test-core: test-pre
	$(TCLSH) $(test-core.args) $(test.args)
test-gdb: $(teaish.tester.tcl)
	gdb --args $(TCLSH) $(test-core.args) $(test.args)
test-vg.flags ?= --leak-check=full -v --show-reachable=yes --track-origins=yes
test-vg: $(teaish.tester.tcl)
	valgrind $(test-vg.flags) $(TCLSH) $(test-core.args) $(test.args)
@else # !TEAISH_TESTER_TCL
test-prepre:
@endif # TEAISH_TESTER_TCL
test-pre: test-prepre
test-core: test-pre
test-post: test-core
test: test-post

	rm -f config.log config.defines.txt
@if TEAISH_MAKEFILE_IN
@if TEAISH_MAKEFILE
	rm -f @TEAISH_MAKEFILE@
@endif
@endif
@if TEAISH_TESTER_TCL_IN
	rm -f $(teaish.tester.tcl)
@endif
@if TEAISH_PKGINDEX_TCL_IN
	rm -f @TEAISH_PKGINDEX_TCL@
@endif
@if TEAISH_PKGINIT_TCL_IN
	rm -f @TEAISH_PKGINIT_TCL@
@endif

	@if [ ! -d "$(install-core.tmdir)" ]; then \
		set -x; $(INSTALL) -d "$(install-core.tmdir)"; \
	fi
	$(INSTALL.noexec) "@TEAISH_TM_TCL@" "$(install-core.tmdir)/$(tx.tm.tgt)"
@endif
install-test: install-core
	@echo "Post-install test of [package require $(tx.name.pkg) $(tx.version)]..."; \
	set xtra=""; \
	if [ x != "x$(DESTDIR)" ]; then \
		xtra='set ::auto_path [linsert $$::auto_path 0 [file normalize $(DESTDIR)$(TCLLIBDIR)/..]];'; \
	fi; \
	if echo \
		'set c 0; ' $$xtra \
		'@TEAISH_POSTINST_PREREQUIRE@' \
		'if {[catch {package require $(tx.name.pkg) $(tx.version)} xc]} {incr c};' \
		'if {$$c && "" ne $$xc} {puts $$xc; puts "auto_path=$$::auto_path"};' \
		'exit $$c' \
		| $(TCLSH) ; then \
		echo "passed"; \
	else \
		echo "FAILED"; \
		exit 1; \
	fi

# When installing teaish as part of "make dist", we need to run
# configure with similar flags to what we last configured with but we
# must not pass on any extension-specific flags, as those won't be
# recognized when running in --teaish-install mode, causing
# the sub-configure to fail.
dist.flags = --with-tclsh=$(TCLSH)
dist.reconfig = $(teaish.dir)/configure $(tx.dist.reconfig-flags) $(dist.flags)

# Temp dir for dist.zip. Must be different than dist.tgz or else
# parallel builds may hose the dist.
teaish__dist.tmp.zip = teaish__dist_zip
#
# Make a distribution zip file...
#

dist.zip = $(tx.dist.basename).zip
.PHONY: dist.zip dist.zip-core dist.zip-post
#dist.zip-pre:
# We apparently can't add a pre-hook here, else "make dist" rebuilds
# the archive each time it's run.
$(dist.zip): $(tx.dist.files)
	@rm -fr $(teaish__dist.tmp.zip)
	@mkdir -p $(teaish__dist.tmp.zip)/$(tx.dist.basename)
	@tar cf $(teaish__dist.tmp.zip)/tmp.tar $(tx.dist.files)
	@tar xf $(teaish__dist.tmp.zip)/tmp.tar -C $(teaish__dist.tmp.zip)/$(tx.dist.basename)
@if TEAISH_DIST_FULL
	@$(dist.reconfig) \
		--teaish-install=$(teaish__dist.tmp.zip)/$(tx.dist.basename) \
		--t-e-d=$(teaish__dist.tmp.zip)/$(tx.dist.basename) >/dev/null
@endif
	@rm -f $(tx.dist.basename)/tmp.tar $(dist.zip)
	@cd $(teaish__dist.tmp.zip) && zip -q -r ../$(dist.zip) $(tx.dist.basename)
	@rm -fr $(teaish__dist.tmp.zip)
	@ls -la $(dist.zip)
dist.zip-core: $(dist.zip)
dist.zip-post: dist.zip-core
dist.zip: dist.zip-post
dist: dist.zip
undist-zip:
	rm -f $(dist.zip)
undist: undist-zip
@endif #BIN_ZIP

#
# Make a distribution tarball...
#
teaish__dist.tmp.tgz = teaish__dist_tgz
dist.tgz = $(tx.dist.basename).tar.gz
.PHONY: dist.tgz dist.tgz-core dist.tgz-post
# dist.tgz-pre:
# see notes in dist.zip
$(dist.tgz): $(tx.dist.files)
	@rm -fr $(teaish__dist.tmp.tgz)
	@mkdir -p $(teaish__dist.tmp.tgz)/$(tx.dist.basename)
	@tar cf $(teaish__dist.tmp.tgz)/tmp.tar $(tx.dist.files)
	@tar xf $(teaish__dist.tmp.tgz)/tmp.tar -C $(teaish__dist.tmp.tgz)/$(tx.dist.basename)
@if TEAISH_DIST_FULL
	@rm -f $(teaish__dist.tmp.tgz)/$(tx.dist.basename)/pkgIndex.tcl.in; # kludge
	@$(dist.reconfig) \
		--teaish-install=$(teaish__dist.tmp.tgz)/$(tx.dist.basename) \
		--t-e-d=$(teaish__dist.tmp.zip)/$(tx.dist.basename) >/dev/null
@endif
	@rm -f $(tx.dist.basename)/tmp.tar $(dist.tgz)
	@cd $(teaish__dist.tmp.tgz) && tar czf ../$(dist.tgz) $(tx.dist.basename)
	@rm -fr $(teaish__dist.tmp.tgz)
	@ls -la $(dist.tgz)
dist.tgz-core: $(dist.tgz)
dist.tgz-post: dist.tgz-core
dist.tgz: dist.tgz-post
dist: dist.tgz
undist-tgz:

In both of the above, replace $(TCLSH) with the full pathname of
of the tclsh that you want the SQLite extension to work with.  See
step-by-step instructions at the links below for more information:

    https://sqlite.org/src/doc/trunk/doc/compile-for-unix.md
    https://sqlite.org/src/doc/trunk/doc/compile-for-windows.md

And info about the extension's Tcl interface can be found at:

    https://sqlite.org/tclsqlite.html

The whole point of the amalgamation-autoconf tarball (in which this
README.txt file is embedded) is to provide a means of compiling SQLite
that does not require first installing TCL and/or "tclsh".  The
canonical Makefile in the SQLite source tree provides more
capabilities (such as the the ability to run test cases to ensure that
the build worked) and is better maintained.  The only downside of the
canonical Makefile is that it requires a TCL installation.  But if you
are wanting to build the TCL extension for SQLite, then presumably you
already have a TCL installation.  So why not just use the more-capable
and better-maintained canoncal Makefile?

As of version 3.50.0, this build process uses "teaish":

    https://fossil.wanderinghorse.net/r/teaish

which is conceptually derived from the pre-3.50 toolchain, TEA:

    http://core.tcl-lang.org/tclconfig
    http://core.tcl-lang.org/sampleextension


It to works for us.  It might also work for you.  But we cannot
promise that.

If you want to use this TEA builder and it works for you, that's fine.
But if you have trouble, the first thing you should do is go back
to using the canonical Makefile in the SQLite source tree.

------------------------------------------------------------------


UNIX BUILD
==========

Building under most UNIX systems is easy, just run the configure
script and then run make. For example:



	$ cd sqlite-*-tea
	$ ./configure --with-tcl=/path/to/tcl/install/root
	$ make test
	$ make install

WINDOWS BUILD
=============







On Windows this build is known to work on Cygwin and some Msys2





environments. We do not currently support Microsoft makefiles for
native Windows builds.

@TEAISH_VSATISFIES_CODE@
@endif
if {[llength [lindex $::argv 0]] > 0} {
  load [file normalize [lindex $::argv 0]] [lindex $::argv 1];
  # ----^^^^^^^ needed on Haiku when argv 0 is just a filename, else
  # load cannot find the file.
}
set ::argv [lassign $argv - -]
source -encoding utf-8 [lindex $::argv 0]; # teaish/tester.tcl
@if TEAISH_PKGINIT_TCL
apply {{file} {
  set dir [file dirname $::argv0]
  source -encoding utf-8 $file
}} [join {@TEAISH_PKGINIT_TCL@}]
@endif
@if TEAISH_TM_TCL

  }

  teaish-pkginfo-set -vars {
    -name sqlite
    -name.pkg sqlite3
    -version $version
    -name.dist $distname

    -libDir sqlite$version
    -pragmas $pragmas
    -src generic/tclsqlite3.c
  }
  # We should also have:
  #    -vsatisfies 8.6-
  # But at least one platform is failing this vsatisfies check
  # for no apparent reason:
  # https://sqlite.org/forum/forumpost/fde857fb8101a4be
}} [teaish-get -dir]


#
# Must return either an empty string or a list in the form accepted by
# autosetup's [options] function.
#
proc teaish-options {} {
  # These flags and defaults mostly derive from the historical TEA

#
# Gets called by tea-configure-core. Must perform any configuration
# work needed for this extension.
#
proc teaish-configure {} {
  use teaish/feature



  if {[proj-opt-was-provided override-sqlite-version]} {
    teaish-pkginfo-set -version [opt-val override-sqlite-version]
    proj-warn "overriding sqlite version number:" [teaish-pkginfo-get -version]
  } elseif {[proj-opt-was-provided with-system-sqlite]
            && [opt-val with-system-sqlite] ne "0"} {
    proj-fatal "when using --with-system-sqlite also use" \
      "--override-sqlite-version to specify a library version number."

# updating global state via feature tests.
#

#
# $proj__Config is an internal-use-only array for storing whatever generic
# internal stuff we need stored.
#
array set ::proj__Config [subst {
  self-tests [get-env proj.self-tests 0]
  verbose-assert [get-env proj.assert-verbose 0]
  isatty [isatty? stdout]
}]


#
# List of dot-in files to filter in the final stages of
# configuration. Some configuration steps may append to this.  Each
# one in this list which exists will trigger the generation of a
# file with that same name, minus the ".in", in the build directory
# (which differ from the source dir in out-of-tree builds).
#
# See: proj-dot-ins-append and proj-dot-ins-process
#
set ::proj__Config(dot-in-files) [list]


#
# @proj-warn msg
#
# Emits a warning message to stderr. All args are appended with a
# space between each.
#
proc proj-warn {args} {
  show-notices
  puts stderr [join [list "WARNING:" \[ [proj-scope 1] \]: {*}$args] " "]
}


#
# Internal impl of [proj-fatal] and [proj-error]. It must be called
# using tailcall.
#
proc proj__faterr {failMode args} {
  show-notices
  set lvl 1
  while {"-up" eq [lindex $args 0]} {
    set args [lassign $args -]
    incr lvl
  }
  if {$failMode} {
    puts stderr [join [list "FATAL:" \[ [proj-scope $lvl] \]: {*}$args]]
    exit 1
  } else {
    error [join [list in \[ [proj-scope $lvl] \]: {*}$args]]
  }
}


#
# @proj-fatal ?-up...? msg...
#
# Emits an error message to stderr and exits with non-0. All args are
# appended with a space between each.
#
# The calling scope's name is used in the error message. To instead
# use the name of a call higher up in the stack, use -up once for each
# additional level.
#
proc proj-fatal {args} {
  tailcall proj__faterr 1 {*}$args
}

#
# @proj-error ?-up...? msg...
#
# Works like proj-fatal but uses [error] intead of [exit].
#
proc proj-error {args} {
  tailcall proj__faterr 0 {*}$args
}


#
# @proj-assert script ?message?
#
# Kind of like a C assert: if uplevel of [list expr $script] is false,
# a fatal error is triggered. The error message, by default, includes
# the body of the failed assertion, but if $msg is set then that is
# used instead.
#
proc proj-assert {script {msg ""}} {
  if {1 eq $::proj__Config(verbose-assert)} {
    msg-result [proj-bold "asserting: $script"]
  }
  if {![uplevel 1 [list expr $script]]} {
    if {"" eq $msg} {
      set msg $script
    }
    tailcall proj__faterr 1 "Assertion failed:" $msg
  }
}

#
# @proj-bold str
#
# If this function believes that the current console might support

# Looks at either the 'host' (==compilation target platform) or
# 'build' (==the being-built-on platform) define value and returns if
# if that value seems to indicate that it represents a Mac platform,
# else returns 0.
#
proc proj-looks-like-mac {{key host}} {
  switch -glob -- [get-define $key] {
    *-*-darwin* {
      # https://sqlite.org/forum/forumpost/7b218c3c9f207646
      # There's at least one Linux out there which matches *apple*.
      return 1
    }
    default {
      return 0
    }
  }
}

# and TARGET_DLLEXT to one of (.so, ,dll, .dylib).
#
# Trivia: for .dylib files, the linker needs the -dynamiclib flag
# instead of -shared.
#
proc proj-dll-extension {} {
  set inner {{key} {
    if {[proj-looks-like-mac $key]} {

      return ".dylib"
    }

    if {[proj-looks-like-windows $key]} {
      return ".dll"
    }

    return ".so"


  }}
  define BUILD_DLLEXT [apply $inner build]
  define TARGET_DLLEXT [apply $inner host]
}

#
# @proj-lib-extension

    2 {
      lappend fileIn {*}$args
    }
    default {
      proj-fatal "Too many arguments: $fileIn $args"
    }
  }
  #puts "******* [proj-scope]: adding [llength $fileIn]-length item: $fileIn"
  lappend ::proj__Config(dot-in-files) $fileIn
}

#
# @proj-dot-ins-list
#
# Returns the current list of [proj-dot-ins-append]'d files, noting

#  associated script, if any, it runs the file through
#  proj-validate-no-unresolved-ats, erroring out if that does.
#
# -clear: after processing, empty the dot-ins list. This effectively
#  makes proj-dot-ins-append available for re-use.
#
proc proj-dot-ins-process {args} {
  proj-parse-flags args flags {
    -touch   "" {return "-touch"}
    -clear    0 {expr 1}
    -validate 0 {expr 1}
  }
  #puts "args=$args"; parray flags
  if {[llength $args] > 0} {
    error "Invalid argument to [proj-scope]: $args"
  }
  foreach f $::proj__Config(dot-in-files) {
    proj-assert {3==[llength $f]} \
      "Expecting proj-dot-ins-list to be stored in 3-entry lists. Got: $f"
    lassign $f fIn fOut fScript
    #puts "DOING $fIn  ==> $fOut"
    proj-make-from-dot-in {*}$flags(-touch) $fIn $fOut
    if {$flags(-validate)} {
      proj-validate-no-unresolved-ats $fOut
    }
    if {"" ne $fScript} {

#
proc proj-validate-no-unresolved-ats {args} {
  foreach f $args {
    set lnno 1
    set isMake [string match {*[Mm]ake*} $f]
    foreach line [proj-file-content-list $f] {
      if {!$isMake || ![string match "#*" [string trimleft $line]]} {
        if {[regexp {(@[A-Za-z0-9_\.]+@)} $line match]} {
          error "Unresolved reference to $match at line $lnno of $f"
        }
      }
      incr lnno
    }
  }
}

#
# By default it returns the result as string of all -D... flags,
# but if passed the -list flag it will return a list of the
# individual CFLAGS.
#
proc proj-define-to-cflag {args} {
  set rv {}
  proj-parse-flags args flags {
    -list       0 {expr 1}
    -quote      0 {expr 1}
    -zero-undef 0 {expr 1}
  }
  foreach d $args {
    set v [get-define $d ""]
    set li {}

# @proj-cache-set ?-key KEY? ?-level 0? value
#
# Sets a feature-check cache entry with the given key.
#
# See proj-cache-key for -key's and -level's semantics, noting that
# this function adds one to -level for purposes of that call.
proc proj-cache-set {args} {
  proj-parse-flags args flags {
    -key => 0
    -level => 0
  }
  lassign $args val
  set key [proj-cache-key $flags(-key) [expr {1 + $flags(-level)}]]
  #puts "** fcheck set $key = $val"
  set ::proj__Cache($key) $val

# If the feature-check cache has a matching entry then this function
# assigns its value to tgtVar and returns 1, else it assigns tgtVar to
# "" and returns 0.
#
# See proj-cache-key for $key's and $addLevel's semantics, noting that
# this function adds one to $addLevel for purposes of that call.
proc proj-cache-check {args} {
  proj-parse-flags args flags {
    -key => 0
    -level => 0
  }
  lassign $args tgtVar
  upvar $tgtVar tgt
  set rc 0
  set key [proj-cache-key $flags(-key) [expr {1 + $flags(-level)}]]

      return $arg
    }
  }
  return ""
}

#
# @proj-parse-flags argvListName targetArrayName {prototype}
#
# A helper to parse flags from proc argument lists.
#
# The first argument is the name of a var holding the args to
# parse. It will be overwritten, possibly with a smaller list.
#
# The second argument is the name of an array variable to create in
# the caller's scope.
#
# The third argument, $prototype, is a description of how to handle
# the flags. Each entry in that list must be in one of the
# following forms:
#
#   -flag  defaultValue ?-literal|-call|-apply?
#                       script|number|incr|proc-name|{apply $aLambda}
#
#   -flag* ...as above...
#
#   -flag  => defaultValue ?-call proc-name-and-args|-apply lambdaExpr?
#
#   -flag* => ...as above...
#
#   :PRAGMA
#
# The first two forms represents a basic flag with no associated
# following argument. The third and fourth forms, called arg-consuming
# flags, extract the value from the following argument in $argvName
# (pneumonic: => points to the next argument.). The :PRAGMA form
# offers a way to configure certain aspects of this call.
#
# If $argv contains any given flag from $prototype, its default value
# is overridden depending on several factors:
#
#  - If the -literal flag is used, or the flag's script is a number,
#    value is used verbatim.
#
#  - Else if the -call flag is used, the argument must be a proc name
#    and any leading arguments, e.g. {apply $myLambda}.  The proc is passed
#    the (flag, value) as arguments (non-consuming flags will get
#    passed the flag's current/starting value and consuming flags will
#    get the next argument).  Its result becomes the result of the
#    flag.
#

#  - Else if -apply X is used, it's effectively shorthand for -call
#    {apply X}. Its argument may either be a $lambaRef or a {{f v}
#    {body}} construct.
#
#  - Else if $script is one of the following values, it is treated as
#    the result of...
#
#    - incr: increments the current value of the flag.

#
#  - Else $script is eval'd to get its result value. That result
#    becomes the new flag value for $tgtArrayName(-flag). This
#    function intercepts [return $val] from eval'ing $script.  Any
#    empty script will result in the flag having "" assigned to it.
#
# Unless the -flag has a trailing asterisk, e.g. -flag*, this function
# assumes that each flag is unique, and using a flag more than once
# causes an error to be triggered. the -flag* forms works similarly
# except that may appear in $argv any number of times:
#
#  - For non-arg-consuming flags, each invocation of -flag causes the
#    result of $script to overwrite the previous value. e.g. so
#    {-flag* {x} {incr foo}} has a default value of x, but passing in
#    -flag twice would change it to the result of incrementing foo
#    twice. This form can be used to implement, e.g., increasing
#    verbosity levels by passing -verbose multiple times.
#
#  - For arg-consuming flags, the given flag starts with value X, but
#    if the flag is provided in $argv, the default is cleared, then
#    each instance of -flag causes its value to be appended to the
#    result, so {-flag* => {a b c}} defaults to {a b c}, but passing
#    in -flag y -flag z would change it to {y z}, not {a b c y z}..
#
# By default, the args list is only inspected until the first argument
# which is not described by $prototype. i.e. the first "non-flag" (not
# counting values consumed for flags defined like -flag => default).
# The :all-flags pragma (see below) can modify this behavior.
#
# If a "--" flag is encountered, no more arguments are inspected as
# flags unless the :all-flags pragma (see below) is in effect. The
# first instance of "--" is removed from the target result list but
# all remaining instances of "--" are are passed through.
#



# Any argvName entries not described in $prototype are considered to
# be "non-flags" for purposes of this function, even if they
# ostensibly look like flags.
#
# Returns the number of flags it processed in $argvName, not counting
# "--".
#
# Example:
#
## set args [list -foo -bar {blah} -z 8 9 10 -theEnd]
## proj-parse-flags args flags {
##   -foo    0  {expr 1}
##   -bar    => 0
##   -no-baz 1  {return 0}
##   -z 0 2
## }
#
# After that $flags would contain {-foo 1 -bar {blah} -no-baz 1 -z 2}
# and $args would be {8 9 10 -theEnd}.
#
# Pragmas:
#
# Passing :PRAGMAS to this function may modify how it works. The
# following pragmas are supported (note the leading ":"):
#
#   :all-flags indicates that the whole input list should be scanned,

#   not stopping at the first non-flag or "--".
#
proc proj-parse-flags {argvName tgtArrayName prototype} {
  upvar $argvName argv
  upvar $tgtArrayName outFlags
  array set flags {}; # staging area
  array set blob {}; # holds markers for various per-key state and options
  set incrSkip 1; # 1 if we stop at the first non-flag, else 0
  # Parse $prototype for flag definitions...
  set n [llength $prototype]
  set checkProtoFlag {
    #puts "**** checkProtoFlag #$i of $n k=$k fv=$fv"
    switch -exact -- $fv {
      -literal {
        proj-assert {![info exists blob(${k}.consumes)]}
        set blob(${k}.script) [list expr [lindex $prototype [incr i]]]
      }
      -apply {
        set fv [lindex $prototype [incr i]]
        if {2 == [llength $fv]} {
          # Treat this as a lambda literal
          set fv [list $fv]
        }
        lappend blob(${k}.call) "apply $fv"
      }
      -call {
        # arg is either a proc name or {apply $aLambda}
        set fv [lindex $prototype [incr i]]
        lappend blob(${k}.call) $fv
      }
      default {
        proj-assert {![info exists blob(${k}.consumes)]}
        set blob(${k}.script) $fv
      }
    }
    if {$i >= $n} {
      proj-error -up "[proj-scope]: Missing argument for $k flag"
    }
  }
  for {set i 0} {$i < $n} {incr i} {
    set k [lindex $prototype $i]
    #puts "**** #$i of $n k=$k"

    # Check for :PRAGMA...
    switch -exact -- $k {
      :all-flags {
        set incrSkip 0
        continue
      }
    }

    proj-assert {[string match -* $k]} \
      "Invalid argument: $k"

    if {[string match {*\*} $k]} {
      # Re-map -foo* to -foo and flag -foo as a repeatable flag
      set k [string map {* ""} $k]
      incr blob(${k}.multi)
    }

    if {[info exists flags($k)]} {
      proj-error -up "[proj-scope]: Duplicated prototype for flag $k"
    }

    switch -exact -- [lindex $prototype [expr {$i + 1}]] {
      => {
        # -flag => DFLT ?-subflag arg?
        incr i 2
        if {$i >= $n} {
          proj-error -up "[proj-scope]: Missing argument for $k => flag"
        }
        incr blob(${k}.consumes)
        set vi [lindex $prototype $i]
        if {$vi in {-apply -call}} {
          proj-error -up "[proj-scope]: Missing default value for $k flag"
        } else {
          set fv [lindex $prototype [expr {$i + 1}]]
          if {$fv in {-apply -call}} {
            incr i
            eval $checkProtoFlag
          }
        }
      }
      default {
        # -flag VALUE ?flag? SCRIPT
        set vi [lindex $prototype [incr i]]
        set fv [lindex $prototype [incr i]]
        eval $checkProtoFlag
      }
    }
    #puts "**** #$i of $n k=$k vi=$vi"
    set flags($k) $vi
  }
  #puts "-- flags"; parray flags
  #puts "-- blob"; parray blob

  set rc 0
  set rv {}; # staging area for the target argv value
  set skipMode 0
  set n [llength $argv]
  # Now look for those flags in $argv...
  for {set i 0} {$i < $n} {incr i} {
    set arg [lindex $argv $i]
    #puts "-- [proj-scope] arg=$arg"
    if {$skipMode} {
      lappend rv $arg
    } elseif {"--" eq $arg} {
      # "--" is the conventional way to end processing of args
      if {[incr blob(--)] > 1} {
        # Elide only the first one
        lappend rv $arg
      }
      incr skipMode $incrSkip
    } elseif {[info exists flags($arg)]} {
      # A known flag...
      set isMulti [info exists blob(${arg}.multi)]
      incr blob(${arg}.seen)
      if {1 < $blob(${arg}.seen) && !$isMulti} {
        proj-error -up [proj-scope] "$arg flag was used multiple times"
      }
      set vMode 0; # 0=as-is, 1=eval, 2=call
      set isConsuming [info exists blob(${arg}.consumes)]
      if {$isConsuming} {
        incr i
        if {$i >= $n} {

          proj-error -up [proj-scope] "is missing argument for $arg flag"
        }
        set vv [lindex $argv $i]
      } elseif {[info exists blob(${arg}.script)]} {
        set vMode 1
        set vv $blob(${arg}.script)
      } else {
        set vv $flags($arg)
      }

      if {[info exists blob(${arg}.call)]} {
        set vMode 2
        set vv [concat {*}$blob(${arg}.call) $arg $vv]
      } elseif {$isConsuming} {
        proj-assert {!$vMode}
        # fall through
      } elseif {"" eq $vv || [string is double -strict $vv]} {
        set vMode 0
      } elseif {$vv in {incr}} {
        set vMode 0
        switch -exact $vv {
          incr {
            set xx $flags($k); incr xx; set vv $xx; unset xx
          }
          default {
            proj-error "Unhandled \$vv value $vv"
          }
        }
      } else {
        set vv [list eval $vv]
        set vMode 1
      }
      if {$vMode} {
        set code [catch [list uplevel 1 $vv] vv xopt]
        if {$code ni {0 2}} {
          return {*}$xopt $vv
        }
      }
      if {$isConsuming && $isMulti} {
        if {1 == $blob(${arg}.seen)} {
          # On the first hit, overwrite the default with a new list.
          set flags($arg) [list $vv]
        } else {
          # On subsequent hits, append to the list.
          lappend flags($arg) $vv
        }
      } else {
        set flags($arg) $vv
      }
      incr rc
    } else {
      # Non-flag
      incr skipMode $incrSkip
      lappend rv $arg
    }
  }
  set argv $rv
  array set outFlags [array get flags]
  #puts "-- rv=$rv argv=$argv flags="; parray flags
  return $rc
}; # proj-parse-flags

#
# Older (deprecated) name of proj-parse-flags.
#
proc proj-parse-simple-flags {args} {
  tailcall proj-parse-flags {*}$args
}

if {$::proj__Config(self-tests)} {
  set __ova $::proj__Config(verbose-assert);
  set ::proj__Config(verbose-assert) 1
  puts "Running [info script] self-tests..."
  # proj-cache...
  apply {{} {
    #proj-warn "Test code for proj-cache"
    proj-assert {![proj-cache-check -key here check]}
    proj-assert {"here" eq [proj-cache-key here]}
    proj-assert {"" eq $check}
    proj-cache-set -key here thevalue
    proj-assert {[proj-cache-check -key here check]}

    #parray ::proj__Cache;
    proj-assert {"" ne [proj-cache-remove]}
    proj-assert {![proj-cache-check check]}
    proj-assert {"" eq [proj-cache-remove]}
    proj-assert {"" eq $check}
  }}

  # proj-parse-flags ...
  apply {{} {
    set foo 3
    set argv {-a "hi - world" -b -b -b -- -a {bye bye} -- -d -D c -a "" --}
    proj-parse-flags argv flags {
      :all-flags
      -a* => "gets overwritten"
      -b* 7 {incr foo}
      -d 1 0
      -D 0 1
    }

    #puts "-- argv = $argv"; parray flags;
    proj-assert {"-- c --" eq $argv}
    proj-assert {$flags(-a) eq "{hi - world} {bye bye} {}"}
    proj-assert {$foo == 6}
    proj-assert {$flags(-b) eq $foo}
    proj-assert {$flags(-d) == 0}
    proj-assert {$flags(-D) == 1}
    set foo 0
    foreach x $flags(-a) {
      proj-assert {$x in {{hi - world} {bye bye} {}}}
      incr foo
    }
    proj-assert {3 == $foo}

    set argv {-a {hi world} -b -maybe -- -a {bye bye} -- -b c --}
    set foo 0
    proj-parse-flags argv flags {
      -a => "aaa"
      -b 0 {incr foo}
      -maybe no -literal yes
    }
    #parray flags; puts "--- argv = $argv"
    proj-assert {"-a {bye bye} -- -b c --" eq $argv}
    proj-assert {$flags(-a) eq "hi world"}
    proj-assert {1 == $flags(-b)}
    proj-assert {"yes" eq $flags(-maybe)}

    set argv {-f -g -a aaa -M -M -M -L -H -A AAA a b c}
    set foo 0
    set myLambda {{flag val} {
      proj-assert {$flag in {-f -g -M}}
      #puts "myLambda flag=$flag val=$val"
      incr val
    }}
    proc myNonLambda {flag val} {
      proj-assert {$flag in {-A -a}}
      #puts "myNonLambda flag=$flag val=$val"
      concat $val $val
    }
    proj-parse-flags argv flags {
      -f 0 -call {apply $myLambda}
      -g 2 -apply $myLambda
      -h 3 -apply $myLambda
      -H 30 33
      -a => aAAAa -apply {{f v} {
        set v
      }}
      -A => AaaaA -call myNonLambda
      -B => 17 -call myNonLambda
      -M* 0 -apply $myLambda
      -L "" -literal $myLambda
    }
    rename myNonLambda ""
    #puts "--- argv = $argv"; parray flags
    proj-assert {$flags(-f) == 1}
    proj-assert {$flags(-g) == 3}
    proj-assert {$flags(-h) == 3}
    proj-assert {$flags(-H) == 33}
    proj-assert {$flags(-a) == {aaa}}
    proj-assert {$flags(-A) eq "AAA AAA"}
    proj-assert {$flags(-B) == 17}
    proj-assert {$flags(-M) == 3}
    proj-assert {$flags(-L) eq $myLambda}

    set argv {-touch -validate}
    proj-parse-flags argv flags {
      -touch "" {return "-touch"}
      -validate 0 1
    }
    #puts "----- argv = $argv"; parray flags
    proj-assert {$flags(-touch) eq "-touch"}
    proj-assert {$flags(-validate) == 1}
    proj-assert {$argv eq {}}

    set argv {-i -i -i}
    proj-parse-flags argv flags {
      -i* 0 incr
    }
    proj-assert {3 == $flags(-i)}
  }}
  set ::proj__Config(verbose-assert) $__ova
  unset __ova
  puts "Done running [info script] self-tests."
}; # proj- API self-tests

        rtree                => {Enable the RTREE extension}
        session              => {Enable the SESSION extension}
        all=$::sqliteConfig(all-flag-default) => {$allFlagHelp}
        largefile=1
          => {This legacy flag has no effect on the library but may influence
              the generated sqlite_cfg.h by adding #define HAVE_LFS}
      }
      {canonical} {
        column-metadata      => {Enable the column metadata APIs}
        # ^^^ Affects how sqlite3.c is generated, so is not available in
        # the autoconf build.
      }
    }

    # Options for TCL support
    tcl {
      {canonical} {
        tcl=1
          => {Disable components which require TCL, including all tests.
              This tree requires TCL for code generation but can use the in-tree
              copy of autosetup/jimsh0.c for that. The SQLite TCL extension and the
              test code require a canonical tclsh.}


        with-tcl:DIR
          => {Directory containing tclConfig.sh or a directory one level up from
              that, from which we can derive a directory containing tclConfig.sh.
              A dir name of "prefix" is equivalent to the directory specified by
              the --prefix flag.}
        with-tclsh:PATH
          => {Full pathname of tclsh to use.  It is used for (A) trying to find
              tclConfig.sh and (B) all TCL-based code generation. Use --with-tcl
              unless you have a specific need for this flag. Warning: if its
              containing dir has multiple tclsh versions, it may select the
              wrong tclConfig.sh!}


        static-tclsqlite3=0
          => {Statically-link tclsqlite3. This only works if TCL support is
              enabled and all requisite libraries are available in
              static form. Note that glibc is unable to fully statically
              link certain libraries required by tclsqlite3, so this won't
              work on most Linux environments.}
      }

        # --disable-static-shell: https://sqlite.org/forum/forumpost/cc219ee704
        # Note that this has a different meaning from --static-cli-shell in the
        # canonical build!
        static-shell=1
          => {Link the sqlite3 shell app against the DLL instead of embedding sqlite3.c}
      }
      {canonical autoconf} {

        rpath=1 => {Disable use of the rpath linker flag}

        # soname: https://sqlite.org/src/forumpost/5a3b44f510df8ded
        soname:=legacy
          => {SONAME for libsqlite3.so. "none", or not using this flag, sets no
              soname. "legacy" sets it to its historical value of
              libsqlite3.so.0.  A value matching the glob "libsqlite3.*" sets
              it to that literal value. Any other value is assumed to be a
              suffix which gets applied to "libsqlite3.so.",

      if {[opt-bool memsys5]} {
        proj-warn "not enabling memsys3 because memsys5 is enabled."
        expr 0
      } else {
        sqlite-add-feature-flag -DSQLITE_ENABLE_MEMSYS3
      }
    }
    scanstatus      -DSQLITE_ENABLE_STMT_SCANSTATUS {}
    column-metadata -DSQLITE_ENABLE_COLUMN_METADATA {}
  }] {
    if {$boolFlag ni $::autosetup(options)} {
      # Skip flags which are in the canonical build but not
      # the autoconf bundle.
      continue
    }
    proj-if-opt-truthy $boolFlag {

    # 2024-10-28: calculation of TCLLIBDIR is now done via the shell
    # in main.mk (search it for T.tcl.env.sh) so that
    # static/hand-written makefiles which import main.mk do not have
    # to define that before importing main.mk. Even so, we export
    # TCLLIBDIR from here, which will cause the canonical makefile to
    # use this one rather than to re-calculate it at make-time.
    set tcllibdir [get-env TCLLIBDIR ""]
    set sq3Ver [get-define PACKAGE_VERSION]
    if {"" eq $tcllibdir} {
      # Attempt to extract TCLLIBDIR from TCL's $auto_path
      if {"" ne $with_tclsh &&
          [catch {exec echo "puts stdout \$auto_path" | "$with_tclsh"} result] == 0} {
        foreach i $result {
          if {[file isdir $i]} {
            set tcllibdir $i/sqlite${sq3Ver}
            break
          }
        }
      } else {
        proj-warn "Cannot determine TCLLIBDIR."
        # The makefile will fail fatally in this case if a target is
        # invoked which requires TCLLIBDIR.

}; # sqlite-determine-codegen-tcl

########################################################################
# Runs sqlite-check-tcl and, if this is the canonical build,
# sqlite-determine-codegen-tcl.
proc sqlite-handle-tcl {} {
  sqlite-check-tcl
  if {"canonical" ne $::sqliteConfig(build-mode)} return
  msg-result "TCL for code generation: [sqlite-determine-codegen-tcl]"

  # Determine the base name of the Tcl extension's DLL
  #
  if {[get-define HAVE_TCL]} {
    if {[string match *-cygwin [get-define host]]} {
      set libname cyg
    } else {
      set libname lib
    }
    if {[get-define TCL_MAJOR_VERSION] > 8} {
      append libname tcl9
    }
    append libname sqlite
  } else {
    set libname ""
  }
  define TCL_EXT_DLL_BASENAME $libname
  # The extension is added in the makefile
}

########################################################################
# Handle the --enable/disable-rpath flag.
proc sqlite-handle-rpath {} {

  # autosetup/cc-shared.tcl sets the rpath flag definition in
  # [get-define SH_LINKRPATH], but it does so on a per-platform basis
  # rather than as a compiler check. Though we should do a proper
  # compiler check (as proj-check-rpath does), we may want to consider
  # adopting its approach of clearing the rpath flags for environments
  # for which sqlite-env-is-unix-on-windows returns a non-empty
  # string.

  # https://sqlite.org/forum/forumpost/13cac3b56516f849
  if {[proj-opt-truthy rpath]} {
    proj-check-rpath
  } else {
    msg-result "Disabling use of rpath."
    define LDFLAGS_RPATH ""

  }
}

########################################################################
# If the --dump-defines configure flag is provided then emit a list of
# all [define] values to config.defines.txt, else do nothing.
proc sqlite-dump-defines {} {
  proj-if-opt-truthy dump-defines {

#define deliberate_fall_through

/*
** Macros needed to provide flexible arrays in a portable way
*/
#ifndef offsetof
# define offsetof(ST,M) ((size_t)((char*)&((ST*)0)->M - (char*)0))
#endif
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
# define FLEXARRAY
#else
# define FLEXARRAY 1
#endif

#include "fts5.h"
#include "sqlite3ext.h"
SQLITE_EXTENSION_INIT1

#include <string.h>
#include <assert.h>
#include <stddef.h>

#ifndef SQLITE_AMALGAMATION

typedef unsigned char  u8;
typedef unsigned int   u32;
typedef unsigned short u16;
typedef short i16;

# define EIGHT_BYTE_ALIGNMENT(X)   ((((uptr)(X) - (uptr)0)&7)==0)
#endif

/*
** Macros needed to provide flexible arrays in a portable way
*/
#ifndef offsetof
# define offsetof(ST,M) ((size_t)((char*)&((ST*)0)->M - (char*)0))
#endif
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
# define FLEXARRAY
#else
# define FLEXARRAY 1
#endif

  /* Variables populated based on current entry. */
  Fts5Buffer term;                /* Current term */
  i64 iRowid;                     /* Current rowid */
  int nPos;                       /* Number of bytes in current position list */
  u8 bDel;                        /* True if the delete flag is set */
};

static int fts5IndexCorruptRowid(Fts5Index *pIdx, i64 iRowid){
  pIdx->rc = FTS5_CORRUPT;
  sqlite3Fts5ConfigErrmsg(pIdx->pConfig, 
      "fts5: corruption found reading blob %lld from table \"%s\"", 
      iRowid, pIdx->pConfig->zName
  );
  return SQLITE_CORRUPT_VTAB;
}
#define FTS5_CORRUPT_ROWID(pIdx, iRowid) fts5IndexCorruptRowid(pIdx, iRowid)

static int fts5IndexCorruptIter(Fts5Index *pIdx, Fts5SegIter *pIter){
  pIdx->rc = FTS5_CORRUPT;
  sqlite3Fts5ConfigErrmsg(pIdx->pConfig, 
      "fts5: corruption on page %d, segment %d, table \"%s\"", 
      pIter->iLeafPgno, pIter->pSeg->iSegid, pIdx->pConfig->zName
  );
  return SQLITE_CORRUPT_VTAB;
}
#define FTS5_CORRUPT_ITER(pIdx, pIter) fts5IndexCorruptIter(pIdx, pIter)

static int fts5IndexCorruptIdx(Fts5Index *pIdx){
  pIdx->rc = FTS5_CORRUPT;
  sqlite3Fts5ConfigErrmsg(pIdx->pConfig, 
      "fts5: corruption in table \"%s\"", pIdx->pConfig->zName
  );
  return SQLITE_CORRUPT_VTAB;
}
#define FTS5_CORRUPT_IDX(pIdx) fts5IndexCorruptIdx(pIdx)


/*
** Array of tombstone pages. Reference counted.
*/
struct Fts5TombstoneArray {
  int nRef;                         /* Number of pointers to this object */
  int nTombstone;

    }

    /* If either of the sqlite3_blob_open() or sqlite3_blob_reopen() calls
    ** above returned SQLITE_ERROR, return SQLITE_CORRUPT_VTAB instead.
    ** All the reasons those functions might return SQLITE_ERROR - missing
    ** table, missing row, non-blob/text in block column - indicate 
    ** backing store corruption.  */
    if( rc==SQLITE_ERROR ) rc = FTS5_CORRUPT_ROWID(p, iRowid);

    if( rc==SQLITE_OK ){
      u8 *aOut = 0;               /* Read blob data into this buffer */
      int nByte = sqlite3_blob_bytes(p->pReader);
      int szData = (sizeof(Fts5Data) + 7) & ~7;
      sqlite3_int64 nAlloc = szData + nByte + FTS5_DATA_PADDING;
      pRet = (Fts5Data*)sqlite3_malloc64(nAlloc);

  sqlite3_free(pData);
}

static Fts5Data *fts5LeafRead(Fts5Index *p, i64 iRowid){
  Fts5Data *pRet = fts5DataRead(p, iRowid);
  if( pRet ){
    if( pRet->nn<4 || pRet->szLeaf>pRet->nn ){
      FTS5_CORRUPT_ROWID(p, iRowid);
      fts5DataRelease(pRet);
      pRet = 0;
    }
  }
  return pRet;
}

  Fts5Data *pData;

  pData = fts5DataRead(p, FTS5_STRUCTURE_ROWID);
  if( p->rc==SQLITE_OK ){
    /* TODO: Do we need this if the leaf-index is appended? Probably... */
    memset(&pData->p[pData->nn], 0, FTS5_DATA_PADDING);
    p->rc = fts5StructureDecode(pData->p, pData->nn, &iCookie, &pRet);
    if( p->rc==SQLITE_OK ){
      if( (pConfig->pgsz==0 || pConfig->iCookie!=iCookie) ){
        p->rc = sqlite3Fts5ConfigLoad(pConfig, iCookie);
      }
    }else if( p->rc==SQLITE_CORRUPT_VTAB ){
      sqlite3Fts5ConfigErrmsg(p->pConfig, 
          "fts5: corrupt structure record for table \"%s\"", p->pConfig->zName
      );
    }
    fts5DataRelease(pData);
    if( p->rc!=SQLITE_OK ){
      fts5StructureRelease(pRet);
      pRet = 0;
    }
  }

  u8 *a = pIter->pLeaf->p;        /* Buffer to read data from */
  i64 iOff = pIter->iLeafOffset;

  ASSERT_SZLEAF_OK(pIter->pLeaf);
  while( iOff>=pIter->pLeaf->szLeaf ){
    fts5SegIterNextPage(p, pIter);
    if( pIter->pLeaf==0 ){
      if( p->rc==SQLITE_OK ) FTS5_CORRUPT_ITER(p, pIter);
      return;
    }
    iOff = 4;
    a = pIter->pLeaf->p;
  }
  iOff += sqlite3Fts5GetVarint(&a[iOff], (u64*)&pIter->iRowid);
  pIter->iLeafOffset = iOff;

static void fts5SegIterLoadTerm(Fts5Index *p, Fts5SegIter *pIter, int nKeep){
  u8 *a = pIter->pLeaf->p;        /* Buffer to read data from */
  i64 iOff = pIter->iLeafOffset;  /* Offset to read at */
  int nNew;                       /* Bytes of new data */

  iOff += fts5GetVarint32(&a[iOff], nNew);
  if( iOff+nNew>pIter->pLeaf->szLeaf || nKeep>pIter->term.n || nNew==0 ){
    FTS5_CORRUPT_ITER(p, pIter);
    return;
  }
  pIter->term.n = nKeep;
  fts5BufferAppendBlob(&p->rc, &pIter->term, nNew, &a[iOff]);
  assert( pIter->term.n<=pIter->term.nSpace );
  iOff += nNew;
  pIter->iTermLeafOffset = iOff;

          pIter->iLeafOffset = pIter->iTermLeafOffset;
        }
      }else{
        int iRowidOff;
        iRowidOff = fts5LeafFirstRowidOff(pNew);
        if( iRowidOff ){
          if( iRowidOff>=pNew->szLeaf ){
            FTS5_CORRUPT_ITER(p, pIter);
          }else{
            pIter->pLeaf = pNew;
            pIter->iLeafOffset = iRowidOff;
          }
        }
      }

        );
        pIter->iLeafOffset = iOff;
        pIter->iEndofDoclist = iOff;
        bNewTerm = 1;
      }
      assert_nc( iOff<pLeaf->szLeaf );
      if( iOff>pLeaf->szLeaf ){
        FTS5_CORRUPT_ITER(p, pIter);
        return;
      }
    }
  }

  /* Check if the iterator is now at EOF. If so, return early. */
  if( pIter->pLeaf ){

  if( pLast ){
    int iOff;
    fts5DataRelease(pIter->pLeaf);
    pIter->pLeaf = pLast;
    pIter->iLeafPgno = pgnoLast;
    iOff = fts5LeafFirstRowidOff(pLast);
    if( iOff>pLast->szLeaf ){
      FTS5_CORRUPT_ITER(p, pIter);
      return;
    }
    iOff += fts5GetVarint(&pLast->p[iOff], (u64*)&pIter->iRowid);
    pIter->iLeafOffset = iOff;

    if( fts5LeafIsTermless(pLast) ){
      pIter->iEndofDoclist = pLast->nn+1;

  assert( p->rc==SQLITE_OK );

  iPgidx = (u32)pIter->pLeaf->szLeaf;
  iPgidx += fts5GetVarint32(&a[iPgidx], iTermOff);
  iOff = iTermOff;
  if( iOff>n ){
    FTS5_CORRUPT_ITER(p, pIter);
    return;
  }

  while( 1 ){

    /* Figure out how many new bytes are in this term */
    fts5FastGetVarint32(a, iOff, nNew);

    }

    iPgidx += fts5GetVarint32(&a[iPgidx], nKeep);
    iTermOff += nKeep;
    iOff = iTermOff;

    if( iOff>=n ){
      FTS5_CORRUPT_ITER(p, pIter);
      return;
    }

    /* Read the nKeep field of the next term. */
    fts5FastGetVarint32(a, iOff, nKeep);
  }

      fts5SegIterNextPage(p, pIter);
      if( pIter->pLeaf==0 ) return;
      a = pIter->pLeaf->p;
      if( fts5LeafIsTermless(pIter->pLeaf)==0 ){
        iPgidx = (u32)pIter->pLeaf->szLeaf;
        iPgidx += fts5GetVarint32(&pIter->pLeaf->p[iPgidx], iOff);
        if( iOff<4 || (i64)iOff>=pIter->pLeaf->szLeaf ){
          FTS5_CORRUPT_ITER(p, pIter);
          return;
        }else{
          nKeep = 0;
          iTermOff = iOff;
          n = (u32)pIter->pLeaf->nn;
          iOff += fts5GetVarint32(&a[iOff], nNew);
          break;
        }
      }
    }while( 1 );
  }

 search_success:
  if( (i64)iOff+nNew>n || nNew<1 ){
    FTS5_CORRUPT_ITER(p, pIter);
    return;
  }
  pIter->iLeafOffset = iOff + nNew;
  pIter->iTermLeafOffset = pIter->iLeafOffset;
  pIter->iTermLeafPgno = pIter->iLeafPgno;

  fts5BufferSet(&p->rc, &pIter->term, nKeep, pTerm);

  Fts5Index *p,                   /* FTS5 backend object */
  Fts5SegIter *pIter,             /* Iterator to advance */
  int iLeafPgno
){
  assert( iLeafPgno>pIter->iLeafPgno );

  if( iLeafPgno>pIter->pSeg->pgnoLast ){
    FTS5_CORRUPT_IDX(p);
  }else{
    fts5DataRelease(pIter->pNextLeaf);
    pIter->pNextLeaf = 0;
    pIter->iLeafPgno = iLeafPgno-1;

    while( p->rc==SQLITE_OK ){
      int iOff;
      fts5SegIterNextPage(p, pIter);
      if( pIter->pLeaf==0 ) break;
      iOff = fts5LeafFirstRowidOff(pIter->pLeaf);
      if( iOff>0 ){
        u8 *a = pIter->pLeaf->p;
        int n = pIter->pLeaf->szLeaf;
        if( iOff<4 || iOff>=n ){
          FTS5_CORRUPT_IDX(p);
        }else{
          iOff += fts5GetVarint(&a[iOff], (u64*)&pIter->iRowid);
          pIter->iLeafOffset = iOff;
          fts5SegIterLoadNPos(p, pIter);
        }
        break;
      }

  while( 1 ){
    xChunk(p, pCtx, pChunk, nChunk);
    nRem -= nChunk;
    fts5DataRelease(pData);
    if( nRem<=0 ){
      break;
    }else if( pSeg->pSeg==0 ){
      FTS5_CORRUPT_IDX(p);
      return;
    }else{
      pgno++;
      pData = fts5LeafRead(p, FTS5_SEGMENT_ROWID(pSeg->pSeg->iSegid, pgno));
      if( pData==0 ) break;
      pChunk = &pData->p[4];
      nChunk = MIN(nRem, pData->szLeaf - 4);

      pData = fts5LeafRead(p, iLeafRowid);
      if( pData ){
        if( iOff>pData->szLeaf ){
          /* This can occur if the pages that the segments occupy overlap - if
          ** a single page has been assigned to more than one segment. In
          ** this case a prior iteration of this loop may have corrupted the
          ** segment currently being trimmed.  */
          FTS5_CORRUPT_ROWID(p, iLeafRowid);
        }else{
          fts5BufferZero(&buf);
          fts5BufferGrow(&p->rc, &buf, pData->nn);
          fts5BufferAppendBlob(&p->rc, &buf, sizeof(aHdr), aHdr);
          fts5BufferAppendVarint(&p->rc, &buf, pSeg->term.n);
          fts5BufferAppendBlob(&p->rc, &buf, pSeg->term.n, pSeg->term.p);
          fts5BufferAppendBlob(&p->rc, &buf,pData->szLeaf-iOff,&pData->p[iOff]);

      assert_nc( bDetailNone==0 || pLeaf->nn==4 );
      if( bDetailNone==0 ) fts5DataWrite(p, iRowid, aEmpty, sizeof(aEmpty));
      fts5DataRelease(pLeaf);
      pLeaf = 0;
    }else if( bDetailNone ){
      break;
    }else if( iNext>=pLeaf->szLeaf || pLeaf->nn<pLeaf->szLeaf || iNext<4 ){
      FTS5_CORRUPT_ROWID(p, iRowid);
      break;
    }else{
      int nShift = iNext - 4;
      int nPg;

      int nIdx = 0;
      u8 *aIdx = 0;

      /* Unless the current page footer is 0 bytes in size (in which case
      ** the new page footer will be as well), allocate and populate a 
      ** buffer containing the new page footer. Set stack variables aIdx 
      ** and nIdx accordingly.  */
      if( pLeaf->nn>pLeaf->szLeaf ){
        int iFirst = 0;
        int i1 = pLeaf->szLeaf;
        int i2 = 0;

        i1 += fts5GetVarint32(&aPg[i1], iFirst);
        if( iFirst<iNext ){
          FTS5_CORRUPT_ROWID(p, iRowid);
          break;
        }
        aIdx = sqlite3Fts5MallocZero(&p->rc, (pLeaf->nn-pLeaf->szLeaf)+2);
        if( aIdx==0 ) break;
        i2 = sqlite3Fts5PutVarint(aIdx, iFirst-nShift);
        if( i1<pLeaf->nn ){
          memcpy(&aIdx[i2], &aPg[i1], pLeaf->nn-i1);

      }
      iKeyOff += fts5GetVarint32(&aPg[iKeyOff], nSuffix);

      nPrefix = MIN(nPrefix, nPrefix2);
      nSuffix = (nPrefix2 + nSuffix2) - nPrefix;

      if( (iKeyOff+nSuffix)>iPgIdx || (iNextOff+nSuffix2)>iPgIdx ){
        FTS5_CORRUPT_IDX(p);
      }else{
        if( iKey!=1 ){
          iOff += sqlite3Fts5PutVarint(&aPg[iOff], nPrefix);
        }
        iOff += sqlite3Fts5PutVarint(&aPg[iOff], nSuffix);
        if( nPrefix2>pSeg->term.n ){
          FTS5_CORRUPT_IDX(p);
        }else if( nPrefix2>nPrefix ){
          memcpy(&aPg[iOff], &pSeg->term.p[nPrefix], nPrefix2-nPrefix);
          iOff += (nPrefix2-nPrefix);
        }
        memmove(&aPg[iOff], &aPg[iNextOff], nSuffix2);
        iOff += nSuffix2;
        iNextOff += nSuffix2;

        nTmp += pSave->iter.nPoslist + 10;
        nMerge++;
        fts5PrefixMergerInsertByPosition(&pHead, pSave);
        pSave = pNext;
      }

      if( pHead==0 || pHead->pNext==0 ){
        FTS5_CORRUPT_IDX(p);
        break;
      }

      /* See the earlier comment in this function for an explanation of why
      ** corrupt input position lists might cause the output to consume
      ** at most nMerge*10 bytes of unexpected space. */
      if( sqlite3Fts5BufferSize(&p->rc, &tmp, nTmp+nMerge*10) ){

      }
      nTail = pHead->iter.nPoslist - pHead->iOff;

      /* WRITEPOSLISTSIZE */
      assert_nc( tmp.n+nTail<=nTmp );
      assert( tmp.n+nTail<=nTmp+nMerge*10 );
      if( tmp.n+nTail>nTmp-FTS5_DATA_ZERO_PADDING ){
        if( p->rc==SQLITE_OK ) FTS5_CORRUPT_IDX(p);
        break;
      }
      fts5BufferSafeAppendVarint(&out, (tmp.n+nTail) * 2);
      fts5BufferSafeAppendBlob(&out, tmp.p, tmp.n);
      if( nTail>0 ){
        fts5BufferSafeAppendBlob(&out, &pHead->aPos[pHead->iOff], nTail);
      }

  int i;

  /* Now check that the iter.nEmpty leaves following the current leaf
  ** (a) exist and (b) contain no terms. */
  for(i=iFirst; p->rc==SQLITE_OK && i<=iLast; i++){
    Fts5Data *pLeaf = fts5DataRead(p, FTS5_SEGMENT_ROWID(pSeg->iSegid, i));
    if( pLeaf ){
      if( !fts5LeafIsTermless(pLeaf)
       || (i>=iNoRowid && 0!=fts5LeafFirstRowidOff(pLeaf))
      ){
        FTS5_CORRUPT_ROWID(p, FTS5_SEGMENT_ROWID(pSeg->iSegid, i));
      }
    }
    fts5DataRelease(pLeaf);
  }
}

static void fts5IntegrityCheckPgidx(Fts5Index *p, i64 iRowid, Fts5Data *pLeaf){
  i64 iTermOff = 0;
  int ii;

  Fts5Buffer buf1 = {0,0,0};
  Fts5Buffer buf2 = {0,0,0};

  ii = pLeaf->szLeaf;
  while( ii<pLeaf->nn && p->rc==SQLITE_OK ){
    int res;
    i64 iOff;
    int nIncr;

    ii += fts5GetVarint32(&pLeaf->p[ii], nIncr);
    iTermOff += nIncr;
    iOff = iTermOff;

    if( iOff>=pLeaf->szLeaf ){
      FTS5_CORRUPT_ROWID(p, iRowid);
    }else if( iTermOff==nIncr ){
      int nByte;
      iOff += fts5GetVarint32(&pLeaf->p[iOff], nByte);
      if( (iOff+nByte)>pLeaf->szLeaf ){
        FTS5_CORRUPT_ROWID(p, iRowid);
      }else{
        fts5BufferSet(&p->rc, &buf1, nByte, &pLeaf->p[iOff]);
      }
    }else{
      int nKeep, nByte;
      iOff += fts5GetVarint32(&pLeaf->p[iOff], nKeep);
      iOff += fts5GetVarint32(&pLeaf->p[iOff], nByte);
      if( nKeep>buf1.n || (iOff+nByte)>pLeaf->szLeaf ){
        FTS5_CORRUPT_ROWID(p, iRowid);
      }else{
        buf1.n = nKeep;
        fts5BufferAppendBlob(&p->rc, &buf1, nByte, &pLeaf->p[iOff]);
      }

      if( p->rc==SQLITE_OK ){
        res = fts5BufferCompare(&buf1, &buf2);
        if( res<=0 ) FTS5_CORRUPT_ROWID(p, iRowid);
      }
    }
    fts5BufferSet(&p->rc, &buf2, buf1.n, buf1.p);
  }

  fts5BufferFree(&buf1);
  fts5BufferFree(&buf2);

       && pLeaf->nn==pLeaf->szLeaf
       && pLeaf->nn==4
      ){
        /* special case - the very first page in a segment keeps its %_idx
        ** entry even if all the terms are removed from it by secure-delete 
        ** operations. */
      }else{
        FTS5_CORRUPT_ROWID(p, iRow);
      }

    }else{
      int iOff;                   /* Offset of first term on leaf */
      int iRowidOff;              /* Offset of first rowid on leaf */
      int nTerm;                  /* Size of term on leaf in bytes */
      int res;                    /* Comparison of term and split-key */

      iOff = fts5LeafFirstTermOff(pLeaf);
      iRowidOff = fts5LeafFirstRowidOff(pLeaf);
      if( iRowidOff>=iOff || iOff>=pLeaf->szLeaf ){
        FTS5_CORRUPT_ROWID(p, iRow);
      }else{
        iOff += fts5GetVarint32(&pLeaf->p[iOff], nTerm);
        res = fts5Memcmp(&pLeaf->p[iOff], zIdxTerm, MIN(nTerm, nIdxTerm));
        if( res==0 ) res = nTerm - nIdxTerm;
        if( res<0 ) FTS5_CORRUPT_ROWID(p, iRow);
      }

      fts5IntegrityCheckPgidx(p, iRow, pLeaf);
    }
    fts5DataRelease(pLeaf);
    if( p->rc ) break;

    /* Now check that the iter.nEmpty leaves following the current leaf
    ** (a) exist and (b) contain no terms. */
    fts5IndexIntegrityCheckEmpty(

      ){

        /* Check any rowid-less pages that occur before the current leaf. */
        for(iPg=iPrevLeaf+1; iPg<fts5DlidxIterPgno(pDlidx); iPg++){
          iKey = FTS5_SEGMENT_ROWID(iSegid, iPg);
          pLeaf = fts5DataRead(p, iKey);
          if( pLeaf ){
            if( fts5LeafFirstRowidOff(pLeaf)!=0 ) FTS5_CORRUPT_ROWID(p, iKey);
            fts5DataRelease(pLeaf);
          }
        }
        iPrevLeaf = fts5DlidxIterPgno(pDlidx);

        /* Check that the leaf page indicated by the iterator really does
        ** contain the rowid suggested by the same. */
        iKey = FTS5_SEGMENT_ROWID(iSegid, iPrevLeaf);
        pLeaf = fts5DataRead(p, iKey);
        if( pLeaf ){
          i64 iRowid;
          int iRowidOff = fts5LeafFirstRowidOff(pLeaf);
          ASSERT_SZLEAF_OK(pLeaf);
          if( iRowidOff>=pLeaf->szLeaf ){
            FTS5_CORRUPT_ROWID(p, iKey);
          }else if( bSecureDelete==0 || iRowidOff>0 ){
            i64 iDlRowid = fts5DlidxIterRowid(pDlidx);
            fts5GetVarint(&pLeaf->p[iRowidOff], (u64*)&iRowid);
            if( iRowid<iDlRowid || (bSecureDelete==0 && iRowid!=iDlRowid) ){
              FTS5_CORRUPT_ROWID(p, iKey);
            }
          }
          fts5DataRelease(pLeaf);
        }
      }

      iDlidxPrevLeaf = iPg;

        cksum2 ^= sqlite3Fts5IndexEntryCksum(iRowid, iCol, iTokOff, -1, z, n);
      }
    }
  }
  fts5TestTerm(p, &term, 0, 0, cksum2, &cksum3);

  fts5MultiIterFree(pIter);
  if( p->rc==SQLITE_OK && bUseCksum && cksum!=cksum2 ){
    p->rc = FTS5_CORRUPT;
    sqlite3Fts5ConfigErrmsg(p->pConfig, 
        "fts5: checksum mismatch for table \"%s\"", p->pConfig->zName
    );
  }

  fts5StructureRelease(pStruct);
#ifdef SQLITE_DEBUG
  fts5BufferFree(&term);
#endif
  fts5BufferFree(&poslist);
  return fts5IndexReturn(p);

          zSchema, zTabname);
      rc = (*pzErr) ? SQLITE_OK : SQLITE_NOMEM;
    }else{
      *pzErr = sqlite3_mprintf("unable to validate the inverted index for"
          " FTS5 table %s.%s: %s",
          zSchema, zTabname, sqlite3_errstr(rc));
    }
  }else if( (rc&0xff)==SQLITE_CORRUPT ){
    rc = SQLITE_OK;
  }
  sqlite3Fts5IndexCloseReader(pTab->p.pIndex);
  pTab->p.pConfig->pzErrmsg = 0;

  return rc;
}

static int fts5Init(sqlite3 *db){

  }

  ctx.pStorage = p;
  ctx.iCol = -1;
  for(iCol=1; rc==SQLITE_OK && iCol<=pConfig->nCol; iCol++){
    if( pConfig->abUnindexed[iCol-1]==0 ){
      sqlite3_value *pVal = 0;
      sqlite3_value *pFree = 0;
      const char *pText = 0;
      int nText = 0;
      const char *pLoc = 0;
      int nLoc = 0;

      assert( pSeek==0 || apVal==0 );
      assert( pSeek!=0 || apVal!=0 );
      if( pSeek ){
        pVal = sqlite3_column_value(pSeek, iCol);
      }else{
        pVal = apVal[iCol-1];
      }

      if( pConfig->bLocale && sqlite3Fts5IsLocaleValue(pConfig, pVal) ){
        rc = sqlite3Fts5DecodeLocaleValue(pVal, &pText, &nText, &pLoc, &nLoc);
      }else{
        if( sqlite3_value_type(pVal)!=SQLITE_TEXT ){
          /* Make a copy of the value to work with. This is because the call
          ** to sqlite3_value_text() below forces the type of the value to
          ** SQLITE_TEXT, and we may need to use it again later. */
          pFree = pVal = sqlite3_value_dup(pVal);
          if( pVal==0 ){
            rc = SQLITE_NOMEM;
          }
        }
        if( rc==SQLITE_OK ){
          pText = (const char*)sqlite3_value_text(pVal);
          nText = sqlite3_value_bytes(pVal);
          if( pConfig->bLocale && pSeek ){
            pLoc = (const char*)sqlite3_column_text(pSeek, iCol+pConfig->nCol);
            nLoc = sqlite3_column_bytes(pSeek, iCol + pConfig->nCol);
          }
        }
      }

      if( rc==SQLITE_OK ){
        sqlite3Fts5SetLocale(pConfig, pLoc, nLoc);
        ctx.szCol = 0;
        rc = sqlite3Fts5Tokenize(pConfig, FTS5_TOKENIZE_DOCUMENT, 
            pText, nText, (void*)&ctx, fts5StorageInsertCallback
        );
        p->aTotalSize[iCol-1] -= (i64)ctx.szCol;
        if( rc==SQLITE_OK && p->aTotalSize[iCol-1]<0 ){
          rc = FTS5_CORRUPT;
        }
        sqlite3Fts5ClearLocale(pConfig);
      }
      sqlite3_value_free(pFree);
    }
  }
  if( rc==SQLITE_OK && p->nTotalRow<1 ){
    rc = FTS5_CORRUPT;
  }else{
    p->nTotalRow--;
  }

}
sqlite3_db_config db DEFENSIVE 0
do_execsql_test 15.1 {
  UPDATE t1_content SET c1 = 'xyz xyz xyz xyz xyz abc' WHERE rowid = 1;
}
do_catchsql_test 15.2 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {1 {fts5: checksum mismatch for table "t1"}}

#-------------------------------------------------------------------------
#
do_execsql_test 16.1 {
  CREATE VIRTUAL TABLE n1 USING fts5(a);
  INSERT INTO n1 VALUES('a b c d');
}

sqlite3_db_config db DEFENSIVE 0
do_test 1.3 {
  execsql {
    DELETE FROM t1_data WHERE rowid = fts5_rowid('segment', $segid, 4);
  }
  catchsql { INSERT INTO t1(t1) VALUES('integrity-check') }
} {1 {fts5: corruption found reading blob 137438953476 from table "t1"}}
do_execsql_test 1.3b {
  PRAGMA integrity_check(t1);

} {{fts5: corruption found reading blob 137438953476 from table "t1"}}

do_test 1.4 {
  db_restore_and_reopen
  sqlite3_db_config db DEFENSIVE 0
  execsql {
    UPDATE t1_data set block = X'00000000' || substr(block, 5) WHERE
    rowid = fts5_rowid('segment', $segid, 4);
  }
  catchsql { INSERT INTO t1(t1) VALUES('integrity-check') }
} {1 {fts5: corruption found reading blob 137438953476 from table "t1"}}

db_restore_and_reopen
#db eval {SELECT rowid, fts5_decode(rowid, block) aS r FROM t1_data} {puts $r}


#--------------------------------------------------------------------
#

  do_execsql_test 2.$i.1 {
    BEGIN;
      UPDATE t1_data SET block = substr(block, 1, $i) WHERE rowid=$lrowid;
  }

  do_catchsql_test 2.$i.2 {
    INSERT INTO t1(t1) VALUES('integrity-check');
  } {/1.*fts5: corruption.*/}

  do_test 2.$i.3 {
    set res [catchsql {SELECT rowid FROM t1 WHERE t1 MATCH 'x*'}]
    expr {
        [string match {*fts5: corruption*} $res]
     || $res=="0 {$all}" 
    }
  } 1

  do_execsql_test 2.$i.4 {
    ROLLBACK;
    INSERT INTO t1(t1) VALUES('integrity-check');

      fconfigure $fd -translation binary
      set existing [read $fd [string length $hdr]]
      seek $fd 0
      puts -nonewline $fd $hdr
      close $fd

      set res [catchsql {SELECT rowid FROM x3 WHERE x3 MATCH 'x AND a'}]
      if {[string match {*fts5: corruption*} $res]} {incr nCorrupt}
      set {} 1
    } {1}

    if {($tn2 % 10)==0 && $existing != $hdr} {
      do_test 3.$tn.$tn2.2 {
        catchsql { INSERT INTO x3(x3) VALUES('integrity-check') }
      } {/.*fts5: corruption.*/}
      do_execsql_test 3.$tn.$tn2.3 {
        PRAGMA integrity_check(x3);
      } {/.*fts5: corruption.*/}
    }

    execsql ROLLBACK
  }

  do_test 3.$tn.x { expr $nCorrupt>0 } 1
}

          UPDATE x4_data SET block = substr(block, 1, length(block)-$nCut) 
          WHERE id = $rowid;
      }

      set res [catchsql {
        SELECT rowid FROM x4 WHERE x4 MATCH 'a' ORDER BY 1 DESC
      }]
      if {[string match {*fts5: corruption*} $res]} {incr nCorrupt}
      set {} 1
    } {1}

    execsql ROLLBACK
  }

  # do_test 4.$tn.x { expr $nCorrupt>0 } 1

    incr i
    do_test $tn.$i {
      db eval BEGIN
      db eval {DELETE FROM t1_data WHERE rowid = $::rowid}
      list [
        catch { db eval {SELECT rowid FROM t1 WHERE t1 MATCH 'x*'} } msg
      ] $msg
    } {/.*fts5: corruption.*/}
    catch { db eval ROLLBACK }
  }
}

do_3_test 3.2

do_execsql_test 3.3 {

do_execsql_test 6.1.1 {
  UPDATE t1_data SET block = 
  X'000000180630626262626201020201056161616161010203040A'
  WHERE rowid>100;
}
do_catchsql_test 6.1.2 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corruption.*/}

#-------
reset_db
sqlite3_db_config db DEFENSIVE 0
do_execsql_test 6.2.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(a);
  INSERT INTO t1(t1, rank) VALUES('pgsz', 32);
  INSERT INTO t1 VALUES('aa bb cc dd ee');
  SELECT pgno, quote(term) FROM t1_idx;
} {2 X'' 4 X'3064'}
do_execsql_test 6.2.1 {
  UPDATE t1_idx SET term = X'3065' WHERE pgno=4;
}
do_catchsql_test 6.2.2 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corruption.*/}

#-------
reset_db
sqlite3_db_config db DEFENSIVE 0
do_execsql_test 6.3.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(a);
  INSERT INTO t1 VALUES('abc abcdef abcdefghi');
  SELECT quote(block) FROM t1_data WHERE id>100;
}    {X'0000001C043061626301020204036465660102030703676869010204040808'}
do_execsql_test 6.3.1 {
  BEGIN;
    UPDATE t1_data SET block = 
      X'0000001C043061626301020204036465660102035003676869010204040808'
      ------------------------------------------^^---------------------
    WHERE id>100;
}
do_catchsql_test 6.3.2 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corruption.*/}
do_execsql_test 6.3.3 {
  ROLLBACK;
  BEGIN;
    UPDATE t1_data SET block = 
      X'0000001C043061626301020204036465660102030750676869010204040808'
      --------------------------------------------^^-------------------
    WHERE id>100;
}
do_catchsql_test 6.3.3 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corruption.*/}
do_execsql_test 6.3.4 {
  ROLLBACK;
  BEGIN;
    UPDATE t1_data SET block = 
      X'0000001C043061626301020204036465660102030707676869010204040850'
      --------------------------------------------------------------^^-
    WHERE id>100;
}
do_catchsql_test 6.3.5 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corruption.*/}
do_execsql_test 6.3.6 {
  ROLLBACK;
  BEGIN;
    UPDATE t1_data SET block = 
      X'0000001C503061626301020204036465660102030707676869010204040808'
      ----------^^-----------------------------------------------------
    WHERE id>100;
}
do_catchsql_test 6.3.5 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corruption.*/}


#------------------------------------------------------------------------
#
reset_db
proc rnddoc {n} {
  set map [list a b c d]

sqlite3_db_config db DEFENSIVE 0
do_test 7.1 {
  foreach i [db eval { SELECT rowid FROM t5_data WHERE rowid>100 }] {
    db eval BEGIN  
    db eval {DELETE FROM t5_data WHERE rowid = $i}
    set r [catchsql { INSERT INTO t5(t5) VALUES('integrity-check')} ]
    if {![string match {*fts5: corruption*} $r]} { error $r }
    db eval ROLLBACK  
  }
} {}

#------------------------------------------------------------------------
# Corruption within the structure record.
#

  append blob "06"          ;# write counter
  append blob "0002"        ;# first level has 0 segments merging, 2 other.
  append blob "450108"      ;# first segment
  execsql "REPLACE INTO t1_data VALUES(10, X'$blob')"
} {}
do_catchsql_test 9.1.2 {
  SELECT * FROM t1('one AND two');
} {/.*fts5: corrupt.*/}

do_test 9.2.1 {
  set    blob "12345678"    ;# cookie
  append blob "0205"        ;# 2 levels, total of 5 segments
  append blob "06"          ;# write counter
  append blob "0001"        ;# first level has 0 segments merging, 1 other.
  append blob "450108"      ;# first segment
  execsql "REPLACE INTO t1_data VALUES(10, X'$blob')"
} {}
do_catchsql_test 9.2.2 {
  SELECT * FROM t1('one AND two');
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 10.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 32768 pagesize 4096 filename c9.db

|     32: 65 6e 74 29 0d 00 00 00 03 0f bd 00 0f e8 0f ef   ent)............
|     48: 0f bd 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
| end c9.db
  }]
} {}
do_catchsql_test 10.1 {
  SELECT * FROM t1 WHERE t1 MATCH 'abandon';
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
#
reset_db
do_test 11.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {

|      0: 0d 00 00 00 03 0f d6 00 0f f4 0f e1 0f d6 00 00   ................
|   4048: 00 00 00 00 00 00 09 03 02 1b 72 65 62 75 69 6c   ..........rebuil
|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end c2.db
}]} {}

do_catchsql_test 12.1 {
  SELECT * FROM t1 WHERE t1 MATCH 'abandon';
} {/.*fts5: corrupt.*/}

do_catchsql_test 12.2 {
  INSERT INTO t1(t1, rank) VALUES('merge', 500);
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
#
reset_db
do_test 13.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end c14b.db
}]} {}

do_catchsql_test 14.1 {
  INSERT INTO t1(t1) VALUES('optimize');
} {/.*fts5: corrupt.*/}

#---------------------------------------------------------------------------
#
reset_db
do_test 15.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end c17.db
}]} {}

do_catchsql_test 16.1 {
INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corrupt.*/}

#--------------------------------------------------------------------------
reset_db
do_test 17.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 28672 pagesize 4096 filename c18.db

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end c18.db
}]} {}

do_catchsql_test 17.1 {
  SELECT * FROM t1 WHERE t1 MATCH 'abandon';
} {/.*fts5: corrupt.*/}

#--------------------------------------------------------------------------
reset_db
do_test 18.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 28672 pagesize 4096 filename c19b.db

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end c19b.db
}]} {}

do_catchsql_test 18.1 {
  INSERT INTO t1(t1) VALUES('optimize');
} {/.*fts5: corrupt.*/}

#--------------------------------------------------------------------------
reset_db
do_test 19.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 28672 pagesize 4096 filename c20b.db

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 86 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   .eck....optimize
| end c20b.db
}]} {}

do_catchsql_test 19.1 {
  INSERT INTO t1(t1) VALUES('optimize');
} {/.*fts5: corrupt.*/}

#--------------------------------------------------------------------------
reset_db
do_test 20.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 28672 pagesize 4096 filename crash-cf347c523f793c.db

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end crash-cf347c523f793c.db
}]} {}

do_catchsql_test 20.1 {
  SELECT * FROM t1 WHERE t1 MATCH 'abandon';
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 21.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 28672 pagesize 4096 filename c22b.db

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end c22b.db
}]} {}

do_catchsql_test 21.1 {
  DELETE FROM t1 WHERE t1 MATCH 'ab*ndon';
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
#
reset_db
do_test 22.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {

|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end c22b.db
}]} {}


do_catchsql_test 22.1 {
  INSERT INTO t1(t1) VALUES('optimize');
} {/.*fts5: corrupt.*/}

#--------------------------------------------------------------------------
reset_db
do_test 23.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 28672 pagesize 4096 filename c24b.db

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end c24b.db
}]} {}

do_catchsql_test 23.1 {
  INSERT INTO t1(t1) VALUES('optimize');
} {/.*fts5: corrupt.*/}

#--------------------------------------------------------------------------
reset_db
do_test 24.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 32768 pagesize 4096 filename crash-b87dfef02880fe.db

|   4064: 69 74 79 2d 63 68 65 63 6b 09 02 02 1b 72 65 62   ity-check....reb
|   4080: 75 69 6c 64 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   uild....optimize
| end crash-b87dfef02880fe.db
}]} {}

do_catchsql_test 24.1 {
  UPDATE t1 SET b=quote(zeroblob(200)) WHERE a MATCH 'thread*';
} {/.*fts5: corrupt.*/}

do_catchsql_test 24.2 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {1 {database disk image is malformed}}

#--------------------------------------------------------------------------
reset_db

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end crash-e3b1b19e4d4bcc.db
}]} {}

do_catchsql_test 25.1 {
  INSERT INTO t1(t1) VALUES('rebuild');
} {/.*fts5: corrupt.*/}

do_execsql_test 25.2 {
  PRAGMA page_size=512;
} 

#--------------------------------------------------------------------------
reset_db

|   4064: 69 74 79 2d 63 68 65 63 6b 09 02 02 1b 72 65 62   ity-check....reb
|   4080: 75 69 6c 64 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   uild....optimize
| end timeout-2ca5b0658c98.db
}]} {}

do_catchsql_test 27.1 {
  DELETE FROM t1 WHERE a MATCH 'fts*';
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 28.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 40960 pagesize 4096 filename crash-e2d47e0624a42c.db

}]} {}

do_catchsql_test 32.1 {
  SELECT snippet(t1, -1, '.', '..', '[', ']'), 
         highlight(t1, 2, '[', ']') 
  FROM t1('g + h') 
  WHERE rank MATCH 'bm25(1.0, 1.0)' ORDER BY rank;
} {/.*fts5: corrupt.*/}

do_catchsql_test 32.2 {
  SELECT * FROM t3;
} {1 {database disk image is malformed}}

do_catchsql_test 32.3 {
  SELECT * FROM t4;

  INSERT INTO t1_data VALUES(274877906945,X'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');
  INSERT INTO t1_idx VALUES(1,X'',2);
  INSERT INTO t1_idx VALUES(2,X'',2);
}

do_catchsql_test 41.1 {
  INSERT INTO t1(t1) VALUES('optimize');
} {/.*fts5: corrupt.*/}

do_catchsql_test 41.2 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {1 {database disk image is malformed}}

#-------------------------------------------------------------------------
reset_db

|   4064: 69 74 79 2d 63 68 65 63 6b 09 02 02 1b 72 65 62   ity-check....reb
|   4080: 75 69 6c 64 0a 01 02 1d 6f 70 74 69 5d 69 7a 65   uild....opti]ize
| end 8cfba7fbb67e48de92c6.db
}]} {}

do_catchsql_test 42.1 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {1 {fts5: checksum mismatch for table "t1"}}

#-------------------------------------------------------------------------
reset_db
do_test 43.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 24576 pagesize 4096 filename 89028ffd2c29b679e250.db

  INSERT INTO t1_docsize VALUES(1,X'030003');
  INSERT INTO t1_docsize VALUES(2,X'030003');
  INSERT INTO t1_docsize VALUES(3,X'030003');
} {}

do_catchsql_test 44.2 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corrupt.*/}

do_catchsql_test 44.3 {
  SELECT snippet(t1, -1, '.', '..', '', 2 ) FROM t1('g h') ORDER BY rank; 
} {0 {{.g.. .h..} {.g.. h} {.g.. .h..}}}

#--------------------------------------------------------------------------
reset_db

PRAGMA writable_schema=ON;
CREATE VIRTUAL TABLE t1 USING fts5(a,b,c);
CREATE TABLE IF NOT EXISTS 't1_data'(id INTEGER PRIMARY KEY, block BLOB);
REPLACE INTO t1_data VALUES(1,X'2eb1182424');
REPLACE INTO t1_data VALUES(10,X'000000000102080002010101020107');
INSERT INTO t1_data VALUES(137438953473,X'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');
INSERT INTO t1_data 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INSERT INTO t1_data 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');
INSERT INTO t1_data VALUES(274877906951,X'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');
CREATE TABLE IF NOT EXISTS 't1_idx'(segid, term, pgno, PRIMARY KEY(segid, term)) WITHOUT ROWID;
INSERT INTO t1_idx VALUES(2,X'',2);

INSERT INTO t2 VALUES('integrity-check');
PRAGMA writable_schema=OFF;
COMMIT;
} {}

do_catchsql_test 51.1 {
  SELECT max(rowid)==0 FROM t1('e*');
} {/.*fts5: corrupt.*/}

#--------------------------------------------------------------------------
reset_db
do_test 52.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
| size 40960 pagesize 4096 filename crash-2b92f77ddfe191.db

|   4048: 00 00 00 00 00 00 5d 03 00 00 00 00 00 00 00 00   ......].........
| end crash-c77b90b929dc92.db
}]} {}


do_catchsql_test 60.2 {
  SELECT (matchinfo(t1,591)) FROM t1 WHERE t1 MATCH 'e*eŸ'
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
do_test 61.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
.open --hexdb
| size 28672 pagesize 4096 filename crash-e5fa281edabddf.db

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end crash-37cecb4e784e9f.db
}]} {}

do_catchsql_test 66.1 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
#
reset_db
do_test 67.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {

|   4064: 69 74 79 2d 63 68 65 63 6b 09 00 00 00 00 00 00   ity-check.......
| end crash-31c462b8b665d0.db
}]} {}


do_catchsql_test 69.2 {
  SELECT * FROM t1 WHERE a MATCH 'fx*'
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 70.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
.open --hexdb

|   4064: 64 11 02 02 2b 69 6e 74 65 67 72 69 74 79 2d 63   d...+integrity-c
|   4080: 68 65 63 6b 0a 01 02 1d 6f 70 74 69 6d 69 7a 65   heck....optimize
| end sql025294.txt.db
}]} {}

do_catchsql_test 71.2 {
  INSERT INTO t1(t1) VALUES('integrity-check');
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 72.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
.open --hexdb

| end crash-77b86d070d0ac6.db
}]} {}

do_catchsql_test 72.1 {
  INSERT INTO ttt(ttt) VALUES('integrity-check');
} {1 {database disk image is malformed}}

do_catchsql_test 72.2 {
  SELECT 1 FROM ttt('e* NOT ee*');
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 73.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
.open --hexdb

|   4080: 00 00 00 00 0b 03 1b 01 76 65 72 73 69 6f 6e 04   ........version.
| end crash-b02ca2cc4d7dda.db
}]} {}

do_catchsql_test 73.1 {
  SELECT snippet(ttt,ttt, NOT 54 ), 
  * FROM ttt('e* NOT ee*e* NOT ee* NOT ee*e* NOT e*') ;
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 74.0 {
  sqlite3 db {}
  sqlite3_fts5_register_matchinfo db
  db deserialize [decode_hexdb {

|   4080: 00 00 03 03 02 01 03 03 02 02 01 00 00 00 00 00   ................
| end crash-0f47112aa7520c.db
  }]
} {}

do_catchsql_test 1.1 {
  SELECT * FROM t1('R*') WHERE (a,b)<=(current_date,0) ORDER BY rowid DESC;
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
#
reset_db
do_test 2.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {

|      0: 0d 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
|   4080: 00 00 03 03 02 01 03 03 02 02 01 00 00 00 00 00   ................
| end sql047467.txt.db
}]} {}

do_catchsql_test 2.1 {
SELECT * FROM t1('R*R*R*R*') WHERE (a,b)<=(current_date,0) ORDER BY rowid DESC;
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 3.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
.open --hexdb

|      0: 0a 00 00 00 01 0f f4 00 0f f4 00 00 00 00 00 00   ................
|   4080: 00 00 00 00 0b 03 1b 01 76 65 72 73 69 6f 6e 04   ........version.
| end crash-c69fcaceff1e50.db
}]} {}

do_catchsql_test 3.1 {
  UPDATE t1 SET b=quote(zeroblob(200)) WHERE a MATCH 'thra*T';
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 4.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
.open --hexdb

}]} {}

do_execsql_test 5.1 {
  INSERT INTO t1(t1,rank) VALUES('secure-delete',1);
}
do_catchsql_test 5.4 {
  UPDATE t1 SET content=randomblob(500);
} {/.*fts5: corrupt.*/}

#-------------------------------------------------------------------------
reset_db
do_test 6.0 {
  sqlite3 db {}
  db deserialize [decode_hexdb {
.open --hexdb

  UPDATE t1_data SET 
    block=X'0000001A04306162630102025501620202020101640206030303040806'
  WHERE id>10
}

do_catchsql_test 2.3 {
  DELETE FROM t1 WHERE rowid = 1
} {/.*fts5: corrupt.*/}

finish_test

}

db close
sqlite3 db test.db

do_catchsql_test 1.2 {
  SELECT * FROM t1
} {1 {fts5: corrupt structure record for table "t1"}}
do_catchsql_test 1.3 {
  DROP TABLE t1
} {0 {}}
do_execsql_test 1.4 {
  SELECT * FROM sqlite_schema
}

    execsql { SELECT 123 }
    faultsim_test_result \
      {1 {FOREIGN KEY constraint failed}} \
      {1 {out of memory}} \
      {1 {constraint failed}}
  }
}

#-------------------------------------------------------------------------
reset_db

do_execsql_test 13.0 {
  CREATE VIRTUAL TABLE t1 USING fts5(a, b);
  INSERT INTO t1 VALUES('abc def', X'123456');
}
faultsim_save_and_close


do_faultsim_test 13 -faults oom* -prep {
  faultsim_restore_and_reopen
} -body {
  execsql {
    UPDATE t1 SET a='def abc'
  }
} -test {
  faultsim_test_result {0 {}}
}

finish_test

sqlite3_db_config db DEFENSIVE 0
do_execsql_test 1.5 {
  DELETE FROM f1_data;
} {}

do_catchsql_test 1.6 {
  INSERT INTO f1(f1) VALUES('integrity-check');
} {/.*fts5: corrupt.*/}

do_execsql_test 1.7 {
  INSERT INTO f1(f1) VALUES('rebuild');
  INSERT INTO f1(f1) VALUES('integrity-check');
} {}

do_execsql_test 1.0 {
  CREATE VIRTUAL TABLE sss USING fts5(a, prefix=3); 
}

do_execsql_test 1.1 {
  INSERT INTO sss VALUES('まりや');
}

foreach {tn enc tok} {
  1   utf-8    ascii
  2   utf-16   ascii
  3   utf-8    unicode61
  4   utf-16   unicode61
} {
  reset_db

  do_execsql_test 1.$tn.0 " 
    PRAGMA encoding = '$enc'; 
    CREATE VIRTUAL TABLE vt2 USING fts5(c0, c1, tokenize=$tok);
  "

  do_execsql_test 1.$tn.1 {
    INSERT INTO vt2(c0, c1) VALUES ('bhal', x'17db');
  }

  do_execsql_test 1.$tn.2 {
    UPDATE vt2 SET c0='bhal';
  }

  do_execsql_test 1.$tn.3 {
    INSERT INTO vt2(vt2) VALUES('integrity-check')
  }

  do_execsql_test 1.$tn.4 {
    SELECT quote(c1) FROM vt2
  } {X'17DB'}
}

finish_test

     To be called from the implementation's xStep() method, as well
     as the xValue() and xInverse() methods of the {@link WindowFunction}
     subclass, to fetch the current per-call UDF state. On the
     first call to this method for any given sqlite3_context
     argument, the context is set to the given initial value. On all other
     calls, the 2nd argument is ignored.

     @see AggregateFunction.PerContextState#getAggregateState
  */
  protected final ValueHolder<T> getAggregateState(sqlite3_context cx, T initialValue){
    return map.getAggregateState(cx, initialValue);
  }

  /**
     To be called from the implementation's xFinal() method to fetch
     the final state of the UDF and remove its mapping.

     see AggregateFunction.PerContextState#takeAggregateState
  */
  protected final T takeAggregateState(sqlite3_context cx){
    return map.takeAggregateState(cx);
  }
}

**
**     name:  Path to file or directory (text value).
**     mode:  Value of stat.st_mode for directory entry (an integer).
**     mtime: Value of stat.st_mtime for directory entry (an integer).
**     data:  For a regular file, a blob containing the file data. For a
**            symlink, a text value containing the text of the link. For a
**            directory, NULL.
**     level: Directory hierarchy level.  Topmost is 1.
**
**   If a non-NULL value is specified for the optional $dir parameter and
**   $path is a relative path, then $path is interpreted relative to $dir. 
**   And the paths returned in the "name" column of the table are also 
**   relative to directory $dir.
**
** Notes on building this extension for Windows:

#include <sys/stat.h>
#include <fcntl.h>
#if !defined(_WIN32) && !defined(WIN32)
#  include <unistd.h>
#  include <dirent.h>
#  include <utime.h>
#  include <sys/time.h>
#  define STRUCT_STAT struct stat
#else
#  include "windirent.h"

#  include <direct.h>


#  define STRUCT_STAT struct _stat
#  define chmod(path,mode) fileio_chmod(path,mode)
#  define mkdir(path,mode) fileio_mkdir(path)
#endif
#include <time.h>
#include <errno.h>

/* When used as part of the CLI, the sqlite3_stdio.h module will have
** been included before this one. In that case use the sqlite3_stdio.h
** #defines.  If not, create our own for fopen().
*/
#ifndef _SQLITE3_STDIO_H_
# define sqlite3_fopen fopen
#endif

/*
** Structure of the fsdir() table-valued function
*/
                 /*    0    1    2     3    4     5           6          */
#define FSDIR_SCHEMA "(name,mode,mtime,data,level,path HIDDEN,dir HIDDEN)"

#define FSDIR_COLUMN_NAME     0     /* Name of the file */
#define FSDIR_COLUMN_MODE     1     /* Access mode */
#define FSDIR_COLUMN_MTIME    2     /* Last modification time */
#define FSDIR_COLUMN_DATA     3     /* File content */
#define FSDIR_COLUMN_LEVEL    4     /* Level.  Topmost is 1 */
#define FSDIR_COLUMN_PATH     5     /* Path to top of search */
#define FSDIR_COLUMN_DIR      6     /* Path is relative to this directory */

/*
** UTF8 chmod() function for Windows
*/
#if defined(_WIN32) || defined(WIN32)
static int fileio_chmod(const char *zPath, int pmode){
  sqlite3_int64 sz = strlen(zPath);

/*
** This function attempts to normalize the time values found in the stat()
** buffer to UTC.  This is necessary on Win32, where the runtime library
** appears to return these values as local times.
*/
static void statTimesToUtc(
  const char *zPath,
  STRUCT_STAT *pStatBuf
){
  HANDLE hFindFile;
  WIN32_FIND_DATAW fd;
  LPWSTR zUnicodeName;
  extern LPWSTR sqlite3_win32_utf8_to_unicode(const char*);
  zUnicodeName = sqlite3_win32_utf8_to_unicode(zPath);
  if( zUnicodeName ){

/*
** This function is used in place of stat().  On Windows, special handling
** is required in order for the included time to be returned as UTC.  On all
** other systems, this function simply calls stat().
*/
static int fileStat(
  const char *zPath,
  STRUCT_STAT *pStatBuf
){
#if defined(_WIN32)
  sqlite3_int64 sz = strlen(zPath);
  wchar_t *b1 = sqlite3_malloc64( (sz+1)*sizeof(b1[0]) );
  int rc;
  if( b1==0 ) return 1;
  sz = MultiByteToWideChar(CP_UTF8, 0, zPath, sz, b1, sz);

/*
** This function is used in place of lstat().  On Windows, special handling
** is required in order for the included time to be returned as UTC.  On all
** other systems, this function simply calls lstat().
*/
static int fileLinkStat(
  const char *zPath,
  STRUCT_STAT *pStatBuf
){
#if defined(_WIN32)
  return fileStat(zPath, pStatBuf);
#else
  return lstat(zPath, pStatBuf);
#endif
}

  if( zCopy==0 ){
    rc = SQLITE_NOMEM;
  }else{
    int nCopy = (int)strlen(zCopy);
    int i = 1;

    while( rc==SQLITE_OK ){
      STRUCT_STAT sStat;
      int rc2;

      for(; zCopy[i]!='/' && i<nCopy; i++);
      if( i==nCopy ) break;
      zCopy[i] = '\0';

      rc2 = fileStat(zCopy, &sStat);

  {
    if( S_ISDIR(mode) ){
      if( mkdir(zFile, mode) ){
        /* The mkdir() call to create the directory failed. This might not
        ** be an error though - if there is already a directory at the same
        ** path and either the permissions already match or can be changed
        ** to do so using chmod(), it is not an error.  */
        STRUCT_STAT sStat;
        if( errno!=EEXIST
         || 0!=fileStat(zFile, &sStat)
         || !S_ISDIR(sStat.st_mode)
         || ((sStat.st_mode&0777)!=(mode&0777) && 0!=chmod(zFile, mode&0777))
        ){
          return 1;
        }

  char *zDir;                /* Name of directory (nul-terminated) */
};

struct fsdir_cursor {
  sqlite3_vtab_cursor base;  /* Base class - must be first */

  int nLvl;                  /* Number of entries in aLvl[] array */
  int mxLvl;                 /* Maximum level */
  int iLvl;                  /* Index of current entry */
  FsdirLevel *aLvl;          /* Hierarchy of directories being traversed */

  const char *zBase;
  int nBase;

  STRUCT_STAT sStat;         /* Current lstat() results */
  char *zPath;               /* Path to current entry */
  sqlite3_int64 iRowid;      /* Current rowid */
};

typedef struct fsdir_tab fsdir_tab;
struct fsdir_tab {
  sqlite3_vtab base;         /* Base class - must be first */

** Advance an fsdir_cursor to its next row of output.
*/
static int fsdirNext(sqlite3_vtab_cursor *cur){
  fsdir_cursor *pCur = (fsdir_cursor*)cur;
  mode_t m = pCur->sStat.st_mode;

  pCur->iRowid++;
  if( S_ISDIR(m) && pCur->iLvl+3<pCur->mxLvl ){
    /* Descend into this directory */
    int iNew = pCur->iLvl + 1;
    FsdirLevel *pLvl;
    if( iNew>=pCur->nLvl ){
      int nNew = iNew+1;
      sqlite3_int64 nByte = nNew*sizeof(FsdirLevel);
      FsdirLevel *aNew = (FsdirLevel*)sqlite3_realloc64(pCur->aLvl, nByte);

        sqlite3_result_text(ctx, aBuf, n, SQLITE_TRANSIENT);
        if( aBuf!=aStatic ) sqlite3_free(aBuf);
#endif
      }else{
        readFileContents(ctx, pCur->zPath);
      }
      break;
    }
    case FSDIR_COLUMN_LEVEL:
      sqlite3_result_int(ctx, pCur->iLvl+2);
      break;
    case FSDIR_COLUMN_PATH:
    default: {
      /* The FSDIR_COLUMN_PATH and FSDIR_COLUMN_DIR are input parameters.
      ** always return their values as NULL */
      break;
    }
  }

  fsdir_cursor *pCur = (fsdir_cursor*)cur;
  return (pCur->zPath==0);
}

/*
** xFilter callback.
**
** idxNum bit      Meaning
**     0x01         PATH=N
**     0x02         DIR=N
**     0x04         LEVEL<N
**     0x08         LEVEL<=N  
*/
static int fsdirFilter(
  sqlite3_vtab_cursor *cur, 
  int idxNum, const char *idxStr,
  int argc, sqlite3_value **argv
){
  const char *zDir = 0;
  fsdir_cursor *pCur = (fsdir_cursor*)cur;
  int i;
  (void)idxStr;
  fsdirResetCursor(pCur);

  if( idxNum==0 ){
    fsdirSetErrmsg(pCur, "table function fsdir requires an argument");
    return SQLITE_ERROR;
  }

  assert( (idxNum & 0x01)!=0 && argc>0 );
  zDir = (const char*)sqlite3_value_text(argv[0]);
  if( zDir==0 ){
    fsdirSetErrmsg(pCur, "table function fsdir requires a non-NULL argument");
    return SQLITE_ERROR;
  }
  i = 1;
  if( (idxNum & 0x02)!=0 ){
    assert( argc>i );
    pCur->zBase = (const char*)sqlite3_value_text(argv[i++]);
  }
  if( (idxNum & 0x0c)!=0 ){
    assert( argc>i );
    pCur->mxLvl = sqlite3_value_int(argv[i++]);
    if( idxNum & 0x08 ) pCur->mxLvl++;
    if( pCur->mxLvl<=0 ) pCur->mxLvl = 1000000000;
  }else{
    pCur->mxLvl = 1000000000;
  }
  if( pCur->zBase ){
    pCur->nBase = (int)strlen(pCur->zBase)+1;
    pCur->zPath = sqlite3_mprintf("%s/%s", pCur->zBase, zDir);
  }else{
    pCur->zPath = sqlite3_mprintf("%s", zDir);
  }

** that uses the generate_series virtual table.  This routine needs to create
** a query plan for each invocation and compute an estimated cost for that
** plan.
**
** In this implementation idxNum is used to represent the
** query plan.  idxStr is unused.
**
** The query plan is represented by bits in idxNum:
**
**  0x01  The path value is supplied by argv[0]
**  0x02  dir is in argv[1]
**  0x04  maxdepth is in argv[1] or [2]
*/
static int fsdirBestIndex(
  sqlite3_vtab *tab,
  sqlite3_index_info *pIdxInfo
){
  int i;                 /* Loop over constraints */
  int idxPath = -1;      /* Index in pIdxInfo->aConstraint of PATH= */
  int idxDir = -1;       /* Index in pIdxInfo->aConstraint of DIR= */
  int idxLevel = -1;     /* Index in pIdxInfo->aConstraint of LEVEL< or <= */
  int idxLevelEQ = 0;    /* 0x08 for LEVEL<= or LEVEL=.  0x04 for LEVEL< */
  int omitLevel = 0;     /* omit the LEVEL constraint */
  int seenPath = 0;      /* True if an unusable PATH= constraint is seen */
  int seenDir = 0;       /* True if an unusable DIR= constraint is seen */
  const struct sqlite3_index_constraint *pConstraint;

  (void)tab;
  pConstraint = pIdxInfo->aConstraint;
  for(i=0; i<pIdxInfo->nConstraint; i++, pConstraint++){
    if( pConstraint->op==SQLITE_INDEX_CONSTRAINT_EQ ){
      switch( pConstraint->iColumn ){
        case FSDIR_COLUMN_PATH: {
          if( pConstraint->usable ){
            idxPath = i;
            seenPath = 0;
          }else if( idxPath<0 ){
            seenPath = 1;
          }
          break;
        }
        case FSDIR_COLUMN_DIR: {
          if( pConstraint->usable ){
            idxDir = i;
            seenDir = 0;
          }else if( idxDir<0 ){
            seenDir = 1;
          }
          break;
        }
        case FSDIR_COLUMN_LEVEL: {
          if( pConstraint->usable && idxLevel<0 ){
            idxLevel = i;
            idxLevelEQ = 0x08;
            omitLevel = 0;
          }
          break;
        }
      }
    }else
    if( pConstraint->iColumn==FSDIR_COLUMN_LEVEL
     && pConstraint->usable
     && idxLevel<0
    ){
      if( pConstraint->op==SQLITE_INDEX_CONSTRAINT_LE ){
        idxLevel = i;
        idxLevelEQ = 0x08;
        omitLevel = 1;
      }else if( pConstraint->op==SQLITE_INDEX_CONSTRAINT_LT ){
        idxLevel = i;
        idxLevelEQ = 0x04;
        omitLevel = 1;
      }
    } 
  }
  if( seenPath || seenDir ){
    /* If input parameters are unusable, disallow this plan */
    return SQLITE_CONSTRAINT;
  }

  if( idxPath<0 ){
    pIdxInfo->idxNum = 0;
    /* The pIdxInfo->estimatedCost should have been initialized to a huge
    ** number.  Leave it unchanged. */
    pIdxInfo->estimatedRows = 0x7fffffff;
  }else{
    pIdxInfo->aConstraintUsage[idxPath].omit = 1;
    pIdxInfo->aConstraintUsage[idxPath].argvIndex = 1;
    pIdxInfo->idxNum = 0x01;
    pIdxInfo->estimatedCost = 1.0e9;
    i = 2;
    if( idxDir>=0 ){
      pIdxInfo->aConstraintUsage[idxDir].omit = 1;
      pIdxInfo->aConstraintUsage[idxDir].argvIndex = i++;
      pIdxInfo->idxNum |= 0x02;
      pIdxInfo->estimatedCost /= 1.0e4;
    }
    if( idxLevel>=0 ){
      pIdxInfo->aConstraintUsage[idxLevel].omit = omitLevel;
      pIdxInfo->aConstraintUsage[idxLevel].argvIndex = i++;
      pIdxInfo->idxNum |= idxLevelEQ;
      pIdxInfo->estimatedCost /= 1.0e4;
    }
  }

  return SQLITE_OK;
}

/*

/*
** 2025-06-05
**
** 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.
**
*************************************************************************
**
** An implementation of opendir(), readdir(), and closedir() for Windows,
** based on the FindFirstFile(), FindNextFile(), and FindClose() APIs
** of Win32.
**
** #include this file inside any C-code module that needs to use
** opendir()/readdir()/closedir().  This file is a no-op on non-Windows
** machines.  On Windows, static functions are defined that implement
** those standard interfaces.
*/
#if defined(_WIN32) && defined(_MSC_VER) && !defined(SQLITE_WINDIRENT_H)
#define SQLITE_WINDIRENT_H

#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <io.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#ifndef FILENAME_MAX
# define FILENAME_MAX (260)
#endif
#ifndef S_ISREG
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif
#ifndef S_ISDIR
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
#ifndef S_ISLNK
#define S_ISLNK(m) (0)
#endif
typedef unsigned short mode_t;

/* The dirent object for Windows is abbreviated.  The only field really
** usable by applications is d_name[].
*/
struct dirent {
 int d_ino;                  /* Inode number (synthesized) */
 unsigned d_attributes;      /* File attributes */
 char d_name[FILENAME_MAX];  /* Null-terminated filename */
};

/* The internals of DIR are opaque according to standards.  So it
** does not matter what we put here. */
typedef struct DIR DIR;
struct DIR {
  intptr_t d_handle;         /* Handle for findfirst()/findnext() */
  struct dirent cur;         /* Current entry */
};

/* Ignore hidden and system files */
#define WindowsFileToIgnore(a) \
    ((((a).attrib)&_A_HIDDEN) || (((a).attrib)&_A_SYSTEM))

/*
** Close a previously opened directory
*/
static int closedir(DIR *pDir){
  int rc = 0;
  if( pDir==0 ){
    return EINVAL;
  }
  if( pDir->d_handle!=0 && pDir->d_handle!=(-1) ){
    rc = _findclose(pDir->d_handle);
  }
  sqlite3_free(pDir);
  return rc;
}

/*
** Open a new directory.  The directory name should be UTF-8 encoded.
** appropriate translations happen automatically.
*/
static DIR *opendir(const char *zDirName){
  DIR *pDir;
  wchar_t *b1;
  sqlite3_int64 sz;
  struct _wfinddata_t data;

  pDir = sqlite3_malloc64( sizeof(DIR) );
  if( pDir==0 ) return 0;
  memset(pDir, 0, sizeof(DIR));
  memset(&data, 0, sizeof(data));
  sz = strlen(zDirName);
  b1 = sqlite3_malloc64( (sz+3)*sizeof(b1[0]) );
  if( b1==0 ){
    closedir(pDir);
    return NULL;
  }
  sz = MultiByteToWideChar(CP_UTF8, 0, zDirName, sz, b1, sz);
  b1[sz++] = '\\';
  b1[sz++] = '*';
  b1[sz] = 0;
  if( sz+1>sizeof(data.name)/sizeof(data.name[0]) ){
    closedir(pDir);
    sqlite3_free(b1);
    return NULL;
  }
  memcpy(data.name, b1, (sz+1)*sizeof(b1[0]));
  sqlite3_free(b1);
  pDir->d_handle = _wfindfirst(data.name, &data);
  if( pDir->d_handle<0 ){
    closedir(pDir);
    return NULL;
  }
  while( WindowsFileToIgnore(data) ){
    memset(&data, 0, sizeof(data));
    if( _wfindnext(pDir->d_handle, &data)==-1 ){
      closedir(pDir);
      return NULL;
    }
  }
  pDir->cur.d_ino = 0;
  pDir->cur.d_attributes = data.attrib;
  WideCharToMultiByte(CP_UTF8, 0, data.name, -1,
                      pDir->cur.d_name, FILENAME_MAX, 0, 0);
  return pDir;
}

/*
** Read the next entry from a directory.
**
** The returned struct-dirent object is managed by DIR.  It is only
** valid until the next readdir() or closedir() call.  Only the
** d_name[] field is meaningful.  The d_name[] value has been
** translated into UTF8.
*/
static struct dirent *readdir(DIR *pDir){
  struct _wfinddata_t data;
  if( pDir==0 ) return 0;
  if( (pDir->cur.d_ino++)==0 ){
    return &pDir->cur;
  }
  do{
    memset(&data, 0, sizeof(data));
    if( _wfindnext(pDir->d_handle, &data)==-1 ){
      return NULL;
    }
  }while( WindowsFileToIgnore(data) );
  pDir->cur.d_attributes = data.attrib;
  WideCharToMultiByte(CP_UTF8, 0, data.name, -1,
                      pDir->cur.d_name, FILENAME_MAX, 0, 0);
  return &pDir->cur;
}

#endif /* defined(_WIN32) && defined(_MSC_VER) */

  #include "sqlite3ext.h"
  SQLITE_EXTENSION_INIT1
#else
  #include "sqlite3.h"
#endif
int sqlite3GetToken(const unsigned char*,int*); /* In the SQLite core */

#include <stddef.h>

/*
** If building separately, we will need some setup that is normally
** found in sqliteInt.h
*/
#if !defined(SQLITE_AMALGAMATION)
#include "sqlite3rtree.h"
typedef sqlite3_int64 i64;

# define ALWAYS(X)      ((X)?1:(assert(0),0))
# define NEVER(X)       ((X)?(assert(0),1):0)
#else
# define ALWAYS(X)      (X)
# define NEVER(X)       (X)
#endif
#ifndef offsetof
# define offsetof(ST,M) ((size_t)((char*)&((ST*)0)->M - (char*)0))
#endif
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
# define FLEXARRAY
#else
# define FLEXARRAY 1
#endif
#endif /* !defined(SQLITE_AMALGAMATION) */

  -DSQLITE_ENABLE_FTS5 \
  -DSQLITE_ENABLE_MATH_FUNCTIONS \
  -DSQLITE_ENABLE_OFFSET_SQL_FUNC \
  -DSQLITE_ENABLE_PREUPDATE_HOOK \
  -DSQLITE_ENABLE_RTREE \
  -DSQLITE_ENABLE_SESSION \
  -DSQLITE_ENABLE_STMTVTAB \
  -DSQLITE_ENABLE_UNKNOWN_SQL_FUNCTION \
  -DSQLITE_ENABLE_COLUMN_METADATA

ifeq (0,$(wasm-bare-bones))
  # The so-called canonical build is full-featured:
  SQLITE_OPT := \
    $(SQLITE_OPT.common) \
    $(SQLITE_OPT.full-featured)
else

#
# Note that the SQLITE_... build flags used here have NO EFFECT on the
# JS/WASM build. They are solely for use with $(bin.c-pp) itself.
#
# -D... flags which should be included in all invocations should be
# appended to $(SQLITE.CALL.C-PP.FILTER.global).
bin.c-pp := ./c-pp
$(bin.c-pp): c-pp.c $(sqlite3.c) # $(MAKEFILE)
	$(CC) -O0 -o $@ c-pp.c $(sqlite3.c) '-DCMPP_DEFAULT_DELIM="//#"' -I$(dir.top) \
		-DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_OMIT_DEPRECATED -DSQLITE_OMIT_UTF16 \
		-DSQLITE_OMIT_SHARED_CACHE -DSQLITE_OMIT_WAL -DSQLITE_THREADSAFE=0 \
		-DSQLITE_TEMP_STORE=3
DISTCLEAN_FILES += $(bin.c-pp)
SQLITE.CALL.C-PP.FILTER.global ?=
ifeq (1,$(SQLITE_C_IS_SEE))

########################################################################
# emcc flags for .c/.o/.wasm/.js.
emcc.flags :=
ifeq (1,$(emcc.verbose))
emcc.flags += -v
# -v is _very_ loud but also informative about what it's doing
endif


########################################################################
# emcc flags for .c/.o.
emcc.cflags :=
emcc.cflags += -std=c99 -fPIC
# -------------^^^^^^^^ we need c99 for $(sqlite3-wasm.c), primarily
# for variadic macros and snprintf() to implement
# sqlite3_wasm_enum_json().
emcc.cflags += -I. -I$(dir.top)
########################################################################
# emcc flags specific to building .js/.wasm files...
emcc.jsflags := -fPIC
emcc.jsflags += --no-entry
emcc.jsflags += -sWASM_BIGINT=$(emcc.WASM_BIGINT)
emcc.jsflags += -sMODULARIZE
emcc.jsflags += -sDYNAMIC_EXECUTION=0
emcc.jsflags += -sNO_POLYFILL
emcc.jsflags += -sEXPORTED_FUNCTIONS=@$(EXPORTED_FUNCTIONS.api)
emcc.exportedRuntimeMethods := \
    -sEXPORTED_RUNTIME_METHODS=wasmMemory,HEAP8,HEAPU8,HEAP16,HEAPU16,HEAP32,HEAPU32,HEAP64,HEAPU64
# wasmMemory ==> required by our code for use with -sIMPORTED_MEMORY
# Emscripten 4.0.7 (2025-04-15) stops exporting HEAP* by default
emcc.jsflags += $(emcc.exportedRuntimeMethods)
emcc.jsflags += -sUSE_CLOSURE_COMPILER=0
emcc.jsflags += -sIMPORTED_MEMORY
ifeq (,$(filter -O0,$(emcc_opt)))
emcc.assert ?= 0
else
emcc.assert ?= 2

_sqlite3_column_database_name
_sqlite3_column_origin_name
_sqlite3_column_table_name
_sqlite3_create_module
_sqlite3_create_module_v2
_sqlite3_create_window_function
_sqlite3_declare_vtab
_sqlite3_drop_modules
_sqlite3_preupdate_blobwrite
_sqlite3_preupdate_count
_sqlite3_preupdate_depth
_sqlite3_preupdate_hook
_sqlite3_preupdate_new
_sqlite3_preupdate_old
_sqlite3_progress_handler
_sqlite3_set_authorizer
_sqlite3_vtab_collation
_sqlite3_vtab_distinct
_sqlite3_vtab_in
_sqlite3_vtab_in_first
_sqlite3_vtab_in_next
_sqlite3_vtab_nochange
_sqlite3_vtab_on_conflict
_sqlite3_vtab_rhs_value
_sqlite3changegroup_add
_sqlite3changegroup_add_strm
_sqlite3changegroup_delete
_sqlite3changegroup_new
_sqlite3changegroup_output
_sqlite3changegroup_output_strm
_sqlite3changeset_apply

_sqlite3session_indirect
_sqlite3session_isempty
_sqlite3session_memory_used
_sqlite3session_object_config
_sqlite3session_patchset
_sqlite3session_patchset_strm
_sqlite3session_table_filter

  initializes the main API pieces so that the downstream components
  (e.g. sqlite3-api-oo1.js) have all of the infrastructure that they
  need.
*/
globalThis.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
  'use strict';
  const toss = (...args)=>{throw new Error(args.join(' '))};

  const capi = sqlite3.capi, wasm = sqlite3.wasm, util = sqlite3.util;
  globalThis.WhWasmUtilInstaller(wasm);
  delete globalThis.WhWasmUtilInstaller;

  if(0){
    /**
       Please keep this block around as a maintenance reminder

            }
          }
        }),
        "*"/*pUserData*/
      ]]
    );
  }/* sqlite3_set_authorizer() */

  if( !!wasm.exports.sqlite3_column_origin_name ){
    wasm.bindingSignatures.push(
      ["sqlite3_column_database_name","string", "sqlite3_stmt*", "int"],
      ["sqlite3_column_origin_name","string", "sqlite3_stmt*", "int"],
      ["sqlite3_column_table_name","string", "sqlite3_stmt*", "int"]
    );
  }

  if(false && wasm.compileOptionUsed('SQLITE_ENABLE_NORMALIZE')){
    /* ^^^ "the problem" is that this is an optional feature and the
       build-time function-export list does not currently take
       optional features into account. */
    wasm.bindingSignatures.push(["sqlite3_normalized_sql", "string", "sqlite3_stmt*"]);
  }

  ***********************************************************************

  This file contains the so-called OO #1 API wrapper for the sqlite3
  WASM build. It requires that sqlite3-api-glue.js has already run
  and it installs its deliverable as globalThis.sqlite3.oo1.
*/
globalThis.sqlite3ApiBootstrap.initializers.push(function(sqlite3){

  const toss3 = (...args)=>{throw new sqlite3.SQLite3Error(...args)};

  const capi = sqlite3.capi, wasm = sqlite3.wasm, util = sqlite3.util;
  /* What follows is colloquially known as "OO API #1". It is a
     binding of the sqlite3 API which is designed to be run within
     the same thread (main or worker) as the one in which the
     sqlite3 WASM binding was initialized. This wrapper cannot use

                 another connection, may invalidate the column count
                 and names. */) ? 0 : 1;
            evalFirstResult = false;
            if(arg.cbArg || resultRows){
              const cbArgCache = Object.create(null)
              /* 2nd arg for arg.cbArg, used by (at least) row-to-object
                 converter */;
              for( ; stmt.step(); __execLock.delete(stmt) ){
                if(0===gotColNames++){
                  stmt.getColumnNames(cbArgCache.columnNames = (opt.columnNames || []));
                }
                __execLock.add(stmt);
                const row = arg.cbArg(stmt,cbArgCache);
                if(resultRows) resultRows.push(row);
                if(callback && false === callback.call(opt, row, stmt)){
                  break;
                }
              }
              __execLock.delete(stmt);
            }
            if(0===gotColNames){
              /* opt.columnNames was provided but we visited no result rows */
              stmt.getColumnNames(opt.columnNames);
            }
          }else{
            stmt.step();

        }/*prepare() loop*/
      }/*catch(e){
        sqlite3.config.warn("DB.exec() is propagating exception",opt,e);
        throw e;
      }*/finally{
        wasm.scopedAllocPop(stack);
        if(stmt){
          __execLock.delete(stmt);
          stmt.finalize();
        }
      }
      return arg.returnVal();
    }/*exec()*/,

    /**

    */
    openStatementCount: function(){
      return this.pointer ? Object.keys(__stmtMap.get(this)).length : 0;
    },

    /**
       Starts a transaction, calls the given callback, and then either
       rolls back or commits the transaction, depending on whether the
       callback throws. The callback is passed this db object as its
       only argument. On success, returns the result of the
       callback. Throws on error.

       Note that transactions may not be nested, so this will throw if
       it is called recursively. For nested transactions, use the
       savepoint() method or manually manage SAVEPOINTs using exec().

      toss3("Invalid bind() parameter name: "+key);
    }
    else if(n<1 || n>stmt.parameterCount) toss3("Bind index",key,"is out of range.");
    return n;
  };

  /**
     Each Stmt object which is "locked" by DB.exec() gets an entry
     here to note that "lock".

     The reason this is in place is because exec({callback:...})'s
     callback gets access to the Stmt objects created internally by
     exec() but it must not use certain Stmt APIs.
  */
  const __execLock = new Set();
  /**
     This is a Stmt.get() counterpart of __execLock. Each time
     Stmt.step() returns true, the statement is added to this set,
     indicating that Stmt.get() is legal. Stmt APIs which invalidate
     that status remove the Stmt object from this set, which will
     cause Stmt.get() to throw with a descriptive error message
     instead of a more generic "API misuse" if we were to allow that
     call to reach the C API.
  */
  const __stmtMayGet = new Set();

  /**
     Stmt APIs which are prohibited on locked objects must call
     affirmNotLockedByExec() before doing any work.

     If __execLock.has(stmt) is truthy, this throws an exception
     complaining that the 2nd argument (an operation name,
     e.g. "bind()") is not legal while the statement is "locked".
     Locking happens before an exec()-like callback is passed a
     statement, to ensure that the callback does not mutate or
     finalize the statement. If it does not throw, it returns stmt.
  */
  const affirmNotLockedByExec = function(stmt,currentOpName){
    if(__execLock.has(stmt)){
      toss3("Operation is illegal when statement is locked:",currentOpName);
    }
    return stmt;
  };

  /**
     Binds a single bound parameter value on the given stmt at the

          break;
        }
        default:
          sqlite3.config.warn("Unsupported bind() argument type:",val);
          toss3("Unsupported bind() argument type: "+(typeof val));
    }
    if(rc) DB.checkRc(stmt.db.pointer, rc);

    return stmt;
  };

  Stmt.prototype = {
    /**
       "Finalizes" this statement. This is a no-op if the statement
       has already been finalized. Returns the result of

    */
    finalize: function(){
      if(this.pointer){
        affirmNotLockedByExec(this,'finalize()');
        const rc = capi.sqlite3_finalize(this.pointer);
        delete __stmtMap.get(this.db)[this.pointer];
        __ptrMap.delete(this);
        __execLock.delete(this);
        __stmtMayGet.delete(this);
        delete this.parameterCount;

        delete this.db;
        return rc;
      }
    },
    /**
       Clears all bound values. Returns this object.  Throws if this
       statement has been finalized or if modification of the
       statement is currently illegal (e.g. in the per-row callback of
       a DB.exec() call).
    */
    clearBindings: function(){
      affirmNotLockedByExec(affirmStmtOpen(this), 'clearBindings()')
      capi.sqlite3_clear_bindings(this.pointer);
        __stmtMayGet.delete(this);
      return this;
    },
    /**
       Resets this statement so that it may be step()ed again from the
       beginning. Returns this object. Throws if this statement has
       been finalized, if it may not legally be reset because it is
       currently being used from a DB.exec() callback, or if the

       https://sqlite.org/forum/forumpost/36f7a2e7494897df
    */
    reset: function(alsoClearBinds){
      affirmNotLockedByExec(this,'reset()');
      if(alsoClearBinds) this.clearBindings();
      const rc = capi.sqlite3_reset(affirmStmtOpen(this).pointer);
      __stmtMayGet.delete(this);
      checkSqlite3Rc(this.db, rc);
      return this;
    },
    /**
       Binds one or more values to its bindable parameters. It
       accepts 1 or 2 arguments:

           but this approach simplifies certain client-side
           uses when passing on arguments between 2+ levels of
           functions. */
        return this;
      }else if(!this.parameterCount){
        toss3("This statement has no bindable parameters.");
      }
      __stmtMayGet.delete(this);
      if(null===arg){
        /* bind NULL */
        return bindOne(this, ndx, BindTypes.null, arg);
      }
      else if(Array.isArray(arg)){
        /* bind each entry by index */
        if(1!==arguments.length){

       row of data is available, a falsy value is returned.  Throws on
       error.
    */
    step: function(){
      affirmNotLockedByExec(this, 'step()');
      const rc = capi.sqlite3_step(affirmStmtOpen(this).pointer);
      switch(rc){
        case capi.SQLITE_DONE:
          __stmtMayGet.delete(this);
          return false;
        case capi.SQLITE_ROW:
          __stmtMayGet.add(this);
          return true;
        default:
          __stmtMayGet.delete(this);
          sqlite3.config.warn("sqlite3_step() rc=",rc,
                              capi.sqlite3_js_rc_str(rc),
                              "SQL =", capi.sqlite3_sql(this.pointer));
          DB.checkRc(this.db.pointer, rc);
      }
    },
    /**
       Functions exactly like step() except that...

       1) On success, it calls this.reset() and returns this object.

       Potential TODO: add type ID SQLITE_JSON, which fetches the
       result as a string and passes it (if it's not null) to
       JSON.parse(), returning the result of that. Until then,
       getJSON() can be used for that.
    */
    get: function(ndx,asType){
      if(!__stmtMayGet.has(affirmStmtOpen(this))){
        toss3("Stmt.step() has not (recently) returned true.");
      }
      if(Array.isArray(ndx)){
        let i = 0;
        const n = this.columnCount;
        while(i<n){
          ndx[i] = this.get(i++);

/* SQLITE_EXTRA_INIT vs SQLITE_EXTRA_INIT_MUTEXED:
** see https://sqlite.org/forum/forumpost/14183b98fc0b1dea */
#  define SQLITE_EXTRA_INIT_MUTEXED sqlite3_wasm_extra_init
#endif

/*
** If SQLITE_WASM_BARE_BONES is defined, undefine most of the ENABLE
** macros. This will, when using the canonical makefile, also elide
** any C functions from the WASM exports which are listed in
** ./EXPORT_FUNCTIONS.sqlite3-extras.
*/
#ifdef SQLITE_WASM_BARE_BONES
#  undef  SQLITE_ENABLE_COLUMN_METADATA
#  undef  SQLITE_ENABLE_DBPAGE_VTAB
#  undef  SQLITE_ENABLE_DBSTAT_VTAB
#  undef  SQLITE_ENABLE_EXPLAIN_COMMENTS
#  undef  SQLITE_ENABLE_FTS5
#  undef  SQLITE_ENABLE_OFFSET_SQL_FUNC
#  undef  SQLITE_ENABLE_PREUPDATE_HOOK
#  undef  SQLITE_ENABLE_RTREE

    typedef struct {
      int argvIndex;
      unsigned char omit;
    } sqlite3_index_constraint_usage;
    { /* Validate that the above struct sizeof()s match
      ** expectations. We could improve upon this by
      ** checking the offsetof() for each member. */
      const sqlite3_index_info siiCheck = {0};
#define IndexSzCheck(T,M)           \
      (sizeof(T) == sizeof(*siiCheck.M))
      if(!IndexSzCheck(sqlite3_index_constraint,aConstraint)
         || !IndexSzCheck(sqlite3_index_orderby,aOrderBy)
         || !IndexSzCheck(sqlite3_index_constraint_usage,aConstraintUsage)){
        assert(!"sizeof mismatch in sqlite3_index_... struct(s)");
        return 0;

  pf("\t$(bin.emcc) -o $@ $(emcc_opt_full) $(emcc.flags) \\\n");
  pf("\t\t$(emcc.jsflags) -sENVIRONMENT=$(emcc.environment.%s) \\\n", zMode);
  pf("\t\t$(pre-post-%s-%s.flags) \\\n", zNM);
  pf("\t\t$(emcc.flags.%s) $(emcc.flags.%s.%s) \\\n", zName, zNM);
  pf("\t\t$(cflags.common) $(SQLITE_OPT) \\\n"
     "\t\t$(cflags.%s) $(cflags.%s.%s) \\\n"
     "\t\t$(cflags.wasm_extra_init) $(sqlite3-wasm.cfiles)\n", zName, zNM);
  if( (LIBMODE_ESM & flags) || (LIBMODE_NODEJS & flags) ){
    /* TODO? Replace this $(call) with the corresponding makefile
    ** code.  OTOH, we also use this $(call) in the speedtest1-wasmfs
    ** build, which is not part of the rules emitted by this
    ** program. */
    pf("\t@$(call SQLITE.CALL.xJS.ESM-EXPORT-DEFAULT,1,%d)\n",
       (LIBMODE_WASMFS & flags) ? 1 : 0);
  }

            const opt = document.createElement('option');
            eFlags.appendChild(opt);
            const lbl = nbspPad(f)+flags[f];
            //opt.innerText = lbl;
            opt.innerHTML = lbl;
            opt.value = f;
            if(preselectedFlags.indexOf(f) >= 0) opt.selected = true;
        });
        const cbReverseLog = E('#cb-reverse-log-order');
        const lblReverseLog = E('#lbl-reverse-log-order');
        if(cbReverseLog.checked){
            lblReverseLog.classList.add('warning');
            eOut.classList.add('reverse');
        }
        cbReverseLog.addEventListener('change', function(){

            if(!pVfs){
                log2('error',"Unknown VFS:",vfs);
                return;
            }
            argv.push("--vfs", vfs);
            log2('',"Using VFS:",vfs);
            if('kvvfs' === vfs){
                forceSize = 2 /* 5 uses approx. 4.96mb */;
                dbFile = 'session';
                log2('warning',"kvvfs VFS: forcing --size",forceSize,
                     "and filename '"+dbFile+"'.");
                capi.sqlite3_js_kvvfs_clear(dbFile);
            }
        }
        if(forceSize){

        T.assert(wasm.isPtr(st.pointer))
          .mustThrowMatching(()=>st.pointer=1, /read-only/)
          .assert(1===this.db.openStatementCount())
          .assert(
            capi.sqlite3_stmt_status(
              st, capi.SQLITE_STMTSTATUS_RUN, 0
            ) === 0)

          .assert('a' === st.getColumnName(0))
          .mustThrowMatching(()=>st.columnCount=2,
                             /columnCount property is read-only/)
          .assert(1===st.columnCount)
          .assert(0===st.parameterCount)
          .mustThrow(()=>st.bind(1,null))
          .assert(true===st.step())

          .assert(3 === st.get({}).a)
          .assert(3 === st.get([])[0])
          .assert(3 === st.getJSON(0))
          .assert(st.get(0,capi.SQLITE_BLOB) instanceof Uint8Array)
          .assert(1===st.get(0,capi.SQLITE_BLOB).length)
          .assert(st.getBlob(0) instanceof Uint8Array)
          .assert('3'.charCodeAt(0) === st.getBlob(0)[0])

          .assert(false===st.step())
          .mustThrowMatching(()=>st.get(0),
                             "Stmt.step() has not (recently) returned true.")
          .assert(
            capi.sqlite3_stmt_status(
              st, capi.SQLITE_STMTSTATUS_RUN, 0
            ) > 0);

        T.assert(this.progressHandlerCount>0
                 || wasm.compileOptionUsed('OMIT_PROGRESS_CALLBACK'),
                 "Expecting progress callback.");




      }finally{
        rc = st.finalize();
      }
      T.assert(!st.pointer)
        .assert(0===this.db.openStatementCount())
        .assert(0===rc);

            pVfsDflt = capi.sqlite3_vfs_find(0),
            pVfsDb = capi.sqlite3_js_db_vfs(db.pointer);
      T.assert(pVfsMem > 0)
        .assert(pVfsDflt > 0)
        .assert(pVfsDb > 0)
        .assert(pVfsMem !== pVfsDflt
                /* memdb lives on top of the default vfs */)
        .assert(pVfsDb === pVfsDflt || pVfsDb === pVfsMem)
      ;
      /*const vMem = new capi.sqlite3_vfs(pVfsMem),
        vDflt = new capi.sqlite3_vfs(pVfsDflt),
        vDb = new capi.sqlite3_vfs(pVfsDb);*/
      const duv = capi.sqlite3_js_db_uses_vfs;
      T.assert(pVfsDflt === duv(db.pointer, 0)
               || pVfsMem === duv(db.pointer,0))

          }else{
            log("No BigInt support. Skipping related tests.");
            log("\"The problem\" here is that we can manipulate, at the byte level,",
                "heap memory to set 64-bit values, but we can't get those values",
                "back into JS because of the lack of 64-bit integer support.");
          }
        }finally{
          //const x = w.scopedAlloc(1), y = w.scopedAlloc(1), z = w.scopedAlloc(1);
          //log("x=",x,"y=",y,"z=",z); // just looking at the alignment
          w.scopedAllocPop(stack);
        }
      }
    }/* jaccwabyt-specific tests */)

  ////////////////////////////////////////////////////////////////////////

//#if enable-see
    .t({
      name: 'kvvfs with SEE encryption',
      predicate: ()=>(isUIThread()
                      || "Only available in main thread."),
      test: function(sqlite3){
        this.kvvfsUnlink();
        let initDb = true;
        const tryKey = function(keyKey, key, expectCount){
          let db;
          //console.debug('tryKey()',arguments);
          const ctoropt = {
            filename: this.kvvfsDbFile
            //vfs: 'kvvfs'
            //,flags: 'ct'
          };



          try {
            if (initDb) {
              initDb = false;
              db = new this.JDb({

                ...ctoropt,
                [keyKey]: key
              });
              db.exec([
                "drop table if exists t;",
                "create table t(a);"

              ]);
              db.close();
              // Ensure that it's actually encrypted...
              let err;
              try {
                db = new this.JDb(ctoropt);



                T.assert(db, 'db opened') /* opening is fine, but... */;
                db.exec("select 1 from sqlite_schema");
                console.warn("(should not be reached) sessionStorage =", sessionStorage);
              } catch (e) {
                err = e;
              } finally {
                db.close()
              }
              T.assert(err, "Expecting an exception")
                .assert(sqlite3.capi.SQLITE_NOTADB == err.resultCode,
                        "Expecting NOTADB");
            }/*initDb*/
            //console.debug('tryKey()',arguments);
            db = new sqlite3.oo1.DB({

              ...ctoropt,
              vfs: 'kvvfs',

              [keyKey]: key
            });
            db.exec("insert into t(a) values (1),(2)");
            T.assert(expectCount === db.selectValue('select sum(a) from t'));
          } finally {
            if (db) db.close();

          }
        }.bind(this);
        const hexFoo = new Uint8Array([0x66,0x6f,0x6f]/*=="foo"*/);
        tryKey('textkey', 'foo', 3);
        T.assert( !initDb );
        tryKey('textkey', 'foo', 6);
        this.kvvfsUnlink();
        initDb = true;
        tryKey('key', 'foo', 3);
        T.assert( !initDb );
        tryKey('key', hexFoo, 6);
        this.kvvfsUnlink();
        initDb = true;
        tryKey('hexkey', hexFoo, 3);
        T.assert( !initDb );
        tryKey('hexkey', hexFoo, 6);
        this.kvvfsUnlink();
      }
    })/*kvvfs with SEE*/
//#endif enable-see
  ;/* end kvvfs tests */

  ////////////////////////////////////////////////////////////////////////
  T.g('Hook APIs')

                 T.assert('number' === typeof capi.sqlite3_preupdate_old_js(pDb, 0));
                  break;
                default: toss("Unexpected hook operator:",op);
            }
          },
          9
        );
        T.assert( 0==rc );
        db.transaction((d)=>{
          d.exec([
            "create table t(a);",
            "insert into t(a) values(1);",
            "update t set a=2;",
            "update t set a=3;",
            "delete from t where a=3"
          ]);
        });
        T.assert(1 === countHook[capi.SQLITE_INSERT])
          .assert(2 === countHook[capi.SQLITE_UPDATE])
          .assert(1 === countHook[capi.SQLITE_DELETE]);
        //wasm.xWrap.FuncPtrAdapter.debugFuncInstall = true;
        T.assert( !!capi.sqlite3_preupdate_hook(db, 0, 0) );
        //wasm.xWrap.FuncPtrAdapter.debugFuncInstall = false;
        T.assert( !capi.sqlite3_preupdate_hook(db, 0, 0) );
        db.close();
      }
    })/*pre-update hooks*/
  ;/*end hook API tests*/

  ////////////////////////////////////////////////////////////////////////
  T.g('Auto-extension API')
    .t({

          const exp = this.opfsDbExport;
          delete this.opfsDbExport;
          this.opfsImportSize = await sqlite3.oo1.OpfsDb.importDb(filename, exp);
          db = new sqlite3.oo1.OpfsDb(this.opfsDbFile);
          T.assert(6 === db.selectValue('select count(*) from p')).
            assert( this.opfsImportSize == exp.byteLength );
          db.close();
          this.opfsUnlink =
                (fn=filename)=>sqlite3.util.sqlite3__wasm_vfs_unlink("opfs",fn);
          this.opfsUnlink(filename);
          T.assert(!(await sqlite3.opfs.entryExists(filename)));
          // Try again with a function as an input source:
          let cursor = 0;
          const blockSize = 512, end = exp.byteLength;
          const reader = async function(){

        const P3b = await inst(conf2).then(u=>u3 = u).catch((e)=>cErr=e);
        T.assert(undefined === cErr)
          .assert(P3b === u3)
          .assert(P3b === await inst(conf2))
          .assert(true === await u3.removeVfs())
          .assert(false === await P3b.removeVfs());
      }
    }/*OPFS SAH Pool sanity checks*/);

  ////////////////////////////////////////////////////////////////////////
  T.g('Misc. APIs')
    .t('bind_parameter_...', function(sqlite3){
      const db = new sqlite3.oo1.DB();
      db.exec("create table t(a)");
      const stmt = db.prepare("insert into t(a) values($a)");
      T.assert( 1===capi.sqlite3_bind_parameter_count(stmt) )
        .assert( 1===capi.sqlite3_bind_parameter_index(stmt, "$a") )
        .assert( 0===capi.sqlite3_bind_parameter_index(stmt, ":a") )
        .assert( 1===stmt.getParamIndex("$a") )
        .assert( 0===stmt.getParamIndex(":a") )
        .assert( "$a"===capi.sqlite3_bind_parameter_name(stmt, 1) )
        .assert( null===capi.sqlite3_bind_parameter_name(stmt, 0) )
        .assert( "$a"===stmt.getParamName(1) )
        .assert( null===stmt.getParamName(0) );
      stmt.finalize();
      db.close();
    })

    /**
       Ensure that certain Stmt members throw when called
       via DB.exec().
    */
    .t('locked-by-exec() APIs', function(sqlite3){
      const db = new sqlite3.oo1.DB();
      db.exec("create table t(a);insert into t(a) values(1);");
      let checkCount = 0;
      const checkOp = function(op){
        ++checkCount;
        T.mustThrowMatching(() => {
          db.exec({
            sql: "select ?1",
            bind: op,
            callback: (row, stmt) => {
              switch (row[0]) {
                case 'bind': stmt.bind(1); break;
                case 'finalize':
                case 'clearBindings':
                case 'reset':
                case 'step': stmt[op](); break;
              }
            }
          });
        }, /^Operation is illegal when statement is locked.*/)
      };
      try{
        checkOp('bind');
        checkOp('finalize');
        checkOp('clearBindings');
        checkOp('reset');
        checkOp('step');
        T.assert(5===checkCount);
      }finally{
        db.close();
      }
    })

  ////////////////////////////////////////////////////////////////////
    .t("Misc. stmt_...", function(sqlite3){
      const db = new sqlite3.oo1.DB();
      db.exec("create table t(a doggiebiscuits); insert into t(a) values(123)");
      const stmt = db.prepare("select a, a+1 from t");
      T.assert( stmt.isReadOnly() )

        T.assert( 123===capi.sqlite3_value_int(sv) )
          .assert( "doggiebiscuits"===capi.sqlite3_column_decltype(stmt,0) )
          .assert( null===capi.sqlite3_column_decltype(stmt,1) );
      }
      T.assert( 1===n )
        .assert( 0===capi.sqlite3_stmt_busy(stmt) )
        .assert( !stmt.isBusy() );

      if( wasm.exports.sqlite3_column_origin_name ){
        log("Column metadata APIs enabled");
        T.assert( "t" === capi.sqlite3_column_table_name(stmt, 0))
          .assert("a" === capi.sqlite3_column_origin_name(stmt, 0))
          .assert("main" === capi.sqlite3_column_database_name(stmt, 0))
      }else{
        log("Column metadata APIs not enabled");
      } // column metadata APIs

      stmt.finalize();
      db.close();
    })

  ////////////////////////////////////////////////////////////////////
    .t("interrupt", function(sqlite3){
      const db = new sqlite3.oo1.DB();
      T.assert( 0===capi.sqlite3_is_interrupted(db) );
      capi.sqlite3_interrupt(db);
      T.assert( 0!==capi.sqlite3_is_interrupted(db) );
      db.close();
    });

  ////////////////////////////////////////////////////////////////////////
  T.g('Bug Reports')
    .t({
      name: 'Delete via bound parameter in subquery',
      predicate: ()=>wasm.compileOptionUsed('ENABLE_FTS5') || "Missing FTS5",
      test: function(sqlite3){
        // Testing https://sqlite.org/forum/forumpost/40ce55bdf5
        // with the exception that that post uses "external content"
        // for the FTS index.
        const db = new sqlite3.oo1.DB();//(':memory:','wt');
        db.exec([
          "create virtual table f using fts5 (path);",
          "insert into f(path) values('abc'),('def'),('ghi');"
        ]);
        const fetchEm = ()=> db.exec({
          sql: "SELECT * FROM f order by path",
          rowMode: 'array'
        });
        /*const dump = function(lbl){
          let rc = fetchEm();
          log((lbl ? (lbl+' results') : ''),rc);
        };*/
        //dump('Full fts table');
        let rc = fetchEm();
        T.assert(3===rc.length);
        db.exec(`
          delete from f where rowid in (
          select rowid from f where path = :path
           )`,

  $(TOP)/src/test_superlock.c \
  $(TOP)/src/test_syscall.c \
  $(TOP)/src/test_tclsh.c \
  $(TOP)/src/test_tclvar.c \
  $(TOP)/src/test_thread.c \
  $(TOP)/src/test_vdbecov.c \
  $(TOP)/src/test_vfs.c \

  $(TOP)/src/test_window.c \
  $(TOP)/src/test_wsd.c       \
  $(TOP)/ext/fts3/fts3_term.c \
  $(TOP)/ext/fts3/fts3_test.c  \
  $(TOP)/ext/session/test_session.c \
  $(TOP)/ext/recover/sqlite3recover.c \
  $(TOP)/ext/recover/dbdata.c \

# It took half an hour to figure that out.
#
T.tcl.env.sh = ./.tclenv.sh
$(T.tcl.env.sh): $(TCLSH_CMD) $(TCL_CONFIG_SH) $(MAKEFILE_LIST)
	@if [ x = "x$(TCL_CONFIG_SH)" ]; then \
		echo 'TCL_CONFIG_SH must be set to point to a "tclConfig.sh"' 1>&2; exit 1; \
	fi; \
	if [ x != "x$(TCLLIBDIR)" ]; then \
		echo "# generated by main.mk"; \
		echo TCLLIBDIR="$(TCLLIBDIR)"; \
	else \
		ld= ; \
		for d in `echo "puts stdout \\$$auto_path" | $(TCLSH_CMD)`; do \
			if [ -d "$$d" ]; then ld=$$d; break; fi; \
		done; \
		if [ x = "x$$ld" ]; then echo "Cannot determine TCLLIBDIR" 1>&2; exit 1; fi; \
		echo "# generated by main.mk"; \
		echo "TCLLIBDIR=$$ld/sqlite3$(PACKAGE_VERSION)"; \
	fi > $@; \
	echo ". \"$(TCL_CONFIG_SH)\" || exit \$$?" >> $@; \
	echo "Created $@"

#
# $(T.tcl.env.source) is shell code to be run as part of any
# compilation or link step which requires vars from

#
# Install C header files
#
install-headers: sqlite3.h $(install-dir.include)
	$(INSTALL.noexec) sqlite3.h "$(TOP)/src/sqlite3ext.h" "$(install-dir.include)"
install: install-headers

#
# If TCL_EXT_DLL_BASENAME is not set then guess the Tcl extension's
# DLL name depending on the Tcl version.  This does not account for
# Cygwin's naming - the canonical build will usually set it, but
# static makefiles importing this one will need to account for that on
# their own. They can do that by setting libtclsqlite3.basename-[89]
# to appropriate names (cygsqlite resp. cygtcl9sqlite).
#
TCL_MAJOR_VERSION ?= 0
libtclsqlite3.basename-8 ?= libsqlite
libtclsqlite3.basename-9 ?= libtcl9sqlite
TCL_EXT_DLL_BASENAME ?= $(libtclsqlite3.basename-$(TCL_MAJOR_VERSION))
libtclsqlite3.DLL ?= $(TCL_EXT_DLL_BASENAME)$(PACKAGE_VERSION)$(T.dll)

#
# libtclsqlite3...
#
pkgIndex.tcl: $(TOP)/main.mk
	echo 'package ifneeded sqlite3 $(PACKAGE_VERSION) [list load [file join $$dir $(libtclsqlite3.DLL)] Sqlite3]' > $@
pkgIndex.tcl-1: pkgIndex.tcl
pkgIndex.tcl-0 pkgIndex.tcl-:
tcl: pkgIndex.tcl-$(HAVE_TCL)

$(libtclsqlite3.DLL): $(T.tcl.env.sh) tclsqlite.o $(LIBOBJ)
	$(T.tcl.env.source); \
	$(T.link.shared) -o $@ tclsqlite.o \
		$$TCL_INCLUDE_SPEC $$TCL_STUB_LIB_SPEC $(LDFLAGS.libsqlite3) \
		$(LIBOBJ) -Wl,-rpath,$$TCLLIBDIR
# ^^^ that rpath bit is defined as TCL_LD_SEARCH_FLAGS in
# tclConfig.sh, but it's defined in such a way as to be useless for a

CFLAGS.tclextension = $(CFLAGS.intree_includes) $(CFLAGS.env) $(OPT_FEATURE_FLAGS) $(OPTS)
#
# Build the SQLite TCL extension in a way that make it compatible
# with whatever version of TCL is running as $TCLSH_CMD, possibly defined
# by --with-tclsh=
#
tclextension: tclsqlite3.c
	$(TCLSH_CMD) $(TOP)/tool/buildtclext.tcl --build-only \
		--tclConfig.sh $(TCL_CONFIG_SH) --cc "$(T.cc)" $(CFLAGS.tclextension)

#
# Install the SQLite TCL extension in a way that is appropriate for $TCLSH_CMD
# to find it.
#
tclextension-install: tclsqlite3.c
	$(TCLSH_CMD) $(TOP)/tool/buildtclext.tcl --destdir "$(DESTDIR)" \
		--tclConfig.sh $(TCL_CONFIG_SH) --cc "$(T.cc)" $(CFLAGS.tclextension)

#
# Uninstall the SQLite TCL extension that is used by $TCLSH_CMD.
#
tclextension-uninstall:
	$(TCLSH_CMD) $(TOP)/tool/buildtclext.tcl --uninstall \
		--tclConfig.sh $(TCL_CONFIG_SH)

#
# List all installed the SQLite TCL extensions that is are accessible
# by $TCLSH_CMD, including prior versions.
#
tclextension-list:
	@ $(TCLSH_CMD) $(TOP)/tool/buildtclext.tcl --info \
		--tclConfig.sh $(TCL_CONFIG_SH)

# Verify that the SQLite TCL extension that is loaded by default
# in $(TCLSH_CMD) is the same as the version of SQLite for the
# current source tree
#
tclextension-verify: sqlite3.h
	@ $(TCLSH_CMD) $(TOP)/tool/buildtclext.tcl --version-check \
		--tclConfig.sh $(TCL_CONFIG_SH)

# Run all of the tclextension targets in order, ending with uninstall.
tclextension-all:
	$(MAKE) tclextension
	$(MAKE) tclextension-install
	$(MAKE) tclextension-list
	$(MAKE) tclextension-verify
	$(MAKE) tclextension-uninstall

#
# FTS5 things
#
FTS5_SRC = \
   $(TOP)/ext/fts5/fts5.h \
   $(TOP)/ext/fts5/fts5Int.h \

	$(TCLSH_CMD) $(TOP)/test/testrunner.tcl mdevtest $(TSTRNNR_OPTS)

mdevtest: srctree-check has_tclsh85
	$(TCLSH_CMD) $(TOP)/test/testrunner.tcl mdevtest $(TSTRNNR_OPTS)

sdevtest: has_tclsh85
	$(TCLSH_CMD) $(TOP)/test/testrunner.tcl sdevtest $(TSTRNNR_OPTS)

# Like releasetest, except it omits srctree-check and verify-source so
# that it can be used on a modified source tree.
#
xdevtest: has_tclsh85
	$(TCLSH_CMD) $(TOP)/test/testrunner.tcl release $(TSTRNNR_OPTS)

#
# Validate that various generated files in the source tree
# are up-to-date.
#
srctree-check:	$(TOP)/tool/srctree-check.tcl
	$(TCLSH_CMD) $(TOP)/tool/srctree-check.tcl

    $(TOP)/ext/misc/regexp.c \
    $(TOP)/ext/misc/series.c \
    $(TOP)/ext/misc/sha1.c \
    $(TOP)/ext/misc/shathree.c \
    $(TOP)/ext/misc/sqlar.c \
    $(TOP)/ext/misc/uint.c \
    $(TOP)/ext/misc/vfstrace.c \
    $(TOP)/ext/misc/windirent.h \
    $(TOP)/ext/misc/zipfile.c \
    $(TOP)/ext/recover/dbdata.c \
    $(TOP)/ext/recover/sqlite3recover.c \
    $(TOP)/ext/recover/sqlite3recover.h



shell.c:	$(SHELL_DEP) $(TOP)/tool/mkshellc.tcl $(B.tclsh)
	$(B.tclsh) $(TOP)/tool/mkshellc.tcl shell.c

#
# Rules to build the extension objects.
#

                  /* For a BITVEC_SZ of 512, this would be 34,359,739. */
  union {
    BITVEC_TELEM aBitmap[BITVEC_NELEM];    /* Bitmap representation */
    u32 aHash[BITVEC_NINT];      /* Hash table representation */
    Bitvec *apSub[BITVEC_NPTR];  /* Recursive representation */
  } u;
};


/*
** Create a new bitmap object able to handle bits between 0 and iSize,
** inclusive.  Return a pointer to the new object.  Return NULL if
** malloc fails.
*/
Bitvec *sqlite3BitvecCreate(u32 iSize){

    int rc;
    u32 *aiValues = sqlite3StackAllocRaw(0, sizeof(p->u.aHash));
    if( aiValues==0 ){
      return SQLITE_NOMEM_BKPT;
    }else{
      memcpy(aiValues, p->u.aHash, sizeof(p->u.aHash));
      memset(p->u.apSub, 0, sizeof(p->u.apSub));
      p->iDivisor = p->iSize/BITVEC_NPTR;
      if( (p->iSize%BITVEC_NPTR)!=0 ) p->iDivisor++;
      if( p->iDivisor<BITVEC_NBIT ) p->iDivisor = BITVEC_NBIT;
      rc = sqlite3BitvecSet(p, i);
      for(j=0; j<BITVEC_NINT; j++){
        if( aiValues[j] ) rc |= sqlite3BitvecSet(p, aiValues[j]);
      }
      sqlite3StackFree(0, aiValues);
      return rc;
    }

/*
** Return the value of the iSize parameter specified when Bitvec *p
** was created.
*/
u32 sqlite3BitvecSize(Bitvec *p){
  return p->iSize;
}

#ifdef SQLITE_DEBUG
/*
** Show the content of a Bitvec option and its children.  Indent
** everything by n spaces.  Add x to each bitvec value.
**
** From a debugger such as gdb, one can type:
**
**    call sqlite3ShowBitvec(p)
**
** For some Bitvec p and see a recursive view of the Bitvec's content.
*/
static void showBitvec(Bitvec *p, int n, unsigned x){
  int i;
  if( p==0 ){
    printf("NULL\n");
    return;
  }
  printf("Bitvec 0x%p iSize=%u", p, p->iSize);
  if( p->iSize<=BITVEC_NBIT ){
    printf(" bitmap\n");
    printf("%*s   bits:", n, "");
    for(i=1; i<=BITVEC_NBIT; i++){
      if( sqlite3BitvecTest(p,i) ) printf(" %u", x+(unsigned)i);
    }
    printf("\n");
  }else if( p->iDivisor==0 ){
    printf(" hash with %u entries\n", p->nSet);
    printf("%*s   bits:", n, "");
    for(i=0; i<BITVEC_NINT; i++){
      if( p->u.aHash[i] ) printf(" %u", x+(unsigned)p->u.aHash[i]);
    }
    printf("\n");
  }else{
    printf(" sub-bitvec with iDivisor=%u\n", p->iDivisor);
    for(i=0; i<BITVEC_NPTR; i++){
      if( p->u.apSub[i]==0 ) continue;
      printf("%*s   apSub[%d]=", n, "", i);
      showBitvec(p->u.apSub[i], n+4, i*p->iDivisor);
    }
  }
}
void sqlite3ShowBitvec(Bitvec *p){
  showBitvec(p, 0, 0);
}
#endif

#ifndef SQLITE_UNTESTABLE
/*
** Let V[] be an array of unsigned characters sufficient to hold
** up to N bits.  Let I be an integer between 0 and N.  0<=I<N.
** Then the following macros can be used to set, clear, or test
** individual bits within V.
*/
#define SETBIT(V,I)      V[I>>3] |= (1<<(I&7))
#define CLEARBIT(V,I)    V[I>>3] &= ~(BITVEC_TELEM)(1<<(I&7))
#define TESTBIT(V,I)     (V[I>>3]&(1<<(I&7)))!=0


/*
** This routine runs an extensive test of the Bitvec code.
**
** The input is an array of integers that acts as a program
** to test the Bitvec.  The integers are opcodes followed
** by 0, 1, or 3 operands, depending on the opcode.  Another
** opcode follows immediately after the last operand.
**
** There are opcodes numbered starting with 0.  0 is the
** "halt" opcode and causes the test to end.
**
**    0          Halt and return the number of errors
**    1 N S X    Set N bits beginning with S and incrementing by X
**    2 N S X    Clear N bits beginning with S and incrementing by X
**    3 N        Set N randomly chosen bits
**    4 N        Clear N randomly chosen bits
**    5 N S X    Set N bits from S increment X in array only, not in bitvec
**    6          Invoice sqlite3ShowBitvec() on the Bitvec object so far
**    7 X        Show compile-time parameters and the hash of X         
**
** The opcodes 1 through 4 perform set and clear operations are performed
** on both a Bitvec object and on a linear array of bits obtained from malloc.
** Opcode 5 works on the linear array only, not on the Bitvec.
** Opcode 5 is used to deliberately induce a fault in order to
** confirm that error detection works.  Opcodes 6 and greater are
** state output opcodes.  Opcodes 6 and greater are no-ops unless
** SQLite has been compiled with SQLITE_DEBUG.
**
** At the conclusion of the test the linear array is compared
** against the Bitvec object.  If there are any differences,
** an error is returned.  If they are the same, zero is returned.
**
** If a memory allocation error occurs, return -1.
**
** sz is the size of the Bitvec.  Or if sz is negative, make the size
** 2*(unsigned)(-sz) and disabled the linear vector check.
*/
int sqlite3BitvecBuiltinTest(int sz, int *aOp){
  Bitvec *pBitvec = 0;
  unsigned char *pV = 0;
  int rc = -1;
  int i, nx, pc, op;
  void *pTmpSpace;

  /* Allocate the Bitvec to be tested and a linear array of
  ** bits to act as the reference */
  if( sz<=0 ){
    pBitvec = sqlite3BitvecCreate( 2*(unsigned)(-sz) );
    pV = 0;
  }else{
    pBitvec = sqlite3BitvecCreate( sz );
    pV = sqlite3MallocZero( (7+(i64)sz)/8 + 1 );
  }
  pTmpSpace = sqlite3_malloc64(BITVEC_SZ);
  if( pBitvec==0 || pTmpSpace==0 || (pV==0 && sz>0) ) goto bitvec_end;

  /* NULL pBitvec tests */
  sqlite3BitvecSet(0, 1);
  sqlite3BitvecClear(0, 1, pTmpSpace);

  /* Run the program */
  pc = i = 0;
  while( (op = aOp[pc])!=0 ){
    if( op>=6 ){
#ifdef SQLITE_DEBUG
      if( op==6 ){
        sqlite3ShowBitvec(pBitvec);
      }else if( op==7 ){
        printf("BITVEC_SZ     = %d (%d by sizeof)\n",
               BITVEC_SZ, (int)sizeof(Bitvec));
        printf("BITVEC_USIZE  = %d\n", (int)BITVEC_USIZE);
        printf("BITVEC_NELEM  = %d\n", (int)BITVEC_NELEM);
        printf("BITVEC_NBIT   = %d\n", (int)BITVEC_NBIT);
        printf("BITVEC_NINT   = %d\n", (int)BITVEC_NINT);
        printf("BITVEC_MXHASH = %d\n", (int)BITVEC_MXHASH);
        printf("BITVEC_NPTR   = %d\n", (int)BITVEC_NPTR);
      }
#endif
      pc++;
      continue;
    }
    switch( op ){
      case 1:
      case 2:
      case 5: {
        nx = 4;
        i = aOp[pc+2] - 1;
        aOp[pc+2] += aOp[pc+3];

        break;
      }
    }
    if( (--aOp[pc+1]) > 0 ) nx = 0;
    pc += nx;
    i = (i & 0x7fffffff)%sz;
    if( (op & 1)!=0 ){
      if( pV ) SETBIT(pV, (i+1));
      if( op!=5 ){
        if( sqlite3BitvecSet(pBitvec, i+1) ) goto bitvec_end;
      }
    }else{
      if( pV ) CLEARBIT(pV, (i+1));
      sqlite3BitvecClear(pBitvec, i+1, pTmpSpace);
    }
  }

  /* Test to make sure the linear array exactly matches the
  ** Bitvec object.  Start with the assumption that they do
  ** match (rc==0).  Change rc to non-zero if a discrepancy
  ** is found.
  */
  if( pV ){
    rc = sqlite3BitvecTest(0,0) + sqlite3BitvecTest(pBitvec, sz+1)
            + sqlite3BitvecTest(pBitvec, 0)
            + (sqlite3BitvecSize(pBitvec) - sz);
    for(i=1; i<=sz; i++){
      if( (TESTBIT(pV,i))!=sqlite3BitvecTest(pBitvec,i) ){
        rc = i;
        break;
      }
    }
  }else{
    rc = 0;
  }

  /* Free allocated structure */
bitvec_end:
  sqlite3_free(pTmpSpace);
  sqlite3_free(pV);
  sqlite3BitvecDestroy(pBitvec);
  return rc;
}
#endif /* SQLITE_UNTESTABLE */

  UnpackedRecord *pIdxKey;   /* Unpacked index key */

  if( pKey ){
    KeyInfo *pKeyInfo = pCur->pKeyInfo;
    assert( nKey==(i64)(int)nKey );
    pIdxKey = sqlite3VdbeAllocUnpackedRecord(pKeyInfo);
    if( pIdxKey==0 ) return SQLITE_NOMEM_BKPT;
    sqlite3VdbeRecordUnpack((int)nKey, pKey, pIdxKey);
    if( pIdxKey->nField==0 || pIdxKey->nField>pKeyInfo->nAllField ){
      rc = SQLITE_CORRUPT_BKPT;
    }else{
      rc = sqlite3BtreeIndexMoveto(pCur, pIdxKey, pRes);
    }
    sqlite3DbFree(pCur->pKeyInfo->db, pIdxKey);
  }else{

      sqlite3_mutex_free(pBt->mutex);
    }
    removed = 1;
  }
  sqlite3_mutex_leave(pMainMtx);
  return removed;
#else
  UNUSED_PARAMETER( pBt );
  return 1;
#endif
}

/*
** Make sure pBt->pTmpSpace points to an allocation of
** MX_CELL_SIZE(pBt) bytes with a 4-byte prefix for a left-child

  int rc = SQLITE_OK;
  int x;
  BtShared *pBt = p->pBt;
  assert( nReserve>=0 && nReserve<=255 );
  sqlite3BtreeEnter(p);
  pBt->nReserveWanted = (u8)nReserve;
  x = pBt->pageSize - pBt->usableSize;
  if( x==nReserve && (pageSize==0 || (u32)pageSize==pBt->pageSize) ){
    sqlite3BtreeLeave(p);
    return SQLITE_OK;
  }
  if( nReserve<x ) nReserve = x;
  if( pBt->btsFlags & BTS_PAGESIZE_FIXED ){
    sqlite3BtreeLeave(p);
    return SQLITE_READONLY;
  }
  assert( nReserve>=0 && nReserve<=255 );
  if( pageSize>=512 && pageSize<=SQLITE_MAX_PAGE_SIZE &&

      }
    }
 
    if( rc!=SQLITE_OK ){
      (void)sqlite3PagerWalWriteLock(pPager, 0);
      unlockBtreeIfUnused(pBt);
    }
#if defined(SQLITE_ENABLE_SETLK_TIMEOUT)
    if( rc==SQLITE_BUSY_TIMEOUT ){
      /* If a blocking lock timed out, break out of the loop here so that
      ** the busy-handler is not invoked.  */
      break;
    }
#endif
  }while( (rc&0xFF)==SQLITE_BUSY && pBt->inTransaction==TRANS_NONE &&
          btreeInvokeBusyHandler(pBt) );
  sqlite3PagerWalDb(pPager, 0);
#ifdef SQLITE_ENABLE_SETLK_TIMEOUT
  if( rc==SQLITE_BUSY_TIMEOUT ) rc = SQLITE_BUSY;
#endif

moveto_table_finish:
  pCur->info.nSize = 0;
  assert( (pCur->curFlags & BTCF_ValidOvfl)==0 );
  return rc;
}

/*
** Compare the "idx"-th cell on the page pPage against the key
** pointing to by pIdxKey using xRecordCompare.  Return negative or
** zero if the cell is less than or equal pIdxKey.  Return positive
** if unknown.
**
**    Return value negative:     Cell at pCur[idx] less than pIdxKey
**
**    Return value is zero:      Cell at pCur[idx] equals pIdxKey
**
**    Return value positive:     Nothing is known about the relationship
**                               of the cell at pCur[idx] and pIdxKey.
**
** This routine is part of an optimization.  It is always safe to return
** a positive value as that will cause the optimization to be skipped.
*/
static int indexCellCompare(
  MemPage *pPage,
  int idx,
  UnpackedRecord *pIdxKey,
  RecordCompare xRecordCompare
){

  int c;
  int nCell;  /* Size of the pCell cell in bytes */
  u8 *pCell = findCellPastPtr(pPage, idx);

  nCell = pCell[0];
  if( nCell<=pPage->max1bytePayload ){
    /* This branch runs if the record-size field of the cell is a

  */
  if( pCur->eState==CURSOR_VALID
   && pCur->pPage->leaf
   && cursorOnLastPage(pCur)
  ){
    int c;
    if( pCur->ix==pCur->pPage->nCell-1
     && (c = indexCellCompare(pCur->pPage,pCur->ix,pIdxKey,xRecordCompare))<=0
     && pIdxKey->errCode==SQLITE_OK
    ){
      *pRes = c;
      return SQLITE_OK;  /* Cursor already pointing at the correct spot */
    }
    if( pCur->iPage>0
     && indexCellCompare(pCur->pPage, 0, pIdxKey, xRecordCompare)<=0
     && pIdxKey->errCode==SQLITE_OK
    ){
      pCur->curFlags &= ~(BTCF_ValidOvfl|BTCF_AtLast);
      if( !pCur->pPage->isInit ){
        return SQLITE_CORRUPT_BKPT;
      }
      goto bypass_moveto_root;  /* Start search on the current page */

  ** opcode and the OP_Count opcode with P3=1.  In either case,
  ** the cursor will always be valid unless the btree is empty. */
  if( pCur->eState!=CURSOR_VALID ) return 0;
  if( NEVER(pCur->pPage->leaf==0) ) return -1;

  n = pCur->pPage->nCell;
  for(i=0; i<pCur->iPage; i++){
    n *= pCur->apPage[i]->nCell+1;
  }
  return n;
}

/*
** Advance the cursor to the next entry in the database.
** Return value:

  assert( apNew[nNew-1]!=0 );
  put4byte(pRight, apNew[nNew-1]->pgno);

  /* If the sibling pages are not leaves, ensure that the right-child pointer
  ** of the right-most new sibling page is set to the value that was
  ** originally in the same field of the right-most old sibling page. */
  if( (pageFlags & PTF_LEAF)==0 && nOld!=nNew ){
    MemPage *pOld;
    if( nNew>nOld ){
      pOld = apNew[nOld-1];
    }else{
      pOld = apOld[nOld-1];
    }
    memcpy(&apNew[nNew-1]->aData[8], &pOld->aData[8], 4);
  }

  /* Make any required updates to pointer map entries associated with
  ** cells stored on sibling pages following the balance operation. Pointer
  ** map entries associated with divider cells are set by the insertCell()
  ** routine. The associated pointer map entries are:

/*
** Return SQLITE_LOCKED_SHAREDCACHE if another user of the same shared
** btree as the argument handle holds an exclusive lock on the
** sqlite_schema table. Otherwise SQLITE_OK.
*/
int sqlite3BtreeSchemaLocked(Btree *p){
  int rc;
  UNUSED_PARAMETER(p);  /* only used in DEBUG builds */
  assert( sqlite3_mutex_held(p->db->mutex) );
  sqlite3BtreeEnter(p);
  rc = querySharedCacheTableLock(p, SCHEMA_ROOT, READ_LOCK);
  assert( rc==SQLITE_OK || rc==SQLITE_LOCKED_SHAREDCACHE );
  sqlite3BtreeLeave(p);
  return rc;
}

**     1     schema=main, pgno=?1
**     2     schema=?1, full table scan
**     3     schema=?1, pgno=?2
**
** idxStr is not used
*/
static int dbpageFilter(
  sqlite3_vtab_cursor *pCursor,
  int idxNum, const char *idxStr,
  int argc, sqlite3_value **argv
){
  DbpageCursor *pCsr = (DbpageCursor *)pCursor;
  DbpageTable *pTab = (DbpageTable *)pCursor->pVtab;
  int rc;
  sqlite3 *db = pTab->db;
  Btree *pBt;

  UNUSED_PARAMETER(idxStr);
  UNUSED_PARAMETER(argc);

  /* Default setting is no rows of result */
  pCsr->pgno = 1;
  pCsr->mxPgno = 0;

  if( idxNum & 2 ){
    const char *zSchema;
    assert( argc>=1 );
    zSchema = (const char*)sqlite3_value_text(argv[0]);
    pCsr->iDb = sqlite3FindDbName(db, zSchema);

  }
  if( pCsr->pPage1 ) sqlite3PagerUnrefPageOne(pCsr->pPage1);
  rc = sqlite3PagerGet(pCsr->pPager, 1, &pCsr->pPage1, 0);
  return rc;
}

static int dbpageColumn(
  sqlite3_vtab_cursor *pCursor,
  sqlite3_context *ctx,
  int i
){
  DbpageCursor *pCsr = (DbpageCursor *)pCursor;
  int rc = SQLITE_OK;
  switch( i ){
    case 0: {           /* pgno */
      sqlite3_result_int(ctx, pCsr->pgno);

      assert( pExpr->iColumn < pExpr->iTable );
      assert( pExpr->iColumn >= 0 );
      assert( pExpr->iTable==pExpr->pLeft->x.pSelect->pEList->nExpr );
      return sqlite3ExprAffinity(
          pExpr->pLeft->x.pSelect->pEList->a[pExpr->iColumn].pExpr
      );
    }
    if( op==TK_VECTOR
     || (op==TK_FUNCTION && pExpr->affExpr==SQLITE_AFF_DEFER)
    ){
      assert( ExprUseXList(pExpr) );
      return sqlite3ExprAffinity(pExpr->x.pList->a[0].pExpr);
    }
    if( ExprHasProperty(pExpr, EP_Skip|EP_IfNullRow) ){
      assert( pExpr->op==TK_COLLATE
           || pExpr->op==TK_IF_NULL_ROW
           || (pExpr->op==TK_REGISTER && pExpr->op2==TK_IF_NULL_ROW) );

      }
      break;
    }
    if( op==TK_CAST || op==TK_UPLUS ){
      p = p->pLeft;
      continue;
    }
    if( op==TK_VECTOR
     || (op==TK_FUNCTION && p->affExpr==SQLITE_AFF_DEFER)
    ){
      assert( ExprUseXList(p) );
      p = p->x.pList->a[0].pExpr;
      continue;
    }
    if( op==TK_COLLATE ){
      assert( !ExprHasProperty(p, EP_IntValue) );
      pColl = sqlite3GetCollSeq(pParse, ENC(db), 0, p->u.zToken);

  assert( pParse->iSelfTab!=0 );
  if( pParse->iSelfTab>0 ){
    iAddr = sqlite3VdbeAddOp3(v, OP_IfNullRow, pParse->iSelfTab-1, 0, regOut);
  }else{
    iAddr = 0;
  }
  sqlite3ExprCodeCopy(pParse, sqlite3ColumnExpr(pTab,pCol), regOut);
  if( (pCol->colFlags & COLFLAG_VIRTUAL)!=0
   && (pTab->tabFlags & TF_Strict)!=0
  ){
    int p3 = 2+(int)(pCol - pTab->aCol);
    sqlite3VdbeAddOp4(v, OP_TypeCheck, regOut, 1, p3, (char*)pTab, P4_TABLE);
  }else if( pCol->affinity>=SQLITE_AFF_TEXT ){
    sqlite3VdbeAddOp4(v, OP_Affinity, regOut, 1, 0, &pCol->affinity, 1);
  }
  if( iAddr ) sqlite3VdbeJumpHere(v, iAddr);
  if( pParse->nErr>nErr ) pParse->db->errByteOffset = -1;
}
#endif /* SQLITE_OMIT_GENERATED_COLUMNS */

static void findOrCreateAggInfoColumn(
  Parse *pParse,       /* Parsing context */
  AggInfo *pAggInfo,   /* The AggInfo object to search and/or modify */
  Expr *pExpr          /* Expr describing the column to find or insert */
){
  struct AggInfo_col *pCol;
  int k;
  int mxTerm = pParse->db->aLimit[SQLITE_LIMIT_COLUMN];

  assert( mxTerm <= SMXV(i16) );
  assert( pAggInfo->iFirstReg==0 );
  pCol = pAggInfo->aCol;
  for(k=0; k<pAggInfo->nColumn; k++, pCol++){
    if( pCol->pCExpr==pExpr ) return;
    if( pCol->iTable==pExpr->iTable
     && pCol->iColumn==pExpr->iColumn
     && pExpr->op!=TK_IF_NULL_ROW
    ){
      goto fix_up_expr;
    }
  }
  k = addAggInfoColumn(pParse->db, pAggInfo);
  if( k<0 ){
    /* OOM on resize */
    assert( pParse->db->mallocFailed );
    return;
  }
  if( k>mxTerm ){
    sqlite3ErrorMsg(pParse, "more than %d aggregate terms", mxTerm);
    k = mxTerm;
  }
  pCol = &pAggInfo->aCol[k];
  assert( ExprUseYTab(pExpr) );
  pCol->pTab = pExpr->y.pTab;
  pCol->iTable = pExpr->iTable;
  pCol->iColumn = pExpr->iColumn;
  pCol->iSorterColumn = -1;

fix_up_expr:
  ExprSetVVAProperty(pExpr, EP_NoReduce);
  assert( pExpr->pAggInfo==0 || pExpr->pAggInfo==pAggInfo );
  pExpr->pAggInfo = pAggInfo;
  if( pExpr->op==TK_COLUMN ){
    pExpr->op = TK_AGG_COLUMN;
  }
  assert( k <= SMXV(pExpr->iAgg) );
  pExpr->iAgg = (i16)k;
}

/*
** This is the xExprCallback for a tree walker.  It is used to
** implement sqlite3ExprAnalyzeAggregates().  See sqlite3ExprAnalyzeAggregates
** for additional information.

       && pWalker->walkerDepth==pExpr->op2
       && pExpr->pAggInfo==0
      ){
        /* Check to see if pExpr is a duplicate of another aggregate
        ** function that is already in the pAggInfo structure
        */
        struct AggInfo_func *pItem = pAggInfo->aFunc;
        int mxTerm = pParse->db->aLimit[SQLITE_LIMIT_COLUMN];
        assert( mxTerm <= SMXV(i16) );
        for(i=0; i<pAggInfo->nFunc; i++, pItem++){
          if( NEVER(pItem->pFExpr==pExpr) ) break;
          if( sqlite3ExprCompare(0, pItem->pFExpr, pExpr, -1)==0 ){
            break;
          }
        }
        if( i>mxTerm ){
          sqlite3ErrorMsg(pParse, "more than %d aggregate terms", mxTerm);
          i = mxTerm;
          assert( i<pAggInfo->nFunc );
        }else if( i>=pAggInfo->nFunc ){
          /* pExpr is original.  Make a new entry in pAggInfo->aFunc[]
          */
          u8 enc = ENC(pParse->db);
          i = addAggInfoFunc(pParse->db, pAggInfo);
          if( i>=0 ){
            int nArg;
            assert( !ExprHasProperty(pExpr, EP_xIsSelect) );

            }
          }
        }
        /* Make pExpr point to the appropriate pAggInfo->aFunc[] entry
        */
        assert( !ExprHasProperty(pExpr, EP_TokenOnly|EP_Reduced) );
        ExprSetVVAProperty(pExpr, EP_NoReduce);
        assert( i <= SMXV(pExpr->iAgg) );
        pExpr->iAgg = (i16)i;
        pExpr->pAggInfo = pAggInfo;
        return WRC_Prune;
      }else{
        return WRC_Continue;
      }
    }

static void concatFuncCore(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv,
  int nSep,
  const char *zSep
){
  i64 j, n = 0;
  int i;
  char *z;
  for(i=0; i<argc; i++){
    n += sqlite3_value_bytes(argv[i]);
  }
  n += (argc-1)*(i64)nSep;
  z = sqlite3_malloc64(n+1);
  if( z==0 ){
    sqlite3_result_error_nomem(context);
    return;
  }
  j = 0;
  for(i=0; i<argc; i++){
    if( sqlite3_value_type(argv[i])!=SQLITE_NULL ){
      int k = sqlite3_value_bytes(argv[i]);

      const char *v = (const char*)sqlite3_value_text(argv[i]);
      if( v!=0 ){
        if( j>0 && nSep>0 ){
          memcpy(&z[j], zSep, nSep);
          j += nSep;
        }
        memcpy(&z[j], v, k);

  char *zColAff;
  if( pTab->tabFlags & TF_Strict ){
    if( iReg==0 ){
      /* Move the previous opcode (which should be OP_MakeRecord) forward
      ** by one slot and insert a new OP_TypeCheck where the current
      ** OP_MakeRecord is found */
      VdbeOp *pPrev;
      int p3;
      sqlite3VdbeAppendP4(v, pTab, P4_TABLE);
      pPrev = sqlite3VdbeGetLastOp(v);
      assert( pPrev!=0 );
      assert( pPrev->opcode==OP_MakeRecord || sqlite3VdbeDb(v)->mallocFailed );
      pPrev->opcode = OP_TypeCheck;
      p3 = pPrev->p3;
      pPrev->p3 = 0;
      sqlite3VdbeAddOp3(v, OP_MakeRecord, pPrev->p1, pPrev->p2, p3);
    }else{
      /* Insert an isolated OP_Typecheck */
      sqlite3VdbeAddOp2(v, OP_TypeCheck, iReg, pTab->nNVCol);
      sqlite3VdbeAppendP4(v, pTab, P4_TABLE);
    }
    return;
  }

  szType = a[0]>>4;
  if( szType<=11 ){
    nExtra = 0;
  }else if( szType==12 ){
    nExtra = 1;
  }else if( szType==13 ){
    nExtra = 2;
  }else if( szType==14 ){
    nExtra = 4;
  }else{
    nExtra = 8;
  }
  if( szPayload<=11 ){
    nNeeded = 0;
  }else if( szPayload<=0xff ){
    nNeeded = 1;
  }else if( szPayload<=0xffff ){
    nNeeded = 2;

  int bBOC = ((flags & SQLITE_SETLK_BLOCK_ON_CONNECT) ? 1 : 0);
#endif
#ifdef SQLITE_ENABLE_API_ARMOR
  if( !sqlite3SafetyCheckOk(db) ) return SQLITE_MISUSE_BKPT;
#endif
  if( ms<-1 ) return SQLITE_RANGE;
#ifdef SQLITE_ENABLE_SETLK_TIMEOUT
  sqlite3_mutex_enter(db->mutex);
  db->setlkTimeout = ms;
  db->setlkFlags = flags;
  sqlite3BtreeEnterAll(db);
  for(iDb=0; iDb<db->nDb; iDb++){
    Btree *pBt = db->aDb[iDb].pBt;
    if( pBt ){
      sqlite3_file *fd = sqlite3PagerFile(sqlite3BtreePager(pBt));
      sqlite3OsFileControlHint(fd, SQLITE_FCNTL_BLOCK_ON_CONNECT, (void*)&bBOC);
    }
  }
  sqlite3BtreeLeaveAll(db);
  sqlite3_mutex_leave(db->mutex);
#endif
#if !defined(SQLITE_ENABLE_API_ARMOR) && !defined(SQLITE_ENABLE_SETLK_TIMEOUT)
  UNUSED_PARAMETER(db);
  UNUSED_PARAMETER(flags);
#endif
  return SQLITE_OK;
}

  assert( n==1 || (flags & SQLITE_SHM_EXCLUSIVE)!=0 );
  assert( pShmNode->hShm>=0 || pDbFd->pInode->bProcessLock==1 );
  assert( pShmNode->hShm<0 || pDbFd->pInode->bProcessLock==0 );

  /* Check that, if this to be a blocking lock, no locks that occur later
  ** in the following list than the lock being obtained are already held:
  **
  **   1. Recovery lock (ofst==2).
  **   2. Checkpointer lock (ofst==1).
  **   3. Write lock (ofst==0).
  **   4. Read locks (ofst>=3 && ofst<SQLITE_SHM_NLOCK).
  **
  ** In other words, if this is a blocking lock, none of the locks that
  ** occur later in the above list than the lock being obtained may be
  ** held.


  */
#if defined(SQLITE_ENABLE_SETLK_TIMEOUT) && defined(SQLITE_DEBUG)
  {
    u16 lockMask = (p->exclMask|p->sharedMask);
    assert( (flags & SQLITE_SHM_UNLOCK) || pDbFd->iBusyTimeout==0 || (
          (ofst!=2 || lockMask==0)
       && (ofst!=1 || lockMask==0 || lockMask==2)
       && (ofst!=0 || lockMask<3)
       && (ofst<3  || lockMask<(1<<ofst))
    ));
  }
#endif

    */
    if( !ret && GetLastError()==ERROR_IO_PENDING ){
      DWORD nDelay = (nMs==0 ? INFINITE : nMs);
      DWORD res = osWaitForSingleObject(ovlp.hEvent, nDelay);
      if( res==WAIT_OBJECT_0 ){
        ret = TRUE;
      }else if( res==WAIT_TIMEOUT ){
#if SQLITE_ENABLE_SETLK_TIMEOUT==1
        rc = SQLITE_BUSY_TIMEOUT;
#else
        rc = SQLITE_BUSY;
#endif
      }else{
        /* Some other error has occurred */
        rc = SQLITE_IOERR_LOCK;
      }

      /* If it is still pending, cancel the LockFileEx() call. */
      osCancelIo(hFile);

       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_SHARED)
       || flags==(SQLITE_SHM_UNLOCK | SQLITE_SHM_EXCLUSIVE) );
  assert( n==1 || (flags & SQLITE_SHM_EXCLUSIVE)!=0 );

  /* Check that, if this to be a blocking lock, no locks that occur later
  ** in the following list than the lock being obtained are already held:
  **
  **   1. Recovery lock (ofst==2).
  **   2. Checkpointer lock (ofst==1).
  **   3. Write lock (ofst==0).
  **   4. Read locks (ofst>=3 && ofst<SQLITE_SHM_NLOCK).
  **
  ** In other words, if this is a blocking lock, none of the locks that
  ** occur later in the above list than the lock being obtained may be
  ** held.


  */
#if defined(SQLITE_ENABLE_SETLK_TIMEOUT) && defined(SQLITE_DEBUG)
  {
    u16 lockMask = (p->exclMask|p->sharedMask);
    assert( (flags & SQLITE_SHM_UNLOCK) || pDbFd->iBusyTimeout==0 || (
          (ofst!=2 || lockMask==0)
       && (ofst!=1 || lockMask==0 || lockMask==2)
       && (ofst!=0 || lockMask<3)
       && (ofst<3  || lockMask<(1<<ofst))
    ));
  }
#endif

  int (*xGet)(Pager*,Pgno,DbPage**,int); /* Routine to fetch a patch */
  char *pTmpSpace;            /* Pager.pageSize bytes of space for tmp use */
  PCache *pPCache;            /* Pointer to page cache object */
#ifndef SQLITE_OMIT_WAL
  Wal *pWal;                  /* Write-ahead log used by "journal_mode=wal" */
  char *zWal;                 /* File name for write-ahead log */
#endif
#ifdef SQLITE_ENABLE_SETLK_TIMEOUT
  sqlite3 *dbWal;
#endif
};

/*
** Indexes for use with Pager.aStat[]. The Pager.aStat[] array contains
** the values accessed by passing SQLITE_DBSTATUS_CACHE_HIT, CACHE_MISS
** or CACHE_WRITE to sqlite3_db_status().
*/

  ** (e.g. due to malloc() failure), return an error code.
  */
  if( rc==SQLITE_OK ){
    rc = sqlite3WalOpen(pPager->pVfs,
        pPager->fd, pPager->zWal, pPager->exclusiveMode,
        pPager->journalSizeLimit, &pPager->pWal
    );
#ifdef SQLITE_ENABLE_SETLK_TIMEOUT
    if( rc==SQLITE_OK ){
      sqlite3WalDb(pPager->pWal, pPager->dbWal);
    }
#endif
  }
  pagerFixMaplimit(pPager);

  return rc;
}

}

/*
** Set the database handle used by the wal layer to determine if
** blocking locks are required.
*/
void sqlite3PagerWalDb(Pager *pPager, sqlite3 *db){
  pPager->dbWal = db;
  if( pagerUseWal(pPager) ){
    sqlite3WalDb(pPager->pWal, db);
  }
}
#endif

#ifdef SQLITE_ENABLE_SNAPSHOT

              longvalue = va_arg(ap,unsigned long int);
            }
          }else{
            longvalue = va_arg(ap,unsigned int);
          }
          prefix = 0;
        }

#if WHERETRACE_ENABLED
        if( xtype==etPOINTER && sqlite3WhereTrace & 0x100000 ) longvalue = 0;
#endif
#if TREETRACE_ENABLED
        if( xtype==etPOINTER && sqlite3TreeTrace & 0x100000 ) longvalue = 0;
#endif

        if( longvalue==0 ) flag_alternateform = 0;
        if( flag_zeropad && precision<width-(prefix!=0) ){
          precision = width-(prefix!=0);
        }
        if( precision<etBUFSIZE-10-etBUFSIZE/3 ){
          nOut = etBUFSIZE;
          zOut = buf;

        ){
          sqlite3ErrorMsg(pParse, "cannot join using column %s - column "
            "not present in both tables", zName);
          return 1;
        }
        pE1 = sqlite3CreateColumnExpr(db, pSrc, iLeft, iLeftCol);
        sqlite3SrcItemColumnUsed(&pSrc->a[iLeft], iLeftCol);
        if( (pSrc->a[0].fg.jointype & JT_LTORJ)!=0 && pParse->nErr==0 ){
          /* This branch runs if the query contains one or more RIGHT or FULL
          ** JOINs.  If only a single table on the left side of this join
          ** contains the zName column, then this branch is a no-op.
          ** But if there are two or more tables on the left side
          ** of the join, construct a coalesce() function that gathers all
          ** such tables.  Raise an error if more than one of those references
          ** to zName is not also within a prior USING clause.
          **
          ** We really ought to raise an error if there are two or more
          ** non-USING references to zName on the left of an INNER or LEFT
          ** JOIN.  But older versions of SQLite do not do that, so we avoid
          ** adding a new error so as to not break legacy applications.
          */
          ExprList *pFuncArgs = 0;   /* Arguments to the coalesce() */
          static const Token tkCoalesce = { "coalesce", 8 };
          assert( pE1!=0 );
          ExprSetProperty(pE1, EP_CanBeNull);
          while( tableAndColumnIndex(pSrc, iLeft+1, i, zName, &iLeft, &iLeftCol,
                                     pRight->fg.isSynthUsing)!=0 ){
            if( pSrc->a[iLeft].fg.isUsing==0
             || sqlite3IdListIndex(pSrc->a[iLeft].u3.pUsing, zName)<0
            ){
              sqlite3ErrorMsg(pParse, "ambiguous reference to %s in USING()",
                              zName);
              break;
            }
            pFuncArgs = sqlite3ExprListAppend(pParse, pFuncArgs, pE1);
            pE1 = sqlite3CreateColumnExpr(db, pSrc, iLeft, iLeftCol);
            sqlite3SrcItemColumnUsed(&pSrc->a[iLeft], iLeftCol);
          }
          if( pFuncArgs ){
            pFuncArgs = sqlite3ExprListAppend(pParse, pFuncArgs, pE1);
            pE1 = sqlite3ExprFunction(pParse, pFuncArgs, &tkCoalesce, 0);
            if( pE1 ){
              pE1->affExpr = SQLITE_AFF_DEFER;
            }
          }
        }else if( (pSrc->a[i+1].fg.jointype & JT_LEFT)!=0 && pParse->nErr==0 ){
          assert( pE1!=0 );
          ExprSetProperty(pE1, EP_CanBeNull);
        }
        pE2 = sqlite3CreateColumnExpr(db, pSrc, i+1, iRightCol);
        sqlite3SrcItemColumnUsed(pRight, iRightCol);
        pEq = sqlite3PExpr(pParse, TK_EQ, pE1, pE2);
        assert( pE2!=0 || pEq==0 );
        if( pEq ){
          ExprSetProperty(pEq, joinType);

    sqlite3VdbeSetColName(v, i, COLNAME_TABLE, zOrigTab, SQLITE_TRANSIENT);
    sqlite3VdbeSetColName(v, i, COLNAME_COLUMN, zOrigCol, SQLITE_TRANSIENT);
#else
    zType = columnType(&sNC, p, 0, 0, 0);
#endif
    sqlite3VdbeSetColName(v, i, COLNAME_DECLTYPE, zType, SQLITE_TRANSIENT);
  }
#else
  UNUSED_PARAMETER(pParse);
  UNUSED_PARAMETER(pTabList);
  UNUSED_PARAMETER(pEList);
#endif /* !defined(SQLITE_OMIT_DECLTYPE) */
}


/*
** Compute the column names for a SELECT statement.
**

**        (2a) the outer query must not be a join and
**        (2b) the outer query must not use subqueries
**             other than the one FROM-clause subquery that is a candidate
**             for flattening.  (This is due to ticket [2f7170d73bf9abf80]
**             from 2015-02-09.)
**
**   (3)  If the subquery is the right operand of a LEFT JOIN then
**        (3a) the subquery may not be a join
**        (**) Was (3b): "the FROM clause of the subquery may not contain
**             a virtual table"
**        (**) Was: "The outer query may not have a GROUP BY." This case
**             is now managed correctly
**        (3d) the outer query may not be DISTINCT.
**        See also (26) for restrictions on RIGHT JOIN.
**
**   (4)  The subquery can not be DISTINCT.
**

  **
  ** which is not at all the same thing.
  **
  ** See also tickets #306, #350, and #3300.
  */
  if( (pSubitem->fg.jointype & (JT_OUTER|JT_LTORJ))!=0 ){
    if( pSubSrc->nSrc>1                        /* (3a) */
     /**** || IsVirtual(pSubSrc->a[0].pSTab)      (3b)-omitted */
     || (p->selFlags & SF_Distinct)!=0         /* (3d) */
     || (pSubitem->fg.jointype & JT_RIGHT)!=0  /* (26) */
    ){
      return 0;
    }
    isOuterJoin = 1;
  }

  const char *z2 = z;
  while( *z2 ){ z2++; }
  return 0x3fffffff & (int)(z2 - z);
}

/*
** Return the length of a string in characters.  Multibyte UTF8 characters
** count as a single character for single-width characters, or as two
** characters for double-width characters.
*/
static int strlenChar(const char *z){
  int n = 0;
  while( *z ){
    if( (0x80&z[0])==0 ){
      n++;
      z++;
    }else{
      int u = 0;
      int len = decodeUtf8((const u8*)z, &u);
      z += len;
      n += cli_wcwidth(u);
    }
  }
  return n;
}

/*
** Return open FILE * if zFile exists, can be opened for read
** and is an ordinary file or a character stream source.

** below by the ../tool/mkshellc.tcl script.  Before processing that included
** code, we need to override some macros to make the included program code
** work here in the middle of this regular program.
*/
#define SQLITE_EXTENSION_INIT1
#define SQLITE_EXTENSION_INIT2(X) (void)(X)


INCLUDE ../ext/misc/windirent.h



INCLUDE ../ext/misc/memtrace.c
INCLUDE ../ext/misc/pcachetrace.c
INCLUDE ../ext/misc/shathree.c
INCLUDE ../ext/misc/sha1.c
INCLUDE ../ext/misc/uint.c
INCLUDE ../ext/misc/decimal.c
INCLUDE ../ext/misc/percentile.c

    }
    open_db(p, 0);
    rc = sqlite3_exec(p->db,
       "SELECT sql FROM"
       "  (SELECT sql sql, type type, tbl_name tbl_name, name name, rowid x"
       "     FROM sqlite_schema UNION ALL"
       "   SELECT sql, type, tbl_name, name, rowid FROM sqlite_temp_schema) "
       "WHERE type!='meta' AND sql NOTNULL"
       "  AND name NOT LIKE 'sqlite__%' ESCAPE '_' "
       "ORDER BY x",
       callback, &data, 0
    );
    if( rc==SQLITE_OK ){
      sqlite3_stmt *pStmt;
      rc = sqlite3_prepare_v2(p->db,
               "SELECT rowid FROM sqlite_schema"

        if( !bGlob ){
          appendText(&sSelect, " ESCAPE '\\' ", 0);
        }
        appendText(&sSelect, " AND ", 0);
        sqlite3_free(zQarg);
      }
      if( bNoSystemTabs ){
        appendText(&sSelect, "name NOT LIKE 'sqlite__%%' ESCAPE '_' AND ", 0);
      }
      appendText(&sSelect, "sql IS NOT NULL"
                           " ORDER BY snum, rowid", 0);
      if( bDebug ){
        sqlite3_fprintf(p->out, "SQL: %s;\n", sSelect.z);
      }else{
        rc = sqlite3_exec(p->db, sSelect.z, callback, &data, &zErrMsg);

      zSql = "SELECT lower(name) as tname FROM sqlite_schema"
             " WHERE type='table' AND coalesce(rootpage,0)>1"
             " UNION ALL SELECT 'sqlite_schema'"
             " ORDER BY 1 collate nocase";
    }else{
      zSql = "SELECT lower(name) as tname FROM sqlite_schema"
             " WHERE type='table' AND coalesce(rootpage,0)>1"
             " AND name NOT LIKE 'sqlite__%' ESCAPE '_'"
             " ORDER BY 1 collate nocase";
    }
    sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, 0);
    initText(&sQuery);
    initText(&sSql);
    appendText(&sSql, "WITH [sha3sum$query](a,b) AS(",0);
    zSep = "VALUES(";

    }
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && !defined(SQLITE_OMIT_VIRTUALTABLE)
    {
      int lrc;
      char *zRevText = /* Query for reversible to-blob-to-text check */
        "SELECT lower(name) as tname FROM sqlite_schema\n"
        "WHERE type='table' AND coalesce(rootpage,0)>1\n"
        "AND name NOT LIKE 'sqlite__%%' ESCAPE '_'%s\n"
        "ORDER BY 1 collate nocase";
      zRevText = sqlite3_mprintf(zRevText, zLike? " AND name LIKE $tspec" : "");
      zRevText = sqlite3_mprintf(
          /* lower-case query is first run, producing upper-case query. */
          "with tabcols as materialized(\n"
          "select tname, cname\n"
          "from ("

        appendText(&s, zDbName, '\'');
        appendText(&s, "||'.'||name FROM ", 0);
      }
      appendText(&s, zDbName, '"');
      appendText(&s, ".sqlite_schema ", 0);
      if( c=='t' ){
        appendText(&s," WHERE type IN ('table','view')"
                      "   AND name NOT LIKE 'sqlite__%' ESCAPE '_'"
                      "   AND name LIKE ?1", 0);
      }else{
        appendText(&s," WHERE type='index'"
                      "   AND tbl_name LIKE ?1", 0);
      }
    }
    rc = sqlite3_finalize(pStmt);

       int ctrlCode;            /* Integer code for that option */
       int unSafe;              /* Not valid unless --unsafe-testing */
       const char *zUsage;      /* Usage notes */
    } aCtrl[] = {
    {"always",             SQLITE_TESTCTRL_ALWAYS, 1,     "BOOLEAN"         },
    {"assert",             SQLITE_TESTCTRL_ASSERT, 1,     "BOOLEAN"         },
  /*{"benign_malloc_hooks",SQLITE_TESTCTRL_BENIGN_MALLOC_HOOKS,1, ""        },*/
    {"bitvec_test",        SQLITE_TESTCTRL_BITVEC_TEST, 1, "SIZE INT-ARRAY"},
    {"byteorder",          SQLITE_TESTCTRL_BYTEORDER, 0,  ""                },
    {"extra_schema_checks",SQLITE_TESTCTRL_EXTRA_SCHEMA_CHECKS,0,"BOOLEAN"  },
    {"fault_install",      SQLITE_TESTCTRL_FAULT_INSTALL, 1,"args..."       },
    {"fk_no_action",       SQLITE_TESTCTRL_FK_NO_ACTION, 0, "BOOLEAN"       },
    {"imposter",         SQLITE_TESTCTRL_IMPOSTER,1,"SCHEMA ON/OFF ROOTPAGE"},
    {"internal_functions", SQLITE_TESTCTRL_INTERNAL_FUNCTIONS,0,""          },
    {"json_selfcheck",     SQLITE_TESTCTRL_JSON_SELFCHECK ,0,"BOOLEAN"      },

            isOk = 1;
          }else{
            rc2 = booleanValue(azArg[2]);
            isOk = 3;
          }
          sqlite3_test_control(testctrl, &rc2);
          break;
        case SQLITE_TESTCTRL_BITVEC_TEST: {
          /* Examples:
          **   .testctrl bitvec_test 100   6,1       -- Show BITVEC constants
          **   .testctrl bitvec_test 1000  1,12,7,3  -- Simple test
          **                         ----  --------
          **      size of Bitvec -----^        ^---  aOp array. 0 added at end.
          **
          ** See comments on sqlite3BitvecBuiltinTest() for more information
          ** about the aOp[] array.
          */
          int iSize;
          const char *zTestArg;
          int nOp;
          int ii, jj, x;
          int *aOp;
          if( nArg!=4 ){
            sqlite3_fprintf(stderr,
              "ERROR - should be:  \".testctrl bitvec_test SIZE  INT-ARRAY\"\n"
            );
            rc = 1;
            goto meta_command_exit;
          }
          isOk = 3;
          iSize = (int)integerValue(azArg[2]);
          zTestArg = azArg[3];
          nOp = (int)strlen(zTestArg)+1;
          aOp = malloc( sizeof(int)*(nOp+1) );
          shell_check_oom(aOp);
          memset(aOp, 0, sizeof(int)*(nOp+1) );
          for(ii = jj = x = 0; zTestArg[ii]!=0; ii++){
            if( IsDigit(zTestArg[ii]) ){
              x = x*10 + zTestArg[ii] - '0';
            }else{
              aOp[jj++] = x;
              x = 0;
            }
          }
          aOp[jj] = x;
          x = sqlite3_test_control(testctrl, iSize, aOp);
          sqlite3_fprintf(p->out, "result: %d\n", x);
          free(aOp);
          break;
        }
        case SQLITE_TESTCTRL_FAULT_INSTALL: {
          int kk;
          int bShowHelp = nArg<=2;
          isOk = 3;
          for(kk=2; kk<nArg; kk++){
            const char *z = azArg[kk];
            if( z[0]=='-' && z[1]=='-' ) z++;