SQLite

**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.381 2007/08/16 10:09:03 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** The version of the library

  return sqlite3ApiExit(0, SQLITE_OK);
}
#endif

/*
** This is a convenience routine that makes sure that all thread-specific
** data for this thread has been deallocated.



*/
void sqlite3_thread_cleanup(void){
  ThreadData *pTd = sqlite3OsThreadSpecificData(0);
  if( pTd ){
    memset(pTd, 0, sizeof(*pTd));
    sqlite3OsThreadSpecificData(-1);
  }
}

/*
** Return meta information about a specific column of a database table.
** See comment in sqlite3.h (sqlite.h.in) for details.
*/
#ifdef SQLITE_ENABLE_COLUMN_METADATA

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains the C functions that implement a memory
** allocation subsystem for use by SQLite.  
**
** $Id: mem1.c,v 1.3 2007/08/15 20:41:29 drh Exp $
*/

/*
** This version of the memory allocator is the default.  It is
** used when no other memory allocator is specified using compile-time
** macros.
*/

/*
** Return the amount of memory currently checked out.
*/
sqlite3_uint64 sqlite3_memory_used(void){
  sqlite3_uint64 n;
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(1);
  }
  sqlite3_mutex_enter(mem.mutex, 1);
  n = mem.nowUsed;
  sqlite3_mutex_leave(mem.mutex);  
  return n;
}

/*
** Return the maximum amount of memory that has ever been
** checked out since either the beginning of this process
** or since the most recent reset.
*/
sqlite3_uint64 sqlite3_memory_highwater(int resetFlag){
  sqlite3_uint64 n;
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(1);
  }
  sqlite3_mutex_enter(mem.mutex, 1);
  n = mem.mxUsed;
  if( resetFlag ){
    mem.mxUsed = mem.nowUsed;
  }
  sqlite3_mutex_leave(mem.mutex);  
  return n;
}

/*
** Change the alarm callback
*/
int sqlite3_memory_alarm(
  void(*xCallback)(void *pArg, sqlite3_uint64 used, unsigned int N),
  void *pArg,
  sqlite3_uint64 iThreshold
){
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(1);
  }
  sqlite3_mutex_enter(mem.mutex, 1);
  mem.alarmCallback = xCallback;
  mem.alarmArg = pArg;
  mem.alarmThreshold = iThreshold;
  sqlite3_mutex_leave(mem.mutex);
  return SQLITE_OK;

/*
** Allocate nBytes of memory
*/
void *sqlite3_malloc(unsigned int nBytes){
  sqlite3_uint64 *p;
  if( mem.mutex==0 ){
    mem.mutex = sqlite3_mutex_alloc(1);
  }
  sqlite3_mutex_enter(mem.mutex, 1);
  if( mem.nowUsed+nBytes>=mem.alarmThreshold ){
    sqlite3MemsysAlarm(nBytes);
  }
  p = malloc(nBytes+8);
  if( p==0 ){

  pthread_mutex_unlock(&mutexAux);
  return rc;
#else
  return inMutex>0;
#endif
}

/*
** Remember the number of thread-specific-data blocks allocated.
** Use this to verify that we are not leaking thread-specific-data.
** Ticket #1601
*/
#ifdef SQLITE_TEST
int sqlite3_tsd_count = 0;
# ifdef SQLITE_UNIX_THREADS
    static pthread_mutex_t tsd_counter_mutex = PTHREAD_MUTEX_INITIALIZER;
#   define TSD_COUNTER(N) \
             pthread_mutex_lock(&tsd_counter_mutex); \
             sqlite3_tsd_count += N; \
             pthread_mutex_unlock(&tsd_counter_mutex);
# else
#   define TSD_COUNTER(N)  sqlite3_tsd_count += N
# endif
#else
# define TSD_COUNTER(N)  /* no-op */
#endif

/*
** If called with allocateFlag>0, then return a pointer to thread
** specific data for the current thread.  Allocate and zero the
** thread-specific data if it does not already exist.
**
** If called with allocateFlag==0, then check the current thread
** specific data.  Return it if it exists.  If it does not exist,
** then return NULL.
**
** If called with allocateFlag<0, check to see if the thread specific
** data is allocated and is all zero.  If it is then deallocate it.
** Return a pointer to the thread specific data or NULL if it is
** unallocated or gets deallocated.
*/
ThreadData *sqlite3UnixThreadSpecificData(int allocateFlag){
  static const ThreadData zeroData = {0};  /* Initializer to silence warnings
                                           ** from broken compilers */
#ifdef SQLITE_UNIX_THREADS
  static pthread_key_t key;
  static int keyInit = 0;
  ThreadData *pTsd;

  if( !keyInit ){
    sqlite3OsEnterMutex();
    if( !keyInit ){
      int rc;
      rc = pthread_key_create(&key, 0);
      if( rc ){
        sqlite3OsLeaveMutex();
        return 0;
      }
      keyInit = 1;
    }
    sqlite3OsLeaveMutex();
  }

  pTsd = pthread_getspecific(key);
  if( allocateFlag>0 ){
    if( pTsd==0 ){
      if( !sqlite3TestMallocFail() ){
        pTsd = sqlite3OsMalloc(sizeof(zeroData));
      }
#ifdef SQLITE_MEMDEBUG
      sqlite3_isFail = 0;
#endif
      if( pTsd ){
        *pTsd = zeroData;
        pthread_setspecific(key, pTsd);
        TSD_COUNTER(+1);
      }
    }
  }else if( pTsd!=0 && allocateFlag<0 
            && memcmp(pTsd, &zeroData, sizeof(ThreadData))==0 ){
    sqlite3OsFree(pTsd);
    pthread_setspecific(key, 0);
    TSD_COUNTER(-1);
    pTsd = 0;
  }
  return pTsd;
#else
  static ThreadData *pTsd = 0;
  if( allocateFlag>0 ){
    if( pTsd==0 ){
#if 0
      if( !sqlite3TestMallocFail() ){
        pTsd = sqlite3OsMalloc( sizeof(zeroData) );
      }
#ifdef SQLITE_MEMDEBUG
      sqlite3_isFail = 0;
#endif
#endif
      if( pTsd ){
        *pTsd = zeroData;
        TSD_COUNTER(+1);
      }
    }
  }else if( pTsd!=0 && allocateFlag<0
            && memcmp(pTsd, &zeroData, sizeof(ThreadData))==0 ){
    sqlite3OsFree(pTsd);
    TSD_COUNTER(-1);
    pTsd = 0;
  }
  return pTsd;
#endif
}

/*
** The following variable, if set to a non-zero value, becomes the result
** returned from sqlite3OsCurrentTime().  This is used for testing.
*/
#ifdef SQLITE_TEST
int sqlite3_current_time = 0;
#endif

#ifdef SQLITE_TEST
  if( sqlite3_current_time ){
    *prNow = sqlite3_current_time/86400.0 + 2440587.5;
  }
#endif
  return 0;
}

#endif /* OS_UNIX */

** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite.h.in,v 1.224 2007/08/15 17:08:46 danielk1977 Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.

** The sqlite3_mutex_alloc() routine allocates a new
** mutex and returns a pointer to it.  If it returns NULL
** that means that a mutex could not be allocated.  SQLite
** will unwind its stack and return an error.  The argument
** to sqlite3_mutex_alloc() is usually zero, which causes
** any space required for the mutex to be obtained from
** sqlite3_malloc().  However if the argument is a positive
** integer less than SQLITE_NUM_STATIC_MUTEX, then a pointer
** to a static mutex is returned.  There are a finite number
** of static mutexes.  Static mutexes should not be passed
** to sqlite3_mutex_free().  Static mutexes are used internally
** by the SQLite core and should not be used by the application.
**
** The sqlite3_mutex_free() routine deallocates a previously
** allocated mutex.  SQLite is careful to deallocate every

/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.588 2007/08/16 10:09:03 danielk1977 Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
#include "sqliteLimit.h"


#if defined(SQLITE_TCL) || defined(TCLSH)

typedef sqlite_uint64 u64;         /* 8-byte unsigned integer */
typedef UINT32_TYPE u32;           /* 4-byte unsigned integer */
typedef UINT16_TYPE u16;           /* 2-byte unsigned integer */
typedef INT16_TYPE i16;            /* 2-byte signed integer */
typedef UINT8_TYPE u8;             /* 1-byte unsigned integer */
typedef UINT8_TYPE i8;             /* 1-byte signed integer */











/*
** Macros to determine whether the machine is big or little endian,
** evaluated at runtime.
*/
extern const int sqlite3one;
#if defined(i386) || defined(__i386__) || defined(_M_IX86)
# define SQLITE_BIGENDIAN    0

** Defer sourcing vdbe.h and btree.h until after the "u8" and 
** "BusyHandler typedefs.
*/
#include "vdbe.h"
#include "btree.h"
#include "pager.h"

#ifdef SQLITE_MEMDEBUG
/*
** The following global variables are used for testing and debugging
** only.  They only work if SQLITE_MEMDEBUG is defined.
*/
extern int sqlite3_nMalloc;      /* Number of sqliteMalloc() calls */
extern int sqlite3_nFree;        /* Number of sqliteFree() calls */
extern int sqlite3_iMallocFail;  /* Fail sqliteMalloc() after this many calls */
extern int sqlite3_iMallocReset; /* Set iMallocFail to this when it reaches 0 */

extern void *sqlite3_pFirst;         /* Pointer to linked list of allocations */
extern int sqlite3_nMaxAlloc;        /* High water mark of ThreadData.nAlloc */
extern int sqlite3_mallocDisallowed; /* assert() in sqlite3Malloc() if set */
extern int sqlite3_isFail;           /* True if all malloc calls should fail */
extern const char *sqlite3_zFile;    /* Filename to associate debug info with */
extern int sqlite3_iLine;            /* Line number for debug info */

#define ENTER_MALLOC (sqlite3_zFile = __FILE__, sqlite3_iLine = __LINE__)
#define sqliteMalloc(x)          (ENTER_MALLOC, sqlite3Malloc(x,1))
#define sqliteMallocRaw(x)       (ENTER_MALLOC, sqlite3MallocRaw(x,1))
#define sqliteRealloc(x,y)       (ENTER_MALLOC, sqlite3Realloc(x,y))
#define sqliteStrDup(x)          (ENTER_MALLOC, sqlite3StrDup(x))
#define sqliteStrNDup(x,y)       (ENTER_MALLOC, sqlite3StrNDup(x,y))
#define sqliteReallocOrFree(x,y) (ENTER_MALLOC, sqlite3ReallocOrFree(x,y))

#else

#define ENTER_MALLOC 0
#define sqliteMalloc(x)          sqlite3Malloc(x,1)
#define sqliteMallocRaw(x)       sqlite3MallocRaw(x,1)
#define sqliteRealloc(x,y)       sqlite3Realloc(x,y)
#define sqliteStrDup(x)          sqlite3StrDup(x)
#define sqliteStrNDup(x,y)       sqlite3StrNDup(x,y)
#define sqliteReallocOrFree(x,y) sqlite3ReallocOrFree(x,y)

#endif

/* Variable sqlite3MallocHasFailed is set to true after a malloc() 
** failure occurs. 
**
** The sqlite3MallocFailed() macro returns true if a malloc has failed
** in this thread since the last call to sqlite3ApiExit(), or false 
** otherwise.
*/
extern int sqlite3MallocHasFailed;
#define sqlite3MallocFailed() (sqlite3MallocHasFailed && sqlite3OsInMutex(1))

#define sqliteFree(x)          sqlite3FreeX(x)
#define sqliteAllocSize(x)     sqlite3AllocSize(x)

/*
** An instance of this structure might be allocated to store information
** specific to a single thread.
*/
struct ThreadData {
  int dummy;               /* So that this structure is never empty */

#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
  int nSoftHeapLimit;      /* Suggested max mem allocation.  No limit if <0 */
  int nAlloc;              /* Number of bytes currently allocated */
  Pager *pPager;           /* Linked list of all pagers in this thread */
#endif

#ifndef SQLITE_OMIT_SHARED_CACHE
  u8 useSharedData;        /* True if shared pagers and schemas are enabled */
  BtShared *pBtree;        /* Linked list of all currently open BTrees */
#endif
};

/*
** Name of the master database table.  The master database table
** is a special table that holds the names and attributes of all
** user tables and indices.
*/
#define MASTER_NAME       "sqlite_master"

**    May you share freely, never taking more than you give.
**
*************************************************************************
** Code for testing all sorts of SQLite interfaces.  This code
** is not included in the SQLite library.  It is used for automated
** testing of the SQLite library.
**
** $Id: test1.c,v 1.261 2007/08/16 10:09:03 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "tcl.h"
#include "os.h"
#include <stdlib.h>
#include <string.h>

  int i;
  extern int sqlite3_where_trace;
  extern int sqlite3_sync_count, sqlite3_fullsync_count;
  extern int sqlite3_opentemp_count;
  extern int sqlite3_memUsed;
  extern int sqlite3_memMax;
  extern int sqlite3_like_count;
  extern int sqlite3_tsd_count;
  extern int sqlite3_xferopt_count;
  extern int sqlite3_pager_readdb_count;
  extern int sqlite3_pager_writedb_count;
  extern int sqlite3_pager_writej_count;
  extern int sqlite3_pager_pgfree_count;
#if OS_UNIX && defined(SQLITE_TEST) && defined(THREADSAFE) && THREADSAFE
  extern int threadsOverrideEachOthersLocks;

      (char*)&sqlite3_like_count, TCL_LINK_INT);
  Tcl_LinkVar(interp, "sqlite_interrupt_count", 
      (char*)&sqlite3_interrupt_count, TCL_LINK_INT);
  Tcl_LinkVar(interp, "sqlite_open_file_count", 
      (char*)&sqlite3_open_file_count, TCL_LINK_INT);
  Tcl_LinkVar(interp, "sqlite_current_time", 
      (char*)&sqlite3_current_time, TCL_LINK_INT);
  Tcl_LinkVar(interp, "sqlite3_tsd_count",
      (char*)&sqlite3_tsd_count, TCL_LINK_INT);
  Tcl_LinkVar(interp, "sqlite3_xferopt_count",
      (char*)&sqlite3_xferopt_count, TCL_LINK_INT);
  Tcl_LinkVar(interp, "sqlite3_pager_readdb_count",
      (char*)&sqlite3_pager_readdb_count, TCL_LINK_INT);
  Tcl_LinkVar(interp, "sqlite3_pager_writedb_count",
      (char*)&sqlite3_pager_writedb_count, TCL_LINK_INT);
  Tcl_LinkVar(interp, "sqlite3_pager_writej_count",

# 2001 September 15
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file runs all tests.
#
# $Id: all.test,v 1.44 2007/06/18 12:22:43 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl
rename finish_test really_finish_test
proc finish_test {} {
  memleak_check
}

    catch {db close}
    if {$sqlite_open_file_count>0} {
      puts "$tail did not close all files: $sqlite_open_file_count"
      incr nErr
      lappend ::failList $tail
      set sqlite_open_file_count 0
    }
    if {$::sqlite3_tsd_count} {
      puts "Thread-specific data leak: $::sqlite3_tsd_count instances"
      incr nErr
      lappend ::failList $tail
      set ::sqlite3_tsd_count 0
    }
  }
  if {[info exists Leak]} {
    lappend LeakList $Leak
  }
}

# Do one last test to look for a memory leak in the library.  This will

#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file runs all tests.
#
# $Id: quick.test,v 1.59 2007/06/18 12:22:43 drh Exp $

proc lshift {lvar} {
  upvar $lvar l
  set ret [lindex $l 0]
  set l [lrange $l 1 end]
  return $ret
}

  catch {db close}
  if {$sqlite_open_file_count>0} {
    puts "$tail did not close all files: $sqlite_open_file_count"
    incr nErr
    lappend ::failList $tail
    set sqlite_open_file_count 0
  }
  if {$::sqlite3_tsd_count} {
    puts "Thread-specific data leak: $::sqlite3_tsd_count instances"
    incr nErr
    lappend ::failList $tail
    set ::sqlite3_tsd_count 0
  }
}
source $testdir/misuse.test

set sqlite_open_file_count 0
really_finish_test

# 2001 September 15
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements some common TCL routines used for regression
# testing the SQLite library
#
# $Id: tester.tcl,v 1.82 2007/08/10 16:41:09 drh Exp $

# Make sure tclsqlite3 was compiled correctly.  Abort now with an
# error message if not.
#
if {[sqlite3 -tcl-uses-utf]} {
  if {"\u1234"=="u1234"} {
    puts stderr "***** BUILD PROBLEM *****"

  if {$heaplimit!=$::soft_limit} {
    puts "soft-heap-limit changed by this script\
          from $::soft_limit to $heaplimit"
  } elseif {$heaplimit!="" && $heaplimit>0} {
    puts "soft-heap-limit set to $heaplimit"
  }
  sqlite3_soft_heap_limit 0
  if {$::sqlite3_tsd_count} {
     puts "Thread-specific data leak: $::sqlite3_tsd_count instances"
     incr nErr
  } else {
     puts "Thread-specific data deallocated properly"
  }
  incr nTest
  puts "$nErr errors out of $nTest tests"
  puts "Failures on these tests: $::failList"
  if {$nErr>0 && ![working_64bit_int]} {
    puts "******************************************************************"
    puts "N.B.:  The version of TCL that you used to build this test harness"
    puts "is defective in that it does not support 64-bit integers.  Some or"