SQLite

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
******************************************************************************
**
** This file contains code that is specific to OS/2.
**
** $Id: os_os2.c,v 1.40 2008/05/20 19:08:54 pweilbacher Exp $
** $Id: os_os2.c,v 1.41 2008/06/12 02:16:45 shane Exp $
*/

#include "sqliteInt.h"

#if OS_OS2

/*

  ULONG ulAction;
  char *zNameCp;

  memset( pFile, 0, sizeof(*pFile) );

  OSTRACE2( "OPEN want %d\n", flags );

  //ulOpenMode = flags & SQLITE_OPEN_READWRITE ? OPEN_ACCESS_READWRITE : OPEN_ACCESS_READONLY;
  /*ulOpenMode = flags & SQLITE_OPEN_READWRITE ? OPEN_ACCESS_READWRITE : OPEN_ACCESS_READONLY;*/
  if( flags & SQLITE_OPEN_READWRITE ){
    ulOpenMode |= OPEN_ACCESS_READWRITE;
    OSTRACE1( "OPEN read/write\n" );
  }else{
    ulOpenMode |= OPEN_ACCESS_READONLY;
    OSTRACE1( "OPEN read only\n" );
  }

  //ulOpenFlags = flags & SQLITE_OPEN_CREATE ? OPEN_ACTION_CREATE_IF_NEW : OPEN_ACTION_FAIL_IF_NEW;
  /*ulOpenFlags = flags & SQLITE_OPEN_CREATE ? OPEN_ACTION_CREATE_IF_NEW : OPEN_ACTION_FAIL_IF_NEW;*/
  if( flags & SQLITE_OPEN_CREATE ){
    ulOpenFlags |= OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_CREATE_IF_NEW;
    OSTRACE1( "OPEN open new/create\n" );
  }else{
    ulOpenFlags |= OPEN_ACTION_OPEN_IF_EXISTS | OPEN_ACTION_FAIL_IF_NEW;
    OSTRACE1( "OPEN open existing\n" );
  }

  //ulOpenMode |= flags & SQLITE_OPEN_MAIN_DB ? OPEN_SHARE_DENYNONE : OPEN_SHARE_DENYWRITE;
  /*ulOpenMode |= flags & SQLITE_OPEN_MAIN_DB ? OPEN_SHARE_DENYNONE : OPEN_SHARE_DENYWRITE;*/
  if( flags & SQLITE_OPEN_MAIN_DB ){
    ulOpenMode |= OPEN_SHARE_DENYNONE;
    OSTRACE1( "OPEN share read/write\n" );
  }else{
    ulOpenMode |= OPEN_SHARE_DENYWRITE;
    OSTRACE1( "OPEN share read only\n" );
  }

  if( flags & (SQLITE_OPEN_TEMP_DB | SQLITE_OPEN_TEMP_JOURNAL
               | SQLITE_OPEN_SUBJOURNAL) ){
    char pathUtf8[CCHMAXPATH];
    //ulFileAttribute = FILE_HIDDEN;  //for debugging, we want to make sure it is deleted
    /*ulFileAttribute = FILE_HIDDEN;  //for debugging, we want to make sure it is deleted*/
    ulFileAttribute = FILE_NORMAL;
    sqlite3OsFullPathname( pVfs, zName, CCHMAXPATH, pathUtf8 );
    pFile->pathToDel = convertUtf8PathToCp( pathUtf8 );
    OSTRACE1( "OPEN hidden/delete on close file attributes\n" );
  }else{
    ulFileAttribute = FILE_ARCHIVED | FILE_NORMAL;
    pFile->pathToDel = NULL;

**
*************************************************************************
** Utility functions used throughout sqlite.
**
** This file contains functions for allocating memory, comparing
** strings, and stuff like that.
**
** $Id: util.c,v 1.230 2008/05/19 15:54:59 drh Exp $
** $Id: util.c,v 1.231 2008/06/12 02:16:45 shane Exp $
*/
#include "sqliteInt.h"
#include <stdarg.h>
#include <ctype.h>


/*

** Read a 64-bit variable-length integer from memory starting at p[0].
** Return the number of bytes read.  The value is stored in *v.
*/
int sqlite3GetVarint(const unsigned char *p, u64 *v){
  u32 a,b,s;

  a = *p;
  // a: p0 (unmasked)
  /* a: p0 (unmasked) */
  if (!(a&0x80))
  {
    *v = a;
    return 1;
  }

  p++;
  b = *p;
  // b: p1 (unmasked)
  /* b: p1 (unmasked) */
  if (!(b&0x80))
  {
    a &= 0x7f;
    a = a<<7;
    a |= b;
    *v = a;
    return 2;
  }

  p++;
  a = a<<14;
  a |= *p;
  // a: p0<<14 | p2 (unmasked)
  /* a: p0<<14 | p2 (unmasked) */
  if (!(a&0x80))
  {
    a &= (0x7f<<14)|(0x7f);
    b &= 0x7f;
    b = b<<7;
    a |= b;
    *v = a;
    return 3;
  }

  // CSE1 from below
  /* CSE1 from below */
  a &= (0x7f<<14)|(0x7f);
  p++;
  b = b<<14;
  b |= *p;
  // b: p1<<14 | p3 (unmasked)
  /* b: p1<<14 | p3 (unmasked) */
  if (!(b&0x80))
  {
    b &= (0x7f<<14)|(0x7f);
    // moved CSE1 up
    // a &= (0x7f<<14)|(0x7f);
    /* moved CSE1 up */
    /* a &= (0x7f<<14)|(0x7f); */
    a = a<<7;
    a |= b;
    *v = a;
    return 4;
  }

  // a: p0<<14 | p2 (masked)
  // b: p1<<14 | p3 (unmasked)
  // 1:save off p0<<21 | p1<<14 | p2<<7 | p3 (masked)
  // moved CSE1 up
  // a &= (0x7f<<14)|(0x7f);
  /* a: p0<<14 | p2 (masked) */
  /* b: p1<<14 | p3 (unmasked) */
  /* 1:save off p0<<21 | p1<<14 | p2<<7 | p3 (masked) */
  /* moved CSE1 up */
  /* a &= (0x7f<<14)|(0x7f); */
  b &= (0x7f<<14)|(0x7f);
  s = a;
  // s: p0<<14 | p2 (masked)
  /* s: p0<<14 | p2 (masked) */

  p++;
  a = a<<14;
  a |= *p;
  // a: p0<<28 | p2<<14 | p4 (unmasked)
  /* a: p0<<28 | p2<<14 | p4 (unmasked) */
  if (!(a&0x80))
  {
    // we can skip these cause they were (effectively) done above in calc'ing s
    // a &= (0x7f<<28)|(0x7f<<14)|(0x7f);
    // b &= (0x7f<<14)|(0x7f);
    /* we can skip these cause they were (effectively) done above in calc'ing s */
    /* a &= (0x7f<<28)|(0x7f<<14)|(0x7f); */
    /* b &= (0x7f<<14)|(0x7f); */
    b = b<<7;
    a |= b;
    s = s>>18;
    *v = ((u64)s)<<32 | a;
    return 5;
  }

  // 2:save off p0<<21 | p1<<14 | p2<<7 | p3 (masked)
  /* 2:save off p0<<21 | p1<<14 | p2<<7 | p3 (masked) */
  s = s<<7;
  s |= b;
  // s: p0<<21 | p1<<14 | p2<<7 | p3 (masked)
  /* s: p0<<21 | p1<<14 | p2<<7 | p3 (masked) */

  p++;
  b = b<<14;
  b |= *p;
  // b: p1<<28 | p3<<14 | p5 (unmasked)
  /* b: p1<<28 | p3<<14 | p5 (unmasked) */
  if (!(b&0x80))
  {
    // we can skip this cause it was (effectively) done above in calc'ing s
    // b &= (0x7f<<28)|(0x7f<<14)|(0x7f);
    /* we can skip this cause it was (effectively) done above in calc'ing s */
    /* b &= (0x7f<<28)|(0x7f<<14)|(0x7f); */
    a &= (0x7f<<14)|(0x7f);
    a = a<<7;
    a |= b;
    s = s>>18;
    *v = ((u64)s)<<32 | a;
    return 6;
  }

  p++;
  a = a<<14;
  a |= *p;
  // a: p2<<28 | p4<<14 | p6 (unmasked)
  /* a: p2<<28 | p4<<14 | p6 (unmasked) */
  if (!(a&0x80))
  {
    a &= (0x7f<<28)|(0x7f<<14)|(0x7f);
    b &= (0x7f<<14)|(0x7f);
    b = b<<7;
    a |= b;
    s = s>>11;
    *v = ((u64)s)<<32 | a;
    return 7;
  }

  // CSE2 from below
  /* CSE2 from below */
  a &= (0x7f<<14)|(0x7f);
  p++;
  b = b<<14;
  b |= *p;
  // b: p3<<28 | p5<<14 | p7 (unmasked)
  /* b: p3<<28 | p5<<14 | p7 (unmasked) */
  if (!(b&0x80))
  {
    b &= (0x7f<<28)|(0x7f<<14)|(0x7f);
    // moved CSE2 up
    // a &= (0x7f<<14)|(0x7f);
    /* moved CSE2 up */
    /* a &= (0x7f<<14)|(0x7f); */
    a = a<<7;
    a |= b;
    s = s>>4;
    *v = ((u64)s)<<32 | a;
    return 8;
  }

  p++;
  a = a<<15;
  a |= *p;
  // a: p4<<29 | p6<<15 | p8 (unmasked)
  /* a: p4<<29 | p6<<15 | p8 (unmasked) */

  // moved CSE2 up
  // a &= (0x7f<<29)|(0x7f<<15)|(0xff);
  /* moved CSE2 up */
  /* a &= (0x7f<<29)|(0x7f<<15)|(0xff); */
  b &= (0x7f<<14)|(0x7f);
  b = b<<8;
  a |= b;

  s = s<<4;
  b = p[-4];
  b &= 0x7f;

** single-byte case.  All code should use the MACRO version as 
** this function assumes the single-byte case has already been handled.
*/
int sqlite3GetVarint32(const unsigned char *p, u32 *v){
  u32 a,b;

  a = *p;
  // a: p0 (unmasked)
  /* a: p0 (unmasked) */
#ifndef getVarint32
  if (!(a&0x80))
  {
    *v = a;
    return 1;
  }
#endif

  p++;
  b = *p;
  // b: p1 (unmasked)
  /* b: p1 (unmasked) */
  if (!(b&0x80))
  {
    a &= 0x7f;
    a = a<<7;
    *v = a | b;
    return 2;
  }

  p++;
  a = a<<14;
  a |= *p;
  // a: p0<<14 | p2 (unmasked)
  /* a: p0<<14 | p2 (unmasked) */
  if (!(a&0x80))
  {
    a &= (0x7f<<14)|(0x7f);
    b &= 0x7f;
    b = b<<7;
    *v = a | b;
    return 3;
  }

  p++;
  b = b<<14;
  b |= *p;
  // b: p1<<14 | p3 (unmasked)
  /* b: p1<<14 | p3 (unmasked) */
  if (!(b&0x80))
  {
    b &= (0x7f<<14)|(0x7f);
    a &= (0x7f<<14)|(0x7f);
    a = a<<7;
    *v = a | b;
    return 4;
  }

  p++;
  a = a<<14;
  a |= *p;
  // a: p0<<28 | p2<<14 | p4 (unmasked)
  /* a: p0<<28 | p2<<14 | p4 (unmasked) */
  if (!(a&0x80))
  {
    a &= (0x7f<<28)|(0x7f<<14)|(0x7f);
    b &= (0x7f<<28)|(0x7f<<14)|(0x7f);
    b = b<<7;
    *v = a | b;
    return 5;