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Comment:More thorough initialization of a buffer when writing the rollback journal header, in order to prevent a harmless valgrind warning. CVSTrac ticket #4039
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SHA1: 5e2f5496834bffb79236f803cdfedb18fbd533b7
User & Date: drh 2009-08-31 16:09:59
Context
2009-09-01
16:39
Merge in changes to support recursive invocation of triggers (disabled by default). (check-in: c1b388c3 user: dan tags: trunk)
2009-08-31
16:09
More thorough initialization of a buffer when writing the rollback journal header, in order to prevent a harmless valgrind warning. CVSTrac ticket #4039 (check-in: 5e2f5496 user: drh tags: trunk)
2009-08-28
00:49
Add a new source code logo gif. (check-in: 6abcba10 user: drh tags: trunk)
Changes
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Changes to src/pager.c.

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  assert( isOpen(pPager->fd) || pPager->noSync );
  if( (pPager->noSync) || (pPager->journalMode==PAGER_JOURNALMODE_MEMORY)
   || (sqlite3OsDeviceCharacteristics(pPager->fd)&SQLITE_IOCAP_SAFE_APPEND) 
  ){
    memcpy(zHeader, aJournalMagic, sizeof(aJournalMagic));
    put32bits(&zHeader[sizeof(aJournalMagic)], 0xffffffff);
  }else{
    zHeader[0] = '\0';
    put32bits(&zHeader[sizeof(aJournalMagic)], 0);
  }

  /* The random check-hash initialiser */ 
  sqlite3_randomness(sizeof(pPager->cksumInit), &pPager->cksumInit);
  put32bits(&zHeader[sizeof(aJournalMagic)+4], pPager->cksumInit);
  /* The initial database size */
  put32bits(&zHeader[sizeof(aJournalMagic)+8], pPager->dbOrigSize);








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  assert( isOpen(pPager->fd) || pPager->noSync );
  if( (pPager->noSync) || (pPager->journalMode==PAGER_JOURNALMODE_MEMORY)
   || (sqlite3OsDeviceCharacteristics(pPager->fd)&SQLITE_IOCAP_SAFE_APPEND) 
  ){
    memcpy(zHeader, aJournalMagic, sizeof(aJournalMagic));
    put32bits(&zHeader[sizeof(aJournalMagic)], 0xffffffff);
  }else{

    memset(zHeader, 0, sizeof(aJournalMagic)+4);
  }

  /* The random check-hash initialiser */ 
  sqlite3_randomness(sizeof(pPager->cksumInit), &pPager->cksumInit);
  put32bits(&zHeader[sizeof(aJournalMagic)+4], pPager->cksumInit);
  /* The initial database size */
  put32bits(&zHeader[sizeof(aJournalMagic)+8], pPager->dbOrigSize);
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