Fossil

  va_list ap;
  va_start(ap, zFmt);
  zMsg = sqlite3_vmprintf(zFmt, ap);
  sqlite3_result_error(ctx, zMsg, -1);
  sqlite3_free(zMsg);
  va_end(ap);
}

#if defined(_WIN32)
/*
** This function is designed to convert a Win32 FILETIME structure into the
** number of seconds since the Unix Epoch (1970-01-01 00:00:00 UTC).
*/
static sqlite3_uint64 fileTimeToUnixTime(
  LPFILETIME pFileTime
){
  SYSTEMTIME epochSystemTime;
  ULARGE_INTEGER epochIntervals;
  FILETIME epochFileTime;
  ULARGE_INTEGER fileIntervals;

  memset(&epochSystemTime, 0, sizeof(SYSTEMTIME));
  epochSystemTime.wYear = 1970;
  epochSystemTime.wMonth = 1;
  epochSystemTime.wDay = 1;
  SystemTimeToFileTime(&epochSystemTime, &epochFileTime);
  epochIntervals.LowPart = epochFileTime.dwLowDateTime;
  epochIntervals.HighPart = epochFileTime.dwHighDateTime;

  fileIntervals.LowPart = pFileTime->dwLowDateTime;
  fileIntervals.HighPart = pFileTime->dwHighDateTime;

  return (fileIntervals.QuadPart - epochIntervals.QuadPart) / 10000000;
}

/*
** 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 ){
    memset(&fd, 0, sizeof(WIN32_FIND_DATA));
    hFindFile = FindFirstFileW(zUnicodeName, &fd);
    if( hFindFile!=NULL ){
      pStatBuf->st_ctime = (time_t)fileTimeToUnixTime(&fd.ftCreationTime);
      pStatBuf->st_atime = (time_t)fileTimeToUnixTime(&fd.ftLastAccessTime);
      pStatBuf->st_mtime = (time_t)fileTimeToUnixTime(&fd.ftLastWriteTime);
      FindClose(hFindFile);
    }
    sqlite3_free(zUnicodeName);
  }
}
#endif

/*
** 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)
  int rc = stat(zPath, pStatBuf);
  if( rc==0 ) statTimesToUtc(zPath, pStatBuf);
  return rc;
#else
  return stat(zPath, pStatBuf);
#endif
}

/*
** 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)
  int rc = lstat(zPath, pStatBuf);
  if( rc==0 ) statTimesToUtc(zPath, pStatBuf);
  return rc;
#else
  return lstat(zPath, pStatBuf);
#endif
}

/*
** Argument zFile is the name of a file that will be created and/or written
** by SQL function writefile(). This function ensures that the directory
** zFile will be written to exists, creating it if required. The permissions
** for any path components created by this function are set to (mode&0777).
**

      struct stat sStat;
      int rc2;

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

      rc2 = fileStat(zCopy, &sStat);
      if( rc2!=0 ){
        if( mkdir(zCopy, mode & 0777) ) rc = SQLITE_ERROR;
      }else{
        if( !S_ISDIR(sStat.st_mode) ) rc = SQLITE_ERROR;
      }
      zCopy[i] = '/';
      i++;

      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;
        }
      }
    }else{

    GetSystemTime(&currentTime);
    SystemTimeToFileTime(&currentTime, &lastAccess);
    intervals = Int32x32To64(mtime, 10000000) + 116444736000000000;
    lastWrite.dwLowDateTime = (DWORD)intervals;
    lastWrite.dwHighDateTime = intervals >> 32;
    zUnicodeName = sqlite3_win32_utf8_to_unicode(zFile);
    if( zUnicodeName==0 ){
      return 1;
    }
    hFile = CreateFileW(
      zUnicodeName, FILE_WRITE_ATTRIBUTES, 0, NULL, OPEN_EXISTING,
      FILE_FLAG_BACKUP_SEMANTICS, NULL
    );
    sqlite3_free(zUnicodeName);
    if( hFile!=INVALID_HANDLE_VALUE ){
      BOOL bResult = SetFileTime(hFile, NULL, &lastAccess, &lastWrite);
      CloseHandle(hFile);
      return !bResult;
    }else{
      return 1;
    }
#elif defined(AT_FDCWD) && 0 /* utimensat() is not universally available */
    /* Recent unix */
    struct timespec times[2];
    times[0].tv_nsec = times[1].tv_nsec = 0;
    times[0].tv_sec = time(0);
    times[1].tv_sec = mtime;
    if( utimensat(AT_FDCWD, zFile, times, AT_SYMLINK_NOFOLLOW) ){
      return 1;

      if( pEntry->d_name[0]=='.' ){
       if( pEntry->d_name[1]=='.' && pEntry->d_name[2]=='\0' ) continue;
       if( pEntry->d_name[1]=='\0' ) continue;
      }
      sqlite3_free(pCur->zPath);
      pCur->zPath = sqlite3_mprintf("%s/%s", pLvl->zDir, pEntry->d_name);
      if( pCur->zPath==0 ) return SQLITE_NOMEM;
      if( fileLinkStat(pCur->zPath, &pCur->sStat) ){
        fsdirSetErrmsg(pCur, "cannot stat file: %s", pCur->zPath);
        return SQLITE_ERROR;
      }
      return SQLITE_OK;
    }
    closedir(pLvl->pDir);
    sqlite3_free(pLvl->zDir);

  }else{
    pCur->zPath = sqlite3_mprintf("%s", zDir);
  }

  if( pCur->zPath==0 ){
    return SQLITE_NOMEM;
  }
  if( fileLinkStat(pCur->zPath, &pCur->sStat) ){
    fsdirSetErrmsg(pCur, "cannot stat file: %s", pCur->zPath);
    return SQLITE_ERROR;
  }

  return SQLITE_OK;
}

#define COMPLETION_KEYWORDS      1
#define COMPLETION_PRAGMAS       2
#define COMPLETION_FUNCTIONS     3
#define COMPLETION_COLLATIONS    4
#define COMPLETION_INDEXES       5
#define COMPLETION_TRIGGERS      6
#define COMPLETION_DATABASES     7
#define COMPLETION_TABLES        8    /* Also VIEWs and TRIGGERs */
#define COMPLETION_COLUMNS       9
#define COMPLETION_MODULES       10
#define COMPLETION_EOF           11

/*
** The completionConnect() method is invoked to create a new
** completion_vtab that describes the completion virtual table.

          char *zSql = 0;
          const char *zSep = "";
          sqlite3_prepare_v2(pCur->db, "PRAGMA database_list", -1, &pS2, 0);
          while( sqlite3_step(pS2)==SQLITE_ROW ){
            const char *zDb = (const char*)sqlite3_column_text(pS2, 1);
            zSql = sqlite3_mprintf(
               "%z%s"
               "SELECT name FROM \"%w\".sqlite_master",

               zSql, zSep, zDb
            );
            if( zSql==0 ) return SQLITE_NOMEM;
            zSep = " UNION ";
          }
          sqlite3_finalize(pS2);
          sqlite3_prepare_v2(pCur->db, zSql, -1, &pCur->pStmt, 0);

*/
static u32 zipfileGetTime(sqlite3_value *pVal){
  if( pVal==0 || sqlite3_value_type(pVal)==SQLITE_NULL ){
    return zipfileTime();
  }
  return (u32)sqlite3_value_int64(pVal);
}

/*
** Unless it is NULL, entry pOld is currently part of the pTab->pFirstEntry
** linked list.  Remove it from the list and free the object.
*/
static void zipfileRemoveEntryFromList(ZipfileTab *pTab, ZipfileEntry *pOld){
  if( pOld ){
    ZipfileEntry **pp;
    for(pp=&pTab->pFirstEntry; (*pp)!=pOld; pp=&((*pp)->pNext));
    *pp = (*pp)->pNext;
    zipfileEntryFree(pOld);
  }
}

/*
** xUpdate method.
*/
static int zipfileUpdate(
  sqlite3_vtab *pVtab, 
  int nVal, 

  int nPath = 0;                  /* strlen(zPath) */
  const u8 *pData = 0;            /* Pointer to buffer containing content */
  int nData = 0;                  /* Size of pData buffer in bytes */
  int iMethod = 0;                /* Compression method for new entry */
  u8 *pFree = 0;                  /* Free this */
  char *zFree = 0;                /* Also free this */
  ZipfileEntry *pOld = 0;
  ZipfileEntry *pOld2 = 0;
  int bUpdate = 0;                /* True for an update that modifies "name" */
  int bIsDir = 0;
  u32 iCrc32 = 0;

  if( pTab->pWriteFd==0 ){
    rc = zipfileBegin(pVtab);
    if( rc!=SQLITE_OK ) return rc;
  }

  /* If this is a DELETE or UPDATE, find the archive entry to delete. */
  if( sqlite3_value_type(apVal[0])!=SQLITE_NULL ){
    const char *zDelete = (const char*)sqlite3_value_text(apVal[0]);
    int nDelete = (int)strlen(zDelete);
    if( nVal>1 ){
      const char *zUpdate = (const char*)sqlite3_value_text(apVal[1]);
      if( zUpdate && zipfileComparePath(zUpdate, zDelete, nDelete)!=0 ){
        bUpdate = 1;
      }
    }
    for(pOld=pTab->pFirstEntry; 1; pOld=pOld->pNext){
      if( zipfileComparePath(pOld->cds.zFile, zDelete, nDelete)==0 ){
        break;
      }
      assert( pOld->pNext );
    }
  }

        zFree = sqlite3_mprintf("%s/", zPath);
        if( zFree==0 ){ rc = SQLITE_NOMEM; }
        zPath = (const char*)zFree;
        nPath++;
      }
    }

    /* Check that we're not inserting a duplicate entry -OR- updating an
    ** entry with a path, thereby making it into a duplicate. */
    if( (pOld==0 || bUpdate) && rc==SQLITE_OK ){
      ZipfileEntry *p;
      for(p=pTab->pFirstEntry; p; p=p->pNext){
        if( zipfileComparePath(p->cds.zFile, zPath, nPath)==0 ){
          switch( sqlite3_vtab_on_conflict(pTab->db) ){
            case SQLITE_IGNORE: {
              goto zipfile_update_done;
            }
            case SQLITE_REPLACE: {
              pOld2 = p;
              break;
            }
            default: {
              zipfileTableErr(pTab, "duplicate name: \"%s\"", zPath);
              rc = SQLITE_CONSTRAINT;
              break;
            }

        pNew->mUnixTime = (u32)mTime;
        rc = zipfileAppendEntry(pTab, pNew, pData, nData);
        zipfileAddEntry(pTab, pOld, pNew);
      }
    }
  }

  if( rc==SQLITE_OK && (pOld || pOld2) ){

    ZipfileCsr *pCsr;
    for(pCsr=pTab->pCsrList; pCsr; pCsr=pCsr->pCsrNext){
      if( pCsr->pCurrent && (pCsr->pCurrent==pOld || pCsr->pCurrent==pOld2) ){
        pCsr->pCurrent = pCsr->pCurrent->pNext;
        pCsr->bNoop = 1;
      }
    }

    zipfileRemoveEntryFromList(pTab, pOld);
    zipfileRemoveEntryFromList(pTab, pOld2);
  }

zipfile_update_done:
  sqlite3_free(pFree);
  sqlite3_free(zFree);
  return rc;
}

            explain_data_prepare(pArg, pExplain);
            exec_prepared_stmt(pArg, pExplain);
            explain_data_delete(pArg);
          }
          sqlite3_finalize(pExplain);
          sqlite3_free(zEQP);
        }
        if( pArg->autoEQP>=AUTOEQP_trigger && triggerEQP==0 ){
          sqlite3_db_config(db, SQLITE_DBCONFIG_TRIGGER_EQP, 0, 0);
          /* Reprepare pStmt before reactiving trace modes */
          sqlite3_finalize(pStmt);
          sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
        }
        restore_debug_trace_modes();
      }

      if( pArg ){
        pArg->cMode = pArg->mode;
        if( pArg->autoExplain
         && sqlite3_column_count(pStmt)==8