SQLite

#else
static sqlite3_uint64 vfslog_time(){
  return 0;
}
#endif

static void vfslog_call(
sqlite3_vfs *, int, int, sqlite3_uint64, sqlite3_int64, int, int, sqlite_int64);
static void vfslog_string(sqlite3_vfs *, const char *);

/*
** Close an vfslog-file.
*/
static int vfslogClose(sqlite3_file *pFile){
  sqlite3_uint64 t, t2;

){
  int rc;
  sqlite3_uint64 t, t2;
  VfslogFile *p = (VfslogFile *)pFile;
  t = vfslog_time();
  rc = p->pReal->pMethods->xRead(p->pReal, zBuf, iAmt, iOfst);
  t2 = vfslog_time() - t;
  vfslog_call(p->pVfslog, OS_READ, p->iFileId, t, t2, rc, iAmt, iOfst);
  return rc;
}

/*
** Write data to an vfslog-file.
*/
static int vfslogWrite(
  sqlite3_file *pFile,
  const void *z,
  int iAmt,
  sqlite_int64 iOfst
){
  int rc;
  sqlite3_uint64 t, t2;
  VfslogFile *p = (VfslogFile *)pFile;
  t = vfslog_time();
  rc = p->pReal->pMethods->xWrite(p->pReal, z, iAmt, iOfst);
  t2 = vfslog_time() - t;
  vfslog_call(p->pVfslog, OS_WRITE, p->iFileId, t, t2, rc, iAmt, iOfst);
  return rc;
}

/*
** Truncate an vfslog-file.
*/
static int vfslogTruncate(sqlite3_file *pFile, sqlite_int64 size){
  int rc;
  sqlite3_uint64 t, t2;
  VfslogFile *p = (VfslogFile *)pFile;
  t = vfslog_time();
  rc = p->pReal->pMethods->xTruncate(p->pReal, size);
  t2 = vfslog_time() - t;
  vfslog_call(p->pVfslog, OS_TRUNCATE, p->iFileId, t, t2, rc, 0, size);
  return rc;
}

/*
** Sync an vfslog-file.
*/
static int vfslogSync(sqlite3_file *pFile, int flags){

static int vfslogFileSize(sqlite3_file *pFile, sqlite_int64 *pSize){
  int rc;
  sqlite3_uint64 t, t2;
  VfslogFile *p = (VfslogFile *)pFile;
  t = vfslog_time();
  rc = p->pReal->pMethods->xFileSize(p->pReal, pSize);
  t2 = vfslog_time() - t;
  vfslog_call(p->pVfslog, OS_FILESIZE, p->iFileId, t, t2, rc, 0, *pSize);
  return rc;
}

/*
** Lock an vfslog-file.
*/
static int vfslogLock(sqlite3_file *pFile, int eLock){

  int *pResOut
){
  int rc;
  sqlite3_uint64 t, t2;
  t = vfslog_time();
  rc = REALVFS(pVfs)->xAccess(REALVFS(pVfs), zPath, flags, pResOut);
  t2 = vfslog_time() - t;
  vfslog_call(pVfs, OS_ACCESS, 0, t, t2, rc, flags, (sqlite3_int64)*pResOut);
  vfslog_string(pVfs, zPath);
  return rc;
}

/*
** Populate buffer zOut with the full canonical pathname corresponding
** to the pathname in zPath. zOut is guaranteed to point to a buffer

static void vfslogPut32bits(unsigned char *p, unsigned int v){
  p[0] = v>>24;
  p[1] = (unsigned char)(v>>16);
  p[2] = (unsigned char)(v>>8);
  p[3] = (unsigned char)v;
}

static void vfslogPut64bits(unsigned char *p, sqlite3_int64 v){
  vfslogPut32bits(p, (v >> 32) & 0xFFFFFFFF);
  vfslogPut32bits(&p[4], v & 0xFFFFFFFF);
}

#define VFSLOG_RECORD_SIZE 36

static void vfslog_call(
  sqlite3_vfs *pVfs,
  int eEvent,
  int iFileid,
  sqlite3_uint64 tStamp,
  sqlite3_int64 nClick,
  int return_code,
  int size,
  sqlite3_int64 offset
){
  VfslogVfs *p = (VfslogVfs *)pVfs;
  unsigned char *zRec;
  if( (VFSLOG_RECORD_SIZE+p->nBuf)>sizeof(p->aBuf) ){
    vfslog_flush(p);
  }
  zRec = (unsigned char *)&p->aBuf[p->nBuf];
  vfslogPut32bits(&zRec[0], eEvent);
  vfslogPut32bits(&zRec[4], iFileid);
  vfslogPut64bits(&zRec[8], (sqlite3_int64)tStamp);

  vfslogPut32bits(&zRec[16], (unsigned int)(nClick&0xffffffff));
  vfslogPut32bits(&zRec[20], return_code);
  vfslogPut32bits(&zRec[24], size);
  vfslogPut64bits(&zRec[28], offset);

  p->nBuf += VFSLOG_RECORD_SIZE;
}

static void vfslog_string(sqlite3_vfs *pVfs, const char *zStr){
  VfslogVfs *p = (VfslogVfs *)pVfs;
  unsigned char *zRec;
  int nStr = zStr ? (int)strlen(zStr) : 0;
  if( (4+nStr+p->nBuf)>sizeof(p->aBuf) ){

  VfslogVtab *p = (VfslogVtab *)pCursor->pVtab;
  int rc = SQLITE_OK;
  int nRead;

  sqlite3_free(pCsr->zTransient);
  pCsr->zTransient = 0;

  nRead = VFSLOG_RECORD_SIZE;
  if( pCsr->iOffset+nRead<=p->nByte ){
    int eEvent;
    rc = p->pFd->pMethods->xRead(p->pFd, pCsr->aBuf, nRead, pCsr->iOffset);

    eEvent = get32bits(pCsr->aBuf);
    if( (rc==SQLITE_OK)
     && (eEvent==OS_OPEN || eEvent==OS_DELETE || eEvent==OS_ACCESS) 

      }
      sqlite3_result_text(ctx, zStr, -1, SQLITE_TRANSIENT);
      break;
    }
    case 2: {
      unsigned int v1 = get32bits(&pCsr->aBuf[8]);
      unsigned int v2 = get32bits(&pCsr->aBuf[12]);
      sqlite3_result_int64(
        ctx,(((sqlite3_int64)v1) << 32) + (sqlite3_int64)v2
      );
      break;
    }
    case 6: {
      unsigned int v1 = get32bits(&pCsr->aBuf[28]);
      unsigned int v2 = get32bits(&pCsr->aBuf[32]);
      sqlite3_result_int64(
        ctx,(((sqlite3_int64)v1) << 32) + (sqlite3_int64)v2
      );
      break;
    }
    default: {
      unsigned int val = get32bits(&pCsr->aBuf[4*(i+1)]);
      sqlite3_result_int(ctx, val);
      break;
    }