off_t n;
OFF_T n;
int sqlitepager_pagecount(Pager *pPager){  off_t n;  assert( pPager!=0 );  if( pPager->dbSize>=0 ){    return pPager->dbSize;  }  if( sqliteOsFileSize(&pPager->fd, &n)!=SQLITE_OK ){    pPager->errMask |= PAGER_ERR_DISK;    return 0;  }  n /= SQLITE_PAGE_SIZE;  if( pPager->state!=SQLITE_UNLOCK ){    pPager->dbSize = n;  }  return n;}