C++ (Cpp) sparse_add_map Beispiele

Beispiel #1

Datei: sparse.c Projekt: Happuri/various

/* Scan the sparse file and create its map */
static bool
sparse_scan_file (struct tar_sparse_file *file)
{
  struct tar_stat_info *st = file->stat_info;
  int fd = file->fd;
  char buffer[BLOCKSIZE];
  size_t count = 0;
  off_t offset = 0;
  struct sp_array sp = {0, 0};

  st->archive_file_size = 0;

  if (ST_NBLOCKS (st->stat) == 0)
    offset = st->stat.st_size;
  else
    {
      if (!tar_sparse_scan (file, scan_begin, NULL))
	return false;

      while ((count = blocking_read (fd, buffer, sizeof buffer)) != 0
	     && count != SAFE_READ_ERROR)
	{
	  /* Analyze the block.  */
	  if (zero_block_p (buffer, count))
	    {
	      if (sp.numbytes)
		{
		  sparse_add_map (st, &sp);
		  sp.numbytes = 0;
		  if (!tar_sparse_scan (file, scan_block, NULL))
		    return false;
		}
	    }
	  else
	    {
	      if (sp.numbytes == 0)
		sp.offset = offset;
	      sp.numbytes += count;
	      st->archive_file_size += count;
	      if (!tar_sparse_scan (file, scan_block, buffer))
		return false;
	    }

	  offset += count;
	}
    }

  if (sp.numbytes == 0)
    sp.offset = offset;

  sparse_add_map (st, &sp);
  st->archive_file_size += count;
  return tar_sparse_scan (file, scan_end, NULL);
}

Beispiel #2

/* Scan the sparse file and create its map */
static bool
sparse_scan_file (struct tar_sparse_file *file)
{
  static char buffer[BLOCKSIZE];
  size_t count;
  size_t offset = 0;
  struct sp_array sp = {0, 0};

  if (!lseek_or_error (file, 0, SEEK_SET))
    return false;
  clear_block (buffer);

  file->stat_info->sparse_map_avail = 0;
  file->stat_info->archive_file_size = 0;

  if (!tar_sparse_scan (file, scan_begin, NULL))
    return false;

  while ((count = safe_read (file->fd, buffer, sizeof buffer)) != 0
	 && count != SAFE_READ_ERROR)
    {
      /* Analize the block */
      if (zero_block_p (buffer, count))
	{
	  if (sp.numbytes)
	    {
	      sparse_add_map (file, &sp);
	      sp.numbytes = 0;
	      if (!tar_sparse_scan (file, scan_block, NULL))
		return false;
	    }
	}
      else
	{
	  if (sp.numbytes == 0)
	    sp.offset = offset;
	  sp.numbytes += count;
	  file->stat_info->archive_file_size += count;
	  if (!tar_sparse_scan (file, scan_block, buffer))
	    return false;
	}

      offset += count;
      clear_block (buffer);
    }

  if (sp.numbytes == 0)
    sp.offset = offset;

  sparse_add_map (file, &sp);
  file->stat_info->archive_file_size += count;
  return tar_sparse_scan (file, scan_end, NULL);
}