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Sourcecode: parted version File versions

fatio.c

/*
    libparted
    Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "fat.h"
#include "fatio.h"

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>

#ifndef DISCOVER_ONLY

int
fat_read_fragments (PedFileSystem* fs, char* buf, FatFragment frag,
                FatFragment count)
{
      FatSpecific*      fs_info = FAT_SPECIFIC (fs);
      PedSector   sector = fat_frag_to_sector (fs, frag);
      PedSector   sector_count = count * fs_info->frag_sectors;

      PED_ASSERT (frag >= 0 && frag < fs_info->frag_count, return 0);

      return ped_geometry_read (fs->geom, buf, sector, sector_count);
}

int
fat_read_fragment (PedFileSystem* fs, char* buf, FatFragment frag)
{
      return fat_read_fragments (fs, buf, frag, 1);
}

int
fat_write_fragments (PedFileSystem* fs, char* buf, FatFragment frag,
                 FatFragment count)
{
      FatSpecific*      fs_info = FAT_SPECIFIC (fs);
      PedSector   sector = fat_frag_to_sector (fs, frag);
      PedSector   sector_count = count * fs_info->frag_sectors;

      PED_ASSERT (frag >= 0 && frag < fs_info->frag_count, return 0);

      return ped_geometry_write (fs->geom, buf, sector, sector_count);
}

int
fat_write_fragment (PedFileSystem* fs, char* buf, FatFragment frag)
{
      return fat_write_fragments (fs, buf, frag, 1);
}

int
fat_write_sync_fragments (PedFileSystem* fs, char* buf, FatFragment frag,
                    FatFragment count)
{
      if (!fat_write_fragments (fs, buf, frag, count))
            return 0;
      if (!ped_geometry_sync (fs->geom))
            return 0;
      return 1;
}

int
fat_write_sync_fragment (PedFileSystem* fs, char* buf, FatFragment frag)
{
      return fat_write_sync_fragments (fs, buf, frag, 1);
}

int
fat_read_clusters (PedFileSystem* fs, char *buf, FatCluster cluster,
               FatCluster count)
{
      FatSpecific*      fs_info = FAT_SPECIFIC (fs);
      PedSector   sector = fat_cluster_to_sector (fs, cluster);
      PedSector   sector_count = count * fs_info->cluster_sectors;

      PED_ASSERT (cluster >= 2
                && cluster + count - 1 < fs_info->cluster_count + 2,
                return 0);

      return ped_geometry_read (fs->geom, buf, sector, sector_count);
}

int
fat_read_cluster (PedFileSystem* fs, char *buf, FatCluster cluster)
{
      return fat_read_clusters (fs, buf, cluster, 1);
}

int
fat_write_clusters (PedFileSystem* fs, char *buf, FatCluster cluster,
                FatCluster count)
{
      FatSpecific*      fs_info = FAT_SPECIFIC (fs);
      PedSector   sector = fat_cluster_to_sector (fs, cluster);
      PedSector   sector_count = count * fs_info->cluster_sectors;

      PED_ASSERT (cluster >= 2
                && cluster + count - 1 < fs_info->cluster_count + 2,
                return 0);

      return ped_geometry_write (fs->geom, buf, sector, sector_count);
}

int
fat_write_cluster (PedFileSystem* fs, char *buf, FatCluster cluster)
{
      return fat_write_clusters (fs, buf, cluster, 1);
}

int
fat_write_sync_clusters (PedFileSystem* fs, char *buf, FatCluster cluster,
                   FatCluster count)
{
      if (!fat_write_clusters (fs, buf, cluster, count))
            return 0;
      if (!ped_geometry_sync (fs->geom))
            return 0;
      return 1;
}

int
fat_write_sync_cluster (PedFileSystem* fs, char *buf, FatCluster cluster)
{
      if (!fat_write_cluster (fs, buf, cluster))
            return 0;
      if (!ped_geometry_sync (fs->geom))
            return 0;
      return 1;
}

#endif /* !DISCOVER_ONLY */

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