src/add-ons/kernel/file_systems/fat/fat.h

   1 /*
   2         Copyright 1999-2001, Be Incorporated.   All Rights Reserved.
   3         This file may be used under the terms of the Be Sample Code License.
   4 */
   5 #ifndef _DOSFS_FAT_H_
   6 #define _DOSFS_FAT_H_
   7
   8
   9 #include "dosfs.h"
  10
  11
  12 #define vIS_DATA_CLUSTER(vol,cluster) (((cluster) >= 2) && ((cluster) < vol->total_clusters + 2))
  13 #define IS_DATA_CLUSTER(cluster) vIS_DATA_CLUSTER(vol,cluster)
  14
  15 // cluster 1 represents root directory for fat12 and fat16
  16 #define IS_FIXED_ROOT(cluster) ((cluster) == 1)
  17
  18 int32           count_free_clusters(nspace *vol);
  19 int32           get_nth_fat_entry(nspace *vol, int32 cluster, uint32 n);
  20 uint32          count_clusters(nspace *vol, int32 cluster);
  21
  22 /* remember to update vnode iteration after calling this function */
  23 status_t        clear_fat_chain(nspace *vol, uint32 cluster,
  24                                 bool discardBlockCache);
  25
  26 /* remember to set end of chain field when merging into a vnode */
  27 status_t        allocate_n_fat_entries(nspace *vol, int32 n, int32 *start);
  28
  29 /* remember to update vnode iteration after calling this function */
  30 status_t        set_fat_chain_length(nspace *vol, vnode *node, uint32 clusters,
  31                                 bool discardBlockCache);
  32
  33 void            dump_fat_chain(nspace *vol, uint32 cluster);
  34
  35 status_t        fragment(nspace *vol, uint32 *pattern);
  36
  37 #endif