libfat/libfatint.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2004 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 /*
  14  * libfatint.h
  15  *
  16  * Internals for the libfat filesystem
  17  */
  18
  19 #ifndef LIBFATINT_H
  20 #define LIBFATINT_H
  21
  22 #include "libfat.h"
  23 #include "fat.h"
  24
  25 struct libfat_sector {
  26   libfat_sector_t n;            /* Sector number */
  27   struct libfat_sector *next;   /* Next in list */
  28   char data[LIBFAT_SECTOR_SIZE];
  29 };
  30
  31 enum fat_type {
  32   FAT12,
  33   FAT16,
  34   FAT28
  35 };
  36
  37 struct libfat_filesystem {
  38   int (*read)(intptr_t, void *, size_t, libfat_sector_t);
  39   intptr_t readptr;
  40
  41   enum fat_type fat_type;
  42   unsigned int clustsize;
  43   int clustshift;
  44   int32_t endcluster;           /* Highest legal cluster number + 1 */
  45   int32_t rootcluster;          /* Root directory cluster */
  46
  47   libfat_sector_t fat;          /* Start of FAT */
  48   libfat_sector_t rootdir;      /* Start of root directory */
  49   libfat_sector_t data;         /* Start of data area */
  50   libfat_sector_t end;          /* End of filesystem */
  51
  52   struct libfat_sector *sectors;
  53 };
  54
  55 #endif /* LIBFATINT_H */