libfat/libfatint.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2004-2008 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 */