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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 */
56