Subversion Repositories HelenOS

#include "../../vfs/vfs.h"

#include <stdint.h>

#define FAT1        0

#define FAT_CLST_RES0   0x0000

#define FAT_CLST_RES1   0x0001

#define FAT_CLST_FIRST  0x0002

#define FAT_CLST_BAD    0xfff7

#define FAT_CLST_LAST1  0xfff8

#define FAT_CLST_LAST8  0xffff

/* internally used to mark root directory's parent */

#define FAT_CLST_ROOTPAR    FAT_CLST_RES0

/* internally used to mark root directory */

#define FAT_CLST_ROOT       FAT_CLST_RES1

/* forward declarations */

struct block;

struct fat_node;

typedef uint16_t fat_cluster_t;

#define fat_block_get(np, off) \

    _fat_block_get((np)->idx->dev_handle, (np)->firstc, (off))

extern struct block *_fat_block_get(dev_handle_t, fat_cluster_t, off_t);

extern uint16_t _fat_blcks_get(dev_handle_t, fat_cluster_t);

extern uint16_t fat_bps_get(dev_handle_t);

extern void fat_append_clusters(struct fat_node *, fat_cluster_t);

extern int fat_alloc_clusters(dev_handle_t, unsigned, fat_cluster_t *,

    fat_cluster_t *);

extern void fat_alloc_shadow_clusters(dev_handle_t, fat_cluster_t *, unsigned);

extern void fat_mark_cluster(dev_handle_t, unsigned, fat_cluster_t,

    fat_cluster_t);

extern void fat_fill_gap(struct fat_node *, fat_cluster_t, off_t);