fat.h

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#ifndef FILESYS_FAT_H
#define FILESYS_FAT_H
 
#include "devices/disk.h"
#include "filesys/file.h"
#include <inttypes.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
 
typedef uint32_t cluster_t;  /* Index of a cluster within FAT. */
 
#define FAT_MAGIC 0xEB3C9000 /* MAGIC string to identify FAT disk */
#define EOChain 0x0FFFFFFF   /* End of cluster chain */
 
/* Sectors of FAT information. */
#define SECTORS_PER_CLUSTER 1 /* Number of sectors per cluster */
#define FAT_BOOT_SECTOR 0     /* FAT boot sector. */
#define ROOT_DIR_CLUSTER 1    /* Cluster for the root directory */
 
void fat_init (void);
void fat_open (void);
void fat_close (void);
void fat_create (void);
void fat_close (void);
 
cluster_t fat_create_chain (
    cluster_t clst /* Cluster # to stretch, 0: Create a new chain */
);
void fat_remove_chain (
    cluster_t clst, /* Cluster # to be removed */
    cluster_t pclst /* Previous cluster of clst, 0: clst is the start of chain */
);
cluster_t fat_get (cluster_t clst);
void fat_put (cluster_t clst, cluster_t val);
disk_sector_t cluster_to_sector (cluster_t clst);
 
#endif /* filesys/fat.h */