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#ifndef _H_FAT_
#define _H_FAT_
#define MSDOS_SUPER_MAGIC 0x4d44 /* MD */
#if 0
/* FAT bootsector format, also used by other disk-based derivatives */
struct boot_sector {
uint8_t bsJump[3];
char bsOemName[8];
uint16_t bsBytesPerSec;
uint8_t bsSecPerClust;
uint16_t bsResSectors;
uint8_t bsFATs;
uint16_t bsRootDirEnts;
uint16_t bsSectors;
uint8_t bsMedia;
uint16_t bsFATsecs;
uint16_t bsSecPerTrack;
uint16_t bsHeads;
uint32_t bsHiddenSecs;
uint32_t bsHugeSectors;
union {
struct {
uint8_t DriveNumber;
uint8_t Reserved1;
uint8_t BootSignature;
uint32_t VolumeID;
char VolumeLabel[11];
char FileSysType[8];
uint8_t Code[442];
} __attribute__ ((packed)) bs16;
struct {
uint32_t FATSz32;
uint16_t ExtFlags;
uint16_t FSVer;
uint32_t RootClus;
uint16_t FSInfo;
uint16_t BkBootSec;
uint8_t Reserved0[12];
uint8_t DriveNumber;
uint8_t Reserved1;
uint8_t BootSignature;
uint32_t VolumeID;
char VolumeLabel[11];
char FileSysType[8];
uint8_t Code[414];
} __attribute__ ((packed)) bs32;
} __attribute__ ((packed));
uint32_t NextSector; /* Pointer to the first unused sector */
uint16_t MaxTransfer; /* Max sectors per transfer */
uint16_t bsSignature;
} __attribute__ ((packed));
#define bsHead bsJump
#define bsHeadLen offsetof(struct boot_sector, bsOemName)
#define bsCode bs32.Code /* The common safe choice */
#define bsCodeLen (offsetof(struct boot_sector, bsSignature) - \
offsetof(struct boot_sector, bsCode))
#endif
#endif
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