91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
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#ifndef __FAT_H__
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#define __FAT_H__
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typedef struct {
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unsigned char Drive; //useless
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unsigned char FlagsNT;
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unsigned char Signature; // 0x28 or 0x29
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unsigned SerialNumber;
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char VolumeLabel[11];
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char SysIDString[8]; // unreliable
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} __attribute__((packed)) BPB_EXT_16;
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typedef struct {
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unsigned SectorsPerFAT;
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unsigned short Flags;
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unsigned short Version;
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unsigned ClusterOfRootDirectory;
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unsigned short ClusterOfFSInfo;
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unsigned short ClusterOfBackupBootSector;
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unsigned char Reserved[12]; // Should be 0 at format
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unsigned char Drive;
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unsigned char FlagsNT;
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unsigned char Signature; // 0x28 or 0x29
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unsigned SerialNumber;
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char VolumeLabel[11];
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char SysIDString[8]; // always FAT12
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} __attribute__((packed)) BPB_EXT_32;
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typedef struct {
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unsigned char _ignore[3];
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// Bios Parameter Block
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char OEMIdentify[8];
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unsigned short BytesPerSector;
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unsigned char SectorsPerCluster;
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unsigned short ReservedSectors;
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unsigned char NumberOfFATs;
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unsigned short NumberOfDirectoryEntries;
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unsigned short NumberOfSectors;
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unsigned char MediaDescriptorType;
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unsigned short SectorsPerFAT;
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unsigned short SectorsPerTrack;
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unsigned short HeadsPerCylinder;
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unsigned HiddenSectors;
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unsigned NumberOfSectorsLong;
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union {
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BPB_EXT_16 Ext16;
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BPB_EXT_32 Ext32;
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} Extended;
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} __attribute__((packed)) FATBootSector, *FATBootSectorPointer;
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typedef struct {
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unsigned NumberOfSectors;
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unsigned SizeOfSector;
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unsigned FatOffset;
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unsigned NumberOfRootEntries;
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unsigned RootOffset;
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unsigned SizeOfRoot;
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unsigned SizeOfFat;
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unsigned SizeOfFatEntry;
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unsigned SizeOfCluster;
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void (*ReadSector) (void* buffer, int lba);
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} FatMountInfo, *FatMountInfoPointer;
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typedef struct {
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char FileName[8];
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char Extension[3];
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unsigned char Atributes;
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unsigned char Reserved;
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unsigned char CreateTimeFine;
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unsigned short CreateTime;
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unsigned short CreateDate;
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unsigned short LastAccessedDate;
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unsigned short EAIndex;
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unsigned short LastModifiedTime;
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unsigned short LastModifiedDate;
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unsigned short FirstCluster;
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unsigned FileSize;
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} __attribute__((packed)) FatDirectoryEntry, *FatDirectoryEntryPointer;
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extern FatMountInfo FloppyMount(int drive);
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#endif
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