// fat12.h
// Author: Josh Holtrop
// Created: 01/04/04


typedef struct	{
	char	fileName[8];
	char	ext[3];
	byte	attributes;
	dword	createTime;
	word	createDate;
	word	accessDate;
	word	unused0;
	word	modifiedDate;
	word	modifiedTime;
	word	firstCluster;
	dword	fileSize;
} __attribute__((packed)) Fat12Entry;

typedef struct	{
	byte	jump[3];
	byte	sysName[8];
	word    bytesPerSector;
	byte	sectorsPerCluster;
	word	reservedSectors;
	byte	FATcount;
	word	maxRootEntries;
	word	totalSectors1;
	byte	mediaDescriptor;
	word	sectorsPerFAT;
	word	sectorsPerTrack;
	word	headCount;
	dword	hiddenSectors;
	dword	totalSectors2;
	byte	driveNumber;
	byte	reserved1;
	byte	extBootSignature;
	dword	volumeSerial;
	char	volumeLabel[11];
	char	fileSystemID[8];
} __attribute__((packed)) Fat12BootSector;


byte *fat12_readFile(char *fileName, DiskDevice *dd);
dword	fat12_getFileHandle(char *fileName, DiskDevice *dd, Fat12Entry *destination);
dword	fat12_getDirectoryHandle(char *directory, DiskDevice *dd, Fat12Entry *currDir, Fat12Entry *destination);
Fat12Entry *fat12_readClusterChain(DiskDevice *dd, Fat12Entry *directory);
dword	fat12_getFileHandleInDirectory(char *fileName, DiskDevice *dd, Fat12Entry *currDir, Fat12Entry *destination);
dword	fat12_readClusterChainCount(DiskDevice *dd, Fat12Entry *directory);
dword	fat12_getFileSize(char *fileName, DiskDevice *dd);
dword	getClusterChain(DiskDevice *dd);
dword	fat12_getNextCluster(dword thisCluster);

byte	*clusterChain = 0;