// vfs.h
// Author: Josh Holtrop
// Date: 03/11/04
// Modified: 03/16/04

#ifndef __HOS_VFS__
#define __HOS_VFS__ __HOS_VFS__

#include "hos_defines.h"

#define VFS_LABEL_LENGTH 8

typedef struct
{
	void	*diskDevice;			//pointer to device-dependent structure
	int	length;				//size of the volume in bytes
	int	deviceType;			//one of VFS_DISK_TYPES
	int	fsType;				//one of VFS_FS_TYPES
	char	label[VFS_LABEL_LENGTH];	//descriptive volume label
	void	*link;				//link to next volume in linked list
} Volume;

typedef struct
{
	dword	location;			//location used by disk driver
	dword	dataLocation;			//location used by disk driver
	dword	position;			//read/write position in file
	dword	attributes;			//read/write
	dword	fileSize;			//number of bytes the file takes
	Volume	*vol;				//what volume this file is on
} FILE;

typedef struct
{
	char *device;
	char *mount;
	void *mp;
} MountPoint;

#define FILE_READ 1
#define FILE_WRITE 2
#define FILE_READ_WRITE 3

enum VFS_DISK_TYPES {VFS_NODISK, VFS_RD, VFS_FD, VFS_HD, VFS_LOOP, VFS_NUM_DISK_TYPES};
enum VFS_FS_TYPES {VFS_NOFS, VFS_VFAT, VFS_EXT2, VFS_NUM_FS_TYPES};

void vfs_init();
Volume *vfs_newVolume();
Volume *vfs_getLastVolume();
int vfs_readSector(Volume *vol, dword sector, byte *buffer);
int vfs_writeSector(Volume *vol, dword sector, byte *buffer);
int vfs_readSectorn(Volume *vol, dword sector, byte *buffer, int n);
int vfs_writeSectorn(Volume *vol, dword sector, byte *buffer, int n);
int vfs_readFileBlock(Volume *vol, char *file, dword start, byte *buffer, dword blockSize);
int vfs_writeFileBlock(Volume *vol, char *file, dword start, byte *buffer, dword blockSize);

#endif