// Ext2OpenFile.h
// Author: Josh Holtrop
// Date: 12/26/05
// Modified: 12/26/05

#ifndef __HOS_EXT2OPENFILE__
#define __HOS_EXT2OPENFILE__ __HOS_EXT2OPENFILE__

#include "ext2.h"
#include "fs/OpenFile.h"
#include "Ext2BlockCache.h"

class Ext2OpenFile : public OpenFile
{
protected:
	Ext2fs	*myFS;
	u32_t	myInum;
	int	myMode;
	int	myBeenTruncated;	/* set true when the file truncated */
	u32_t	myPosition;
	u32_t	myBlockSize;
	Ext2BlockCache	*myCache;
	ext2_inode_t	myInode;
	u8_t	*myBlockCache;
	u32_t	myBlockCacheBlock;
	int	myBlockCacheStatus;	/* 0: invalid; 1: valid; 2: dirty */

	void	updateCache(u32_t blockNum);

public:
	Ext2OpenFile(Ext2fs *fs, u32_t inum, int mode);
	~Ext2OpenFile();
	int	seek(int pos, int mode);
	int	read();
	int	read(void *buf, u32_t num);
	int	write(int chr);
	int	write(void *buf, u32_t num);
	void	notifyTruncated();
};

typedef struct
{
	u32_t		inode;
	Ext2OpenFile	*ofile;
} Ext2OpenFileHandle;

#endif