file.h

DVB软件,基于CT216软件的开发源程序.

/*****************************************************************************\
*              efs - General purpose Embedded Filesystem library              *
*          --------------------- -----------------------------------          *
*                                                                             *
* Filename : file.h                                                           *
* Description : Headerfile for file.c                                         *
*                                                                             *
* This library is free software; you can redistribute it and/or               *
* modify it under the terms of the GNU Lesser General Public                  *
* License as published by the Free Software Foundation; either                *
* version 2.1 of the License, or (at your option) any later version.          *
*                                                                             *
* This library is distributed in the hope that it will be useful,             *
* but WITHOUT ANY WARRANTY; without even the implied warranty of              *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU           *
* Lesser General Public License for more details.                             *
*                                                                             *
*                                                    (c)2004 Lennart Yseboodt *
*                                                    (c)2005 Michael De Nil   *
\*****************************************************************************/

#ifndef __FILE_H_
#define __FILE_H_

/*****************************************************************************/
#include "dvb_file.h"
#include "config.h"
#include "error.h"
#include "time.h"
#include "fs.h"
#include "dir.h"
#include "plibc.h"
#include "debug.h"
#include "types.h"
#include "fat.h"
/*****************************************************************************/
//#define FS_DEBUG_FILE_OPEN_TIME
//#define FS_DEBUG_FILE_CLOSE_TIME

#define MODE_READ 0x72
#define MODE_WRITE 0x77
#define MODE_APPEND 0x61

#define FILE_STATUS_OPEN 0
#define FILE_STATUS_WRITE 1

/*****************************************************************************\
 *                              File                                         
 *                             ------                                        
 * FileRecord		DirEntry		Copy of the FileRecord for this file         
 * FileLocation	Location		Location of the direntry
 * FileSystem		*fs				Pointer to the filesystem this file is on    
 * FileCache		Cache			Pointer to the cache object of the file   
 * euint8			FileStatus		Contains bitfield regarding filestatus   
 * euint32			FilePtr			Offsetpointer for fread/fwrite functions
 * euint32 		FileSize		Working copy of the filesize, always use this,
 									it is more up to date than DirEntry->FileSize,
									which is only updated when flushing to disc.
\*****************************************************************************/
struct File{
	FileRecord DirEntry;
	FileLocation Location; /* Location in directory!! */
	FileSystem *fs;
	ClusterChain stReadCache;
	ClusterChain stWriteCache;
	euint8	FileStatus;
	euint32 FilePtr;
	euint32 FileSize;
    ST_FILE_CLUSTER_CACHE   stClusterCache;
};
typedef struct File File;


esint8 file_fopen(File *file, FileSystem *fs, eint8 *filename, eint8 mode, bool8 b8FileExist, u8 u8NTRes, u32* pu32DirSector, u8* pu8DirOffset, u32* pu32FirstCluster);
esint8 file_fclose(File *file, euint8 u8Mode);
esint8 file_update_file_record(File *file, euint8 u8Mode);
esint16 file_setpos(File *file,euint32 pos);
euint32 file_fread(File *file,euint32 offset, euint32 size,euint8 *buf);
euint32 file_read (File *file,euint32 size,euint8 *buf);
euint32 file_fwrite(File* file,euint32 offset,euint32 size,euint8* buf);
euint32 file_write (File* file,euint32 size,euint8* buf); 
eint8* file_normalToFatName(eint8* filename,eint8* fatfilename);
euint8 file_validateChar(euint8 c);
void file_initFile(File *file, FileSystem *fs, FileLocation *loc);
eint16 file_allocClusterChain(File *file,euint32 num_clusters);
void file_setAttr(File* file,euint8 attribute,euint8 val);
euint8 file_getAttr(File* file,euint8 attribute);
euint32 file_requiredCluster(File *file,euint32 offset, euint32 size);
bool8 file_PreAllocSpace(File* file, u32 u32SizeBytes);
#endif