fs.cpp

Nand flash FAT16 文件系统源代码

#include "stdafx.h"
#include "fs.h"

#ifndef WIN32
typedef struct file_tag{
	int   _cnt;
    int   _file;
}FILE;
#endif 

void SCI_InitFs(void);


#define DISK_MAX_NUM  4
DISK_INFO_P gDisk[DISK_MAX_NUM];
int         gDiskCount;


#define FILE_CTRL_NUM  16
FILE   gFileCtrl[FILE_CTRL_NUM];



/**
 * void DISK_Init(void)
 *
 * update 2008/12/1
 *
 * check 0
 */
void DISK_Init(void)
{
	gDiskCount = 0;

	FS_AddFlashDisk(&gDisk[0]);
	gDisk[0]->mFInit('c');
	if(!gDisk[0]->mFIsFormat()){
		gDisk[0]->mFfomat('c');
	}
	gDiskCount++;

	SCI_InitFs();
}


/**
 * void SCI_InitFs(void)
 *
 * update 2008/12/1
 *
 * check 0
 */
void SCI_InitFs(void)
{
	for(int i=0; i<FILE_CTRL_NUM; i++){
		gFileCtrl[i]._file = 0;
		gFileCtrl[i]._cnt  = 0;
	}
}



/**
 * FILE *SCI_GetFreeFileCtrl(void)
 *
 * update 2008/12/1
 *
 * check 0
 */
FILE *SCI_GetFreeFileCtrl(void)
{
	FILE  *hFile = NULL;
	
	for(int i=0; i<FILE_CTRL_NUM; i++){
		if(0 == gFileCtrl[i]._file){
			hFile = &gFileCtrl[i];
		}
	}
	
	return( hFile );
}



/**
 * FILE *SCI_fopen(char *FileName,char *mode)
 *
 * update 2008/12/1
 *
 * check 0
 */
FILE *SCI_fopen(char *FileName,char *mode)
{
	FILE  *hFile;
	
	hFile = SCI_GetFreeFileCtrl();

	if(0 != hFile){
		hFile->_file = gDisk[hFile->_cnt]->mFopen(FileName,mode);
		if(0 == hFile->_file){
			hFile = NULL;
		}
	}

	return ( hFile );
}



/**
 * int SCI_fclose(FILE *hFile)
 *
 * update 2008/12/1
 *
 * check 0
 */
int SCI_fclose(FILE *hFile)
{
	if(NULL != hFile){
		if(0 != hFile->_file){
			gDisk[hFile->_cnt]->mFclose(hFile->_file);
			hFile->_file = 0;
		}
	}

	return(0);
}



/**
 * size_t SCI_fread( void *buffer, size_t size, size_t count, FILE *stream )
 *
 * update 2008/12/1
 *
 * check 0
 */
size_t SCI_fread( void *buffer, size_t size, size_t count, FILE *stream )
{
	int n = 0;
	if(NULL != stream ){
		if(0 != stream->_file){
			n = gDisk[stream->_cnt]->mFread((BYTE*)buffer,	size,count,	stream->_file);
		}
	}
	
	return( n );
}



/**
 * size_t SCI_fwrite( const void *buffer, size_t size, size_t count, FILE *stream )
 *
 * update 2008/12/1
 *
 * check 0
 */
size_t SCI_fwrite( const void *buffer, size_t size, size_t count, FILE *stream )
{
	int n = 0;
	if(NULL != stream ){
		if(0 != stream->_file){
			n = gDisk[stream->_cnt]->mFwrite((BYTE*)buffer,	size,count,	stream->_file);
		}
	}
	
	return( n );
}



/**
 * int SCI_feof( FILE *stream )
 *
 * update 2008/12/1
 *
 * check 0
 */
int SCI_feof( FILE *stream )
{
	int Result = 0;

	if(NULL != stream ){
		if(0 != stream->_file){
			Result = gDisk[stream->_cnt]->mFfeof( stream->_file );
		}
	}
	
	return( Result );
}



/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
/*--------调试 [e-mail]------------------------------------------------*/
/*        有BUG请指出 	[e-mail]										 */
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
#include <stdio.h>
void FS_Test(void)
{
	FILE *hFile;
	FILE *pFile;
	BYTE  ch;

	
	pFile = fopen("D:\\a.rar","rb");
	if(pFile == NULL){
		return;
	}


	hFile = SCI_fopen("C:\\a.txt","w");
	if( NULL == hFile ){
		fclose(pFile);
		return;
	}
	
	while(!feof(pFile)){
		fread(&ch,1,1,pFile);
		if(feof(pFile)){
			break;
		}
		SCI_fwrite(&ch,1,1,hFile);
	}
	SCI_fclose(hFile);
	fclose(pFile);

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	pFile = fopen("D:\\b.rar","wb");
	if(pFile == NULL){
		return;
	}

	

	hFile = SCI_fopen("C:\\a.txt","r");
	if( NULL == hFile ){
		fclose(pFile);
		return;
	}
	
	while(!SCI_feof(hFile)){
		SCI_fread(&ch,1,1,hFile);
		fwrite(&ch,1,1,pFile);
	}

	SCI_fclose(hFile);
	fclose(pFile);
}