113 lines
5.5 KiB
C
113 lines
5.5 KiB
C
/*****************************************************************************\
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* efs - General purpose Embedded Filesystem library *
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* --------------------- ----------------------------------- *
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* *
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* Filename : linuxfile.c *
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* Description : This file contains the functions needed to use efs for *
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* accessing files under linux. This interface is meant *
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* to be used for debugging purposes. *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; version 2 *
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* of the License. *
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*
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* As a special exception, if other files instantiate templates or *
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* use macros or inline functions from this file, or you compile this *
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* file and link it with other works to produce a work based on this file, *
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* this file does not by itself cause the resulting work to be covered *
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* by the GNU General Public License. However the source code for this *
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* file must still be made available in accordance with section (3) of *
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* the GNU General Public License. *
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* *
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* This exception does not invalidate any other reasons why a work based *
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* on this file might be covered by the GNU General Public License. *
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* *
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* (c)2006 Lennart Yseboodt *
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* (c)2006 Michael De Nil *
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\*****************************************************************************/
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/*****************************************************************************/
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#include "interfaces/linuxfile.h"
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/*****************************************************************************/
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/* ****************************************************************************
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* short if_initInterface(hwInterface* file, char* fileName)
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* Description: This function should bring the hardware described in file in a
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* ready state to receive and retrieve data.
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* Return value: Return 0 on succes and -1 on failure.
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*/
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esint8 if_initInterface(hwInterface* file, eint8* fileName)
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{
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eint32 sc;
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Fopen(&(file->imageFile),fileName);
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sc=getFileSize(file->imageFile);
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file->sectorCount=sc/512;
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file->readCount=file->writeCount=0;
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if(sc%512!=0)
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file->sectorCount--;
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return(0);
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}
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/*****************************************************************************/
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/* ****************************************************************************
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* short if_readBuf(hwInterface* file,unsigned long address,unsigned char* buf)
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* Description: This function should fill the characterpointer buf with 512
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* bytes, offset by address*512 bytes. Adress is thus a LBA address.
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* Return value: Return 0 on success and -1 on failure.
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*/
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esint8 if_readBuf(hwInterface* file,euint32 address,euint8* buf)
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{
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/*printf("READ %li\n",address);*/
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if(if_setPos(file,address))return(-1);
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if( fread((void*)buf,512,1,file->imageFile) != 1) return(-1);
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file->readCount++;
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return(0);
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}
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/*****************************************************************************/
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/* ****************************************************************************
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* short if_writeBuf(hwInterface* file,unsigned long address,unsigned char* buf)
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* Description: This function writes 512 bytes from uchar* buf to the hardware
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* disc described in file. The write offset should be address sectors of 512 bytes.
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* Return value: Return 0 on success and -1 on failure.
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*/
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esint8 if_writeBuf(hwInterface* file,euint32 address,euint8* buf)
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{
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/*printf("WRITE %li\n",address);*/
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if_setPos(file,address);
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if((fwrite((void*)buf,512,1,file->imageFile))!=1){
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perror("cf_writeBuf:");
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exit(-1);
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}
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fflush(file->imageFile);
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file->writeCount++;
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return(0);
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}
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/*****************************************************************************/
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/* ****************************************************************************
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* short if_setPos(hwInterface* file,unsigned long address)
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* Description: This function may or may not be required. It would set the write
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* or read buffer offset by 512*address bytes from the beginning of the disc.
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* Return value: Return 0 on success and -1 on failure.
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*/
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esint8 if_setPos(hwInterface* file,euint32 address)
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{
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if(address>(file->sectorCount-1)){
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DBG((TXT("Illegal address\n")));
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exit(-1);
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}
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if((fseek(file->imageFile,512*address,SEEK_SET))!=0){
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perror("cf_setPos:");
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exit(-1);
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}
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return(0);
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}
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/*****************************************************************************/
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