120 lines
4.8 KiB
C
120 lines
4.8 KiB
C
/*****************************************************************************\
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* EFSL - Embedded Filesystems Library *
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* ----------------------------------- *
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* *
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* Filename : ioman_small.c *
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* Release : 0.3 - devel *
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* Description : The IO Manager receives all requests for sectors in a central *
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* allowing it to make smart decision regarding caching. *
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* The IOMAN_NUMBUFFER parameter determines how many sectors *
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* ioman can cache. ioman also supports overallocating and *
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* backtracking sectors. *
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* This is the small version of IOMan, for systems with limited *
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* resources. It features only one fixed buffer, and has *
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* simplified operation *
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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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#include "ioman_small.h"
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esint8 ioman_init(IOManager *ioman, Interface *iface, euint8* bufferarea)
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{
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ioman->iface=iface;
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ioman_reset(ioman);
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return(0);
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}
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/*****************************************************************************/
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void ioman_reset(IOManager *ioman)
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{
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ioman->sector=ioman->status=ioman->itptr=0;
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ioman->stack.sector=ioman->stack.status=0;
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ioman_setError(ioman,IOMAN_NOERROR);
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}
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/*****************************************************************************/
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void ioman_setAttr(IOManager *ioman,euint8 attribute,euint8 val)
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{
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if(val){
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ioman->status|=1<<attribute;
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}else{
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ioman->status&=~(1<<attribute);
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}
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}
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/*****************************************************************************/
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euint8 ioman_getAttr(IOManager *ioman,euint8 attribute)
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{
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return(ioman->status&(1<<attribute));
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}
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/*****************************************************************************/
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euint8* ioman_getSector(IOManager *ioman,euint32 address, euint8 mode)
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{
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if(address==ioman->sector){
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if(mode==IOM_MODE_READWRITE)ioman_setWritable();
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return(ioman->bufptr);
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}
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}
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esint8 ioman_readSector(IOManager *ioman,euint32 address,euint8* buf)
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{
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esint8 r;
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if(buf==0){
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return(-1);
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}
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r=if_readBuf(ioman->iface,address,buf);
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if(r!=0){
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ioman_setError(ioman,IOMAN_ERR_READFAIL);
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return(-1);
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}
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return(0);
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}
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/*****************************************************************************/
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esint8 ioman_writeSector(IOManager *ioman, euint32 address, euint8* buf)
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{
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esint8 r;
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if(buf==0)return(-1);
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r=if_writeBuf(ioman->iface,address,buf);
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if(r<=0){
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ioman_setError(ioman,IOMAN_ERR_WRITEFAIL);
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return(-1);
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}
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return(0);
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}
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/*****************************************************************************/
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