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/*
Copyright (C) 2004 by Jasem Mutlaq
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.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "PPort.h"
#include "port.h"
#include <unistd.h>
#include <sys/types.h>
#include <iostream>
using namespace std;
#define TEST_VALIDITY {if (this==NULL) return false;}
PPort::PPort() {
reset();
}
PPort::PPort(int ioPort) {
reset();
setPort(ioPort);
}
void PPort::reset() {
bitArray=0;
for (int i=0;i<8;++i) {
assignedBit[i]=NULL;
}
currentPort=NULL;
}
bool PPort::setPort(int ioPort) {
TEST_VALIDITY;
if (geteuid() != 0) {
cerr << "must be setuid root control parallel port"<<endl;
return false;
}
if (currentPort) {
delete currentPort;
}
reset();
currentPort=new port_t(ioPort);
return commit();
}
bool PPort::commit() {
TEST_VALIDITY;
if (currentPort) {
currentPort->write_data(bitArray);
return true;
} else {
return false;
}
}
bool PPort::setBit(const void * ID,int bit,bool stat) {
TEST_VALIDITY;
if (ID != assignedBit[bit]) {
return false;
}
if (stat) {
bitArray |= (1<<bit);
} else {
bitArray &= ~(1<<bit);
}
return true;
}
bool PPort::registerBit(const void * ID,int bit) {
TEST_VALIDITY;
if (assignedBit[bit] || currentPort==NULL) {
return false;
}
assignedBit[bit]=ID;
return true;
}
bool PPort::unregisterBit(const void * ID,int bit) {
TEST_VALIDITY;
if (assignedBit[bit] != ID) {
return false;
}
assignedBit[bit]=NULL;
return true;
}
bool PPort::isRegisterBit(const void * ID,int bit) const {
TEST_VALIDITY;
return (assignedBit[bit] == ID);
}
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