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/****************************************************************************
(c) 2006 Melanie Thielker
This file is part of libdjconsole.
libdjconsole is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
libdjconsole 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 General Public License for
more details.
You should have received a copy of the GNU General Public License along with
libdjconsole; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
****************************************************************************/
#include "bitfield.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
class BitfieldSpec
{
public:
int byte;
unsigned char mask;
int code;
};
Bitfield::Bitfield()
{
Buffer=0;
Size=0;
Dirty=false;
}
Bitfield::Bitfield(int size)
{
Buffer=new unsigned char[size];
Size=size;
memset(Buffer, 0, Size);
}
Bitfield::~Bitfield()
{
if(Buffer != 0)
delete[] Buffer;
}
bool Bitfield::load(const char *file)
{
FILE *fp;
fp=fopen(file, "r");
if(!fp)
return false;
while(Specs.size())
{
delete Specs[0];
Specs.erase(Specs.begin());
}
char buf[1024];
while(fgets(buf, 1024, fp))
{
int byte, mask, code;
if(sscanf(buf, "%d %d %d", &byte, &mask, &code) == 3)
{
BitfieldSpec *s=new BitfieldSpec;
s->byte=byte;
s->mask=(unsigned char)(mask & 0xff);
s->code=code;
Specs.push_back(s);
}
}
fclose(fp);
return true;
}
void Bitfield::setSize(int size)
{
if(Size != 0)
return;
Buffer=new unsigned char[size];
Size=size;
memset(Buffer, 0, Size);
}
int Bitfield::size()
{
return Size;
}
const unsigned char *Bitfield::bits()
{
Dirty=false;
return Buffer;
}
void Bitfield::setBit(int code, bool on)
{
vector<BitfieldSpec *>::iterator it;
for(it=Specs.begin();it != Specs.end();++it)
{
if((*it)->code == code)
{
if((*it)->byte < 0 || (*it)->byte >= Size)
continue;
if(!on)
Buffer[(*it)->byte] &= ~(*it)->mask;
else
Buffer[(*it)->byte] |= (*it)->mask;
Dirty=true;
}
}
}
void Bitfield::clearBit(int code)
{
setBit(code, 0);
}
bool Bitfield::dirty()
{
return Dirty;
}
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