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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef COMMON_BITARRAY_H
#define COMMON_BITARRAY_H
#include "common/scummsys.h"
namespace Common {
class BitArray {
public:
BitArray() {
_bitcount = 0;
_bits = nullptr;
}
explicit BitArray(uint bitcount) {
_bits = nullptr;
set_size(bitcount);
}
~BitArray() {
free(_bits);
}
void set_size(uint bitcount) {
free(_bits);
_bitcount = bitcount;
_bits = (byte*)malloc((bitcount + 7) / 8);
clear();
}
void set_bits(const byte *bits) {
memcpy(_bits, bits, (_bitcount + 7) / 8);
}
void clear() {
memset(_bits, 0, (_bitcount + 7) / 8);
}
void set(uint bit) {
_bits[bit / 8] |= (1 << (bit % 8));
}
void unset(uint bit) {
_bits[bit / 8] &= ~(1 << (bit % 8));
}
bool get(uint bit) const {
return _bits[bit / 8] & (1 << (bit % 8));
}
uint size() const {
return _bitcount;
}
private:
uint _bitcount;
byte *_bits;
};
} // End of namespace Common
#endif
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