mirror of
https://github.com/libretro/scummvm.git
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79 lines
1.7 KiB
C++
79 lines
1.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef COMMON_BITARRAY_H
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#define COMMON_BITARRAY_H
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#include "common/scummsys.h"
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namespace Common {
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class BitArray {
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public:
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BitArray() {
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_bitcount = 0;
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_bits = nullptr;
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}
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explicit BitArray(uint bitcount) {
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_bits = nullptr;
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set_size(bitcount);
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}
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~BitArray() {
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free(_bits);
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}
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void set_size(uint bitcount) {
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free(_bits);
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_bitcount = bitcount;
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_bits = (byte*)malloc((bitcount + 7) / 8);
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clear();
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}
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void set_bits(const byte *bits) {
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memcpy(_bits, bits, (_bitcount + 7) / 8);
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}
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void clear() {
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memset(_bits, 0, (_bitcount + 7) / 8);
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}
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void set(uint bit) {
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_bits[bit / 8] |= (1 << (bit % 8));
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}
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void unset(uint bit) {
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_bits[bit / 8] &= ~(1 << (bit % 8));
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}
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bool get(uint bit) const {
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return _bits[bit / 8] & (1 << (bit % 8));
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}
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private:
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uint _bitcount;
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byte *_bits;
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};
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} // End of namespace Common
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#endif
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