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71 lines
2 KiB
C++
71 lines
2 KiB
C++
// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
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#ifndef __BIT_ARRAY_H__
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#define __BIT_ARRAY_H__
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/*
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* Copyright 2010 ZXing authors. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <zxing/common/Counted.h>
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#include <zxing/common/IllegalArgumentException.h>
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#include <vector>
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#include <limits>
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namespace zxing {
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#define ZX_LOG_DIGITS(digits) \
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((digits == 8) ? 3 : \
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((digits == 16) ? 4 : \
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((digits == 32) ? 5 : \
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((digits == 64) ? 6 : \
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((digits == 128) ? 7 : \
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(-1))))))
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class BitArray : public Counted {
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private:
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size_t size_;
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std::vector<unsigned int> bits_;
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static const unsigned int bitsPerWord_ =
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std::numeric_limits<unsigned int>::digits;
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static const unsigned int logBits_ = ZX_LOG_DIGITS(bitsPerWord_);
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static const unsigned int bitsMask_ = (1 << logBits_) - 1;
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static size_t wordsForBits(size_t bits);
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explicit BitArray();
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public:
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BitArray(size_t size);
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~BitArray();
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size_t getSize();
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bool get(size_t i) {
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return (bits_[i >> logBits_] & (1 << (i & bitsMask_))) != 0;
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}
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void set(size_t i) {
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bits_[i >> logBits_] |= 1 << (i & bitsMask_);
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}
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void setBulk(size_t i, unsigned int newBits);
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void setRange(int start, int end);
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void clear();
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bool isRange(size_t start, size_t end, bool value);
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std::vector<unsigned int>& getBitArray();
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void reverse();
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};
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}
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#endif // __BIT_ARRAY_H__
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