39 lines
884 B
C++
39 lines
884 B
C++
/*
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* Copyright 2016 Nu-book Inc.
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* Copyright 2016 ZXing authors
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*/
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// SPDX-License-Identifier: Apache-2.0
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#include "BitArray.h"
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#include "ByteArray.h"
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#include <cstddef>
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#include <stdexcept>
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namespace ZXing {
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void
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BitArray::bitwiseXOR(const BitArray& other)
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{
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if (size() != other.size()) {
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throw std::invalid_argument("BitArray::xor(): Sizes don't match");
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}
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for (size_t i = 0; i < _bits.size(); i++) {
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// The last int could be incomplete (i.e. not have 32 bits in
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// it) but there is no problem since 0 XOR 0 == 0.
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_bits[i] ^= other._bits[i];
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}
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}
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ByteArray BitArray::toBytes(int bitOffset, int numBytes) const
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{
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ByteArray res(numBytes == -1 ? (size() - bitOffset + 7) / 8 : numBytes);
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for (int i = 0; i < Size(res); i++)
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for (int j = 0; j < 8; j++)
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AppendBit(res[i], (numBytes != -1 || bitOffset < size()) ? get(bitOffset++) : 0);
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return res;
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}
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} // ZXing
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