/*

* Copyright 2016 Nu-book Inc.

* Copyright 2016 ZXing authors

*/

// SPDX-License-Identifier: Apache-2.0

#include "BitArray.h"

#include "ByteArray.h"

#include <cstddef>

#include <stdexcept>

namespace ZXing {

void

BitArray::bitwiseXOR(const BitArray& other)

{

if (size() != other.size()) {

throw std::invalid_argument("BitArray::xor(): Sizes don't match");

}

for (size_t i = 0; i < _bits.size(); i++) {

// The last int could be incomplete (i.e. not have 32 bits in

// it) but there is no problem since 0 XOR 0 == 0.

_bits[i] ^= other._bits[i];

}

}

ByteArray BitArray::toBytes(int bitOffset, int numBytes) const

{

ByteArray res(numBytes == -1 ? (size() - bitOffset + 7) / 8 : numBytes);

for (int i = 0; i < Size(res); i++)

for (int j = 0; j < 8; j++)

AppendBit(res[i], (numBytes != -1 || bitOffset < size()) ? get(bitOffset++) : 0);

return res;

}

} // ZXing