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72 lines
2.4 KiB
72 lines
2.4 KiB
/*
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* QR Code generator library (C++)
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*
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* Copyright (c) Project Nayuki. (MIT License)
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* https://www.nayuki.io/page/qr-code-generator-library
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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* - The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* - The Software is provided "as is", without warranty of any kind, express or
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* implied, including but not limited to the warranties of merchantability,
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* fitness for a particular purpose and noninfringement. In no event shall the
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* authors or copyright holders be liable for any claim, damages or other
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* liability, whether in an action of contract, tort or otherwise, arising from,
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* out of or in connection with the Software or the use or other dealings in the
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* Software.
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*/
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#include <climits>
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#include <cstddef>
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#include "BitBuffer.hpp"
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namespace qrcodegen {
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BitBuffer::BitBuffer() :
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data(),
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bitLength(0) {}
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int BitBuffer::getBitLength() const {
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return bitLength;
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}
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std::vector<uint8_t> BitBuffer::getBytes() const {
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return data;
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}
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void BitBuffer::appendBits(uint32_t val, int len) {
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if (len < 0 || len > 32 || (len < 32 && (val >> len) != 0))
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throw "Value out of range";
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if (len > INT_MAX - bitLength)
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throw "Buffer too long";
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unsigned int newByteLen = ((unsigned int)bitLength + len + 7) / 8;
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while (data.size() < newByteLen)
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data.push_back(0);
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for (int i = len - 1; i >= 0; i--, bitLength++) // Append bit by bit
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data.at(bitLength >> 3) |= ((val >> i) & 1) << (7 - (bitLength & 7));
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}
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void BitBuffer::appendData(const QrSegment &seg) {
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if (seg.bitLength > INT_MAX - bitLength)
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throw "Buffer too long";
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unsigned int newByteLen = ((unsigned int)bitLength + seg.bitLength + 7) / 8;
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while (data.size() < newByteLen)
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data.push_back(0);
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for (int i = 0; i < seg.bitLength; i++, bitLength++) { // Append bit by bit
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int bit = (seg.data.at(i >> 3) >> (7 - (i & 7))) & 1;
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data.at(bitLength >> 3) |= bit << (7 - (bitLength & 7));
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}
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}
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}
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