QR-Code-generator/cpp/BitBuffer.hpp

77 lines
2.1 KiB
C++

/*
* QR Code generator library (C++)
*
* Copyright (c) 2016 Project Nayuki
* https://www.nayuki.io/page/qr-code-generator-library
*
* (MIT License)
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
* - The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* - The Software is provided "as is", without warranty of any kind, express or
* implied, including but not limited to the warranties of merchantability,
* fitness for a particular purpose and noninfringement. In no event shall the
* authors or copyright holders be liable for any claim, damages or other
* liability, whether in an action of contract, tort or otherwise, arising from,
* out of or in connection with the Software or the use or other dealings in the
* Software.
*/
#pragma once
#include <cstdint>
#include <vector>
#include "QrSegment.hpp"
namespace qrcodegen {
/*
* An appendable sequence of bits. Bits are packed in big endian within a byte.
*/
class BitBuffer final {
/*---- Fields ----*/
private:
std::vector<uint8_t> data;
int bitLength;
/*---- Constructor ----*/
public:
// Creates an empty bit buffer (length 0).
BitBuffer();
/*---- Methods ----*/
public:
// Returns the number of bits in the buffer, which is a non-negative value.
int getBitLength() const;
// Returns a copy of all bytes, padding up to the nearest byte.
std::vector<uint8_t> getBytes() const;
// Appends the given number of bits of the given value to this sequence.
// If 0 <= len <= 31, then this requires 0 <= val < 2^len.
void appendBits(uint32_t val, int len);
// Appends the data of the given segment to this bit buffer.
void appendData(const QrSegment &seg);
};
}