ReadBuffer.hpp

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// Copyright (C) 2021 COGIP Robotics association <cogip35@gmail.com>
// This file is subject to the terms and conditions of the GNU Lesser
// General Public License v2.1. See the file LICENSE in the top level
// directory for more details.
 
 
#pragma once
 
#include <cstdint>
#include <cstddef>
#include "canpb.hpp"
#include "ReadBufferInterface.h"
 
#define CANPB_BASE64_DECODE_BUFFER_SIZE (CANPB_INPUT_MESSAGE_LENGTH_MAX * 2)
 
namespace cogip {
 
namespace canpb {
 
class ReadBuffer : public EmbeddedProto::ReadBufferInterface
{
public:
    ReadBuffer();
 
    ~ReadBuffer() override = default;
 
    uint32_t get_size() const override;
 
    uint32_t get_max_size() const override;
 
    bool peek(uint8_t &byte) const override;
 
    bool advance() override;
 
    bool advance(const uint32_t n) override;
 
    bool pop(uint8_t &byte) override;
 
    uint8_t * get_data_array();
 
    uint32_t & get_bytes_written();
 
    void clear();
 
    bool push(uint8_t &byte);
 
    size_t base64_decode();
 
    uint8_t * get_base64_data();
 
private:
    uint8_t data_[CANPB_INPUT_MESSAGE_LENGTH_MAX];
    uint8_t base64_data_[CANPB_BASE64_DECODE_BUFFER_SIZE];
    uint32_t write_index_;
    uint32_t read_index_;
};
 
} // namespace canpb
 
} // namespace cogip