comm_buffers.h

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/***************************************************************************
 *   Copyright (C) 2024 Alec Leamas                                        *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
 **************************************************************************/
 
#ifndef _COMM_BUFFERS_H__
#define _COMM_BUFFERS_H__
 
#include <deque>
#include <mutex>
#include <string>
#include <vector>
 
#ifdef _MSC_VER
typedef unsigned __int8 uint8_t;
#else
#include <stdint.h>
#endif
 
class OutputBuffer {
public:
  void Put(const std::string line);
 
  bool Get(std::string& line);
 
private:
  std::deque<std::string> m_buffer;
  std::mutex m_mutex;
};
 
class LineBuffer {
public:
  void Put(uint8_t ch);
 
  bool HasLine() const;
 
  std::vector<uint8_t> GetLine();
 
  LineBuffer() : m_line_count(0), m_last_ch('\n') {}
 
private:
  std::vector<uint8_t> m_buff;
  int m_line_count;
  uint8_t m_last_ch;
};
 
class N0183Buffer {
public:
  void Put(uint8_t ch);
 
  bool HasSentence() const { return !m_lines.empty(); }
 
  std::string GetSentence();
 
  N0183Buffer() : m_state(State::PrefixWait) {}
 
private:
  std::deque<std::string> m_lines;
  std::vector<uint8_t> m_line;
  enum class State { PrefixWait, Data, CsDigit1, CsDigit2 } m_state;
};
 
#endif  // _COMM_BUFFERS_H__