readerContext.hpp

/*
  ANCH Framework: ANother C++ Hack is a C++ framework based on C++11 standard
  Copyright (C) 2020 Vincent Lachenal
 
  This file is part of ANCH Framework.
 
  ANCH Framework is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
 
  ANCH Framework 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 Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public License
  along with ANCH Framework.  If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
 
#include <istream>
#include <string>
#include <optional>
#include <utility>
#include <functional>
#include <stdint.h>
 
#include "json/mappingOptions.hpp"
 
namespace anch::json {

  class ReaderContext {
 
    // Attributes +
  public:
    std::istream& input;

    anch::json::MappingOptions options;

    std::string pbuf;

    uint32_t offset;

    std::size_t bufferSize;

    char* buffer;

    std::size_t read;
 
  private:
    std::function<char()> _discardFunc;

    std::function<void()> _unknownFunc;

    std::function<void(std::streamsize read)> _checkSize;
    // Attributes -
 
    // Constructors +
  public:
    ReaderContext() = delete;

    ReaderContext(const ReaderContext& context) = delete;

    ReaderContext(ReaderContext&& context) = delete;

    ReaderContext(std::istream& is, const anch::json::MappingOptions& options) noexcept;
    // Constructors -
 
    // Destructor +
  public:
    virtual ~ReaderContext() noexcept;
    // Destructor -
 
    // Methods +
  public:
    char discard();

    void parseUnknown();

    bool next(char& current);

    void back();
 
  protected:
    virtual std::streamsize refillBuffer();
    // Methods -
 
  };
 
}
 
#include "json/impl/readerContext.hpp"