error.h

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/*
 * HEIF codec.
 * Copyright (c) 2017 struktur AG, Dirk Farin <farin@struktur.de>
 *
 * This file is part of libheif.
 *
 * libheif 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.
 *
 * libheif 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 libheif.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef LIBHEIF_ERROR_H
#define LIBHEIF_ERROR_H
 
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
 
#include <cinttypes>
#include <cstddef>
 
#include <vector>
#include <string>
#include <memory>
#include <limits>
#include <istream>
#include <ostream>
#include <sstream>
 
 
#include "heif.h"
 
 
 
static constexpr char kSuccess[] = "Success";
 
 
namespace heif {
 
  class ErrorBuffer
  {
  public:
    ErrorBuffer() { }
 
    void set_success() {
      m_error_message = c_success;
    }
 
    void set_error(std::string err) {
      m_buffer = err;
      m_error_message = m_buffer.c_str();
    }
 
    const char* get_error() const {
      return m_error_message;
    }
 
  private:
    constexpr static const char* c_success = "Success";
    std::string m_buffer;
    const char* m_error_message = c_success;
  };
 
 
  class Error
  {
  public:
    enum heif_error_code error_code;
    enum heif_suberror_code sub_error_code;
    std::string message;
 
    Error();
 
    Error(heif_error_code c,
          heif_suberror_code sc = heif_suberror_Unspecified,
          std::string msg="");
 
    static Error Ok;
 
    static const char kSuccess[];
 
    bool operator==(const Error& other) const { return error_code == other.error_code; }
    bool operator!=(const Error& other) const { return !(*this == other); }
 
    operator bool() const { return error_code != heif_error_Ok; }
 
    static const char* get_error_string(heif_error_code err);
    static const char* get_error_string(heif_suberror_code err);
 
    heif_error error_struct(ErrorBuffer* error_buffer) const;
  };
 
 
  inline std::ostream& operator<<(std::ostream& ostr, const Error& err) {
    ostr << err.error_code << "/" << err.sub_error_code;
    return ostr;
  }
}
 
#endif