/*
Copyright_License {

  XCSoar Glide Computer - http://www.xcsoar.org/
  Copyright (C) 2000-2015 The XCSoar Project
  A detailed list of copyright holders can be found in the file "AUTHORS".

  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
}
*/

#ifndef XCSOAR_BASE_BLACKBOARD_HPP
#define XCSOAR_BASE_BLACKBOARD_HPP

#include "NMEA/MoreData.hpp"
#include "NMEA/Derived.hpp"
#include "Compiler.h"

/**
 * Base class for blackboards, providing read access to NMEA_INFO and DERIVED_INFO
 */
class BaseBlackboard
{
protected:
  MoreData gps_info;
  DerivedInfo calculated_info;

public:
  // all blackboards can be read as const
  gcc_pure
  const MoreData &Basic() const {
    return gps_info;
  }

  gcc_pure
  const DerivedInfo& Calculated() const {
    return calculated_info;
  }
};

#endif
