/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2006 INRIA

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * 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

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#ifndef HIGH_PRECISION_DOUBLE_H

#define HIGH_PRECISION_DOUBLE_H

#include <stdint.h>

namespace ns3 {

/**

 * Obviously, this implementation of the HighPrecision class does

 * not provide the 128 bits accuracy since it uses a an IEEE754 double

 * to store the value. It also does not report overflows.

 * So, it is a nice shortcut but in no way a complete solution.

 */

class HighPrecision 

{

public:

  HighPrecision ();

  HighPrecision (int64_t value, bool dummy);

  HighPrecision (double value);

  int64_t GetInteger (void) const;

  double GetDouble (void) const;

  bool Add (HighPrecision const &o);

  bool Sub (HighPrecision const &o);

  bool Mul (HighPrecision const &o);

  bool Div (HighPrecision const &o);

  int Compare (HighPrecision const &o) const;

  static HighPrecision Zero (void);

private:

  static const double MAX_64;

  double m_value;

};

}; // namespace ns3

#endif /* HIGH_PRECISION_DOUBLE_H  */