00001 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ 00002 /* 00003 * Copyright (c) 2006 INRIA 00004 * 00005 * This program is free software; you can redistribute it and/or modify 00006 * it under the terms of the GNU General Public License version 2 as 00007 * published by the Free Software Foundation; 00008 * 00009 * This program is distributed in the hope that it will be useful, 00010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 * GNU General Public License for more details. 00013 * 00014 * You should have received a copy of the GNU General Public License 00015 * along with this program; if not, write to the Free Software 00016 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00017 * 00018 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr> 00019 */ 00020 #ifndef HIGH_PRECISION_DOUBLE_H 00021 #define HIGH_PRECISION_DOUBLE_H 00022 00023 #include <stdint.h> 00024 00025 namespace ns3 { 00026 00027 /** 00028 * Obviously, this implementation of the HighPrecision class does 00029 * not provide the 128 bits accuracy since it uses a an IEEE754 double 00030 * to store the value. It also does not report overflows. 00031 * So, it is a nice shortcut but in no way a complete solution. 00032 */ 00033 00034 class HighPrecision 00035 { 00036 public: 00037 HighPrecision (); 00038 HighPrecision (int64_t value, bool dummy); 00039 HighPrecision (double value); 00040 00041 int64_t GetInteger (void) const; 00042 double GetDouble (void) const; 00043 bool Add (HighPrecision const &o); 00044 bool Sub (HighPrecision const &o); 00045 bool Mul (HighPrecision const &o); 00046 bool Div (HighPrecision const &o); 00047 00048 int Compare (HighPrecision const &o) const; 00049 static HighPrecision Zero (void); 00050 private: 00051 static const double MAX_64; 00052 double m_value; 00053 }; 00054 00055 }; // namespace ns3 00056 00057 #endif /* HIGH_PRECISION_DOUBLE_H */