OpenWalnut
1.4.0
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00001 //--------------------------------------------------------------------------- 00002 // 00003 // Project: OpenWalnut ( http://www.openwalnut.org ) 00004 // 00005 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS 00006 // For more information see http://www.openwalnut.org/copying 00007 // 00008 // This file is part of OpenWalnut. 00009 // 00010 // OpenWalnut is free software: you can redistribute it and/or modify 00011 // it under the terms of the GNU Lesser General Public License as published by 00012 // the Free Software Foundation, either version 3 of the License, or 00013 // (at your option) any later version. 00014 // 00015 // OpenWalnut is distributed in the hope that it will be useful, 00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00018 // GNU Lesser General Public License for more details. 00019 // 00020 // You should have received a copy of the GNU Lesser General Public License 00021 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>. 00022 // 00023 //--------------------------------------------------------------------------- 00024 00025 #ifndef WLIMITS_H 00026 #define WLIMITS_H 00027 00028 #include <stdint.h> // since <cstdint> is part of c++0x upcoming standard 00029 00030 #include <cstddef> 00031 00032 #include <boost/math/special_functions/fpclassify.hpp> // isnan, isinf 00033 00034 /** 00035 * Project wide limits for different quantities. 00036 */ 00037 namespace wlimits 00038 { 00039 extern const double MAX_DOUBLE; //!< Maximum double value 00040 00041 extern const float MAX_FLOAT; //!< Maximum float value 00042 00043 extern const size_t MAX_SIZE_T; //!< Maximum size value 00044 00045 extern const int32_t MAX_INT32_T; //!< Maximum int32_t value 00046 00047 extern const double MIN_DOUBLE; //!< Positive minimum double value 00048 00049 /** 00050 * Smallest double such: 1.0 + DBL_EPS == 1.0 is still true. 00051 */ 00052 extern const double DBL_EPS; 00053 00054 /** 00055 * Smallest float such: 1.0 + FLT_EPS == 1.0 is still true. 00056 */ 00057 extern const float FLT_EPS; 00058 00059 /** 00060 * Determines if a number is considered as NaN (aka Not a Number) or not. 00061 * 00062 * \note The reason for using here a wrapper to cmath's isnan is that it is only included in C99 which is not part of any existing C++ standard yet. 00063 * 00064 * \param value The value to be checked 00065 * 00066 * \return True if the value is a NaN, false otherwise. 00067 */ 00068 template< typename T > bool isNaN( T value ); 00069 00070 /** 00071 * Determines if a number is considered as infinity or not. 00072 * 00073 * \note The reason for using here a wrapper to cmath's isinf is that it is only included in C99 which is not part of any existing C++ standard yet. 00074 * 00075 * \param value The value to be checked 00076 * 00077 * \return True if the value is infinity, false otherwise. 00078 */ 00079 template< typename T > bool isInf( T value ); 00080 } 00081 00082 template< typename T > bool wlimits::isNaN( T value ) 00083 { 00084 return ( boost::math::isnan )( value ); 00085 } 00086 00087 template< typename T > bool wlimits::isInf( T value ) 00088 { 00089 return ( boost::math::isinf )( value ); 00090 } 00091 00092 #endif // WLIMITS_H