int-type.hpp
Go to the documentation of this file.00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Christian Schulte <schulte@gecode.org> 00005 * 00006 * Copyright: 00007 * Christian Schulte, 2008 00008 * 00009 * This file is part of Gecode, the generic constraint 00010 * development environment: 00011 * http://www.gecode.org 00012 * 00013 * Permission is hereby granted, free of charge, to any person obtaining 00014 * a copy of this software and associated documentation files (the 00015 * "Software"), to deal in the Software without restriction, including 00016 * without limitation the rights to use, copy, modify, merge, publish, 00017 * distribute, sublicense, and/or sell copies of the Software, and to 00018 * permit persons to whom the Software is furnished to do so, subject to 00019 * the following conditions: 00020 * 00021 * The above copyright notice and this permission notice shall be 00022 * included in all copies or substantial portions of the Software. 00023 * 00024 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00025 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00026 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00027 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00028 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00029 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00030 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00031 * 00032 */ 00033 00034 #include <climits> 00035 00036 namespace Gecode { namespace Support { 00037 00039 enum IntType { 00040 IT_CHAR = 0, 00041 IT_SHRT = 1, 00042 IT_INT = 2 00043 }; 00044 00046 IntType u_type(unsigned int n); 00048 IntType s_type(signed int n); 00049 00051 template<class IntType> 00052 class IntTypeTraits {}; 00053 00055 template<> 00056 class IntTypeTraits<signed char> { 00057 public: 00059 typedef unsigned char utype; 00061 typedef signed char stype; 00063 static const signed char min = SCHAR_MIN; 00065 static const signed char max = SCHAR_MAX; 00067 static const IntType description = IT_CHAR; 00068 }; 00070 template<> 00071 class IntTypeTraits<unsigned char> { 00072 public: 00074 typedef unsigned char utype; 00076 typedef signed char stype; 00078 static const unsigned char min = 0; 00080 static const unsigned char max = UCHAR_MAX; 00082 static const IntType description = IT_CHAR; 00083 }; 00085 template<> 00086 class IntTypeTraits<signed short int> { 00087 public: 00089 typedef unsigned short int utype; 00091 typedef signed short int stype; 00093 static const signed short int min = SHRT_MIN; 00095 static const signed short int max = SHRT_MAX; 00097 static const IntType description = IT_SHRT; 00098 }; 00100 template<> 00101 class IntTypeTraits<unsigned short int> { 00102 public: 00104 typedef unsigned short int utype; 00106 typedef signed short int stype; 00108 static const unsigned short int min = 0; 00110 static const unsigned short int max = USHRT_MAX; 00112 static const IntType description = IT_SHRT; 00113 }; 00115 template<> 00116 class IntTypeTraits<signed int> { 00117 public: 00119 typedef unsigned int utype; 00121 typedef signed int stype; 00123 static const signed int min = INT_MIN; 00125 static const signed int max = INT_MAX; 00127 static const IntType description = IT_INT; 00128 }; 00130 template<> 00131 class IntTypeTraits<unsigned int> { 00132 public: 00134 typedef unsigned int utype; 00136 typedef signed int stype; 00138 static const unsigned int min = 0; 00140 static const unsigned int max = UINT_MAX; 00142 static const IntType description = IT_INT; 00143 }; 00144 00145 00146 forceinline IntType 00147 u_type(unsigned int n) { 00148 if (n < UCHAR_MAX) 00149 return IT_CHAR; 00150 else if (n < USHRT_MAX) 00151 return IT_SHRT; 00152 else 00153 return IT_INT; 00154 } 00155 00156 forceinline IntType 00157 s_type(int n) { 00158 if ((n > SCHAR_MIN) && (n < SCHAR_MAX)) 00159 return IT_CHAR; 00160 else if ((n > SHRT_MIN) && (n < SHRT_MAX)) 00161 return IT_SHRT; 00162 else 00163 return IT_INT; 00164 } 00165 00166 }} 00167 00168 // STATISTICS: support-any