Milena (Olena)
User documentation 2.0a Id
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00001 // Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE) 00002 // 00003 // This file is part of Olena. 00004 // 00005 // Olena is free software: you can redistribute it and/or modify it under 00006 // the terms of the GNU General Public License as published by the Free 00007 // Software Foundation, version 2 of the License. 00008 // 00009 // Olena 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 GNU 00012 // General Public License for more details. 00013 // 00014 // You should have received a copy of the GNU General Public License 00015 // along with Olena. If not, see <http://www.gnu.org/licenses/>. 00016 // 00017 // As a special exception, you may use this file as part of a free 00018 // software project without restriction. Specifically, if other files 00019 // instantiate templates or use macros or inline functions from this 00020 // file, or you compile this file and link it with other files to produce 00021 // an executable, this file does not by itself cause the resulting 00022 // executable to be covered by the GNU General Public License. This 00023 // exception does not however invalidate any other reasons why the 00024 // executable file might be covered by the GNU General Public License. 00025 00026 #ifndef MLN_FUN_V2V_LINEAR_HH 00027 # define MLN_FUN_V2V_LINEAR_HH 00028 00032 00033 # include <mln/core/concept/function.hh> 00034 # include <mln/convert/to.hh> 00035 00036 00037 namespace mln 00038 { 00039 00040 namespace fun 00041 { 00042 00043 namespace v2v 00044 { 00045 00054 template <typename V, typename T = V, typename R = T> 00055 struct linear : public Function_v2v< linear<V,T,R> > 00056 { 00057 typedef R result; 00058 00059 R operator()(const V& v) const; 00060 00061 template <typename U> 00062 R operator()(const U& u) const; 00063 00064 linear(T a, T b); 00065 T a, b; 00066 }; 00067 00068 00069 template <typename V, typename T = V, typename R = T> 00070 struct linear_sat : public Function_v2v< linear_sat<V,T,R> > 00071 { 00072 typedef R result; 00073 00074 R operator()(const V& v) const; 00075 00076 template <typename U> 00077 R operator()(const U& u) const; 00078 00079 linear_sat(T a, T b); 00080 T a, b; 00081 }; 00082 00083 00084 # ifndef MLN_INCLUDE_ONLY 00085 00086 00087 // linear. 00088 00089 template <typename V, typename T, typename R> 00090 inline 00091 linear<V,T,R>::linear(T a, T b) 00092 : a(a), 00093 b(b) 00094 { 00095 } 00096 00097 template <typename V, typename T, typename R> 00098 inline 00099 R 00100 linear<V,T,R>::operator()(const V& v) const 00101 { 00102 return mln::convert::to<R>(a * static_cast<T>(v) + b); 00103 } 00104 00105 template <typename V, typename T, typename R> 00106 template <typename U> 00107 inline 00108 R 00109 linear<V,T,R>::operator()(const U& u) const 00110 { 00111 return this->operator()(static_cast<V>(u)); 00112 } 00113 00114 00115 // linear_sat. 00116 00117 template <typename V, typename T, typename R> 00118 inline 00119 linear_sat<V,T,R>::linear_sat(T a, T b) 00120 : a(a), 00121 b(b) 00122 { 00123 } 00124 00125 template <typename V, typename T, typename R> 00126 inline 00127 R 00128 linear_sat<V,T,R>::operator()(const V& v) const 00129 { 00130 T res = a * static_cast<T>(v) + b; 00131 if (res > mln_max(R)) 00132 res = mln_max(R); 00133 else if (res < mln_min(R)) 00134 res = mln_min(R); 00135 return mln::convert::to<R>(res); 00136 } 00137 00138 template <typename V, typename T, typename R> 00139 template <typename U> 00140 inline 00141 R 00142 linear_sat<V,T,R>::operator()(const U& u) const 00143 { 00144 mlc_converts_to(U, V)::check(); 00145 return this->operator()(static_cast<V>(u)); 00146 } 00147 00148 00149 # endif // ! MLN_INCLUDE_ONLY 00150 00151 } // end of namespace mln::fun::v2v 00152 00153 } // end of namespace mln::fun 00154 00155 } // end of namespace mln 00156 00157 00158 #endif // ! MLN_FUN_V2V_LINEAR_HH