Milena (Olena)
User documentation 2.0a Id
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00001 // Copyright (C) 2009, 2010, 2011 EPITA Research and Development 00002 // Laboratory (LRDE) 00003 // 00004 // This file is part of Olena. 00005 // 00006 // Olena is free software: you can redistribute it and/or modify it under 00007 // the terms of the GNU General Public License as published by the Free 00008 // Software Foundation, version 2 of the License. 00009 // 00010 // Olena is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 // General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU General Public License 00016 // along with Olena. If not, see <http://www.gnu.org/licenses/>. 00017 // 00018 // As a special exception, you may use this file as part of a free 00019 // software project without restriction. Specifically, if other files 00020 // instantiate templates or use macros or inline functions from this 00021 // file, or you compile this file and link it with other files to produce 00022 // an executable, this file does not by itself cause the resulting 00023 // executable to be covered by the GNU General Public License. This 00024 // exception does not however invalidate any other reasons why the 00025 // executable file might be covered by the GNU General Public License. 00026 00027 #ifndef MLN_CONVERT_IMPL_FROM_DOUBLE_TO_VALUE_HH 00028 # define MLN_CONVERT_IMPL_FROM_DOUBLE_TO_VALUE_HH 00029 00035 00036 # include <utility> 00037 # include <mln/value/concept/integer.hh> 00038 # include <mln/value/concept/floating.hh> 00039 # include <mln/core/concept/value.hh> 00040 # include <mln/math/round.hh> 00041 00042 00043 00044 00045 namespace mln 00046 { 00047 00048 namespace convert 00049 { 00050 00052 template <typename V> 00053 void 00054 from_to(const double& from, Value<V>& to); 00055 00056 00057 # ifndef MLN_INCLUDE_ONLY 00058 00059 namespace impl 00060 { 00061 00062 // Case 1: 00063 00064 template <typename V> 00065 inline 00066 void 00067 from_double_to_value(const double& from, 00068 mln::value::Integer<V>& to) 00069 { 00070 exact(to) = math::round<V>()(from); 00071 } 00072 00073 // Case 2: 00074 00075 template <typename V> 00076 inline 00077 void 00078 from_double_to_value(const double& from, 00079 mln::value::Floating<V>& to) 00080 { 00081 exact(to) = from; 00082 } 00083 00084 00085 // Default: no conversion defined. 00086 00087 template <typename V> 00088 inline 00089 void 00090 from_double_to_value(const double& from, 00091 Value<V>& to) 00092 { 00093 (void) from; 00094 (void) to; 00095 mlc_abort(V)::check(); 00096 } 00097 00098 } // end of namespace mln::convert::impl 00099 00100 00101 namespace internal 00102 { 00103 00104 template <typename V> 00105 inline 00106 void 00107 from_double_to_value_dispatch(const double& from, Value<V>& to) 00108 { 00109 impl::from_double_to_value(from, exact(to)); 00110 } 00111 00112 } // end of namespace mln::convert::internal 00113 00114 00115 namespace over_load 00116 { 00117 00118 // Facades. 00119 00120 00121 // double-> Value 00122 template <typename V> 00123 inline 00124 void 00125 from_to_(const double& from, Value<V>& to) 00126 { 00127 internal::from_double_to_value_dispatch(from, to); 00128 } 00129 00130 // double-> unsigned 00131 inline 00132 void 00133 from_to_(const double& from, 00134 unsigned& to) 00135 { 00136 mln_precondition(from >= 0); 00137 to = math::round<unsigned>()(from); 00138 } 00139 00140 // double-> int 00141 inline 00142 void 00143 from_to_(const double& from, 00144 int& to) 00145 { 00146 to = math::round<int>()(from); 00147 } 00148 00149 } // end of namespace mln::convert::over_load 00150 00151 # endif // ! MLN_INCLUDE_ONLY 00152 00153 } // end of namespace mln::convert 00154 00155 } // end of namespace mln 00156 00157 00158 #endif // ! MLN_CONVERT_IMPL_FROM_DOUBLE_TO_VALUE_HH