Milena (Olena)
User documentation 2.0a Id
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00001 // Copyright (C) 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_HISTO_POINT_FROM_VALUE_HH 00027 # define MLN_HISTO_POINT_FROM_VALUE_HH 00028 00032 00033 # include <mln/core/grids.hh> 00034 # include <mln/core/point.hh> 00035 # include <mln/fun/v2i/index_of_value.hh> 00036 # include <mln/fun/v2v/component.hh> 00037 # include <mln/trait/value/comp.hh> 00038 00039 00040 # define mln_histo_point_type_from(T) typename mln::histo::point_type_from<T>::ret 00041 00042 00043 namespace mln 00044 { 00045 00046 namespace histo 00047 { 00048 00049 00050 template <typename T> 00051 struct point_type_from 00052 { 00053 private: 00054 enum { d = mln_dim(T) }; 00055 typedef mln_regular_grid_from_dim(d) G; 00056 00057 public: 00058 typedef mln::point<G, def::coord> ret; 00059 }; 00060 00061 00062 template <typename T> 00063 struct point_from_value : Function_v2v< point_from_value<T> > 00064 { 00065 typedef mln_histo_point_type_from(T) result; 00066 result operator()(const T& v) const; 00067 }; 00068 00069 template <typename T> 00070 mln_histo_point_type_from(T) 00071 meta_point_from_value(const T& v); 00072 00073 00074 # ifndef MLN_INCLUDE_ONLY 00075 00076 namespace internal 00077 { 00078 00079 template <unsigned d> 00080 struct point_from_value; 00081 00082 template <> 00083 struct point_from_value< 1 > 00084 { 00085 template <typename T, typename P> 00086 static void run(const T& v, P& p) 00087 { 00088 p[0] = fun::v2i::meta_index_of_value(v); 00089 } 00090 }; 00091 00092 template <> 00093 struct point_from_value< 2 > 00094 { 00095 template <typename T, typename P> 00096 static void run(const T& v, P& p) 00097 { 00098 p[0] = fun::v2i::meta_index_of_value( fun::v2v::component<T,0>()(v) ); 00099 p[1] = fun::v2i::meta_index_of_value( fun::v2v::component<T,1>()(v) ); 00100 } 00101 }; 00102 00103 template <> 00104 struct point_from_value< 3 > 00105 { 00106 template <typename T, typename P> 00107 static void run(const T& v, P& p) 00108 { 00109 p[0] = fun::v2i::meta_index_of_value( fun::v2v::component<T,0>()(v) ); 00110 p[1] = fun::v2i::meta_index_of_value( fun::v2v::component<T,1>()(v) ); 00111 p[2] = fun::v2i::meta_index_of_value( fun::v2v::component<T,2>()(v) ); 00112 } 00113 }; 00114 00115 } // end of namespace mln::histo::internal 00116 00117 00118 template <typename T> 00119 inline 00120 typename point_from_value<T>::result 00121 point_from_value<T>::operator()(const T& v) const 00122 { 00123 mln_histo_point_type_from(T) p; 00124 internal::point_from_value<mln_dim(T)>::run(v, p); 00125 return p; 00126 } 00127 00128 template <typename T> 00129 mln_histo_point_type_from(T) 00130 meta_point_from_value(const T& v) 00131 { 00132 point_from_value<T> f; 00133 return f(v); 00134 } 00135 00136 # endif // ! MLN_INCLUDE_ONLY 00137 00138 } // end of namespace mln::histo 00139 00140 } // end of namespace mln 00141 00142 00143 #endif // ! MLN_HISTO_POINT_FROM_VALUE_HH