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_CORE_BOX_RUNEND_PITER_HH 00027 # define MLN_CORE_BOX_RUNEND_PITER_HH 00028 00032 00033 # include <mln/core/internal/site_iterator_base.hh> 00034 # include <mln/core/site_set/box.hh> 00035 00036 00037 #define mln_box_runend_piter(I) typename mln::box_runend_piter<mln_psite(I)> 00038 #define mln_box_runend_piter_(I) mln::box_runend_piter<mln_psite_(I)> 00039 00040 00041 namespace mln 00042 { 00043 00048 template <typename P> 00049 class box_runend_piter : 00050 public internal::site_set_iterator_base< box<P>, 00051 box_runend_piter<P> > 00052 { 00053 typedef box_runend_piter<P> self_; 00054 typedef internal::site_set_iterator_base< box<P>, self_ > super_; 00055 public: 00056 00057 // Make definitions from super class available. 00058 enum { dim = super_::dim }; 00059 00064 box_runend_piter(const box<P>& b); 00065 00067 void init_(const box<P>& b); 00068 00069 box_runend_piter(); 00070 00072 bool is_valid_() const; 00073 00075 void invalidate_(); 00076 00078 void start_(); 00079 00081 void next_(); 00082 00084 unsigned run_length() const; 00085 00086 private: 00087 using super_::p_; 00088 using super_::s_; 00089 }; 00090 00091 00092 # ifndef MLN_INCLUDE_ONLY 00093 00094 00095 // box_runend_piter<P> 00096 00097 template <typename P> 00098 inline 00099 box_runend_piter<P>::box_runend_piter() 00100 { 00101 } 00102 00103 template <typename P> 00104 inline 00105 box_runend_piter<P>::box_runend_piter(const box<P>& b) 00106 { 00107 init_(b); 00108 } 00109 00110 template <typename P> 00111 inline 00112 void 00113 box_runend_piter<P>::init_(const box<P>& b) 00114 { 00115 this->change_target(b); 00116 } 00117 00118 00119 template <typename P> 00120 inline 00121 bool 00122 box_runend_piter<P>::is_valid_() const 00123 { 00124 return p_[0] != static_cast<mln_coord(P)>(s_->pmin()[0] - 1); 00125 } 00126 00127 template <typename P> 00128 inline 00129 void 00130 box_runend_piter<P>::invalidate_() 00131 { 00132 p_[0] = static_cast<mln_coord(P)>(s_->pmin()[0] - 1); 00133 } 00134 00135 template <typename P> 00136 inline 00137 void 00138 box_runend_piter<P>::start_() 00139 { 00140 p_ = s_->pmax(); 00141 } 00142 00143 template <typename P> 00144 inline 00145 void 00146 box_runend_piter<P>::next_() 00147 { 00148 // Do we want this run for image in 3d? 00149 for (int c = dim - 2; c >= 0; --c) 00150 { 00151 if (p_[c] != s_->pmin()[c]) 00152 { 00153 --p_[c]; 00154 break; 00155 } 00156 else 00157 p_[c] = s_->pmax()[c]; 00158 } 00159 00160 if (p_ == s_->pmax()) 00161 invalidate_(); 00162 } 00163 00164 template <typename P> 00165 inline 00166 unsigned 00167 box_runend_piter<P>::run_length() const 00168 { 00169 return s_->len(dim - 1); 00170 } 00171 00172 00173 # endif // ! MLN_INCLUDE_ONLY 00174 00175 } // end of namespace mln 00176 00177 00178 #endif // ! MLN_CORE_BOX_RUNEND_PITER_HH