1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2006 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #ifndef LEMON_GRAPH_UTILS_H |
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20 | #define LEMON_GRAPH_UTILS_H |
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21 | |
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22 | #include <iterator> |
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23 | #include <vector> |
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24 | #include <map> |
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25 | #include <cmath> |
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26 | #include <algorithm> |
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27 | |
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28 | #include <lemon/bits/invalid.h> |
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29 | #include <lemon/bits/utility.h> |
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30 | #include <lemon/maps.h> |
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31 | #include <lemon/bits/traits.h> |
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32 | |
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33 | #include <lemon/bits/alteration_notifier.h> |
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34 | #include <lemon/bits/default_map.h> |
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35 | |
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36 | ///\ingroup gutils |
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37 | ///\file |
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38 | ///\brief Graph utilities. |
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39 | /// |
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40 | /// |
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41 | |
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42 | |
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43 | namespace lemon { |
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44 | |
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45 | /// \addtogroup gutils |
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46 | /// @{ |
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47 | |
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48 | ///Creates convenience typedefs for the graph types and iterators |
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49 | |
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50 | ///This \c \#define creates convenience typedefs for the following types |
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51 | ///of \c Graph: \c Node, \c NodeIt, \c Edge, \c EdgeIt, \c InEdgeIt, |
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52 | ///\c OutEdgeIt |
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53 | ///\note If \c G it a template parameter, it should be used in this way. |
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54 | ///\code |
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55 | /// GRAPH_TYPEDEFS(typename G) |
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56 | ///\endcode |
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57 | /// |
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58 | ///\warning There are no typedefs for the graph maps because of the lack of |
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59 | ///template typedefs in C++. |
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60 | #define GRAPH_TYPEDEFS(Graph) \ |
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61 | typedef Graph:: Node Node; \ |
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62 | typedef Graph:: NodeIt NodeIt; \ |
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63 | typedef Graph:: Edge Edge; \ |
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64 | typedef Graph:: EdgeIt EdgeIt; \ |
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65 | typedef Graph:: InEdgeIt InEdgeIt; \ |
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66 | typedef Graph::OutEdgeIt OutEdgeIt; |
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67 | |
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68 | ///Creates convenience typedefs for the undirected graph types and iterators |
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69 | |
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70 | ///This \c \#define creates the same convenience typedefs as defined by |
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71 | ///\ref GRAPH_TYPEDEFS(Graph) and three more, namely it creates |
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72 | ///\c UEdge, \c UEdgeIt, \c IncEdgeIt, |
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73 | /// |
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74 | ///\note If \c G it a template parameter, it should be used in this way. |
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75 | ///\code |
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76 | /// UGRAPH_TYPEDEFS(typename G) |
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77 | ///\endcode |
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78 | /// |
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79 | ///\warning There are no typedefs for the graph maps because of the lack of |
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80 | ///template typedefs in C++. |
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81 | #define UGRAPH_TYPEDEFS(Graph) \ |
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82 | GRAPH_TYPEDEFS(Graph) \ |
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83 | typedef Graph:: UEdge UEdge; \ |
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84 | typedef Graph:: UEdgeIt UEdgeIt; \ |
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85 | typedef Graph:: IncEdgeIt IncEdgeIt; |
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86 | |
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87 | ///\brief Creates convenience typedefs for the bipartite undirected graph |
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88 | ///types and iterators |
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89 | |
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90 | ///This \c \#define creates the same convenience typedefs as defined by |
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91 | ///\ref UGRAPH_TYPEDEFS(Graph) and two more, namely it creates |
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92 | ///\c ANodeIt, \c BNodeIt, |
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93 | /// |
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94 | ///\note If \c G it a template parameter, it should be used in this way. |
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95 | ///\code |
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96 | /// BPUGRAPH_TYPEDEFS(typename G) |
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97 | ///\endcode |
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98 | /// |
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99 | ///\warning There are no typedefs for the graph maps because of the lack of |
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100 | ///template typedefs in C++. |
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101 | #define BPUGRAPH_TYPEDEFS(Graph) \ |
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102 | UGRAPH_TYPEDEFS(Graph) \ |
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103 | typedef Graph::ANode ANode; \ |
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104 | typedef Graph::BNode BNode; \ |
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105 | typedef Graph::ANodeIt ANodeIt; \ |
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106 | typedef Graph::BNodeIt BNodeIt; |
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107 | |
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108 | /// \brief Function to count the items in the graph. |
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109 | /// |
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110 | /// This function counts the items (nodes, edges etc) in the graph. |
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111 | /// The complexity of the function is O(n) because |
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112 | /// it iterates on all of the items. |
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113 | |
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114 | template <typename Graph, typename Item> |
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115 | inline int countItems(const Graph& g) { |
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116 | typedef typename ItemSetTraits<Graph, Item>::ItemIt ItemIt; |
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117 | int num = 0; |
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118 | for (ItemIt it(g); it != INVALID; ++it) { |
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119 | ++num; |
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120 | } |
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121 | return num; |
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122 | } |
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123 | |
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124 | // Node counting: |
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125 | |
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126 | namespace _graph_utils_bits { |
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127 | |
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128 | template <typename Graph, typename Enable = void> |
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129 | struct CountNodesSelector { |
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130 | static int count(const Graph &g) { |
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131 | return countItems<Graph, typename Graph::Node>(g); |
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132 | } |
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133 | }; |
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134 | |
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135 | template <typename Graph> |
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136 | struct CountNodesSelector< |
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137 | Graph, typename |
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138 | enable_if<typename Graph::NodeNumTag, void>::type> |
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139 | { |
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140 | static int count(const Graph &g) { |
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141 | return g.nodeNum(); |
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142 | } |
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143 | }; |
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144 | } |
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145 | |
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146 | /// \brief Function to count the nodes in the graph. |
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147 | /// |
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148 | /// This function counts the nodes in the graph. |
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149 | /// The complexity of the function is O(n) but for some |
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150 | /// graph structures it is specialized to run in O(1). |
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151 | /// |
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152 | /// \todo refer how to specialize it |
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153 | |
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154 | template <typename Graph> |
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155 | inline int countNodes(const Graph& g) { |
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156 | return _graph_utils_bits::CountNodesSelector<Graph>::count(g); |
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157 | } |
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158 | |
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159 | namespace _graph_utils_bits { |
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160 | |
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161 | template <typename Graph, typename Enable = void> |
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162 | struct CountANodesSelector { |
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163 | static int count(const Graph &g) { |
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164 | return countItems<Graph, typename Graph::ANode>(g); |
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165 | } |
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166 | }; |
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167 | |
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168 | template <typename Graph> |
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169 | struct CountANodesSelector< |
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170 | Graph, typename |
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171 | enable_if<typename Graph::NodeNumTag, void>::type> |
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172 | { |
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173 | static int count(const Graph &g) { |
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174 | return g.aNodeNum(); |
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175 | } |
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176 | }; |
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177 | } |
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178 | |
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179 | /// \brief Function to count the anodes in the graph. |
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180 | /// |
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181 | /// This function counts the anodes in the graph. |
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182 | /// The complexity of the function is O(an) but for some |
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183 | /// graph structures it is specialized to run in O(1). |
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184 | /// |
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185 | /// \todo refer how to specialize it |
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186 | |
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187 | template <typename Graph> |
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188 | inline int countANodes(const Graph& g) { |
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189 | return _graph_utils_bits::CountANodesSelector<Graph>::count(g); |
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190 | } |
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191 | |
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192 | namespace _graph_utils_bits { |
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193 | |
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194 | template <typename Graph, typename Enable = void> |
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195 | struct CountBNodesSelector { |
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196 | static int count(const Graph &g) { |
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197 | return countItems<Graph, typename Graph::BNode>(g); |
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198 | } |
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199 | }; |
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200 | |
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201 | template <typename Graph> |
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202 | struct CountBNodesSelector< |
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203 | Graph, typename |
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204 | enable_if<typename Graph::NodeNumTag, void>::type> |
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205 | { |
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206 | static int count(const Graph &g) { |
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207 | return g.bNodeNum(); |
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208 | } |
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209 | }; |
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210 | } |
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211 | |
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212 | /// \brief Function to count the bnodes in the graph. |
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213 | /// |
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214 | /// This function counts the bnodes in the graph. |
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215 | /// The complexity of the function is O(bn) but for some |
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216 | /// graph structures it is specialized to run in O(1). |
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217 | /// |
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218 | /// \todo refer how to specialize it |
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219 | |
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220 | template <typename Graph> |
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221 | inline int countBNodes(const Graph& g) { |
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222 | return _graph_utils_bits::CountBNodesSelector<Graph>::count(g); |
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223 | } |
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224 | |
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225 | |
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226 | // Edge counting: |
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227 | |
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228 | namespace _graph_utils_bits { |
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229 | |
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230 | template <typename Graph, typename Enable = void> |
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231 | struct CountEdgesSelector { |
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232 | static int count(const Graph &g) { |
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233 | return countItems<Graph, typename Graph::Edge>(g); |
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234 | } |
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235 | }; |
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236 | |
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237 | template <typename Graph> |
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238 | struct CountEdgesSelector< |
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239 | Graph, |
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240 | typename enable_if<typename Graph::EdgeNumTag, void>::type> |
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241 | { |
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242 | static int count(const Graph &g) { |
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243 | return g.edgeNum(); |
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244 | } |
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245 | }; |
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246 | } |
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247 | |
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248 | /// \brief Function to count the edges in the graph. |
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249 | /// |
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250 | /// This function counts the edges in the graph. |
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251 | /// The complexity of the function is O(e) but for some |
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252 | /// graph structures it is specialized to run in O(1). |
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253 | |
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254 | template <typename Graph> |
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255 | inline int countEdges(const Graph& g) { |
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256 | return _graph_utils_bits::CountEdgesSelector<Graph>::count(g); |
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257 | } |
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258 | |
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259 | // Undirected edge counting: |
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260 | namespace _graph_utils_bits { |
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261 | |
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262 | template <typename Graph, typename Enable = void> |
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263 | struct CountUEdgesSelector { |
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264 | static int count(const Graph &g) { |
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265 | return countItems<Graph, typename Graph::UEdge>(g); |
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266 | } |
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267 | }; |
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268 | |
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269 | template <typename Graph> |
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270 | struct CountUEdgesSelector< |
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271 | Graph, |
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272 | typename enable_if<typename Graph::EdgeNumTag, void>::type> |
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273 | { |
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274 | static int count(const Graph &g) { |
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275 | return g.uEdgeNum(); |
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276 | } |
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277 | }; |
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278 | } |
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279 | |
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280 | /// \brief Function to count the undirected edges in the graph. |
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281 | /// |
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282 | /// This function counts the undirected edges in the graph. |
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283 | /// The complexity of the function is O(e) but for some |
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284 | /// graph structures it is specialized to run in O(1). |
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285 | |
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286 | template <typename Graph> |
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287 | inline int countUEdges(const Graph& g) { |
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288 | return _graph_utils_bits::CountUEdgesSelector<Graph>::count(g); |
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289 | |
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290 | } |
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291 | |
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292 | |
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293 | template <typename Graph, typename DegIt> |
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294 | inline int countNodeDegree(const Graph& _g, const typename Graph::Node& _n) { |
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295 | int num = 0; |
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296 | for (DegIt it(_g, _n); it != INVALID; ++it) { |
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297 | ++num; |
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298 | } |
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299 | return num; |
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300 | } |
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301 | |
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302 | /// \brief Function to count the number of the out-edges from node \c n. |
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303 | /// |
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304 | /// This function counts the number of the out-edges from node \c n |
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305 | /// in the graph. |
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306 | template <typename Graph> |
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307 | inline int countOutEdges(const Graph& _g, const typename Graph::Node& _n) { |
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308 | return countNodeDegree<Graph, typename Graph::OutEdgeIt>(_g, _n); |
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309 | } |
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310 | |
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311 | /// \brief Function to count the number of the in-edges to node \c n. |
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312 | /// |
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313 | /// This function counts the number of the in-edges to node \c n |
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314 | /// in the graph. |
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315 | template <typename Graph> |
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316 | inline int countInEdges(const Graph& _g, const typename Graph::Node& _n) { |
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317 | return countNodeDegree<Graph, typename Graph::InEdgeIt>(_g, _n); |
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318 | } |
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319 | |
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320 | /// \brief Function to count the number of the inc-edges to node \c n. |
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321 | /// |
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322 | /// This function counts the number of the inc-edges to node \c n |
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323 | /// in the graph. |
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324 | template <typename Graph> |
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325 | inline int countIncEdges(const Graph& _g, const typename Graph::Node& _n) { |
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326 | return countNodeDegree<Graph, typename Graph::IncEdgeIt>(_g, _n); |
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327 | } |
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328 | |
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329 | namespace _graph_utils_bits { |
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330 | |
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331 | template <typename Graph, typename Enable = void> |
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332 | struct FindEdgeSelector { |
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333 | typedef typename Graph::Node Node; |
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334 | typedef typename Graph::Edge Edge; |
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335 | static Edge find(const Graph &g, Node u, Node v, Edge e) { |
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336 | if (e == INVALID) { |
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337 | g.firstOut(e, u); |
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338 | } else { |
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339 | g.nextOut(e); |
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340 | } |
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341 | while (e != INVALID && g.target(e) != v) { |
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342 | g.nextOut(e); |
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343 | } |
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344 | return e; |
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345 | } |
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346 | }; |
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347 | |
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348 | template <typename Graph> |
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349 | struct FindEdgeSelector< |
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350 | Graph, |
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351 | typename enable_if<typename Graph::FindEdgeTag, void>::type> |
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352 | { |
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353 | typedef typename Graph::Node Node; |
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354 | typedef typename Graph::Edge Edge; |
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355 | static Edge find(const Graph &g, Node u, Node v, Edge prev) { |
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356 | return g.findEdge(u, v, prev); |
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357 | } |
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358 | }; |
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359 | } |
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360 | |
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361 | /// \brief Finds an edge between two nodes of a graph. |
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362 | /// |
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363 | /// Finds an edge from node \c u to node \c v in graph \c g. |
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364 | /// |
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365 | /// If \c prev is \ref INVALID (this is the default value), then |
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366 | /// it finds the first edge from \c u to \c v. Otherwise it looks for |
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367 | /// the next edge from \c u to \c v after \c prev. |
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368 | /// \return The found edge or \ref INVALID if there is no such an edge. |
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369 | /// |
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370 | /// Thus you can iterate through each edge from \c u to \c v as it follows. |
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371 | ///\code |
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372 | /// for(Edge e=findEdge(g,u,v);e!=INVALID;e=findEdge(g,u,v,e)) { |
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373 | /// ... |
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374 | /// } |
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375 | ///\endcode |
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376 | /// |
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377 | ///\sa EdgeLookUp |
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378 | ///\se AllEdgeLookup |
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379 | ///\sa ConEdgeIt |
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380 | template <typename Graph> |
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381 | inline typename Graph::Edge |
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382 | findEdge(const Graph &g, typename Graph::Node u, typename Graph::Node v, |
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383 | typename Graph::Edge prev = INVALID) { |
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384 | return _graph_utils_bits::FindEdgeSelector<Graph>::find(g, u, v, prev); |
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385 | } |
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386 | |
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387 | /// \brief Iterator for iterating on edges connected the same nodes. |
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388 | /// |
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389 | /// Iterator for iterating on edges connected the same nodes. It is |
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390 | /// higher level interface for the findEdge() function. You can |
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391 | /// use it the following way: |
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392 | ///\code |
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393 | /// for (ConEdgeIt<Graph> it(g, src, trg); it != INVALID; ++it) { |
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394 | /// ... |
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395 | /// } |
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396 | ///\endcode |
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397 | /// |
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398 | ///\sa findEdge() |
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399 | ///\sa EdgeLookUp |
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400 | ///\se AllEdgeLookup |
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401 | /// |
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402 | /// \author Balazs Dezso |
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403 | template <typename _Graph> |
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404 | class ConEdgeIt : public _Graph::Edge { |
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405 | public: |
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406 | |
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407 | typedef _Graph Graph; |
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408 | typedef typename Graph::Edge Parent; |
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409 | |
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410 | typedef typename Graph::Edge Edge; |
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411 | typedef typename Graph::Node Node; |
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412 | |
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413 | /// \brief Constructor. |
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414 | /// |
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415 | /// Construct a new ConEdgeIt iterating on the edges which |
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416 | /// connects the \c u and \c v node. |
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417 | ConEdgeIt(const Graph& g, Node u, Node v) : graph(g) { |
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418 | Parent::operator=(findEdge(graph, u, v)); |
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419 | } |
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420 | |
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421 | /// \brief Constructor. |
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422 | /// |
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423 | /// Construct a new ConEdgeIt which continues the iterating from |
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424 | /// the \c e edge. |
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425 | ConEdgeIt(const Graph& g, Edge e) : Parent(e), graph(g) {} |
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426 | |
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427 | /// \brief Increment operator. |
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428 | /// |
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429 | /// It increments the iterator and gives back the next edge. |
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430 | ConEdgeIt& operator++() { |
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431 | Parent::operator=(findEdge(graph, graph.source(*this), |
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432 | graph.target(*this), *this)); |
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433 | return *this; |
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434 | } |
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435 | private: |
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436 | const Graph& graph; |
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437 | }; |
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438 | |
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439 | namespace _graph_utils_bits { |
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440 | |
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441 | template <typename Graph, typename Enable = void> |
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442 | struct FindUEdgeSelector { |
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443 | typedef typename Graph::Node Node; |
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444 | typedef typename Graph::UEdge UEdge; |
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445 | static UEdge find(const Graph &g, Node u, Node v, UEdge e) { |
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446 | bool b; |
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447 | if (u != v) { |
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448 | if (e == INVALID) { |
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449 | g.firstInc(e, b, u); |
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450 | } else { |
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451 | b = g.source(e) == u; |
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452 | g.nextInc(e, b); |
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453 | } |
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454 | while (e != INVALID && (b ? g.target(e) : g.source(e)) != v) { |
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455 | g.nextInc(e, b); |
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456 | } |
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457 | } else { |
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458 | if (e == INVALID) { |
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459 | g.firstInc(e, b, u); |
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460 | } else { |
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461 | b = true; |
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462 | g.nextInc(e, b); |
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463 | } |
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464 | while (e != INVALID && (!b || g.target(e) != v)) { |
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465 | g.nextInc(e, b); |
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466 | } |
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467 | } |
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468 | return e; |
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469 | } |
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470 | }; |
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471 | |
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472 | template <typename Graph> |
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473 | struct FindUEdgeSelector< |
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474 | Graph, |
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475 | typename enable_if<typename Graph::FindEdgeTag, void>::type> |
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476 | { |
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477 | typedef typename Graph::Node Node; |
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478 | typedef typename Graph::UEdge UEdge; |
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479 | static UEdge find(const Graph &g, Node u, Node v, UEdge prev) { |
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480 | return g.findUEdge(u, v, prev); |
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481 | } |
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482 | }; |
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483 | } |
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484 | |
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485 | /// \brief Finds an uedge between two nodes of a graph. |
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486 | /// |
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487 | /// Finds an uedge from node \c u to node \c v in graph \c g. |
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488 | /// If the node \c u and node \c v is equal then each loop edge |
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489 | /// will be enumerated. |
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490 | /// |
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491 | /// If \c prev is \ref INVALID (this is the default value), then |
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492 | /// it finds the first edge from \c u to \c v. Otherwise it looks for |
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493 | /// the next edge from \c u to \c v after \c prev. |
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494 | /// \return The found edge or \ref INVALID if there is no such an edge. |
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495 | /// |
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496 | /// Thus you can iterate through each edge from \c u to \c v as it follows. |
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497 | ///\code |
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498 | /// for(UEdge e = findUEdge(g,u,v); e != INVALID; |
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499 | /// e = findUEdge(g,u,v,e)) { |
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500 | /// ... |
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501 | /// } |
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502 | ///\endcode |
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503 | /// |
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504 | ///\sa ConEdgeIt |
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505 | |
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506 | template <typename Graph> |
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507 | inline typename Graph::UEdge |
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508 | findUEdge(const Graph &g, typename Graph::Node u, typename Graph::Node v, |
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509 | typename Graph::UEdge p = INVALID) { |
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510 | return _graph_utils_bits::FindUEdgeSelector<Graph>::find(g, u, v, p); |
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511 | } |
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512 | |
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513 | /// \brief Iterator for iterating on uedges connected the same nodes. |
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514 | /// |
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515 | /// Iterator for iterating on uedges connected the same nodes. It is |
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516 | /// higher level interface for the findUEdge() function. You can |
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517 | /// use it the following way: |
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518 | ///\code |
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519 | /// for (ConUEdgeIt<Graph> it(g, src, trg); it != INVALID; ++it) { |
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520 | /// ... |
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521 | /// } |
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522 | ///\endcode |
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523 | /// |
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524 | ///\sa findUEdge() |
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525 | /// |
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526 | /// \author Balazs Dezso |
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527 | template <typename _Graph> |
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528 | class ConUEdgeIt : public _Graph::UEdge { |
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529 | public: |
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530 | |
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531 | typedef _Graph Graph; |
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532 | typedef typename Graph::UEdge Parent; |
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533 | |
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534 | typedef typename Graph::UEdge UEdge; |
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535 | typedef typename Graph::Node Node; |
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536 | |
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537 | /// \brief Constructor. |
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538 | /// |
---|
539 | /// Construct a new ConUEdgeIt iterating on the edges which |
---|
540 | /// connects the \c u and \c v node. |
---|
541 | ConUEdgeIt(const Graph& g, Node u, Node v) : graph(g) { |
---|
542 | Parent::operator=(findUEdge(graph, u, v)); |
---|
543 | } |
---|
544 | |
---|
545 | /// \brief Constructor. |
---|
546 | /// |
---|
547 | /// Construct a new ConUEdgeIt which continues the iterating from |
---|
548 | /// the \c e edge. |
---|
549 | ConUEdgeIt(const Graph& g, UEdge e) : Parent(e), graph(g) {} |
---|
550 | |
---|
551 | /// \brief Increment operator. |
---|
552 | /// |
---|
553 | /// It increments the iterator and gives back the next edge. |
---|
554 | ConUEdgeIt& operator++() { |
---|
555 | Parent::operator=(findUEdge(graph, graph.source(*this), |
---|
556 | graph.target(*this), *this)); |
---|
557 | return *this; |
---|
558 | } |
---|
559 | private: |
---|
560 | const Graph& graph; |
---|
561 | }; |
---|
562 | |
---|
563 | /// \brief Copy a map. |
---|
564 | /// |
---|
565 | /// This function copies the \c source map to the \c target map. It uses the |
---|
566 | /// given iterator to iterate on the data structure and it uses the \c ref |
---|
567 | /// mapping to convert the source's keys to the target's keys. |
---|
568 | template <typename Target, typename Source, |
---|
569 | typename ItemIt, typename Ref> |
---|
570 | void copyMap(Target& target, const Source& source, |
---|
571 | ItemIt it, const Ref& ref) { |
---|
572 | for (; it != INVALID; ++it) { |
---|
573 | target[ref[it]] = source[it]; |
---|
574 | } |
---|
575 | } |
---|
576 | |
---|
577 | /// \brief Copy the source map to the target map. |
---|
578 | /// |
---|
579 | /// Copy the \c source map to the \c target map. It uses the given iterator |
---|
580 | /// to iterate on the data structure. |
---|
581 | template <typename Target, typename Source, typename ItemIt> |
---|
582 | void copyMap(Target& target, const Source& source, ItemIt it) { |
---|
583 | for (; it != INVALID; ++it) { |
---|
584 | target[it] = source[it]; |
---|
585 | } |
---|
586 | } |
---|
587 | |
---|
588 | namespace _graph_utils_bits { |
---|
589 | |
---|
590 | template <typename Graph, typename Item, typename RefMap> |
---|
591 | class MapCopyBase { |
---|
592 | public: |
---|
593 | virtual void copy(const Graph& source, const RefMap& refMap) = 0; |
---|
594 | |
---|
595 | virtual ~MapCopyBase() {} |
---|
596 | }; |
---|
597 | |
---|
598 | template <typename Graph, typename Item, typename RefMap, |
---|
599 | typename TargetMap, typename SourceMap> |
---|
600 | class MapCopy : public MapCopyBase<Graph, Item, RefMap> { |
---|
601 | public: |
---|
602 | |
---|
603 | MapCopy(TargetMap& tmap, const SourceMap& map) |
---|
604 | : _tmap(tmap), _map(map) {} |
---|
605 | |
---|
606 | virtual void copy(const Graph& graph, const RefMap& refMap) { |
---|
607 | typedef typename ItemSetTraits<Graph, Item>::ItemIt ItemIt; |
---|
608 | for (ItemIt it(graph); it != INVALID; ++it) { |
---|
609 | _tmap.set(refMap[it], _map[it]); |
---|
610 | } |
---|
611 | } |
---|
612 | |
---|
613 | private: |
---|
614 | TargetMap& _tmap; |
---|
615 | const SourceMap& _map; |
---|
616 | }; |
---|
617 | |
---|
618 | template <typename Graph, typename Item, typename RefMap, typename Ref> |
---|
619 | class RefCopy : public MapCopyBase<Graph, Item, RefMap> { |
---|
620 | public: |
---|
621 | |
---|
622 | RefCopy(Ref& map) : _map(map) {} |
---|
623 | |
---|
624 | virtual void copy(const Graph& graph, const RefMap& refMap) { |
---|
625 | typedef typename ItemSetTraits<Graph, Item>::ItemIt ItemIt; |
---|
626 | for (ItemIt it(graph); it != INVALID; ++it) { |
---|
627 | _map.set(it, refMap[it]); |
---|
628 | } |
---|
629 | } |
---|
630 | |
---|
631 | private: |
---|
632 | Ref& _map; |
---|
633 | }; |
---|
634 | |
---|
635 | template <typename Graph, typename Item, typename RefMap, |
---|
636 | typename CrossRef> |
---|
637 | class CrossRefCopy : public MapCopyBase<Graph, Item, RefMap> { |
---|
638 | public: |
---|
639 | |
---|
640 | CrossRefCopy(CrossRef& cmap) : _cmap(cmap) {} |
---|
641 | |
---|
642 | virtual void copy(const Graph& graph, const RefMap& refMap) { |
---|
643 | typedef typename ItemSetTraits<Graph, Item>::ItemIt ItemIt; |
---|
644 | for (ItemIt it(graph); it != INVALID; ++it) { |
---|
645 | _cmap.set(refMap[it], it); |
---|
646 | } |
---|
647 | } |
---|
648 | |
---|
649 | private: |
---|
650 | CrossRef& _cmap; |
---|
651 | }; |
---|
652 | |
---|
653 | } |
---|
654 | |
---|
655 | /// \brief Class to copy a graph. |
---|
656 | /// |
---|
657 | /// Class to copy a graph to another graph (duplicate a graph). The |
---|
658 | /// simplest way of using it is through the \c copyGraph() function. |
---|
659 | template <typename Target, typename Source> |
---|
660 | class GraphCopy { |
---|
661 | private: |
---|
662 | |
---|
663 | typedef typename Source::Node Node; |
---|
664 | typedef typename Source::NodeIt NodeIt; |
---|
665 | typedef typename Source::Edge Edge; |
---|
666 | typedef typename Source::EdgeIt EdgeIt; |
---|
667 | |
---|
668 | typedef typename Target::Node TNode; |
---|
669 | typedef typename Target::Edge TEdge; |
---|
670 | |
---|
671 | typedef typename Source::template NodeMap<TNode> NodeRefMap; |
---|
672 | typedef typename Source::template EdgeMap<TEdge> EdgeRefMap; |
---|
673 | |
---|
674 | |
---|
675 | public: |
---|
676 | |
---|
677 | |
---|
678 | /// \brief Constructor for the GraphCopy. |
---|
679 | /// |
---|
680 | /// It copies the content of the \c _source graph into the |
---|
681 | /// \c _target graph. |
---|
682 | GraphCopy(Target& _target, const Source& _source) |
---|
683 | : source(_source), target(_target) {} |
---|
684 | |
---|
685 | /// \brief Destructor of the GraphCopy |
---|
686 | /// |
---|
687 | /// Destructor of the GraphCopy |
---|
688 | ~GraphCopy() { |
---|
689 | for (int i = 0; i < (int)nodeMapCopies.size(); ++i) { |
---|
690 | delete nodeMapCopies[i]; |
---|
691 | } |
---|
692 | for (int i = 0; i < (int)edgeMapCopies.size(); ++i) { |
---|
693 | delete edgeMapCopies[i]; |
---|
694 | } |
---|
695 | |
---|
696 | } |
---|
697 | |
---|
698 | /// \brief Copies the node references into the given map. |
---|
699 | /// |
---|
700 | /// Copies the node references into the given map. |
---|
701 | template <typename NodeRef> |
---|
702 | GraphCopy& nodeRef(NodeRef& map) { |
---|
703 | nodeMapCopies.push_back(new _graph_utils_bits::RefCopy<Source, Node, |
---|
704 | NodeRefMap, NodeRef>(map)); |
---|
705 | return *this; |
---|
706 | } |
---|
707 | |
---|
708 | /// \brief Reverse and copies the node references into the given map. |
---|
709 | /// |
---|
710 | /// Reverse and copies the node references into the given map. |
---|
711 | template <typename NodeCrossRef> |
---|
712 | GraphCopy& nodeCrossRef(NodeCrossRef& map) { |
---|
713 | nodeMapCopies.push_back(new _graph_utils_bits::CrossRefCopy<Source, Node, |
---|
714 | NodeRefMap, NodeCrossRef>(map)); |
---|
715 | return *this; |
---|
716 | } |
---|
717 | |
---|
718 | /// \brief Make copy of the given map. |
---|
719 | /// |
---|
720 | /// Makes copy of the given map for the newly created graph. |
---|
721 | /// The new map's key type is the target graph's node type, |
---|
722 | /// and the copied map's key type is the source graph's node |
---|
723 | /// type. |
---|
724 | template <typename TargetMap, typename SourceMap> |
---|
725 | GraphCopy& nodeMap(TargetMap& tmap, const SourceMap& map) { |
---|
726 | nodeMapCopies.push_back(new _graph_utils_bits::MapCopy<Source, Node, |
---|
727 | NodeRefMap, TargetMap, SourceMap>(tmap, map)); |
---|
728 | return *this; |
---|
729 | } |
---|
730 | |
---|
731 | /// \brief Copies the edge references into the given map. |
---|
732 | /// |
---|
733 | /// Copies the edge references into the given map. |
---|
734 | template <typename EdgeRef> |
---|
735 | GraphCopy& edgeRef(EdgeRef& map) { |
---|
736 | edgeMapCopies.push_back(new _graph_utils_bits::RefCopy<Source, Edge, |
---|
737 | EdgeRefMap, EdgeRef>(map)); |
---|
738 | return *this; |
---|
739 | } |
---|
740 | |
---|
741 | /// \brief Reverse and copies the edge references into the given map. |
---|
742 | /// |
---|
743 | /// Reverse and copies the edge references into the given map. |
---|
744 | template <typename EdgeCrossRef> |
---|
745 | GraphCopy& edgeCrossRef(EdgeCrossRef& map) { |
---|
746 | edgeMapCopies.push_back(new _graph_utils_bits::CrossRefCopy<Source, Edge, |
---|
747 | EdgeRefMap, EdgeCrossRef>(map)); |
---|
748 | return *this; |
---|
749 | } |
---|
750 | |
---|
751 | /// \brief Make copy of the given map. |
---|
752 | /// |
---|
753 | /// Makes copy of the given map for the newly created graph. |
---|
754 | /// The new map's key type is the target graph's edge type, |
---|
755 | /// and the copied map's key type is the source graph's edge |
---|
756 | /// type. |
---|
757 | template <typename TargetMap, typename SourceMap> |
---|
758 | GraphCopy& edgeMap(TargetMap& tmap, const SourceMap& map) { |
---|
759 | edgeMapCopies.push_back(new _graph_utils_bits::MapCopy<Source, Edge, |
---|
760 | EdgeRefMap, TargetMap, SourceMap>(tmap, map)); |
---|
761 | return *this; |
---|
762 | } |
---|
763 | |
---|
764 | /// \brief Executes the copies. |
---|
765 | /// |
---|
766 | /// Executes the copies. |
---|
767 | void run() { |
---|
768 | NodeRefMap nodeRefMap(source); |
---|
769 | for (NodeIt it(source); it != INVALID; ++it) { |
---|
770 | nodeRefMap[it] = target.addNode(); |
---|
771 | } |
---|
772 | for (int i = 0; i < (int)nodeMapCopies.size(); ++i) { |
---|
773 | nodeMapCopies[i]->copy(source, nodeRefMap); |
---|
774 | } |
---|
775 | EdgeRefMap edgeRefMap(source); |
---|
776 | for (EdgeIt it(source); it != INVALID; ++it) { |
---|
777 | edgeRefMap[it] = target.addEdge(nodeRefMap[source.source(it)], |
---|
778 | nodeRefMap[source.target(it)]); |
---|
779 | } |
---|
780 | for (int i = 0; i < (int)edgeMapCopies.size(); ++i) { |
---|
781 | edgeMapCopies[i]->copy(source, edgeRefMap); |
---|
782 | } |
---|
783 | } |
---|
784 | |
---|
785 | private: |
---|
786 | |
---|
787 | const Source& source; |
---|
788 | Target& target; |
---|
789 | |
---|
790 | std::vector<_graph_utils_bits::MapCopyBase<Source, Node, NodeRefMap>* > |
---|
791 | nodeMapCopies; |
---|
792 | |
---|
793 | std::vector<_graph_utils_bits::MapCopyBase<Source, Edge, EdgeRefMap>* > |
---|
794 | edgeMapCopies; |
---|
795 | |
---|
796 | }; |
---|
797 | |
---|
798 | /// \brief Copy a graph to another graph. |
---|
799 | /// |
---|
800 | /// Copy a graph to another graph. |
---|
801 | /// The usage of the function: |
---|
802 | /// |
---|
803 | ///\code |
---|
804 | /// copyGraph(trg, src).nodeRef(nr).edgeCrossRef(ecr).run(); |
---|
805 | ///\endcode |
---|
806 | /// |
---|
807 | /// After the copy the \c nr map will contain the mapping from the |
---|
808 | /// source graph's nodes to the target graph's nodes and the \c ecr will |
---|
809 | /// contain the mapping from the target graph's edges to the source's |
---|
810 | /// edges. |
---|
811 | template <typename Target, typename Source> |
---|
812 | GraphCopy<Target, Source> copyGraph(Target& target, const Source& source) { |
---|
813 | return GraphCopy<Target, Source>(target, source); |
---|
814 | } |
---|
815 | |
---|
816 | /// \brief Class to copy an undirected graph. |
---|
817 | /// |
---|
818 | /// Class to copy an undirected graph to another graph (duplicate a graph). |
---|
819 | /// The simplest way of using it is through the \c copyUGraph() function. |
---|
820 | template <typename Target, typename Source> |
---|
821 | class UGraphCopy { |
---|
822 | private: |
---|
823 | |
---|
824 | typedef typename Source::Node Node; |
---|
825 | typedef typename Source::NodeIt NodeIt; |
---|
826 | typedef typename Source::Edge Edge; |
---|
827 | typedef typename Source::EdgeIt EdgeIt; |
---|
828 | typedef typename Source::UEdge UEdge; |
---|
829 | typedef typename Source::UEdgeIt UEdgeIt; |
---|
830 | |
---|
831 | typedef typename Target::Node TNode; |
---|
832 | typedef typename Target::Edge TEdge; |
---|
833 | typedef typename Target::UEdge TUEdge; |
---|
834 | |
---|
835 | typedef typename Source::template NodeMap<TNode> NodeRefMap; |
---|
836 | typedef typename Source::template UEdgeMap<TUEdge> UEdgeRefMap; |
---|
837 | |
---|
838 | struct EdgeRefMap { |
---|
839 | EdgeRefMap(const Target& _target, const Source& _source, |
---|
840 | const UEdgeRefMap& _uedge_ref, const NodeRefMap& _node_ref) |
---|
841 | : target(_target), source(_source), |
---|
842 | uedge_ref(_uedge_ref), node_ref(_node_ref) {} |
---|
843 | |
---|
844 | typedef typename Source::Edge Key; |
---|
845 | typedef typename Target::Edge Value; |
---|
846 | |
---|
847 | Value operator[](const Key& key) const { |
---|
848 | bool forward = (source.direction(key) == |
---|
849 | (node_ref[source.source((UEdge)key)] == |
---|
850 | target.source(uedge_ref[(UEdge)key]))); |
---|
851 | return target.direct(uedge_ref[key], forward); |
---|
852 | } |
---|
853 | |
---|
854 | const Target& target; |
---|
855 | const Source& source; |
---|
856 | const UEdgeRefMap& uedge_ref; |
---|
857 | const NodeRefMap& node_ref; |
---|
858 | }; |
---|
859 | |
---|
860 | |
---|
861 | public: |
---|
862 | |
---|
863 | |
---|
864 | /// \brief Constructor for the GraphCopy. |
---|
865 | /// |
---|
866 | /// It copies the content of the \c _source graph into the |
---|
867 | /// \c _target graph. |
---|
868 | UGraphCopy(Target& _target, const Source& _source) |
---|
869 | : source(_source), target(_target) {} |
---|
870 | |
---|
871 | /// \brief Destructor of the GraphCopy |
---|
872 | /// |
---|
873 | /// Destructor of the GraphCopy |
---|
874 | ~UGraphCopy() { |
---|
875 | for (int i = 0; i < (int)nodeMapCopies.size(); ++i) { |
---|
876 | delete nodeMapCopies[i]; |
---|
877 | } |
---|
878 | for (int i = 0; i < (int)edgeMapCopies.size(); ++i) { |
---|
879 | delete edgeMapCopies[i]; |
---|
880 | } |
---|
881 | for (int i = 0; i < (int)uEdgeMapCopies.size(); ++i) { |
---|
882 | delete uEdgeMapCopies[i]; |
---|
883 | } |
---|
884 | |
---|
885 | } |
---|
886 | |
---|
887 | /// \brief Copies the node references into the given map. |
---|
888 | /// |
---|
889 | /// Copies the node references into the given map. |
---|
890 | template <typename NodeRef> |
---|
891 | UGraphCopy& nodeRef(NodeRef& map) { |
---|
892 | nodeMapCopies.push_back(new _graph_utils_bits::RefCopy<Source, Node, |
---|
893 | NodeRefMap, NodeRef>(map)); |
---|
894 | return *this; |
---|
895 | } |
---|
896 | |
---|
897 | /// \brief Reverse and copies the node references into the given map. |
---|
898 | /// |
---|
899 | /// Reverse and copies the node references into the given map. |
---|
900 | template <typename NodeCrossRef> |
---|
901 | UGraphCopy& nodeCrossRef(NodeCrossRef& map) { |
---|
902 | nodeMapCopies.push_back(new _graph_utils_bits::CrossRefCopy<Source, Node, |
---|
903 | NodeRefMap, NodeCrossRef>(map)); |
---|
904 | return *this; |
---|
905 | } |
---|
906 | |
---|
907 | /// \brief Make copy of the given map. |
---|
908 | /// |
---|
909 | /// Makes copy of the given map for the newly created graph. |
---|
910 | /// The new map's key type is the target graph's node type, |
---|
911 | /// and the copied map's key type is the source graph's node |
---|
912 | /// type. |
---|
913 | template <typename TargetMap, typename SourceMap> |
---|
914 | UGraphCopy& nodeMap(TargetMap& tmap, const SourceMap& map) { |
---|
915 | nodeMapCopies.push_back(new _graph_utils_bits::MapCopy<Source, Node, |
---|
916 | NodeRefMap, TargetMap, SourceMap>(tmap, map)); |
---|
917 | return *this; |
---|
918 | } |
---|
919 | |
---|
920 | /// \brief Copies the edge references into the given map. |
---|
921 | /// |
---|
922 | /// Copies the edge references into the given map. |
---|
923 | template <typename EdgeRef> |
---|
924 | UGraphCopy& edgeRef(EdgeRef& map) { |
---|
925 | edgeMapCopies.push_back(new _graph_utils_bits::RefCopy<Source, Edge, |
---|
926 | EdgeRefMap, EdgeRef>(map)); |
---|
927 | return *this; |
---|
928 | } |
---|
929 | |
---|
930 | /// \brief Reverse and copies the edge references into the given map. |
---|
931 | /// |
---|
932 | /// Reverse and copies the edge references into the given map. |
---|
933 | template <typename EdgeCrossRef> |
---|
934 | UGraphCopy& edgeCrossRef(EdgeCrossRef& map) { |
---|
935 | edgeMapCopies.push_back(new _graph_utils_bits::CrossRefCopy<Source, Edge, |
---|
936 | EdgeRefMap, EdgeCrossRef>(map)); |
---|
937 | return *this; |
---|
938 | } |
---|
939 | |
---|
940 | /// \brief Make copy of the given map. |
---|
941 | /// |
---|
942 | /// Makes copy of the given map for the newly created graph. |
---|
943 | /// The new map's key type is the target graph's edge type, |
---|
944 | /// and the copied map's key type is the source graph's edge |
---|
945 | /// type. |
---|
946 | template <typename TargetMap, typename SourceMap> |
---|
947 | UGraphCopy& edgeMap(TargetMap& tmap, const SourceMap& map) { |
---|
948 | edgeMapCopies.push_back(new _graph_utils_bits::MapCopy<Source, Edge, |
---|
949 | EdgeRefMap, TargetMap, SourceMap>(tmap, map)); |
---|
950 | return *this; |
---|
951 | } |
---|
952 | |
---|
953 | /// \brief Copies the uEdge references into the given map. |
---|
954 | /// |
---|
955 | /// Copies the uEdge references into the given map. |
---|
956 | template <typename UEdgeRef> |
---|
957 | UGraphCopy& uEdgeRef(UEdgeRef& map) { |
---|
958 | uEdgeMapCopies.push_back(new _graph_utils_bits::RefCopy<Source, UEdge, |
---|
959 | UEdgeRefMap, UEdgeRef>(map)); |
---|
960 | return *this; |
---|
961 | } |
---|
962 | |
---|
963 | /// \brief Reverse and copies the uEdge references into the given map. |
---|
964 | /// |
---|
965 | /// Reverse and copies the uEdge references into the given map. |
---|
966 | template <typename UEdgeCrossRef> |
---|
967 | UGraphCopy& uEdgeCrossRef(UEdgeCrossRef& map) { |
---|
968 | uEdgeMapCopies.push_back(new _graph_utils_bits::CrossRefCopy<Source, |
---|
969 | UEdge, UEdgeRefMap, UEdgeCrossRef>(map)); |
---|
970 | return *this; |
---|
971 | } |
---|
972 | |
---|
973 | /// \brief Make copy of the given map. |
---|
974 | /// |
---|
975 | /// Makes copy of the given map for the newly created graph. |
---|
976 | /// The new map's key type is the target graph's uEdge type, |
---|
977 | /// and the copied map's key type is the source graph's uEdge |
---|
978 | /// type. |
---|
979 | template <typename TargetMap, typename SourceMap> |
---|
980 | UGraphCopy& uEdgeMap(TargetMap& tmap, const SourceMap& map) { |
---|
981 | uEdgeMapCopies.push_back(new _graph_utils_bits::MapCopy<Source, UEdge, |
---|
982 | UEdgeRefMap, TargetMap, SourceMap>(tmap, map)); |
---|
983 | return *this; |
---|
984 | } |
---|
985 | |
---|
986 | /// \brief Executes the copies. |
---|
987 | /// |
---|
988 | /// Executes the copies. |
---|
989 | void run() { |
---|
990 | NodeRefMap nodeRefMap(source); |
---|
991 | for (NodeIt it(source); it != INVALID; ++it) { |
---|
992 | nodeRefMap[it] = target.addNode(); |
---|
993 | } |
---|
994 | for (int i = 0; i < (int)nodeMapCopies.size(); ++i) { |
---|
995 | nodeMapCopies[i]->copy(source, nodeRefMap); |
---|
996 | } |
---|
997 | UEdgeRefMap uEdgeRefMap(source); |
---|
998 | EdgeRefMap edgeRefMap(target, source, uEdgeRefMap, nodeRefMap); |
---|
999 | for (UEdgeIt it(source); it != INVALID; ++it) { |
---|
1000 | uEdgeRefMap[it] = target.addEdge(nodeRefMap[source.source(it)], |
---|
1001 | nodeRefMap[source.target(it)]); |
---|
1002 | } |
---|
1003 | for (int i = 0; i < (int)uEdgeMapCopies.size(); ++i) { |
---|
1004 | uEdgeMapCopies[i]->copy(source, uEdgeRefMap); |
---|
1005 | } |
---|
1006 | for (int i = 0; i < (int)edgeMapCopies.size(); ++i) { |
---|
1007 | edgeMapCopies[i]->copy(source, edgeRefMap); |
---|
1008 | } |
---|
1009 | } |
---|
1010 | |
---|
1011 | private: |
---|
1012 | |
---|
1013 | const Source& source; |
---|
1014 | Target& target; |
---|
1015 | |
---|
1016 | std::vector<_graph_utils_bits::MapCopyBase<Source, Node, NodeRefMap>* > |
---|
1017 | nodeMapCopies; |
---|
1018 | |
---|
1019 | std::vector<_graph_utils_bits::MapCopyBase<Source, Edge, EdgeRefMap>* > |
---|
1020 | edgeMapCopies; |
---|
1021 | |
---|
1022 | std::vector<_graph_utils_bits::MapCopyBase<Source, UEdge, UEdgeRefMap>* > |
---|
1023 | uEdgeMapCopies; |
---|
1024 | |
---|
1025 | }; |
---|
1026 | |
---|
1027 | /// \brief Copy a graph to another graph. |
---|
1028 | /// |
---|
1029 | /// Copy a graph to another graph. |
---|
1030 | /// The usage of the function: |
---|
1031 | /// |
---|
1032 | ///\code |
---|
1033 | /// copyUGraph(trg, src).nodeRef(nr).edgeCrossRef(ecr).run(); |
---|
1034 | ///\endcode |
---|
1035 | /// |
---|
1036 | /// After the copy the \c nr map will contain the mapping from the |
---|
1037 | /// source graph's nodes to the target graph's nodes and the \c ecr will |
---|
1038 | /// contain the mapping from the target graph's edges to the source's |
---|
1039 | /// edges. |
---|
1040 | template <typename Target, typename Source> |
---|
1041 | UGraphCopy<Target, Source> |
---|
1042 | copyUGraph(Target& target, const Source& source) { |
---|
1043 | return UGraphCopy<Target, Source>(target, source); |
---|
1044 | } |
---|
1045 | |
---|
1046 | |
---|
1047 | /// @} |
---|
1048 | |
---|
1049 | /// \addtogroup graph_maps |
---|
1050 | /// @{ |
---|
1051 | |
---|
1052 | /// Provides an immutable and unique id for each item in the graph. |
---|
1053 | |
---|
1054 | /// The IdMap class provides a unique and immutable id for each item of the |
---|
1055 | /// same type (e.g. node) in the graph. This id is <ul><li>\b unique: |
---|
1056 | /// different items (nodes) get different ids <li>\b immutable: the id of an |
---|
1057 | /// item (node) does not change (even if you delete other nodes). </ul> |
---|
1058 | /// Through this map you get access (i.e. can read) the inner id values of |
---|
1059 | /// the items stored in the graph. This map can be inverted with its member |
---|
1060 | /// class \c InverseMap. |
---|
1061 | /// |
---|
1062 | template <typename _Graph, typename _Item> |
---|
1063 | class IdMap { |
---|
1064 | public: |
---|
1065 | typedef _Graph Graph; |
---|
1066 | typedef int Value; |
---|
1067 | typedef _Item Item; |
---|
1068 | typedef _Item Key; |
---|
1069 | |
---|
1070 | /// \brief Constructor. |
---|
1071 | /// |
---|
1072 | /// Constructor for creating id map. |
---|
1073 | explicit IdMap(const Graph& _graph) : graph(&_graph) {} |
---|
1074 | |
---|
1075 | /// \brief Gives back the \e id of the item. |
---|
1076 | /// |
---|
1077 | /// Gives back the immutable and unique \e id of the map. |
---|
1078 | int operator[](const Item& item) const { return graph->id(item);} |
---|
1079 | |
---|
1080 | |
---|
1081 | private: |
---|
1082 | const Graph* graph; |
---|
1083 | |
---|
1084 | public: |
---|
1085 | |
---|
1086 | /// \brief The class represents the inverse of its owner (IdMap). |
---|
1087 | /// |
---|
1088 | /// The class represents the inverse of its owner (IdMap). |
---|
1089 | /// \see inverse() |
---|
1090 | class InverseMap { |
---|
1091 | public: |
---|
1092 | |
---|
1093 | /// \brief Constructor. |
---|
1094 | /// |
---|
1095 | /// Constructor for creating an id-to-item map. |
---|
1096 | explicit InverseMap(const Graph& _graph) : graph(&_graph) {} |
---|
1097 | |
---|
1098 | /// \brief Constructor. |
---|
1099 | /// |
---|
1100 | /// Constructor for creating an id-to-item map. |
---|
1101 | explicit InverseMap(const IdMap& idMap) : graph(idMap.graph) {} |
---|
1102 | |
---|
1103 | /// \brief Gives back the given item from its id. |
---|
1104 | /// |
---|
1105 | /// Gives back the given item from its id. |
---|
1106 | /// |
---|
1107 | Item operator[](int id) const { return graph->fromId(id, Item());} |
---|
1108 | private: |
---|
1109 | const Graph* graph; |
---|
1110 | }; |
---|
1111 | |
---|
1112 | /// \brief Gives back the inverse of the map. |
---|
1113 | /// |
---|
1114 | /// Gives back the inverse of the IdMap. |
---|
1115 | InverseMap inverse() const { return InverseMap(*graph);} |
---|
1116 | |
---|
1117 | }; |
---|
1118 | |
---|
1119 | |
---|
1120 | /// \brief General invertable graph-map type. |
---|
1121 | |
---|
1122 | /// This type provides simple invertable graph-maps. |
---|
1123 | /// The InvertableMap wraps an arbitrary ReadWriteMap |
---|
1124 | /// and if a key is set to a new value then store it |
---|
1125 | /// in the inverse map. |
---|
1126 | /// |
---|
1127 | /// The values of the map can be accessed |
---|
1128 | /// with stl compatible forward iterator. |
---|
1129 | /// |
---|
1130 | /// \param _Graph The graph type. |
---|
1131 | /// \param _Item The item type of the graph. |
---|
1132 | /// \param _Value The value type of the map. |
---|
1133 | /// |
---|
1134 | /// \see IterableValueMap |
---|
1135 | #ifndef DOXYGEN |
---|
1136 | /// \param _Map A ReadWriteMap mapping from the item type to integer. |
---|
1137 | template < |
---|
1138 | typename _Graph, typename _Item, typename _Value, |
---|
1139 | typename _Map = DefaultMap<_Graph, _Item, _Value> |
---|
1140 | > |
---|
1141 | #else |
---|
1142 | template <typename _Graph, typename _Item, typename _Value> |
---|
1143 | #endif |
---|
1144 | class InvertableMap : protected _Map { |
---|
1145 | public: |
---|
1146 | |
---|
1147 | /// The key type of InvertableMap (Node, Edge, UEdge). |
---|
1148 | typedef typename _Map::Key Key; |
---|
1149 | /// The value type of the InvertableMap. |
---|
1150 | typedef typename _Map::Value Value; |
---|
1151 | |
---|
1152 | private: |
---|
1153 | |
---|
1154 | typedef _Map Map; |
---|
1155 | typedef _Graph Graph; |
---|
1156 | |
---|
1157 | typedef std::map<Value, Key> Container; |
---|
1158 | Container invMap; |
---|
1159 | |
---|
1160 | public: |
---|
1161 | |
---|
1162 | |
---|
1163 | |
---|
1164 | /// \brief Constructor. |
---|
1165 | /// |
---|
1166 | /// Construct a new InvertableMap for the graph. |
---|
1167 | /// |
---|
1168 | explicit InvertableMap(const Graph& graph) : Map(graph) {} |
---|
1169 | |
---|
1170 | /// \brief Forward iterator for values. |
---|
1171 | /// |
---|
1172 | /// This iterator is an stl compatible forward |
---|
1173 | /// iterator on the values of the map. The values can |
---|
1174 | /// be accessed in the [beginValue, endValue) range. |
---|
1175 | /// |
---|
1176 | class ValueIterator |
---|
1177 | : public std::iterator<std::forward_iterator_tag, Value> { |
---|
1178 | friend class InvertableMap; |
---|
1179 | private: |
---|
1180 | ValueIterator(typename Container::const_iterator _it) |
---|
1181 | : it(_it) {} |
---|
1182 | public: |
---|
1183 | |
---|
1184 | ValueIterator() {} |
---|
1185 | |
---|
1186 | ValueIterator& operator++() { ++it; return *this; } |
---|
1187 | ValueIterator operator++(int) { |
---|
1188 | ValueIterator tmp(*this); |
---|
1189 | operator++(); |
---|
1190 | return tmp; |
---|
1191 | } |
---|
1192 | |
---|
1193 | const Value& operator*() const { return it->first; } |
---|
1194 | const Value* operator->() const { return &(it->first); } |
---|
1195 | |
---|
1196 | bool operator==(ValueIterator jt) const { return it == jt.it; } |
---|
1197 | bool operator!=(ValueIterator jt) const { return it != jt.it; } |
---|
1198 | |
---|
1199 | private: |
---|
1200 | typename Container::const_iterator it; |
---|
1201 | }; |
---|
1202 | |
---|
1203 | /// \brief Returns an iterator to the first value. |
---|
1204 | /// |
---|
1205 | /// Returns an stl compatible iterator to the |
---|
1206 | /// first value of the map. The values of the |
---|
1207 | /// map can be accessed in the [beginValue, endValue) |
---|
1208 | /// range. |
---|
1209 | ValueIterator beginValue() const { |
---|
1210 | return ValueIterator(invMap.begin()); |
---|
1211 | } |
---|
1212 | |
---|
1213 | /// \brief Returns an iterator after the last value. |
---|
1214 | /// |
---|
1215 | /// Returns an stl compatible iterator after the |
---|
1216 | /// last value of the map. The values of the |
---|
1217 | /// map can be accessed in the [beginValue, endValue) |
---|
1218 | /// range. |
---|
1219 | ValueIterator endValue() const { |
---|
1220 | return ValueIterator(invMap.end()); |
---|
1221 | } |
---|
1222 | |
---|
1223 | /// \brief The setter function of the map. |
---|
1224 | /// |
---|
1225 | /// Sets the mapped value. |
---|
1226 | void set(const Key& key, const Value& val) { |
---|
1227 | Value oldval = Map::operator[](key); |
---|
1228 | typename Container::iterator it = invMap.find(oldval); |
---|
1229 | if (it != invMap.end() && it->second == key) { |
---|
1230 | invMap.erase(it); |
---|
1231 | } |
---|
1232 | invMap.insert(make_pair(val, key)); |
---|
1233 | Map::set(key, val); |
---|
1234 | } |
---|
1235 | |
---|
1236 | /// \brief The getter function of the map. |
---|
1237 | /// |
---|
1238 | /// It gives back the value associated with the key. |
---|
1239 | typename MapTraits<Map>::ConstReturnValue |
---|
1240 | operator[](const Key& key) const { |
---|
1241 | return Map::operator[](key); |
---|
1242 | } |
---|
1243 | |
---|
1244 | protected: |
---|
1245 | |
---|
1246 | /// \brief Erase the key from the map. |
---|
1247 | /// |
---|
1248 | /// Erase the key to the map. It is called by the |
---|
1249 | /// \c AlterationNotifier. |
---|
1250 | virtual void erase(const Key& key) { |
---|
1251 | Value val = Map::operator[](key); |
---|
1252 | typename Container::iterator it = invMap.find(val); |
---|
1253 | if (it != invMap.end() && it->second == key) { |
---|
1254 | invMap.erase(it); |
---|
1255 | } |
---|
1256 | Map::erase(key); |
---|
1257 | } |
---|
1258 | |
---|
1259 | /// \brief Erase more keys from the map. |
---|
1260 | /// |
---|
1261 | /// Erase more keys from the map. It is called by the |
---|
1262 | /// \c AlterationNotifier. |
---|
1263 | virtual void erase(const std::vector<Key>& keys) { |
---|
1264 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
1265 | Value val = Map::operator[](keys[i]); |
---|
1266 | typename Container::iterator it = invMap.find(val); |
---|
1267 | if (it != invMap.end() && it->second == keys[i]) { |
---|
1268 | invMap.erase(it); |
---|
1269 | } |
---|
1270 | } |
---|
1271 | Map::erase(keys); |
---|
1272 | } |
---|
1273 | |
---|
1274 | /// \brief Clear the keys from the map and inverse map. |
---|
1275 | /// |
---|
1276 | /// Clear the keys from the map and inverse map. It is called by the |
---|
1277 | /// \c AlterationNotifier. |
---|
1278 | virtual void clear() { |
---|
1279 | invMap.clear(); |
---|
1280 | Map::clear(); |
---|
1281 | } |
---|
1282 | |
---|
1283 | public: |
---|
1284 | |
---|
1285 | /// \brief The inverse map type. |
---|
1286 | /// |
---|
1287 | /// The inverse of this map. The subscript operator of the map |
---|
1288 | /// gives back always the item what was last assigned to the value. |
---|
1289 | class InverseMap { |
---|
1290 | public: |
---|
1291 | /// \brief Constructor of the InverseMap. |
---|
1292 | /// |
---|
1293 | /// Constructor of the InverseMap. |
---|
1294 | explicit InverseMap(const InvertableMap& _inverted) |
---|
1295 | : inverted(_inverted) {} |
---|
1296 | |
---|
1297 | /// The value type of the InverseMap. |
---|
1298 | typedef typename InvertableMap::Key Value; |
---|
1299 | /// The key type of the InverseMap. |
---|
1300 | typedef typename InvertableMap::Value Key; |
---|
1301 | |
---|
1302 | /// \brief Subscript operator. |
---|
1303 | /// |
---|
1304 | /// Subscript operator. It gives back always the item |
---|
1305 | /// what was last assigned to the value. |
---|
1306 | Value operator[](const Key& key) const { |
---|
1307 | typename Container::const_iterator it = inverted.invMap.find(key); |
---|
1308 | return it->second; |
---|
1309 | } |
---|
1310 | |
---|
1311 | private: |
---|
1312 | const InvertableMap& inverted; |
---|
1313 | }; |
---|
1314 | |
---|
1315 | /// \brief It gives back the just readable inverse map. |
---|
1316 | /// |
---|
1317 | /// It gives back the just readable inverse map. |
---|
1318 | InverseMap inverse() const { |
---|
1319 | return InverseMap(*this); |
---|
1320 | } |
---|
1321 | |
---|
1322 | |
---|
1323 | |
---|
1324 | }; |
---|
1325 | |
---|
1326 | /// \brief Provides a mutable, continuous and unique descriptor for each |
---|
1327 | /// item in the graph. |
---|
1328 | /// |
---|
1329 | /// The DescriptorMap class provides a unique and continuous (but mutable) |
---|
1330 | /// descriptor (id) for each item of the same type (e.g. node) in the |
---|
1331 | /// graph. This id is <ul><li>\b unique: different items (nodes) get |
---|
1332 | /// different ids <li>\b continuous: the range of the ids is the set of |
---|
1333 | /// integers between 0 and \c n-1, where \c n is the number of the items of |
---|
1334 | /// this type (e.g. nodes) (so the id of a node can change if you delete an |
---|
1335 | /// other node, i.e. this id is mutable). </ul> This map can be inverted |
---|
1336 | /// with its member class \c InverseMap. |
---|
1337 | /// |
---|
1338 | /// \param _Graph The graph class the \c DescriptorMap belongs to. |
---|
1339 | /// \param _Item The Item is the Key of the Map. It may be Node, Edge or |
---|
1340 | /// UEdge. |
---|
1341 | #ifndef DOXYGEN |
---|
1342 | /// \param _Map A ReadWriteMap mapping from the item type to integer. |
---|
1343 | template < |
---|
1344 | typename _Graph, typename _Item, |
---|
1345 | typename _Map = DefaultMap<_Graph, _Item, int> |
---|
1346 | > |
---|
1347 | #else |
---|
1348 | template <typename _Graph, typename _Item> |
---|
1349 | #endif |
---|
1350 | class DescriptorMap : protected _Map { |
---|
1351 | |
---|
1352 | typedef _Item Item; |
---|
1353 | typedef _Map Map; |
---|
1354 | |
---|
1355 | public: |
---|
1356 | /// The graph class of DescriptorMap. |
---|
1357 | typedef _Graph Graph; |
---|
1358 | |
---|
1359 | /// The key type of DescriptorMap (Node, Edge, UEdge). |
---|
1360 | typedef typename _Map::Key Key; |
---|
1361 | /// The value type of DescriptorMap. |
---|
1362 | typedef typename _Map::Value Value; |
---|
1363 | |
---|
1364 | /// \brief Constructor. |
---|
1365 | /// |
---|
1366 | /// Constructor for descriptor map. |
---|
1367 | explicit DescriptorMap(const Graph& _graph) : Map(_graph) { |
---|
1368 | Item it; |
---|
1369 | const typename Map::Notifier* notifier = Map::getNotifier(); |
---|
1370 | for (notifier->first(it); it != INVALID; notifier->next(it)) { |
---|
1371 | Map::set(it, invMap.size()); |
---|
1372 | invMap.push_back(it); |
---|
1373 | } |
---|
1374 | } |
---|
1375 | |
---|
1376 | |
---|
1377 | protected: |
---|
1378 | |
---|
1379 | /// \brief Add a new key to the map. |
---|
1380 | /// |
---|
1381 | /// Add a new key to the map. It is called by the |
---|
1382 | /// \c AlterationNotifier. |
---|
1383 | virtual void add(const Item& item) { |
---|
1384 | Map::add(item); |
---|
1385 | Map::set(item, invMap.size()); |
---|
1386 | invMap.push_back(item); |
---|
1387 | } |
---|
1388 | |
---|
1389 | /// \brief Add more new keys to the map. |
---|
1390 | /// |
---|
1391 | /// Add more new keys to the map. It is called by the |
---|
1392 | /// \c AlterationNotifier. |
---|
1393 | virtual void add(const std::vector<Item>& items) { |
---|
1394 | Map::add(items); |
---|
1395 | for (int i = 0; i < (int)items.size(); ++i) { |
---|
1396 | Map::set(items[i], invMap.size()); |
---|
1397 | invMap.push_back(items[i]); |
---|
1398 | } |
---|
1399 | } |
---|
1400 | |
---|
1401 | /// \brief Erase the key from the map. |
---|
1402 | /// |
---|
1403 | /// Erase the key from the map. It is called by the |
---|
1404 | /// \c AlterationNotifier. |
---|
1405 | virtual void erase(const Item& item) { |
---|
1406 | Map::set(invMap.back(), Map::operator[](item)); |
---|
1407 | invMap[Map::operator[](item)] = invMap.back(); |
---|
1408 | invMap.pop_back(); |
---|
1409 | Map::erase(item); |
---|
1410 | } |
---|
1411 | |
---|
1412 | /// \brief Erase more keys from the map. |
---|
1413 | /// |
---|
1414 | /// Erase more keys from the map. It is called by the |
---|
1415 | /// \c AlterationNotifier. |
---|
1416 | virtual void erase(const std::vector<Item>& items) { |
---|
1417 | for (int i = 0; i < (int)items.size(); ++i) { |
---|
1418 | Map::set(invMap.back(), Map::operator[](items[i])); |
---|
1419 | invMap[Map::operator[](items[i])] = invMap.back(); |
---|
1420 | invMap.pop_back(); |
---|
1421 | } |
---|
1422 | Map::erase(items); |
---|
1423 | } |
---|
1424 | |
---|
1425 | /// \brief Build the unique map. |
---|
1426 | /// |
---|
1427 | /// Build the unique map. It is called by the |
---|
1428 | /// \c AlterationNotifier. |
---|
1429 | virtual void build() { |
---|
1430 | Map::build(); |
---|
1431 | Item it; |
---|
1432 | const typename Map::Notifier* notifier = Map::getNotifier(); |
---|
1433 | for (notifier->first(it); it != INVALID; notifier->next(it)) { |
---|
1434 | Map::set(it, invMap.size()); |
---|
1435 | invMap.push_back(it); |
---|
1436 | } |
---|
1437 | } |
---|
1438 | |
---|
1439 | /// \brief Clear the keys from the map. |
---|
1440 | /// |
---|
1441 | /// Clear the keys from the map. It is called by the |
---|
1442 | /// \c AlterationNotifier. |
---|
1443 | virtual void clear() { |
---|
1444 | invMap.clear(); |
---|
1445 | Map::clear(); |
---|
1446 | } |
---|
1447 | |
---|
1448 | public: |
---|
1449 | |
---|
1450 | /// \brief Returns the maximal value plus one. |
---|
1451 | /// |
---|
1452 | /// Returns the maximal value plus one in the map. |
---|
1453 | unsigned int size() const { |
---|
1454 | return invMap.size(); |
---|
1455 | } |
---|
1456 | |
---|
1457 | /// \brief Swaps the position of the two items in the map. |
---|
1458 | /// |
---|
1459 | /// Swaps the position of the two items in the map. |
---|
1460 | void swap(const Item& p, const Item& q) { |
---|
1461 | int pi = Map::operator[](p); |
---|
1462 | int qi = Map::operator[](q); |
---|
1463 | Map::set(p, qi); |
---|
1464 | invMap[qi] = p; |
---|
1465 | Map::set(q, pi); |
---|
1466 | invMap[pi] = q; |
---|
1467 | } |
---|
1468 | |
---|
1469 | /// \brief Gives back the \e descriptor of the item. |
---|
1470 | /// |
---|
1471 | /// Gives back the mutable and unique \e descriptor of the map. |
---|
1472 | int operator[](const Item& item) const { |
---|
1473 | return Map::operator[](item); |
---|
1474 | } |
---|
1475 | |
---|
1476 | private: |
---|
1477 | |
---|
1478 | typedef std::vector<Item> Container; |
---|
1479 | Container invMap; |
---|
1480 | |
---|
1481 | public: |
---|
1482 | /// \brief The inverse map type of DescriptorMap. |
---|
1483 | /// |
---|
1484 | /// The inverse map type of DescriptorMap. |
---|
1485 | class InverseMap { |
---|
1486 | public: |
---|
1487 | /// \brief Constructor of the InverseMap. |
---|
1488 | /// |
---|
1489 | /// Constructor of the InverseMap. |
---|
1490 | explicit InverseMap(const DescriptorMap& _inverted) |
---|
1491 | : inverted(_inverted) {} |
---|
1492 | |
---|
1493 | |
---|
1494 | /// The value type of the InverseMap. |
---|
1495 | typedef typename DescriptorMap::Key Value; |
---|
1496 | /// The key type of the InverseMap. |
---|
1497 | typedef typename DescriptorMap::Value Key; |
---|
1498 | |
---|
1499 | /// \brief Subscript operator. |
---|
1500 | /// |
---|
1501 | /// Subscript operator. It gives back the item |
---|
1502 | /// that the descriptor belongs to currently. |
---|
1503 | Value operator[](const Key& key) const { |
---|
1504 | return inverted.invMap[key]; |
---|
1505 | } |
---|
1506 | |
---|
1507 | /// \brief Size of the map. |
---|
1508 | /// |
---|
1509 | /// Returns the size of the map. |
---|
1510 | unsigned int size() const { |
---|
1511 | return inverted.invMap.size(); |
---|
1512 | } |
---|
1513 | |
---|
1514 | private: |
---|
1515 | const DescriptorMap& inverted; |
---|
1516 | }; |
---|
1517 | |
---|
1518 | /// \brief Gives back the inverse of the map. |
---|
1519 | /// |
---|
1520 | /// Gives back the inverse of the map. |
---|
1521 | const InverseMap inverse() const { |
---|
1522 | return InverseMap(*this); |
---|
1523 | } |
---|
1524 | }; |
---|
1525 | |
---|
1526 | /// \brief Returns the source of the given edge. |
---|
1527 | /// |
---|
1528 | /// The SourceMap gives back the source Node of the given edge. |
---|
1529 | /// \author Balazs Dezso |
---|
1530 | template <typename Graph> |
---|
1531 | class SourceMap { |
---|
1532 | public: |
---|
1533 | |
---|
1534 | typedef typename Graph::Node Value; |
---|
1535 | typedef typename Graph::Edge Key; |
---|
1536 | |
---|
1537 | /// \brief Constructor |
---|
1538 | /// |
---|
1539 | /// Constructor |
---|
1540 | /// \param _graph The graph that the map belongs to. |
---|
1541 | explicit SourceMap(const Graph& _graph) : graph(_graph) {} |
---|
1542 | |
---|
1543 | /// \brief The subscript operator. |
---|
1544 | /// |
---|
1545 | /// The subscript operator. |
---|
1546 | /// \param edge The edge |
---|
1547 | /// \return The source of the edge |
---|
1548 | Value operator[](const Key& edge) const { |
---|
1549 | return graph.source(edge); |
---|
1550 | } |
---|
1551 | |
---|
1552 | private: |
---|
1553 | const Graph& graph; |
---|
1554 | }; |
---|
1555 | |
---|
1556 | /// \brief Returns a \ref SourceMap class |
---|
1557 | /// |
---|
1558 | /// This function just returns an \ref SourceMap class. |
---|
1559 | /// \relates SourceMap |
---|
1560 | template <typename Graph> |
---|
1561 | inline SourceMap<Graph> sourceMap(const Graph& graph) { |
---|
1562 | return SourceMap<Graph>(graph); |
---|
1563 | } |
---|
1564 | |
---|
1565 | /// \brief Returns the target of the given edge. |
---|
1566 | /// |
---|
1567 | /// The TargetMap gives back the target Node of the given edge. |
---|
1568 | /// \author Balazs Dezso |
---|
1569 | template <typename Graph> |
---|
1570 | class TargetMap { |
---|
1571 | public: |
---|
1572 | |
---|
1573 | typedef typename Graph::Node Value; |
---|
1574 | typedef typename Graph::Edge Key; |
---|
1575 | |
---|
1576 | /// \brief Constructor |
---|
1577 | /// |
---|
1578 | /// Constructor |
---|
1579 | /// \param _graph The graph that the map belongs to. |
---|
1580 | explicit TargetMap(const Graph& _graph) : graph(_graph) {} |
---|
1581 | |
---|
1582 | /// \brief The subscript operator. |
---|
1583 | /// |
---|
1584 | /// The subscript operator. |
---|
1585 | /// \param e The edge |
---|
1586 | /// \return The target of the edge |
---|
1587 | Value operator[](const Key& e) const { |
---|
1588 | return graph.target(e); |
---|
1589 | } |
---|
1590 | |
---|
1591 | private: |
---|
1592 | const Graph& graph; |
---|
1593 | }; |
---|
1594 | |
---|
1595 | /// \brief Returns a \ref TargetMap class |
---|
1596 | /// |
---|
1597 | /// This function just returns a \ref TargetMap class. |
---|
1598 | /// \relates TargetMap |
---|
1599 | template <typename Graph> |
---|
1600 | inline TargetMap<Graph> targetMap(const Graph& graph) { |
---|
1601 | return TargetMap<Graph>(graph); |
---|
1602 | } |
---|
1603 | |
---|
1604 | /// \brief Returns the "forward" directed edge view of an undirected edge. |
---|
1605 | /// |
---|
1606 | /// Returns the "forward" directed edge view of an undirected edge. |
---|
1607 | /// \author Balazs Dezso |
---|
1608 | template <typename Graph> |
---|
1609 | class ForwardMap { |
---|
1610 | public: |
---|
1611 | |
---|
1612 | typedef typename Graph::Edge Value; |
---|
1613 | typedef typename Graph::UEdge Key; |
---|
1614 | |
---|
1615 | /// \brief Constructor |
---|
1616 | /// |
---|
1617 | /// Constructor |
---|
1618 | /// \param _graph The graph that the map belongs to. |
---|
1619 | explicit ForwardMap(const Graph& _graph) : graph(_graph) {} |
---|
1620 | |
---|
1621 | /// \brief The subscript operator. |
---|
1622 | /// |
---|
1623 | /// The subscript operator. |
---|
1624 | /// \param key An undirected edge |
---|
1625 | /// \return The "forward" directed edge view of undirected edge |
---|
1626 | Value operator[](const Key& key) const { |
---|
1627 | return graph.direct(key, true); |
---|
1628 | } |
---|
1629 | |
---|
1630 | private: |
---|
1631 | const Graph& graph; |
---|
1632 | }; |
---|
1633 | |
---|
1634 | /// \brief Returns a \ref ForwardMap class |
---|
1635 | /// |
---|
1636 | /// This function just returns an \ref ForwardMap class. |
---|
1637 | /// \relates ForwardMap |
---|
1638 | template <typename Graph> |
---|
1639 | inline ForwardMap<Graph> forwardMap(const Graph& graph) { |
---|
1640 | return ForwardMap<Graph>(graph); |
---|
1641 | } |
---|
1642 | |
---|
1643 | /// \brief Returns the "backward" directed edge view of an undirected edge. |
---|
1644 | /// |
---|
1645 | /// Returns the "backward" directed edge view of an undirected edge. |
---|
1646 | /// \author Balazs Dezso |
---|
1647 | template <typename Graph> |
---|
1648 | class BackwardMap { |
---|
1649 | public: |
---|
1650 | |
---|
1651 | typedef typename Graph::Edge Value; |
---|
1652 | typedef typename Graph::UEdge Key; |
---|
1653 | |
---|
1654 | /// \brief Constructor |
---|
1655 | /// |
---|
1656 | /// Constructor |
---|
1657 | /// \param _graph The graph that the map belongs to. |
---|
1658 | explicit BackwardMap(const Graph& _graph) : graph(_graph) {} |
---|
1659 | |
---|
1660 | /// \brief The subscript operator. |
---|
1661 | /// |
---|
1662 | /// The subscript operator. |
---|
1663 | /// \param key An undirected edge |
---|
1664 | /// \return The "backward" directed edge view of undirected edge |
---|
1665 | Value operator[](const Key& key) const { |
---|
1666 | return graph.direct(key, false); |
---|
1667 | } |
---|
1668 | |
---|
1669 | private: |
---|
1670 | const Graph& graph; |
---|
1671 | }; |
---|
1672 | |
---|
1673 | /// \brief Returns a \ref BackwardMap class |
---|
1674 | |
---|
1675 | /// This function just returns a \ref BackwardMap class. |
---|
1676 | /// \relates BackwardMap |
---|
1677 | template <typename Graph> |
---|
1678 | inline BackwardMap<Graph> backwardMap(const Graph& graph) { |
---|
1679 | return BackwardMap<Graph>(graph); |
---|
1680 | } |
---|
1681 | |
---|
1682 | /// \brief Potential difference map |
---|
1683 | /// |
---|
1684 | /// If there is an potential map on the nodes then we |
---|
1685 | /// can get an edge map as we get the substraction of the |
---|
1686 | /// values of the target and source. |
---|
1687 | template <typename Graph, typename NodeMap> |
---|
1688 | class PotentialDifferenceMap { |
---|
1689 | public: |
---|
1690 | typedef typename Graph::Edge Key; |
---|
1691 | typedef typename NodeMap::Value Value; |
---|
1692 | |
---|
1693 | /// \brief Constructor |
---|
1694 | /// |
---|
1695 | /// Contructor of the map |
---|
1696 | explicit PotentialDifferenceMap(const Graph& _graph, |
---|
1697 | const NodeMap& _potential) |
---|
1698 | : graph(_graph), potential(_potential) {} |
---|
1699 | |
---|
1700 | /// \brief Const subscription operator |
---|
1701 | /// |
---|
1702 | /// Const subscription operator |
---|
1703 | Value operator[](const Key& edge) const { |
---|
1704 | return potential[graph.target(edge)] - potential[graph.source(edge)]; |
---|
1705 | } |
---|
1706 | |
---|
1707 | private: |
---|
1708 | const Graph& graph; |
---|
1709 | const NodeMap& potential; |
---|
1710 | }; |
---|
1711 | |
---|
1712 | /// \brief Just returns a PotentialDifferenceMap |
---|
1713 | /// |
---|
1714 | /// Just returns a PotentialDifferenceMap |
---|
1715 | /// \relates PotentialDifferenceMap |
---|
1716 | template <typename Graph, typename NodeMap> |
---|
1717 | PotentialDifferenceMap<Graph, NodeMap> |
---|
1718 | potentialDifferenceMap(const Graph& graph, const NodeMap& potential) { |
---|
1719 | return PotentialDifferenceMap<Graph, NodeMap>(graph, potential); |
---|
1720 | } |
---|
1721 | |
---|
1722 | /// \brief Map of the node in-degrees. |
---|
1723 | /// |
---|
1724 | /// This map returns the in-degree of a node. Once it is constructed, |
---|
1725 | /// the degrees are stored in a standard NodeMap, so each query is done |
---|
1726 | /// in constant time. On the other hand, the values are updated automatically |
---|
1727 | /// whenever the graph changes. |
---|
1728 | /// |
---|
1729 | /// \warning Besides addNode() and addEdge(), a graph structure may provide |
---|
1730 | /// alternative ways to modify the graph. The correct behavior of InDegMap |
---|
1731 | /// is not guarantied if these additional features are used. For example |
---|
1732 | /// the functions \ref ListGraph::changeSource() "changeSource()", |
---|
1733 | /// \ref ListGraph::changeTarget() "changeTarget()" and |
---|
1734 | /// \ref ListGraph::reverseEdge() "reverseEdge()" |
---|
1735 | /// of \ref ListGraph will \e not update the degree values correctly. |
---|
1736 | /// |
---|
1737 | /// \sa OutDegMap |
---|
1738 | |
---|
1739 | template <typename _Graph> |
---|
1740 | class InDegMap |
---|
1741 | : protected ItemSetTraits<_Graph, typename _Graph::Edge> |
---|
1742 | ::ItemNotifier::ObserverBase { |
---|
1743 | |
---|
1744 | public: |
---|
1745 | |
---|
1746 | typedef _Graph Graph; |
---|
1747 | typedef int Value; |
---|
1748 | typedef typename Graph::Node Key; |
---|
1749 | |
---|
1750 | typedef typename ItemSetTraits<_Graph, typename _Graph::Edge> |
---|
1751 | ::ItemNotifier::ObserverBase Parent; |
---|
1752 | |
---|
1753 | private: |
---|
1754 | |
---|
1755 | class AutoNodeMap : public DefaultMap<_Graph, Key, int> { |
---|
1756 | public: |
---|
1757 | |
---|
1758 | typedef DefaultMap<_Graph, Key, int> Parent; |
---|
1759 | typedef typename Parent::Graph Graph; |
---|
1760 | |
---|
1761 | AutoNodeMap(const Graph& graph) : Parent(graph, 0) {} |
---|
1762 | |
---|
1763 | virtual void add(const Key& key) { |
---|
1764 | Parent::add(key); |
---|
1765 | Parent::set(key, 0); |
---|
1766 | } |
---|
1767 | |
---|
1768 | virtual void add(const std::vector<Key>& keys) { |
---|
1769 | Parent::add(keys); |
---|
1770 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
1771 | Parent::set(keys[i], 0); |
---|
1772 | } |
---|
1773 | } |
---|
1774 | }; |
---|
1775 | |
---|
1776 | public: |
---|
1777 | |
---|
1778 | /// \brief Constructor. |
---|
1779 | /// |
---|
1780 | /// Constructor for creating in-degree map. |
---|
1781 | explicit InDegMap(const Graph& _graph) : graph(_graph), deg(_graph) { |
---|
1782 | Parent::attach(graph.getNotifier(typename _Graph::Edge())); |
---|
1783 | |
---|
1784 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1785 | deg[it] = countInEdges(graph, it); |
---|
1786 | } |
---|
1787 | } |
---|
1788 | |
---|
1789 | /// Gives back the in-degree of a Node. |
---|
1790 | int operator[](const Key& key) const { |
---|
1791 | return deg[key]; |
---|
1792 | } |
---|
1793 | |
---|
1794 | protected: |
---|
1795 | |
---|
1796 | typedef typename Graph::Edge Edge; |
---|
1797 | |
---|
1798 | virtual void add(const Edge& edge) { |
---|
1799 | ++deg[graph.target(edge)]; |
---|
1800 | } |
---|
1801 | |
---|
1802 | virtual void add(const std::vector<Edge>& edges) { |
---|
1803 | for (int i = 0; i < (int)edges.size(); ++i) { |
---|
1804 | ++deg[graph.target(edges[i])]; |
---|
1805 | } |
---|
1806 | } |
---|
1807 | |
---|
1808 | virtual void erase(const Edge& edge) { |
---|
1809 | --deg[graph.target(edge)]; |
---|
1810 | } |
---|
1811 | |
---|
1812 | virtual void erase(const std::vector<Edge>& edges) { |
---|
1813 | for (int i = 0; i < (int)edges.size(); ++i) { |
---|
1814 | --deg[graph.target(edges[i])]; |
---|
1815 | } |
---|
1816 | } |
---|
1817 | |
---|
1818 | virtual void build() { |
---|
1819 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1820 | deg[it] = countInEdges(graph, it); |
---|
1821 | } |
---|
1822 | } |
---|
1823 | |
---|
1824 | virtual void clear() { |
---|
1825 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1826 | deg[it] = 0; |
---|
1827 | } |
---|
1828 | } |
---|
1829 | private: |
---|
1830 | |
---|
1831 | const _Graph& graph; |
---|
1832 | AutoNodeMap deg; |
---|
1833 | }; |
---|
1834 | |
---|
1835 | /// \brief Map of the node out-degrees. |
---|
1836 | /// |
---|
1837 | /// This map returns the out-degree of a node. Once it is constructed, |
---|
1838 | /// the degrees are stored in a standard NodeMap, so each query is done |
---|
1839 | /// in constant time. On the other hand, the values are updated automatically |
---|
1840 | /// whenever the graph changes. |
---|
1841 | /// |
---|
1842 | /// \warning Besides addNode() and addEdge(), a graph structure may provide |
---|
1843 | /// alternative ways to modify the graph. The correct behavior of OutDegMap |
---|
1844 | /// is not guarantied if these additional features are used. For example |
---|
1845 | /// the functions \ref ListGraph::changeSource() "changeSource()", |
---|
1846 | /// \ref ListGraph::changeTarget() "changeTarget()" and |
---|
1847 | /// \ref ListGraph::reverseEdge() "reverseEdge()" |
---|
1848 | /// of \ref ListGraph will \e not update the degree values correctly. |
---|
1849 | /// |
---|
1850 | /// \sa InDegMap |
---|
1851 | |
---|
1852 | template <typename _Graph> |
---|
1853 | class OutDegMap |
---|
1854 | : protected ItemSetTraits<_Graph, typename _Graph::Edge> |
---|
1855 | ::ItemNotifier::ObserverBase { |
---|
1856 | |
---|
1857 | public: |
---|
1858 | |
---|
1859 | typedef typename ItemSetTraits<_Graph, typename _Graph::Edge> |
---|
1860 | ::ItemNotifier::ObserverBase Parent; |
---|
1861 | |
---|
1862 | typedef _Graph Graph; |
---|
1863 | typedef int Value; |
---|
1864 | typedef typename Graph::Node Key; |
---|
1865 | |
---|
1866 | private: |
---|
1867 | |
---|
1868 | class AutoNodeMap : public DefaultMap<_Graph, Key, int> { |
---|
1869 | public: |
---|
1870 | |
---|
1871 | typedef DefaultMap<_Graph, Key, int> Parent; |
---|
1872 | typedef typename Parent::Graph Graph; |
---|
1873 | |
---|
1874 | AutoNodeMap(const Graph& graph) : Parent(graph, 0) {} |
---|
1875 | |
---|
1876 | virtual void add(const Key& key) { |
---|
1877 | Parent::add(key); |
---|
1878 | Parent::set(key, 0); |
---|
1879 | } |
---|
1880 | virtual void add(const std::vector<Key>& keys) { |
---|
1881 | Parent::add(keys); |
---|
1882 | for (int i = 0; i < (int)keys.size(); ++i) { |
---|
1883 | Parent::set(keys[i], 0); |
---|
1884 | } |
---|
1885 | } |
---|
1886 | }; |
---|
1887 | |
---|
1888 | public: |
---|
1889 | |
---|
1890 | /// \brief Constructor. |
---|
1891 | /// |
---|
1892 | /// Constructor for creating out-degree map. |
---|
1893 | explicit OutDegMap(const Graph& _graph) : graph(_graph), deg(_graph) { |
---|
1894 | Parent::attach(graph.getNotifier(typename _Graph::Edge())); |
---|
1895 | |
---|
1896 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1897 | deg[it] = countOutEdges(graph, it); |
---|
1898 | } |
---|
1899 | } |
---|
1900 | |
---|
1901 | /// Gives back the out-degree of a Node. |
---|
1902 | int operator[](const Key& key) const { |
---|
1903 | return deg[key]; |
---|
1904 | } |
---|
1905 | |
---|
1906 | protected: |
---|
1907 | |
---|
1908 | typedef typename Graph::Edge Edge; |
---|
1909 | |
---|
1910 | virtual void add(const Edge& edge) { |
---|
1911 | ++deg[graph.source(edge)]; |
---|
1912 | } |
---|
1913 | |
---|
1914 | virtual void add(const std::vector<Edge>& edges) { |
---|
1915 | for (int i = 0; i < (int)edges.size(); ++i) { |
---|
1916 | ++deg[graph.source(edges[i])]; |
---|
1917 | } |
---|
1918 | } |
---|
1919 | |
---|
1920 | virtual void erase(const Edge& edge) { |
---|
1921 | --deg[graph.source(edge)]; |
---|
1922 | } |
---|
1923 | |
---|
1924 | virtual void erase(const std::vector<Edge>& edges) { |
---|
1925 | for (int i = 0; i < (int)edges.size(); ++i) { |
---|
1926 | --deg[graph.source(edges[i])]; |
---|
1927 | } |
---|
1928 | } |
---|
1929 | |
---|
1930 | virtual void build() { |
---|
1931 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1932 | deg[it] = countOutEdges(graph, it); |
---|
1933 | } |
---|
1934 | } |
---|
1935 | |
---|
1936 | virtual void clear() { |
---|
1937 | for(typename _Graph::NodeIt it(graph); it != INVALID; ++it) { |
---|
1938 | deg[it] = 0; |
---|
1939 | } |
---|
1940 | } |
---|
1941 | private: |
---|
1942 | |
---|
1943 | const _Graph& graph; |
---|
1944 | AutoNodeMap deg; |
---|
1945 | }; |
---|
1946 | |
---|
1947 | |
---|
1948 | ///Fast edge look up between given endpoints. |
---|
1949 | |
---|
1950 | ///\ingroup gutils |
---|
1951 | ///Using this class, you can find an edge in a graph from a given |
---|
1952 | ///source to a given target in time <em>O(log d)</em>, |
---|
1953 | ///where <em>d</em> is the out-degree of the source node. |
---|
1954 | /// |
---|
1955 | ///It is not possible to find \e all parallel edges between two nodes. |
---|
1956 | ///Use \ref AllEdgeLookUp for this purpose. |
---|
1957 | /// |
---|
1958 | ///\warning This class is static, so you should refresh() (or at least |
---|
1959 | ///refresh(Node)) this data structure |
---|
1960 | ///whenever the graph changes. This is a time consuming (superlinearly |
---|
1961 | ///proportional (<em>O(m</em>log<em>m)</em>) to the number of edges). |
---|
1962 | /// |
---|
1963 | ///\param G The type of the underlying graph. |
---|
1964 | /// |
---|
1965 | ///\sa AllEdgeLookUp |
---|
1966 | template<class G> |
---|
1967 | class EdgeLookUp |
---|
1968 | { |
---|
1969 | public: |
---|
1970 | GRAPH_TYPEDEFS(typename G) |
---|
1971 | typedef G Graph; |
---|
1972 | |
---|
1973 | protected: |
---|
1974 | const Graph &_g; |
---|
1975 | typename Graph::template NodeMap<Edge> _head; |
---|
1976 | typename Graph::template EdgeMap<Edge> _left; |
---|
1977 | typename Graph::template EdgeMap<Edge> _right; |
---|
1978 | |
---|
1979 | class EdgeLess { |
---|
1980 | const Graph &g; |
---|
1981 | public: |
---|
1982 | EdgeLess(const Graph &_g) : g(_g) {} |
---|
1983 | bool operator()(Edge a,Edge b) const |
---|
1984 | { |
---|
1985 | return g.target(a)<g.target(b); |
---|
1986 | } |
---|
1987 | }; |
---|
1988 | |
---|
1989 | public: |
---|
1990 | |
---|
1991 | ///Constructor |
---|
1992 | |
---|
1993 | ///Constructor. |
---|
1994 | /// |
---|
1995 | ///It builds up the search database, which remains valid until the graph |
---|
1996 | ///changes. |
---|
1997 | EdgeLookUp(const Graph &g) :_g(g),_head(g),_left(g),_right(g) {refresh();} |
---|
1998 | |
---|
1999 | private: |
---|
2000 | Edge refresh_rec(std::vector<Edge> &v,int a,int b) |
---|
2001 | { |
---|
2002 | int m=(a+b)/2; |
---|
2003 | Edge me=v[m]; |
---|
2004 | _left[me] = a<m?refresh_rec(v,a,m-1):INVALID; |
---|
2005 | _right[me] = m<b?refresh_rec(v,m+1,b):INVALID; |
---|
2006 | return me; |
---|
2007 | } |
---|
2008 | public: |
---|
2009 | ///Refresh the data structure at a node. |
---|
2010 | |
---|
2011 | ///Build up the search database of node \c n. |
---|
2012 | /// |
---|
2013 | ///It runs in time <em>O(d</em>log<em>d)</em>, where <em>d</em> is |
---|
2014 | ///the number of the outgoing edges of \c n. |
---|
2015 | void refresh(Node n) |
---|
2016 | { |
---|
2017 | std::vector<Edge> v; |
---|
2018 | for(OutEdgeIt e(_g,n);e!=INVALID;++e) v.push_back(e); |
---|
2019 | if(v.size()) { |
---|
2020 | std::sort(v.begin(),v.end(),EdgeLess(_g)); |
---|
2021 | _head[n]=refresh_rec(v,0,v.size()-1); |
---|
2022 | } |
---|
2023 | else _head[n]=INVALID; |
---|
2024 | } |
---|
2025 | ///Refresh the full data structure. |
---|
2026 | |
---|
2027 | ///Build up the full search database. In fact, it simply calls |
---|
2028 | ///\ref refresh(Node) "refresh(n)" for each node \c n. |
---|
2029 | /// |
---|
2030 | ///It runs in time <em>O(m</em>log<em>D)</em>, where <em>m</em> is |
---|
2031 | ///the number of the edges of \c n and <em>D</em> is the maximum |
---|
2032 | ///out-degree of the graph. |
---|
2033 | |
---|
2034 | void refresh() |
---|
2035 | { |
---|
2036 | for(NodeIt n(_g);n!=INVALID;++n) refresh(n); |
---|
2037 | } |
---|
2038 | |
---|
2039 | ///Find an edge between two nodes. |
---|
2040 | |
---|
2041 | ///Find an edge between two nodes in time <em>O(</em>log<em>d)</em>, where |
---|
2042 | /// <em>d</em> is the number of outgoing edges of \c s. |
---|
2043 | ///\param s The source node |
---|
2044 | ///\param t The target node |
---|
2045 | ///\return An edge from \c s to \c t if there exists, |
---|
2046 | ///\ref INVALID otherwise. |
---|
2047 | /// |
---|
2048 | ///\warning If you change the graph, refresh() must be called before using |
---|
2049 | ///this operator. If you change the outgoing edges of |
---|
2050 | ///a single node \c n, then |
---|
2051 | ///\ref refresh(Node) "refresh(n)" is enough. |
---|
2052 | /// |
---|
2053 | Edge operator()(Node s, Node t) const |
---|
2054 | { |
---|
2055 | Edge e; |
---|
2056 | for(e=_head[s]; |
---|
2057 | e!=INVALID&&_g.target(e)!=t; |
---|
2058 | e = t < _g.target(e)?_left[e]:_right[e]) ; |
---|
2059 | return e; |
---|
2060 | } |
---|
2061 | |
---|
2062 | }; |
---|
2063 | |
---|
2064 | ///Fast look up of all edges between given endpoints. |
---|
2065 | |
---|
2066 | ///\ingroup gutils |
---|
2067 | ///This class is the same as \ref EdgeLookUp, with the addition |
---|
2068 | ///that it makes it possible to find all edges between given endpoints. |
---|
2069 | /// |
---|
2070 | ///\warning This class is static, so you should refresh() (or at least |
---|
2071 | ///refresh(Node)) this data structure |
---|
2072 | ///whenever the graph changes. This is a time consuming (superlinearly |
---|
2073 | ///proportional (<em>O(m</em>log<em>m)</em>) to the number of edges). |
---|
2074 | /// |
---|
2075 | ///\param G The type of the underlying graph. |
---|
2076 | /// |
---|
2077 | ///\sa EdgeLookUp |
---|
2078 | template<class G> |
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2079 | class AllEdgeLookUp : public EdgeLookUp<G> |
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2080 | { |
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2081 | using EdgeLookUp<G>::_g; |
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2082 | using EdgeLookUp<G>::_right; |
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2083 | using EdgeLookUp<G>::_left; |
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2084 | using EdgeLookUp<G>::_head; |
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2085 | |
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2086 | GRAPH_TYPEDEFS(typename G) |
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2087 | typedef G Graph; |
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2088 | |
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2089 | typename Graph::template EdgeMap<Edge> _next; |
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2090 | |
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2091 | Edge refreshNext(Edge head,Edge next=INVALID) |
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2092 | { |
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2093 | if(head==INVALID) return next; |
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2094 | else { |
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2095 | next=refreshNext(_right[head],next); |
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2096 | // _next[head]=next; |
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2097 | _next[head]=( next!=INVALID && _g.target(next)==_g.target(head)) |
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2098 | ? next : INVALID; |
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2099 | return refreshNext(_left[head],head); |
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2100 | } |
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2101 | } |
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2102 | |
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2103 | void refreshNext() |
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2104 | { |
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2105 | for(NodeIt n(_g);n!=INVALID;++n) refreshNext(_head[n]); |
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2106 | } |
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2107 | |
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2108 | public: |
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2109 | ///Constructor |
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2110 | |
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2111 | ///Constructor. |
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2112 | /// |
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2113 | ///It builds up the search database, which remains valid until the graph |
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2114 | ///changes. |
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2115 | AllEdgeLookUp(const Graph &g) : EdgeLookUp<G>(g), _next(g) {refreshNext();} |
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2116 | |
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2117 | ///Refresh the data structure at a node. |
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2118 | |
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2119 | ///Build up the search database of node \c n. |
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2120 | /// |
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2121 | ///It runs in time <em>O(d</em>log<em>d)</em>, where <em>d</em> is |
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2122 | ///the number of the outgoing edges of \c n. |
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2123 | |
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2124 | void refresh(Node n) |
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2125 | { |
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2126 | EdgeLookUp<G>::refresh(n); |
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2127 | refreshNext(_head[n]); |
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2128 | } |
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2129 | |
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2130 | ///Refresh the full data structure. |
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2131 | |
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2132 | ///Build up the full search database. In fact, it simply calls |
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2133 | ///\ref refresh(Node) "refresh(n)" for each node \c n. |
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2134 | /// |
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2135 | ///It runs in time <em>O(m</em>log<em>D)</em>, where <em>m</em> is |
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2136 | ///the number of the edges of \c n and <em>D</em> is the maximum |
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2137 | ///out-degree of the graph. |
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2138 | |
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2139 | void refresh() |
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2140 | { |
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2141 | for(NodeIt n(_g);n!=INVALID;++n) refresh(_head[n]); |
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2142 | } |
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2143 | |
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2144 | ///Find an edge between two nodes. |
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2145 | |
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2146 | ///Find an edge between two nodes. |
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2147 | ///\param s The source node |
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2148 | ///\param t The target node |
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2149 | ///\param prev The previous edge between \c s and \c t. It it is INVALID or |
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2150 | ///not given, the operator finds the first appropriate edge. |
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2151 | ///\return An edge from \c s to \c t after \prev or |
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2152 | ///\ref INVALID if there is no more. |
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2153 | /// |
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2154 | ///For example, you can count the number of edges from \c u to \c v in the |
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2155 | ///following way. |
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2156 | ///\code |
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2157 | ///AllEdgeLookUp<ListGraph> ae(g); |
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2158 | ///... |
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2159 | ///int n=0; |
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2160 | ///for(Edge e=ae(u,v);e!=INVALID;e=ae(u,v,e)) n++; |
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2161 | ///\endcode |
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2162 | /// |
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2163 | ///Finding the first edge take <em>O(</em>log<em>d)</em> time, where |
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2164 | /// <em>d</em> is the number of outgoing edges of \c s. Then, the |
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2165 | ///consecutive edges are found in constant time. |
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2166 | /// |
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2167 | ///\warning If you change the graph, refresh() must be called before using |
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2168 | ///this operator. If you change the outgoing edges of |
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2169 | ///a single node \c n, then |
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2170 | ///\ref refresh(Node) "refresh(n)" is enough. |
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2171 | /// |
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2172 | #ifdef DOXYGEN |
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2173 | Edge operator()(Node s, Node t, Edge prev=INVALID) const {} |
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2174 | #else |
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2175 | using EdgeLookUp<G>::operator() ; |
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2176 | Edge operator()(Node s, Node t, Edge prev) const |
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2177 | { |
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2178 | return prev==INVALID?(*this)(s,t):_next[prev]; |
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2179 | } |
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2180 | #endif |
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2181 | |
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2182 | }; |
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2183 | |
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2184 | /// @} |
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2185 | |
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2186 | } //END OF NAMESPACE LEMON |
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2187 | |
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2188 | #endif |
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