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_ADAPTOR_H |
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20 | #define LEMON_GRAPH_ADAPTOR_H |
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21 | |
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22 | ///\ingroup graph_adaptors |
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23 | ///\file |
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24 | ///\brief Several graph adaptors. |
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25 | /// |
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26 | ///This file contains several useful graph adaptor functions. |
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27 | /// |
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28 | ///\author Marton Makai and Balazs Dezso |
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29 | |
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30 | #include <lemon/bits/invalid.h> |
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31 | #include <lemon/maps.h> |
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32 | |
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33 | #include <lemon/bits/base_extender.h> |
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34 | #include <lemon/bits/graph_adaptor_extender.h> |
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35 | #include <lemon/bits/graph_extender.h> |
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36 | |
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37 | #include <lemon/tolerance.h> |
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38 | |
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39 | #include <iostream> |
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40 | |
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41 | namespace lemon { |
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42 | |
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43 | ///\brief Base type for the Graph Adaptors |
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44 | ///\ingroup graph_adaptors |
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45 | /// |
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46 | ///Base type for the Graph Adaptors |
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47 | /// |
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48 | ///This is the base type for most of LEMON graph adaptors. |
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49 | ///This class implements a trivial graph adaptor i.e. it only wraps the |
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50 | ///functions and types of the graph. The purpose of this class is to |
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51 | ///make easier implementing graph adaptors. E.g. if an adaptor is |
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52 | ///considered which differs from the wrapped graph only in some of its |
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53 | ///functions or types, then it can be derived from GraphAdaptor, |
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54 | ///and only the |
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55 | ///differences should be implemented. |
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56 | /// |
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57 | ///author Marton Makai |
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58 | template<typename _Graph> |
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59 | class GraphAdaptorBase { |
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60 | public: |
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61 | typedef _Graph Graph; |
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62 | typedef GraphAdaptorBase Adaptor; |
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63 | typedef Graph ParentGraph; |
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64 | |
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65 | protected: |
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66 | Graph* graph; |
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67 | GraphAdaptorBase() : graph(0) { } |
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68 | void setGraph(Graph& _graph) { graph=&_graph; } |
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69 | |
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70 | public: |
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71 | GraphAdaptorBase(Graph& _graph) : graph(&_graph) { } |
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72 | |
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73 | typedef typename Graph::Node Node; |
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74 | typedef typename Graph::Edge Edge; |
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75 | |
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76 | void first(Node& i) const { graph->first(i); } |
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77 | void first(Edge& i) const { graph->first(i); } |
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78 | void firstIn(Edge& i, const Node& n) const { graph->firstIn(i, n); } |
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79 | void firstOut(Edge& i, const Node& n ) const { graph->firstOut(i, n); } |
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80 | |
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81 | void next(Node& i) const { graph->next(i); } |
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82 | void next(Edge& i) const { graph->next(i); } |
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83 | void nextIn(Edge& i) const { graph->nextIn(i); } |
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84 | void nextOut(Edge& i) const { graph->nextOut(i); } |
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85 | |
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86 | Node source(const Edge& e) const { return graph->source(e); } |
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87 | Node target(const Edge& e) const { return graph->target(e); } |
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88 | |
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89 | typedef NodeNumTagIndicator<Graph> NodeNumTag; |
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90 | int nodeNum() const { return graph->nodeNum(); } |
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91 | |
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92 | typedef EdgeNumTagIndicator<Graph> EdgeNumTag; |
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93 | int edgeNum() const { return graph->edgeNum(); } |
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94 | |
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95 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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96 | Edge findEdge(const Node& source, const Node& target, |
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97 | const Edge& prev = INVALID) { |
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98 | return graph->findEdge(source, target, prev); |
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99 | } |
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100 | |
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101 | Node addNode() const { |
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102 | return Node(graph->addNode()); |
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103 | } |
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104 | |
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105 | Edge addEdge(const Node& source, const Node& target) const { |
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106 | return Edge(graph->addEdge(source, target)); |
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107 | } |
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108 | |
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109 | void erase(const Node& i) const { graph->erase(i); } |
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110 | void erase(const Edge& i) const { graph->erase(i); } |
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111 | |
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112 | void clear() const { graph->clear(); } |
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113 | |
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114 | int id(const Node& v) const { return graph->id(v); } |
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115 | int id(const Edge& e) const { return graph->id(e); } |
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116 | |
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117 | Node fromNodeId(int id) const { |
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118 | return graph->fromNodeId(id); |
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119 | } |
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120 | |
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121 | Edge fromEdgeId(int id) const { |
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122 | return graph->fromEdgeId(id); |
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123 | } |
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124 | |
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125 | int maxNodeId() const { |
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126 | return graph->maxNodeId(); |
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127 | } |
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128 | |
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129 | int maxEdgeId() const { |
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130 | return graph->maxEdgeId(); |
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131 | } |
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132 | |
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133 | typedef typename ItemSetTraits<Graph, Node>::ItemNotifier NodeNotifier; |
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134 | |
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135 | NodeNotifier& getNotifier(Node) const { |
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136 | return graph->getNotifier(Node()); |
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137 | } |
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138 | |
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139 | typedef typename ItemSetTraits<Graph, Edge>::ItemNotifier EdgeNotifier; |
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140 | |
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141 | EdgeNotifier& getNotifier(Edge) const { |
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142 | return graph->getNotifier(Edge()); |
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143 | } |
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144 | |
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145 | template <typename _Value> |
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146 | class NodeMap : public Graph::template NodeMap<_Value> { |
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147 | public: |
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148 | |
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149 | typedef typename Graph::template NodeMap<_Value> Parent; |
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150 | |
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151 | explicit NodeMap(const Adaptor& ga) |
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152 | : Parent(*ga.graph) {} |
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153 | |
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154 | NodeMap(const Adaptor& ga, const _Value& value) |
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155 | : Parent(*ga.graph, value) { } |
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156 | |
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157 | NodeMap& operator=(const NodeMap& cmap) { |
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158 | return operator=<NodeMap>(cmap); |
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159 | } |
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160 | |
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161 | template <typename CMap> |
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162 | NodeMap& operator=(const CMap& cmap) { |
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163 | Parent::operator=(cmap); |
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164 | return *this; |
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165 | } |
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166 | |
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167 | }; |
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168 | |
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169 | template <typename _Value> |
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170 | class EdgeMap : public Graph::template EdgeMap<_Value> { |
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171 | public: |
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172 | |
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173 | typedef typename Graph::template EdgeMap<_Value> Parent; |
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174 | |
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175 | explicit EdgeMap(const Adaptor& ga) |
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176 | : Parent(*ga.graph) {} |
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177 | |
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178 | EdgeMap(const Adaptor& ga, const _Value& value) |
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179 | : Parent(*ga.graph, value) {} |
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180 | |
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181 | EdgeMap& operator=(const EdgeMap& cmap) { |
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182 | return operator=<EdgeMap>(cmap); |
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183 | } |
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184 | |
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185 | template <typename CMap> |
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186 | EdgeMap& operator=(const CMap& cmap) { |
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187 | Parent::operator=(cmap); |
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188 | return *this; |
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189 | } |
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190 | |
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191 | }; |
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192 | |
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193 | }; |
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194 | |
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195 | template <typename _Graph> |
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196 | class GraphAdaptor : |
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197 | public GraphAdaptorExtender<GraphAdaptorBase<_Graph> > { |
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198 | public: |
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199 | typedef _Graph Graph; |
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200 | typedef GraphAdaptorExtender<GraphAdaptorBase<_Graph> > Parent; |
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201 | protected: |
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202 | GraphAdaptor() : Parent() { } |
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203 | |
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204 | public: |
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205 | explicit GraphAdaptor(Graph& _graph) { setGraph(_graph); } |
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206 | }; |
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207 | |
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208 | /// \brief Just gives back a graph adaptor |
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209 | /// |
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210 | /// Just gives back a graph adaptor which |
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211 | /// should be provide original graph |
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212 | template<typename Graph> |
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213 | GraphAdaptor<const Graph> |
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214 | graphAdaptor(const Graph& graph) { |
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215 | return GraphAdaptor<const Graph>(graph); |
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216 | } |
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217 | |
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218 | |
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219 | template <typename _Graph> |
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220 | class RevGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
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221 | public: |
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222 | typedef _Graph Graph; |
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223 | typedef GraphAdaptorBase<_Graph> Parent; |
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224 | protected: |
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225 | RevGraphAdaptorBase() : Parent() { } |
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226 | public: |
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227 | typedef typename Parent::Node Node; |
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228 | typedef typename Parent::Edge Edge; |
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229 | |
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230 | void firstIn(Edge& i, const Node& n) const { Parent::firstOut(i, n); } |
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231 | void firstOut(Edge& i, const Node& n ) const { Parent::firstIn(i, n); } |
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232 | |
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233 | void nextIn(Edge& i) const { Parent::nextOut(i); } |
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234 | void nextOut(Edge& i) const { Parent::nextIn(i); } |
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235 | |
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236 | Node source(const Edge& e) const { return Parent::target(e); } |
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237 | Node target(const Edge& e) const { return Parent::source(e); } |
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238 | |
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239 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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240 | Edge findEdge(const Node& source, const Node& target, |
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241 | const Edge& prev = INVALID) { |
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242 | return Parent::findEdge(target, source, prev); |
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243 | } |
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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 A graph adaptor which reverses the orientation of the edges. |
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249 | ///\ingroup graph_adaptors |
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250 | /// |
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251 | /// If \c g is defined as |
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252 | ///\code |
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253 | /// ListGraph g; |
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254 | ///\endcode |
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255 | /// then |
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256 | ///\code |
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257 | /// RevGraphAdaptor<ListGraph> ga(g); |
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258 | ///\endcode |
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259 | ///implements the graph obtained from \c g by |
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260 | /// reversing the orientation of its edges. |
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261 | |
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262 | template<typename _Graph> |
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263 | class RevGraphAdaptor : |
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264 | public GraphAdaptorExtender<RevGraphAdaptorBase<_Graph> > { |
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265 | public: |
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266 | typedef _Graph Graph; |
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267 | typedef GraphAdaptorExtender< |
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268 | RevGraphAdaptorBase<_Graph> > Parent; |
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269 | protected: |
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270 | RevGraphAdaptor() { } |
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271 | public: |
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272 | explicit RevGraphAdaptor(_Graph& _graph) { setGraph(_graph); } |
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273 | }; |
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274 | |
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275 | /// \brief Just gives back a reverse graph adaptor |
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276 | /// |
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277 | /// Just gives back a reverse graph adaptor |
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278 | template<typename Graph> |
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279 | RevGraphAdaptor<const Graph> |
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280 | revGraphAdaptor(const Graph& graph) { |
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281 | return RevGraphAdaptor<const Graph>(graph); |
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282 | } |
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283 | |
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284 | template <typename _Graph, typename NodeFilterMap, |
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285 | typename EdgeFilterMap, bool checked = true> |
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286 | class SubGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
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287 | public: |
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288 | typedef _Graph Graph; |
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289 | typedef SubGraphAdaptorBase Adaptor; |
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290 | typedef GraphAdaptorBase<_Graph> Parent; |
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291 | protected: |
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292 | NodeFilterMap* node_filter_map; |
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293 | EdgeFilterMap* edge_filter_map; |
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294 | SubGraphAdaptorBase() : Parent(), |
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295 | node_filter_map(0), edge_filter_map(0) { } |
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296 | |
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297 | void setNodeFilterMap(NodeFilterMap& _node_filter_map) { |
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298 | node_filter_map=&_node_filter_map; |
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299 | } |
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300 | void setEdgeFilterMap(EdgeFilterMap& _edge_filter_map) { |
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301 | edge_filter_map=&_edge_filter_map; |
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302 | } |
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303 | |
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304 | public: |
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305 | |
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306 | typedef typename Parent::Node Node; |
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307 | typedef typename Parent::Edge Edge; |
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308 | |
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309 | void first(Node& i) const { |
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310 | Parent::first(i); |
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311 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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312 | } |
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313 | |
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314 | void first(Edge& i) const { |
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315 | Parent::first(i); |
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316 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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317 | || !(*node_filter_map)[Parent::source(i)] |
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318 | || !(*node_filter_map)[Parent::target(i)])) Parent::next(i); |
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319 | } |
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320 | |
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321 | void firstIn(Edge& i, const Node& n) const { |
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322 | Parent::firstIn(i, n); |
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323 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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324 | || !(*node_filter_map)[Parent::source(i)])) Parent::nextIn(i); |
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325 | } |
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326 | |
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327 | void firstOut(Edge& i, const Node& n) const { |
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328 | Parent::firstOut(i, n); |
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329 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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330 | || !(*node_filter_map)[Parent::target(i)])) Parent::nextOut(i); |
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331 | } |
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332 | |
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333 | void next(Node& i) const { |
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334 | Parent::next(i); |
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335 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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336 | } |
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337 | |
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338 | void next(Edge& i) const { |
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339 | Parent::next(i); |
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340 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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341 | || !(*node_filter_map)[Parent::source(i)] |
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342 | || !(*node_filter_map)[Parent::target(i)])) Parent::next(i); |
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343 | } |
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344 | |
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345 | void nextIn(Edge& i) const { |
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346 | Parent::nextIn(i); |
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347 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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348 | || !(*node_filter_map)[Parent::source(i)])) Parent::nextIn(i); |
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349 | } |
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350 | |
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351 | void nextOut(Edge& i) const { |
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352 | Parent::nextOut(i); |
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353 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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354 | || !(*node_filter_map)[Parent::target(i)])) Parent::nextOut(i); |
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355 | } |
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356 | |
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357 | ///\e |
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358 | |
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359 | /// This function hides \c n in the graph, i.e. the iteration |
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360 | /// jumps over it. This is done by simply setting the value of \c n |
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361 | /// to be false in the corresponding node-map. |
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362 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
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363 | |
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364 | ///\e |
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365 | |
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366 | /// This function hides \c e in the graph, i.e. the iteration |
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367 | /// jumps over it. This is done by simply setting the value of \c e |
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368 | /// to be false in the corresponding edge-map. |
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369 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
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370 | |
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371 | ///\e |
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372 | |
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373 | /// The value of \c n is set to be true in the node-map which stores |
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374 | /// hide information. If \c n was hidden previuosly, then it is shown |
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375 | /// again |
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376 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
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377 | |
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378 | ///\e |
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379 | |
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380 | /// The value of \c e is set to be true in the edge-map which stores |
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381 | /// hide information. If \c e was hidden previuosly, then it is shown |
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382 | /// again |
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383 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
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384 | |
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385 | /// Returns true if \c n is hidden. |
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386 | |
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387 | ///\e |
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388 | /// |
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389 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
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390 | |
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391 | /// Returns true if \c n is hidden. |
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392 | |
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393 | ///\e |
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394 | /// |
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395 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
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396 | |
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397 | typedef False NodeNumTag; |
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398 | typedef False EdgeNumTag; |
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399 | |
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400 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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401 | Edge findEdge(const Node& source, const Node& target, |
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402 | const Edge& prev = INVALID) { |
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403 | if (!(*node_filter_map)[source] || !(*node_filter_map)[target]) { |
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404 | return INVALID; |
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405 | } |
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406 | Edge edge = Parent::findEdge(source, target, prev); |
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407 | while (edge != INVALID && !(*edge_filter_map)[edge]) { |
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408 | edge = Parent::findEdge(source, target, edge); |
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409 | } |
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410 | return edge; |
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411 | } |
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412 | |
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413 | template <typename _Value> |
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414 | class NodeMap |
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415 | : public SubMapExtender<Adaptor, |
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416 | typename Parent::template NodeMap<_Value> > |
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417 | { |
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418 | public: |
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419 | typedef Adaptor Graph; |
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420 | typedef SubMapExtender<Adaptor, typename Parent:: |
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421 | template NodeMap<_Value> > Parent; |
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422 | |
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423 | NodeMap(const Graph& graph) |
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424 | : Parent(graph) {} |
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425 | NodeMap(const Graph& graph, const _Value& value) |
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426 | : Parent(graph, value) {} |
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427 | |
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428 | NodeMap& operator=(const NodeMap& cmap) { |
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429 | return operator=<NodeMap>(cmap); |
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430 | } |
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431 | |
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432 | template <typename CMap> |
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433 | NodeMap& operator=(const CMap& cmap) { |
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434 | Parent::operator=(cmap); |
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435 | return *this; |
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436 | } |
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437 | }; |
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438 | |
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439 | template <typename _Value> |
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440 | class EdgeMap |
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441 | : public SubMapExtender<Adaptor, |
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442 | typename Parent::template EdgeMap<_Value> > |
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443 | { |
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444 | public: |
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445 | typedef Adaptor Graph; |
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446 | typedef SubMapExtender<Adaptor, typename Parent:: |
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447 | template EdgeMap<_Value> > Parent; |
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448 | |
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449 | EdgeMap(const Graph& graph) |
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450 | : Parent(graph) {} |
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451 | EdgeMap(const Graph& graph, const _Value& value) |
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452 | : Parent(graph, value) {} |
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453 | |
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454 | EdgeMap& operator=(const EdgeMap& cmap) { |
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455 | return operator=<EdgeMap>(cmap); |
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456 | } |
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457 | |
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458 | template <typename CMap> |
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459 | EdgeMap& operator=(const CMap& cmap) { |
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460 | Parent::operator=(cmap); |
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461 | return *this; |
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462 | } |
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463 | }; |
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464 | |
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465 | }; |
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466 | |
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467 | template <typename _Graph, typename NodeFilterMap, typename EdgeFilterMap> |
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468 | class SubGraphAdaptorBase<_Graph, NodeFilterMap, EdgeFilterMap, false> |
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469 | : public GraphAdaptorBase<_Graph> { |
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470 | public: |
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471 | typedef _Graph Graph; |
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472 | typedef SubGraphAdaptorBase Adaptor; |
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473 | typedef GraphAdaptorBase<_Graph> Parent; |
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474 | protected: |
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475 | NodeFilterMap* node_filter_map; |
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476 | EdgeFilterMap* edge_filter_map; |
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477 | SubGraphAdaptorBase() : Parent(), |
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478 | node_filter_map(0), edge_filter_map(0) { } |
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479 | |
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480 | void setNodeFilterMap(NodeFilterMap& _node_filter_map) { |
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481 | node_filter_map=&_node_filter_map; |
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482 | } |
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483 | void setEdgeFilterMap(EdgeFilterMap& _edge_filter_map) { |
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484 | edge_filter_map=&_edge_filter_map; |
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485 | } |
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486 | |
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487 | public: |
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488 | |
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489 | typedef typename Parent::Node Node; |
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490 | typedef typename Parent::Edge Edge; |
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491 | |
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492 | void first(Node& i) const { |
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493 | Parent::first(i); |
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494 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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495 | } |
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496 | |
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497 | void first(Edge& i) const { |
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498 | Parent::first(i); |
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499 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::next(i); |
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500 | } |
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501 | |
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502 | void firstIn(Edge& i, const Node& n) const { |
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503 | Parent::firstIn(i, n); |
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504 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextIn(i); |
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505 | } |
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506 | |
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507 | void firstOut(Edge& i, const Node& n) const { |
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508 | Parent::firstOut(i, n); |
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509 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextOut(i); |
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510 | } |
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511 | |
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512 | void next(Node& i) const { |
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513 | Parent::next(i); |
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514 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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515 | } |
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516 | void next(Edge& i) const { |
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517 | Parent::next(i); |
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518 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::next(i); |
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519 | } |
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520 | void nextIn(Edge& i) const { |
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521 | Parent::nextIn(i); |
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522 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextIn(i); |
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523 | } |
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524 | |
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525 | void nextOut(Edge& i) const { |
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526 | Parent::nextOut(i); |
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527 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextOut(i); |
---|
528 | } |
---|
529 | |
---|
530 | ///\e |
---|
531 | |
---|
532 | /// This function hides \c n in the graph, i.e. the iteration |
---|
533 | /// jumps over it. This is done by simply setting the value of \c n |
---|
534 | /// to be false in the corresponding node-map. |
---|
535 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
---|
536 | |
---|
537 | ///\e |
---|
538 | |
---|
539 | /// This function hides \c e in the graph, i.e. the iteration |
---|
540 | /// jumps over it. This is done by simply setting the value of \c e |
---|
541 | /// to be false in the corresponding edge-map. |
---|
542 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
---|
543 | |
---|
544 | ///\e |
---|
545 | |
---|
546 | /// The value of \c n is set to be true in the node-map which stores |
---|
547 | /// hide information. If \c n was hidden previuosly, then it is shown |
---|
548 | /// again |
---|
549 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
---|
550 | |
---|
551 | ///\e |
---|
552 | |
---|
553 | /// The value of \c e is set to be true in the edge-map which stores |
---|
554 | /// hide information. If \c e was hidden previuosly, then it is shown |
---|
555 | /// again |
---|
556 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
---|
557 | |
---|
558 | /// Returns true if \c n is hidden. |
---|
559 | |
---|
560 | ///\e |
---|
561 | /// |
---|
562 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
---|
563 | |
---|
564 | /// Returns true if \c n is hidden. |
---|
565 | |
---|
566 | ///\e |
---|
567 | /// |
---|
568 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
---|
569 | |
---|
570 | typedef False NodeNumTag; |
---|
571 | typedef False EdgeNumTag; |
---|
572 | |
---|
573 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
---|
574 | Edge findEdge(const Node& source, const Node& target, |
---|
575 | const Edge& prev = INVALID) { |
---|
576 | if (!(*node_filter_map)[source] || !(*node_filter_map)[target]) { |
---|
577 | return INVALID; |
---|
578 | } |
---|
579 | Edge edge = Parent::findEdge(source, target, prev); |
---|
580 | while (edge != INVALID && !(*edge_filter_map)[edge]) { |
---|
581 | edge = Parent::findEdge(source, target, edge); |
---|
582 | } |
---|
583 | return edge; |
---|
584 | } |
---|
585 | |
---|
586 | template <typename _Value> |
---|
587 | class NodeMap |
---|
588 | : public SubMapExtender<Adaptor, |
---|
589 | typename Parent::template NodeMap<_Value> > |
---|
590 | { |
---|
591 | public: |
---|
592 | typedef Adaptor Graph; |
---|
593 | typedef SubMapExtender<Adaptor, typename Parent:: |
---|
594 | template NodeMap<_Value> > Parent; |
---|
595 | |
---|
596 | NodeMap(const Graph& graph) |
---|
597 | : Parent(graph) {} |
---|
598 | NodeMap(const Graph& graph, const _Value& value) |
---|
599 | : Parent(graph, value) {} |
---|
600 | |
---|
601 | NodeMap& operator=(const NodeMap& cmap) { |
---|
602 | return operator=<NodeMap>(cmap); |
---|
603 | } |
---|
604 | |
---|
605 | template <typename CMap> |
---|
606 | NodeMap& operator=(const CMap& cmap) { |
---|
607 | Parent::operator=(cmap); |
---|
608 | return *this; |
---|
609 | } |
---|
610 | }; |
---|
611 | |
---|
612 | template <typename _Value> |
---|
613 | class EdgeMap |
---|
614 | : public SubMapExtender<Adaptor, |
---|
615 | typename Parent::template EdgeMap<_Value> > |
---|
616 | { |
---|
617 | public: |
---|
618 | typedef Adaptor Graph; |
---|
619 | typedef SubMapExtender<Adaptor, typename Parent:: |
---|
620 | template EdgeMap<_Value> > Parent; |
---|
621 | |
---|
622 | EdgeMap(const Graph& graph) |
---|
623 | : Parent(graph) {} |
---|
624 | EdgeMap(const Graph& graph, const _Value& value) |
---|
625 | : Parent(graph, value) {} |
---|
626 | |
---|
627 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
628 | return operator=<EdgeMap>(cmap); |
---|
629 | } |
---|
630 | |
---|
631 | template <typename CMap> |
---|
632 | EdgeMap& operator=(const CMap& cmap) { |
---|
633 | Parent::operator=(cmap); |
---|
634 | return *this; |
---|
635 | } |
---|
636 | }; |
---|
637 | |
---|
638 | }; |
---|
639 | |
---|
640 | /// \brief A graph adaptor for hiding nodes and edges from a graph. |
---|
641 | /// \ingroup graph_adaptors |
---|
642 | /// |
---|
643 | /// SubGraphAdaptor shows the graph with filtered node-set and |
---|
644 | /// edge-set. If the \c checked parameter is true then it filters the edgeset |
---|
645 | /// to do not get invalid edges without source or target. |
---|
646 | /// Let \f$ G=(V, A) \f$ be a directed graph |
---|
647 | /// and suppose that the graph instance \c g of type ListGraph |
---|
648 | /// implements \f$ G \f$. |
---|
649 | /// Let moreover \f$ b_V \f$ and \f$ b_A \f$ be bool-valued functions resp. |
---|
650 | /// on the node-set and edge-set. |
---|
651 | /// SubGraphAdaptor<...>::NodeIt iterates |
---|
652 | /// on the node-set \f$ \{v\in V : b_V(v)=true\} \f$ and |
---|
653 | /// SubGraphAdaptor<...>::EdgeIt iterates |
---|
654 | /// on the edge-set \f$ \{e\in A : b_A(e)=true\} \f$. Similarly, |
---|
655 | /// SubGraphAdaptor<...>::OutEdgeIt and |
---|
656 | /// SubGraphAdaptor<...>::InEdgeIt iterates |
---|
657 | /// only on edges leaving and entering a specific node which have true value. |
---|
658 | /// |
---|
659 | /// If the \c checked template parameter is false then we have to note that |
---|
660 | /// the node-iterator cares only the filter on the node-set, and the |
---|
661 | /// edge-iterator cares only the filter on the edge-set. |
---|
662 | /// This way the edge-map |
---|
663 | /// should filter all edges which's source or target is filtered by the |
---|
664 | /// node-filter. |
---|
665 | ///\code |
---|
666 | /// typedef ListGraph Graph; |
---|
667 | /// Graph g; |
---|
668 | /// typedef Graph::Node Node; |
---|
669 | /// typedef Graph::Edge Edge; |
---|
670 | /// Node u=g.addNode(); //node of id 0 |
---|
671 | /// Node v=g.addNode(); //node of id 1 |
---|
672 | /// Node e=g.addEdge(u, v); //edge of id 0 |
---|
673 | /// Node f=g.addEdge(v, u); //edge of id 1 |
---|
674 | /// Graph::NodeMap<bool> nm(g, true); |
---|
675 | /// nm.set(u, false); |
---|
676 | /// Graph::EdgeMap<bool> em(g, true); |
---|
677 | /// em.set(e, false); |
---|
678 | /// typedef SubGraphAdaptor<Graph, Graph::NodeMap<bool>, Graph::EdgeMap<bool> > SubGA; |
---|
679 | /// SubGA ga(g, nm, em); |
---|
680 | /// for (SubGA::NodeIt n(ga); n!=INVALID; ++n) std::cout << g.id(n) << std::endl; |
---|
681 | /// std::cout << ":-)" << std::endl; |
---|
682 | /// for (SubGA::EdgeIt e(ga); e!=INVALID; ++e) std::cout << g.id(e) << std::endl; |
---|
683 | ///\endcode |
---|
684 | /// The output of the above code is the following. |
---|
685 | ///\code |
---|
686 | /// 1 |
---|
687 | /// :-) |
---|
688 | /// 1 |
---|
689 | ///\endcode |
---|
690 | /// Note that \c n is of type \c SubGA::NodeIt, but it can be converted to |
---|
691 | /// \c Graph::Node that is why \c g.id(n) can be applied. |
---|
692 | /// |
---|
693 | /// For other examples see also the documentation of NodeSubGraphAdaptor and |
---|
694 | /// EdgeSubGraphAdaptor. |
---|
695 | /// |
---|
696 | /// \author Marton Makai |
---|
697 | |
---|
698 | template<typename _Graph, typename NodeFilterMap, |
---|
699 | typename EdgeFilterMap, bool checked = true> |
---|
700 | class SubGraphAdaptor : |
---|
701 | public GraphAdaptorExtender< |
---|
702 | SubGraphAdaptorBase<_Graph, NodeFilterMap, EdgeFilterMap, checked> > { |
---|
703 | public: |
---|
704 | typedef _Graph Graph; |
---|
705 | typedef GraphAdaptorExtender< SubGraphAdaptorBase<_Graph, NodeFilterMap, |
---|
706 | EdgeFilterMap, checked> > |
---|
707 | Parent; |
---|
708 | |
---|
709 | protected: |
---|
710 | SubGraphAdaptor() { } |
---|
711 | public: |
---|
712 | |
---|
713 | SubGraphAdaptor(_Graph& _graph, NodeFilterMap& _node_filter_map, |
---|
714 | EdgeFilterMap& _edge_filter_map) { |
---|
715 | setGraph(_graph); |
---|
716 | setNodeFilterMap(_node_filter_map); |
---|
717 | setEdgeFilterMap(_edge_filter_map); |
---|
718 | } |
---|
719 | |
---|
720 | }; |
---|
721 | |
---|
722 | /// \brief Just gives back a sub graph adaptor |
---|
723 | /// |
---|
724 | /// Just gives back a sub graph adaptor |
---|
725 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
726 | SubGraphAdaptor<const Graph, NodeFilterMap, EdgeFilterMap> |
---|
727 | subGraphAdaptor(const Graph& graph, |
---|
728 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
729 | return SubGraphAdaptor<const Graph, NodeFilterMap, EdgeFilterMap> |
---|
730 | (graph, nfm, efm); |
---|
731 | } |
---|
732 | |
---|
733 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
734 | SubGraphAdaptor<const Graph, const NodeFilterMap, EdgeFilterMap> |
---|
735 | subGraphAdaptor(const Graph& graph, |
---|
736 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
737 | return SubGraphAdaptor<const Graph, const NodeFilterMap, EdgeFilterMap> |
---|
738 | (graph, nfm, efm); |
---|
739 | } |
---|
740 | |
---|
741 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
742 | SubGraphAdaptor<const Graph, NodeFilterMap, const EdgeFilterMap> |
---|
743 | subGraphAdaptor(const Graph& graph, |
---|
744 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
745 | return SubGraphAdaptor<const Graph, NodeFilterMap, const EdgeFilterMap> |
---|
746 | (graph, nfm, efm); |
---|
747 | } |
---|
748 | |
---|
749 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
750 | SubGraphAdaptor<const Graph, const NodeFilterMap, const EdgeFilterMap> |
---|
751 | subGraphAdaptor(const Graph& graph, |
---|
752 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
753 | return SubGraphAdaptor<const Graph, const NodeFilterMap, |
---|
754 | const EdgeFilterMap>(graph, nfm, efm); |
---|
755 | } |
---|
756 | |
---|
757 | |
---|
758 | |
---|
759 | ///\brief An adaptor for hiding nodes from a graph. |
---|
760 | ///\ingroup graph_adaptors |
---|
761 | /// |
---|
762 | ///An adaptor for hiding nodes from a graph. |
---|
763 | ///This adaptor specializes SubGraphAdaptor in the way that only |
---|
764 | ///the node-set |
---|
765 | ///can be filtered. In usual case the checked parameter is true, we get the |
---|
766 | ///induced subgraph. But if the checked parameter is false then we can only |
---|
767 | ///filter only isolated nodes. |
---|
768 | ///\author Marton Makai |
---|
769 | template<typename Graph, typename NodeFilterMap, bool checked = true> |
---|
770 | class NodeSubGraphAdaptor : |
---|
771 | public SubGraphAdaptor<Graph, NodeFilterMap, |
---|
772 | ConstMap<typename Graph::Edge,bool>, checked> { |
---|
773 | public: |
---|
774 | |
---|
775 | typedef SubGraphAdaptor<Graph, NodeFilterMap, |
---|
776 | ConstMap<typename Graph::Edge,bool>, checked > |
---|
777 | Parent; |
---|
778 | |
---|
779 | protected: |
---|
780 | ConstMap<typename Graph::Edge, bool> const_true_map; |
---|
781 | |
---|
782 | NodeSubGraphAdaptor() : const_true_map(true) { |
---|
783 | Parent::setEdgeFilterMap(const_true_map); |
---|
784 | } |
---|
785 | |
---|
786 | public: |
---|
787 | |
---|
788 | NodeSubGraphAdaptor(Graph& _graph, NodeFilterMap& _node_filter_map) : |
---|
789 | Parent(), const_true_map(true) { |
---|
790 | Parent::setGraph(_graph); |
---|
791 | Parent::setNodeFilterMap(_node_filter_map); |
---|
792 | Parent::setEdgeFilterMap(const_true_map); |
---|
793 | } |
---|
794 | |
---|
795 | }; |
---|
796 | |
---|
797 | |
---|
798 | /// \brief Just gives back a node sub graph adaptor |
---|
799 | /// |
---|
800 | /// Just gives back a node sub graph adaptor |
---|
801 | template<typename Graph, typename NodeFilterMap> |
---|
802 | NodeSubGraphAdaptor<const Graph, NodeFilterMap> |
---|
803 | nodeSubGraphAdaptor(const Graph& graph, NodeFilterMap& nfm) { |
---|
804 | return NodeSubGraphAdaptor<const Graph, NodeFilterMap>(graph, nfm); |
---|
805 | } |
---|
806 | |
---|
807 | template<typename Graph, typename NodeFilterMap> |
---|
808 | NodeSubGraphAdaptor<const Graph, const NodeFilterMap> |
---|
809 | nodeSubGraphAdaptor(const Graph& graph, const NodeFilterMap& nfm) { |
---|
810 | return NodeSubGraphAdaptor<const Graph, const NodeFilterMap>(graph, nfm); |
---|
811 | } |
---|
812 | |
---|
813 | ///\brief An adaptor for hiding edges from a graph. |
---|
814 | /// |
---|
815 | ///An adaptor for hiding edges from a graph. |
---|
816 | ///This adaptor specializes SubGraphAdaptor in the way that |
---|
817 | ///only the edge-set |
---|
818 | ///can be filtered. The usefulness of this adaptor is demonstrated in the |
---|
819 | ///problem of searching a maximum number of edge-disjoint shortest paths |
---|
820 | ///between |
---|
821 | ///two nodes \c s and \c t. Shortest here means being shortest w.r.t. |
---|
822 | ///non-negative edge-lengths. Note that |
---|
823 | ///the comprehension of the presented solution |
---|
824 | ///need's some elementary knowledge from combinatorial optimization. |
---|
825 | /// |
---|
826 | ///If a single shortest path is to be |
---|
827 | ///searched between \c s and \c t, then this can be done easily by |
---|
828 | ///applying the Dijkstra algorithm. What happens, if a maximum number of |
---|
829 | ///edge-disjoint shortest paths is to be computed. It can be proved that an |
---|
830 | ///edge can be in a shortest path if and only |
---|
831 | ///if it is tight with respect to |
---|
832 | ///the potential function computed by Dijkstra. |
---|
833 | ///Moreover, any path containing |
---|
834 | ///only such edges is a shortest one. |
---|
835 | ///Thus we have to compute a maximum number |
---|
836 | ///of edge-disjoint paths between \c s and \c t in |
---|
837 | ///the graph which has edge-set |
---|
838 | ///all the tight edges. The computation will be demonstrated |
---|
839 | ///on the following |
---|
840 | ///graph, which is read from the dimacs file \c sub_graph_adaptor_demo.dim. |
---|
841 | ///The full source code is available in \ref sub_graph_adaptor_demo.cc. |
---|
842 | ///If you are interested in more demo programs, you can use |
---|
843 | ///\ref dim_to_dot.cc to generate .dot files from dimacs files. |
---|
844 | ///The .dot file of the following figure was generated by |
---|
845 | ///the demo program \ref dim_to_dot.cc. |
---|
846 | /// |
---|
847 | ///\dot |
---|
848 | ///digraph lemon_dot_example { |
---|
849 | ///node [ shape=ellipse, fontname=Helvetica, fontsize=10 ]; |
---|
850 | ///n0 [ label="0 (s)" ]; |
---|
851 | ///n1 [ label="1" ]; |
---|
852 | ///n2 [ label="2" ]; |
---|
853 | ///n3 [ label="3" ]; |
---|
854 | ///n4 [ label="4" ]; |
---|
855 | ///n5 [ label="5" ]; |
---|
856 | ///n6 [ label="6 (t)" ]; |
---|
857 | ///edge [ shape=ellipse, fontname=Helvetica, fontsize=10 ]; |
---|
858 | ///n5 -> n6 [ label="9, length:4" ]; |
---|
859 | ///n4 -> n6 [ label="8, length:2" ]; |
---|
860 | ///n3 -> n5 [ label="7, length:1" ]; |
---|
861 | ///n2 -> n5 [ label="6, length:3" ]; |
---|
862 | ///n2 -> n6 [ label="5, length:5" ]; |
---|
863 | ///n2 -> n4 [ label="4, length:2" ]; |
---|
864 | ///n1 -> n4 [ label="3, length:3" ]; |
---|
865 | ///n0 -> n3 [ label="2, length:1" ]; |
---|
866 | ///n0 -> n2 [ label="1, length:2" ]; |
---|
867 | ///n0 -> n1 [ label="0, length:3" ]; |
---|
868 | ///} |
---|
869 | ///\enddot |
---|
870 | /// |
---|
871 | ///\code |
---|
872 | ///Graph g; |
---|
873 | ///Node s, t; |
---|
874 | ///LengthMap length(g); |
---|
875 | /// |
---|
876 | ///readDimacs(std::cin, g, length, s, t); |
---|
877 | /// |
---|
878 | ///cout << "edges with lengths (of form id, source--length->target): " << endl; |
---|
879 | ///for(EdgeIt e(g); e!=INVALID; ++e) |
---|
880 | /// cout << g.id(e) << ", " << g.id(g.source(e)) << "--" |
---|
881 | /// << length[e] << "->" << g.id(g.target(e)) << endl; |
---|
882 | /// |
---|
883 | ///cout << "s: " << g.id(s) << " t: " << g.id(t) << endl; |
---|
884 | ///\endcode |
---|
885 | ///Next, the potential function is computed with Dijkstra. |
---|
886 | ///\code |
---|
887 | ///typedef Dijkstra<Graph, LengthMap> Dijkstra; |
---|
888 | ///Dijkstra dijkstra(g, length); |
---|
889 | ///dijkstra.run(s); |
---|
890 | ///\endcode |
---|
891 | ///Next, we consrtruct a map which filters the edge-set to the tight edges. |
---|
892 | ///\code |
---|
893 | ///typedef TightEdgeFilterMap<Graph, const Dijkstra::DistMap, LengthMap> |
---|
894 | /// TightEdgeFilter; |
---|
895 | ///TightEdgeFilter tight_edge_filter(g, dijkstra.distMap(), length); |
---|
896 | /// |
---|
897 | ///typedef EdgeSubGraphAdaptor<Graph, TightEdgeFilter> SubGA; |
---|
898 | ///SubGA ga(g, tight_edge_filter); |
---|
899 | ///\endcode |
---|
900 | ///Then, the maximum nimber of edge-disjoint \c s-\c t paths are computed |
---|
901 | ///with a max flow algorithm Preflow. |
---|
902 | ///\code |
---|
903 | ///ConstMap<Edge, int> const_1_map(1); |
---|
904 | ///Graph::EdgeMap<int> flow(g, 0); |
---|
905 | /// |
---|
906 | ///Preflow<SubGA, int, ConstMap<Edge, int>, Graph::EdgeMap<int> > |
---|
907 | /// preflow(ga, s, t, const_1_map, flow); |
---|
908 | ///preflow.run(); |
---|
909 | ///\endcode |
---|
910 | ///Last, the output is: |
---|
911 | ///\code |
---|
912 | ///cout << "maximum number of edge-disjoint shortest path: " |
---|
913 | /// << preflow.flowValue() << endl; |
---|
914 | ///cout << "edges of the maximum number of edge-disjoint shortest s-t paths: " |
---|
915 | /// << endl; |
---|
916 | ///for(EdgeIt e(g); e!=INVALID; ++e) |
---|
917 | /// if (flow[e]) |
---|
918 | /// cout << " " << g.id(g.source(e)) << "--" |
---|
919 | /// << length[e] << "->" << g.id(g.target(e)) << endl; |
---|
920 | ///\endcode |
---|
921 | ///The program has the following (expected :-)) output: |
---|
922 | ///\code |
---|
923 | ///edges with lengths (of form id, source--length->target): |
---|
924 | /// 9, 5--4->6 |
---|
925 | /// 8, 4--2->6 |
---|
926 | /// 7, 3--1->5 |
---|
927 | /// 6, 2--3->5 |
---|
928 | /// 5, 2--5->6 |
---|
929 | /// 4, 2--2->4 |
---|
930 | /// 3, 1--3->4 |
---|
931 | /// 2, 0--1->3 |
---|
932 | /// 1, 0--2->2 |
---|
933 | /// 0, 0--3->1 |
---|
934 | ///s: 0 t: 6 |
---|
935 | ///maximum number of edge-disjoint shortest path: 2 |
---|
936 | ///edges of the maximum number of edge-disjoint shortest s-t paths: |
---|
937 | /// 9, 5--4->6 |
---|
938 | /// 8, 4--2->6 |
---|
939 | /// 7, 3--1->5 |
---|
940 | /// 4, 2--2->4 |
---|
941 | /// 2, 0--1->3 |
---|
942 | /// 1, 0--2->2 |
---|
943 | ///\endcode |
---|
944 | /// |
---|
945 | ///\author Marton Makai |
---|
946 | template<typename Graph, typename EdgeFilterMap> |
---|
947 | class EdgeSubGraphAdaptor : |
---|
948 | public SubGraphAdaptor<Graph, ConstMap<typename Graph::Node,bool>, |
---|
949 | EdgeFilterMap, false> { |
---|
950 | public: |
---|
951 | typedef SubGraphAdaptor<Graph, ConstMap<typename Graph::Node,bool>, |
---|
952 | EdgeFilterMap, false> Parent; |
---|
953 | protected: |
---|
954 | ConstMap<typename Graph::Node, bool> const_true_map; |
---|
955 | |
---|
956 | EdgeSubGraphAdaptor() : const_true_map(true) { |
---|
957 | Parent::setNodeFilterMap(const_true_map); |
---|
958 | } |
---|
959 | |
---|
960 | public: |
---|
961 | |
---|
962 | EdgeSubGraphAdaptor(Graph& _graph, EdgeFilterMap& _edge_filter_map) : |
---|
963 | Parent(), const_true_map(true) { |
---|
964 | Parent::setGraph(_graph); |
---|
965 | Parent::setNodeFilterMap(const_true_map); |
---|
966 | Parent::setEdgeFilterMap(_edge_filter_map); |
---|
967 | } |
---|
968 | |
---|
969 | }; |
---|
970 | |
---|
971 | /// \brief Just gives back an edge sub graph adaptor |
---|
972 | /// |
---|
973 | /// Just gives back an edge sub graph adaptor |
---|
974 | template<typename Graph, typename EdgeFilterMap> |
---|
975 | EdgeSubGraphAdaptor<const Graph, EdgeFilterMap> |
---|
976 | edgeSubGraphAdaptor(const Graph& graph, EdgeFilterMap& efm) { |
---|
977 | return EdgeSubGraphAdaptor<const Graph, EdgeFilterMap>(graph, efm); |
---|
978 | } |
---|
979 | |
---|
980 | template<typename Graph, typename EdgeFilterMap> |
---|
981 | EdgeSubGraphAdaptor<const Graph, const EdgeFilterMap> |
---|
982 | edgeSubGraphAdaptor(const Graph& graph, const EdgeFilterMap& efm) { |
---|
983 | return EdgeSubGraphAdaptor<const Graph, const EdgeFilterMap>(graph, efm); |
---|
984 | } |
---|
985 | |
---|
986 | template <typename _Graph, typename Enable = void> |
---|
987 | class UndirGraphAdaptorBase : |
---|
988 | public UGraphBaseExtender<GraphAdaptorBase<_Graph> > { |
---|
989 | public: |
---|
990 | typedef _Graph Graph; |
---|
991 | typedef UndirGraphAdaptorBase Adaptor; |
---|
992 | typedef UGraphBaseExtender<GraphAdaptorBase<_Graph> > Parent; |
---|
993 | |
---|
994 | protected: |
---|
995 | |
---|
996 | UndirGraphAdaptorBase() : Parent() {} |
---|
997 | |
---|
998 | public: |
---|
999 | |
---|
1000 | typedef typename Parent::UEdge UEdge; |
---|
1001 | typedef typename Parent::Edge Edge; |
---|
1002 | |
---|
1003 | private: |
---|
1004 | |
---|
1005 | template <typename _Value> |
---|
1006 | class EdgeMapBase { |
---|
1007 | private: |
---|
1008 | |
---|
1009 | typedef typename _Graph::template EdgeMap<_Value> MapImpl; |
---|
1010 | |
---|
1011 | public: |
---|
1012 | |
---|
1013 | typedef typename MapTraits<MapImpl>::ReferenceMapTag ReferenceMapTag; |
---|
1014 | |
---|
1015 | typedef _Value Value; |
---|
1016 | typedef Edge Key; |
---|
1017 | |
---|
1018 | EdgeMapBase(const Adaptor& adaptor) : |
---|
1019 | forward_map(*adaptor.graph), backward_map(*adaptor.graph) {} |
---|
1020 | |
---|
1021 | EdgeMapBase(const Adaptor& adaptor, const Value& v) |
---|
1022 | : forward_map(*adaptor.graph, v), backward_map(*adaptor.graph, v) {} |
---|
1023 | |
---|
1024 | void set(const Edge& e, const Value& a) { |
---|
1025 | if (Parent::direction(e)) { |
---|
1026 | forward_map.set(e, a); |
---|
1027 | } else { |
---|
1028 | backward_map.set(e, a); |
---|
1029 | } |
---|
1030 | } |
---|
1031 | |
---|
1032 | typename MapTraits<MapImpl>::ConstReturnValue operator[](Edge e) const { |
---|
1033 | if (Parent::direction(e)) { |
---|
1034 | return forward_map[e]; |
---|
1035 | } else { |
---|
1036 | return backward_map[e]; |
---|
1037 | } |
---|
1038 | } |
---|
1039 | |
---|
1040 | typename MapTraits<MapImpl>::ReturnValue operator[](Edge e) { |
---|
1041 | if (Parent::direction(e)) { |
---|
1042 | return forward_map[e]; |
---|
1043 | } else { |
---|
1044 | return backward_map[e]; |
---|
1045 | } |
---|
1046 | } |
---|
1047 | |
---|
1048 | protected: |
---|
1049 | |
---|
1050 | MapImpl forward_map, backward_map; |
---|
1051 | |
---|
1052 | }; |
---|
1053 | |
---|
1054 | public: |
---|
1055 | |
---|
1056 | template <typename _Value> |
---|
1057 | class EdgeMap |
---|
1058 | : public SubMapExtender<Adaptor, EdgeMapBase<_Value> > |
---|
1059 | { |
---|
1060 | public: |
---|
1061 | typedef Adaptor Graph; |
---|
1062 | typedef SubMapExtender<Adaptor, EdgeMapBase<_Value> > Parent; |
---|
1063 | |
---|
1064 | EdgeMap(const Graph& graph) |
---|
1065 | : Parent(graph) {} |
---|
1066 | EdgeMap(const Graph& graph, const _Value& value) |
---|
1067 | : Parent(graph, value) {} |
---|
1068 | |
---|
1069 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
1070 | return operator=<EdgeMap>(cmap); |
---|
1071 | } |
---|
1072 | |
---|
1073 | template <typename CMap> |
---|
1074 | EdgeMap& operator=(const CMap& cmap) { |
---|
1075 | Parent::operator=(cmap); |
---|
1076 | return *this; |
---|
1077 | } |
---|
1078 | }; |
---|
1079 | |
---|
1080 | template <typename _Value> |
---|
1081 | class UEdgeMap : public Graph::template EdgeMap<_Value> { |
---|
1082 | public: |
---|
1083 | |
---|
1084 | typedef typename Graph::template EdgeMap<_Value> Parent; |
---|
1085 | |
---|
1086 | explicit UEdgeMap(const Adaptor& ga) |
---|
1087 | : Parent(*ga.graph) {} |
---|
1088 | |
---|
1089 | UEdgeMap(const Adaptor& ga, const _Value& value) |
---|
1090 | : Parent(*ga.graph, value) {} |
---|
1091 | |
---|
1092 | UEdgeMap& operator=(const UEdgeMap& cmap) { |
---|
1093 | return operator=<UEdgeMap>(cmap); |
---|
1094 | } |
---|
1095 | |
---|
1096 | template <typename CMap> |
---|
1097 | UEdgeMap& operator=(const CMap& cmap) { |
---|
1098 | Parent::operator=(cmap); |
---|
1099 | return *this; |
---|
1100 | } |
---|
1101 | |
---|
1102 | }; |
---|
1103 | |
---|
1104 | }; |
---|
1105 | |
---|
1106 | template <typename _Graph> |
---|
1107 | class UndirGraphAdaptorBase< |
---|
1108 | _Graph, typename enable_if< |
---|
1109 | typename _Graph::EdgeNotifier::Notifier>::type > |
---|
1110 | : public UGraphBaseExtender<GraphAdaptorBase<_Graph> > { |
---|
1111 | public: |
---|
1112 | |
---|
1113 | typedef _Graph Graph; |
---|
1114 | typedef UndirGraphAdaptorBase Adaptor; |
---|
1115 | typedef UGraphBaseExtender<GraphAdaptorBase<_Graph> > Parent; |
---|
1116 | |
---|
1117 | protected: |
---|
1118 | |
---|
1119 | UndirGraphAdaptorBase() |
---|
1120 | : edge_notifier(*this), edge_notifier_proxy(edge_notifier) {} |
---|
1121 | |
---|
1122 | void setGraph(_Graph& graph) { |
---|
1123 | Parent::setGraph(graph); |
---|
1124 | edge_notifier_proxy.setUEdgeNotifier(graph.getNotifier(UEdge())); |
---|
1125 | } |
---|
1126 | |
---|
1127 | public: |
---|
1128 | |
---|
1129 | ~UndirGraphAdaptorBase() { |
---|
1130 | edge_notifier.clear(); |
---|
1131 | } |
---|
1132 | |
---|
1133 | int maxId(typename Parent::Edge) const { |
---|
1134 | return Parent::maxEdgeId(); |
---|
1135 | } |
---|
1136 | |
---|
1137 | |
---|
1138 | typedef typename Parent::UEdge UEdge; |
---|
1139 | typedef typename Parent::Edge Edge; |
---|
1140 | |
---|
1141 | typedef typename Parent::EdgeNotifier UEdgeNotifier; |
---|
1142 | |
---|
1143 | using Parent::getNotifier; |
---|
1144 | |
---|
1145 | typedef AlterationNotifier<UndirGraphAdaptorBase, Edge> EdgeNotifier; |
---|
1146 | EdgeNotifier& getNotifier(Edge) const { return edge_notifier; } |
---|
1147 | |
---|
1148 | protected: |
---|
1149 | |
---|
1150 | class NotifierProxy : public UEdgeNotifier::ObserverBase { |
---|
1151 | public: |
---|
1152 | |
---|
1153 | typedef typename UEdgeNotifier::ObserverBase Parent; |
---|
1154 | typedef UndirGraphAdaptorBase AdaptorBase; |
---|
1155 | |
---|
1156 | NotifierProxy(EdgeNotifier& _edge_notifier) |
---|
1157 | : Parent(), edge_notifier(_edge_notifier) { |
---|
1158 | } |
---|
1159 | |
---|
1160 | virtual ~NotifierProxy() { |
---|
1161 | if (Parent::attached()) { |
---|
1162 | Parent::detach(); |
---|
1163 | } |
---|
1164 | } |
---|
1165 | |
---|
1166 | void setUEdgeNotifier(UEdgeNotifier& _uedge_notifier) { |
---|
1167 | Parent::attach(_uedge_notifier); |
---|
1168 | } |
---|
1169 | |
---|
1170 | |
---|
1171 | protected: |
---|
1172 | |
---|
1173 | virtual void add(const UEdge& uedge) { |
---|
1174 | std::vector<Edge> edges; |
---|
1175 | edges.push_back(AdaptorBase::Parent::direct(uedge, true)); |
---|
1176 | edges.push_back(AdaptorBase::Parent::direct(uedge, false)); |
---|
1177 | edge_notifier.add(edges); |
---|
1178 | } |
---|
1179 | virtual void add(const std::vector<UEdge>& uedges) { |
---|
1180 | std::vector<Edge> edges; |
---|
1181 | for (int i = 0; i < (int)uedges.size(); ++i) { |
---|
1182 | edges.push_back(AdaptorBase::Parent::direct(uedges[i], true)); |
---|
1183 | edges.push_back(AdaptorBase::Parent::direct(uedges[i], false)); |
---|
1184 | } |
---|
1185 | edge_notifier.add(edges); |
---|
1186 | } |
---|
1187 | virtual void erase(const UEdge& uedge) { |
---|
1188 | std::vector<Edge> edges; |
---|
1189 | edges.push_back(AdaptorBase::Parent::direct(uedge, true)); |
---|
1190 | edges.push_back(AdaptorBase::Parent::direct(uedge, false)); |
---|
1191 | edge_notifier.erase(edges); |
---|
1192 | } |
---|
1193 | virtual void erase(const std::vector<UEdge>& uedges) { |
---|
1194 | std::vector<Edge> edges; |
---|
1195 | for (int i = 0; i < (int)uedges.size(); ++i) { |
---|
1196 | edges.push_back(AdaptorBase::Parent::direct(uedges[i], true)); |
---|
1197 | edges.push_back(AdaptorBase::Parent::direct(uedges[i], false)); |
---|
1198 | } |
---|
1199 | edge_notifier.erase(edges); |
---|
1200 | } |
---|
1201 | virtual void build() { |
---|
1202 | edge_notifier.build(); |
---|
1203 | } |
---|
1204 | virtual void clear() { |
---|
1205 | edge_notifier.clear(); |
---|
1206 | } |
---|
1207 | |
---|
1208 | EdgeNotifier& edge_notifier; |
---|
1209 | }; |
---|
1210 | |
---|
1211 | |
---|
1212 | mutable EdgeNotifier edge_notifier; |
---|
1213 | NotifierProxy edge_notifier_proxy; |
---|
1214 | |
---|
1215 | private: |
---|
1216 | |
---|
1217 | template <typename _Value> |
---|
1218 | class EdgeMapBase { |
---|
1219 | private: |
---|
1220 | |
---|
1221 | typedef typename _Graph::template EdgeMap<_Value> MapImpl; |
---|
1222 | |
---|
1223 | public: |
---|
1224 | |
---|
1225 | typedef typename MapTraits<MapImpl>::ReferenceMapTag ReferenceMapTag; |
---|
1226 | |
---|
1227 | typedef _Value Value; |
---|
1228 | typedef Edge Key; |
---|
1229 | |
---|
1230 | EdgeMapBase(const Adaptor& adaptor) : |
---|
1231 | forward_map(*adaptor.graph), backward_map(*adaptor.graph) {} |
---|
1232 | |
---|
1233 | EdgeMapBase(const Adaptor& adaptor, const Value& v) |
---|
1234 | : forward_map(*adaptor.graph, v), backward_map(*adaptor.graph, v) {} |
---|
1235 | |
---|
1236 | void set(const Edge& e, const Value& a) { |
---|
1237 | if (Parent::direction(e)) { |
---|
1238 | forward_map.set(e, a); |
---|
1239 | } else { |
---|
1240 | backward_map.set(e, a); |
---|
1241 | } |
---|
1242 | } |
---|
1243 | |
---|
1244 | typename MapTraits<MapImpl>::ConstReturnValue operator[](Edge e) const { |
---|
1245 | if (Parent::direction(e)) { |
---|
1246 | return forward_map[e]; |
---|
1247 | } else { |
---|
1248 | return backward_map[e]; |
---|
1249 | } |
---|
1250 | } |
---|
1251 | |
---|
1252 | typename MapTraits<MapImpl>::ReturnValue operator[](Edge e) { |
---|
1253 | if (Parent::direction(e)) { |
---|
1254 | return forward_map[e]; |
---|
1255 | } else { |
---|
1256 | return backward_map[e]; |
---|
1257 | } |
---|
1258 | } |
---|
1259 | |
---|
1260 | protected: |
---|
1261 | |
---|
1262 | MapImpl forward_map, backward_map; |
---|
1263 | |
---|
1264 | }; |
---|
1265 | |
---|
1266 | public: |
---|
1267 | |
---|
1268 | template <typename _Value> |
---|
1269 | class EdgeMap |
---|
1270 | : public SubMapExtender<Adaptor, EdgeMapBase<_Value> > |
---|
1271 | { |
---|
1272 | public: |
---|
1273 | typedef Adaptor Graph; |
---|
1274 | typedef SubMapExtender<Adaptor, EdgeMapBase<_Value> > Parent; |
---|
1275 | |
---|
1276 | EdgeMap(const Graph& graph) |
---|
1277 | : Parent(graph) {} |
---|
1278 | EdgeMap(const Graph& graph, const _Value& value) |
---|
1279 | : Parent(graph, value) {} |
---|
1280 | |
---|
1281 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
1282 | return operator=<EdgeMap>(cmap); |
---|
1283 | } |
---|
1284 | |
---|
1285 | template <typename CMap> |
---|
1286 | EdgeMap& operator=(const CMap& cmap) { |
---|
1287 | Parent::operator=(cmap); |
---|
1288 | return *this; |
---|
1289 | } |
---|
1290 | }; |
---|
1291 | |
---|
1292 | template <typename _Value> |
---|
1293 | class UEdgeMap : public Graph::template EdgeMap<_Value> { |
---|
1294 | public: |
---|
1295 | |
---|
1296 | typedef typename Graph::template EdgeMap<_Value> Parent; |
---|
1297 | |
---|
1298 | explicit UEdgeMap(const Adaptor& ga) |
---|
1299 | : Parent(*ga.graph) {} |
---|
1300 | |
---|
1301 | UEdgeMap(const Adaptor& ga, const _Value& value) |
---|
1302 | : Parent(*ga.graph, value) {} |
---|
1303 | |
---|
1304 | UEdgeMap& operator=(const UEdgeMap& cmap) { |
---|
1305 | return operator=<UEdgeMap>(cmap); |
---|
1306 | } |
---|
1307 | |
---|
1308 | template <typename CMap> |
---|
1309 | UEdgeMap& operator=(const CMap& cmap) { |
---|
1310 | Parent::operator=(cmap); |
---|
1311 | return *this; |
---|
1312 | } |
---|
1313 | |
---|
1314 | }; |
---|
1315 | |
---|
1316 | }; |
---|
1317 | |
---|
1318 | ///\brief An undirected graph is made from a directed graph by an adaptor |
---|
1319 | ///\ingroup graph_adaptors |
---|
1320 | /// |
---|
1321 | /// Undocumented, untested!!! |
---|
1322 | /// If somebody knows nice demo application, let's polulate it. |
---|
1323 | /// |
---|
1324 | /// \author Marton Makai |
---|
1325 | template<typename _Graph> |
---|
1326 | class UndirGraphAdaptor : |
---|
1327 | public UGraphAdaptorExtender< |
---|
1328 | UndirGraphAdaptorBase<_Graph> > { |
---|
1329 | public: |
---|
1330 | typedef _Graph Graph; |
---|
1331 | typedef UGraphAdaptorExtender< |
---|
1332 | UndirGraphAdaptorBase<_Graph> > Parent; |
---|
1333 | protected: |
---|
1334 | UndirGraphAdaptor() { } |
---|
1335 | public: |
---|
1336 | UndirGraphAdaptor(_Graph& _graph) { |
---|
1337 | setGraph(_graph); |
---|
1338 | } |
---|
1339 | |
---|
1340 | template <typename _ForwardMap, typename _BackwardMap> |
---|
1341 | class CombinedEdgeMap { |
---|
1342 | public: |
---|
1343 | |
---|
1344 | typedef _ForwardMap ForwardMap; |
---|
1345 | typedef _BackwardMap BackwardMap; |
---|
1346 | |
---|
1347 | typedef typename MapTraits<ForwardMap>::ReferenceMapTag ReferenceMapTag; |
---|
1348 | |
---|
1349 | typedef typename ForwardMap::Value Value; |
---|
1350 | typedef typename Parent::Edge Key; |
---|
1351 | |
---|
1352 | CombinedEdgeMap() : forward_map(0), backward_map(0) {} |
---|
1353 | |
---|
1354 | CombinedEdgeMap(ForwardMap& _forward_map, BackwardMap& _backward_map) |
---|
1355 | : forward_map(&_forward_map), backward_map(&_backward_map) {} |
---|
1356 | |
---|
1357 | void set(const Key& e, const Value& a) { |
---|
1358 | if (Parent::direction(e)) { |
---|
1359 | forward_map->set(e, a); |
---|
1360 | } else { |
---|
1361 | backward_map->set(e, a); |
---|
1362 | } |
---|
1363 | } |
---|
1364 | |
---|
1365 | typename MapTraits<ForwardMap>::ConstReturnValue |
---|
1366 | operator[](const Key& e) const { |
---|
1367 | if (Parent::direction(e)) { |
---|
1368 | return (*forward_map)[e]; |
---|
1369 | } else { |
---|
1370 | return (*backward_map)[e]; |
---|
1371 | } |
---|
1372 | } |
---|
1373 | |
---|
1374 | typename MapTraits<ForwardMap>::ReturnValue |
---|
1375 | operator[](const Key& e) { |
---|
1376 | if (Parent::direction(e)) { |
---|
1377 | return (*forward_map)[e]; |
---|
1378 | } else { |
---|
1379 | return (*backward_map)[e]; |
---|
1380 | } |
---|
1381 | } |
---|
1382 | |
---|
1383 | void setForwardMap(ForwardMap& _forward_map) { |
---|
1384 | forward_map = &_forward_map; |
---|
1385 | } |
---|
1386 | |
---|
1387 | void setBackwardMap(BackwardMap& _backward_map) { |
---|
1388 | backward_map = &_backward_map; |
---|
1389 | } |
---|
1390 | |
---|
1391 | protected: |
---|
1392 | |
---|
1393 | ForwardMap* forward_map; |
---|
1394 | BackwardMap* backward_map; |
---|
1395 | |
---|
1396 | }; |
---|
1397 | |
---|
1398 | }; |
---|
1399 | |
---|
1400 | /// \brief Just gives back an undir graph adaptor |
---|
1401 | /// |
---|
1402 | /// Just gives back an undir graph adaptor |
---|
1403 | template<typename Graph> |
---|
1404 | UndirGraphAdaptor<const Graph> |
---|
1405 | undirGraphAdaptor(const Graph& graph) { |
---|
1406 | return UndirGraphAdaptor<const Graph>(graph); |
---|
1407 | } |
---|
1408 | |
---|
1409 | template<typename Graph, typename Number, |
---|
1410 | typename CapacityMap, typename FlowMap, |
---|
1411 | typename Tolerance = Tolerance<Number> > |
---|
1412 | class ResForwardFilter { |
---|
1413 | const CapacityMap* capacity; |
---|
1414 | const FlowMap* flow; |
---|
1415 | Tolerance tolerance; |
---|
1416 | public: |
---|
1417 | typedef typename Graph::Edge Key; |
---|
1418 | typedef bool Value; |
---|
1419 | |
---|
1420 | ResForwardFilter(const CapacityMap& _capacity, const FlowMap& _flow, |
---|
1421 | const Tolerance& _tolerance = Tolerance()) |
---|
1422 | : capacity(&_capacity), flow(&_flow), tolerance(_tolerance) { } |
---|
1423 | |
---|
1424 | ResForwardFilter(const Tolerance& _tolerance) |
---|
1425 | : capacity(0), flow(0), tolerance(_tolerance) { } |
---|
1426 | |
---|
1427 | void setCapacity(const CapacityMap& _capacity) { capacity = &_capacity; } |
---|
1428 | void setFlow(const FlowMap& _flow) { flow = &_flow; } |
---|
1429 | |
---|
1430 | bool operator[](const typename Graph::Edge& e) const { |
---|
1431 | return tolerance.less((*flow)[e], (*capacity)[e]); |
---|
1432 | } |
---|
1433 | }; |
---|
1434 | |
---|
1435 | template<typename Graph, typename Number, |
---|
1436 | typename CapacityMap, typename FlowMap, |
---|
1437 | typename Tolerance = Tolerance<Number> > |
---|
1438 | class ResBackwardFilter { |
---|
1439 | const CapacityMap* capacity; |
---|
1440 | const FlowMap* flow; |
---|
1441 | Tolerance tolerance; |
---|
1442 | public: |
---|
1443 | typedef typename Graph::Edge Key; |
---|
1444 | typedef bool Value; |
---|
1445 | |
---|
1446 | ResBackwardFilter(const CapacityMap& _capacity, const FlowMap& _flow, |
---|
1447 | const Tolerance& _tolerance = Tolerance()) |
---|
1448 | : capacity(&_capacity), flow(&_flow), tolerance(_tolerance) { } |
---|
1449 | ResBackwardFilter(const Tolerance& _tolerance = Tolerance()) |
---|
1450 | : capacity(0), flow(0), tolerance(_tolerance) { } |
---|
1451 | void setCapacity(const CapacityMap& _capacity) { capacity = &_capacity; } |
---|
1452 | void setFlow(const FlowMap& _flow) { flow = &_flow; } |
---|
1453 | bool operator[](const typename Graph::Edge& e) const { |
---|
1454 | return tolerance.less(0, Number((*flow)[e])); |
---|
1455 | } |
---|
1456 | }; |
---|
1457 | |
---|
1458 | |
---|
1459 | ///\brief An adaptor for composing the residual |
---|
1460 | ///graph for directed flow and circulation problems. |
---|
1461 | /// |
---|
1462 | ///\ingroup graph_adaptors |
---|
1463 | /// |
---|
1464 | ///An adaptor for composing the residual graph for directed flow and |
---|
1465 | ///circulation problems. Let \f$ G=(V, A) \f$ be a directed graph |
---|
1466 | ///and let \f$ F \f$ be a number type. Let moreover \f$ f,c:A\to F \f$, |
---|
1467 | ///be functions on the edge-set. |
---|
1468 | /// |
---|
1469 | ///In the appications of ResGraphAdaptor, \f$ f \f$ usually stands |
---|
1470 | ///for a flow and \f$ c \f$ for a capacity function. Suppose that a |
---|
1471 | ///graph instange \c g of type \c ListGraph implements \f$ G \f$. |
---|
1472 | /// |
---|
1473 | ///\code |
---|
1474 | /// ListGraph g; |
---|
1475 | ///\endcode |
---|
1476 | /// |
---|
1477 | ///Then RevGraphAdaptor implements the graph structure with node-set |
---|
1478 | /// \f$ V \f$ and edge-set \f$ A_{forward}\cup A_{backward} \f$, |
---|
1479 | ///where \f$ A_{forward}=\{uv : uv\in A, f(uv)<c(uv)\} \f$ and |
---|
1480 | /// \f$ A_{backward}=\{vu : uv\in A, f(uv)>0\} \f$, i.e. the so called |
---|
1481 | ///residual graph. When we take the union |
---|
1482 | /// \f$ A_{forward}\cup A_{backward} \f$, multilicities are counted, i.e. |
---|
1483 | ///if an edge is in both \f$ A_{forward} \f$ and \f$ A_{backward} \f$, |
---|
1484 | ///then in the adaptor it appears twice. The following code shows how |
---|
1485 | ///such an instance can be constructed. |
---|
1486 | /// |
---|
1487 | ///\code |
---|
1488 | /// typedef ListGraph Graph; |
---|
1489 | /// Graph::EdgeMap<int> f(g); |
---|
1490 | /// Graph::EdgeMap<int> c(g); |
---|
1491 | /// ResGraphAdaptor<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > ga(g); |
---|
1492 | ///\endcode |
---|
1493 | ///\author Marton Makai |
---|
1494 | /// |
---|
1495 | template<typename Graph, typename Number, |
---|
1496 | typename CapacityMap, typename FlowMap, |
---|
1497 | typename Tolerance = Tolerance<Number> > |
---|
1498 | class ResGraphAdaptor : |
---|
1499 | public EdgeSubGraphAdaptor< |
---|
1500 | UndirGraphAdaptor<const Graph>, |
---|
1501 | typename UndirGraphAdaptor<const Graph>::template CombinedEdgeMap< |
---|
1502 | ResForwardFilter<const Graph, Number, CapacityMap, FlowMap>, |
---|
1503 | ResBackwardFilter<const Graph, Number, CapacityMap, FlowMap> > > { |
---|
1504 | public: |
---|
1505 | |
---|
1506 | typedef UndirGraphAdaptor<const Graph> UGraph; |
---|
1507 | |
---|
1508 | typedef ResForwardFilter<const Graph, Number, CapacityMap, FlowMap> |
---|
1509 | ForwardFilter; |
---|
1510 | |
---|
1511 | typedef ResBackwardFilter<const Graph, Number, CapacityMap, FlowMap> |
---|
1512 | BackwardFilter; |
---|
1513 | |
---|
1514 | typedef typename UGraph:: |
---|
1515 | template CombinedEdgeMap<ForwardFilter, BackwardFilter> |
---|
1516 | EdgeFilter; |
---|
1517 | |
---|
1518 | typedef EdgeSubGraphAdaptor<UGraph, EdgeFilter> Parent; |
---|
1519 | |
---|
1520 | protected: |
---|
1521 | |
---|
1522 | const CapacityMap* capacity; |
---|
1523 | FlowMap* flow; |
---|
1524 | |
---|
1525 | UGraph ugraph; |
---|
1526 | ForwardFilter forward_filter; |
---|
1527 | BackwardFilter backward_filter; |
---|
1528 | EdgeFilter edge_filter; |
---|
1529 | |
---|
1530 | void setCapacityMap(const CapacityMap& _capacity) { |
---|
1531 | capacity=&_capacity; |
---|
1532 | forward_filter.setCapacity(_capacity); |
---|
1533 | backward_filter.setCapacity(_capacity); |
---|
1534 | } |
---|
1535 | |
---|
1536 | void setFlowMap(FlowMap& _flow) { |
---|
1537 | flow=&_flow; |
---|
1538 | forward_filter.setFlow(_flow); |
---|
1539 | backward_filter.setFlow(_flow); |
---|
1540 | } |
---|
1541 | |
---|
1542 | public: |
---|
1543 | |
---|
1544 | /// \brief Constructor of the residual graph. |
---|
1545 | /// |
---|
1546 | /// Constructor of the residual graph. The parameters are the graph type, |
---|
1547 | /// the flow map, the capacity map and a tolerance object. |
---|
1548 | ResGraphAdaptor(const Graph& _graph, const CapacityMap& _capacity, |
---|
1549 | FlowMap& _flow, const Tolerance& _tolerance = Tolerance()) |
---|
1550 | : Parent(), capacity(&_capacity), flow(&_flow), ugraph(_graph), |
---|
1551 | forward_filter(_capacity, _flow, _tolerance), |
---|
1552 | backward_filter(_capacity, _flow, _tolerance), |
---|
1553 | edge_filter(forward_filter, backward_filter) |
---|
1554 | { |
---|
1555 | Parent::setGraph(ugraph); |
---|
1556 | Parent::setEdgeFilterMap(edge_filter); |
---|
1557 | } |
---|
1558 | |
---|
1559 | typedef typename Parent::Edge Edge; |
---|
1560 | |
---|
1561 | /// \brief Gives back the residual capacity of the edge. |
---|
1562 | /// |
---|
1563 | /// Gives back the residual capacity of the edge. |
---|
1564 | Number rescap(const Edge& edge) const { |
---|
1565 | if (UGraph::direction(edge)) { |
---|
1566 | return (*capacity)[edge]-(*flow)[edge]; |
---|
1567 | } else { |
---|
1568 | return (*flow)[edge]; |
---|
1569 | } |
---|
1570 | } |
---|
1571 | |
---|
1572 | /// \brief Augment on the given edge in the residual graph. |
---|
1573 | /// |
---|
1574 | /// Augment on the given edge in the residual graph. It increase |
---|
1575 | /// or decrease the flow on the original edge depend on the direction |
---|
1576 | /// of the residual edge. |
---|
1577 | void augment(const Edge& e, Number a) const { |
---|
1578 | if (UGraph::direction(e)) { |
---|
1579 | flow->set(e, (*flow)[e] + a); |
---|
1580 | } else { |
---|
1581 | flow->set(e, (*flow)[e] - a); |
---|
1582 | } |
---|
1583 | } |
---|
1584 | |
---|
1585 | /// \brief Returns the direction of the edge. |
---|
1586 | /// |
---|
1587 | /// Returns true when the edge is same oriented as the original edge. |
---|
1588 | static bool forward(const Edge& e) { |
---|
1589 | return UGraph::direction(e); |
---|
1590 | } |
---|
1591 | |
---|
1592 | /// \brief Returns the direction of the edge. |
---|
1593 | /// |
---|
1594 | /// Returns true when the edge is opposite oriented as the original edge. |
---|
1595 | static bool backward(const Edge& e) { |
---|
1596 | return !UGraph::direction(e); |
---|
1597 | } |
---|
1598 | |
---|
1599 | /// \brief Gives back the forward oriented residual edge. |
---|
1600 | /// |
---|
1601 | /// Gives back the forward oriented residual edge. |
---|
1602 | static Edge forward(const typename Graph::Edge& e) { |
---|
1603 | return UGraph::direct(e, true); |
---|
1604 | } |
---|
1605 | |
---|
1606 | /// \brief Gives back the backward oriented residual edge. |
---|
1607 | /// |
---|
1608 | /// Gives back the backward oriented residual edge. |
---|
1609 | static Edge backward(const typename Graph::Edge& e) { |
---|
1610 | return UGraph::direct(e, false); |
---|
1611 | } |
---|
1612 | |
---|
1613 | /// \brief Residual capacity map. |
---|
1614 | /// |
---|
1615 | /// In generic residual graphs the residual capacity can be obtained |
---|
1616 | /// as a map. |
---|
1617 | class ResCap { |
---|
1618 | protected: |
---|
1619 | const ResGraphAdaptor* res_graph; |
---|
1620 | public: |
---|
1621 | typedef Number Value; |
---|
1622 | typedef Edge Key; |
---|
1623 | ResCap(const ResGraphAdaptor& _res_graph) |
---|
1624 | : res_graph(&_res_graph) {} |
---|
1625 | |
---|
1626 | Number operator[](const Edge& e) const { |
---|
1627 | return res_graph->rescap(e); |
---|
1628 | } |
---|
1629 | |
---|
1630 | }; |
---|
1631 | |
---|
1632 | }; |
---|
1633 | |
---|
1634 | |
---|
1635 | |
---|
1636 | template <typename _Graph, typename FirstOutEdgesMap> |
---|
1637 | class ErasingFirstGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
---|
1638 | public: |
---|
1639 | typedef _Graph Graph; |
---|
1640 | typedef GraphAdaptorBase<_Graph> Parent; |
---|
1641 | protected: |
---|
1642 | FirstOutEdgesMap* first_out_edges; |
---|
1643 | ErasingFirstGraphAdaptorBase() : Parent(), |
---|
1644 | first_out_edges(0) { } |
---|
1645 | |
---|
1646 | void setFirstOutEdgesMap(FirstOutEdgesMap& _first_out_edges) { |
---|
1647 | first_out_edges=&_first_out_edges; |
---|
1648 | } |
---|
1649 | |
---|
1650 | public: |
---|
1651 | |
---|
1652 | typedef typename Parent::Node Node; |
---|
1653 | typedef typename Parent::Edge Edge; |
---|
1654 | |
---|
1655 | void firstOut(Edge& i, const Node& n) const { |
---|
1656 | i=(*first_out_edges)[n]; |
---|
1657 | } |
---|
1658 | |
---|
1659 | void erase(const Edge& e) const { |
---|
1660 | Node n=source(e); |
---|
1661 | Edge f=e; |
---|
1662 | Parent::nextOut(f); |
---|
1663 | first_out_edges->set(n, f); |
---|
1664 | } |
---|
1665 | }; |
---|
1666 | |
---|
1667 | |
---|
1668 | ///\brief For blocking flows. |
---|
1669 | ///\ingroup graph_adaptors |
---|
1670 | /// |
---|
1671 | ///This graph adaptor is used for on-the-fly |
---|
1672 | ///Dinits blocking flow computations. |
---|
1673 | ///For each node, an out-edge is stored which is used when the |
---|
1674 | ///\code |
---|
1675 | ///OutEdgeIt& first(OutEdgeIt&, const Node&) |
---|
1676 | ///\endcode |
---|
1677 | ///is called. |
---|
1678 | /// |
---|
1679 | ///\author Marton Makai |
---|
1680 | /// |
---|
1681 | template <typename _Graph, typename FirstOutEdgesMap> |
---|
1682 | class ErasingFirstGraphAdaptor : |
---|
1683 | public GraphAdaptorExtender< |
---|
1684 | ErasingFirstGraphAdaptorBase<_Graph, FirstOutEdgesMap> > { |
---|
1685 | public: |
---|
1686 | typedef _Graph Graph; |
---|
1687 | typedef GraphAdaptorExtender< |
---|
1688 | ErasingFirstGraphAdaptorBase<_Graph, FirstOutEdgesMap> > Parent; |
---|
1689 | ErasingFirstGraphAdaptor(Graph& _graph, |
---|
1690 | FirstOutEdgesMap& _first_out_edges) { |
---|
1691 | setGraph(_graph); |
---|
1692 | setFirstOutEdgesMap(_first_out_edges); |
---|
1693 | } |
---|
1694 | |
---|
1695 | }; |
---|
1696 | |
---|
1697 | // template <typename _Graph> |
---|
1698 | // class SplitGraphAdaptorBase |
---|
1699 | // : public GraphAdaptorBase<_Graph> { |
---|
1700 | // public: |
---|
1701 | // typedef GraphAdaptorBase<_Graph> Parent; |
---|
1702 | |
---|
1703 | // class Node; |
---|
1704 | // class Edge; |
---|
1705 | // template <typename T> class NodeMap; |
---|
1706 | // template <typename T> class EdgeMap; |
---|
1707 | |
---|
1708 | |
---|
1709 | // class Node : public Parent::Node { |
---|
1710 | // friend class SplitGraphAdaptorBase; |
---|
1711 | // template <typename T> friend class NodeMap; |
---|
1712 | // typedef typename Parent::Node NodeParent; |
---|
1713 | // private: |
---|
1714 | |
---|
1715 | // bool entry; |
---|
1716 | // Node(typename Parent::Node _node, bool _entry) |
---|
1717 | // : Parent::Node(_node), entry(_entry) {} |
---|
1718 | |
---|
1719 | // public: |
---|
1720 | // Node() {} |
---|
1721 | // Node(Invalid) : NodeParent(INVALID), entry(true) {} |
---|
1722 | |
---|
1723 | // bool operator==(const Node& node) const { |
---|
1724 | // return NodeParent::operator==(node) && entry == node.entry; |
---|
1725 | // } |
---|
1726 | |
---|
1727 | // bool operator!=(const Node& node) const { |
---|
1728 | // return !(*this == node); |
---|
1729 | // } |
---|
1730 | |
---|
1731 | // bool operator<(const Node& node) const { |
---|
1732 | // return NodeParent::operator<(node) || |
---|
1733 | // (NodeParent::operator==(node) && entry < node.entry); |
---|
1734 | // } |
---|
1735 | // }; |
---|
1736 | |
---|
1737 | // /// \todo May we want VARIANT/union type |
---|
1738 | // class Edge : public Parent::Edge { |
---|
1739 | // friend class SplitGraphAdaptorBase; |
---|
1740 | // template <typename T> friend class EdgeMap; |
---|
1741 | // private: |
---|
1742 | // typedef typename Parent::Edge EdgeParent; |
---|
1743 | // typedef typename Parent::Node NodeParent; |
---|
1744 | // NodeParent bind; |
---|
1745 | |
---|
1746 | // Edge(const EdgeParent& edge, const NodeParent& node) |
---|
1747 | // : EdgeParent(edge), bind(node) {} |
---|
1748 | // public: |
---|
1749 | // Edge() {} |
---|
1750 | // Edge(Invalid) : EdgeParent(INVALID), bind(INVALID) {} |
---|
1751 | |
---|
1752 | // bool operator==(const Edge& edge) const { |
---|
1753 | // return EdgeParent::operator==(edge) && bind == edge.bind; |
---|
1754 | // } |
---|
1755 | |
---|
1756 | // bool operator!=(const Edge& edge) const { |
---|
1757 | // return !(*this == edge); |
---|
1758 | // } |
---|
1759 | |
---|
1760 | // bool operator<(const Edge& edge) const { |
---|
1761 | // return EdgeParent::operator<(edge) || |
---|
1762 | // (EdgeParent::operator==(edge) && bind < edge.bind); |
---|
1763 | // } |
---|
1764 | // }; |
---|
1765 | |
---|
1766 | // void first(Node& node) const { |
---|
1767 | // Parent::first(node); |
---|
1768 | // node.entry = true; |
---|
1769 | // } |
---|
1770 | |
---|
1771 | // void next(Node& node) const { |
---|
1772 | // if (node.entry) { |
---|
1773 | // node.entry = false; |
---|
1774 | // } else { |
---|
1775 | // node.entry = true; |
---|
1776 | // Parent::next(node); |
---|
1777 | // } |
---|
1778 | // } |
---|
1779 | |
---|
1780 | // void first(Edge& edge) const { |
---|
1781 | // Parent::first(edge); |
---|
1782 | // if ((typename Parent::Edge&)edge == INVALID) { |
---|
1783 | // Parent::first(edge.bind); |
---|
1784 | // } else { |
---|
1785 | // edge.bind = INVALID; |
---|
1786 | // } |
---|
1787 | // } |
---|
1788 | |
---|
1789 | // void next(Edge& edge) const { |
---|
1790 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1791 | // Parent::next(edge); |
---|
1792 | // if ((typename Parent::Edge&)edge == INVALID) { |
---|
1793 | // Parent::first(edge.bind); |
---|
1794 | // } |
---|
1795 | // } else { |
---|
1796 | // Parent::next(edge.bind); |
---|
1797 | // } |
---|
1798 | // } |
---|
1799 | |
---|
1800 | // void firstIn(Edge& edge, const Node& node) const { |
---|
1801 | // if (node.entry) { |
---|
1802 | // Parent::firstIn(edge, node); |
---|
1803 | // edge.bind = INVALID; |
---|
1804 | // } else { |
---|
1805 | // (typename Parent::Edge&)edge = INVALID; |
---|
1806 | // edge.bind = node; |
---|
1807 | // } |
---|
1808 | // } |
---|
1809 | |
---|
1810 | // void nextIn(Edge& edge) const { |
---|
1811 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1812 | // Parent::nextIn(edge); |
---|
1813 | // } else { |
---|
1814 | // edge.bind = INVALID; |
---|
1815 | // } |
---|
1816 | // } |
---|
1817 | |
---|
1818 | // void firstOut(Edge& edge, const Node& node) const { |
---|
1819 | // if (!node.entry) { |
---|
1820 | // Parent::firstOut(edge, node); |
---|
1821 | // edge.bind = INVALID; |
---|
1822 | // } else { |
---|
1823 | // (typename Parent::Edge&)edge = INVALID; |
---|
1824 | // edge.bind = node; |
---|
1825 | // } |
---|
1826 | // } |
---|
1827 | |
---|
1828 | // void nextOut(Edge& edge) const { |
---|
1829 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1830 | // Parent::nextOut(edge); |
---|
1831 | // } else { |
---|
1832 | // edge.bind = INVALID; |
---|
1833 | // } |
---|
1834 | // } |
---|
1835 | |
---|
1836 | // Node source(const Edge& edge) const { |
---|
1837 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1838 | // return Node(Parent::source(edge), false); |
---|
1839 | // } else { |
---|
1840 | // return Node(edge.bind, true); |
---|
1841 | // } |
---|
1842 | // } |
---|
1843 | |
---|
1844 | // Node target(const Edge& edge) const { |
---|
1845 | // if ((typename Parent::Edge&)edge != INVALID) { |
---|
1846 | // return Node(Parent::target(edge), true); |
---|
1847 | // } else { |
---|
1848 | // return Node(edge.bind, false); |
---|
1849 | // } |
---|
1850 | // } |
---|
1851 | |
---|
1852 | // static bool entryNode(const Node& node) { |
---|
1853 | // return node.entry; |
---|
1854 | // } |
---|
1855 | |
---|
1856 | // static bool exitNode(const Node& node) { |
---|
1857 | // return !node.entry; |
---|
1858 | // } |
---|
1859 | |
---|
1860 | // static Node getEntry(const typename Parent::Node& node) { |
---|
1861 | // return Node(node, true); |
---|
1862 | // } |
---|
1863 | |
---|
1864 | // static Node getExit(const typename Parent::Node& node) { |
---|
1865 | // return Node(node, false); |
---|
1866 | // } |
---|
1867 | |
---|
1868 | // static bool originalEdge(const Edge& edge) { |
---|
1869 | // return (typename Parent::Edge&)edge != INVALID; |
---|
1870 | // } |
---|
1871 | |
---|
1872 | // static bool bindingEdge(const Edge& edge) { |
---|
1873 | // return edge.bind != INVALID; |
---|
1874 | // } |
---|
1875 | |
---|
1876 | // static Node getBindedNode(const Edge& edge) { |
---|
1877 | // return edge.bind; |
---|
1878 | // } |
---|
1879 | |
---|
1880 | // int nodeNum() const { |
---|
1881 | // return Parent::nodeNum() * 2; |
---|
1882 | // } |
---|
1883 | |
---|
1884 | // typedef True EdgeNumTag; |
---|
1885 | |
---|
1886 | // int edgeNum() const { |
---|
1887 | // return countEdges() + Parent::nodeNum(); |
---|
1888 | // } |
---|
1889 | |
---|
1890 | // Edge findEdge(const Node& source, const Node& target, |
---|
1891 | // const Edge& prev = INVALID) const { |
---|
1892 | // if (exitNode(source) && entryNode(target)) { |
---|
1893 | // return Parent::findEdge(source, target, prev); |
---|
1894 | // } else { |
---|
1895 | // if (prev == INVALID && entryNode(source) && exitNode(target) && |
---|
1896 | // (typename Parent::Node&)source == (typename Parent::Node&)target) { |
---|
1897 | // return Edge(INVALID, source); |
---|
1898 | // } else { |
---|
1899 | // return INVALID; |
---|
1900 | // } |
---|
1901 | // } |
---|
1902 | // } |
---|
1903 | |
---|
1904 | // template <typename T> |
---|
1905 | // class NodeMap : public MapBase<Node, T> { |
---|
1906 | // typedef typename Parent::template NodeMap<T> NodeImpl; |
---|
1907 | // public: |
---|
1908 | // NodeMap(const SplitGraphAdaptorBase& _graph) |
---|
1909 | // : entry(_graph), exit(_graph) {} |
---|
1910 | // NodeMap(const SplitGraphAdaptorBase& _graph, const T& t) |
---|
1911 | // : entry(_graph, t), exit(_graph, t) {} |
---|
1912 | |
---|
1913 | // void set(const Node& key, const T& val) { |
---|
1914 | // if (key.entry) { entry.set(key, val); } |
---|
1915 | // else {exit.set(key, val); } |
---|
1916 | // } |
---|
1917 | |
---|
1918 | // typename MapTraits<NodeImpl>::ReturnValue |
---|
1919 | // operator[](const Node& key) { |
---|
1920 | // if (key.entry) { return entry[key]; } |
---|
1921 | // else { return exit[key]; } |
---|
1922 | // } |
---|
1923 | |
---|
1924 | // typename MapTraits<NodeImpl>::ConstReturnValue |
---|
1925 | // operator[](const Node& key) const { |
---|
1926 | // if (key.entry) { return entry[key]; } |
---|
1927 | // else { return exit[key]; } |
---|
1928 | // } |
---|
1929 | |
---|
1930 | // private: |
---|
1931 | // NodeImpl entry, exit; |
---|
1932 | // }; |
---|
1933 | |
---|
1934 | // template <typename T> |
---|
1935 | // class EdgeMap : public MapBase<Edge, T> { |
---|
1936 | // typedef typename Parent::template NodeMap<T> NodeImpl; |
---|
1937 | // typedef typename Parent::template EdgeMap<T> EdgeImpl; |
---|
1938 | // public: |
---|
1939 | // EdgeMap(const SplitGraphAdaptorBase& _graph) |
---|
1940 | // : bind(_graph), orig(_graph) {} |
---|
1941 | // EdgeMap(const SplitGraphAdaptorBase& _graph, const T& t) |
---|
1942 | // : bind(_graph, t), orig(_graph, t) {} |
---|
1943 | |
---|
1944 | // void set(const Edge& key, const T& val) { |
---|
1945 | // if ((typename Parent::Edge&)key != INVALID) { orig.set(key, val); } |
---|
1946 | // else {bind.set(key.bind, val); } |
---|
1947 | // } |
---|
1948 | |
---|
1949 | // typename MapTraits<EdgeImpl>::ReturnValue |
---|
1950 | // operator[](const Edge& key) { |
---|
1951 | // if ((typename Parent::Edge&)key != INVALID) { return orig[key]; } |
---|
1952 | // else {return bind[key.bind]; } |
---|
1953 | // } |
---|
1954 | |
---|
1955 | // typename MapTraits<EdgeImpl>::ConstReturnValue |
---|
1956 | // operator[](const Edge& key) const { |
---|
1957 | // if ((typename Parent::Edge&)key != INVALID) { return orig[key]; } |
---|
1958 | // else {return bind[key.bind]; } |
---|
1959 | // } |
---|
1960 | |
---|
1961 | // private: |
---|
1962 | // typename Parent::template NodeMap<T> bind; |
---|
1963 | // typename Parent::template EdgeMap<T> orig; |
---|
1964 | // }; |
---|
1965 | |
---|
1966 | // template <typename EntryMap, typename ExitMap> |
---|
1967 | // class CombinedNodeMap : public MapBase<Node, typename EntryMap::Value> { |
---|
1968 | // public: |
---|
1969 | // typedef MapBase<Node, typename EntryMap::Value> Parent; |
---|
1970 | |
---|
1971 | // typedef typename Parent::Key Key; |
---|
1972 | // typedef typename Parent::Value Value; |
---|
1973 | |
---|
1974 | // CombinedNodeMap(EntryMap& _entryMap, ExitMap& _exitMap) |
---|
1975 | // : entryMap(_entryMap), exitMap(_exitMap) {} |
---|
1976 | |
---|
1977 | // Value& operator[](const Key& key) { |
---|
1978 | // if (key.entry) { |
---|
1979 | // return entryMap[key]; |
---|
1980 | // } else { |
---|
1981 | // return exitMap[key]; |
---|
1982 | // } |
---|
1983 | // } |
---|
1984 | |
---|
1985 | // Value operator[](const Key& key) const { |
---|
1986 | // if (key.entry) { |
---|
1987 | // return entryMap[key]; |
---|
1988 | // } else { |
---|
1989 | // return exitMap[key]; |
---|
1990 | // } |
---|
1991 | // } |
---|
1992 | |
---|
1993 | // void set(const Key& key, const Value& value) { |
---|
1994 | // if (key.entry) { |
---|
1995 | // entryMap.set(key, value); |
---|
1996 | // } else { |
---|
1997 | // exitMap.set(key, value); |
---|
1998 | // } |
---|
1999 | // } |
---|
2000 | |
---|
2001 | // private: |
---|
2002 | |
---|
2003 | // EntryMap& entryMap; |
---|
2004 | // ExitMap& exitMap; |
---|
2005 | |
---|
2006 | // }; |
---|
2007 | |
---|
2008 | // template <typename EdgeMap, typename NodeMap> |
---|
2009 | // class CombinedEdgeMap : public MapBase<Edge, typename EdgeMap::Value> { |
---|
2010 | // public: |
---|
2011 | // typedef MapBase<Edge, typename EdgeMap::Value> Parent; |
---|
2012 | |
---|
2013 | // typedef typename Parent::Key Key; |
---|
2014 | // typedef typename Parent::Value Value; |
---|
2015 | |
---|
2016 | // CombinedEdgeMap(EdgeMap& _edgeMap, NodeMap& _nodeMap) |
---|
2017 | // : edgeMap(_edgeMap), nodeMap(_nodeMap) {} |
---|
2018 | |
---|
2019 | // void set(const Edge& edge, const Value& val) { |
---|
2020 | // if (SplitGraphAdaptorBase::originalEdge(edge)) { |
---|
2021 | // edgeMap.set(edge, val); |
---|
2022 | // } else { |
---|
2023 | // nodeMap.set(SplitGraphAdaptorBase::bindedNode(edge), val); |
---|
2024 | // } |
---|
2025 | // } |
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2026 | |
---|
2027 | // Value operator[](const Key& edge) const { |
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2028 | // if (SplitGraphAdaptorBase::originalEdge(edge)) { |
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2029 | // return edgeMap[edge]; |
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2030 | // } else { |
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2031 | // return nodeMap[SplitGraphAdaptorBase::bindedNode(edge)]; |
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2032 | // } |
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2033 | // } |
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2034 | |
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2035 | // Value& operator[](const Key& edge) { |
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2036 | // if (SplitGraphAdaptorBase::originalEdge(edge)) { |
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2037 | // return edgeMap[edge]; |
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2038 | // } else { |
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2039 | // return nodeMap[SplitGraphAdaptorBase::bindedNode(edge)]; |
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2040 | // } |
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2041 | // } |
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2042 | |
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2043 | // private: |
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2044 | // EdgeMap& edgeMap; |
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2045 | // NodeMap& nodeMap; |
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2046 | // }; |
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2047 | |
---|
2048 | // }; |
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2049 | |
---|
2050 | // template <typename _Graph> |
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2051 | // class SplitGraphAdaptor |
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2052 | // : public GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > { |
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2053 | // public: |
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2054 | // typedef GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > Parent; |
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2055 | |
---|
2056 | // SplitGraphAdaptor(_Graph& graph) { |
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2057 | // Parent::setGraph(graph); |
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2058 | // } |
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2059 | |
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2060 | |
---|
2061 | // }; |
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2062 | |
---|
2063 | } //namespace lemon |
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2064 | |
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2065 | #endif //LEMON_GRAPH_ADAPTOR_H |
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2066 | |
---|