1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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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) 2003-2009 |
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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_BITS_GRAPH_EXTENDER_H |
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20 | #define LEMON_BITS_GRAPH_EXTENDER_H |
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21 | |
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22 | #include <lemon/core.h> |
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23 | |
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24 | #include <lemon/bits/map_extender.h> |
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25 | #include <lemon/bits/default_map.h> |
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26 | |
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27 | #include <lemon/concept_check.h> |
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28 | #include <lemon/concepts/maps.h> |
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29 | |
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30 | //\ingroup graphbits |
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31 | //\file |
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32 | //\brief Extenders for the graph types |
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33 | namespace lemon { |
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34 | |
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35 | // \ingroup graphbits |
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36 | // |
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37 | // \brief Extender for the digraph implementations |
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38 | template <typename Base> |
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39 | class DigraphExtender : public Base { |
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40 | typedef Base Parent; |
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41 | |
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42 | public: |
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43 | |
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44 | typedef DigraphExtender Digraph; |
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45 | |
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46 | // Base extensions |
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47 | |
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48 | typedef typename Parent::Node Node; |
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49 | typedef typename Parent::Arc Arc; |
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50 | |
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51 | int maxId(Node) const { |
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52 | return Parent::maxNodeId(); |
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53 | } |
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54 | |
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55 | int maxId(Arc) const { |
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56 | return Parent::maxArcId(); |
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57 | } |
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58 | |
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59 | static Node fromId(int id, Node) { |
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60 | return Parent::nodeFromId(id); |
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61 | } |
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62 | |
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63 | static Arc fromId(int id, Arc) { |
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64 | return Parent::arcFromId(id); |
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65 | } |
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66 | |
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67 | Node oppositeNode(const Node &node, const Arc &arc) const { |
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68 | if (node == Parent::source(arc)) |
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69 | return Parent::target(arc); |
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70 | else if(node == Parent::target(arc)) |
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71 | return Parent::source(arc); |
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72 | else |
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73 | return INVALID; |
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74 | } |
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75 | |
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76 | // Alterable extension |
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77 | |
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78 | typedef AlterationNotifier<DigraphExtender, Node> NodeNotifier; |
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79 | typedef AlterationNotifier<DigraphExtender, Arc> ArcNotifier; |
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80 | |
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81 | |
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82 | protected: |
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83 | |
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84 | mutable NodeNotifier node_notifier; |
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85 | mutable ArcNotifier arc_notifier; |
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86 | |
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87 | public: |
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88 | |
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89 | NodeNotifier& notifier(Node) const { |
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90 | return node_notifier; |
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91 | } |
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92 | |
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93 | ArcNotifier& notifier(Arc) const { |
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94 | return arc_notifier; |
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95 | } |
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96 | |
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97 | class NodeIt : public Node { |
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98 | const Digraph* _digraph; |
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99 | public: |
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100 | |
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101 | NodeIt() {} |
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102 | |
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103 | NodeIt(Invalid i) : Node(i) { } |
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104 | |
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105 | explicit NodeIt(const Digraph& digraph) : _digraph(&digraph) { |
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106 | _digraph->first(static_cast<Node&>(*this)); |
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107 | } |
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108 | |
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109 | NodeIt(const Digraph& digraph, const Node& node) |
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110 | : Node(node), _digraph(&digraph) {} |
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111 | |
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112 | NodeIt& operator++() { |
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113 | _digraph->next(*this); |
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114 | return *this; |
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115 | } |
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116 | |
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117 | }; |
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118 | |
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119 | |
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120 | class ArcIt : public Arc { |
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121 | const Digraph* _digraph; |
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122 | public: |
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123 | |
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124 | ArcIt() { } |
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125 | |
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126 | ArcIt(Invalid i) : Arc(i) { } |
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127 | |
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128 | explicit ArcIt(const Digraph& digraph) : _digraph(&digraph) { |
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129 | _digraph->first(static_cast<Arc&>(*this)); |
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130 | } |
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131 | |
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132 | ArcIt(const Digraph& digraph, const Arc& arc) : |
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133 | Arc(arc), _digraph(&digraph) { } |
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134 | |
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135 | ArcIt& operator++() { |
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136 | _digraph->next(*this); |
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137 | return *this; |
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138 | } |
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139 | |
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140 | }; |
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141 | |
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142 | |
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143 | class OutArcIt : public Arc { |
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144 | const Digraph* _digraph; |
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145 | public: |
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146 | |
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147 | OutArcIt() { } |
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148 | |
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149 | OutArcIt(Invalid i) : Arc(i) { } |
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150 | |
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151 | OutArcIt(const Digraph& digraph, const Node& node) |
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152 | : _digraph(&digraph) { |
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153 | _digraph->firstOut(*this, node); |
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154 | } |
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155 | |
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156 | OutArcIt(const Digraph& digraph, const Arc& arc) |
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157 | : Arc(arc), _digraph(&digraph) {} |
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158 | |
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159 | OutArcIt& operator++() { |
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160 | _digraph->nextOut(*this); |
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161 | return *this; |
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162 | } |
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163 | |
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164 | }; |
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165 | |
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166 | |
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167 | class InArcIt : public Arc { |
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168 | const Digraph* _digraph; |
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169 | public: |
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170 | |
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171 | InArcIt() { } |
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172 | |
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173 | InArcIt(Invalid i) : Arc(i) { } |
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174 | |
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175 | InArcIt(const Digraph& digraph, const Node& node) |
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176 | : _digraph(&digraph) { |
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177 | _digraph->firstIn(*this, node); |
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178 | } |
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179 | |
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180 | InArcIt(const Digraph& digraph, const Arc& arc) : |
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181 | Arc(arc), _digraph(&digraph) {} |
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182 | |
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183 | InArcIt& operator++() { |
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184 | _digraph->nextIn(*this); |
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185 | return *this; |
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186 | } |
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187 | |
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188 | }; |
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189 | |
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190 | // \brief Base node of the iterator |
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191 | // |
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192 | // Returns the base node (i.e. the source in this case) of the iterator |
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193 | Node baseNode(const OutArcIt &arc) const { |
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194 | return Parent::source(arc); |
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195 | } |
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196 | // \brief Running node of the iterator |
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197 | // |
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198 | // Returns the running node (i.e. the target in this case) of the |
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199 | // iterator |
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200 | Node runningNode(const OutArcIt &arc) const { |
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201 | return Parent::target(arc); |
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202 | } |
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203 | |
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204 | // \brief Base node of the iterator |
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205 | // |
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206 | // Returns the base node (i.e. the target in this case) of the iterator |
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207 | Node baseNode(const InArcIt &arc) const { |
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208 | return Parent::target(arc); |
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209 | } |
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210 | // \brief Running node of the iterator |
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211 | // |
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212 | // Returns the running node (i.e. the source in this case) of the |
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213 | // iterator |
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214 | Node runningNode(const InArcIt &arc) const { |
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215 | return Parent::source(arc); |
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216 | } |
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217 | |
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218 | |
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219 | template <typename _Value> |
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220 | class NodeMap |
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221 | : public MapExtender<DefaultMap<Digraph, Node, _Value> > { |
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222 | typedef MapExtender<DefaultMap<Digraph, Node, _Value> > Parent; |
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223 | |
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224 | public: |
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225 | explicit NodeMap(const Digraph& digraph) |
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226 | : Parent(digraph) {} |
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227 | NodeMap(const Digraph& digraph, const _Value& value) |
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228 | : Parent(digraph, value) {} |
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229 | |
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230 | private: |
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231 | NodeMap& operator=(const NodeMap& cmap) { |
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232 | return operator=<NodeMap>(cmap); |
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233 | } |
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234 | |
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235 | template <typename CMap> |
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236 | NodeMap& operator=(const CMap& cmap) { |
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237 | Parent::operator=(cmap); |
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238 | return *this; |
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239 | } |
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240 | |
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241 | }; |
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242 | |
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243 | template <typename _Value> |
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244 | class ArcMap |
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245 | : public MapExtender<DefaultMap<Digraph, Arc, _Value> > { |
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246 | typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent; |
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247 | |
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248 | public: |
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249 | explicit ArcMap(const Digraph& digraph) |
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250 | : Parent(digraph) {} |
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251 | ArcMap(const Digraph& digraph, const _Value& value) |
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252 | : Parent(digraph, value) {} |
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253 | |
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254 | private: |
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255 | ArcMap& operator=(const ArcMap& cmap) { |
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256 | return operator=<ArcMap>(cmap); |
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257 | } |
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258 | |
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259 | template <typename CMap> |
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260 | ArcMap& operator=(const CMap& cmap) { |
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261 | Parent::operator=(cmap); |
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262 | return *this; |
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263 | } |
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264 | }; |
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265 | |
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266 | |
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267 | Node addNode() { |
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268 | Node node = Parent::addNode(); |
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269 | notifier(Node()).add(node); |
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270 | return node; |
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271 | } |
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272 | |
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273 | Arc addArc(const Node& from, const Node& to) { |
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274 | Arc arc = Parent::addArc(from, to); |
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275 | notifier(Arc()).add(arc); |
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276 | return arc; |
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277 | } |
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278 | |
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279 | void clear() { |
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280 | notifier(Arc()).clear(); |
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281 | notifier(Node()).clear(); |
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282 | Parent::clear(); |
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283 | } |
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284 | |
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285 | template <typename Digraph, typename NodeRefMap, typename ArcRefMap> |
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286 | void build(const Digraph& digraph, NodeRefMap& nodeRef, ArcRefMap& arcRef) { |
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287 | Parent::build(digraph, nodeRef, arcRef); |
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288 | notifier(Node()).build(); |
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289 | notifier(Arc()).build(); |
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290 | } |
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291 | |
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292 | void erase(const Node& node) { |
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293 | Arc arc; |
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294 | Parent::firstOut(arc, node); |
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295 | while (arc != INVALID ) { |
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296 | erase(arc); |
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297 | Parent::firstOut(arc, node); |
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298 | } |
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299 | |
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300 | Parent::firstIn(arc, node); |
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301 | while (arc != INVALID ) { |
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302 | erase(arc); |
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303 | Parent::firstIn(arc, node); |
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304 | } |
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305 | |
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306 | notifier(Node()).erase(node); |
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307 | Parent::erase(node); |
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308 | } |
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309 | |
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310 | void erase(const Arc& arc) { |
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311 | notifier(Arc()).erase(arc); |
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312 | Parent::erase(arc); |
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313 | } |
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314 | |
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315 | DigraphExtender() { |
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316 | node_notifier.setContainer(*this); |
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317 | arc_notifier.setContainer(*this); |
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318 | } |
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319 | |
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320 | |
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321 | ~DigraphExtender() { |
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322 | arc_notifier.clear(); |
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323 | node_notifier.clear(); |
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324 | } |
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325 | }; |
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326 | |
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327 | // \ingroup _graphbits |
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328 | // |
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329 | // \brief Extender for the Graphs |
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330 | template <typename Base> |
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331 | class GraphExtender : public Base { |
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332 | typedef Base Parent; |
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333 | |
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334 | public: |
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335 | |
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336 | typedef GraphExtender Graph; |
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337 | |
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338 | typedef True UndirectedTag; |
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339 | |
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340 | typedef typename Parent::Node Node; |
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341 | typedef typename Parent::Arc Arc; |
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342 | typedef typename Parent::Edge Edge; |
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343 | |
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344 | // Graph extension |
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345 | |
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346 | int maxId(Node) const { |
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347 | return Parent::maxNodeId(); |
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348 | } |
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349 | |
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350 | int maxId(Arc) const { |
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351 | return Parent::maxArcId(); |
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352 | } |
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353 | |
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354 | int maxId(Edge) const { |
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355 | return Parent::maxEdgeId(); |
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356 | } |
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357 | |
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358 | static Node fromId(int id, Node) { |
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359 | return Parent::nodeFromId(id); |
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360 | } |
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361 | |
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362 | static Arc fromId(int id, Arc) { |
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363 | return Parent::arcFromId(id); |
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364 | } |
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365 | |
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366 | static Edge fromId(int id, Edge) { |
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367 | return Parent::edgeFromId(id); |
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368 | } |
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369 | |
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370 | Node oppositeNode(const Node &n, const Edge &e) const { |
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371 | if( n == Parent::u(e)) |
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372 | return Parent::v(e); |
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373 | else if( n == Parent::v(e)) |
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374 | return Parent::u(e); |
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375 | else |
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376 | return INVALID; |
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377 | } |
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378 | |
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379 | Arc oppositeArc(const Arc &arc) const { |
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380 | return Parent::direct(arc, !Parent::direction(arc)); |
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381 | } |
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382 | |
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383 | using Parent::direct; |
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384 | Arc direct(const Edge &edge, const Node &node) const { |
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385 | return Parent::direct(edge, Parent::u(edge) == node); |
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386 | } |
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387 | |
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388 | // Alterable extension |
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389 | |
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390 | typedef AlterationNotifier<GraphExtender, Node> NodeNotifier; |
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391 | typedef AlterationNotifier<GraphExtender, Arc> ArcNotifier; |
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392 | typedef AlterationNotifier<GraphExtender, Edge> EdgeNotifier; |
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393 | |
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394 | |
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395 | protected: |
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396 | |
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397 | mutable NodeNotifier node_notifier; |
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398 | mutable ArcNotifier arc_notifier; |
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399 | mutable EdgeNotifier edge_notifier; |
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400 | |
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401 | public: |
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402 | |
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403 | NodeNotifier& notifier(Node) const { |
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404 | return node_notifier; |
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405 | } |
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406 | |
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407 | ArcNotifier& notifier(Arc) const { |
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408 | return arc_notifier; |
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409 | } |
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410 | |
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411 | EdgeNotifier& notifier(Edge) const { |
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412 | return edge_notifier; |
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413 | } |
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414 | |
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415 | |
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416 | |
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417 | class NodeIt : public Node { |
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418 | const Graph* _graph; |
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419 | public: |
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420 | |
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421 | NodeIt() {} |
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422 | |
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423 | NodeIt(Invalid i) : Node(i) { } |
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424 | |
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425 | explicit NodeIt(const Graph& graph) : _graph(&graph) { |
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426 | _graph->first(static_cast<Node&>(*this)); |
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427 | } |
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428 | |
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429 | NodeIt(const Graph& graph, const Node& node) |
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430 | : Node(node), _graph(&graph) {} |
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431 | |
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432 | NodeIt& operator++() { |
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433 | _graph->next(*this); |
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434 | return *this; |
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435 | } |
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436 | |
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437 | }; |
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438 | |
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439 | |
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440 | class ArcIt : public Arc { |
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441 | const Graph* _graph; |
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442 | public: |
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443 | |
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444 | ArcIt() { } |
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445 | |
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446 | ArcIt(Invalid i) : Arc(i) { } |
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447 | |
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448 | explicit ArcIt(const Graph& graph) : _graph(&graph) { |
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449 | _graph->first(static_cast<Arc&>(*this)); |
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450 | } |
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451 | |
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452 | ArcIt(const Graph& graph, const Arc& arc) : |
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453 | Arc(arc), _graph(&graph) { } |
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454 | |
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455 | ArcIt& operator++() { |
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456 | _graph->next(*this); |
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457 | return *this; |
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458 | } |
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459 | |
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460 | }; |
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461 | |
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462 | |
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463 | class OutArcIt : public Arc { |
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464 | const Graph* _graph; |
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465 | public: |
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466 | |
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467 | OutArcIt() { } |
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468 | |
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469 | OutArcIt(Invalid i) : Arc(i) { } |
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470 | |
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471 | OutArcIt(const Graph& graph, const Node& node) |
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472 | : _graph(&graph) { |
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473 | _graph->firstOut(*this, node); |
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474 | } |
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475 | |
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476 | OutArcIt(const Graph& graph, const Arc& arc) |
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477 | : Arc(arc), _graph(&graph) {} |
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478 | |
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479 | OutArcIt& operator++() { |
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480 | _graph->nextOut(*this); |
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481 | return *this; |
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482 | } |
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483 | |
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484 | }; |
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485 | |
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486 | |
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487 | class InArcIt : public Arc { |
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488 | const Graph* _graph; |
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489 | public: |
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490 | |
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491 | InArcIt() { } |
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492 | |
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493 | InArcIt(Invalid i) : Arc(i) { } |
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494 | |
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495 | InArcIt(const Graph& graph, const Node& node) |
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496 | : _graph(&graph) { |
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497 | _graph->firstIn(*this, node); |
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498 | } |
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499 | |
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500 | InArcIt(const Graph& graph, const Arc& arc) : |
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501 | Arc(arc), _graph(&graph) {} |
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502 | |
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503 | InArcIt& operator++() { |
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504 | _graph->nextIn(*this); |
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505 | return *this; |
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506 | } |
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507 | |
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508 | }; |
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509 | |
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510 | |
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511 | class EdgeIt : public Parent::Edge { |
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512 | const Graph* _graph; |
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513 | public: |
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514 | |
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515 | EdgeIt() { } |
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516 | |
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517 | EdgeIt(Invalid i) : Edge(i) { } |
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518 | |
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519 | explicit EdgeIt(const Graph& graph) : _graph(&graph) { |
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520 | _graph->first(static_cast<Edge&>(*this)); |
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521 | } |
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522 | |
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523 | EdgeIt(const Graph& graph, const Edge& edge) : |
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524 | Edge(edge), _graph(&graph) { } |
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525 | |
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526 | EdgeIt& operator++() { |
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527 | _graph->next(*this); |
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528 | return *this; |
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529 | } |
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530 | |
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531 | }; |
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532 | |
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533 | class IncEdgeIt : public Parent::Edge { |
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534 | friend class GraphExtender; |
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535 | const Graph* _graph; |
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536 | bool _direction; |
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537 | public: |
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538 | |
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539 | IncEdgeIt() { } |
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540 | |
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541 | IncEdgeIt(Invalid i) : Edge(i), _direction(false) { } |
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542 | |
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543 | IncEdgeIt(const Graph& graph, const Node &node) : _graph(&graph) { |
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544 | _graph->firstInc(*this, _direction, node); |
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545 | } |
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546 | |
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547 | IncEdgeIt(const Graph& graph, const Edge &edge, const Node &node) |
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548 | : _graph(&graph), Edge(edge) { |
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549 | _direction = (_graph->source(edge) == node); |
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550 | } |
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551 | |
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552 | IncEdgeIt& operator++() { |
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553 | _graph->nextInc(*this, _direction); |
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554 | return *this; |
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555 | } |
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556 | }; |
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557 | |
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558 | // \brief Base node of the iterator |
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559 | // |
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560 | // Returns the base node (ie. the source in this case) of the iterator |
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561 | Node baseNode(const OutArcIt &arc) const { |
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562 | return Parent::source(static_cast<const Arc&>(arc)); |
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563 | } |
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564 | // \brief Running node of the iterator |
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565 | // |
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566 | // Returns the running node (ie. the target in this case) of the |
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567 | // iterator |
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568 | Node runningNode(const OutArcIt &arc) const { |
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569 | return Parent::target(static_cast<const Arc&>(arc)); |
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570 | } |
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571 | |
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572 | // \brief Base node of the iterator |
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573 | // |
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574 | // Returns the base node (ie. the target in this case) of the iterator |
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575 | Node baseNode(const InArcIt &arc) const { |
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576 | return Parent::target(static_cast<const Arc&>(arc)); |
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577 | } |
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578 | // \brief Running node of the iterator |
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579 | // |
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580 | // Returns the running node (ie. the source in this case) of the |
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581 | // iterator |
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582 | Node runningNode(const InArcIt &arc) const { |
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583 | return Parent::source(static_cast<const Arc&>(arc)); |
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584 | } |
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585 | |
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586 | // Base node of the iterator |
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587 | // |
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588 | // Returns the base node of the iterator |
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589 | Node baseNode(const IncEdgeIt &edge) const { |
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590 | return edge._direction ? this->u(edge) : this->v(edge); |
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591 | } |
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592 | // Running node of the iterator |
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593 | // |
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594 | // Returns the running node of the iterator |
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595 | Node runningNode(const IncEdgeIt &edge) const { |
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596 | return edge._direction ? this->v(edge) : this->u(edge); |
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597 | } |
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598 | |
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599 | // Mappable extension |
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600 | |
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601 | template <typename _Value> |
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602 | class NodeMap |
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603 | : public MapExtender<DefaultMap<Graph, Node, _Value> > { |
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604 | typedef MapExtender<DefaultMap<Graph, Node, _Value> > Parent; |
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605 | |
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606 | public: |
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607 | explicit NodeMap(const Graph& graph) |
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608 | : Parent(graph) {} |
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609 | NodeMap(const Graph& graph, const _Value& value) |
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610 | : Parent(graph, value) {} |
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611 | |
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612 | private: |
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613 | NodeMap& operator=(const NodeMap& cmap) { |
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614 | return operator=<NodeMap>(cmap); |
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615 | } |
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616 | |
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617 | template <typename CMap> |
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618 | NodeMap& operator=(const CMap& cmap) { |
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619 | Parent::operator=(cmap); |
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620 | return *this; |
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621 | } |
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622 | |
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623 | }; |
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624 | |
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625 | template <typename _Value> |
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626 | class ArcMap |
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627 | : public MapExtender<DefaultMap<Graph, Arc, _Value> > { |
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628 | typedef MapExtender<DefaultMap<Graph, Arc, _Value> > Parent; |
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629 | |
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630 | public: |
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631 | explicit ArcMap(const Graph& graph) |
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632 | : Parent(graph) {} |
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633 | ArcMap(const Graph& graph, const _Value& value) |
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634 | : Parent(graph, value) {} |
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635 | |
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636 | private: |
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637 | ArcMap& operator=(const ArcMap& cmap) { |
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638 | return operator=<ArcMap>(cmap); |
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639 | } |
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640 | |
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641 | template <typename CMap> |
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642 | ArcMap& operator=(const CMap& cmap) { |
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643 | Parent::operator=(cmap); |
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644 | return *this; |
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645 | } |
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646 | }; |
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647 | |
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648 | |
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649 | template <typename _Value> |
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650 | class EdgeMap |
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651 | : public MapExtender<DefaultMap<Graph, Edge, _Value> > { |
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652 | typedef MapExtender<DefaultMap<Graph, Edge, _Value> > Parent; |
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653 | |
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654 | public: |
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655 | explicit EdgeMap(const Graph& graph) |
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656 | : Parent(graph) {} |
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657 | |
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658 | EdgeMap(const Graph& graph, const _Value& value) |
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659 | : Parent(graph, value) {} |
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660 | |
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661 | private: |
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662 | EdgeMap& operator=(const EdgeMap& cmap) { |
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663 | return operator=<EdgeMap>(cmap); |
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664 | } |
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665 | |
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666 | template <typename CMap> |
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667 | EdgeMap& operator=(const CMap& cmap) { |
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668 | Parent::operator=(cmap); |
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669 | return *this; |
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670 | } |
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671 | |
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672 | }; |
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673 | |
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674 | // Alteration extension |
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675 | |
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676 | Node addNode() { |
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677 | Node node = Parent::addNode(); |
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678 | notifier(Node()).add(node); |
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679 | return node; |
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680 | } |
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681 | |
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682 | Edge addEdge(const Node& from, const Node& to) { |
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683 | Edge edge = Parent::addEdge(from, to); |
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684 | notifier(Edge()).add(edge); |
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685 | std::vector<Arc> ev; |
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686 | ev.push_back(Parent::direct(edge, true)); |
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687 | ev.push_back(Parent::direct(edge, false)); |
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688 | notifier(Arc()).add(ev); |
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689 | return edge; |
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690 | } |
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691 | |
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692 | void clear() { |
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693 | notifier(Arc()).clear(); |
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694 | notifier(Edge()).clear(); |
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695 | notifier(Node()).clear(); |
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696 | Parent::clear(); |
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697 | } |
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698 | |
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699 | template <typename Graph, typename NodeRefMap, typename EdgeRefMap> |
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700 | void build(const Graph& graph, NodeRefMap& nodeRef, |
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701 | EdgeRefMap& edgeRef) { |
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702 | Parent::build(graph, nodeRef, edgeRef); |
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703 | notifier(Node()).build(); |
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704 | notifier(Edge()).build(); |
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705 | notifier(Arc()).build(); |
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706 | } |
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707 | |
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708 | void erase(const Node& node) { |
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709 | Arc arc; |
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710 | Parent::firstOut(arc, node); |
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711 | while (arc != INVALID ) { |
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712 | erase(arc); |
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713 | Parent::firstOut(arc, node); |
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714 | } |
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715 | |
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716 | Parent::firstIn(arc, node); |
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717 | while (arc != INVALID ) { |
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718 | erase(arc); |
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719 | Parent::firstIn(arc, node); |
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720 | } |
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721 | |
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722 | notifier(Node()).erase(node); |
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723 | Parent::erase(node); |
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724 | } |
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725 | |
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726 | void erase(const Edge& edge) { |
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727 | std::vector<Arc> av; |
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728 | av.push_back(Parent::direct(edge, true)); |
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729 | av.push_back(Parent::direct(edge, false)); |
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730 | notifier(Arc()).erase(av); |
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731 | notifier(Edge()).erase(edge); |
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732 | Parent::erase(edge); |
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733 | } |
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734 | |
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735 | GraphExtender() { |
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736 | node_notifier.setContainer(*this); |
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737 | arc_notifier.setContainer(*this); |
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738 | edge_notifier.setContainer(*this); |
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739 | } |
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740 | |
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741 | ~GraphExtender() { |
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742 | edge_notifier.clear(); |
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743 | arc_notifier.clear(); |
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744 | node_notifier.clear(); |
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745 | } |
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746 | |
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747 | }; |
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748 | |
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749 | } |
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750 | |
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751 | #endif |
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