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) 2003-2008 |
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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_EDGE_SET_EXTENDER_H |
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20 | #define LEMON_BITS_EDGE_SET_EXTENDER_H |
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21 | |
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22 | #include <lemon/core.h> |
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23 | #include <lemon/error.h> |
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24 | #include <lemon/bits/default_map.h> |
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25 | #include <lemon/bits/map_extender.h> |
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26 | |
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27 | ///\ingroup digraphbits |
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28 | ///\file |
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29 | ///\brief Extenders for the arc set types |
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30 | namespace lemon { |
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31 | |
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32 | /// \ingroup digraphbits |
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33 | /// |
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34 | /// \brief Extender for the ArcSets |
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35 | template <typename Base> |
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36 | class ArcSetExtender : public Base { |
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37 | public: |
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38 | |
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39 | typedef Base Parent; |
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40 | typedef ArcSetExtender Digraph; |
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41 | |
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42 | // Base extensions |
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43 | |
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44 | typedef typename Parent::Node Node; |
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45 | typedef typename Parent::Arc Arc; |
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46 | |
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47 | int maxId(Node) const { |
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48 | return Parent::maxNodeId(); |
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49 | } |
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50 | |
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51 | int maxId(Arc) const { |
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52 | return Parent::maxArcId(); |
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53 | } |
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54 | |
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55 | Node fromId(int id, Node) const { |
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56 | return Parent::nodeFromId(id); |
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57 | } |
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58 | |
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59 | Arc fromId(int id, Arc) const { |
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60 | return Parent::arcFromId(id); |
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61 | } |
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62 | |
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63 | Node oppositeNode(const Node &n, const Arc &e) const { |
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64 | if (n == Parent::source(e)) |
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65 | return Parent::target(e); |
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66 | else if(n==Parent::target(e)) |
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67 | return Parent::source(e); |
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68 | else |
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69 | return INVALID; |
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70 | } |
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71 | |
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72 | |
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73 | // Alteration notifier extensions |
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74 | |
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75 | /// The arc observer registry. |
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76 | typedef AlterationNotifier<ArcSetExtender, Arc> ArcNotifier; |
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77 | |
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78 | protected: |
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79 | |
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80 | mutable ArcNotifier arc_notifier; |
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81 | |
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82 | public: |
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83 | |
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84 | using Parent::notifier; |
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85 | |
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86 | /// \brief Gives back the arc alteration notifier. |
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87 | /// |
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88 | /// Gives back the arc alteration notifier. |
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89 | ArcNotifier& notifier(Arc) const { |
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90 | return arc_notifier; |
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91 | } |
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92 | |
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93 | // Iterable extensions |
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94 | |
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95 | class NodeIt : public Node { |
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96 | const Digraph* digraph; |
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97 | public: |
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98 | |
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99 | NodeIt() {} |
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100 | |
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101 | NodeIt(Invalid i) : Node(i) { } |
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102 | |
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103 | explicit NodeIt(const Digraph& _graph) : digraph(&_graph) { |
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104 | _graph.first(static_cast<Node&>(*this)); |
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105 | } |
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106 | |
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107 | NodeIt(const Digraph& _graph, const Node& node) |
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108 | : Node(node), digraph(&_graph) {} |
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109 | |
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110 | NodeIt& operator++() { |
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111 | digraph->next(*this); |
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112 | return *this; |
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113 | } |
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114 | |
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115 | }; |
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116 | |
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117 | |
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118 | class ArcIt : public Arc { |
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119 | const Digraph* digraph; |
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120 | public: |
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121 | |
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122 | ArcIt() { } |
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123 | |
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124 | ArcIt(Invalid i) : Arc(i) { } |
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125 | |
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126 | explicit ArcIt(const Digraph& _graph) : digraph(&_graph) { |
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127 | _graph.first(static_cast<Arc&>(*this)); |
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128 | } |
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129 | |
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130 | ArcIt(const Digraph& _graph, const Arc& e) : |
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131 | Arc(e), digraph(&_graph) { } |
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132 | |
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133 | ArcIt& operator++() { |
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134 | digraph->next(*this); |
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135 | return *this; |
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136 | } |
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137 | |
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138 | }; |
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139 | |
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140 | |
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141 | class OutArcIt : public Arc { |
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142 | const Digraph* digraph; |
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143 | public: |
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144 | |
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145 | OutArcIt() { } |
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146 | |
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147 | OutArcIt(Invalid i) : Arc(i) { } |
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148 | |
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149 | OutArcIt(const Digraph& _graph, const Node& node) |
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150 | : digraph(&_graph) { |
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151 | _graph.firstOut(*this, node); |
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152 | } |
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153 | |
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154 | OutArcIt(const Digraph& _graph, const Arc& arc) |
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155 | : Arc(arc), digraph(&_graph) {} |
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156 | |
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157 | OutArcIt& operator++() { |
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158 | digraph->nextOut(*this); |
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159 | return *this; |
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160 | } |
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161 | |
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162 | }; |
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163 | |
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164 | |
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165 | class InArcIt : public Arc { |
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166 | const Digraph* digraph; |
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167 | public: |
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168 | |
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169 | InArcIt() { } |
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170 | |
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171 | InArcIt(Invalid i) : Arc(i) { } |
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172 | |
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173 | InArcIt(const Digraph& _graph, const Node& node) |
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174 | : digraph(&_graph) { |
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175 | _graph.firstIn(*this, node); |
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176 | } |
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177 | |
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178 | InArcIt(const Digraph& _graph, const Arc& arc) : |
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179 | Arc(arc), digraph(&_graph) {} |
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180 | |
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181 | InArcIt& operator++() { |
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182 | digraph->nextIn(*this); |
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183 | return *this; |
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184 | } |
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185 | |
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186 | }; |
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187 | |
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188 | /// \brief Base node of the iterator |
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189 | /// |
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190 | /// Returns the base node (ie. the source in this case) of the iterator |
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191 | Node baseNode(const OutArcIt &e) const { |
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192 | return Parent::source(static_cast<const Arc&>(e)); |
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193 | } |
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194 | /// \brief Running node of the iterator |
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195 | /// |
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196 | /// Returns the running node (ie. the target in this case) of the |
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197 | /// iterator |
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198 | Node runningNode(const OutArcIt &e) const { |
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199 | return Parent::target(static_cast<const Arc&>(e)); |
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200 | } |
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201 | |
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202 | /// \brief Base node of the iterator |
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203 | /// |
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204 | /// Returns the base node (ie. the target in this case) of the iterator |
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205 | Node baseNode(const InArcIt &e) const { |
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206 | return Parent::target(static_cast<const Arc&>(e)); |
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207 | } |
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208 | /// \brief Running node of the iterator |
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209 | /// |
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210 | /// Returns the running node (ie. the source in this case) of the |
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211 | /// iterator |
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212 | Node runningNode(const InArcIt &e) const { |
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213 | return Parent::source(static_cast<const Arc&>(e)); |
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214 | } |
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215 | |
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216 | using Parent::first; |
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217 | |
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218 | // Mappable extension |
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219 | |
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220 | template <typename _Value> |
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221 | class ArcMap |
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222 | : public MapExtender<DefaultMap<Digraph, Arc, _Value> > { |
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223 | public: |
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224 | typedef ArcSetExtender Digraph; |
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225 | typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent; |
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226 | |
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227 | explicit ArcMap(const Digraph& _g) |
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228 | : Parent(_g) {} |
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229 | ArcMap(const Digraph& _g, const _Value& _v) |
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230 | : Parent(_g, _v) {} |
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231 | |
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232 | ArcMap& operator=(const ArcMap& cmap) { |
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233 | return operator=<ArcMap>(cmap); |
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234 | } |
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235 | |
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236 | template <typename CMap> |
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237 | ArcMap& operator=(const CMap& cmap) { |
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238 | Parent::operator=(cmap); |
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239 | return *this; |
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240 | } |
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241 | |
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242 | }; |
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243 | |
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244 | |
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245 | // Alteration extension |
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246 | |
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247 | Arc addArc(const Node& from, const Node& to) { |
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248 | Arc arc = Parent::addArc(from, to); |
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249 | notifier(Arc()).add(arc); |
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250 | return arc; |
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251 | } |
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252 | |
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253 | void clear() { |
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254 | notifier(Arc()).clear(); |
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255 | Parent::clear(); |
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256 | } |
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257 | |
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258 | void erase(const Arc& arc) { |
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259 | notifier(Arc()).erase(arc); |
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260 | Parent::erase(arc); |
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261 | } |
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262 | |
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263 | ArcSetExtender() { |
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264 | arc_notifier.setContainer(*this); |
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265 | } |
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266 | |
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267 | ~ArcSetExtender() { |
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268 | arc_notifier.clear(); |
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269 | } |
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270 | |
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271 | }; |
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272 | |
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273 | |
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274 | /// \ingroup digraphbits |
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275 | /// |
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276 | /// \brief Extender for the EdgeSets |
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277 | template <typename Base> |
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278 | class EdgeSetExtender : public Base { |
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279 | |
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280 | public: |
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281 | |
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282 | typedef Base Parent; |
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283 | typedef EdgeSetExtender Digraph; |
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284 | |
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285 | typedef typename Parent::Node Node; |
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286 | typedef typename Parent::Arc Arc; |
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287 | typedef typename Parent::Edge Edge; |
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288 | |
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289 | |
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290 | int maxId(Node) const { |
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291 | return Parent::maxNodeId(); |
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292 | } |
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293 | |
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294 | int maxId(Arc) const { |
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295 | return Parent::maxArcId(); |
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296 | } |
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297 | |
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298 | int maxId(Edge) const { |
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299 | return Parent::maxEdgeId(); |
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300 | } |
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301 | |
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302 | Node fromId(int id, Node) const { |
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303 | return Parent::nodeFromId(id); |
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304 | } |
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305 | |
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306 | Arc fromId(int id, Arc) const { |
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307 | return Parent::arcFromId(id); |
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308 | } |
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309 | |
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310 | Edge fromId(int id, Edge) const { |
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311 | return Parent::edgeFromId(id); |
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312 | } |
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313 | |
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314 | Node oppositeNode(const Node &n, const Edge &e) const { |
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315 | if( n == Parent::u(e)) |
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316 | return Parent::v(e); |
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317 | else if( n == Parent::v(e)) |
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318 | return Parent::u(e); |
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319 | else |
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320 | return INVALID; |
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321 | } |
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322 | |
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323 | Arc oppositeArc(const Arc &e) const { |
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324 | return Parent::direct(e, !Parent::direction(e)); |
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325 | } |
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326 | |
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327 | using Parent::direct; |
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328 | Arc direct(const Edge &e, const Node &s) const { |
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329 | return Parent::direct(e, Parent::u(e) == s); |
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330 | } |
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331 | |
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332 | typedef AlterationNotifier<EdgeSetExtender, Arc> ArcNotifier; |
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333 | typedef AlterationNotifier<EdgeSetExtender, Edge> EdgeNotifier; |
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334 | |
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335 | |
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336 | protected: |
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337 | |
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338 | mutable ArcNotifier arc_notifier; |
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339 | mutable EdgeNotifier edge_notifier; |
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340 | |
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341 | public: |
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342 | |
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343 | using Parent::notifier; |
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344 | |
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345 | ArcNotifier& notifier(Arc) const { |
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346 | return arc_notifier; |
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347 | } |
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348 | |
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349 | EdgeNotifier& notifier(Edge) const { |
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350 | return edge_notifier; |
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351 | } |
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352 | |
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353 | |
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354 | class NodeIt : public Node { |
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355 | const Digraph* digraph; |
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356 | public: |
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357 | |
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358 | NodeIt() {} |
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359 | |
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360 | NodeIt(Invalid i) : Node(i) { } |
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361 | |
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362 | explicit NodeIt(const Digraph& _graph) : digraph(&_graph) { |
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363 | _graph.first(static_cast<Node&>(*this)); |
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364 | } |
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365 | |
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366 | NodeIt(const Digraph& _graph, const Node& node) |
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367 | : Node(node), digraph(&_graph) {} |
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368 | |
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369 | NodeIt& operator++() { |
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370 | digraph->next(*this); |
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371 | return *this; |
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372 | } |
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373 | |
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374 | }; |
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375 | |
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376 | |
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377 | class ArcIt : public Arc { |
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378 | const Digraph* digraph; |
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379 | public: |
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380 | |
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381 | ArcIt() { } |
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382 | |
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383 | ArcIt(Invalid i) : Arc(i) { } |
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384 | |
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385 | explicit ArcIt(const Digraph& _graph) : digraph(&_graph) { |
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386 | _graph.first(static_cast<Arc&>(*this)); |
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387 | } |
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388 | |
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389 | ArcIt(const Digraph& _graph, const Arc& e) : |
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390 | Arc(e), digraph(&_graph) { } |
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391 | |
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392 | ArcIt& operator++() { |
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393 | digraph->next(*this); |
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394 | return *this; |
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395 | } |
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396 | |
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397 | }; |
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398 | |
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399 | |
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400 | class OutArcIt : public Arc { |
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401 | const Digraph* digraph; |
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402 | public: |
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403 | |
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404 | OutArcIt() { } |
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405 | |
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406 | OutArcIt(Invalid i) : Arc(i) { } |
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407 | |
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408 | OutArcIt(const Digraph& _graph, const Node& node) |
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409 | : digraph(&_graph) { |
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410 | _graph.firstOut(*this, node); |
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411 | } |
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412 | |
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413 | OutArcIt(const Digraph& _graph, const Arc& arc) |
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414 | : Arc(arc), digraph(&_graph) {} |
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415 | |
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416 | OutArcIt& operator++() { |
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417 | digraph->nextOut(*this); |
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418 | return *this; |
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419 | } |
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420 | |
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421 | }; |
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422 | |
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423 | |
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424 | class InArcIt : public Arc { |
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425 | const Digraph* digraph; |
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426 | public: |
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427 | |
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428 | InArcIt() { } |
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429 | |
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430 | InArcIt(Invalid i) : Arc(i) { } |
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431 | |
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432 | InArcIt(const Digraph& _graph, const Node& node) |
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433 | : digraph(&_graph) { |
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434 | _graph.firstIn(*this, node); |
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435 | } |
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436 | |
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437 | InArcIt(const Digraph& _graph, const Arc& arc) : |
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438 | Arc(arc), digraph(&_graph) {} |
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439 | |
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440 | InArcIt& operator++() { |
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441 | digraph->nextIn(*this); |
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442 | return *this; |
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443 | } |
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444 | |
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445 | }; |
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446 | |
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447 | |
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448 | class EdgeIt : public Parent::Edge { |
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449 | const Digraph* digraph; |
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450 | public: |
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451 | |
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452 | EdgeIt() { } |
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453 | |
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454 | EdgeIt(Invalid i) : Edge(i) { } |
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455 | |
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456 | explicit EdgeIt(const Digraph& _graph) : digraph(&_graph) { |
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457 | _graph.first(static_cast<Edge&>(*this)); |
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458 | } |
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459 | |
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460 | EdgeIt(const Digraph& _graph, const Edge& e) : |
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461 | Edge(e), digraph(&_graph) { } |
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462 | |
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463 | EdgeIt& operator++() { |
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464 | digraph->next(*this); |
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465 | return *this; |
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466 | } |
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467 | |
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468 | }; |
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469 | |
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470 | class IncEdgeIt : public Parent::Edge { |
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471 | friend class EdgeSetExtender; |
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472 | const Digraph* digraph; |
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473 | bool direction; |
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474 | public: |
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475 | |
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476 | IncEdgeIt() { } |
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477 | |
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478 | IncEdgeIt(Invalid i) : Edge(i), direction(false) { } |
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479 | |
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480 | IncEdgeIt(const Digraph& _graph, const Node &n) : digraph(&_graph) { |
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481 | _graph.firstInc(*this, direction, n); |
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482 | } |
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483 | |
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484 | IncEdgeIt(const Digraph& _graph, const Edge &ue, const Node &n) |
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485 | : digraph(&_graph), Edge(ue) { |
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486 | direction = (_graph.source(ue) == n); |
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487 | } |
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488 | |
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489 | IncEdgeIt& operator++() { |
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490 | digraph->nextInc(*this, direction); |
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491 | return *this; |
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492 | } |
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493 | }; |
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494 | |
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495 | /// \brief Base node of the iterator |
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496 | /// |
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497 | /// Returns the base node (ie. the source in this case) of the iterator |
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498 | Node baseNode(const OutArcIt &e) const { |
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499 | return Parent::source(static_cast<const Arc&>(e)); |
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500 | } |
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501 | /// \brief Running node of the iterator |
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502 | /// |
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503 | /// Returns the running node (ie. the target in this case) of the |
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504 | /// iterator |
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505 | Node runningNode(const OutArcIt &e) const { |
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506 | return Parent::target(static_cast<const Arc&>(e)); |
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507 | } |
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508 | |
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509 | /// \brief Base node of the iterator |
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510 | /// |
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511 | /// Returns the base node (ie. the target in this case) of the iterator |
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512 | Node baseNode(const InArcIt &e) const { |
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513 | return Parent::target(static_cast<const Arc&>(e)); |
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514 | } |
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515 | /// \brief Running node of the iterator |
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516 | /// |
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517 | /// Returns the running node (ie. the source in this case) of the |
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518 | /// iterator |
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519 | Node runningNode(const InArcIt &e) const { |
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520 | return Parent::source(static_cast<const Arc&>(e)); |
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521 | } |
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522 | |
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523 | /// Base node of the iterator |
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524 | /// |
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525 | /// Returns the base node of the iterator |
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526 | Node baseNode(const IncEdgeIt &e) const { |
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527 | return e.direction ? u(e) : v(e); |
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528 | } |
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529 | /// Running node of the iterator |
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530 | /// |
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531 | /// Returns the running node of the iterator |
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532 | Node runningNode(const IncEdgeIt &e) const { |
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533 | return e.direction ? v(e) : u(e); |
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534 | } |
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535 | |
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536 | |
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537 | template <typename _Value> |
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538 | class ArcMap |
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539 | : public MapExtender<DefaultMap<Digraph, Arc, _Value> > { |
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540 | public: |
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541 | typedef EdgeSetExtender Digraph; |
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542 | typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent; |
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543 | |
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544 | ArcMap(const Digraph& _g) |
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545 | : Parent(_g) {} |
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546 | ArcMap(const Digraph& _g, const _Value& _v) |
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547 | : Parent(_g, _v) {} |
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548 | |
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549 | ArcMap& operator=(const ArcMap& cmap) { |
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550 | return operator=<ArcMap>(cmap); |
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551 | } |
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552 | |
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553 | template <typename CMap> |
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554 | ArcMap& operator=(const CMap& cmap) { |
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555 | Parent::operator=(cmap); |
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556 | return *this; |
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557 | } |
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558 | |
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559 | }; |
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560 | |
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561 | |
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562 | template <typename _Value> |
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563 | class EdgeMap |
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564 | : public MapExtender<DefaultMap<Digraph, Edge, _Value> > { |
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565 | public: |
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566 | typedef EdgeSetExtender Digraph; |
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567 | typedef MapExtender<DefaultMap<Digraph, Edge, _Value> > Parent; |
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568 | |
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569 | EdgeMap(const Digraph& _g) |
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570 | : Parent(_g) {} |
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571 | |
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572 | EdgeMap(const Digraph& _g, const _Value& _v) |
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573 | : Parent(_g, _v) {} |
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574 | |
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575 | EdgeMap& operator=(const EdgeMap& cmap) { |
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576 | return operator=<EdgeMap>(cmap); |
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577 | } |
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578 | |
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579 | template <typename CMap> |
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580 | EdgeMap& operator=(const CMap& cmap) { |
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581 | Parent::operator=(cmap); |
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582 | return *this; |
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583 | } |
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584 | |
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585 | }; |
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586 | |
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587 | |
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588 | // Alteration extension |
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589 | |
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590 | Edge addEdge(const Node& from, const Node& to) { |
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591 | Edge edge = Parent::addEdge(from, to); |
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592 | notifier(Edge()).add(edge); |
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593 | std::vector<Arc> arcs; |
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594 | arcs.push_back(Parent::direct(edge, true)); |
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595 | arcs.push_back(Parent::direct(edge, false)); |
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596 | notifier(Arc()).add(arcs); |
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597 | return edge; |
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598 | } |
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599 | |
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600 | void clear() { |
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601 | notifier(Arc()).clear(); |
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602 | notifier(Edge()).clear(); |
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603 | Parent::clear(); |
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604 | } |
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605 | |
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606 | void erase(const Edge& edge) { |
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607 | std::vector<Arc> arcs; |
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608 | arcs.push_back(Parent::direct(edge, true)); |
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609 | arcs.push_back(Parent::direct(edge, false)); |
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610 | notifier(Arc()).erase(arcs); |
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611 | notifier(Edge()).erase(edge); |
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612 | Parent::erase(edge); |
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613 | } |
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614 | |
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615 | |
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616 | EdgeSetExtender() { |
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617 | arc_notifier.setContainer(*this); |
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618 | edge_notifier.setContainer(*this); |
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619 | } |
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620 | |
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621 | ~EdgeSetExtender() { |
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622 | edge_notifier.clear(); |
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623 | arc_notifier.clear(); |
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624 | } |
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625 | |
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626 | }; |
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627 | |
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628 | } |
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629 | |
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630 | #endif |
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