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_GRAPH_UTILS_H |
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20 | #define LEMON_GRAPH_UTILS_H |
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21 | |
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22 | #include <iterator> |
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23 | #include <vector> |
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24 | #include <map> |
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25 | #include <cmath> |
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26 | #include <algorithm> |
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27 | |
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28 | #include <lemon/bits/invalid.h> |
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29 | #include <lemon/bits/utility.h> |
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30 | #include <lemon/maps.h> |
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31 | #include <lemon/bits/traits.h> |
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32 | |
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33 | #include <lemon/bits/alteration_notifier.h> |
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34 | #include <lemon/bits/default_map.h> |
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35 | |
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36 | ///\ingroup gutils |
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37 | ///\file |
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38 | ///\brief Graph utilities. |
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39 | |
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40 | namespace lemon { |
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41 | |
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42 | /// \addtogroup gutils |
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43 | /// @{ |
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44 | |
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45 | namespace _graph_utils_bits { |
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46 | template <typename Graph> |
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47 | struct Node { typedef typename Graph::Node type; }; |
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48 | |
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49 | template <typename Graph> |
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50 | struct NodeIt { typedef typename Graph::NodeIt type; }; |
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51 | |
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52 | template <typename Graph> |
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53 | struct Arc { typedef typename Graph::Arc type; }; |
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54 | |
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55 | template <typename Graph> |
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56 | struct ArcIt { typedef typename Graph::ArcIt type; }; |
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57 | |
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58 | template <typename Graph> |
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59 | struct Edge { typedef typename Graph::Edge type; }; |
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60 | |
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61 | template <typename Graph> |
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62 | struct EdgeIt { typedef typename Graph::EdgeIt type; }; |
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63 | |
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64 | template <typename Graph> |
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65 | struct OutArcIt { typedef typename Graph::OutArcIt type; }; |
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66 | |
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67 | template <typename Graph> |
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68 | struct InArcIt { typedef typename Graph::InArcIt type; }; |
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69 | |
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70 | template <typename Graph> |
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71 | struct IncEdgeIt { typedef typename Graph::IncEdgeIt type; }; |
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72 | |
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73 | template <typename Graph> |
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74 | struct BoolNodeMap { |
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75 | typedef typename Graph::template NodeMap<bool> type; |
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76 | }; |
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77 | |
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78 | template <typename Graph> |
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79 | struct IntNodeMap { |
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80 | typedef typename Graph::template NodeMap<int> type; |
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81 | }; |
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82 | |
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83 | template <typename Graph> |
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84 | struct DoubleNodeMap { |
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85 | typedef typename Graph::template NodeMap<double> type; |
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86 | }; |
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87 | |
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88 | template <typename Graph> |
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89 | struct BoolArcMap { |
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90 | typedef typename Graph::template ArcMap<bool> type; |
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91 | }; |
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92 | |
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93 | template <typename Graph> |
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94 | struct IntArcMap { |
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95 | typedef typename Graph::template ArcMap<int> type; |
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96 | }; |
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97 | |
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98 | template <typename Graph> |
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99 | struct DoubleArcMap { |
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100 | typedef typename Graph::template ArcMap<double> type; |
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101 | }; |
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102 | |
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103 | template <typename Graph> |
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104 | struct BoolEdgeMap { |
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105 | typedef typename Graph::template EdgeMap<bool> type; |
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106 | }; |
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107 | |
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108 | template <typename Graph> |
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109 | struct IntEdgeMap { |
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110 | typedef typename Graph::template EdgeMap<int> type; |
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111 | }; |
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112 | |
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113 | template <typename Graph> |
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114 | struct DoubleEdgeMap { |
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115 | typedef typename Graph::template EdgeMap<double> type; |
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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 | |
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121 | ///Creates convenience typedefs for the digraph types and iterators |
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122 | |
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123 | ///This \c \#define creates convenience typedefs for the following types |
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124 | ///of \c Digraph: \c Node, \c NodeIt, \c Arc, \c ArcIt, \c InArcIt, |
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125 | ///\c OutArcIt, \c BoolNodeMap, \c IntNodeMap, \c DoubleNodeMap, |
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126 | ///\c BoolArcMap, \c IntArcMap, \c DoubleArcMap. |
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127 | #define DIGRAPH_TYPEDEFS(Digraph) \ |
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128 | typedef typename ::lemon::_graph_utils_bits:: \ |
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129 | Node<Digraph>::type Node; \ |
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130 | typedef typename ::lemon::_graph_utils_bits:: \ |
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131 | NodeIt<Digraph>::type NodeIt; \ |
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132 | typedef typename ::lemon::_graph_utils_bits:: \ |
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133 | Arc<Digraph>::type Arc; \ |
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134 | typedef typename ::lemon::_graph_utils_bits:: \ |
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135 | ArcIt<Digraph>::type ArcIt; \ |
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136 | typedef typename ::lemon::_graph_utils_bits:: \ |
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137 | OutArcIt<Digraph>::type OutArcIt; \ |
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138 | typedef typename ::lemon::_graph_utils_bits:: \ |
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139 | InArcIt<Digraph>::type InArcIt; \ |
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140 | typedef typename ::lemon::_graph_utils_bits:: \ |
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141 | BoolNodeMap<Digraph>::type BoolNodeMap; \ |
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142 | typedef typename ::lemon::_graph_utils_bits:: \ |
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143 | IntNodeMap<Digraph>::type IntNodeMap; \ |
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144 | typedef typename ::lemon::_graph_utils_bits:: \ |
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145 | DoubleNodeMap<Digraph>::type DoubleNodeMap; \ |
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146 | typedef typename ::lemon::_graph_utils_bits:: \ |
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147 | BoolArcMap<Digraph>::type BoolArcMap; \ |
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148 | typedef typename ::lemon::_graph_utils_bits:: \ |
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149 | IntArcMap<Digraph>::type IntArcMap; \ |
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150 | typedef typename ::lemon::_graph_utils_bits:: \ |
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151 | DoubleArcMap<Digraph>::type DoubleArcMap |
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152 | |
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153 | |
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154 | ///Creates convenience typedefs for the graph types and iterators |
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155 | |
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156 | ///This \c \#define creates the same convenience typedefs as defined |
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157 | ///by \ref DIGRAPH_TYPEDEFS(Graph) and six more, namely it creates |
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158 | ///\c Edge, \c EdgeIt, \c IncEdgeIt, \c BoolEdgeMap, \c IntEdgeMap, |
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159 | ///\c DoubleEdgeMap. |
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160 | #define GRAPH_TYPEDEFS(Graph) \ |
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161 | DIGRAPH_TYPEDEFS(Graph); \ |
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162 | typedef typename ::lemon::_graph_utils_bits:: \ |
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163 | Edge<Graph>::type Edge; \ |
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164 | typedef typename ::lemon::_graph_utils_bits:: \ |
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165 | EdgeIt<Graph>::type EdgeIt; \ |
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166 | typedef typename ::lemon::_graph_utils_bits:: \ |
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167 | IncEdgeIt<Graph>::type IncEdgeIt; \ |
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168 | typedef typename ::lemon::_graph_utils_bits:: \ |
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169 | BoolEdgeMap<Graph>::type BoolEdgeMap; \ |
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170 | typedef typename ::lemon::_graph_utils_bits:: \ |
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171 | IntEdgeMap<Graph>::type IntEdgeMap; \ |
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172 | typedef typename ::lemon::_graph_utils_bits:: \ |
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173 | DoubleEdgeMap<Graph>::type DoubleEdgeMap |
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174 | |
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175 | |
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176 | /// \brief Function to count the items in the graph. |
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177 | /// |
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178 | /// This function counts the items (nodes, arcs etc) in the graph. |
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179 | /// The complexity of the function is O(n) because |
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180 | /// it iterates on all of the items. |
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181 | template <typename Graph, typename Item> |
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182 | inline int countItems(const Graph& g) { |
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183 | typedef typename ItemSetTraits<Graph, Item>::ItemIt ItemIt; |
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184 | int num = 0; |
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185 | for (ItemIt it(g); it != INVALID; ++it) { |
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186 | ++num; |
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187 | } |
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188 | return num; |
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189 | } |
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190 | |
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191 | // Node counting: |
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192 | |
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193 | namespace _graph_utils_bits { |
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194 | |
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195 | template <typename Graph, typename Enable = void> |
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196 | struct CountNodesSelector { |
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197 | static int count(const Graph &g) { |
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198 | return countItems<Graph, typename Graph::Node>(g); |
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199 | } |
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200 | }; |
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201 | |
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202 | template <typename Graph> |
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203 | struct CountNodesSelector< |
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204 | Graph, typename |
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205 | enable_if<typename Graph::NodeNumTag, void>::type> |
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206 | { |
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207 | static int count(const Graph &g) { |
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208 | return g.nodeNum(); |
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209 | } |
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210 | }; |
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211 | } |
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212 | |
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213 | /// \brief Function to count the nodes in the graph. |
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214 | /// |
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215 | /// This function counts the nodes in the graph. |
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216 | /// The complexity of the function is O(n) but for some |
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217 | /// graph structures it is specialized to run in O(1). |
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218 | /// |
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219 | /// If the graph contains a \e nodeNum() member function and a |
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220 | /// \e NodeNumTag tag then this function calls directly the member |
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221 | /// function to query the cardinality of the node set. |
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222 | template <typename Graph> |
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223 | inline int countNodes(const Graph& g) { |
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224 | return _graph_utils_bits::CountNodesSelector<Graph>::count(g); |
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225 | } |
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226 | |
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227 | // Arc counting: |
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228 | |
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229 | namespace _graph_utils_bits { |
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230 | |
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231 | template <typename Graph, typename Enable = void> |
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232 | struct CountArcsSelector { |
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233 | static int count(const Graph &g) { |
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234 | return countItems<Graph, typename Graph::Arc>(g); |
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235 | } |
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236 | }; |
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237 | |
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238 | template <typename Graph> |
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239 | struct CountArcsSelector< |
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240 | Graph, |
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241 | typename enable_if<typename Graph::ArcNumTag, void>::type> |
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242 | { |
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243 | static int count(const Graph &g) { |
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244 | return g.arcNum(); |
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245 | } |
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246 | }; |
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247 | } |
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248 | |
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249 | /// \brief Function to count the arcs in the graph. |
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250 | /// |
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251 | /// This function counts the arcs in the graph. |
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252 | /// The complexity of the function is O(e) but for some |
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253 | /// graph structures it is specialized to run in O(1). |
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254 | /// |
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255 | /// If the graph contains a \e arcNum() member function and a |
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256 | /// \e EdgeNumTag tag then this function calls directly the member |
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257 | /// function to query the cardinality of the arc set. |
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258 | template <typename Graph> |
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259 | inline int countArcs(const Graph& g) { |
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260 | return _graph_utils_bits::CountArcsSelector<Graph>::count(g); |
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261 | } |
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262 | |
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263 | // Edge counting: |
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264 | namespace _graph_utils_bits { |
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265 | |
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266 | template <typename Graph, typename Enable = void> |
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267 | struct CountEdgesSelector { |
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268 | static int count(const Graph &g) { |
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269 | return countItems<Graph, typename Graph::Edge>(g); |
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270 | } |
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271 | }; |
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272 | |
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273 | template <typename Graph> |
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274 | struct CountEdgesSelector< |
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275 | Graph, |
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276 | typename enable_if<typename Graph::EdgeNumTag, void>::type> |
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277 | { |
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278 | static int count(const Graph &g) { |
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279 | return g.edgeNum(); |
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280 | } |
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281 | }; |
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282 | } |
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283 | |
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284 | /// \brief Function to count the edges in the graph. |
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285 | /// |
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286 | /// This function counts the edges in the graph. |
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287 | /// The complexity of the function is O(m) but for some |
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288 | /// graph structures it is specialized to run in O(1). |
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289 | /// |
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290 | /// If the graph contains a \e edgeNum() member function and a |
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291 | /// \e EdgeNumTag tag then this function calls directly the member |
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292 | /// function to query the cardinality of the edge set. |
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293 | template <typename Graph> |
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294 | inline int countEdges(const Graph& g) { |
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295 | return _graph_utils_bits::CountEdgesSelector<Graph>::count(g); |
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296 | |
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297 | } |
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298 | |
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299 | |
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300 | template <typename Graph, typename DegIt> |
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301 | inline int countNodeDegree(const Graph& _g, const typename Graph::Node& _n) { |
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302 | int num = 0; |
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303 | for (DegIt it(_g, _n); it != INVALID; ++it) { |
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304 | ++num; |
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305 | } |
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306 | return num; |
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307 | } |
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308 | |
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309 | /// \brief Function to count the number of the out-arcs from node \c n. |
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310 | /// |
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311 | /// This function counts the number of the out-arcs from node \c n |
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312 | /// in the graph. |
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313 | template <typename Graph> |
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314 | inline int countOutArcs(const Graph& _g, const typename Graph::Node& _n) { |
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315 | return countNodeDegree<Graph, typename Graph::OutArcIt>(_g, _n); |
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316 | } |
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317 | |
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318 | /// \brief Function to count the number of the in-arcs to node \c n. |
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319 | /// |
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320 | /// This function counts the number of the in-arcs to node \c n |
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321 | /// in the graph. |
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322 | template <typename Graph> |
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323 | inline int countInArcs(const Graph& _g, const typename Graph::Node& _n) { |
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324 | return countNodeDegree<Graph, typename Graph::InArcIt>(_g, _n); |
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325 | } |
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326 | |
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327 | /// \brief Function to count the number of the inc-edges to node \c n. |
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328 | /// |
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329 | /// This function counts the number of the inc-edges to node \c n |
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330 | /// in the graph. |
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331 | template <typename Graph> |
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332 | inline int countIncEdges(const Graph& _g, const typename Graph::Node& _n) { |
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333 | return countNodeDegree<Graph, typename Graph::IncEdgeIt>(_g, _n); |
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334 | } |
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335 | |
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336 | namespace _graph_utils_bits { |
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337 | |
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338 | template <typename Graph, typename Enable = void> |
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339 | struct FindArcSelector { |
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340 | typedef typename Graph::Node Node; |
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341 | typedef typename Graph::Arc Arc; |
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342 | static Arc find(const Graph &g, Node u, Node v, Arc e) { |
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343 | if (e == INVALID) { |
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344 | g.firstOut(e, u); |
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345 | } else { |
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346 | g.nextOut(e); |
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347 | } |
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348 | while (e != INVALID && g.target(e) != v) { |
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349 | g.nextOut(e); |
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350 | } |
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351 | return e; |
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352 | } |
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353 | }; |
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354 | |
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355 | template <typename Graph> |
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356 | struct FindArcSelector< |
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357 | Graph, |
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358 | typename enable_if<typename Graph::FindEdgeTag, void>::type> |
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359 | { |
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360 | typedef typename Graph::Node Node; |
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361 | typedef typename Graph::Arc Arc; |
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362 | static Arc find(const Graph &g, Node u, Node v, Arc prev) { |
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363 | return g.findArc(u, v, prev); |
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364 | } |
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365 | }; |
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366 | } |
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367 | |
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368 | /// \brief Finds an arc between two nodes of a graph. |
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369 | /// |
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370 | /// Finds an arc from node \c u to node \c v in graph \c g. |
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371 | /// |
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372 | /// If \c prev is \ref INVALID (this is the default value), then |
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373 | /// it finds the first arc from \c u to \c v. Otherwise it looks for |
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374 | /// the next arc from \c u to \c v after \c prev. |
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375 | /// \return The found arc or \ref INVALID if there is no such an arc. |
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376 | /// |
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377 | /// Thus you can iterate through each arc from \c u to \c v as it follows. |
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378 | ///\code |
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379 | /// for(Arc e=findArc(g,u,v);e!=INVALID;e=findArc(g,u,v,e)) { |
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380 | /// ... |
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381 | /// } |
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382 | ///\endcode |
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383 | /// |
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384 | ///\sa ArcLookUp |
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385 | ///\sa AllArcLookUp |
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386 | ///\sa DynArcLookUp |
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387 | ///\sa ConArcIt |
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388 | template <typename Graph> |
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389 | inline typename Graph::Arc |
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390 | findArc(const Graph &g, typename Graph::Node u, typename Graph::Node v, |
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391 | typename Graph::Arc prev = INVALID) { |
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392 | return _graph_utils_bits::FindArcSelector<Graph>::find(g, u, v, prev); |
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393 | } |
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394 | |
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395 | /// \brief Iterator for iterating on arcs connected the same nodes. |
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396 | /// |
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397 | /// Iterator for iterating on arcs connected the same nodes. It is |
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398 | /// higher level interface for the findArc() function. You can |
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399 | /// use it the following way: |
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400 | ///\code |
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401 | /// for (ConArcIt<Graph> it(g, src, trg); it != INVALID; ++it) { |
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402 | /// ... |
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403 | /// } |
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404 | ///\endcode |
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405 | /// |
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406 | ///\sa findArc() |
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407 | ///\sa ArcLookUp |
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408 | ///\sa AllArcLookUp |
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409 | ///\sa DynArcLookUp |
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410 | /// |
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411 | /// \author Balazs Dezso |
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412 | template <typename _Graph> |
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413 | class ConArcIt : public _Graph::Arc { |
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414 | public: |
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415 | |
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416 | typedef _Graph Graph; |
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417 | typedef typename Graph::Arc Parent; |
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418 | |
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419 | typedef typename Graph::Arc Arc; |
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420 | typedef typename Graph::Node Node; |
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421 | |
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422 | /// \brief Constructor. |
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423 | /// |
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424 | /// Construct a new ConArcIt iterating on the arcs which |
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425 | /// connects the \c u and \c v node. |
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426 | ConArcIt(const Graph& g, Node u, Node v) : _graph(g) { |
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427 | Parent::operator=(findArc(_graph, u, v)); |
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428 | } |
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429 | |
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430 | /// \brief Constructor. |
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431 | /// |
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432 | /// Construct a new ConArcIt which continues the iterating from |
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433 | /// the \c e arc. |
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434 | ConArcIt(const Graph& g, Arc a) : Parent(a), _graph(g) {} |
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435 | |
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436 | /// \brief Increment operator. |
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437 | /// |
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438 | /// It increments the iterator and gives back the next arc. |
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439 | ConArcIt& operator++() { |
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440 | Parent::operator=(findArc(_graph, _graph.source(*this), |
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441 | _graph.target(*this), *this)); |
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442 | return *this; |
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443 | } |
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444 | private: |
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445 | const Graph& _graph; |
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446 | }; |
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447 | |
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448 | namespace _graph_utils_bits { |
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449 | |
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450 | template <typename Graph, typename Enable = void> |
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451 | struct FindEdgeSelector { |
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452 | typedef typename Graph::Node Node; |
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453 | typedef typename Graph::Edge Edge; |
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454 | static Edge find(const Graph &g, Node u, Node v, Edge e) { |
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455 | bool b; |
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456 | if (u != v) { |
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457 | if (e == INVALID) { |
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458 | g.firstInc(e, b, u); |
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459 | } else { |
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460 | b = g.source(e) == u; |
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461 | g.nextInc(e, b); |
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462 | } |
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463 | while (e != INVALID && (b ? g.target(e) : g.source(e)) != v) { |
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464 | g.nextInc(e, b); |
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465 | } |
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466 | } else { |
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467 | if (e == INVALID) { |
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468 | g.firstInc(e, b, u); |
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469 | } else { |
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470 | b = true; |
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471 | g.nextInc(e, b); |
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472 | } |
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473 | while (e != INVALID && (!b || g.target(e) != v)) { |
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474 | g.nextInc(e, b); |
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475 | } |
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476 | } |
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477 | return e; |
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478 | } |
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479 | }; |
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480 | |
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481 | template <typename Graph> |
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482 | struct FindEdgeSelector< |
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483 | Graph, |
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484 | typename enable_if<typename Graph::FindEdgeTag, void>::type> |
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485 | { |
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486 | typedef typename Graph::Node Node; |
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487 | typedef typename Graph::Edge Edge; |
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488 | static Edge find(const Graph &g, Node u, Node v, Edge prev) { |
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489 | return g.findEdge(u, v, prev); |
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490 | } |
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491 | }; |
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492 | } |
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493 | |
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494 | /// \brief Finds an edge between two nodes of a graph. |
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495 | /// |
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496 | /// Finds an edge from node \c u to node \c v in graph \c g. |
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497 | /// If the node \c u and node \c v is equal then each loop edge |
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498 | /// will be enumerated once. |
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499 | /// |
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500 | /// If \c prev is \ref INVALID (this is the default value), then |
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501 | /// it finds the first arc from \c u to \c v. Otherwise it looks for |
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502 | /// the next arc from \c u to \c v after \c prev. |
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503 | /// \return The found arc or \ref INVALID if there is no such an arc. |
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504 | /// |
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505 | /// Thus you can iterate through each arc from \c u to \c v as it follows. |
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506 | ///\code |
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507 | /// for(Edge e = findEdge(g,u,v); e != INVALID; |
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508 | /// e = findEdge(g,u,v,e)) { |
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509 | /// ... |
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510 | /// } |
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511 | ///\endcode |
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512 | /// |
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513 | ///\sa ConArcIt |
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514 | |
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515 | template <typename Graph> |
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516 | inline typename Graph::Edge |
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517 | findEdge(const Graph &g, typename Graph::Node u, typename Graph::Node v, |
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518 | typename Graph::Edge p = INVALID) { |
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519 | return _graph_utils_bits::FindEdgeSelector<Graph>::find(g, u, v, p); |
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520 | } |
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521 | |
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522 | /// \brief Iterator for iterating on edges connected the same nodes. |
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523 | /// |
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524 | /// Iterator for iterating on edges connected the same nodes. It is |
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525 | /// higher level interface for the findEdge() function. You can |
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526 | /// use it the following way: |
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527 | ///\code |
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528 | /// for (ConEdgeIt<Graph> it(g, src, trg); it != INVALID; ++it) { |
---|
529 | /// ... |
---|
530 | /// } |
---|
531 | ///\endcode |
---|
532 | /// |
---|
533 | ///\sa findEdge() |
---|
534 | /// |
---|
535 | /// \author Balazs Dezso |
---|
536 | template <typename _Graph> |
---|
537 | class ConEdgeIt : public _Graph::Edge { |
---|
538 | public: |
---|
539 | |
---|
540 | typedef _Graph Graph; |
---|
541 | typedef typename Graph::Edge Parent; |
---|
542 | |
---|
543 | typedef typename Graph::Edge Edge; |
---|
544 | typedef typename Graph::Node Node; |
---|
545 | |
---|
546 | /// \brief Constructor. |
---|
547 | /// |
---|
548 | /// Construct a new ConEdgeIt iterating on the edges which |
---|
549 | /// connects the \c u and \c v node. |
---|
550 | ConEdgeIt(const Graph& g, Node u, Node v) : _graph(g) { |
---|
551 | Parent::operator=(findEdge(_graph, u, v)); |
---|
552 | } |
---|
553 | |
---|
554 | /// \brief Constructor. |
---|
555 | /// |
---|
556 | /// Construct a new ConEdgeIt which continues the iterating from |
---|
557 | /// the \c e edge. |
---|
558 | ConEdgeIt(const Graph& g, Edge e) : Parent(e), _graph(g) {} |
---|
559 | |
---|
560 | /// \brief Increment operator. |
---|
561 | /// |
---|
562 | /// It increments the iterator and gives back the next edge. |
---|
563 | ConEdgeIt& operator++() { |
---|
564 | Parent::operator=(findEdge(_graph, _graph.source(*this), |
---|
565 | _graph.target(*this), *this)); |
---|
566 | return *this; |
---|
567 | } |
---|
568 | private: |
---|
569 | const Graph& _graph; |
---|
570 | }; |
---|
571 | |
---|
572 | namespace _graph_utils_bits { |
---|
573 | |
---|
574 | template <typename Digraph, typename Item, typename RefMap> |
---|
575 | class MapCopyBase { |
---|
576 | public: |
---|
577 | virtual void copy(const Digraph& from, const RefMap& refMap) = 0; |
---|
578 | |
---|
579 | virtual ~MapCopyBase() {} |
---|
580 | }; |
---|
581 | |
---|
582 | template <typename Digraph, typename Item, typename RefMap, |
---|
583 | typename ToMap, typename FromMap> |
---|
584 | class MapCopy : public MapCopyBase<Digraph, Item, RefMap> { |
---|
585 | public: |
---|
586 | |
---|
587 | MapCopy(ToMap& tmap, const FromMap& map) |
---|
588 | : _tmap(tmap), _map(map) {} |
---|
589 | |
---|
590 | virtual void copy(const Digraph& digraph, const RefMap& refMap) { |
---|
591 | typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt; |
---|
592 | for (ItemIt it(digraph); it != INVALID; ++it) { |
---|
593 | _tmap.set(refMap[it], _map[it]); |
---|
594 | } |
---|
595 | } |
---|
596 | |
---|
597 | private: |
---|
598 | ToMap& _tmap; |
---|
599 | const FromMap& _map; |
---|
600 | }; |
---|
601 | |
---|
602 | template <typename Digraph, typename Item, typename RefMap, typename It> |
---|
603 | class ItemCopy : public MapCopyBase<Digraph, Item, RefMap> { |
---|
604 | public: |
---|
605 | |
---|
606 | ItemCopy(It& it, const Item& item) : _it(it), _item(item) {} |
---|
607 | |
---|
608 | virtual void copy(const Digraph&, const RefMap& refMap) { |
---|
609 | _it = refMap[_item]; |
---|
610 | } |
---|
611 | |
---|
612 | private: |
---|
613 | It& _it; |
---|
614 | Item _item; |
---|
615 | }; |
---|
616 | |
---|
617 | template <typename Digraph, typename Item, typename RefMap, typename Ref> |
---|
618 | class RefCopy : public MapCopyBase<Digraph, Item, RefMap> { |
---|
619 | public: |
---|
620 | |
---|
621 | RefCopy(Ref& map) : _map(map) {} |
---|
622 | |
---|
623 | virtual void copy(const Digraph& digraph, const RefMap& refMap) { |
---|
624 | typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt; |
---|
625 | for (ItemIt it(digraph); it != INVALID; ++it) { |
---|
626 | _map.set(it, refMap[it]); |
---|
627 | } |
---|
628 | } |
---|
629 | |
---|
630 | private: |
---|
631 | Ref& _map; |
---|
632 | }; |
---|
633 | |
---|
634 | template <typename Digraph, typename Item, typename RefMap, |
---|
635 | typename CrossRef> |
---|
636 | class CrossRefCopy : public MapCopyBase<Digraph, Item, RefMap> { |
---|
637 | public: |
---|
638 | |
---|
639 | CrossRefCopy(CrossRef& cmap) : _cmap(cmap) {} |
---|
640 | |
---|
641 | virtual void copy(const Digraph& digraph, const RefMap& refMap) { |
---|
642 | typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt; |
---|
643 | for (ItemIt it(digraph); it != INVALID; ++it) { |
---|
644 | _cmap.set(refMap[it], it); |
---|
645 | } |
---|
646 | } |
---|
647 | |
---|
648 | private: |
---|
649 | CrossRef& _cmap; |
---|
650 | }; |
---|
651 | |
---|
652 | template <typename Digraph, typename Enable = void> |
---|
653 | struct DigraphCopySelector { |
---|
654 | template <typename From, typename NodeRefMap, typename ArcRefMap> |
---|
655 | static void copy(Digraph &to, const From& from, |
---|
656 | NodeRefMap& nodeRefMap, ArcRefMap& arcRefMap) { |
---|
657 | for (typename From::NodeIt it(from); it != INVALID; ++it) { |
---|
658 | nodeRefMap[it] = to.addNode(); |
---|
659 | } |
---|
660 | for (typename From::ArcIt it(from); it != INVALID; ++it) { |
---|
661 | arcRefMap[it] = to.addArc(nodeRefMap[from.source(it)], |
---|
662 | nodeRefMap[from.target(it)]); |
---|
663 | } |
---|
664 | } |
---|
665 | }; |
---|
666 | |
---|
667 | template <typename Digraph> |
---|
668 | struct DigraphCopySelector< |
---|
669 | Digraph, |
---|
670 | typename enable_if<typename Digraph::BuildTag, void>::type> |
---|
671 | { |
---|
672 | template <typename From, typename NodeRefMap, typename ArcRefMap> |
---|
673 | static void copy(Digraph &to, const From& from, |
---|
674 | NodeRefMap& nodeRefMap, ArcRefMap& arcRefMap) { |
---|
675 | to.build(from, nodeRefMap, arcRefMap); |
---|
676 | } |
---|
677 | }; |
---|
678 | |
---|
679 | template <typename Graph, typename Enable = void> |
---|
680 | struct GraphCopySelector { |
---|
681 | template <typename From, typename NodeRefMap, typename EdgeRefMap> |
---|
682 | static void copy(Graph &to, const From& from, |
---|
683 | NodeRefMap& nodeRefMap, EdgeRefMap& edgeRefMap) { |
---|
684 | for (typename From::NodeIt it(from); it != INVALID; ++it) { |
---|
685 | nodeRefMap[it] = to.addNode(); |
---|
686 | } |
---|
687 | for (typename From::EdgeIt it(from); it != INVALID; ++it) { |
---|
688 | edgeRefMap[it] = to.addArc(nodeRefMap[from.source(it)], |
---|
689 | nodeRefMap[from.target(it)]); |
---|
690 | } |
---|
691 | } |
---|
692 | }; |
---|
693 | |
---|
694 | template <typename Graph> |
---|
695 | struct GraphCopySelector< |
---|
696 | Graph, |
---|
697 | typename enable_if<typename Graph::BuildTag, void>::type> |
---|
698 | { |
---|
699 | template <typename From, typename NodeRefMap, typename EdgeRefMap> |
---|
700 | static void copy(Graph &to, const From& from, |
---|
701 | NodeRefMap& nodeRefMap, EdgeRefMap& edgeRefMap) { |
---|
702 | to.build(from, nodeRefMap, edgeRefMap); |
---|
703 | } |
---|
704 | }; |
---|
705 | |
---|
706 | } |
---|
707 | |
---|
708 | /// \brief Class to copy a digraph. |
---|
709 | /// |
---|
710 | /// Class to copy a digraph to another digraph (duplicate a digraph). The |
---|
711 | /// simplest way of using it is through the \c copyDigraph() function. |
---|
712 | /// |
---|
713 | /// This class not just make a copy of a graph, but it can create |
---|
714 | /// references and cross references between the nodes and arcs of |
---|
715 | /// the two graphs, it can copy maps for use with the newly created |
---|
716 | /// graph and copy nodes and arcs. |
---|
717 | /// |
---|
718 | /// To make a copy from a graph, first an instance of DigraphCopy |
---|
719 | /// should be created, then the data belongs to the graph should |
---|
720 | /// assigned to copy. In the end, the \c run() member should be |
---|
721 | /// called. |
---|
722 | /// |
---|
723 | /// The next code copies a graph with several data: |
---|
724 | ///\code |
---|
725 | /// DigraphCopy<NewGraph, OrigGraph> dc(new_graph, orig_graph); |
---|
726 | /// // create a reference for the nodes |
---|
727 | /// OrigGraph::NodeMap<NewGraph::Node> nr(orig_graph); |
---|
728 | /// dc.nodeRef(nr); |
---|
729 | /// // create a cross reference (inverse) for the arcs |
---|
730 | /// NewGraph::ArcMap<OrigGraph::Arc> acr(new_graph); |
---|
731 | /// dc.arcCrossRef(acr); |
---|
732 | /// // copy an arc map |
---|
733 | /// OrigGraph::ArcMap<double> oamap(orig_graph); |
---|
734 | /// NewGraph::ArcMap<double> namap(new_graph); |
---|
735 | /// dc.arcMap(namap, oamap); |
---|
736 | /// // copy a node |
---|
737 | /// OrigGraph::Node on; |
---|
738 | /// NewGraph::Node nn; |
---|
739 | /// dc.node(nn, on); |
---|
740 | /// // Executions of copy |
---|
741 | /// dc.run(); |
---|
742 | ///\endcode |
---|
743 | template <typename To, typename From> |
---|
744 | class DigraphCopy { |
---|
745 | private: |
---|
746 | |
---|
747 | typedef typename From::Node Node; |
---|
748 | typedef typename From::NodeIt NodeIt; |
---|
749 | typedef typename From::Arc Arc; |
---|
750 | typedef typename From::ArcIt ArcIt; |
---|
751 | |
---|
752 | typedef typename To::Node TNode; |
---|
753 | typedef typename To::Arc TArc; |
---|
754 | |
---|
755 | typedef typename From::template NodeMap<TNode> NodeRefMap; |
---|
756 | typedef typename From::template ArcMap<TArc> ArcRefMap; |
---|
757 | |
---|
758 | |
---|
759 | public: |
---|
760 | |
---|
761 | |
---|
762 | /// \brief Constructor for the DigraphCopy. |
---|
763 | /// |
---|
764 | /// It copies the content of the \c _from digraph into the |
---|
765 | /// \c _to digraph. |
---|
766 | DigraphCopy(To& to, const From& from) |
---|
767 | : _from(from), _to(to) {} |
---|
768 | |
---|
769 | /// \brief Destructor of the DigraphCopy |
---|
770 | /// |
---|
771 | /// Destructor of the DigraphCopy |
---|
772 | ~DigraphCopy() { |
---|
773 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
774 | delete _node_maps[i]; |
---|
775 | } |
---|
776 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
777 | delete _arc_maps[i]; |
---|
778 | } |
---|
779 | |
---|
780 | } |
---|
781 | |
---|
782 | /// \brief Copies the node references into the given map. |
---|
783 | /// |
---|
784 | /// Copies the node references into the given map. The parameter |
---|
785 | /// should be a map, which key type is the Node type of the source |
---|
786 | /// graph, while the value type is the Node type of the |
---|
787 | /// destination graph. |
---|
788 | template <typename NodeRef> |
---|
789 | DigraphCopy& nodeRef(NodeRef& map) { |
---|
790 | _node_maps.push_back(new _graph_utils_bits::RefCopy<From, Node, |
---|
791 | NodeRefMap, NodeRef>(map)); |
---|
792 | return *this; |
---|
793 | } |
---|
794 | |
---|
795 | /// \brief Copies the node cross references into the given map. |
---|
796 | /// |
---|
797 | /// Copies the node cross references (reverse references) into |
---|
798 | /// the given map. The parameter should be a map, which key type |
---|
799 | /// is the Node type of the destination graph, while the value type is |
---|
800 | /// the Node type of the source graph. |
---|
801 | template <typename NodeCrossRef> |
---|
802 | DigraphCopy& nodeCrossRef(NodeCrossRef& map) { |
---|
803 | _node_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, Node, |
---|
804 | NodeRefMap, NodeCrossRef>(map)); |
---|
805 | return *this; |
---|
806 | } |
---|
807 | |
---|
808 | /// \brief Make copy of the given map. |
---|
809 | /// |
---|
810 | /// Makes copy of the given map for the newly created digraph. |
---|
811 | /// The new map's key type is the destination graph's node type, |
---|
812 | /// and the copied map's key type is the source graph's node type. |
---|
813 | template <typename ToMap, typename FromMap> |
---|
814 | DigraphCopy& nodeMap(ToMap& tmap, const FromMap& map) { |
---|
815 | _node_maps.push_back(new _graph_utils_bits::MapCopy<From, Node, |
---|
816 | NodeRefMap, ToMap, FromMap>(tmap, map)); |
---|
817 | return *this; |
---|
818 | } |
---|
819 | |
---|
820 | /// \brief Make a copy of the given node. |
---|
821 | /// |
---|
822 | /// Make a copy of the given node. |
---|
823 | DigraphCopy& node(TNode& tnode, const Node& snode) { |
---|
824 | _node_maps.push_back(new _graph_utils_bits::ItemCopy<From, Node, |
---|
825 | NodeRefMap, TNode>(tnode, snode)); |
---|
826 | return *this; |
---|
827 | } |
---|
828 | |
---|
829 | /// \brief Copies the arc references into the given map. |
---|
830 | /// |
---|
831 | /// Copies the arc references into the given map. |
---|
832 | template <typename ArcRef> |
---|
833 | DigraphCopy& arcRef(ArcRef& map) { |
---|
834 | _arc_maps.push_back(new _graph_utils_bits::RefCopy<From, Arc, |
---|
835 | ArcRefMap, ArcRef>(map)); |
---|
836 | return *this; |
---|
837 | } |
---|
838 | |
---|
839 | /// \brief Copies the arc cross references into the given map. |
---|
840 | /// |
---|
841 | /// Copies the arc cross references (reverse references) into |
---|
842 | /// the given map. |
---|
843 | template <typename ArcCrossRef> |
---|
844 | DigraphCopy& arcCrossRef(ArcCrossRef& map) { |
---|
845 | _arc_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, Arc, |
---|
846 | ArcRefMap, ArcCrossRef>(map)); |
---|
847 | return *this; |
---|
848 | } |
---|
849 | |
---|
850 | /// \brief Make copy of the given map. |
---|
851 | /// |
---|
852 | /// Makes copy of the given map for the newly created digraph. |
---|
853 | /// The new map's key type is the to digraph's arc type, |
---|
854 | /// and the copied map's key type is the from digraph's arc |
---|
855 | /// type. |
---|
856 | template <typename ToMap, typename FromMap> |
---|
857 | DigraphCopy& arcMap(ToMap& tmap, const FromMap& map) { |
---|
858 | _arc_maps.push_back(new _graph_utils_bits::MapCopy<From, Arc, |
---|
859 | ArcRefMap, ToMap, FromMap>(tmap, map)); |
---|
860 | return *this; |
---|
861 | } |
---|
862 | |
---|
863 | /// \brief Make a copy of the given arc. |
---|
864 | /// |
---|
865 | /// Make a copy of the given arc. |
---|
866 | DigraphCopy& arc(TArc& tarc, const Arc& sarc) { |
---|
867 | _arc_maps.push_back(new _graph_utils_bits::ItemCopy<From, Arc, |
---|
868 | ArcRefMap, TArc>(tarc, sarc)); |
---|
869 | return *this; |
---|
870 | } |
---|
871 | |
---|
872 | /// \brief Executes the copies. |
---|
873 | /// |
---|
874 | /// Executes the copies. |
---|
875 | void run() { |
---|
876 | NodeRefMap nodeRefMap(_from); |
---|
877 | ArcRefMap arcRefMap(_from); |
---|
878 | _graph_utils_bits::DigraphCopySelector<To>:: |
---|
879 | copy(_to, _from, nodeRefMap, arcRefMap); |
---|
880 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
881 | _node_maps[i]->copy(_from, nodeRefMap); |
---|
882 | } |
---|
883 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
884 | _arc_maps[i]->copy(_from, arcRefMap); |
---|
885 | } |
---|
886 | } |
---|
887 | |
---|
888 | protected: |
---|
889 | |
---|
890 | |
---|
891 | const From& _from; |
---|
892 | To& _to; |
---|
893 | |
---|
894 | std::vector<_graph_utils_bits::MapCopyBase<From, Node, NodeRefMap>* > |
---|
895 | _node_maps; |
---|
896 | |
---|
897 | std::vector<_graph_utils_bits::MapCopyBase<From, Arc, ArcRefMap>* > |
---|
898 | _arc_maps; |
---|
899 | |
---|
900 | }; |
---|
901 | |
---|
902 | /// \brief Copy a digraph to another digraph. |
---|
903 | /// |
---|
904 | /// Copy a digraph to another digraph. The complete usage of the |
---|
905 | /// function is detailed in the DigraphCopy class, but a short |
---|
906 | /// example shows a basic work: |
---|
907 | ///\code |
---|
908 | /// copyDigraph(trg, src).nodeRef(nr).arcCrossRef(ecr).run(); |
---|
909 | ///\endcode |
---|
910 | /// |
---|
911 | /// After the copy the \c nr map will contain the mapping from the |
---|
912 | /// nodes of the \c from digraph to the nodes of the \c to digraph and |
---|
913 | /// \c ecr will contain the mapping from the arcs of the \c to digraph |
---|
914 | /// to the arcs of the \c from digraph. |
---|
915 | /// |
---|
916 | /// \see DigraphCopy |
---|
917 | template <typename To, typename From> |
---|
918 | DigraphCopy<To, From> copyDigraph(To& to, const From& from) { |
---|
919 | return DigraphCopy<To, From>(to, from); |
---|
920 | } |
---|
921 | |
---|
922 | /// \brief Class to copy a graph. |
---|
923 | /// |
---|
924 | /// Class to copy a graph to another graph (duplicate a graph). The |
---|
925 | /// simplest way of using it is through the \c copyGraph() function. |
---|
926 | /// |
---|
927 | /// This class not just make a copy of a graph, but it can create |
---|
928 | /// references and cross references between the nodes, edges and arcs of |
---|
929 | /// the two graphs, it can copy maps for use with the newly created |
---|
930 | /// graph and copy nodes, edges and arcs. |
---|
931 | /// |
---|
932 | /// To make a copy from a graph, first an instance of GraphCopy |
---|
933 | /// should be created, then the data belongs to the graph should |
---|
934 | /// assigned to copy. In the end, the \c run() member should be |
---|
935 | /// called. |
---|
936 | /// |
---|
937 | /// The next code copies a graph with several data: |
---|
938 | ///\code |
---|
939 | /// GraphCopy<NewGraph, OrigGraph> dc(new_graph, orig_graph); |
---|
940 | /// // create a reference for the nodes |
---|
941 | /// OrigGraph::NodeMap<NewGraph::Node> nr(orig_graph); |
---|
942 | /// dc.nodeRef(nr); |
---|
943 | /// // create a cross reference (inverse) for the edges |
---|
944 | /// NewGraph::EdgeMap<OrigGraph::Arc> ecr(new_graph); |
---|
945 | /// dc.edgeCrossRef(ecr); |
---|
946 | /// // copy an arc map |
---|
947 | /// OrigGraph::ArcMap<double> oamap(orig_graph); |
---|
948 | /// NewGraph::ArcMap<double> namap(new_graph); |
---|
949 | /// dc.arcMap(namap, oamap); |
---|
950 | /// // copy a node |
---|
951 | /// OrigGraph::Node on; |
---|
952 | /// NewGraph::Node nn; |
---|
953 | /// dc.node(nn, on); |
---|
954 | /// // Executions of copy |
---|
955 | /// dc.run(); |
---|
956 | ///\endcode |
---|
957 | template <typename To, typename From> |
---|
958 | class GraphCopy { |
---|
959 | private: |
---|
960 | |
---|
961 | typedef typename From::Node Node; |
---|
962 | typedef typename From::NodeIt NodeIt; |
---|
963 | typedef typename From::Arc Arc; |
---|
964 | typedef typename From::ArcIt ArcIt; |
---|
965 | typedef typename From::Edge Edge; |
---|
966 | typedef typename From::EdgeIt EdgeIt; |
---|
967 | |
---|
968 | typedef typename To::Node TNode; |
---|
969 | typedef typename To::Arc TArc; |
---|
970 | typedef typename To::Edge TEdge; |
---|
971 | |
---|
972 | typedef typename From::template NodeMap<TNode> NodeRefMap; |
---|
973 | typedef typename From::template EdgeMap<TEdge> EdgeRefMap; |
---|
974 | |
---|
975 | struct ArcRefMap { |
---|
976 | ArcRefMap(const To& to, const From& from, |
---|
977 | const EdgeRefMap& edge_ref, const NodeRefMap& node_ref) |
---|
978 | : _to(to), _from(from), |
---|
979 | _edge_ref(edge_ref), _node_ref(node_ref) {} |
---|
980 | |
---|
981 | typedef typename From::Arc Key; |
---|
982 | typedef typename To::Arc Value; |
---|
983 | |
---|
984 | Value operator[](const Key& key) const { |
---|
985 | bool forward = |
---|
986 | (_from.direction(key) == |
---|
987 | (_node_ref[_from.source(key)] == _to.source(_edge_ref[key]))); |
---|
988 | return _to.direct(_edge_ref[key], forward); |
---|
989 | } |
---|
990 | |
---|
991 | const To& _to; |
---|
992 | const From& _from; |
---|
993 | const EdgeRefMap& _edge_ref; |
---|
994 | const NodeRefMap& _node_ref; |
---|
995 | }; |
---|
996 | |
---|
997 | |
---|
998 | public: |
---|
999 | |
---|
1000 | |
---|
1001 | /// \brief Constructor for the GraphCopy. |
---|
1002 | /// |
---|
1003 | /// It copies the content of the \c _from graph into the |
---|
1004 | /// \c _to graph. |
---|
1005 | GraphCopy(To& to, const From& from) |
---|
1006 | : _from(from), _to(to) {} |
---|
1007 | |
---|
1008 | /// \brief Destructor of the GraphCopy |
---|
1009 | /// |
---|
1010 | /// Destructor of the GraphCopy |
---|
1011 | ~GraphCopy() { |
---|
1012 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
1013 | delete _node_maps[i]; |
---|
1014 | } |
---|
1015 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
1016 | delete _arc_maps[i]; |
---|
1017 | } |
---|
1018 | for (int i = 0; i < int(_edge_maps.size()); ++i) { |
---|
1019 | delete _edge_maps[i]; |
---|
1020 | } |
---|
1021 | |
---|
1022 | } |
---|
1023 | |
---|
1024 | /// \brief Copies the node references into the given map. |
---|
1025 | /// |
---|
1026 | /// Copies the node references into the given map. |
---|
1027 | template <typename NodeRef> |
---|
1028 | GraphCopy& nodeRef(NodeRef& map) { |
---|
1029 | _node_maps.push_back(new _graph_utils_bits::RefCopy<From, Node, |
---|
1030 | NodeRefMap, NodeRef>(map)); |
---|
1031 | return *this; |
---|
1032 | } |
---|
1033 | |
---|
1034 | /// \brief Copies the node cross references into the given map. |
---|
1035 | /// |
---|
1036 | /// Copies the node cross references (reverse references) into |
---|
1037 | /// the given map. |
---|
1038 | template <typename NodeCrossRef> |
---|
1039 | GraphCopy& nodeCrossRef(NodeCrossRef& map) { |
---|
1040 | _node_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, Node, |
---|
1041 | NodeRefMap, NodeCrossRef>(map)); |
---|
1042 | return *this; |
---|
1043 | } |
---|
1044 | |
---|
1045 | /// \brief Make copy of the given map. |
---|
1046 | /// |
---|
1047 | /// Makes copy of the given map for the newly created graph. |
---|
1048 | /// The new map's key type is the to graph's node type, |
---|
1049 | /// and the copied map's key type is the from graph's node |
---|
1050 | /// type. |
---|
1051 | template <typename ToMap, typename FromMap> |
---|
1052 | GraphCopy& nodeMap(ToMap& tmap, const FromMap& map) { |
---|
1053 | _node_maps.push_back(new _graph_utils_bits::MapCopy<From, Node, |
---|
1054 | NodeRefMap, ToMap, FromMap>(tmap, map)); |
---|
1055 | return *this; |
---|
1056 | } |
---|
1057 | |
---|
1058 | /// \brief Make a copy of the given node. |
---|
1059 | /// |
---|
1060 | /// Make a copy of the given node. |
---|
1061 | GraphCopy& node(TNode& tnode, const Node& snode) { |
---|
1062 | _node_maps.push_back(new _graph_utils_bits::ItemCopy<From, Node, |
---|
1063 | NodeRefMap, TNode>(tnode, snode)); |
---|
1064 | return *this; |
---|
1065 | } |
---|
1066 | |
---|
1067 | /// \brief Copies the arc references into the given map. |
---|
1068 | /// |
---|
1069 | /// Copies the arc references into the given map. |
---|
1070 | template <typename ArcRef> |
---|
1071 | GraphCopy& arcRef(ArcRef& map) { |
---|
1072 | _arc_maps.push_back(new _graph_utils_bits::RefCopy<From, Arc, |
---|
1073 | ArcRefMap, ArcRef>(map)); |
---|
1074 | return *this; |
---|
1075 | } |
---|
1076 | |
---|
1077 | /// \brief Copies the arc cross references into the given map. |
---|
1078 | /// |
---|
1079 | /// Copies the arc cross references (reverse references) into |
---|
1080 | /// the given map. |
---|
1081 | template <typename ArcCrossRef> |
---|
1082 | GraphCopy& arcCrossRef(ArcCrossRef& map) { |
---|
1083 | _arc_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, Arc, |
---|
1084 | ArcRefMap, ArcCrossRef>(map)); |
---|
1085 | return *this; |
---|
1086 | } |
---|
1087 | |
---|
1088 | /// \brief Make copy of the given map. |
---|
1089 | /// |
---|
1090 | /// Makes copy of the given map for the newly created graph. |
---|
1091 | /// The new map's key type is the to graph's arc type, |
---|
1092 | /// and the copied map's key type is the from graph's arc |
---|
1093 | /// type. |
---|
1094 | template <typename ToMap, typename FromMap> |
---|
1095 | GraphCopy& arcMap(ToMap& tmap, const FromMap& map) { |
---|
1096 | _arc_maps.push_back(new _graph_utils_bits::MapCopy<From, Arc, |
---|
1097 | ArcRefMap, ToMap, FromMap>(tmap, map)); |
---|
1098 | return *this; |
---|
1099 | } |
---|
1100 | |
---|
1101 | /// \brief Make a copy of the given arc. |
---|
1102 | /// |
---|
1103 | /// Make a copy of the given arc. |
---|
1104 | GraphCopy& arc(TArc& tarc, const Arc& sarc) { |
---|
1105 | _arc_maps.push_back(new _graph_utils_bits::ItemCopy<From, Arc, |
---|
1106 | ArcRefMap, TArc>(tarc, sarc)); |
---|
1107 | return *this; |
---|
1108 | } |
---|
1109 | |
---|
1110 | /// \brief Copies the edge references into the given map. |
---|
1111 | /// |
---|
1112 | /// Copies the edge references into the given map. |
---|
1113 | template <typename EdgeRef> |
---|
1114 | GraphCopy& edgeRef(EdgeRef& map) { |
---|
1115 | _edge_maps.push_back(new _graph_utils_bits::RefCopy<From, Edge, |
---|
1116 | EdgeRefMap, EdgeRef>(map)); |
---|
1117 | return *this; |
---|
1118 | } |
---|
1119 | |
---|
1120 | /// \brief Copies the edge cross references into the given map. |
---|
1121 | /// |
---|
1122 | /// Copies the edge cross references (reverse |
---|
1123 | /// references) into the given map. |
---|
1124 | template <typename EdgeCrossRef> |
---|
1125 | GraphCopy& edgeCrossRef(EdgeCrossRef& map) { |
---|
1126 | _edge_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, |
---|
1127 | Edge, EdgeRefMap, EdgeCrossRef>(map)); |
---|
1128 | return *this; |
---|
1129 | } |
---|
1130 | |
---|
1131 | /// \brief Make copy of the given map. |
---|
1132 | /// |
---|
1133 | /// Makes copy of the given map for the newly created graph. |
---|
1134 | /// The new map's key type is the to graph's edge type, |
---|
1135 | /// and the copied map's key type is the from graph's edge |
---|
1136 | /// type. |
---|
1137 | template <typename ToMap, typename FromMap> |
---|
1138 | GraphCopy& edgeMap(ToMap& tmap, const FromMap& map) { |
---|
1139 | _edge_maps.push_back(new _graph_utils_bits::MapCopy<From, Edge, |
---|
1140 | EdgeRefMap, ToMap, FromMap>(tmap, map)); |
---|
1141 | return *this; |
---|
1142 | } |
---|
1143 | |
---|
1144 | /// \brief Make a copy of the given edge. |
---|
1145 | /// |
---|
1146 | /// Make a copy of the given edge. |
---|
1147 | GraphCopy& edge(TEdge& tedge, const Edge& sedge) { |
---|
1148 | _edge_maps.push_back(new _graph_utils_bits::ItemCopy<From, Edge, |
---|
1149 | EdgeRefMap, TEdge>(tedge, sedge)); |
---|
1150 | return *this; |
---|
1151 | } |
---|
1152 | |
---|
1153 | /// \brief Executes the copies. |
---|
1154 | /// |
---|
1155 | /// Executes the copies. |
---|
1156 | void run() { |
---|
1157 | NodeRefMap nodeRefMap(_from); |
---|
1158 | EdgeRefMap edgeRefMap(_from); |
---|
1159 | ArcRefMap arcRefMap(_to, _from, edgeRefMap, nodeRefMap); |
---|
1160 | _graph_utils_bits::GraphCopySelector<To>:: |
---|
1161 | copy(_to, _from, nodeRefMap, edgeRefMap); |
---|
1162 | for (int i = 0; i < int(_node_maps.size()); ++i) { |
---|
1163 | _node_maps[i]->copy(_from, nodeRefMap); |
---|
1164 | } |
---|
1165 | for (int i = 0; i < int(_edge_maps.size()); ++i) { |
---|
1166 | _edge_maps[i]->copy(_from, edgeRefMap); |
---|
1167 | } |
---|
1168 | for (int i = 0; i < int(_arc_maps.size()); ++i) { |
---|
1169 | _arc_maps[i]->copy(_from, arcRefMap); |
---|
1170 | } |
---|
1171 | } |
---|
1172 | |
---|
1173 | private: |
---|
1174 | |
---|
1175 | const From& _from; |
---|
1176 | To& _to; |
---|
1177 | |
---|
1178 | std::vector<_graph_utils_bits::MapCopyBase<From, Node, NodeRefMap>* > |
---|
1179 | _node_maps; |
---|
1180 | |
---|
1181 | std::vector<_graph_utils_bits::MapCopyBase<From, Arc, ArcRefMap>* > |
---|
1182 | _arc_maps; |
---|
1183 | |
---|
1184 | std::vector<_graph_utils_bits::MapCopyBase<From, Edge, EdgeRefMap>* > |
---|
1185 | _edge_maps; |
---|
1186 | |
---|
1187 | }; |
---|
1188 | |
---|
1189 | /// \brief Copy a graph to another graph. |
---|
1190 | /// |
---|
1191 | /// Copy a graph to another graph. The complete usage of the |
---|
1192 | /// function is detailed in the GraphCopy class, but a short |
---|
1193 | /// example shows a basic work: |
---|
1194 | ///\code |
---|
1195 | /// copyGraph(trg, src).nodeRef(nr).arcCrossRef(ecr).run(); |
---|
1196 | ///\endcode |
---|
1197 | /// |
---|
1198 | /// After the copy the \c nr map will contain the mapping from the |
---|
1199 | /// nodes of the \c from graph to the nodes of the \c to graph and |
---|
1200 | /// \c ecr will contain the mapping from the arcs of the \c to graph |
---|
1201 | /// to the arcs of the \c from graph. |
---|
1202 | /// |
---|
1203 | /// \see GraphCopy |
---|
1204 | template <typename To, typename From> |
---|
1205 | GraphCopy<To, From> |
---|
1206 | copyGraph(To& to, const From& from) { |
---|
1207 | return GraphCopy<To, From>(to, from); |
---|
1208 | } |
---|
1209 | |
---|
1210 | /// @} |
---|
1211 | |
---|
1212 | /// \addtogroup graph_maps |
---|
1213 | /// @{ |
---|
1214 | |
---|
1215 | /// Provides an immutable and unique id for each item in the graph. |
---|
1216 | |
---|
1217 | /// The IdMap class provides a unique and immutable id for each item of the |
---|
1218 | /// same type (e.g. node) in the graph. This id is <ul><li>\b unique: |
---|
1219 | /// different items (nodes) get different ids <li>\b immutable: the id of an |
---|
1220 | /// item (node) does not change (even if you delete other nodes). </ul> |
---|
1221 | /// Through this map you get access (i.e. can read) the inner id values of |
---|
1222 | /// the items stored in the graph. This map can be inverted with its member |
---|
1223 | /// class \c InverseMap or with the \c operator() member. |
---|
1224 | /// |
---|
1225 | template <typename _Graph, typename _Item> |
---|
1226 | class IdMap { |
---|
1227 | public: |
---|
1228 | typedef _Graph Graph; |
---|
1229 | typedef int Value; |
---|
1230 | typedef _Item Item; |
---|
1231 | typedef _Item Key; |
---|
1232 | |
---|
1233 | /// \brief Constructor. |
---|
1234 | /// |
---|
1235 | /// Constructor of the map. |
---|
1236 | explicit IdMap(const Graph& graph) : _graph(&graph) {} |
---|
1237 | |
---|
1238 | /// \brief Gives back the \e id of the item. |
---|
1239 | /// |
---|
1240 | /// Gives back the immutable and unique \e id of the item. |
---|
1241 | int operator[](const Item& item) const { return _graph->id(item);} |
---|
1242 | |
---|
1243 | /// \brief Gives back the item by its id. |
---|
1244 | /// |
---|
1245 | /// Gives back the item by its id. |
---|
1246 | Item operator()(int id) { return _graph->fromId(id, Item()); } |
---|
1247 | |
---|
1248 | private: |
---|
1249 | const Graph* _graph; |
---|
1250 | |
---|
1251 | public: |
---|
1252 | |
---|
1253 | /// \brief The class represents the inverse of its owner (IdMap). |
---|
1254 | /// |
---|
1255 | /// The class represents the inverse of its owner (IdMap). |
---|
1256 | /// \see inverse() |
---|
1257 | class InverseMap { |
---|
1258 | public: |
---|
1259 | |
---|
1260 | /// \brief Constructor. |
---|
1261 | /// |
---|
1262 | /// Constructor for creating an id-to-item map. |
---|
1263 | explicit InverseMap(const Graph& graph) : _graph(&graph) {} |
---|
1264 | |
---|
1265 | /// \brief Constructor. |
---|
1266 | /// |
---|
1267 | /// Constructor for creating an id-to-item map. |
---|
1268 | explicit InverseMap(const IdMap& map) : _graph(map._graph) {} |
---|
1269 | |
---|
1270 | /// \brief Gives back the given item from its id. |
---|
1271 | /// |
---|
1272 | /// Gives back the given item from its id. |
---|
1273 | /// |
---|
1274 | Item operator[](int id) const { return _graph->fromId(id, Item());} |
---|
1275 | |
---|
1276 | private: |
---|
1277 | const Graph* _graph; |
---|
1278 | }; |
---|
1279 | |
---|
1280 | /// \brief Gives back the inverse of the map. |
---|
1281 | /// |
---|
1282 | /// Gives back the inverse of the IdMap. |
---|
1283 | InverseMap inverse() const { return InverseMap(*_graph);} |
---|
1284 | |
---|
1285 | }; |
---|
1286 | |
---|
1287 | |
---|
1288 | /// \brief General invertable graph-map type. |
---|
1289 | |
---|
1290 | /// This type provides simple invertable graph-maps. |
---|
1291 | /// The InvertableMap wraps an arbitrary ReadWriteMap |
---|
1292 | /// and if a key is set to a new value then store it |
---|
1293 | /// in the inverse map. |
---|
1294 | /// |
---|
1295 | /// The values of the map can be accessed |
---|
1296 | /// with stl compatible forward iterator. |
---|
1297 | /// |
---|
1298 | /// \param _Graph The graph type. |
---|
1299 | /// \param _Item The item type of the graph. |
---|
1300 | /// \param _Value The value type of the map. |
---|
1301 | /// |
---|
1302 | /// \see IterableValueMap |
---|
1303 | template <typename _Graph, typename _Item, typename _Value> |
---|
1304 | class InvertableMap : protected DefaultMap<_Graph, _Item, _Value> { |
---|
1305 | private: |
---|
1306 | |
---|
1307 | typedef DefaultMap<_Graph, _Item, _Value> Map; |
---|
1308 | typedef _Graph Graph; |
---|
1309 | |
---|
1310 | typedef std::map<_Value, _Item> Container; |
---|
1311 | Container _inv_map; |
---|
1312 | |
---|
1313 | public: |
---|
1314 | |
---|
1315 | /// The key type of InvertableMap (Node, Arc, Edge). |
---|
1316 | typedef typename Map::Key Key; |
---|
1317 | /// The value type of the InvertableMap. |
---|
1318 | typedef typename Map::Value Value; |
---|
1319 | |
---|
1320 | |
---|
1321 | |
---|
1322 | /// \brief Constructor. |
---|
1323 | /// |
---|
1324 | /// Construct a new InvertableMap for the graph. |
---|
1325 | /// |
---|
1326 | explicit InvertableMap(const Graph& graph) : Map(graph) {} |
---|
1327 | |
---|
1328 | /// \brief Forward iterator for values. |
---|
1329 | /// |
---|
1330 | /// This iterator is an stl compatible forward |
---|
1331 | /// iterator on the values of the map. The values can |
---|
1332 | /// be accessed in the [beginValue, endValue) range. |
---|
1333 | /// |
---|
1334 | class ValueIterator |
---|
1335 | : public std::iterator<std::forward_iterator_tag, Value> { |
---|
1336 | friend class InvertableMap; |
---|
1337 | private: |
---|
1338 | ValueIterator(typename Container::const_iterator _it) |
---|
1339 | : it(_it) {} |
---|
1340 | public: |
---|
1341 | |
---|
1342 | ValueIterator() {} |
---|
1343 | |
---|
1344 | ValueIterator& operator++() { ++it; return *this; } |
---|
1345 | ValueIterator operator++(int) { |
---|
1346 | ValueIterator tmp(*this); |
---|
1347 | operator++(); |
---|
1348 | return tmp; |
---|
1349 | } |
---|
1350 | |
---|
1351 | const Value& operator*() const { return it->first; } |
---|
1352 | const Value* operator->() const { return &(it->first); } |
---|
1353 | |
---|
1354 | bool operator==(ValueIterator jt) const { return it == jt.it; } |
---|
1355 | bool operator!=(ValueIterator jt) const { return it != jt.it; } |
---|
1356 | |
---|
1357 | private: |
---|
1358 | typename Container::const_iterator it; |
---|
1359 | }; |
---|
1360 | |
---|
1361 | /// \brief Returns an iterator to the first value. |
---|
1362 | /// |
---|
1363 | /// Returns an stl compatible iterator to the |
---|
1364 | /// first value of the map. The values of the |
---|
1365 | /// map can be accessed in the [beginValue, endValue) |
---|
1366 | /// range. |
---|
1367 | ValueIterator beginValue() const { |
---|
1368 | return ValueIterator(_inv_map.begin()); |
---|
1369 | } |
---|
1370 | |
---|
1371 | /// \brief Returns an iterator after the last value. |
---|
1372 | /// |
---|
1373 | /// Returns an stl compatible iterator after the |
---|
1374 | /// last value of the map. The values of the |
---|
1375 | /// map can be accessed in the [beginValue, endValue) |
---|
1376 | /// range. |
---|
1377 | ValueIterator endValue() const { |
---|
1378 | return ValueIterator(_inv_map.end()); |
---|
1379 | } |
---|
1380 | |
---|
1381 | /// \brief The setter function of the map. |
---|
1382 | /// |
---|
1383 | /// Sets the mapped value. |
---|
1384 | void set(const Key& key, const Value& val) { |
---|
1385 | Value oldval = Map::operator[](key); |
---|
1386 | typename Container::iterator it = _inv_map.find(oldval); |
---|
1387 | if (it != _inv_map.end() && it->second == key) { |
---|
1388 | _inv_map.erase(it); |
---|
1389 | } |
---|
1390 | _inv_map.insert(make_pair(val, key)); |
---|
1391 | Map::set(key, val); |
---|
1392 | } |
---|
1393 | |
---|
1394 | /// \brief The getter function of the map. |
---|
1395 | /// |
---|
1396 | /// It gives back the value associated with the key. |
---|
1397 | typename MapTraits<Map>::ConstReturnValue |
---|
1398 | operator[](const Key& key) const { |
---|
1399 | return Map::operator[](key); |
---|
1400 | } |
---|
1401 | |
---|
1402 | /// \brief Gives back the item by its value. |
---|
1403 | /// |
---|
1404 | /// Gives back the item by its value. |
---|
1405 | Key operator()(const Value& key) const { |
---|
1406 | typename Container::const_iterator it = _inv_map.find(key); |
---|
1407 | return it != _inv_map.end() ? it->second : INVALID; |
---|
1408 | } |
---|
1409 | |
---|
1410 | protected: |
---|
1411 | |
---|
1412 | /// \brief Erase the key from the map. |
---|
1413 | /// |
---|
1414 | /// Erase the key to the map. It is called by the |
---|
1415 | /// \c AlterationNotifier. |
---|
1416 | virtual void erase(const Key& key) { |
---|
1417 | Value val = Map::operator[](key); |
---|
1418 | typename Container::iterator it = _inv_map.find(val); |
---|
1419 | if (it != _inv_map.end() && it->second == key) { |
---|
1420 | _inv_map.erase(it); |
---|
1421 | } |
---|
1422 | Map::erase(key); |
---|
1423 | } |
---|
1424 | |
---|
1425 | /// \brief Erase more keys from the map. |
---|
1426 | /// |
---|
1427 | /// Erase more keys from the map. It is called by the |
---|
1428 | /// \c AlterationNotifier. |
---|
1429 | virtual void erase(const std::vector<Key>& keys) { |
---|
1430 | for (int i = 0; i < int(keys.size()); ++i) { |
---|
1431 | Value val = Map::operator[](keys[i]); |
---|
1432 | typename Container::iterator it = _inv_map.find(val); |
---|
1433 | if (it != _inv_map.end() && it->second == keys[i]) { |
---|
1434 | _inv_map.erase(it); |
---|
1435 | } |
---|
1436 | } |
---|
1437 | Map::erase(keys); |
---|
1438 | } |
---|
1439 | |
---|
1440 | /// \brief Clear the keys from the map and inverse map. |
---|
1441 | /// |
---|
1442 | /// Clear the keys from the map and inverse map. It is called by the |
---|
1443 | /// \c AlterationNotifier. |
---|
1444 | virtual void clear() { |
---|
1445 | _inv_map.clear(); |
---|
1446 | Map::clear(); |
---|
1447 | } |
---|
1448 | |
---|
1449 | public: |
---|
1450 | |
---|
1451 | /// \brief The inverse map type. |
---|
1452 | /// |
---|
1453 | /// The inverse of this map. The subscript operator of the map |
---|
1454 | /// gives back always the item what was last assigned to the value. |
---|
1455 | class InverseMap { |
---|
1456 | public: |
---|
1457 | /// \brief Constructor of the InverseMap. |
---|
1458 | /// |
---|
1459 | /// Constructor of the InverseMap. |
---|
1460 | explicit InverseMap(const InvertableMap& inverted) |
---|
1461 | : _inverted(inverted) {} |
---|
1462 | |
---|
1463 | /// The value type of the InverseMap. |
---|
1464 | typedef typename InvertableMap::Key Value; |
---|
1465 | /// The key type of the InverseMap. |
---|
1466 | typedef typename InvertableMap::Value Key; |
---|
1467 | |
---|
1468 | /// \brief Subscript operator. |
---|
1469 | /// |
---|
1470 | /// Subscript operator. It gives back always the item |
---|
1471 | /// what was last assigned to the value. |
---|
1472 | Value operator[](const Key& key) const { |
---|
1473 | return _inverted(key); |
---|
1474 | } |
---|
1475 | |
---|
1476 | private: |
---|
1477 | const InvertableMap& _inverted; |
---|
1478 | }; |
---|
1479 | |
---|
1480 | /// \brief It gives back the just readable inverse map. |
---|
1481 | /// |
---|
1482 | /// It gives back the just readable inverse map. |
---|
1483 | InverseMap inverse() const { |
---|
1484 | return InverseMap(*this); |
---|
1485 | } |
---|
1486 | |
---|
1487 | |
---|
1488 | |
---|
1489 | }; |
---|
1490 | |
---|
1491 | /// \brief Provides a mutable, continuous and unique descriptor for each |
---|
1492 | /// item in the graph. |
---|
1493 | /// |
---|
1494 | /// The DescriptorMap class provides a unique and continuous (but mutable) |
---|
1495 | /// descriptor (id) for each item of the same type (e.g. node) in the |
---|
1496 | /// graph. This id is <ul><li>\b unique: different items (nodes) get |
---|
1497 | /// different ids <li>\b continuous: the range of the ids is the set of |
---|
1498 | /// integers between 0 and \c n-1, where \c n is the number of the items of |
---|
1499 | /// this type (e.g. nodes) (so the id of a node can change if you delete an |
---|
1500 | /// other node, i.e. this id is mutable). </ul> This map can be inverted |
---|
1501 | /// with its member class \c InverseMap, or with the \c operator() member. |
---|
1502 | /// |
---|
1503 | /// \param _Graph The graph class the \c DescriptorMap belongs to. |
---|
1504 | /// \param _Item The Item is the Key of the Map. It may be Node, Arc or |
---|
1505 | /// Edge. |
---|
1506 | template <typename _Graph, typename _Item> |
---|
1507 | class DescriptorMap : protected DefaultMap<_Graph, _Item, int> { |
---|
1508 | |
---|
1509 | typedef _Item Item; |
---|
1510 | typedef DefaultMap<_Graph, _Item, int> Map; |
---|
1511 | |
---|
1512 | public: |
---|
1513 | /// The graph class of DescriptorMap. |
---|
1514 | typedef _Graph Graph; |
---|
1515 | |
---|
1516 | /// The key type of DescriptorMap (Node, Arc, Edge). |
---|
1517 | typedef typename Map::Key Key; |
---|
1518 | /// The value type of DescriptorMap. |
---|
1519 | typedef typename Map::Value Value; |
---|
1520 | |
---|
1521 | /// \brief Constructor. |
---|
1522 | /// |
---|
1523 | /// Constructor for descriptor map. |
---|
1524 | explicit DescriptorMap(const Graph& _graph) : Map(_graph) { |
---|
1525 | Item it; |
---|
1526 | const typename Map::Notifier* nf = Map::notifier(); |
---|
1527 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
1528 | Map::set(it, _inv_map.size()); |
---|
1529 | _inv_map.push_back(it); |
---|
1530 | } |
---|
1531 | } |
---|
1532 | |
---|
1533 | protected: |
---|
1534 | |
---|
1535 | /// \brief Add a new key to the map. |
---|
1536 | /// |
---|
1537 | /// Add a new key to the map. It is called by the |
---|
1538 | /// \c AlterationNotifier. |
---|
1539 | virtual void add(const Item& item) { |
---|
1540 | Map::add(item); |
---|
1541 | Map::set(item, _inv_map.size()); |
---|
1542 | _inv_map.push_back(item); |
---|
1543 | } |
---|
1544 | |
---|
1545 | /// \brief Add more new keys to the map. |
---|
1546 | /// |
---|
1547 | /// Add more new keys to the map. It is called by the |
---|
1548 | /// \c AlterationNotifier. |
---|
1549 | virtual void add(const std::vector<Item>& items) { |
---|
1550 | Map::add(items); |
---|
1551 | for (int i = 0; i < int(items.size()); ++i) { |
---|
1552 | Map::set(items[i], _inv_map.size()); |
---|
1553 | _inv_map.push_back(items[i]); |
---|
1554 | } |
---|
1555 | } |
---|
1556 | |
---|
1557 | /// \brief Erase the key from the map. |
---|
1558 | /// |
---|
1559 | /// Erase the key from the map. It is called by the |
---|
1560 | /// \c AlterationNotifier. |
---|
1561 | virtual void erase(const Item& item) { |
---|
1562 | Map::set(_inv_map.back(), Map::operator[](item)); |
---|
1563 | _inv_map[Map::operator[](item)] = _inv_map.back(); |
---|
1564 | _inv_map.pop_back(); |
---|
1565 | Map::erase(item); |
---|
1566 | } |
---|
1567 | |
---|
1568 | /// \brief Erase more keys from the map. |
---|
1569 | /// |
---|
1570 | /// Erase more keys from the map. It is called by the |
---|
1571 | /// \c AlterationNotifier. |
---|
1572 | virtual void erase(const std::vector<Item>& items) { |
---|
1573 | for (int i = 0; i < int(items.size()); ++i) { |
---|
1574 | Map::set(_inv_map.back(), Map::operator[](items[i])); |
---|
1575 | _inv_map[Map::operator[](items[i])] = _inv_map.back(); |
---|
1576 | _inv_map.pop_back(); |
---|
1577 | } |
---|
1578 | Map::erase(items); |
---|
1579 | } |
---|
1580 | |
---|
1581 | /// \brief Build the unique map. |
---|
1582 | /// |
---|
1583 | /// Build the unique map. It is called by the |
---|
1584 | /// \c AlterationNotifier. |
---|
1585 | virtual void build() { |
---|
1586 | Map::build(); |
---|
1587 | Item it; |
---|
1588 | const typename Map::Notifier* nf = Map::notifier(); |
---|
1589 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
1590 | Map::set(it, _inv_map.size()); |
---|
1591 | _inv_map.push_back(it); |
---|
1592 | } |
---|
1593 | } |
---|
1594 | |
---|
1595 | /// \brief Clear the keys from the map. |
---|
1596 | /// |
---|
1597 | /// Clear the keys from the map. It is called by the |
---|
1598 | /// \c AlterationNotifier. |
---|
1599 | virtual void clear() { |
---|
1600 | _inv_map.clear(); |
---|
1601 | Map::clear(); |
---|
1602 | } |
---|
1603 | |
---|
1604 | public: |
---|
1605 | |
---|
1606 | /// \brief Returns the maximal value plus one. |
---|
1607 | /// |
---|
1608 | /// Returns the maximal value plus one in the map. |
---|
1609 | unsigned int size() const { |
---|
1610 | return _inv_map.size(); |
---|
1611 | } |
---|
1612 | |
---|
1613 | /// \brief Swaps the position of the two items in the map. |
---|
1614 | /// |
---|
1615 | /// Swaps the position of the two items in the map. |
---|
1616 | void swap(const Item& p, const Item& q) { |
---|
1617 | int pi = Map::operator[](p); |
---|
1618 | int qi = Map::operator[](q); |
---|
1619 | Map::set(p, qi); |
---|
1620 | _inv_map[qi] = p; |
---|
1621 | Map::set(q, pi); |
---|
1622 | _inv_map[pi] = q; |
---|
1623 | } |
---|
1624 | |
---|
1625 | /// \brief Gives back the \e descriptor of the item. |
---|
1626 | /// |
---|
1627 | /// Gives back the mutable and unique \e descriptor of the map. |
---|
1628 | int operator[](const Item& item) const { |
---|
1629 | return Map::operator[](item); |
---|
1630 | } |
---|
1631 | |
---|
1632 | /// \brief Gives back the item by its descriptor. |
---|
1633 | /// |
---|
1634 | /// Gives back th item by its descriptor. |
---|
1635 | Item operator()(int id) const { |
---|
1636 | return _inv_map[id]; |
---|
1637 | } |
---|
1638 | |
---|
1639 | private: |
---|
1640 | |
---|
1641 | typedef std::vector<Item> Container; |
---|
1642 | Container _inv_map; |
---|
1643 | |
---|
1644 | public: |
---|
1645 | /// \brief The inverse map type of DescriptorMap. |
---|
1646 | /// |
---|
1647 | /// The inverse map type of DescriptorMap. |
---|
1648 | class InverseMap { |
---|
1649 | public: |
---|
1650 | /// \brief Constructor of the InverseMap. |
---|
1651 | /// |
---|
1652 | /// Constructor of the InverseMap. |
---|
1653 | explicit InverseMap(const DescriptorMap& inverted) |
---|
1654 | : _inverted(inverted) {} |
---|
1655 | |
---|
1656 | |
---|
1657 | /// The value type of the InverseMap. |
---|
1658 | typedef typename DescriptorMap::Key Value; |
---|
1659 | /// The key type of the InverseMap. |
---|
1660 | typedef typename DescriptorMap::Value Key; |
---|
1661 | |
---|
1662 | /// \brief Subscript operator. |
---|
1663 | /// |
---|
1664 | /// Subscript operator. It gives back the item |
---|
1665 | /// that the descriptor belongs to currently. |
---|
1666 | Value operator[](const Key& key) const { |
---|
1667 | return _inverted(key); |
---|
1668 | } |
---|
1669 | |
---|
1670 | /// \brief Size of the map. |
---|
1671 | /// |
---|
1672 | /// Returns the size of the map. |
---|
1673 | unsigned int size() const { |
---|
1674 | return _inverted.size(); |
---|
1675 | } |
---|
1676 | |
---|
1677 | private: |
---|
1678 | const DescriptorMap& _inverted; |
---|
1679 | }; |
---|
1680 | |
---|
1681 | /// \brief Gives back the inverse of the map. |
---|
1682 | /// |
---|
1683 | /// Gives back the inverse of the map. |
---|
1684 | const InverseMap inverse() const { |
---|
1685 | return InverseMap(*this); |
---|
1686 | } |
---|
1687 | }; |
---|
1688 | |
---|
1689 | /// \brief Returns the source of the given arc. |
---|
1690 | /// |
---|
1691 | /// The SourceMap gives back the source Node of the given arc. |
---|
1692 | /// \see TargetMap |
---|
1693 | /// \author Balazs Dezso |
---|
1694 | template <typename Digraph> |
---|
1695 | class SourceMap { |
---|
1696 | public: |
---|
1697 | |
---|
1698 | typedef typename Digraph::Node Value; |
---|
1699 | typedef typename Digraph::Arc Key; |
---|
1700 | |
---|
1701 | /// \brief Constructor |
---|
1702 | /// |
---|
1703 | /// Constructor |
---|
1704 | /// \param _digraph The digraph that the map belongs to. |
---|
1705 | explicit SourceMap(const Digraph& digraph) : _digraph(digraph) {} |
---|
1706 | |
---|
1707 | /// \brief The subscript operator. |
---|
1708 | /// |
---|
1709 | /// The subscript operator. |
---|
1710 | /// \param arc The arc |
---|
1711 | /// \return The source of the arc |
---|
1712 | Value operator[](const Key& arc) const { |
---|
1713 | return _digraph.source(arc); |
---|
1714 | } |
---|
1715 | |
---|
1716 | private: |
---|
1717 | const Digraph& _digraph; |
---|
1718 | }; |
---|
1719 | |
---|
1720 | /// \brief Returns a \ref SourceMap class. |
---|
1721 | /// |
---|
1722 | /// This function just returns an \ref SourceMap class. |
---|
1723 | /// \relates SourceMap |
---|
1724 | template <typename Digraph> |
---|
1725 | inline SourceMap<Digraph> sourceMap(const Digraph& digraph) { |
---|
1726 | return SourceMap<Digraph>(digraph); |
---|
1727 | } |
---|
1728 | |
---|
1729 | /// \brief Returns the target of the given arc. |
---|
1730 | /// |
---|
1731 | /// The TargetMap gives back the target Node of the given arc. |
---|
1732 | /// \see SourceMap |
---|
1733 | /// \author Balazs Dezso |
---|
1734 | template <typename Digraph> |
---|
1735 | class TargetMap { |
---|
1736 | public: |
---|
1737 | |
---|
1738 | typedef typename Digraph::Node Value; |
---|
1739 | typedef typename Digraph::Arc Key; |
---|
1740 | |
---|
1741 | /// \brief Constructor |
---|
1742 | /// |
---|
1743 | /// Constructor |
---|
1744 | /// \param _digraph The digraph that the map belongs to. |
---|
1745 | explicit TargetMap(const Digraph& digraph) : _digraph(digraph) {} |
---|
1746 | |
---|
1747 | /// \brief The subscript operator. |
---|
1748 | /// |
---|
1749 | /// The subscript operator. |
---|
1750 | /// \param e The arc |
---|
1751 | /// \return The target of the arc |
---|
1752 | Value operator[](const Key& e) const { |
---|
1753 | return _digraph.target(e); |
---|
1754 | } |
---|
1755 | |
---|
1756 | private: |
---|
1757 | const Digraph& _digraph; |
---|
1758 | }; |
---|
1759 | |
---|
1760 | /// \brief Returns a \ref TargetMap class. |
---|
1761 | /// |
---|
1762 | /// This function just returns a \ref TargetMap class. |
---|
1763 | /// \relates TargetMap |
---|
1764 | template <typename Digraph> |
---|
1765 | inline TargetMap<Digraph> targetMap(const Digraph& digraph) { |
---|
1766 | return TargetMap<Digraph>(digraph); |
---|
1767 | } |
---|
1768 | |
---|
1769 | /// \brief Returns the "forward" directed arc view of an edge. |
---|
1770 | /// |
---|
1771 | /// Returns the "forward" directed arc view of an edge. |
---|
1772 | /// \see BackwardMap |
---|
1773 | /// \author Balazs Dezso |
---|
1774 | template <typename Graph> |
---|
1775 | class ForwardMap { |
---|
1776 | public: |
---|
1777 | |
---|
1778 | typedef typename Graph::Arc Value; |
---|
1779 | typedef typename Graph::Edge Key; |
---|
1780 | |
---|
1781 | /// \brief Constructor |
---|
1782 | /// |
---|
1783 | /// Constructor |
---|
1784 | /// \param _graph The graph that the map belongs to. |
---|
1785 | explicit ForwardMap(const Graph& graph) : _graph(graph) {} |
---|
1786 | |
---|
1787 | /// \brief The subscript operator. |
---|
1788 | /// |
---|
1789 | /// The subscript operator. |
---|
1790 | /// \param key An edge |
---|
1791 | /// \return The "forward" directed arc view of edge |
---|
1792 | Value operator[](const Key& key) const { |
---|
1793 | return _graph.direct(key, true); |
---|
1794 | } |
---|
1795 | |
---|
1796 | private: |
---|
1797 | const Graph& _graph; |
---|
1798 | }; |
---|
1799 | |
---|
1800 | /// \brief Returns a \ref ForwardMap class. |
---|
1801 | /// |
---|
1802 | /// This function just returns an \ref ForwardMap class. |
---|
1803 | /// \relates ForwardMap |
---|
1804 | template <typename Graph> |
---|
1805 | inline ForwardMap<Graph> forwardMap(const Graph& graph) { |
---|
1806 | return ForwardMap<Graph>(graph); |
---|
1807 | } |
---|
1808 | |
---|
1809 | /// \brief Returns the "backward" directed arc view of an edge. |
---|
1810 | /// |
---|
1811 | /// Returns the "backward" directed arc view of an edge. |
---|
1812 | /// \see ForwardMap |
---|
1813 | /// \author Balazs Dezso |
---|
1814 | template <typename Graph> |
---|
1815 | class BackwardMap { |
---|
1816 | public: |
---|
1817 | |
---|
1818 | typedef typename Graph::Arc Value; |
---|
1819 | typedef typename Graph::Edge Key; |
---|
1820 | |
---|
1821 | /// \brief Constructor |
---|
1822 | /// |
---|
1823 | /// Constructor |
---|
1824 | /// \param _graph The graph that the map belongs to. |
---|
1825 | explicit BackwardMap(const Graph& graph) : _graph(graph) {} |
---|
1826 | |
---|
1827 | /// \brief The subscript operator. |
---|
1828 | /// |
---|
1829 | /// The subscript operator. |
---|
1830 | /// \param key An edge |
---|
1831 | /// \return The "backward" directed arc view of edge |
---|
1832 | Value operator[](const Key& key) const { |
---|
1833 | return _graph.direct(key, false); |
---|
1834 | } |
---|
1835 | |
---|
1836 | private: |
---|
1837 | const Graph& _graph; |
---|
1838 | }; |
---|
1839 | |
---|
1840 | /// \brief Returns a \ref BackwardMap class |
---|
1841 | |
---|
1842 | /// This function just returns a \ref BackwardMap class. |
---|
1843 | /// \relates BackwardMap |
---|
1844 | template <typename Graph> |
---|
1845 | inline BackwardMap<Graph> backwardMap(const Graph& graph) { |
---|
1846 | return BackwardMap<Graph>(graph); |
---|
1847 | } |
---|
1848 | |
---|
1849 | /// \brief Potential difference map |
---|
1850 | /// |
---|
1851 | /// If there is an potential map on the nodes then we |
---|
1852 | /// can get an arc map as we get the substraction of the |
---|
1853 | /// values of the target and source. |
---|
1854 | template <typename Digraph, typename NodeMap> |
---|
1855 | class PotentialDifferenceMap { |
---|
1856 | public: |
---|
1857 | typedef typename Digraph::Arc Key; |
---|
1858 | typedef typename NodeMap::Value Value; |
---|
1859 | |
---|
1860 | /// \brief Constructor |
---|
1861 | /// |
---|
1862 | /// Contructor of the map |
---|
1863 | explicit PotentialDifferenceMap(const Digraph& digraph, |
---|
1864 | const NodeMap& potential) |
---|
1865 | : _digraph(digraph), _potential(potential) {} |
---|
1866 | |
---|
1867 | /// \brief Const subscription operator |
---|
1868 | /// |
---|
1869 | /// Const subscription operator |
---|
1870 | Value operator[](const Key& arc) const { |
---|
1871 | return _potential[_digraph.target(arc)] - |
---|
1872 | _potential[_digraph.source(arc)]; |
---|
1873 | } |
---|
1874 | |
---|
1875 | private: |
---|
1876 | const Digraph& _digraph; |
---|
1877 | const NodeMap& _potential; |
---|
1878 | }; |
---|
1879 | |
---|
1880 | /// \brief Returns a PotentialDifferenceMap. |
---|
1881 | /// |
---|
1882 | /// This function just returns a PotentialDifferenceMap. |
---|
1883 | /// \relates PotentialDifferenceMap |
---|
1884 | template <typename Digraph, typename NodeMap> |
---|
1885 | PotentialDifferenceMap<Digraph, NodeMap> |
---|
1886 | potentialDifferenceMap(const Digraph& digraph, const NodeMap& potential) { |
---|
1887 | return PotentialDifferenceMap<Digraph, NodeMap>(digraph, potential); |
---|
1888 | } |
---|
1889 | |
---|
1890 | /// \brief Map of the node in-degrees. |
---|
1891 | /// |
---|
1892 | /// This map returns the in-degree of a node. Once it is constructed, |
---|
1893 | /// the degrees are stored in a standard NodeMap, so each query is done |
---|
1894 | /// in constant time. On the other hand, the values are updated automatically |
---|
1895 | /// whenever the digraph changes. |
---|
1896 | /// |
---|
1897 | /// \warning Besides addNode() and addArc(), a digraph structure may provide |
---|
1898 | /// alternative ways to modify the digraph. The correct behavior of InDegMap |
---|
1899 | /// is not guarantied if these additional features are used. For example |
---|
1900 | /// the functions \ref ListDigraph::changeSource() "changeSource()", |
---|
1901 | /// \ref ListDigraph::changeTarget() "changeTarget()" and |
---|
1902 | /// \ref ListDigraph::reverseArc() "reverseArc()" |
---|
1903 | /// of \ref ListDigraph will \e not update the degree values correctly. |
---|
1904 | /// |
---|
1905 | /// \sa OutDegMap |
---|
1906 | |
---|
1907 | template <typename _Digraph> |
---|
1908 | class InDegMap |
---|
1909 | : protected ItemSetTraits<_Digraph, typename _Digraph::Arc> |
---|
1910 | ::ItemNotifier::ObserverBase { |
---|
1911 | |
---|
1912 | public: |
---|
1913 | |
---|
1914 | typedef _Digraph Digraph; |
---|
1915 | typedef int Value; |
---|
1916 | typedef typename Digraph::Node Key; |
---|
1917 | |
---|
1918 | typedef typename ItemSetTraits<Digraph, typename Digraph::Arc> |
---|
1919 | ::ItemNotifier::ObserverBase Parent; |
---|
1920 | |
---|
1921 | private: |
---|
1922 | |
---|
1923 | class AutoNodeMap : public DefaultMap<Digraph, Key, int> { |
---|
1924 | public: |
---|
1925 | |
---|
1926 | typedef DefaultMap<Digraph, Key, int> Parent; |
---|
1927 | |
---|
1928 | AutoNodeMap(const Digraph& digraph) : Parent(digraph, 0) {} |
---|
1929 | |
---|
1930 | virtual void add(const Key& key) { |
---|
1931 | Parent::add(key); |
---|
1932 | Parent::set(key, 0); |
---|
1933 | } |
---|
1934 | |
---|
1935 | virtual void add(const std::vector<Key>& keys) { |
---|
1936 | Parent::add(keys); |
---|
1937 | for (int i = 0; i < int(keys.size()); ++i) { |
---|
1938 | Parent::set(keys[i], 0); |
---|
1939 | } |
---|
1940 | } |
---|
1941 | |
---|
1942 | virtual void build() { |
---|
1943 | Parent::build(); |
---|
1944 | Key it; |
---|
1945 | typename Parent::Notifier* nf = Parent::notifier(); |
---|
1946 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
1947 | Parent::set(it, 0); |
---|
1948 | } |
---|
1949 | } |
---|
1950 | }; |
---|
1951 | |
---|
1952 | public: |
---|
1953 | |
---|
1954 | /// \brief Constructor. |
---|
1955 | /// |
---|
1956 | /// Constructor for creating in-degree map. |
---|
1957 | explicit InDegMap(const Digraph& digraph) |
---|
1958 | : _digraph(digraph), _deg(digraph) { |
---|
1959 | Parent::attach(_digraph.notifier(typename Digraph::Arc())); |
---|
1960 | |
---|
1961 | for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) { |
---|
1962 | _deg[it] = countInArcs(_digraph, it); |
---|
1963 | } |
---|
1964 | } |
---|
1965 | |
---|
1966 | /// Gives back the in-degree of a Node. |
---|
1967 | int operator[](const Key& key) const { |
---|
1968 | return _deg[key]; |
---|
1969 | } |
---|
1970 | |
---|
1971 | protected: |
---|
1972 | |
---|
1973 | typedef typename Digraph::Arc Arc; |
---|
1974 | |
---|
1975 | virtual void add(const Arc& arc) { |
---|
1976 | ++_deg[_digraph.target(arc)]; |
---|
1977 | } |
---|
1978 | |
---|
1979 | virtual void add(const std::vector<Arc>& arcs) { |
---|
1980 | for (int i = 0; i < int(arcs.size()); ++i) { |
---|
1981 | ++_deg[_digraph.target(arcs[i])]; |
---|
1982 | } |
---|
1983 | } |
---|
1984 | |
---|
1985 | virtual void erase(const Arc& arc) { |
---|
1986 | --_deg[_digraph.target(arc)]; |
---|
1987 | } |
---|
1988 | |
---|
1989 | virtual void erase(const std::vector<Arc>& arcs) { |
---|
1990 | for (int i = 0; i < int(arcs.size()); ++i) { |
---|
1991 | --_deg[_digraph.target(arcs[i])]; |
---|
1992 | } |
---|
1993 | } |
---|
1994 | |
---|
1995 | virtual void build() { |
---|
1996 | for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) { |
---|
1997 | _deg[it] = countInArcs(_digraph, it); |
---|
1998 | } |
---|
1999 | } |
---|
2000 | |
---|
2001 | virtual void clear() { |
---|
2002 | for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) { |
---|
2003 | _deg[it] = 0; |
---|
2004 | } |
---|
2005 | } |
---|
2006 | private: |
---|
2007 | |
---|
2008 | const Digraph& _digraph; |
---|
2009 | AutoNodeMap _deg; |
---|
2010 | }; |
---|
2011 | |
---|
2012 | /// \brief Map of the node out-degrees. |
---|
2013 | /// |
---|
2014 | /// This map returns the out-degree of a node. Once it is constructed, |
---|
2015 | /// the degrees are stored in a standard NodeMap, so each query is done |
---|
2016 | /// in constant time. On the other hand, the values are updated automatically |
---|
2017 | /// whenever the digraph changes. |
---|
2018 | /// |
---|
2019 | /// \warning Besides addNode() and addArc(), a digraph structure may provide |
---|
2020 | /// alternative ways to modify the digraph. The correct behavior of OutDegMap |
---|
2021 | /// is not guarantied if these additional features are used. For example |
---|
2022 | /// the functions \ref ListDigraph::changeSource() "changeSource()", |
---|
2023 | /// \ref ListDigraph::changeTarget() "changeTarget()" and |
---|
2024 | /// \ref ListDigraph::reverseArc() "reverseArc()" |
---|
2025 | /// of \ref ListDigraph will \e not update the degree values correctly. |
---|
2026 | /// |
---|
2027 | /// \sa InDegMap |
---|
2028 | |
---|
2029 | template <typename _Digraph> |
---|
2030 | class OutDegMap |
---|
2031 | : protected ItemSetTraits<_Digraph, typename _Digraph::Arc> |
---|
2032 | ::ItemNotifier::ObserverBase { |
---|
2033 | |
---|
2034 | public: |
---|
2035 | |
---|
2036 | typedef _Digraph Digraph; |
---|
2037 | typedef int Value; |
---|
2038 | typedef typename Digraph::Node Key; |
---|
2039 | |
---|
2040 | typedef typename ItemSetTraits<Digraph, typename Digraph::Arc> |
---|
2041 | ::ItemNotifier::ObserverBase Parent; |
---|
2042 | |
---|
2043 | private: |
---|
2044 | |
---|
2045 | class AutoNodeMap : public DefaultMap<Digraph, Key, int> { |
---|
2046 | public: |
---|
2047 | |
---|
2048 | typedef DefaultMap<Digraph, Key, int> Parent; |
---|
2049 | |
---|
2050 | AutoNodeMap(const Digraph& digraph) : Parent(digraph, 0) {} |
---|
2051 | |
---|
2052 | virtual void add(const Key& key) { |
---|
2053 | Parent::add(key); |
---|
2054 | Parent::set(key, 0); |
---|
2055 | } |
---|
2056 | virtual void add(const std::vector<Key>& keys) { |
---|
2057 | Parent::add(keys); |
---|
2058 | for (int i = 0; i < int(keys.size()); ++i) { |
---|
2059 | Parent::set(keys[i], 0); |
---|
2060 | } |
---|
2061 | } |
---|
2062 | virtual void build() { |
---|
2063 | Parent::build(); |
---|
2064 | Key it; |
---|
2065 | typename Parent::Notifier* nf = Parent::notifier(); |
---|
2066 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
2067 | Parent::set(it, 0); |
---|
2068 | } |
---|
2069 | } |
---|
2070 | }; |
---|
2071 | |
---|
2072 | public: |
---|
2073 | |
---|
2074 | /// \brief Constructor. |
---|
2075 | /// |
---|
2076 | /// Constructor for creating out-degree map. |
---|
2077 | explicit OutDegMap(const Digraph& digraph) |
---|
2078 | : _digraph(digraph), _deg(digraph) { |
---|
2079 | Parent::attach(_digraph.notifier(typename Digraph::Arc())); |
---|
2080 | |
---|
2081 | for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) { |
---|
2082 | _deg[it] = countOutArcs(_digraph, it); |
---|
2083 | } |
---|
2084 | } |
---|
2085 | |
---|
2086 | /// Gives back the out-degree of a Node. |
---|
2087 | int operator[](const Key& key) const { |
---|
2088 | return _deg[key]; |
---|
2089 | } |
---|
2090 | |
---|
2091 | protected: |
---|
2092 | |
---|
2093 | typedef typename Digraph::Arc Arc; |
---|
2094 | |
---|
2095 | virtual void add(const Arc& arc) { |
---|
2096 | ++_deg[_digraph.source(arc)]; |
---|
2097 | } |
---|
2098 | |
---|
2099 | virtual void add(const std::vector<Arc>& arcs) { |
---|
2100 | for (int i = 0; i < int(arcs.size()); ++i) { |
---|
2101 | ++_deg[_digraph.source(arcs[i])]; |
---|
2102 | } |
---|
2103 | } |
---|
2104 | |
---|
2105 | virtual void erase(const Arc& arc) { |
---|
2106 | --_deg[_digraph.source(arc)]; |
---|
2107 | } |
---|
2108 | |
---|
2109 | virtual void erase(const std::vector<Arc>& arcs) { |
---|
2110 | for (int i = 0; i < int(arcs.size()); ++i) { |
---|
2111 | --_deg[_digraph.source(arcs[i])]; |
---|
2112 | } |
---|
2113 | } |
---|
2114 | |
---|
2115 | virtual void build() { |
---|
2116 | for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) { |
---|
2117 | _deg[it] = countOutArcs(_digraph, it); |
---|
2118 | } |
---|
2119 | } |
---|
2120 | |
---|
2121 | virtual void clear() { |
---|
2122 | for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) { |
---|
2123 | _deg[it] = 0; |
---|
2124 | } |
---|
2125 | } |
---|
2126 | private: |
---|
2127 | |
---|
2128 | const Digraph& _digraph; |
---|
2129 | AutoNodeMap _deg; |
---|
2130 | }; |
---|
2131 | |
---|
2132 | |
---|
2133 | ///Dynamic arc look up between given endpoints. |
---|
2134 | |
---|
2135 | ///\ingroup gutils |
---|
2136 | ///Using this class, you can find an arc in a digraph from a given |
---|
2137 | ///source to a given target in amortized time <em>O(log d)</em>, |
---|
2138 | ///where <em>d</em> is the out-degree of the source node. |
---|
2139 | /// |
---|
2140 | ///It is possible to find \e all parallel arcs between two nodes with |
---|
2141 | ///the \c findFirst() and \c findNext() members. |
---|
2142 | /// |
---|
2143 | ///See the \ref ArcLookUp and \ref AllArcLookUp classes if your |
---|
2144 | ///digraph is not changed so frequently. |
---|
2145 | /// |
---|
2146 | ///This class uses a self-adjusting binary search tree, Sleator's |
---|
2147 | ///and Tarjan's Splay tree for guarantee the logarithmic amortized |
---|
2148 | ///time bound for arc lookups. This class also guarantees the |
---|
2149 | ///optimal time bound in a constant factor for any distribution of |
---|
2150 | ///queries. |
---|
2151 | /// |
---|
2152 | ///\param G The type of the underlying digraph. |
---|
2153 | /// |
---|
2154 | ///\sa ArcLookUp |
---|
2155 | ///\sa AllArcLookUp |
---|
2156 | template<class G> |
---|
2157 | class DynArcLookUp |
---|
2158 | : protected ItemSetTraits<G, typename G::Arc>::ItemNotifier::ObserverBase |
---|
2159 | { |
---|
2160 | public: |
---|
2161 | typedef typename ItemSetTraits<G, typename G::Arc> |
---|
2162 | ::ItemNotifier::ObserverBase Parent; |
---|
2163 | |
---|
2164 | DIGRAPH_TYPEDEFS(G); |
---|
2165 | typedef G Digraph; |
---|
2166 | |
---|
2167 | protected: |
---|
2168 | |
---|
2169 | class AutoNodeMap : public DefaultMap<G, Node, Arc> { |
---|
2170 | public: |
---|
2171 | |
---|
2172 | typedef DefaultMap<G, Node, Arc> Parent; |
---|
2173 | |
---|
2174 | AutoNodeMap(const G& digraph) : Parent(digraph, INVALID) {} |
---|
2175 | |
---|
2176 | virtual void add(const Node& node) { |
---|
2177 | Parent::add(node); |
---|
2178 | Parent::set(node, INVALID); |
---|
2179 | } |
---|
2180 | |
---|
2181 | virtual void add(const std::vector<Node>& nodes) { |
---|
2182 | Parent::add(nodes); |
---|
2183 | for (int i = 0; i < int(nodes.size()); ++i) { |
---|
2184 | Parent::set(nodes[i], INVALID); |
---|
2185 | } |
---|
2186 | } |
---|
2187 | |
---|
2188 | virtual void build() { |
---|
2189 | Parent::build(); |
---|
2190 | Node it; |
---|
2191 | typename Parent::Notifier* nf = Parent::notifier(); |
---|
2192 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
2193 | Parent::set(it, INVALID); |
---|
2194 | } |
---|
2195 | } |
---|
2196 | }; |
---|
2197 | |
---|
2198 | const Digraph &_g; |
---|
2199 | AutoNodeMap _head; |
---|
2200 | typename Digraph::template ArcMap<Arc> _parent; |
---|
2201 | typename Digraph::template ArcMap<Arc> _left; |
---|
2202 | typename Digraph::template ArcMap<Arc> _right; |
---|
2203 | |
---|
2204 | class ArcLess { |
---|
2205 | const Digraph &g; |
---|
2206 | public: |
---|
2207 | ArcLess(const Digraph &_g) : g(_g) {} |
---|
2208 | bool operator()(Arc a,Arc b) const |
---|
2209 | { |
---|
2210 | return g.target(a)<g.target(b); |
---|
2211 | } |
---|
2212 | }; |
---|
2213 | |
---|
2214 | public: |
---|
2215 | |
---|
2216 | ///Constructor |
---|
2217 | |
---|
2218 | ///Constructor. |
---|
2219 | /// |
---|
2220 | ///It builds up the search database. |
---|
2221 | DynArcLookUp(const Digraph &g) |
---|
2222 | : _g(g),_head(g),_parent(g),_left(g),_right(g) |
---|
2223 | { |
---|
2224 | Parent::attach(_g.notifier(typename Digraph::Arc())); |
---|
2225 | refresh(); |
---|
2226 | } |
---|
2227 | |
---|
2228 | protected: |
---|
2229 | |
---|
2230 | virtual void add(const Arc& arc) { |
---|
2231 | insert(arc); |
---|
2232 | } |
---|
2233 | |
---|
2234 | virtual void add(const std::vector<Arc>& arcs) { |
---|
2235 | for (int i = 0; i < int(arcs.size()); ++i) { |
---|
2236 | insert(arcs[i]); |
---|
2237 | } |
---|
2238 | } |
---|
2239 | |
---|
2240 | virtual void erase(const Arc& arc) { |
---|
2241 | remove(arc); |
---|
2242 | } |
---|
2243 | |
---|
2244 | virtual void erase(const std::vector<Arc>& arcs) { |
---|
2245 | for (int i = 0; i < int(arcs.size()); ++i) { |
---|
2246 | remove(arcs[i]); |
---|
2247 | } |
---|
2248 | } |
---|
2249 | |
---|
2250 | virtual void build() { |
---|
2251 | refresh(); |
---|
2252 | } |
---|
2253 | |
---|
2254 | virtual void clear() { |
---|
2255 | for(NodeIt n(_g);n!=INVALID;++n) { |
---|
2256 | _head.set(n, INVALID); |
---|
2257 | } |
---|
2258 | } |
---|
2259 | |
---|
2260 | void insert(Arc arc) { |
---|
2261 | Node s = _g.source(arc); |
---|
2262 | Node t = _g.target(arc); |
---|
2263 | _left.set(arc, INVALID); |
---|
2264 | _right.set(arc, INVALID); |
---|
2265 | |
---|
2266 | Arc e = _head[s]; |
---|
2267 | if (e == INVALID) { |
---|
2268 | _head.set(s, arc); |
---|
2269 | _parent.set(arc, INVALID); |
---|
2270 | return; |
---|
2271 | } |
---|
2272 | while (true) { |
---|
2273 | if (t < _g.target(e)) { |
---|
2274 | if (_left[e] == INVALID) { |
---|
2275 | _left.set(e, arc); |
---|
2276 | _parent.set(arc, e); |
---|
2277 | splay(arc); |
---|
2278 | return; |
---|
2279 | } else { |
---|
2280 | e = _left[e]; |
---|
2281 | } |
---|
2282 | } else { |
---|
2283 | if (_right[e] == INVALID) { |
---|
2284 | _right.set(e, arc); |
---|
2285 | _parent.set(arc, e); |
---|
2286 | splay(arc); |
---|
2287 | return; |
---|
2288 | } else { |
---|
2289 | e = _right[e]; |
---|
2290 | } |
---|
2291 | } |
---|
2292 | } |
---|
2293 | } |
---|
2294 | |
---|
2295 | void remove(Arc arc) { |
---|
2296 | if (_left[arc] == INVALID) { |
---|
2297 | if (_right[arc] != INVALID) { |
---|
2298 | _parent.set(_right[arc], _parent[arc]); |
---|
2299 | } |
---|
2300 | if (_parent[arc] != INVALID) { |
---|
2301 | if (_left[_parent[arc]] == arc) { |
---|
2302 | _left.set(_parent[arc], _right[arc]); |
---|
2303 | } else { |
---|
2304 | _right.set(_parent[arc], _right[arc]); |
---|
2305 | } |
---|
2306 | } else { |
---|
2307 | _head.set(_g.source(arc), _right[arc]); |
---|
2308 | } |
---|
2309 | } else if (_right[arc] == INVALID) { |
---|
2310 | _parent.set(_left[arc], _parent[arc]); |
---|
2311 | if (_parent[arc] != INVALID) { |
---|
2312 | if (_left[_parent[arc]] == arc) { |
---|
2313 | _left.set(_parent[arc], _left[arc]); |
---|
2314 | } else { |
---|
2315 | _right.set(_parent[arc], _left[arc]); |
---|
2316 | } |
---|
2317 | } else { |
---|
2318 | _head.set(_g.source(arc), _left[arc]); |
---|
2319 | } |
---|
2320 | } else { |
---|
2321 | Arc e = _left[arc]; |
---|
2322 | if (_right[e] != INVALID) { |
---|
2323 | e = _right[e]; |
---|
2324 | while (_right[e] != INVALID) { |
---|
2325 | e = _right[e]; |
---|
2326 | } |
---|
2327 | Arc s = _parent[e]; |
---|
2328 | _right.set(_parent[e], _left[e]); |
---|
2329 | if (_left[e] != INVALID) { |
---|
2330 | _parent.set(_left[e], _parent[e]); |
---|
2331 | } |
---|
2332 | |
---|
2333 | _left.set(e, _left[arc]); |
---|
2334 | _parent.set(_left[arc], e); |
---|
2335 | _right.set(e, _right[arc]); |
---|
2336 | _parent.set(_right[arc], e); |
---|
2337 | |
---|
2338 | _parent.set(e, _parent[arc]); |
---|
2339 | if (_parent[arc] != INVALID) { |
---|
2340 | if (_left[_parent[arc]] == arc) { |
---|
2341 | _left.set(_parent[arc], e); |
---|
2342 | } else { |
---|
2343 | _right.set(_parent[arc], e); |
---|
2344 | } |
---|
2345 | } |
---|
2346 | splay(s); |
---|
2347 | } else { |
---|
2348 | _right.set(e, _right[arc]); |
---|
2349 | _parent.set(_right[arc], e); |
---|
2350 | |
---|
2351 | if (_parent[arc] != INVALID) { |
---|
2352 | if (_left[_parent[arc]] == arc) { |
---|
2353 | _left.set(_parent[arc], e); |
---|
2354 | } else { |
---|
2355 | _right.set(_parent[arc], e); |
---|
2356 | } |
---|
2357 | } else { |
---|
2358 | _head.set(_g.source(arc), e); |
---|
2359 | } |
---|
2360 | } |
---|
2361 | } |
---|
2362 | } |
---|
2363 | |
---|
2364 | Arc refreshRec(std::vector<Arc> &v,int a,int b) |
---|
2365 | { |
---|
2366 | int m=(a+b)/2; |
---|
2367 | Arc me=v[m]; |
---|
2368 | if (a < m) { |
---|
2369 | Arc left = refreshRec(v,a,m-1); |
---|
2370 | _left.set(me, left); |
---|
2371 | _parent.set(left, me); |
---|
2372 | } else { |
---|
2373 | _left.set(me, INVALID); |
---|
2374 | } |
---|
2375 | if (m < b) { |
---|
2376 | Arc right = refreshRec(v,m+1,b); |
---|
2377 | _right.set(me, right); |
---|
2378 | _parent.set(right, me); |
---|
2379 | } else { |
---|
2380 | _right.set(me, INVALID); |
---|
2381 | } |
---|
2382 | return me; |
---|
2383 | } |
---|
2384 | |
---|
2385 | void refresh() { |
---|
2386 | for(NodeIt n(_g);n!=INVALID;++n) { |
---|
2387 | std::vector<Arc> v; |
---|
2388 | for(OutArcIt e(_g,n);e!=INVALID;++e) v.push_back(e); |
---|
2389 | if(v.size()) { |
---|
2390 | std::sort(v.begin(),v.end(),ArcLess(_g)); |
---|
2391 | Arc head = refreshRec(v,0,v.size()-1); |
---|
2392 | _head.set(n, head); |
---|
2393 | _parent.set(head, INVALID); |
---|
2394 | } |
---|
2395 | else _head.set(n, INVALID); |
---|
2396 | } |
---|
2397 | } |
---|
2398 | |
---|
2399 | void zig(Arc v) { |
---|
2400 | Arc w = _parent[v]; |
---|
2401 | _parent.set(v, _parent[w]); |
---|
2402 | _parent.set(w, v); |
---|
2403 | _left.set(w, _right[v]); |
---|
2404 | _right.set(v, w); |
---|
2405 | if (_parent[v] != INVALID) { |
---|
2406 | if (_right[_parent[v]] == w) { |
---|
2407 | _right.set(_parent[v], v); |
---|
2408 | } else { |
---|
2409 | _left.set(_parent[v], v); |
---|
2410 | } |
---|
2411 | } |
---|
2412 | if (_left[w] != INVALID){ |
---|
2413 | _parent.set(_left[w], w); |
---|
2414 | } |
---|
2415 | } |
---|
2416 | |
---|
2417 | void zag(Arc v) { |
---|
2418 | Arc w = _parent[v]; |
---|
2419 | _parent.set(v, _parent[w]); |
---|
2420 | _parent.set(w, v); |
---|
2421 | _right.set(w, _left[v]); |
---|
2422 | _left.set(v, w); |
---|
2423 | if (_parent[v] != INVALID){ |
---|
2424 | if (_left[_parent[v]] == w) { |
---|
2425 | _left.set(_parent[v], v); |
---|
2426 | } else { |
---|
2427 | _right.set(_parent[v], v); |
---|
2428 | } |
---|
2429 | } |
---|
2430 | if (_right[w] != INVALID){ |
---|
2431 | _parent.set(_right[w], w); |
---|
2432 | } |
---|
2433 | } |
---|
2434 | |
---|
2435 | void splay(Arc v) { |
---|
2436 | while (_parent[v] != INVALID) { |
---|
2437 | if (v == _left[_parent[v]]) { |
---|
2438 | if (_parent[_parent[v]] == INVALID) { |
---|
2439 | zig(v); |
---|
2440 | } else { |
---|
2441 | if (_parent[v] == _left[_parent[_parent[v]]]) { |
---|
2442 | zig(_parent[v]); |
---|
2443 | zig(v); |
---|
2444 | } else { |
---|
2445 | zig(v); |
---|
2446 | zag(v); |
---|
2447 | } |
---|
2448 | } |
---|
2449 | } else { |
---|
2450 | if (_parent[_parent[v]] == INVALID) { |
---|
2451 | zag(v); |
---|
2452 | } else { |
---|
2453 | if (_parent[v] == _left[_parent[_parent[v]]]) { |
---|
2454 | zag(v); |
---|
2455 | zig(v); |
---|
2456 | } else { |
---|
2457 | zag(_parent[v]); |
---|
2458 | zag(v); |
---|
2459 | } |
---|
2460 | } |
---|
2461 | } |
---|
2462 | } |
---|
2463 | _head[_g.source(v)] = v; |
---|
2464 | } |
---|
2465 | |
---|
2466 | |
---|
2467 | public: |
---|
2468 | |
---|
2469 | ///Find an arc between two nodes. |
---|
2470 | |
---|
2471 | ///Find an arc between two nodes in time <em>O(</em>log<em>d)</em>, where |
---|
2472 | /// <em>d</em> is the number of outgoing arcs of \c s. |
---|
2473 | ///\param s The source node |
---|
2474 | ///\param t The target node |
---|
2475 | ///\return An arc from \c s to \c t if there exists, |
---|
2476 | ///\ref INVALID otherwise. |
---|
2477 | Arc operator()(Node s, Node t) const |
---|
2478 | { |
---|
2479 | Arc a = _head[s]; |
---|
2480 | while (true) { |
---|
2481 | if (_g.target(a) == t) { |
---|
2482 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
2483 | return a; |
---|
2484 | } else if (t < _g.target(a)) { |
---|
2485 | if (_left[a] == INVALID) { |
---|
2486 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
2487 | return INVALID; |
---|
2488 | } else { |
---|
2489 | a = _left[a]; |
---|
2490 | } |
---|
2491 | } else { |
---|
2492 | if (_right[a] == INVALID) { |
---|
2493 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
2494 | return INVALID; |
---|
2495 | } else { |
---|
2496 | a = _right[a]; |
---|
2497 | } |
---|
2498 | } |
---|
2499 | } |
---|
2500 | } |
---|
2501 | |
---|
2502 | ///Find the first arc between two nodes. |
---|
2503 | |
---|
2504 | ///Find the first arc between two nodes in time |
---|
2505 | /// <em>O(</em>log<em>d)</em>, where <em>d</em> is the number of |
---|
2506 | /// outgoing arcs of \c s. |
---|
2507 | ///\param s The source node |
---|
2508 | ///\param t The target node |
---|
2509 | ///\return An arc from \c s to \c t if there exists, \ref INVALID |
---|
2510 | /// otherwise. |
---|
2511 | Arc findFirst(Node s, Node t) const |
---|
2512 | { |
---|
2513 | Arc a = _head[s]; |
---|
2514 | Arc r = INVALID; |
---|
2515 | while (true) { |
---|
2516 | if (_g.target(a) < t) { |
---|
2517 | if (_right[a] == INVALID) { |
---|
2518 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
2519 | return r; |
---|
2520 | } else { |
---|
2521 | a = _right[a]; |
---|
2522 | } |
---|
2523 | } else { |
---|
2524 | if (_g.target(a) == t) { |
---|
2525 | r = a; |
---|
2526 | } |
---|
2527 | if (_left[a] == INVALID) { |
---|
2528 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
2529 | return r; |
---|
2530 | } else { |
---|
2531 | a = _left[a]; |
---|
2532 | } |
---|
2533 | } |
---|
2534 | } |
---|
2535 | } |
---|
2536 | |
---|
2537 | ///Find the next arc between two nodes. |
---|
2538 | |
---|
2539 | ///Find the next arc between two nodes in time |
---|
2540 | /// <em>O(</em>log<em>d)</em>, where <em>d</em> is the number of |
---|
2541 | /// outgoing arcs of \c s. |
---|
2542 | ///\param s The source node |
---|
2543 | ///\param t The target node |
---|
2544 | ///\return An arc from \c s to \c t if there exists, \ref INVALID |
---|
2545 | /// otherwise. |
---|
2546 | |
---|
2547 | ///\note If \c e is not the result of the previous \c findFirst() |
---|
2548 | ///operation then the amorized time bound can not be guaranteed. |
---|
2549 | #ifdef DOXYGEN |
---|
2550 | Arc findNext(Node s, Node t, Arc a) const |
---|
2551 | #else |
---|
2552 | Arc findNext(Node, Node t, Arc a) const |
---|
2553 | #endif |
---|
2554 | { |
---|
2555 | if (_right[a] != INVALID) { |
---|
2556 | a = _right[a]; |
---|
2557 | while (_left[a] != INVALID) { |
---|
2558 | a = _left[a]; |
---|
2559 | } |
---|
2560 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
2561 | } else { |
---|
2562 | while (_parent[a] != INVALID && _right[_parent[a]] == a) { |
---|
2563 | a = _parent[a]; |
---|
2564 | } |
---|
2565 | if (_parent[a] == INVALID) { |
---|
2566 | return INVALID; |
---|
2567 | } else { |
---|
2568 | a = _parent[a]; |
---|
2569 | const_cast<DynArcLookUp&>(*this).splay(a); |
---|
2570 | } |
---|
2571 | } |
---|
2572 | if (_g.target(a) == t) return a; |
---|
2573 | else return INVALID; |
---|
2574 | } |
---|
2575 | |
---|
2576 | }; |
---|
2577 | |
---|
2578 | ///Fast arc look up between given endpoints. |
---|
2579 | |
---|
2580 | ///\ingroup gutils |
---|
2581 | ///Using this class, you can find an arc in a digraph from a given |
---|
2582 | ///source to a given target in time <em>O(log d)</em>, |
---|
2583 | ///where <em>d</em> is the out-degree of the source node. |
---|
2584 | /// |
---|
2585 | ///It is not possible to find \e all parallel arcs between two nodes. |
---|
2586 | ///Use \ref AllArcLookUp for this purpose. |
---|
2587 | /// |
---|
2588 | ///\warning This class is static, so you should refresh() (or at least |
---|
2589 | ///refresh(Node)) this data structure |
---|
2590 | ///whenever the digraph changes. This is a time consuming (superlinearly |
---|
2591 | ///proportional (<em>O(m</em>log<em>m)</em>) to the number of arcs). |
---|
2592 | /// |
---|
2593 | ///\param G The type of the underlying digraph. |
---|
2594 | /// |
---|
2595 | ///\sa DynArcLookUp |
---|
2596 | ///\sa AllArcLookUp |
---|
2597 | template<class G> |
---|
2598 | class ArcLookUp |
---|
2599 | { |
---|
2600 | public: |
---|
2601 | DIGRAPH_TYPEDEFS(G); |
---|
2602 | typedef G Digraph; |
---|
2603 | |
---|
2604 | protected: |
---|
2605 | const Digraph &_g; |
---|
2606 | typename Digraph::template NodeMap<Arc> _head; |
---|
2607 | typename Digraph::template ArcMap<Arc> _left; |
---|
2608 | typename Digraph::template ArcMap<Arc> _right; |
---|
2609 | |
---|
2610 | class ArcLess { |
---|
2611 | const Digraph &g; |
---|
2612 | public: |
---|
2613 | ArcLess(const Digraph &_g) : g(_g) {} |
---|
2614 | bool operator()(Arc a,Arc b) const |
---|
2615 | { |
---|
2616 | return g.target(a)<g.target(b); |
---|
2617 | } |
---|
2618 | }; |
---|
2619 | |
---|
2620 | public: |
---|
2621 | |
---|
2622 | ///Constructor |
---|
2623 | |
---|
2624 | ///Constructor. |
---|
2625 | /// |
---|
2626 | ///It builds up the search database, which remains valid until the digraph |
---|
2627 | ///changes. |
---|
2628 | ArcLookUp(const Digraph &g) :_g(g),_head(g),_left(g),_right(g) {refresh();} |
---|
2629 | |
---|
2630 | private: |
---|
2631 | Arc refreshRec(std::vector<Arc> &v,int a,int b) |
---|
2632 | { |
---|
2633 | int m=(a+b)/2; |
---|
2634 | Arc me=v[m]; |
---|
2635 | _left[me] = a<m?refreshRec(v,a,m-1):INVALID; |
---|
2636 | _right[me] = m<b?refreshRec(v,m+1,b):INVALID; |
---|
2637 | return me; |
---|
2638 | } |
---|
2639 | public: |
---|
2640 | ///Refresh the data structure at a node. |
---|
2641 | |
---|
2642 | ///Build up the search database of node \c n. |
---|
2643 | /// |
---|
2644 | ///It runs in time <em>O(d</em>log<em>d)</em>, where <em>d</em> is |
---|
2645 | ///the number of the outgoing arcs of \c n. |
---|
2646 | void refresh(Node n) |
---|
2647 | { |
---|
2648 | std::vector<Arc> v; |
---|
2649 | for(OutArcIt e(_g,n);e!=INVALID;++e) v.push_back(e); |
---|
2650 | if(v.size()) { |
---|
2651 | std::sort(v.begin(),v.end(),ArcLess(_g)); |
---|
2652 | _head[n]=refreshRec(v,0,v.size()-1); |
---|
2653 | } |
---|
2654 | else _head[n]=INVALID; |
---|
2655 | } |
---|
2656 | ///Refresh the full data structure. |
---|
2657 | |
---|
2658 | ///Build up the full search database. In fact, it simply calls |
---|
2659 | ///\ref refresh(Node) "refresh(n)" for each node \c n. |
---|
2660 | /// |
---|
2661 | ///It runs in time <em>O(m</em>log<em>D)</em>, where <em>m</em> is |
---|
2662 | ///the number of the arcs of \c n and <em>D</em> is the maximum |
---|
2663 | ///out-degree of the digraph. |
---|
2664 | |
---|
2665 | void refresh() |
---|
2666 | { |
---|
2667 | for(NodeIt n(_g);n!=INVALID;++n) refresh(n); |
---|
2668 | } |
---|
2669 | |
---|
2670 | ///Find an arc between two nodes. |
---|
2671 | |
---|
2672 | ///Find an arc between two nodes in time <em>O(</em>log<em>d)</em>, where |
---|
2673 | /// <em>d</em> is the number of outgoing arcs of \c s. |
---|
2674 | ///\param s The source node |
---|
2675 | ///\param t The target node |
---|
2676 | ///\return An arc from \c s to \c t if there exists, |
---|
2677 | ///\ref INVALID otherwise. |
---|
2678 | /// |
---|
2679 | ///\warning If you change the digraph, refresh() must be called before using |
---|
2680 | ///this operator. If you change the outgoing arcs of |
---|
2681 | ///a single node \c n, then |
---|
2682 | ///\ref refresh(Node) "refresh(n)" is enough. |
---|
2683 | /// |
---|
2684 | Arc operator()(Node s, Node t) const |
---|
2685 | { |
---|
2686 | Arc e; |
---|
2687 | for(e=_head[s]; |
---|
2688 | e!=INVALID&&_g.target(e)!=t; |
---|
2689 | e = t < _g.target(e)?_left[e]:_right[e]) ; |
---|
2690 | return e; |
---|
2691 | } |
---|
2692 | |
---|
2693 | }; |
---|
2694 | |
---|
2695 | ///Fast look up of all arcs between given endpoints. |
---|
2696 | |
---|
2697 | ///\ingroup gutils |
---|
2698 | ///This class is the same as \ref ArcLookUp, with the addition |
---|
2699 | ///that it makes it possible to find all arcs between given endpoints. |
---|
2700 | /// |
---|
2701 | ///\warning This class is static, so you should refresh() (or at least |
---|
2702 | ///refresh(Node)) this data structure |
---|
2703 | ///whenever the digraph changes. This is a time consuming (superlinearly |
---|
2704 | ///proportional (<em>O(m</em>log<em>m)</em>) to the number of arcs). |
---|
2705 | /// |
---|
2706 | ///\param G The type of the underlying digraph. |
---|
2707 | /// |
---|
2708 | ///\sa DynArcLookUp |
---|
2709 | ///\sa ArcLookUp |
---|
2710 | template<class G> |
---|
2711 | class AllArcLookUp : public ArcLookUp<G> |
---|
2712 | { |
---|
2713 | using ArcLookUp<G>::_g; |
---|
2714 | using ArcLookUp<G>::_right; |
---|
2715 | using ArcLookUp<G>::_left; |
---|
2716 | using ArcLookUp<G>::_head; |
---|
2717 | |
---|
2718 | DIGRAPH_TYPEDEFS(G); |
---|
2719 | typedef G Digraph; |
---|
2720 | |
---|
2721 | typename Digraph::template ArcMap<Arc> _next; |
---|
2722 | |
---|
2723 | Arc refreshNext(Arc head,Arc next=INVALID) |
---|
2724 | { |
---|
2725 | if(head==INVALID) return next; |
---|
2726 | else { |
---|
2727 | next=refreshNext(_right[head],next); |
---|
2728 | // _next[head]=next; |
---|
2729 | _next[head]=( next!=INVALID && _g.target(next)==_g.target(head)) |
---|
2730 | ? next : INVALID; |
---|
2731 | return refreshNext(_left[head],head); |
---|
2732 | } |
---|
2733 | } |
---|
2734 | |
---|
2735 | void refreshNext() |
---|
2736 | { |
---|
2737 | for(NodeIt n(_g);n!=INVALID;++n) refreshNext(_head[n]); |
---|
2738 | } |
---|
2739 | |
---|
2740 | public: |
---|
2741 | ///Constructor |
---|
2742 | |
---|
2743 | ///Constructor. |
---|
2744 | /// |
---|
2745 | ///It builds up the search database, which remains valid until the digraph |
---|
2746 | ///changes. |
---|
2747 | AllArcLookUp(const Digraph &g) : ArcLookUp<G>(g), _next(g) {refreshNext();} |
---|
2748 | |
---|
2749 | ///Refresh the data structure at a node. |
---|
2750 | |
---|
2751 | ///Build up the search database of node \c n. |
---|
2752 | /// |
---|
2753 | ///It runs in time <em>O(d</em>log<em>d)</em>, where <em>d</em> is |
---|
2754 | ///the number of the outgoing arcs of \c n. |
---|
2755 | |
---|
2756 | void refresh(Node n) |
---|
2757 | { |
---|
2758 | ArcLookUp<G>::refresh(n); |
---|
2759 | refreshNext(_head[n]); |
---|
2760 | } |
---|
2761 | |
---|
2762 | ///Refresh the full data structure. |
---|
2763 | |
---|
2764 | ///Build up the full search database. In fact, it simply calls |
---|
2765 | ///\ref refresh(Node) "refresh(n)" for each node \c n. |
---|
2766 | /// |
---|
2767 | ///It runs in time <em>O(m</em>log<em>D)</em>, where <em>m</em> is |
---|
2768 | ///the number of the arcs of \c n and <em>D</em> is the maximum |
---|
2769 | ///out-degree of the digraph. |
---|
2770 | |
---|
2771 | void refresh() |
---|
2772 | { |
---|
2773 | for(NodeIt n(_g);n!=INVALID;++n) refresh(_head[n]); |
---|
2774 | } |
---|
2775 | |
---|
2776 | ///Find an arc between two nodes. |
---|
2777 | |
---|
2778 | ///Find an arc between two nodes. |
---|
2779 | ///\param s The source node |
---|
2780 | ///\param t The target node |
---|
2781 | ///\param prev The previous arc between \c s and \c t. It it is INVALID or |
---|
2782 | ///not given, the operator finds the first appropriate arc. |
---|
2783 | ///\return An arc from \c s to \c t after \c prev or |
---|
2784 | ///\ref INVALID if there is no more. |
---|
2785 | /// |
---|
2786 | ///For example, you can count the number of arcs from \c u to \c v in the |
---|
2787 | ///following way. |
---|
2788 | ///\code |
---|
2789 | ///AllArcLookUp<ListDigraph> ae(g); |
---|
2790 | ///... |
---|
2791 | ///int n=0; |
---|
2792 | ///for(Arc e=ae(u,v);e!=INVALID;e=ae(u,v,e)) n++; |
---|
2793 | ///\endcode |
---|
2794 | /// |
---|
2795 | ///Finding the first arc take <em>O(</em>log<em>d)</em> time, where |
---|
2796 | /// <em>d</em> is the number of outgoing arcs of \c s. Then, the |
---|
2797 | ///consecutive arcs are found in constant time. |
---|
2798 | /// |
---|
2799 | ///\warning If you change the digraph, refresh() must be called before using |
---|
2800 | ///this operator. If you change the outgoing arcs of |
---|
2801 | ///a single node \c n, then |
---|
2802 | ///\ref refresh(Node) "refresh(n)" is enough. |
---|
2803 | /// |
---|
2804 | #ifdef DOXYGEN |
---|
2805 | Arc operator()(Node s, Node t, Arc prev=INVALID) const {} |
---|
2806 | #else |
---|
2807 | using ArcLookUp<G>::operator() ; |
---|
2808 | Arc operator()(Node s, Node t, Arc prev) const |
---|
2809 | { |
---|
2810 | return prev==INVALID?(*this)(s,t):_next[prev]; |
---|
2811 | } |
---|
2812 | #endif |
---|
2813 | |
---|
2814 | }; |
---|
2815 | |
---|
2816 | /// @} |
---|
2817 | |
---|
2818 | } //END OF NAMESPACE LEMON |
---|
2819 | |
---|
2820 | #endif |
---|