1 | //======================================================================= |
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2 | // Copyright 2001 University of Notre Dame. |
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3 | // Authors: Jeremy G. Siek and Lie-Quan Lee |
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4 | // |
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5 | // Distributed under the Boost Software License, Version 1.0. (See |
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6 | // accompanying file LICENSE_1_0.txt or copy at |
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7 | // http://www.boost.org/LICENSE_1_0.txt) |
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8 | //======================================================================= |
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9 | |
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10 | #ifndef BOOST_SUBGRAPH_HPP |
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11 | #define BOOST_SUBGRAPH_HPP |
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12 | |
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13 | // UNDER CONSTRUCTION |
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14 | |
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15 | #include <boost/config.hpp> |
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16 | #include <list> |
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17 | #include <vector> |
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18 | #include <map> |
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19 | #include <cassert> |
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20 | #include <boost/graph/graph_traits.hpp> |
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21 | #include <boost/graph/properties.hpp> |
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22 | #include <boost/iterator/indirect_iterator.hpp> |
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23 | |
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24 | #include <boost/static_assert.hpp> |
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25 | #include <boost/type_traits/is_same.hpp> |
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26 | |
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27 | namespace boost { |
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28 | |
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29 | struct subgraph_tag { }; |
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30 | |
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31 | // Invariants of an induced subgraph: |
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32 | // - If vertex u is in subgraph g, then u must be in g.parent(). |
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33 | // - If edge e is in subgraph g, then e must be in g.parent(). |
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34 | // - If edge e=(u,v) is in the root graph, then edge e |
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35 | // is also in any subgraph that contains both vertex u and v. |
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36 | |
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37 | // The Graph template parameter must have a vertex_index |
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38 | // and edge_index internal property. It is assumed that |
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39 | // the vertex indices are assigned automatically by the |
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40 | // graph during a call to add_vertex(). It is not |
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41 | // assumed that the edge vertices are assigned automatically, |
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42 | // they are explicitly assigned here. |
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43 | |
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44 | template <typename Graph> |
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45 | class subgraph { |
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46 | typedef graph_traits<Graph> Traits; |
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47 | typedef std::list<subgraph<Graph>*> ChildrenList; |
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48 | public: |
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49 | // Graph requirements |
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50 | typedef typename Traits::vertex_descriptor vertex_descriptor; |
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51 | typedef typename Traits::edge_descriptor edge_descriptor; |
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52 | typedef typename Traits::directed_category directed_category; |
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53 | typedef typename Traits::edge_parallel_category edge_parallel_category; |
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54 | typedef typename Traits::traversal_category traversal_category; |
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55 | |
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56 | static vertex_descriptor null_vertex() |
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57 | { |
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58 | return Traits::null_vertex(); |
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59 | } |
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60 | |
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61 | |
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62 | // IncidenceGraph requirements |
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63 | typedef typename Traits::out_edge_iterator out_edge_iterator; |
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64 | typedef typename Traits::degree_size_type degree_size_type; |
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65 | |
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66 | // AdjacencyGraph requirements |
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67 | typedef typename Traits::adjacency_iterator adjacency_iterator; |
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68 | |
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69 | // VertexListGraph requirements |
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70 | typedef typename Traits::vertex_iterator vertex_iterator; |
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71 | typedef typename Traits::vertices_size_type vertices_size_type; |
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72 | |
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73 | // EdgeListGraph requirements |
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74 | typedef typename Traits::edge_iterator edge_iterator; |
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75 | typedef typename Traits::edges_size_type edges_size_type; |
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76 | |
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77 | typedef typename Traits::in_edge_iterator in_edge_iterator; |
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78 | |
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79 | typedef typename Graph::edge_property_type edge_property_type; |
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80 | typedef typename Graph::vertex_property_type vertex_property_type; |
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81 | typedef subgraph_tag graph_tag; |
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82 | typedef Graph graph_type; |
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83 | typedef typename Graph::graph_property_type graph_property_type; |
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84 | |
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85 | // Constructors |
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86 | |
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87 | // Create the main graph, the root of the subgraph tree |
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88 | subgraph() |
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89 | : m_parent(0), m_edge_counter(0) |
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90 | { } |
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91 | subgraph(const graph_property_type& p) |
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92 | : m_graph(p), m_parent(0), m_edge_counter(0) |
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93 | { } |
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94 | subgraph(vertices_size_type n, |
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95 | const graph_property_type& p = graph_property_type()) |
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96 | : m_graph(n, p), m_parent(0), m_edge_counter(0), m_global_vertex(n) |
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97 | { |
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98 | typename Graph::vertex_iterator v, v_end; |
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99 | vertices_size_type i = 0; |
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100 | for (tie(v, v_end) = vertices(m_graph); v != v_end; ++v) |
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101 | m_global_vertex[i++] = *v; |
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102 | } |
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103 | |
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104 | // copy constructor |
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105 | subgraph(const subgraph& x) |
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106 | : m_graph(x.m_graph), m_parent(x.m_parent), |
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107 | m_edge_counter(x.m_edge_counter), |
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108 | m_global_vertex(x.m_global_vertex), |
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109 | m_global_edge(x.m_global_edge) |
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110 | { |
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111 | // Do a deep copy |
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112 | for (typename ChildrenList::const_iterator i = x.m_children.begin(); |
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113 | i != x.m_children.end(); ++i) |
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114 | m_children.push_back(new subgraph<Graph>( **i )); |
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115 | } |
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116 | |
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117 | |
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118 | ~subgraph() { |
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119 | for (typename ChildrenList::iterator i = m_children.begin(); |
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120 | i != m_children.end(); ++i) |
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121 | delete *i; |
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122 | } |
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123 | |
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124 | |
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125 | // Create a subgraph |
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126 | subgraph<Graph>& create_subgraph() { |
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127 | m_children.push_back(new subgraph<Graph>()); |
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128 | m_children.back()->m_parent = this; |
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129 | return *m_children.back(); |
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130 | } |
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131 | |
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132 | // Create a subgraph with the specified vertex set. |
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133 | template <typename VertexIterator> |
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134 | subgraph<Graph>& create_subgraph(VertexIterator first, |
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135 | VertexIterator last) |
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136 | { |
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137 | m_children.push_back(new subgraph<Graph>()); |
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138 | m_children.back()->m_parent = this; |
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139 | for (; first != last; ++first) |
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140 | add_vertex(*first, *m_children.back()); |
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141 | return *m_children.back(); |
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142 | } |
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143 | |
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144 | // local <-> global descriptor conversion functions |
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145 | vertex_descriptor local_to_global(vertex_descriptor u_local) const |
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146 | { |
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147 | return m_global_vertex[u_local]; |
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148 | } |
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149 | vertex_descriptor global_to_local(vertex_descriptor u_global) const |
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150 | { |
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151 | vertex_descriptor u_local; bool in_subgraph; |
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152 | tie(u_local, in_subgraph) = this->find_vertex(u_global); |
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153 | assert(in_subgraph == true); |
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154 | return u_local; |
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155 | } |
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156 | edge_descriptor local_to_global(edge_descriptor e_local) const |
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157 | { |
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158 | return m_global_edge[get(get(edge_index, m_graph), e_local)]; |
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159 | } |
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160 | edge_descriptor global_to_local(edge_descriptor e_global) const |
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161 | { |
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162 | return |
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163 | (*m_local_edge.find(get(get(edge_index, root().m_graph), e_global))).second; |
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164 | } |
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165 | |
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166 | // Is vertex u (of the root graph) contained in this subgraph? |
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167 | // If so, return the matching local vertex. |
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168 | std::pair<vertex_descriptor, bool> |
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169 | find_vertex(vertex_descriptor u_global) const |
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170 | { |
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171 | typename std::map<vertex_descriptor, vertex_descriptor>::const_iterator |
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172 | i = m_local_vertex.find(u_global); |
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173 | bool valid = i != m_local_vertex.end(); |
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174 | return std::make_pair((valid ? (*i).second : null_vertex()), valid); |
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175 | } |
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176 | |
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177 | // Return the parent graph. |
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178 | subgraph& parent() { return *m_parent; } |
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179 | const subgraph& parent() const { return *m_parent; } |
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180 | |
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181 | bool is_root() const { return m_parent == 0; } |
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182 | |
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183 | // Return the root graph of the subgraph tree. |
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184 | subgraph& root() { |
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185 | if (this->is_root()) |
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186 | return *this; |
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187 | else |
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188 | return m_parent->root(); |
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189 | } |
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190 | const subgraph& root() const { |
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191 | if (this->is_root()) |
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192 | return *this; |
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193 | else |
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194 | return m_parent->root(); |
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195 | } |
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196 | |
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197 | // Return the children subgraphs of this graph/subgraph. |
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198 | // Use a list of pointers because the VC++ std::list doesn't like |
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199 | // storing incomplete type. |
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200 | typedef indirect_iterator< |
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201 | typename ChildrenList::const_iterator |
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202 | , subgraph<Graph> |
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203 | , std::bidirectional_iterator_tag |
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204 | > |
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205 | children_iterator; |
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206 | |
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207 | typedef indirect_iterator< |
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208 | typename ChildrenList::const_iterator |
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209 | , subgraph<Graph> const |
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210 | , std::bidirectional_iterator_tag |
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211 | > |
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212 | const_children_iterator; |
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213 | |
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214 | std::pair<const_children_iterator, const_children_iterator> |
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215 | children() const |
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216 | { |
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217 | return std::make_pair(const_children_iterator(m_children.begin()), |
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218 | const_children_iterator(m_children.end())); |
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219 | } |
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220 | |
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221 | std::pair<children_iterator, children_iterator> |
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222 | children() |
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223 | { |
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224 | return std::make_pair(children_iterator(m_children.begin()), |
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225 | children_iterator(m_children.end())); |
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226 | } |
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227 | |
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228 | std::size_t num_children() const { return m_children.size(); } |
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229 | |
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230 | #ifndef BOOST_GRAPH_NO_BUNDLED_PROPERTIES |
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231 | // Bundled properties support |
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232 | template<typename Descriptor> |
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233 | typename graph::detail::bundled_result<Graph, Descriptor>::type& |
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234 | operator[](Descriptor x) |
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235 | { |
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236 | if (m_parent == 0) return m_graph[x]; |
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237 | else return root().m_graph[local_to_global(x)]; |
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238 | } |
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239 | |
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240 | template<typename Descriptor> |
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241 | typename graph::detail::bundled_result<Graph, Descriptor>::type const& |
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242 | operator[](Descriptor x) const |
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243 | { |
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244 | if (m_parent == 0) return m_graph[x]; |
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245 | else return root().m_graph[local_to_global(x)]; |
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246 | } |
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247 | #endif // BOOST_GRAPH_NO_BUNDLED_PROPERTIES |
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248 | |
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249 | // private: |
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250 | typedef typename property_map<Graph, edge_index_t>::type EdgeIndexMap; |
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251 | typedef typename property_traits<EdgeIndexMap>::value_type edge_index_type; |
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252 | BOOST_STATIC_ASSERT((!is_same<edge_index_type, |
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253 | boost::detail::error_property_not_found>::value)); |
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254 | |
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255 | Graph m_graph; |
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256 | subgraph<Graph>* m_parent; |
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257 | edge_index_type m_edge_counter; // for generating unique edge indices |
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258 | ChildrenList m_children; |
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259 | std::vector<vertex_descriptor> m_global_vertex; // local -> global |
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260 | std::map<vertex_descriptor, vertex_descriptor> m_local_vertex; // global -> local |
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261 | std::vector<edge_descriptor> m_global_edge; // local -> global |
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262 | std::map<edge_index_type, edge_descriptor> m_local_edge; // global -> local |
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263 | |
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264 | edge_descriptor |
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265 | local_add_edge(vertex_descriptor u_local, vertex_descriptor v_local, |
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266 | edge_descriptor e_global) |
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267 | { |
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268 | edge_descriptor e_local; |
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269 | bool inserted; |
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270 | tie(e_local, inserted) = add_edge(u_local, v_local, m_graph); |
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271 | put(edge_index, m_graph, e_local, m_edge_counter++); |
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272 | m_global_edge.push_back(e_global); |
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273 | m_local_edge[get(get(edge_index, this->root()), e_global)] = e_local; |
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274 | return e_local; |
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275 | } |
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276 | |
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277 | }; |
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278 | |
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279 | #ifndef BOOST_GRAPH_NO_BUNDLED_PROPERTIES |
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280 | template<typename Graph> |
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281 | struct vertex_bundle_type<subgraph<Graph> > : vertex_bundle_type<Graph> { }; |
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282 | |
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283 | template<typename Graph> |
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284 | struct edge_bundle_type<subgraph<Graph> > : edge_bundle_type<Graph> { }; |
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285 | #endif // BOOST_GRAPH_NO_BUNDLED_PROPERTIES |
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286 | |
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287 | //=========================================================================== |
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288 | // Functions special to the Subgraph Class |
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289 | |
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290 | template <typename G> |
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291 | typename subgraph<G>::vertex_descriptor |
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292 | add_vertex(typename subgraph<G>::vertex_descriptor u_global, |
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293 | subgraph<G>& g) |
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294 | { |
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295 | assert(!g.is_root()); |
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296 | typename subgraph<G>::vertex_descriptor u_local, v_global, uu_global; |
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297 | typename subgraph<G>::edge_descriptor e_global; |
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298 | |
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299 | u_local = add_vertex(g.m_graph); |
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300 | g.m_global_vertex.push_back(u_global); |
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301 | g.m_local_vertex[u_global] = u_local; |
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302 | |
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303 | subgraph<G>& r = g.root(); |
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304 | |
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305 | // remember edge global and local maps |
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306 | { |
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307 | typename subgraph<G>::out_edge_iterator ei, ei_end; |
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308 | for (tie(ei, ei_end) = out_edges(u_global, r); |
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309 | ei != ei_end; ++ei) { |
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310 | e_global = *ei; |
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311 | v_global = target(e_global, r); |
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312 | if (g.find_vertex(v_global).second == true) |
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313 | g.local_add_edge(u_local, g.global_to_local(v_global), e_global); |
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314 | } |
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315 | } |
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316 | if (is_directed(g)) { // not necessary for undirected graph |
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317 | typename subgraph<G>::vertex_iterator vi, vi_end; |
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318 | typename subgraph<G>::out_edge_iterator ei, ei_end; |
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319 | for (tie(vi, vi_end) = vertices(r); vi != vi_end; ++vi) { |
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320 | v_global = *vi; |
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321 | if (g.find_vertex(v_global).second) |
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322 | for (tie(ei, ei_end) = out_edges(*vi, r); ei != ei_end; ++ei) { |
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323 | e_global = *ei; |
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324 | uu_global = target(e_global, r); |
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325 | if (uu_global == u_global && g.find_vertex(v_global).second) |
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326 | g.local_add_edge(g.global_to_local(v_global), u_local, e_global); |
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327 | } |
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328 | } |
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329 | } |
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330 | |
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331 | return u_local; |
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332 | } |
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333 | |
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334 | //=========================================================================== |
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335 | // Functions required by the IncidenceGraph concept |
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336 | |
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337 | template <typename G> |
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338 | std::pair<typename graph_traits<G>::out_edge_iterator, |
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339 | typename graph_traits<G>::out_edge_iterator> |
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340 | out_edges(typename graph_traits<G>::vertex_descriptor u_local, |
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341 | const subgraph<G>& g) |
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342 | { return out_edges(u_local, g.m_graph); } |
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343 | |
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344 | template <typename G> |
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345 | typename graph_traits<G>::degree_size_type |
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346 | out_degree(typename graph_traits<G>::vertex_descriptor u_local, |
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347 | const subgraph<G>& g) |
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348 | { return out_degree(u_local, g.m_graph); } |
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349 | |
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350 | template <typename G> |
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351 | typename graph_traits<G>::vertex_descriptor |
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352 | source(typename graph_traits<G>::edge_descriptor e_local, |
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353 | const subgraph<G>& g) |
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354 | { return source(e_local, g.m_graph); } |
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355 | |
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356 | template <typename G> |
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357 | typename graph_traits<G>::vertex_descriptor |
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358 | target(typename graph_traits<G>::edge_descriptor e_local, |
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359 | const subgraph<G>& g) |
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360 | { return target(e_local, g.m_graph); } |
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361 | |
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362 | //=========================================================================== |
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363 | // Functions required by the BidirectionalGraph concept |
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364 | |
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365 | template <typename G> |
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366 | std::pair<typename graph_traits<G>::in_edge_iterator, |
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367 | typename graph_traits<G>::in_edge_iterator> |
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368 | in_edges(typename graph_traits<G>::vertex_descriptor u_local, |
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369 | const subgraph<G>& g) |
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370 | { return in_edges(u_local, g.m_graph); } |
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371 | |
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372 | template <typename G> |
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373 | typename graph_traits<G>::degree_size_type |
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374 | in_degree(typename graph_traits<G>::vertex_descriptor u_local, |
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375 | const subgraph<G>& g) |
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376 | { return in_degree(u_local, g.m_graph); } |
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377 | |
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378 | template <typename G> |
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379 | typename graph_traits<G>::degree_size_type |
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380 | degree(typename graph_traits<G>::vertex_descriptor u_local, |
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381 | const subgraph<G>& g) |
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382 | { return degree(u_local, g.m_graph); } |
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383 | |
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384 | //=========================================================================== |
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385 | // Functions required by the AdjacencyGraph concept |
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386 | |
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387 | template <typename G> |
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388 | std::pair<typename subgraph<G>::adjacency_iterator, |
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389 | typename subgraph<G>::adjacency_iterator> |
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390 | adjacent_vertices(typename subgraph<G>::vertex_descriptor u_local, |
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391 | const subgraph<G>& g) |
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392 | { return adjacent_vertices(u_local, g.m_graph); } |
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393 | |
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394 | //=========================================================================== |
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395 | // Functions required by the VertexListGraph concept |
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396 | |
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397 | template <typename G> |
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398 | std::pair<typename subgraph<G>::vertex_iterator, |
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399 | typename subgraph<G>::vertex_iterator> |
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400 | vertices(const subgraph<G>& g) |
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401 | { return vertices(g.m_graph); } |
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402 | |
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403 | template <typename G> |
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404 | typename subgraph<G>::vertices_size_type |
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405 | num_vertices(const subgraph<G>& g) |
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406 | { return num_vertices(g.m_graph); } |
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407 | |
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408 | //=========================================================================== |
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409 | // Functions required by the EdgeListGraph concept |
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410 | |
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411 | template <typename G> |
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412 | std::pair<typename subgraph<G>::edge_iterator, |
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413 | typename subgraph<G>::edge_iterator> |
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414 | edges(const subgraph<G>& g) |
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415 | { return edges(g.m_graph); } |
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416 | |
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417 | template <typename G> |
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418 | typename subgraph<G>::edges_size_type |
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419 | num_edges(const subgraph<G>& g) |
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420 | { return num_edges(g.m_graph); } |
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421 | |
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422 | //=========================================================================== |
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423 | // Functions required by the AdjacencyMatrix concept |
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424 | |
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425 | template <typename G> |
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426 | std::pair<typename subgraph<G>::edge_descriptor, bool> |
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427 | edge(typename subgraph<G>::vertex_descriptor u_local, |
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428 | typename subgraph<G>::vertex_descriptor v_local, |
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429 | const subgraph<G>& g) |
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430 | { |
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431 | return edge(u_local, v_local, g.m_graph); |
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432 | } |
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433 | |
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434 | //=========================================================================== |
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435 | // Functions required by the MutableGraph concept |
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436 | |
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437 | namespace detail { |
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438 | |
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439 | template <typename Vertex, typename Edge, typename Graph> |
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440 | void add_edge_recur_down |
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441 | (Vertex u_global, Vertex v_global, Edge e_global, subgraph<Graph>& g); |
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442 | |
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443 | template <typename Vertex, typename Edge, typename Children, typename G> |
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444 | void children_add_edge(Vertex u_global, Vertex v_global, Edge e_global, |
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445 | Children& c, subgraph<G>* orig) |
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446 | { |
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447 | for (typename Children::iterator i = c.begin(); i != c.end(); ++i) |
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448 | if ((*i)->find_vertex(u_global).second |
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449 | && (*i)->find_vertex(v_global).second) |
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450 | add_edge_recur_down(u_global, v_global, e_global, **i, orig); |
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451 | } |
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452 | |
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453 | template <typename Vertex, typename Edge, typename Graph> |
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454 | void add_edge_recur_down |
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455 | (Vertex u_global, Vertex v_global, Edge e_global, subgraph<Graph>& g, |
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456 | subgraph<Graph>* orig) |
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457 | { |
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458 | if (&g != orig ) { |
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459 | // add local edge only if u_global and v_global are in subgraph g |
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460 | Vertex u_local, v_local; |
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461 | bool u_in_subgraph, v_in_subgraph; |
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462 | tie(u_local, u_in_subgraph) = g.find_vertex(u_global); |
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463 | tie(v_local, v_in_subgraph) = g.find_vertex(v_global); |
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464 | if (u_in_subgraph && v_in_subgraph) |
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465 | g.local_add_edge(u_local, v_local, e_global); |
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466 | } |
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467 | children_add_edge(u_global, v_global, e_global, g.m_children, orig); |
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468 | } |
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469 | |
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470 | template <typename Vertex, typename Graph> |
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471 | std::pair<typename subgraph<Graph>::edge_descriptor, bool> |
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472 | add_edge_recur_up(Vertex u_global, Vertex v_global, |
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473 | const typename Graph::edge_property_type& ep, |
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474 | subgraph<Graph>& g, subgraph<Graph>* orig) |
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475 | { |
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476 | if (g.is_root()) { |
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477 | typename subgraph<Graph>::edge_descriptor e_global; |
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478 | bool inserted; |
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479 | tie(e_global, inserted) = add_edge(u_global, v_global, ep, g.m_graph); |
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480 | put(edge_index, g.m_graph, e_global, g.m_edge_counter++); |
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481 | g.m_global_edge.push_back(e_global); |
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482 | children_add_edge(u_global, v_global, e_global, g.m_children, orig); |
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483 | return std::make_pair(e_global, inserted); |
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484 | } else |
---|
485 | return add_edge_recur_up(u_global, v_global, ep, *g.m_parent, orig); |
---|
486 | } |
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487 | |
---|
488 | } // namespace detail |
---|
489 | |
---|
490 | // Add an edge to the subgraph g, specified by the local vertex |
---|
491 | // descriptors u and v. In addition, the edge will be added to any |
---|
492 | // other subgraphs which contain vertex descriptors u and v. |
---|
493 | |
---|
494 | template <typename G> |
---|
495 | std::pair<typename subgraph<G>::edge_descriptor, bool> |
---|
496 | add_edge(typename subgraph<G>::vertex_descriptor u_local, |
---|
497 | typename subgraph<G>::vertex_descriptor v_local, |
---|
498 | const typename G::edge_property_type& ep, |
---|
499 | subgraph<G>& g) |
---|
500 | { |
---|
501 | if (g.is_root()) // u_local and v_local are really global |
---|
502 | return detail::add_edge_recur_up(u_local, v_local, ep, g, &g); |
---|
503 | else { |
---|
504 | typename subgraph<G>::edge_descriptor e_local, e_global; |
---|
505 | bool inserted; |
---|
506 | tie(e_global, inserted) = detail::add_edge_recur_up |
---|
507 | (g.local_to_global(u_local), g.local_to_global(v_local), ep, g, &g); |
---|
508 | e_local = g.local_add_edge(u_local, v_local, e_global); |
---|
509 | return std::make_pair(e_local, inserted); |
---|
510 | } |
---|
511 | } |
---|
512 | |
---|
513 | template <typename G> |
---|
514 | std::pair<typename subgraph<G>::edge_descriptor, bool> |
---|
515 | add_edge(typename subgraph<G>::vertex_descriptor u, |
---|
516 | typename subgraph<G>::vertex_descriptor v, |
---|
517 | subgraph<G>& g) |
---|
518 | { |
---|
519 | typename G::edge_property_type ep; |
---|
520 | return add_edge(u, v, ep, g); |
---|
521 | } |
---|
522 | |
---|
523 | namespace detail { |
---|
524 | |
---|
525 | //------------------------------------------------------------------------- |
---|
526 | // implementation of remove_edge(u,v,g) |
---|
527 | |
---|
528 | template <typename Vertex, typename Graph> |
---|
529 | void remove_edge_recur_down(Vertex u_global, Vertex v_global, |
---|
530 | subgraph<Graph>& g); |
---|
531 | |
---|
532 | template <typename Vertex, typename Children> |
---|
533 | void children_remove_edge(Vertex u_global, Vertex v_global, |
---|
534 | Children& c) |
---|
535 | { |
---|
536 | for (typename Children::iterator i = c.begin(); i != c.end(); ++i) |
---|
537 | if ((*i)->find_vertex(u_global).second |
---|
538 | && (*i)->find_vertex(v_global).second) |
---|
539 | remove_edge_recur_down(u_global, v_global, **i); |
---|
540 | } |
---|
541 | |
---|
542 | template <typename Vertex, typename Graph> |
---|
543 | void remove_edge_recur_down(Vertex u_global, Vertex v_global, |
---|
544 | subgraph<Graph>& g) |
---|
545 | { |
---|
546 | Vertex u_local, v_local; |
---|
547 | u_local = g.m_local_vertex[u_global]; |
---|
548 | v_local = g.m_local_vertex[v_global]; |
---|
549 | remove_edge(u_local, v_local, g.m_graph); |
---|
550 | children_remove_edge(u_global, v_global, g.m_children); |
---|
551 | } |
---|
552 | |
---|
553 | template <typename Vertex, typename Graph> |
---|
554 | void remove_edge_recur_up(Vertex u_global, Vertex v_global, |
---|
555 | subgraph<Graph>& g) |
---|
556 | { |
---|
557 | if (g.is_root()) { |
---|
558 | remove_edge(u_global, v_global, g.m_graph); |
---|
559 | children_remove_edge(u_global, v_global, g.m_children); |
---|
560 | } else |
---|
561 | remove_edge_recur_up(u_global, v_global, *g.m_parent); |
---|
562 | } |
---|
563 | |
---|
564 | //------------------------------------------------------------------------- |
---|
565 | // implementation of remove_edge(e,g) |
---|
566 | |
---|
567 | template <typename Edge, typename Graph> |
---|
568 | void remove_edge_recur_down(Edge e_global, subgraph<Graph>& g); |
---|
569 | |
---|
570 | template <typename Edge, typename Children> |
---|
571 | void children_remove_edge(Edge e_global, Children& c) |
---|
572 | { |
---|
573 | for (typename Children::iterator i = c.begin(); i != c.end(); ++i) |
---|
574 | if ((*i)->find_vertex(source(e_global, **i)).second |
---|
575 | && (*i)->find_vertex(target(e_global, **i)).second) |
---|
576 | remove_edge_recur_down(source(e_global, **i), |
---|
577 | target(e_global, **i), **i); |
---|
578 | } |
---|
579 | |
---|
580 | template <typename Edge, typename Graph> |
---|
581 | void remove_edge_recur_down(Edge e_global, subgraph<Graph>& g) |
---|
582 | { |
---|
583 | remove_edge(g.global_to_local(e_global), g.m_graph); |
---|
584 | children_remove_edge(e_global, g.m_children); |
---|
585 | } |
---|
586 | |
---|
587 | template <typename Edge, typename Graph> |
---|
588 | void remove_edge_recur_up(Edge e_global, subgraph<Graph>& g) |
---|
589 | { |
---|
590 | if (g.is_root()) { |
---|
591 | remove_edge(e_global, g.m_graph); |
---|
592 | children_remove_edge(e_global, g.m_children); |
---|
593 | } else |
---|
594 | remove_edge_recur_up(e_global, *g.m_parent); |
---|
595 | } |
---|
596 | |
---|
597 | } // namespace detail |
---|
598 | |
---|
599 | template <typename G> |
---|
600 | void |
---|
601 | remove_edge(typename subgraph<G>::vertex_descriptor u_local, |
---|
602 | typename subgraph<G>::vertex_descriptor v_local, |
---|
603 | subgraph<G>& g) |
---|
604 | { |
---|
605 | if (g.is_root()) |
---|
606 | detail::remove_edge_recur_up(u_local, v_local, g); |
---|
607 | else |
---|
608 | detail::remove_edge_recur_up(g.local_to_global(u_local), |
---|
609 | g.local_to_global(v_local), g); |
---|
610 | } |
---|
611 | |
---|
612 | template <typename G> |
---|
613 | void |
---|
614 | remove_edge(typename subgraph<G>::edge_descriptor e_local, |
---|
615 | subgraph<G>& g) |
---|
616 | { |
---|
617 | if (g.is_root()) |
---|
618 | detail::remove_edge_recur_up(e_local, g); |
---|
619 | else |
---|
620 | detail::remove_edge_recur_up(g.local_to_global(e_local), g); |
---|
621 | } |
---|
622 | |
---|
623 | template <typename Predicate, typename G> |
---|
624 | void |
---|
625 | remove_edge_if(Predicate p, subgraph<G>& g) |
---|
626 | { |
---|
627 | // This is wrong... |
---|
628 | remove_edge_if(p, g.m_graph); |
---|
629 | } |
---|
630 | |
---|
631 | template <typename G> |
---|
632 | void |
---|
633 | clear_vertex(typename subgraph<G>::vertex_descriptor v_local, |
---|
634 | subgraph<G>& g) |
---|
635 | { |
---|
636 | // this is wrong... |
---|
637 | clear_vertex(v_local, g.m_graph); |
---|
638 | } |
---|
639 | |
---|
640 | namespace detail { |
---|
641 | |
---|
642 | template <typename G> |
---|
643 | typename subgraph<G>::vertex_descriptor |
---|
644 | add_vertex_recur_up(subgraph<G>& g) |
---|
645 | { |
---|
646 | typename subgraph<G>::vertex_descriptor u_local, u_global; |
---|
647 | if (g.is_root()) { |
---|
648 | u_global = add_vertex(g.m_graph); |
---|
649 | g.m_global_vertex.push_back(u_global); |
---|
650 | } else { |
---|
651 | u_global = add_vertex_recur_up(*g.m_parent); |
---|
652 | u_local = add_vertex(g.m_graph); |
---|
653 | g.m_global_vertex.push_back(u_global); |
---|
654 | g.m_local_vertex[u_global] = u_local; |
---|
655 | } |
---|
656 | return u_global; |
---|
657 | } |
---|
658 | |
---|
659 | } // namespace detail |
---|
660 | |
---|
661 | template <typename G> |
---|
662 | typename subgraph<G>::vertex_descriptor |
---|
663 | add_vertex(subgraph<G>& g) |
---|
664 | { |
---|
665 | typename subgraph<G>::vertex_descriptor u_local, u_global; |
---|
666 | if (g.is_root()) { |
---|
667 | u_global = add_vertex(g.m_graph); |
---|
668 | g.m_global_vertex.push_back(u_global); |
---|
669 | u_local = u_global; |
---|
670 | } else { |
---|
671 | u_global = detail::add_vertex_recur_up(g.parent()); |
---|
672 | u_local = add_vertex(g.m_graph); |
---|
673 | g.m_global_vertex.push_back(u_global); |
---|
674 | g.m_local_vertex[u_global] = u_local; |
---|
675 | } |
---|
676 | return u_local; |
---|
677 | } |
---|
678 | |
---|
679 | template <typename G> |
---|
680 | void remove_vertex(typename subgraph<G>::vertex_descriptor u, |
---|
681 | subgraph<G>& g) |
---|
682 | { |
---|
683 | // UNDER CONSTRUCTION |
---|
684 | assert(false); |
---|
685 | } |
---|
686 | |
---|
687 | |
---|
688 | //=========================================================================== |
---|
689 | // Functions required by the PropertyGraph concept |
---|
690 | |
---|
691 | template <typename GraphPtr, typename PropertyMap, typename Tag> |
---|
692 | class subgraph_global_property_map |
---|
693 | : public put_get_helper< |
---|
694 | typename property_traits<PropertyMap>::reference, |
---|
695 | subgraph_global_property_map<GraphPtr, PropertyMap, Tag> > |
---|
696 | { |
---|
697 | typedef property_traits<PropertyMap> Traits; |
---|
698 | public: |
---|
699 | typedef typename Traits::category category; |
---|
700 | typedef typename Traits::value_type value_type; |
---|
701 | typedef typename Traits::key_type key_type; |
---|
702 | typedef typename Traits::reference reference; |
---|
703 | |
---|
704 | subgraph_global_property_map() { } |
---|
705 | |
---|
706 | subgraph_global_property_map(GraphPtr g) |
---|
707 | : m_g(g) { } |
---|
708 | |
---|
709 | inline reference operator[](key_type e_local) const { |
---|
710 | PropertyMap pmap = get(Tag(), m_g->root().m_graph); |
---|
711 | if (m_g->m_parent == 0) |
---|
712 | return pmap[e_local]; |
---|
713 | else |
---|
714 | return pmap[m_g->local_to_global(e_local)]; |
---|
715 | } |
---|
716 | GraphPtr m_g; |
---|
717 | }; |
---|
718 | |
---|
719 | template <typename GraphPtr, typename PropertyMap, typename Tag> |
---|
720 | class subgraph_local_property_map |
---|
721 | : public put_get_helper< |
---|
722 | typename property_traits<PropertyMap>::reference, |
---|
723 | subgraph_local_property_map<GraphPtr, PropertyMap, Tag> > |
---|
724 | { |
---|
725 | typedef property_traits<PropertyMap> Traits; |
---|
726 | public: |
---|
727 | typedef typename Traits::category category; |
---|
728 | typedef typename Traits::value_type value_type; |
---|
729 | typedef typename Traits::key_type key_type; |
---|
730 | typedef typename Traits::reference reference; |
---|
731 | |
---|
732 | subgraph_local_property_map() { } |
---|
733 | |
---|
734 | subgraph_local_property_map(GraphPtr g) |
---|
735 | : m_g(g) { } |
---|
736 | |
---|
737 | inline reference operator[](key_type e_local) const { |
---|
738 | PropertyMap pmap = get(Tag(), *m_g); |
---|
739 | return pmap[e_local]; |
---|
740 | } |
---|
741 | GraphPtr m_g; |
---|
742 | }; |
---|
743 | |
---|
744 | namespace detail { |
---|
745 | |
---|
746 | struct subgraph_any_pmap { |
---|
747 | template <class Tag, class SubGraph, class Property> |
---|
748 | class bind_ { |
---|
749 | typedef typename SubGraph::graph_type Graph; |
---|
750 | typedef SubGraph* SubGraphPtr; |
---|
751 | typedef const SubGraph* const_SubGraphPtr; |
---|
752 | typedef typename property_map<Graph, Tag>::type PMap; |
---|
753 | typedef typename property_map<Graph, Tag>::const_type const_PMap; |
---|
754 | public: |
---|
755 | typedef subgraph_global_property_map<SubGraphPtr, PMap, Tag> type; |
---|
756 | typedef subgraph_global_property_map<const_SubGraphPtr, const_PMap, Tag> |
---|
757 | const_type; |
---|
758 | }; |
---|
759 | }; |
---|
760 | struct subgraph_id_pmap { |
---|
761 | template <class Tag, class SubGraph, class Property> |
---|
762 | struct bind_ { |
---|
763 | typedef typename SubGraph::graph_type Graph; |
---|
764 | typedef SubGraph* SubGraphPtr; |
---|
765 | typedef const SubGraph* const_SubGraphPtr; |
---|
766 | typedef typename property_map<Graph, Tag>::type PMap; |
---|
767 | typedef typename property_map<Graph, Tag>::const_type const_PMap; |
---|
768 | public: |
---|
769 | typedef subgraph_local_property_map<SubGraphPtr, PMap, Tag> type; |
---|
770 | typedef subgraph_local_property_map<const_SubGraphPtr, const_PMap, Tag> |
---|
771 | const_type; |
---|
772 | }; |
---|
773 | }; |
---|
774 | template <class Tag> |
---|
775 | struct subgraph_choose_pmap_helper { |
---|
776 | typedef subgraph_any_pmap type; |
---|
777 | }; |
---|
778 | template <> |
---|
779 | struct subgraph_choose_pmap_helper<vertex_index_t> { |
---|
780 | typedef subgraph_id_pmap type; |
---|
781 | }; |
---|
782 | template <class Tag, class Graph, class Property> |
---|
783 | struct subgraph_choose_pmap { |
---|
784 | typedef typename subgraph_choose_pmap_helper<Tag>::type Helper; |
---|
785 | typedef typename Helper::template bind_<Tag, Graph, Property> Bind; |
---|
786 | typedef typename Bind::type type; |
---|
787 | typedef typename Bind::const_type const_type; |
---|
788 | }; |
---|
789 | struct subgraph_property_generator { |
---|
790 | template <class SubGraph, class Property, class Tag> |
---|
791 | struct bind_ { |
---|
792 | typedef subgraph_choose_pmap<Tag, SubGraph, Property> Choice; |
---|
793 | typedef typename Choice::type type; |
---|
794 | typedef typename Choice::const_type const_type; |
---|
795 | }; |
---|
796 | }; |
---|
797 | |
---|
798 | } // namespace detail |
---|
799 | |
---|
800 | template <> |
---|
801 | struct vertex_property_selector<subgraph_tag> { |
---|
802 | typedef detail::subgraph_property_generator type; |
---|
803 | }; |
---|
804 | |
---|
805 | template <> |
---|
806 | struct edge_property_selector<subgraph_tag> { |
---|
807 | typedef detail::subgraph_property_generator type; |
---|
808 | }; |
---|
809 | |
---|
810 | template <typename G, typename Property> |
---|
811 | typename property_map< subgraph<G>, Property>::type |
---|
812 | get(Property, subgraph<G>& g) |
---|
813 | { |
---|
814 | typedef typename property_map< subgraph<G>, Property>::type PMap; |
---|
815 | return PMap(&g); |
---|
816 | } |
---|
817 | |
---|
818 | template <typename G, typename Property> |
---|
819 | typename property_map< subgraph<G>, Property>::const_type |
---|
820 | get(Property, const subgraph<G>& g) |
---|
821 | { |
---|
822 | typedef typename property_map< subgraph<G>, Property>::const_type PMap; |
---|
823 | return PMap(&g); |
---|
824 | } |
---|
825 | |
---|
826 | template <typename G, typename Property, typename Key> |
---|
827 | typename property_traits< |
---|
828 | typename property_map< subgraph<G>, Property>::const_type |
---|
829 | >::value_type |
---|
830 | get(Property, const subgraph<G>& g, const Key& k) |
---|
831 | { |
---|
832 | typedef typename property_map< subgraph<G>, Property>::const_type PMap; |
---|
833 | PMap pmap(&g); |
---|
834 | return pmap[k]; |
---|
835 | } |
---|
836 | |
---|
837 | template <typename G, typename Property, typename Key, typename Value> |
---|
838 | void |
---|
839 | put(Property, subgraph<G>& g, const Key& k, const Value& val) |
---|
840 | { |
---|
841 | typedef typename property_map< subgraph<G>, Property>::type PMap; |
---|
842 | PMap pmap(&g); |
---|
843 | pmap[k] = val; |
---|
844 | } |
---|
845 | |
---|
846 | template <typename G, typename Tag> |
---|
847 | inline |
---|
848 | typename graph_property<G, Tag>::type& |
---|
849 | get_property(subgraph<G>& g, Tag tag) { |
---|
850 | return get_property(g.m_graph, tag); |
---|
851 | } |
---|
852 | |
---|
853 | template <typename G, typename Tag> |
---|
854 | inline |
---|
855 | const typename graph_property<G, Tag>::type& |
---|
856 | get_property(const subgraph<G>& g, Tag tag) { |
---|
857 | return get_property(g.m_graph, tag); |
---|
858 | } |
---|
859 | |
---|
860 | //=========================================================================== |
---|
861 | // Miscellaneous Functions |
---|
862 | |
---|
863 | template <typename G> |
---|
864 | typename subgraph<G>::vertex_descriptor |
---|
865 | vertex(typename subgraph<G>::vertices_size_type n, const subgraph<G>& g) |
---|
866 | { |
---|
867 | return vertex(n, g.m_graph); |
---|
868 | } |
---|
869 | |
---|
870 | } // namespace boost |
---|
871 | |
---|
872 | #endif // BOOST_SUBGRAPH_HPP |
---|