boost/graph/copy.hpp
// //======================================================================= // Copyright 1997-2001 University of Notre Dame. // Authors: Jeremy G. Siek, Lie-Quan Lee, Andrew Lumsdaine // // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) //======================================================================= // /* This file implements the following functions: template <typename VertexListGraph, typename MutableGraph> void copy_graph(const VertexListGraph& g_in, MutableGraph& g_out) template <typename VertexListGraph, typename MutableGraph, class P, class T, class R> void copy_graph(const VertexListGraph& g_in, MutableGraph& g_out, const bgl_named_params<P, T, R>& params) template <typename IncidenceGraph, typename MutableGraph> typename graph_traits<MutableGraph>::vertex_descriptor copy_component(IncidenceGraph& g_in, typename graph_traits<IncidenceGraph>::vertex_descriptor src, MutableGraph& g_out) template <typename IncidenceGraph, typename MutableGraph, typename P, typename T, typename R> typename graph_traits<MutableGraph>::vertex_descriptor copy_component(IncidenceGraph& g_in, typename graph_traits<IncidenceGraph>::vertex_descriptor src, MutableGraph& g_out, const bgl_named_params<P, T, R>& params) */ #ifndef BOOST_GRAPH_COPY_HPP #define BOOST_GRAPH_COPY_HPP #include <boost/config.hpp> #include <vector> #include <boost/graph/graph_traits.hpp> #include <boost/graph/reverse_graph.hpp> #include <boost/property_map/property_map.hpp> #include <boost/graph/named_function_params.hpp> #include <boost/graph/breadth_first_search.hpp> #include <boost/type_traits/conversion_traits.hpp> namespace boost { namespace detail { // Hack to make transpose_graph work with the same interface as before template <typename Graph, typename Desc> struct remove_reverse_edge_descriptor { typedef Desc type; static Desc convert(const Desc& d, const Graph&) {return d;} }; template <typename Graph, typename Desc> struct remove_reverse_edge_descriptor<Graph, reverse_graph_edge_descriptor<Desc> > { typedef Desc type; static Desc convert(const reverse_graph_edge_descriptor<Desc>& d, const Graph& g) { return get(edge_underlying, g, d); } }; // Add a reverse_graph_edge_descriptor wrapper if the Graph is a // reverse_graph but the edge descriptor is from the original graph (this // case comes from the fact that transpose_graph uses reverse_graph // internally but doesn't expose the different edge descriptor type to the // user). template <typename Desc, typename Graph> struct add_reverse_edge_descriptor { typedef Desc type; static Desc convert(const Desc& d) {return d;} }; template <typename Desc, typename G, typename GR> struct add_reverse_edge_descriptor<Desc, boost::reverse_graph<G, GR> > { typedef reverse_graph_edge_descriptor<Desc> type; static reverse_graph_edge_descriptor<Desc> convert(const Desc& d) { return reverse_graph_edge_descriptor<Desc>(d); } }; template <typename Desc, typename G, typename GR> struct add_reverse_edge_descriptor<reverse_graph_edge_descriptor<Desc>, boost::reverse_graph<G, GR> > { typedef reverse_graph_edge_descriptor<Desc> type; static reverse_graph_edge_descriptor<Desc> convert(const reverse_graph_edge_descriptor<Desc>& d) { return d; } }; // Default edge and vertex property copiers template <typename Graph1, typename Graph2> struct edge_copier { edge_copier(const Graph1& g1, Graph2& g2) : edge_all_map1(get(edge_all, g1)), edge_all_map2(get(edge_all, g2)) { } template <typename Edge1, typename Edge2> void operator()(const Edge1& e1, Edge2& e2) const { put(edge_all_map2, e2, get(edge_all_map1, add_reverse_edge_descriptor<Edge1, Graph1>::convert(e1))); } typename property_map<Graph1, edge_all_t>::const_type edge_all_map1; mutable typename property_map<Graph2, edge_all_t>::type edge_all_map2; }; template <typename Graph1, typename Graph2> inline edge_copier<Graph1,Graph2> make_edge_copier(const Graph1& g1, Graph2& g2) { return edge_copier<Graph1,Graph2>(g1, g2); } template <typename Graph1, typename Graph2> struct vertex_copier { vertex_copier(const Graph1& g1, Graph2& g2) : vertex_all_map1(get(vertex_all, g1)), vertex_all_map2(get(vertex_all, g2)) { } template <typename Vertex1, typename Vertex2> void operator()(const Vertex1& v1, Vertex2& v2) const { put(vertex_all_map2, v2, get(vertex_all_map1, v1)); } typename property_map<Graph1, vertex_all_t>::const_type vertex_all_map1; mutable typename property_map<Graph2, vertex_all_t>::type vertex_all_map2; }; template <typename Graph1, typename Graph2> inline vertex_copier<Graph1,Graph2> make_vertex_copier(const Graph1& g1, Graph2& g2) { return vertex_copier<Graph1,Graph2>(g1, g2); } // Copy all the vertices and edges of graph g_in into graph g_out. // The copy_vertex and copy_edge function objects control how vertex // and edge properties are copied. template <int Version> struct copy_graph_impl { }; template <> struct copy_graph_impl<0> { template <typename Graph, typename MutableGraph, typename CopyVertex, typename CopyEdge, typename IndexMap, typename Orig2CopyVertexIndexMap> static void apply(const Graph& g_in, MutableGraph& g_out, CopyVertex copy_vertex, CopyEdge copy_edge, Orig2CopyVertexIndexMap orig2copy, IndexMap) { typedef remove_reverse_edge_descriptor<Graph, typename graph_traits<Graph>::edge_descriptor> cvt; typename graph_traits<Graph>::vertex_iterator vi, vi_end; for (boost::tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { typename graph_traits<MutableGraph>::vertex_descriptor new_v = add_vertex(g_out); put(orig2copy, *vi, new_v); copy_vertex(*vi, new_v); } typename graph_traits<Graph>::edge_iterator ei, ei_end; for (boost::tie(ei, ei_end) = edges(g_in); ei != ei_end; ++ei) { typename graph_traits<MutableGraph>::edge_descriptor new_e; bool inserted; boost::tie(new_e, inserted) = add_edge(get(orig2copy, source(*ei, g_in)), get(orig2copy, target(*ei, g_in)), g_out); copy_edge(cvt::convert(*ei, g_in), new_e); } } }; // for directed graphs template <> struct copy_graph_impl<1> { template <typename Graph, typename MutableGraph, typename CopyVertex, typename CopyEdge, typename IndexMap, typename Orig2CopyVertexIndexMap> static void apply(const Graph& g_in, MutableGraph& g_out, CopyVertex copy_vertex, CopyEdge copy_edge, Orig2CopyVertexIndexMap orig2copy, IndexMap) { typedef remove_reverse_edge_descriptor<Graph, typename graph_traits<Graph>::edge_descriptor> cvt; typename graph_traits<Graph>::vertex_iterator vi, vi_end; for (boost::tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { typename graph_traits<MutableGraph>::vertex_descriptor new_v = add_vertex(g_out); put(orig2copy, *vi, new_v); copy_vertex(*vi, new_v); } for (boost::tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { typename graph_traits<Graph>::out_edge_iterator ei, ei_end; for (boost::tie(ei, ei_end) = out_edges(*vi, g_in); ei != ei_end; ++ei) { typename graph_traits<MutableGraph>::edge_descriptor new_e; bool inserted; boost::tie(new_e, inserted) = add_edge(get(orig2copy, source(*ei, g_in)), get(orig2copy, target(*ei, g_in)), g_out); copy_edge(cvt::convert(*ei, g_in), new_e); } } } }; // for undirected graphs template <> struct copy_graph_impl<2> { template <typename Graph, typename MutableGraph, typename CopyVertex, typename CopyEdge, typename IndexMap, typename Orig2CopyVertexIndexMap> static void apply(const Graph& g_in, MutableGraph& g_out, CopyVertex copy_vertex, CopyEdge copy_edge, Orig2CopyVertexIndexMap orig2copy, IndexMap index_map) { typedef remove_reverse_edge_descriptor<Graph, typename graph_traits<Graph>::edge_descriptor> cvt; typedef color_traits<default_color_type> Color; std::vector<default_color_type> color(num_vertices(g_in), Color::white()); typename graph_traits<Graph>::vertex_iterator vi, vi_end; for (boost::tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { typename graph_traits<MutableGraph>::vertex_descriptor new_v = add_vertex(g_out); put(orig2copy, *vi, new_v); copy_vertex(*vi, new_v); } for (boost::tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { typename graph_traits<Graph>::out_edge_iterator ei, ei_end; for (boost::tie(ei, ei_end) = out_edges(*vi, g_in); ei != ei_end; ++ei) { typename graph_traits<MutableGraph>::edge_descriptor new_e; bool inserted; if (color[get(index_map, target(*ei, g_in))] == Color::white()) { boost::tie(new_e, inserted) = add_edge(get(orig2copy, source(*ei,g_in)), get(orig2copy, target(*ei,g_in)), g_out); copy_edge(cvt::convert(*ei, g_in), new_e); } } color[get(index_map, *vi)] = Color::black(); } } }; template <class Graph> struct choose_graph_copy { typedef typename graph_traits<Graph>::traversal_category Trv; typedef typename graph_traits<Graph>::directed_category Dr; enum { algo = (is_convertible<Trv, vertex_list_graph_tag>::value && is_convertible<Trv, edge_list_graph_tag>::value) ? 0 : is_convertible<Dr, directed_tag>::value ? 1 : 2 }; typedef copy_graph_impl<algo> type; }; //------------------------------------------------------------------------- struct choose_copier_parameter { template <class P, class G1, class G2> struct bind_ { typedef const P& result_type; static result_type apply(const P& p, const G1&, G2&) { return p; } }; }; struct choose_default_edge_copier { template <class P, class G1, class G2> struct bind_ { typedef edge_copier<G1, G2> result_type; static result_type apply(const P&, const G1& g1, G2& g2) { return result_type(g1, g2); } }; }; template <class Param> struct choose_edge_copy { typedef choose_copier_parameter type; }; template <> struct choose_edge_copy<param_not_found> { typedef choose_default_edge_copier type; }; template <class Param, class G1, class G2> struct choose_edge_copier_helper { typedef typename choose_edge_copy<Param>::type Selector; typedef typename Selector:: template bind_<Param, G1, G2> Bind; typedef Bind type; typedef typename Bind::result_type result_type; }; template <typename Param, typename G1, typename G2> typename detail::choose_edge_copier_helper<Param,G1,G2>::result_type choose_edge_copier(const Param& params, const G1& g_in, G2& g_out) { typedef typename detail::choose_edge_copier_helper<Param,G1,G2>::type Choice; return Choice::apply(params, g_in, g_out); } struct choose_default_vertex_copier { template <class P, class G1, class G2> struct bind_ { typedef vertex_copier<G1, G2> result_type; static result_type apply(const P&, const G1& g1, G2& g2) { return result_type(g1, g2); } }; }; template <class Param> struct choose_vertex_copy { typedef choose_copier_parameter type; }; template <> struct choose_vertex_copy<param_not_found> { typedef choose_default_vertex_copier type; }; template <class Param, class G1, class G2> struct choose_vertex_copier_helper { typedef typename choose_vertex_copy<Param>::type Selector; typedef typename Selector:: template bind_<Param, G1, G2> Bind; typedef Bind type; typedef typename Bind::result_type result_type; }; template <typename Param, typename G1, typename G2> typename detail::choose_vertex_copier_helper<Param,G1,G2>::result_type choose_vertex_copier(const Param& params, const G1& g_in, G2& g_out) { typedef typename detail::choose_vertex_copier_helper<Param,G1,G2>::type Choice; return Choice::apply(params, g_in, g_out); } } // namespace detail template <typename VertexListGraph, typename MutableGraph> void copy_graph(const VertexListGraph& g_in, MutableGraph& g_out) { if (num_vertices(g_in) == 0) return; typedef typename graph_traits<MutableGraph>::vertex_descriptor vertex_t; std::vector<vertex_t> orig2copy(num_vertices(g_in)); typedef typename detail::choose_graph_copy<VertexListGraph>::type copy_impl; copy_impl::apply (g_in, g_out, detail::make_vertex_copier(g_in, g_out), detail::make_edge_copier(g_in, g_out), make_iterator_property_map(orig2copy.begin(), get(vertex_index, g_in), orig2copy[0]), get(vertex_index, g_in) ); } template <typename VertexListGraph, typename MutableGraph, class P, class T, class R> void copy_graph(const VertexListGraph& g_in, MutableGraph& g_out, const bgl_named_params<P, T, R>& params) { typename std::vector<T>::size_type n; n = is_default_param(get_param(params, orig_to_copy_t())) ? num_vertices(g_in) : 1; if (n == 0) return; std::vector<BOOST_DEDUCED_TYPENAME graph_traits<MutableGraph>::vertex_descriptor> orig2copy(n); typedef typename detail::choose_graph_copy<VertexListGraph>::type copy_impl; copy_impl::apply (g_in, g_out, detail::choose_vertex_copier(get_param(params, vertex_copy_t()), g_in, g_out), detail::choose_edge_copier(get_param(params, edge_copy_t()), g_in, g_out), choose_param(get_param(params, orig_to_copy_t()), make_iterator_property_map (orig2copy.begin(), choose_const_pmap(get_param(params, vertex_index), g_in, vertex_index), orig2copy[0])), choose_const_pmap(get_param(params, vertex_index), g_in, vertex_index) ); } namespace detail { template <class NewGraph, class Copy2OrigIndexMap, class CopyVertex, class CopyEdge> struct graph_copy_visitor : public bfs_visitor<> { graph_copy_visitor(NewGraph& graph, Copy2OrigIndexMap c, CopyVertex cv, CopyEdge ce) : g_out(graph), orig2copy(c), copy_vertex(cv), copy_edge(ce) { } template <class Vertex, class Graph> typename graph_traits<NewGraph>::vertex_descriptor copy_one_vertex(Vertex u) const { typename graph_traits<NewGraph>::vertex_descriptor new_u = add_vertex(g_out); put(orig2copy, u, new_u); copy_vertex(u, new_u); return new_u; } template <class Edge, class Graph> void tree_edge(Edge e, const Graph& g_in) const { // For a tree edge, the target vertex has not been copied yet. typename graph_traits<NewGraph>::edge_descriptor new_e; bool inserted; boost::tie(new_e, inserted) = add_edge(get(orig2copy, source(e, g_in)), this->copy_one_vertex(target(e, g_in)), g_out); copy_edge(e, new_e); } template <class Edge, class Graph> void non_tree_edge(Edge e, const Graph& g_in) const { // For a non-tree edge, the target vertex has already been copied. typename graph_traits<NewGraph>::edge_descriptor new_e; bool inserted; boost::tie(new_e, inserted) = add_edge(get(orig2copy, source(e, g_in)), get(orig2copy, target(e, g_in)), g_out); copy_edge(e, new_e); } private: NewGraph& g_out; Copy2OrigIndexMap orig2copy; CopyVertex copy_vertex; CopyEdge copy_edge; }; template <typename Graph, typename MutableGraph, typename CopyVertex, typename CopyEdge, typename Orig2CopyVertexIndexMap, typename Params> typename graph_traits<MutableGraph>::vertex_descriptor copy_component_impl (const Graph& g_in, typename graph_traits<Graph>::vertex_descriptor src, MutableGraph& g_out, CopyVertex copy_vertex, CopyEdge copy_edge, Orig2CopyVertexIndexMap orig2copy, const Params& params) { graph_copy_visitor<MutableGraph, Orig2CopyVertexIndexMap, CopyVertex, CopyEdge> vis(g_out, orig2copy, copy_vertex, copy_edge); typename graph_traits<MutableGraph>::vertex_descriptor src_copy = vis.copy_one_vertex(src); breadth_first_search(g_in, src, params.visitor(vis)); return src_copy; } } // namespace detail // Copy all the vertices and edges of graph g_in that are reachable // from the source vertex into graph g_out. Return the vertex // in g_out that matches the source vertex of g_in. template <typename IncidenceGraph, typename MutableGraph, typename P, typename T, typename R> typename graph_traits<MutableGraph>::vertex_descriptor copy_component(IncidenceGraph& g_in, typename graph_traits<IncidenceGraph>::vertex_descriptor src, MutableGraph& g_out, const bgl_named_params<P, T, R>& params) { typename std::vector<T>::size_type n; n = is_default_param(get_param(params, orig_to_copy_t())) ? num_vertices(g_in) : 1; std::vector<typename graph_traits<IncidenceGraph>::vertex_descriptor> orig2copy(n); return detail::copy_component_impl (g_in, src, g_out, detail::choose_vertex_copier(get_param(params, vertex_copy_t()), g_in, g_out), detail::choose_edge_copier(get_param(params, edge_copy_t()), g_in, g_out), choose_param(get_param(params, orig_to_copy_t()), make_iterator_property_map (orig2copy.begin(), choose_pmap(get_param(params, vertex_index), g_in, vertex_index), orig2copy[0])), params ); } template <typename IncidenceGraph, typename MutableGraph> typename graph_traits<MutableGraph>::vertex_descriptor copy_component(IncidenceGraph& g_in, typename graph_traits<IncidenceGraph>::vertex_descriptor src, MutableGraph& g_out) { std::vector<typename graph_traits<IncidenceGraph>::vertex_descriptor> orig2copy(num_vertices(g_in)); return detail::copy_component_impl (g_in, src, g_out, make_vertex_copier(g_in, g_out), make_edge_copier(g_in, g_out), make_iterator_property_map(orig2copy.begin(), get(vertex_index, g_in), orig2copy[0]), bgl_named_params<char,char>('x') // dummy param object ); } } // namespace boost #endif // BOOST_GRAPH_COPY_HPP