1 | // |
---|
2 | //======================================================================= |
---|
3 | // Copyright 1997-2001 University of Notre Dame. |
---|
4 | // Authors: Jeremy G. Siek, Lie-Quan Lee, Andrew Lumsdaine |
---|
5 | // |
---|
6 | // Distributed under the Boost Software License, Version 1.0. (See |
---|
7 | // accompanying file LICENSE_1_0.txt or copy at |
---|
8 | // http://www.boost.org/LICENSE_1_0.txt) |
---|
9 | //======================================================================= |
---|
10 | // |
---|
11 | |
---|
12 | /* |
---|
13 | This file implements the following functions: |
---|
14 | |
---|
15 | |
---|
16 | template <typename VertexListGraph, typename MutableGraph> |
---|
17 | void copy_graph(const VertexListGraph& g_in, MutableGraph& g_out) |
---|
18 | |
---|
19 | template <typename VertexListGraph, typename MutableGraph, |
---|
20 | class P, class T, class R> |
---|
21 | void copy_graph(const VertexListGraph& g_in, MutableGraph& g_out, |
---|
22 | const bgl_named_params<P, T, R>& params) |
---|
23 | |
---|
24 | |
---|
25 | template <typename IncidenceGraph, typename MutableGraph> |
---|
26 | typename graph_traits<MutableGraph>::vertex_descriptor |
---|
27 | copy_component(IncidenceGraph& g_in, |
---|
28 | typename graph_traits<IncidenceGraph>::vertex_descriptor src, |
---|
29 | MutableGraph& g_out) |
---|
30 | |
---|
31 | template <typename IncidenceGraph, typename MutableGraph, |
---|
32 | typename P, typename T, typename R> |
---|
33 | typename graph_traits<MutableGraph>::vertex_descriptor |
---|
34 | copy_component(IncidenceGraph& g_in, |
---|
35 | typename graph_traits<IncidenceGraph>::vertex_descriptor src, |
---|
36 | MutableGraph& g_out, |
---|
37 | const bgl_named_params<P, T, R>& params) |
---|
38 | */ |
---|
39 | |
---|
40 | |
---|
41 | #ifndef BOOST_GRAPH_COPY_HPP |
---|
42 | #define BOOST_GRAPH_COPY_HPP |
---|
43 | |
---|
44 | #include <boost/config.hpp> |
---|
45 | #include <vector> |
---|
46 | #include <boost/graph/graph_traits.hpp> |
---|
47 | #include <boost/property_map.hpp> |
---|
48 | #include <boost/graph/named_function_params.hpp> |
---|
49 | #include <boost/graph/breadth_first_search.hpp> |
---|
50 | #include <boost/type_traits/conversion_traits.hpp> |
---|
51 | |
---|
52 | namespace boost { |
---|
53 | |
---|
54 | namespace detail { |
---|
55 | |
---|
56 | // Default edge and vertex property copiers |
---|
57 | |
---|
58 | template <typename Graph1, typename Graph2> |
---|
59 | struct edge_copier { |
---|
60 | edge_copier(const Graph1& g1, Graph2& g2) |
---|
61 | : edge_all_map1(get(edge_all, g1)), |
---|
62 | edge_all_map2(get(edge_all, g2)) { } |
---|
63 | |
---|
64 | template <typename Edge1, typename Edge2> |
---|
65 | void operator()(const Edge1& e1, Edge2& e2) const { |
---|
66 | put(edge_all_map2, e2, get(edge_all_map1, e1)); |
---|
67 | } |
---|
68 | typename property_map<Graph1, edge_all_t>::const_type edge_all_map1; |
---|
69 | mutable typename property_map<Graph2, edge_all_t>::type edge_all_map2; |
---|
70 | }; |
---|
71 | template <typename Graph1, typename Graph2> |
---|
72 | inline edge_copier<Graph1,Graph2> |
---|
73 | make_edge_copier(const Graph1& g1, Graph2& g2) |
---|
74 | { |
---|
75 | return edge_copier<Graph1,Graph2>(g1, g2); |
---|
76 | } |
---|
77 | |
---|
78 | template <typename Graph1, typename Graph2> |
---|
79 | struct vertex_copier { |
---|
80 | vertex_copier(const Graph1& g1, Graph2& g2) |
---|
81 | : vertex_all_map1(get(vertex_all, g1)), |
---|
82 | vertex_all_map2(get(vertex_all, g2)) { } |
---|
83 | |
---|
84 | template <typename Vertex1, typename Vertex2> |
---|
85 | void operator()(const Vertex1& v1, Vertex2& v2) const { |
---|
86 | put(vertex_all_map2, v2, get(vertex_all_map1, v1)); |
---|
87 | } |
---|
88 | typename property_map<Graph1, vertex_all_t>::const_type vertex_all_map1; |
---|
89 | mutable typename property_map<Graph2, vertex_all_t>::type |
---|
90 | vertex_all_map2; |
---|
91 | }; |
---|
92 | template <typename Graph1, typename Graph2> |
---|
93 | inline vertex_copier<Graph1,Graph2> |
---|
94 | make_vertex_copier(const Graph1& g1, Graph2& g2) |
---|
95 | { |
---|
96 | return vertex_copier<Graph1,Graph2>(g1, g2); |
---|
97 | } |
---|
98 | |
---|
99 | // Copy all the vertices and edges of graph g_in into graph g_out. |
---|
100 | // The copy_vertex and copy_edge function objects control how vertex |
---|
101 | // and edge properties are copied. |
---|
102 | |
---|
103 | template <int Version> |
---|
104 | struct copy_graph_impl { }; |
---|
105 | |
---|
106 | template <> struct copy_graph_impl<0> |
---|
107 | { |
---|
108 | template <typename Graph, typename MutableGraph, |
---|
109 | typename CopyVertex, typename CopyEdge, typename IndexMap, |
---|
110 | typename Orig2CopyVertexIndexMap> |
---|
111 | static void apply(const Graph& g_in, MutableGraph& g_out, |
---|
112 | CopyVertex copy_vertex, CopyEdge copy_edge, |
---|
113 | Orig2CopyVertexIndexMap orig2copy, IndexMap) |
---|
114 | { |
---|
115 | typename graph_traits<Graph>::vertex_iterator vi, vi_end; |
---|
116 | for (tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { |
---|
117 | typename graph_traits<MutableGraph>::vertex_descriptor |
---|
118 | new_v = add_vertex(g_out); |
---|
119 | put(orig2copy, *vi, new_v); |
---|
120 | copy_vertex(*vi, new_v); |
---|
121 | } |
---|
122 | typename graph_traits<Graph>::edge_iterator ei, ei_end; |
---|
123 | for (tie(ei, ei_end) = edges(g_in); ei != ei_end; ++ei) { |
---|
124 | typename graph_traits<MutableGraph>::edge_descriptor new_e; |
---|
125 | bool inserted; |
---|
126 | tie(new_e, inserted) = add_edge(get(orig2copy, source(*ei, g_in)), |
---|
127 | get(orig2copy, target(*ei, g_in)), |
---|
128 | g_out); |
---|
129 | copy_edge(*ei, new_e); |
---|
130 | } |
---|
131 | } |
---|
132 | }; |
---|
133 | |
---|
134 | // for directed graphs |
---|
135 | template <> struct copy_graph_impl<1> |
---|
136 | { |
---|
137 | template <typename Graph, typename MutableGraph, |
---|
138 | typename CopyVertex, typename CopyEdge, typename IndexMap, |
---|
139 | typename Orig2CopyVertexIndexMap> |
---|
140 | static void apply(const Graph& g_in, MutableGraph& g_out, |
---|
141 | CopyVertex copy_vertex, CopyEdge copy_edge, |
---|
142 | Orig2CopyVertexIndexMap orig2copy, IndexMap) |
---|
143 | { |
---|
144 | typename graph_traits<Graph>::vertex_iterator vi, vi_end; |
---|
145 | for (tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { |
---|
146 | typename graph_traits<MutableGraph>::vertex_descriptor |
---|
147 | new_v = add_vertex(g_out); |
---|
148 | put(orig2copy, *vi, new_v); |
---|
149 | copy_vertex(*vi, new_v); |
---|
150 | } |
---|
151 | for (tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { |
---|
152 | typename graph_traits<Graph>::out_edge_iterator ei, ei_end; |
---|
153 | for (tie(ei, ei_end) = out_edges(*vi, g_in); ei != ei_end; ++ei) { |
---|
154 | typename graph_traits<MutableGraph>::edge_descriptor new_e; |
---|
155 | bool inserted; |
---|
156 | tie(new_e, inserted) = add_edge(get(orig2copy, source(*ei, g_in)), |
---|
157 | get(orig2copy, target(*ei, g_in)), |
---|
158 | g_out); |
---|
159 | copy_edge(*ei, new_e); |
---|
160 | } |
---|
161 | } |
---|
162 | } |
---|
163 | }; |
---|
164 | |
---|
165 | // for undirected graphs |
---|
166 | template <> struct copy_graph_impl<2> |
---|
167 | { |
---|
168 | template <typename Graph, typename MutableGraph, |
---|
169 | typename CopyVertex, typename CopyEdge, typename IndexMap, |
---|
170 | typename Orig2CopyVertexIndexMap> |
---|
171 | static void apply(const Graph& g_in, MutableGraph& g_out, |
---|
172 | CopyVertex copy_vertex, CopyEdge copy_edge, |
---|
173 | Orig2CopyVertexIndexMap orig2copy, |
---|
174 | IndexMap index_map) |
---|
175 | { |
---|
176 | typedef color_traits<default_color_type> Color; |
---|
177 | std::vector<default_color_type> |
---|
178 | color(num_vertices(g_in), Color::white()); |
---|
179 | typename graph_traits<Graph>::vertex_iterator vi, vi_end; |
---|
180 | for (tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { |
---|
181 | typename graph_traits<MutableGraph>::vertex_descriptor |
---|
182 | new_v = add_vertex(g_out); |
---|
183 | put(orig2copy, *vi, new_v); |
---|
184 | copy_vertex(*vi, new_v); |
---|
185 | } |
---|
186 | for (tie(vi, vi_end) = vertices(g_in); vi != vi_end; ++vi) { |
---|
187 | typename graph_traits<Graph>::out_edge_iterator ei, ei_end; |
---|
188 | for (tie(ei, ei_end) = out_edges(*vi, g_in); ei != ei_end; ++ei) { |
---|
189 | typename graph_traits<MutableGraph>::edge_descriptor new_e; |
---|
190 | bool inserted; |
---|
191 | if (color[get(index_map, target(*ei, g_in))] == Color::white()) { |
---|
192 | tie(new_e, inserted) = add_edge(get(orig2copy, source(*ei,g_in)), |
---|
193 | get(orig2copy, target(*ei,g_in)), |
---|
194 | g_out); |
---|
195 | copy_edge(*ei, new_e); |
---|
196 | } |
---|
197 | } |
---|
198 | color[get(index_map, *vi)] = Color::black(); |
---|
199 | } |
---|
200 | } |
---|
201 | }; |
---|
202 | |
---|
203 | template <class Graph> |
---|
204 | struct choose_graph_copy { |
---|
205 | typedef typename Graph::traversal_category Trv; |
---|
206 | typedef typename Graph::directed_category Dr; |
---|
207 | enum { algo = |
---|
208 | (is_convertible<Trv, vertex_list_graph_tag>::value |
---|
209 | && is_convertible<Trv, edge_list_graph_tag>::value) |
---|
210 | ? 0 : is_convertible<Dr, directed_tag>::value ? 1 : 2 }; |
---|
211 | typedef copy_graph_impl<algo> type; |
---|
212 | }; |
---|
213 | |
---|
214 | //------------------------------------------------------------------------- |
---|
215 | struct choose_copier_parameter { |
---|
216 | template <class P, class G1, class G2> |
---|
217 | struct bind_ { |
---|
218 | typedef const P& result_type; |
---|
219 | static result_type apply(const P& p, const G1&, G2&) |
---|
220 | { return p; } |
---|
221 | }; |
---|
222 | }; |
---|
223 | struct choose_default_edge_copier { |
---|
224 | template <class P, class G1, class G2> |
---|
225 | struct bind_ { |
---|
226 | typedef edge_copier<G1, G2> result_type; |
---|
227 | static result_type apply(const P&, const G1& g1, G2& g2) { |
---|
228 | return result_type(g1, g2); |
---|
229 | } |
---|
230 | }; |
---|
231 | }; |
---|
232 | template <class Param> |
---|
233 | struct choose_edge_copy { |
---|
234 | typedef choose_copier_parameter type; |
---|
235 | }; |
---|
236 | template <> |
---|
237 | struct choose_edge_copy<detail::error_property_not_found> { |
---|
238 | typedef choose_default_edge_copier type; |
---|
239 | }; |
---|
240 | template <class Param, class G1, class G2> |
---|
241 | struct choose_edge_copier_helper { |
---|
242 | typedef typename choose_edge_copy<Param>::type Selector; |
---|
243 | typedef typename Selector:: template bind_<Param, G1, G2> Bind; |
---|
244 | typedef Bind type; |
---|
245 | typedef typename Bind::result_type result_type; |
---|
246 | }; |
---|
247 | template <typename Param, typename G1, typename G2> |
---|
248 | typename detail::choose_edge_copier_helper<Param,G1,G2>::result_type |
---|
249 | choose_edge_copier(const Param& params, const G1& g_in, G2& g_out) |
---|
250 | { |
---|
251 | typedef typename |
---|
252 | detail::choose_edge_copier_helper<Param,G1,G2>::type Choice; |
---|
253 | return Choice::apply(params, g_in, g_out); |
---|
254 | } |
---|
255 | |
---|
256 | |
---|
257 | struct choose_default_vertex_copier { |
---|
258 | template <class P, class G1, class G2> |
---|
259 | struct bind_ { |
---|
260 | typedef vertex_copier<G1, G2> result_type; |
---|
261 | static result_type apply(const P&, const G1& g1, G2& g2) { |
---|
262 | return result_type(g1, g2); |
---|
263 | } |
---|
264 | }; |
---|
265 | }; |
---|
266 | template <class Param> |
---|
267 | struct choose_vertex_copy { |
---|
268 | typedef choose_copier_parameter type; |
---|
269 | }; |
---|
270 | template <> |
---|
271 | struct choose_vertex_copy<detail::error_property_not_found> { |
---|
272 | typedef choose_default_vertex_copier type; |
---|
273 | }; |
---|
274 | template <class Param, class G1, class G2> |
---|
275 | struct choose_vertex_copier_helper { |
---|
276 | typedef typename choose_vertex_copy<Param>::type Selector; |
---|
277 | typedef typename Selector:: template bind_<Param, G1, G2> Bind; |
---|
278 | typedef Bind type; |
---|
279 | typedef typename Bind::result_type result_type; |
---|
280 | }; |
---|
281 | template <typename Param, typename G1, typename G2> |
---|
282 | typename detail::choose_vertex_copier_helper<Param,G1,G2>::result_type |
---|
283 | choose_vertex_copier(const Param& params, const G1& g_in, G2& g_out) |
---|
284 | { |
---|
285 | typedef typename |
---|
286 | detail::choose_vertex_copier_helper<Param,G1,G2>::type Choice; |
---|
287 | return Choice::apply(params, g_in, g_out); |
---|
288 | } |
---|
289 | |
---|
290 | } // namespace detail |
---|
291 | |
---|
292 | |
---|
293 | template <typename VertexListGraph, typename MutableGraph> |
---|
294 | void copy_graph(const VertexListGraph& g_in, MutableGraph& g_out) |
---|
295 | { |
---|
296 | if (num_vertices(g_in) == 0) |
---|
297 | return; |
---|
298 | typedef typename graph_traits<MutableGraph>::vertex_descriptor vertex_t; |
---|
299 | std::vector<vertex_t> orig2copy(num_vertices(g_in)); |
---|
300 | typedef typename detail::choose_graph_copy<VertexListGraph>::type |
---|
301 | copy_impl; |
---|
302 | copy_impl::apply |
---|
303 | (g_in, g_out, |
---|
304 | detail::make_vertex_copier(g_in, g_out), |
---|
305 | detail::make_edge_copier(g_in, g_out), |
---|
306 | make_iterator_property_map(orig2copy.begin(), |
---|
307 | get(vertex_index, g_in), orig2copy[0]), |
---|
308 | get(vertex_index, g_in) |
---|
309 | ); |
---|
310 | } |
---|
311 | |
---|
312 | template <typename VertexListGraph, typename MutableGraph, |
---|
313 | class P, class T, class R> |
---|
314 | void copy_graph(const VertexListGraph& g_in, MutableGraph& g_out, |
---|
315 | const bgl_named_params<P, T, R>& params) |
---|
316 | { |
---|
317 | typename std::vector<T>::size_type n; |
---|
318 | n = is_default_param(get_param(params, orig_to_copy_t())) |
---|
319 | ? num_vertices(g_in) : 1; |
---|
320 | if (n == 0) |
---|
321 | return; |
---|
322 | std::vector<BOOST_DEDUCED_TYPENAME graph_traits<MutableGraph>::vertex_descriptor> |
---|
323 | orig2copy(n); |
---|
324 | |
---|
325 | typedef typename detail::choose_graph_copy<VertexListGraph>::type |
---|
326 | copy_impl; |
---|
327 | copy_impl::apply |
---|
328 | (g_in, g_out, |
---|
329 | detail::choose_vertex_copier(get_param(params, vertex_copy_t()), |
---|
330 | g_in, g_out), |
---|
331 | detail::choose_edge_copier(get_param(params, edge_copy_t()), |
---|
332 | g_in, g_out), |
---|
333 | choose_param(get_param(params, orig_to_copy_t()), |
---|
334 | make_iterator_property_map |
---|
335 | (orig2copy.begin(), |
---|
336 | choose_const_pmap(get_param(params, vertex_index), |
---|
337 | g_in, vertex_index), orig2copy[0])), |
---|
338 | choose_const_pmap(get_param(params, vertex_index), g_in, vertex_index) |
---|
339 | ); |
---|
340 | } |
---|
341 | |
---|
342 | namespace detail { |
---|
343 | |
---|
344 | template <class NewGraph, class Copy2OrigIndexMap, |
---|
345 | class CopyVertex, class CopyEdge> |
---|
346 | struct graph_copy_visitor : public bfs_visitor<> |
---|
347 | { |
---|
348 | graph_copy_visitor(NewGraph& graph, Copy2OrigIndexMap c, |
---|
349 | CopyVertex cv, CopyEdge ce) |
---|
350 | : g_out(graph), orig2copy(c), copy_vertex(cv), copy_edge(ce) { } |
---|
351 | |
---|
352 | template <class Vertex, class Graph> |
---|
353 | void examine_vertex(Vertex u, const Graph& g_in) const { |
---|
354 | typename graph_traits<NewGraph>::vertex_descriptor |
---|
355 | new_u = add_vertex(g_out); |
---|
356 | put(orig2copy, u, new_u); |
---|
357 | copy_vertex(u, new_u); |
---|
358 | } |
---|
359 | |
---|
360 | template <class Edge, class Graph> |
---|
361 | void examine_edge(Edge e, const Graph& g_in) const { |
---|
362 | typename graph_traits<NewGraph>::edge_descriptor new_e; |
---|
363 | bool inserted; |
---|
364 | tie(new_e, inserted) = add_edge(get(orig2copy, source(e, g_in)), |
---|
365 | get(orig2copy, target(e, g_in)), |
---|
366 | g_out); |
---|
367 | copy_edge(e, new_e); |
---|
368 | } |
---|
369 | private: |
---|
370 | NewGraph& g_out; |
---|
371 | Copy2OrigIndexMap orig2copy; |
---|
372 | CopyVertex copy_vertex; |
---|
373 | CopyEdge copy_edge; |
---|
374 | }; |
---|
375 | |
---|
376 | template <typename Graph, typename MutableGraph, |
---|
377 | typename CopyVertex, typename CopyEdge, |
---|
378 | typename Orig2CopyVertexIndexMap, typename Params> |
---|
379 | typename graph_traits<MutableGraph>::vertex_descriptor |
---|
380 | copy_component_impl |
---|
381 | (const Graph& g_in, |
---|
382 | typename graph_traits<Graph>::vertex_descriptor src, |
---|
383 | MutableGraph& g_out, |
---|
384 | CopyVertex copy_vertex, CopyEdge copy_edge, |
---|
385 | Orig2CopyVertexIndexMap orig2copy, |
---|
386 | const Params& params) |
---|
387 | { |
---|
388 | graph_copy_visitor<MutableGraph, Orig2CopyVertexIndexMap, |
---|
389 | CopyVertex, CopyEdge> vis(g_out, orig2copy, copy_vertex, copy_edge); |
---|
390 | breadth_first_search(g_in, src, params.visitor(vis)); |
---|
391 | return get(orig2copy, src); |
---|
392 | } |
---|
393 | |
---|
394 | } // namespace detail |
---|
395 | |
---|
396 | |
---|
397 | // Copy all the vertices and edges of graph g_in that are reachable |
---|
398 | // from the source vertex into graph g_out. Return the vertex |
---|
399 | // in g_out that matches the source vertex of g_in. |
---|
400 | template <typename IncidenceGraph, typename MutableGraph, |
---|
401 | typename P, typename T, typename R> |
---|
402 | typename graph_traits<MutableGraph>::vertex_descriptor |
---|
403 | copy_component(IncidenceGraph& g_in, |
---|
404 | typename graph_traits<IncidenceGraph>::vertex_descriptor src, |
---|
405 | MutableGraph& g_out, |
---|
406 | const bgl_named_params<P, T, R>& params) |
---|
407 | { |
---|
408 | typename std::vector<T>::size_type n; |
---|
409 | n = is_default_param(get_param(params, orig_to_copy_t())) |
---|
410 | ? num_vertices(g_in) : 1; |
---|
411 | std::vector<typename graph_traits<IncidenceGraph>::vertex_descriptor> |
---|
412 | orig2copy(n); |
---|
413 | |
---|
414 | return detail::copy_component_impl |
---|
415 | (g_in, src, g_out, |
---|
416 | detail::choose_vertex_copier(get_param(params, vertex_copy_t()), |
---|
417 | g_in, g_out), |
---|
418 | detail::choose_edge_copier(get_param(params, edge_copy_t()), |
---|
419 | g_in, g_out), |
---|
420 | choose_param(get_param(params, orig_to_copy_t()), |
---|
421 | make_iterator_property_map |
---|
422 | (orig2copy.begin(), |
---|
423 | choose_pmap(get_param(params, vertex_index), |
---|
424 | g_in, vertex_index), orig2copy[0])), |
---|
425 | params |
---|
426 | ); |
---|
427 | } |
---|
428 | |
---|
429 | template <typename IncidenceGraph, typename MutableGraph> |
---|
430 | typename graph_traits<MutableGraph>::vertex_descriptor |
---|
431 | copy_component(IncidenceGraph& g_in, |
---|
432 | typename graph_traits<IncidenceGraph>::vertex_descriptor src, |
---|
433 | MutableGraph& g_out) |
---|
434 | { |
---|
435 | std::vector<typename graph_traits<IncidenceGraph>::vertex_descriptor> |
---|
436 | orig2copy(num_vertices(g_in)); |
---|
437 | |
---|
438 | return detail::copy_component_impl |
---|
439 | (g_in, src, g_out, |
---|
440 | make_vertex_copier(g_in, g_out), |
---|
441 | make_edge_copier(g_in, g_out), |
---|
442 | make_iterator_property_map(orig2copy.begin(), |
---|
443 | get(vertex_index, g_in), orig2copy[0]), |
---|
444 | bgl_named_params<char,char>('x') // dummy param object |
---|
445 | ); |
---|
446 | } |
---|
447 | |
---|
448 | } // namespace boost |
---|
449 | |
---|
450 | #endif // BOOST_GRAPH_COPY_HPP |
---|