author | hgs |
Tue, 20 Jul 2010 16:35:53 +0530 | |
changeset 44 | 97b0fb8a2cc2 |
parent 22 | ddc455616bd6 |
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permissions | -rw-r--r-- |
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// Boost.Graph library isomorphism test |
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// Copyright (C) 2001-20044 Douglas Gregor (dgregor at cs dot indiana dot edu) |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// For more information, see http://www.boost.org |
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// |
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// Revision History: |
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// |
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// 29 Nov 2001 Jeremy Siek |
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// Changed to use Boost.Random. |
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// 29 Nov 2001 Doug Gregor |
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// Initial checkin. |
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/* |
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* © Portions copyright (c) 2006-2007 Nokia Corporation. All rights reserved. |
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*/ |
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#include <iostream> |
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#include <fstream> |
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#include <map> |
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#include <algorithm> |
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#include <cstdlib> |
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#include <time.h> // clock used without std:: qualifier? |
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#include <boost/test/minimal.hpp> |
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#include <boost/graph/adjacency_list.hpp> |
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#include <boost/graph/isomorphism.hpp> |
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#include <boost/property_map.hpp> |
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#include <boost/random/variate_generator.hpp> |
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#include <boost/random/uniform_real.hpp> |
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#include <boost/random/uniform_int.hpp> |
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#include <boost/random/mersenne_twister.hpp> |
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#include <boost/lexical_cast.hpp> |
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#ifdef __SYMBIAN32__ |
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#include "std_log_result.h" |
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#define LOG_FILENAME_LINE __FILE__, __LINE__ |
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#endif |
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using namespace boost; |
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template <typename Generator> |
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struct random_functor { |
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random_functor(Generator& g) : g(g) { } |
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std::size_t operator()(std::size_t n) { |
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boost::uniform_int<std::size_t> distrib(0, n-1); |
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boost::variate_generator<boost::mt19937&, boost::uniform_int<std::size_t> > |
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x(g, distrib); |
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return x(); |
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} |
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Generator& g; |
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}; |
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template<typename Graph1, typename Graph2> |
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void randomly_permute_graph(const Graph1& g1, Graph2& g2) |
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{ |
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// Need a clean graph to start with |
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BOOST_REQUIRE(num_vertices(g2) == 0); |
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BOOST_REQUIRE(num_edges(g2) == 0); |
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typedef typename graph_traits<Graph1>::vertex_descriptor vertex1; |
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typedef typename graph_traits<Graph2>::vertex_descriptor vertex2; |
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typedef typename graph_traits<Graph1>::edge_iterator edge_iterator; |
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boost::mt19937 gen; |
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random_functor<boost::mt19937> rand_fun(gen); |
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// Decide new order |
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std::vector<vertex1> orig_vertices; |
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std::copy(vertices(g1).first, vertices(g1).second, std::back_inserter(orig_vertices)); |
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std::random_shuffle(orig_vertices.begin(), orig_vertices.end(), rand_fun); |
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std::map<vertex1, vertex2> vertex_map; |
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for (std::size_t i = 0; i < num_vertices(g1); ++i) { |
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vertex_map[orig_vertices[i]] = add_vertex(g2); |
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} |
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for (edge_iterator e = edges(g1).first; e != edges(g1).second; ++e) { |
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add_edge(vertex_map[source(*e, g1)], vertex_map[target(*e, g1)], g2); |
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} |
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} |
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template<typename Graph> |
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void generate_random_digraph(Graph& g, double edge_probability) |
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{ |
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typedef typename graph_traits<Graph>::vertex_iterator vertex_iterator; |
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boost::mt19937 random_gen; |
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boost::uniform_real<double> distrib(0.0, 1.0); |
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boost::variate_generator<boost::mt19937&, boost::uniform_real<double> > |
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random_dist(random_gen, distrib); |
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for (vertex_iterator u = vertices(g).first; u != vertices(g).second; ++u) { |
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vertex_iterator v = u; |
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++v; |
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for (; v != vertices(g).second; ++v) { |
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if (random_dist() <= edge_probability) |
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add_edge(*u, *v, g); |
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} |
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} |
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} |
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void test_isomorphism(int n, double edge_probability) |
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{ |
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typedef adjacency_list<vecS, vecS, bidirectionalS> graph1; |
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typedef adjacency_list<listS, listS, bidirectionalS, |
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property<vertex_index_t, int> > graph2; |
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graph1 g1(n); |
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generate_random_digraph(g1, edge_probability); |
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graph2 g2; |
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randomly_permute_graph(g1, g2); |
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int v_idx = 0; |
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for (graph2::vertex_iterator v = vertices(g2).first; |
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v != vertices(g2).second; ++v) { |
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put(vertex_index_t(), g2, *v, v_idx++); |
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} |
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std::map<graph1::vertex_descriptor, graph2::vertex_descriptor> mapping; |
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bool isomorphism_correct = true; |
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clock_t start = clock(); |
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isomorphism_correct = isomorphism(g1, g2, isomorphism_map(make_assoc_property_map(mapping))); |
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BOOST_CHECK(isomorphism_correct); |
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clock_t end = clock(); |
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std::cout << "Elapsed time (clock cycles): " << (end - start) << std::endl; |
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bool verify_correct = true; |
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verify_correct = verify_isomorphism(g1, g2, make_assoc_property_map(mapping)); |
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BOOST_CHECK(verify_correct); |
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if (!isomorphism_correct || !verify_correct) { |
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// Output graph 1 |
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{ |
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std::ofstream out("isomorphism_failure.bg1"); |
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out << num_vertices(g1) << std::endl; |
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for (graph1::edge_iterator e = edges(g1).first; |
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e != edges(g1).second; ++e) { |
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out << get(vertex_index_t(), g1, source(*e, g1)) << ' ' |
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<< get(vertex_index_t(), g1, target(*e, g1)) << std::endl; |
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} |
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} |
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|
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// Output graph 2 |
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{ |
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std::ofstream out("isomorphism_failure.bg2"); |
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out << num_vertices(g2) << std::endl; |
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for (graph2::edge_iterator e = edges(g2).first; |
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e != edges(g2).second; ++e) { |
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out << get(vertex_index_t(), g2, source(*e, g2)) << ' ' |
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<< get(vertex_index_t(), g2, target(*e, g2)) << std::endl; |
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} |
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} |
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} |
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} |
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int test_main(int argc, char* argv[]) |
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{ |
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if (argc < 3) { |
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test_isomorphism(30, 0.45); |
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#ifdef __SYMBIAN32__ |
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std_log(LOG_FILENAME_LINE,"[End Test Case ]"); |
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|
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testResultXml("isomorphism"); |
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close_log_file(); |
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#endif |
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return 0; |
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} |
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|
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int n = boost::lexical_cast<int>(argv[1]); |
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double edge_prob = boost::lexical_cast<double>(argv[2]); |
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test_isomorphism(n, edge_prob); |
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|
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#ifdef __SYMBIAN32__ |
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std_log(LOG_FILENAME_LINE,"[End Test Case ]"); |
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testResultXml("isomorphism"); |
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close_log_file(); |
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#endif |
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return 0; |
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} |