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// Boost.Graph library isomorphism test
// Copyright (C) 2001-20044 Douglas Gregor (dgregor at cs dot indiana dot edu)
//
// 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)
// For more information, see http://www.boost.org
//
// Revision History:
//
// 29 Nov 2001 Jeremy Siek
// Changed to use Boost.Random.
// 29 Nov 2001 Doug Gregor
// Initial checkin.
#include <iostream>
#include <fstream>
#include <map>
#include <algorithm>
#include <cstdlib>
#include <time.h> // clock used without std:: qualifier?
#include <boost/test/minimal.hpp>
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/isomorphism.hpp>
#include <boost/property_map.hpp>
#include <boost/random/variate_generator.hpp>
#include <boost/random/uniform_real.hpp>
#include <boost/random/uniform_int.hpp>
#include <boost/random/mersenne_twister.hpp>
#include <boost/lexical_cast.hpp>
using namespace boost;
template <typename Generator>
struct random_functor {
random_functor(Generator& g) : g(g) { }
std::size_t operator()(std::size_t n) {
boost::uniform_int<std::size_t> distrib(0, n-1);
boost::variate_generator<boost::mt19937&, boost::uniform_int<std::size_t> >
x(g, distrib);
return x();
}
Generator& g;
};
template<typename Graph1, typename Graph2>
void randomly_permute_graph(const Graph1& g1, Graph2& g2)
{
// Need a clean graph to start with
assert(num_vertices(g2) == 0);
assert(num_edges(g2) == 0);
typedef typename graph_traits<Graph1>::vertex_descriptor vertex1;
typedef typename graph_traits<Graph2>::vertex_descriptor vertex2;
typedef typename graph_traits<Graph1>::edge_iterator edge_iterator;
boost::mt19937 gen;
random_functor<boost::mt19937> rand_fun(gen);
// Decide new order
std::vector<vertex1> orig_vertices;
std::copy(vertices(g1).first, vertices(g1).second, std::back_inserter(orig_vertices));
std::random_shuffle(orig_vertices.begin(), orig_vertices.end(), rand_fun);
std::map<vertex1, vertex2> vertex_map;
for (std::size_t i = 0; i < num_vertices(g1); ++i) {
vertex_map[orig_vertices[i]] = add_vertex(g2);
}
for (edge_iterator e = edges(g1).first; e != edges(g1).second; ++e) {
add_edge(vertex_map[source(*e, g1)], vertex_map[target(*e, g1)], g2);
}
}
template<typename Graph>
void generate_random_digraph(Graph& g, double edge_probability)
{
typedef typename graph_traits<Graph>::vertex_iterator vertex_iterator;
boost::mt19937 random_gen;
boost::uniform_real<double> distrib(0.0, 1.0);
boost::variate_generator<boost::mt19937&, boost::uniform_real<double> >
random_dist(random_gen, distrib);
for (vertex_iterator u = vertices(g).first; u != vertices(g).second; ++u) {
vertex_iterator v = u;
++v;
for (; v != vertices(g).second; ++v) {
if (random_dist() <= edge_probability)
add_edge(*u, *v, g);
}
}
}
void test_isomorphism(int n, double edge_probability)
{
typedef adjacency_list<vecS, vecS, bidirectionalS> graph1;
typedef adjacency_list<listS, listS, bidirectionalS,
property<vertex_index_t, int> > graph2;
graph1 g1(n);
generate_random_digraph(g1, edge_probability);
graph2 g2;
randomly_permute_graph(g1, g2);
int v_idx = 0;
for (graph2::vertex_iterator v = vertices(g2).first;
v != vertices(g2).second; ++v) {
put(vertex_index_t(), g2, *v, v_idx++);
}
std::map<graph1::vertex_descriptor, graph2::vertex_descriptor> mapping;
bool isomorphism_correct;
clock_t start = clock();
BOOST_CHECK(isomorphism_correct = isomorphism
(g1, g2, isomorphism_map(make_assoc_property_map(mapping))));
clock_t end = clock();
std::cout << "Elapsed time (clock cycles): " << (end - start) << std::endl;
bool verify_correct;
BOOST_CHECK(verify_correct =
verify_isomorphism(g1, g2, make_assoc_property_map(mapping)));
if (!isomorphism_correct || !verify_correct) {
// Output graph 1
{
std::ofstream out("isomorphism_failure.bg1");
out << num_vertices(g1) << std::endl;
for (graph1::edge_iterator e = edges(g1).first;
e != edges(g1).second; ++e) {
out << get(vertex_index_t(), g1, source(*e, g1)) << ' '
<< get(vertex_index_t(), g1, target(*e, g1)) << std::endl;
}
}
// Output graph 2
{
std::ofstream out("isomorphism_failure.bg2");
out << num_vertices(g2) << std::endl;
for (graph2::edge_iterator e = edges(g2).first;
e != edges(g2).second; ++e) {
out << get(vertex_index_t(), g2, source(*e, g2)) << ' '
<< get(vertex_index_t(), g2, target(*e, g2)) << std::endl;
}
}
}
}
int test_main(int argc, char* argv[])
{
if (argc < 3) {
test_isomorphism(30, 0.45);
return 0;
}
int n = boost::lexical_cast<int>(argv[1]);
double edge_prob = boost::lexical_cast<double>(argv[2]);
test_isomorphism(n, edge_prob);
return 0;
}
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