143 lines
3.9 KiB
C++
143 lines
3.9 KiB
C++
// (C) Copyright 2007-2009 Andrew Sutton
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//
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0 (See accompanying file
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// LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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#include <iostream>
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#include <boost/graph/undirected_graph.hpp>
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#include <boost/graph/directed_graph.hpp>
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#include <boost/graph/floyd_warshall_shortest.hpp>
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#include <boost/graph/eccentricity.hpp>
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#include <boost/graph/exterior_property.hpp>
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#include <boost/graph/property_maps/constant_property_map.hpp>
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using namespace std;
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using namespace boost;
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// number of vertices in the graph
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static const unsigned N = 5;
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template <typename Graph>
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struct vertex_vector
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{
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typedef graph_traits<Graph> traits;
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typedef vector<typename traits::vertex_descriptor> type;
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};
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template <typename Graph>
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void build_graph(Graph& g,
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typename vertex_vector<Graph>::type& v)
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{
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// add vertices
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for(size_t i = 0; i < N; ++i) {
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v[i] = add_vertex(g);
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}
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// add edges
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add_edge(v[0], v[1], g);
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add_edge(v[1], v[2], g);
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add_edge(v[2], v[0], g);
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add_edge(v[3], v[4], g);
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add_edge(v[4], v[0], g);
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}
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template <typename Graph>
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void test_undirected()
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{
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typedef typename graph_traits<Graph>::vertex_descriptor Vertex;
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typedef typename graph_traits<Graph>::edge_descriptor Edge;
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typedef exterior_vertex_property<Graph, int> EccentricityProperty;
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typedef typename EccentricityProperty::container_type EccentricityContainer;
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typedef typename EccentricityProperty::map_type EccentricityMap;
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typedef exterior_vertex_property<Graph, int> DistanceProperty;
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typedef typename DistanceProperty::matrix_type DistanceMatrix;
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typedef typename DistanceProperty::matrix_map_type DistanceMatrixMap;
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typedef constant_property_map<Edge, int> WeightMap;
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Graph g;
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vector<Vertex> v(N);
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build_graph(g, v);
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EccentricityContainer eccs(num_vertices(g));
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DistanceMatrix distances(num_vertices(g));
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EccentricityMap em(eccs, g);
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DistanceMatrixMap dm(distances, g);
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WeightMap wm(1);
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floyd_warshall_all_pairs_shortest_paths(g, dm, weight_map(wm));
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all_eccentricities(g, dm, em);
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int rad = radius(g, em);
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int dia = diameter(g, em);
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BOOST_ASSERT(em[v[0]] == 2);
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BOOST_ASSERT(em[v[1]] == 3);
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BOOST_ASSERT(em[v[2]] == 3);
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BOOST_ASSERT(em[v[3]] == 3);
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BOOST_ASSERT(em[v[4]] == 2);
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BOOST_ASSERT(rad == 2);
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BOOST_ASSERT(dia == 3);
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}
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template <typename Graph>
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void test_directed()
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{
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typedef typename graph_traits<Graph>::vertex_descriptor Vertex;
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typedef typename graph_traits<Graph>::edge_descriptor Edge;
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typedef exterior_vertex_property<Graph, int> EccentricityProperty;
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typedef typename EccentricityProperty::container_type EccentricityContainer;
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typedef typename EccentricityProperty::map_type EccentricityMap;
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typedef exterior_vertex_property<Graph, int> DistanceProperty;
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typedef typename DistanceProperty::matrix_type DistanceMatrix;
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typedef typename DistanceProperty::matrix_map_type DistanceMatrixMap;
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typedef constant_property_map<Edge, int> WeightMap;
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Graph g;
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vector<Vertex> v(N);
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build_graph(g, v);
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EccentricityContainer eccs(num_vertices(g));
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DistanceMatrix distances(num_vertices(g));
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EccentricityMap em(eccs, g);
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DistanceMatrixMap dm(distances, g);
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WeightMap wm(1);
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floyd_warshall_all_pairs_shortest_paths(g, dm, weight_map(wm));
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all_eccentricities(g, dm, em);
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int rad = radius(g, em);
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int dia = diameter(g, em);
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int inf = numeric_values<int>::infinity();
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BOOST_ASSERT(em[v[0]] == inf);
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BOOST_ASSERT(em[v[1]] == inf);
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BOOST_ASSERT(em[v[2]] == inf);
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BOOST_ASSERT(em[v[3]] == 4);
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BOOST_ASSERT(em[v[4]] == inf);
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BOOST_ASSERT(rad == 4);
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BOOST_ASSERT(dia == inf);
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}
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int
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main(int, char *[])
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{
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typedef undirected_graph<> Graph;
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typedef directed_graph<> Digraph;
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test_undirected<Graph>();
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test_directed<Digraph>();
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}
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