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Diffstat (limited to 'src/boost/libs/graph/test/undirected_dfs.cpp')
-rw-r--r-- | src/boost/libs/graph/test/undirected_dfs.cpp | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/src/boost/libs/graph/test/undirected_dfs.cpp b/src/boost/libs/graph/test/undirected_dfs.cpp new file mode 100644 index 00000000..74e7d388 --- /dev/null +++ b/src/boost/libs/graph/test/undirected_dfs.cpp @@ -0,0 +1,202 @@ +//======================================================================= +// Copyright 2001 University of Notre Dame. +// Author: Jeremy G. Siek +// +// 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) +//======================================================================= + +#include <boost/config.hpp> +#include <boost/test/minimal.hpp> +#include <stdlib.h> + +#include <boost/graph/undirected_dfs.hpp> +#include <boost/graph/adjacency_list.hpp> +#include <boost/graph/graph_archetypes.hpp> +#include <boost/graph/graph_utility.hpp> +#include <boost/graph/random.hpp> + +#include <boost/random/mersenne_twister.hpp> + +template <typename ColorMap, typename ParentMap, + typename DiscoverTimeMap, typename FinishTimeMap> +class dfs_test_visitor { + typedef typename boost::property_traits<ColorMap>::value_type ColorValue; + typedef typename boost::color_traits<ColorValue> Color; +public: + dfs_test_visitor(ColorMap color, ParentMap p, DiscoverTimeMap d, + FinishTimeMap f) + : m_color(color), m_parent(p), + m_discover_time(d), m_finish_time(f), m_time(0) { } + + template <class Vertex, class Graph> + void initialize_vertex(Vertex u, Graph&) { + BOOST_CHECK( boost::get(m_color, u) == Color::white() ); + } + template <class Vertex, class Graph> + void start_vertex(Vertex u, Graph&) { + BOOST_CHECK( boost::get(m_color, u) == Color::white() ); + } + template <class Vertex, class Graph> + void discover_vertex(Vertex u, Graph&) { + using namespace boost; + BOOST_CHECK( get(m_color, u) == Color::gray() ); + BOOST_CHECK( get(m_color, get(m_parent, u)) == Color::gray() ); + + put(m_discover_time, u, m_time++); + } + template <class Edge, class Graph> + void examine_edge(Edge e, Graph& g) { + using namespace boost; + BOOST_CHECK( get(m_color, source(e, g)) == Color::gray() ); + } + template <class Edge, class Graph> + void tree_edge(Edge e, Graph& g) { + using namespace boost; + BOOST_CHECK( get(m_color, target(e, g)) == Color::white() ); + + put(m_parent, target(e, g), source(e, g)); + } + template <class Edge, class Graph> + void back_edge(Edge e, Graph& g) { + using namespace boost; + BOOST_CHECK( get(m_color, target(e, g)) == Color::gray() ); + } + template <class Edge, class Graph> + void forward_or_cross_edge(Edge e, Graph& g) { + using namespace boost; + BOOST_CHECK( get(m_color, target(e, g)) == Color::black() ); + } + template <class Edge, class Graph> + void finish_edge(Edge e, Graph& g) { + using namespace boost; + BOOST_CHECK( + (get(m_color, target(e, g)) == Color::gray()) + || (get(m_color, target(e, g)) == Color::black()) + ); + } + template <class Vertex, class Graph> + void finish_vertex(Vertex u, Graph&) { + using namespace boost; + BOOST_CHECK( get(m_color, u) == Color::black() ); + + put(m_finish_time, u, m_time++); + } +private: + ColorMap m_color; + ParentMap m_parent; + DiscoverTimeMap m_discover_time; + FinishTimeMap m_finish_time; + typename boost::property_traits<DiscoverTimeMap>::value_type m_time; +}; + +template <typename Graph> +struct dfs_test +{ + typedef boost::graph_traits<Graph> Traits; + typedef typename Traits::vertices_size_type + vertices_size_type; + + static void go(vertices_size_type max_V) { + using namespace boost; + typedef typename Traits::vertex_descriptor vertex_descriptor; + typedef typename boost::property_map<Graph, + boost::vertex_color_t>::type ColorMap; + typedef typename boost::property_traits<ColorMap>::value_type ColorValue; + typedef typename boost::color_traits<ColorValue> Color; + typedef typename boost::property_map<Graph, + boost::edge_color_t>::type EColorMap; + typedef typename boost::property_traits<EColorMap>::value_type EColorValue; + typedef typename boost::color_traits<EColorValue> EColor; + + vertices_size_type i, k; + typename Traits::edges_size_type j; + typename Traits::vertex_iterator vi, vi_end, ui, ui_end; + typename Traits::edge_iterator ei, ei_end; + + boost::mt19937 gen; + + for (i = 0; i < max_V; ++i) + for (j = 0; j < i*i; ++j) { + Graph g; + generate_random_graph(g, i, j, gen); + + ColorMap color = get(boost::vertex_color, g); + EColorMap e_color = get(boost::edge_color, g); + std::vector<vertex_descriptor> parent(num_vertices(g)); + for (k = 0; k < num_vertices(g); ++k) + parent[k] = k; + std::vector<int> discover_time(num_vertices(g)), + finish_time(num_vertices(g)); + + // Get vertex index map + typedef typename boost::property_map<Graph, boost::vertex_index_t>::const_type idx_type; + idx_type idx = get(boost::vertex_index, g); + + typedef + boost::iterator_property_map<typename std::vector<vertex_descriptor>::iterator, idx_type> + parent_pm_type; + parent_pm_type parent_pm(parent.begin(), idx); + typedef + boost::iterator_property_map<std::vector<int>::iterator, idx_type> + time_pm_type; + time_pm_type discover_time_pm(discover_time.begin(), idx); + time_pm_type finish_time_pm(finish_time.begin(), idx); + + dfs_test_visitor<ColorMap, parent_pm_type, + time_pm_type, time_pm_type> + vis(color, parent_pm, + discover_time_pm, finish_time_pm); + + boost::undirected_dfs(g, visitor(vis).color_map(color) + .edge_color_map(e_color)); + + // all vertices should be black + for (boost::tie(vi, vi_end) = vertices(g); vi != vi_end; ++vi) + BOOST_CHECK(get(color, *vi) == Color::black()); + + // all edges should be black + for (boost::tie(ei, ei_end) = edges(g); ei != ei_end; ++ei) + BOOST_CHECK(get(e_color, *ei) == EColor::black()); + + // check parenthesis structure of discover/finish times + // See CLR p.480 + for (boost::tie(ui, ui_end) = vertices(g); ui != ui_end; ++ui) + for (boost::tie(vi, vi_end) = vertices(g); vi != vi_end; ++vi) { + vertex_descriptor u = *ui, v = *vi; + if (u != v) { + BOOST_CHECK( finish_time[u] < discover_time[v] + || finish_time[v] < discover_time[u] + || (discover_time[v] < discover_time[u] + && finish_time[u] < finish_time[v] + && boost::is_descendant(u, v, parent_pm)) + || (discover_time[u] < discover_time[v] + && finish_time[v] < finish_time[u] + && boost::is_descendant(v, u, parent_pm)) + ); + } + } + } + + } +}; + + +// usage: undirected_dfs.exe [max-vertices=15] + +int test_main(int argc, char* argv[]) +{ + int max_V = 7; + if (argc > 1) + max_V = atoi(argv[1]); + + // Test undirected graphs. + dfs_test< boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS, + boost::property<boost::vertex_color_t, boost::default_color_type>, + boost::property<boost::edge_color_t, boost::default_color_type> > + >::go(max_V); + + return 0; +} + |