stdcpp/tsrc/Boost_test/graph/src/bfs-example.cpp
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//=======================================================================
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// Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee, 
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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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//=======================================================================
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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 <boost/graph/adjacency_list.hpp>
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#include <boost/graph/breadth_first_search.hpp>
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#include <boost/pending/indirect_cmp.hpp>
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#include <boost/pending/integer_range.hpp>
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#include <iostream>
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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 TimeMap > class bfs_time_visitor:public default_bfs_visitor {
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  typedef typename property_traits < TimeMap >::value_type T;
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public:
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  bfs_time_visitor(TimeMap tmap, T & t):m_timemap(tmap), m_time(t) { }
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  template < typename Vertex, typename Graph >
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    void discover_vertex(Vertex u, const Graph & g) const
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  {
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    put(m_timemap, u, m_time++);
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  }
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  TimeMap m_timemap;
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  T & m_time;
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};
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int
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main()
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{
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  using namespace boost;
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  // Select the graph type we wish to use
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  typedef adjacency_list < vecS, vecS, undirectedS > graph_t;
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  // Set up the vertex IDs and names
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  enum { r, s, t, u, v, w, x, y, N };
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  const char *name = "rstuvwxy";
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  // Specify the edges in the graph
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  typedef std::pair < int, int >E;
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  E edge_array[] = { E(r, s), E(r, v), E(s, w), E(w, r), E(w, t),
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    E(w, x), E(x, t), E(t, u), E(x, y), E(u, y)
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  };
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  // Create the graph object
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  const int n_edges = sizeof(edge_array) / sizeof(E);
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#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
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  // VC++ has trouble with the edge iterator constructor
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  graph_t g(N);
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  for (std::size_t j = 0; j < n_edges; ++j)
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    add_edge(edge_array[j].first, edge_array[j].second, g);
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#else
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  typedef graph_traits<graph_t>::vertices_size_type v_size_t;
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  graph_t g(edge_array, edge_array + n_edges, v_size_t(N));
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#endif
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  // Typedefs
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  typedef graph_traits < graph_t >::vertex_descriptor Vertex;
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  typedef graph_traits < graph_t >::vertices_size_type Size;
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  typedef Size* Iiter;
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  // a vector to hold the discover time property for each vertex
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  std::vector < Size > dtime(num_vertices(g));
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  Size time = 0;
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  bfs_time_visitor < Size * >vis(&dtime[0], time);
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  breadth_first_search(g, vertex(s, g), visitor(vis));
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  // Use std::sort to order the vertices by their discover time
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  std::vector<graph_traits<graph_t>::vertices_size_type > discover_order(N);
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  integer_range < int >range(0, N);
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  std::copy(range.begin(), range.end(), discover_order.begin());
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  std::sort(discover_order.begin(), discover_order.end(),
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            indirect_cmp < Iiter, std::less < Size > >(&dtime[0]));
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  std::cout << "order of discovery: ";
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  for (int i = 0; i < N; ++i)
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    std::cout << name[discover_order[i]] << " ";
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  std::cout << std::endl;
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   #ifdef __SYMBIAN32__
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	std_log(LOG_FILENAME_LINE,"[End Test Case ]");
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  	testResultXml("bfs-example");
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	close_log_file();
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  #endif
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  return EXIT_SUCCESS;
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}