Added boost header

2012-01-08 01:26:07 +00:00
parent 9c3faaca40
commit c7d752cdf8
8946 changed files with 1732316 additions and 0 deletions
--- a/test/external/boost/graph/prim_minimum_spanning_tree.hpp
+++ b/test/external/boost/graph/prim_minimum_spanning_tree.hpp
@@ -0,0 +1,91 @@
+//=======================================================================
+// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
+// Authors: Andrew Lumsdaine, Lie-Quan Lee, 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)
+//=======================================================================
+//
+#ifndef BOOST_GRAPH_MST_PRIM_HPP
+#define BOOST_GRAPH_MST_PRIM_HPP
+
+#include <functional>
+#include <boost/graph/graph_traits.hpp>
+#include <boost/graph/dijkstra_shortest_paths.hpp>
+
+namespace boost {
+  
+  namespace detail {
+    // this should be somewhere else in boost...
+    template <class U, class V> struct _project2nd {
+      V operator()(U, V v) const { return v; }
+    };
+  }
+
+  namespace detail {
+
+    // This is Prim's algorithm to calculate the Minimum Spanning Tree
+    // for an undirected graph with weighted edges.
+
+    template <class Graph, class P, class T, class R, class Weight>
+    inline void
+    prim_mst_impl(const Graph& G,
+                  typename graph_traits<Graph>::vertex_descriptor s,
+                  const bgl_named_params<P,T,R>& params,
+                  Weight)
+    {
+      typedef typename property_traits<Weight>::value_type W;
+      std::less<W> compare;
+      detail::_project2nd<W,W> combine;
+      dijkstra_shortest_paths(G, s, params.distance_compare(compare).
+                              distance_combine(combine));
+    }
+  } // namespace detail
+
+  template <class VertexListGraph, class DijkstraVisitor, 
+            class PredecessorMap, class DistanceMap,
+            class WeightMap, class IndexMap>
+  inline void
+  prim_minimum_spanning_tree
+    (const VertexListGraph& g,
+     typename graph_traits<VertexListGraph>::vertex_descriptor s, 
+     PredecessorMap predecessor, DistanceMap distance, WeightMap weight, 
+     IndexMap index_map,
+     DijkstraVisitor vis)
+  {
+    typedef typename property_traits<WeightMap>::value_type W;
+    std::less<W> compare;
+    detail::_project2nd<W,W> combine;
+    dijkstra_shortest_paths(g, s, predecessor, distance, weight, index_map,
+                            compare, combine, (std::numeric_limits<W>::max)(), 0,
+                            vis);
+  }
+
+  template <class VertexListGraph, class PredecessorMap,
+            class P, class T, class R>
+  inline void prim_minimum_spanning_tree
+    (const VertexListGraph& g,
+     PredecessorMap p_map,
+     const bgl_named_params<P,T,R>& params)
+  {
+    detail::prim_mst_impl
+      (g, 
+       choose_param(get_param(params, root_vertex_t()), *vertices(g).first), 
+       params.predecessor_map(p_map),
+       choose_const_pmap(get_param(params, edge_weight), g, edge_weight));
+  }
+
+  template <class VertexListGraph, class PredecessorMap>
+  inline void prim_minimum_spanning_tree
+    (const VertexListGraph& g, PredecessorMap p_map)
+  {
+    detail::prim_mst_impl
+      (g, *vertices(g).first, predecessor_map(p_map).
+       weight_map(get(edge_weight, g)),
+       get(edge_weight, g));
+  }
+
+} // namespace boost
+
+#endif // BOOST_GRAPH_MST_PRIM_HPP