Added boost header

test/external/boost/graph/johnson_all_pairs_shortest.hpp

@@ -0,0 +1,204 @@
+//=======================================================================
+// 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)
+//=======================================================================
+
+/*
+  This file implements the function
+
+  template <class VertexAndEdgeListGraph, class DistanceMatrix,
+            class P, class T, class R>
+  bool
+  johnson_all_pairs_shortest_paths
+    (VertexAndEdgeListGraph& g, 
+     DistanceMatrix& D,
+     const bgl_named_params<P, T, R>& params)
+ */
+
+#ifndef BOOST_GRAPH_JOHNSON_HPP
+#define BOOST_GRAPH_JOHNSON_HPP
+
+#include <boost/graph/graph_traits.hpp>
+#include <boost/property_map/property_map.hpp>
+#include <boost/property_map/shared_array_property_map.hpp>
+#include <boost/graph/bellman_ford_shortest_paths.hpp>
+#include <boost/graph/dijkstra_shortest_paths.hpp>
+#include <boost/graph/adjacency_list.hpp>
+#include <boost/type_traits/same_traits.hpp>
+
+namespace boost {
+
+  template <class VertexAndEdgeListGraph, class DistanceMatrix,
+            class VertexID, class Weight, typename BinaryPredicate, 
+            typename BinaryFunction, typename Infinity, class DistanceZero>
+  bool
+  johnson_all_pairs_shortest_paths(VertexAndEdgeListGraph& g1, 
+               DistanceMatrix& D,
+               VertexID id1, Weight w1, const BinaryPredicate& compare, 
+               const BinaryFunction& combine, const Infinity& inf,
+               DistanceZero zero)
+  {
+    typedef graph_traits<VertexAndEdgeListGraph> Traits1;
+    typedef typename property_traits<Weight>::value_type DT;
+    function_requires< BasicMatrixConcept<DistanceMatrix,
+      typename Traits1::vertices_size_type, DT> >();
+
+    typedef typename Traits1::directed_category DirCat;
+    bool is_undirected = is_same<DirCat, undirected_tag>::value;
+
+    typedef adjacency_list<vecS, vecS, directedS, 
+      property< vertex_distance_t, DT>,
+      property< edge_weight_t, DT, 
+      property< edge_weight2_t, DT > > > Graph2;
+    typedef graph_traits<Graph2> Traits2;
+
+    Graph2 g2(num_vertices(g1) + 1);
+    typename property_map<Graph2, edge_weight_t>::type 
+      w = get(edge_weight, g2);
+    typename property_map<Graph2, edge_weight2_t>::type 
+      w_hat = get(edge_weight2, g2);
+    typename property_map<Graph2, vertex_distance_t>::type 
+      d = get(vertex_distance, g2);
+    typedef typename property_map<Graph2, vertex_index_t>::type VertexID2;
+    VertexID2 id2 = get(vertex_index, g2);
+
+    // Construct g2 where V[g2] = V[g1] U {s}
+    //   and  E[g2] = E[g1] U {(s,v)| v in V[g1]}
+    std::vector<typename Traits1::vertex_descriptor> 
+      verts1(num_vertices(g1) + 1);
+    typename Traits2::vertex_descriptor s = *vertices(g2).first;
+    {
+      typename Traits1::vertex_iterator v, v_end;
+      int i = 1;
+      for (boost::tie(v, v_end) = vertices(g1); v != v_end; ++v, ++i) {
+        typename Traits2::edge_descriptor e; bool z;
+        boost::tie(e, z) = add_edge(s, get(id1, *v) + 1, g2);
+        put(w, e, zero);
+        verts1[i] = *v;
+      }
+      typename Traits1::edge_iterator e, e_end;
+      for (boost::tie(e, e_end) = edges(g1); e != e_end; ++e) {
+        typename Traits2::edge_descriptor e2; bool z;
+        boost::tie(e2, z) = add_edge(get(id1, source(*e, g1)) + 1, 
+                                     get(id1, target(*e, g1)) + 1, g2);
+        put(w, e2, get(w1, *e));
+        if (is_undirected) {
+          boost::tie(e2, z) = add_edge(get(id1, target(*e, g1)) + 1, 
+                                       get(id1, source(*e, g1)) + 1, g2);
+          put(w, e2, get(w1, *e));
+        }
+      }
+    }
+    typename Traits2::vertex_iterator v, v_end, u, u_end;
+    typename Traits2::edge_iterator e, e_end;
+    shared_array_property_map<DT,VertexID2> h(num_vertices(g2), id2);
+
+    for (boost::tie(v, v_end) = vertices(g2); v != v_end; ++v)
+      put(d, *v, inf);
+
+    put(d, s, zero);
+    // Using the non-named parameter versions of bellman_ford and
+    // dijkstra for portability reasons.
+    dummy_property_map pred; bellman_visitor<> bvis;
+    if (bellman_ford_shortest_paths
+        (g2, num_vertices(g2), w, pred, d, combine, compare, bvis)) {
+      for (boost::tie(v, v_end) = vertices(g2); v != v_end; ++v)
+        put(h, *v, get(d, *v));
+      // Reweight the edges to remove negatives
+      for (boost::tie(e, e_end) = edges(g2); e != e_end; ++e) {
+        typename Traits2::vertex_descriptor a = source(*e, g2),
+          b = target(*e, g2);
+        put(w_hat, *e, combine(get(w, *e), (get(h, a) - get(h, b))));
+      }
+      for (boost::tie(u, u_end) = vertices(g2); u != u_end; ++u) {
+        dijkstra_visitor<> dvis;
+        dijkstra_shortest_paths
+          (g2, *u, pred, d, w_hat, id2, compare, combine, inf, zero,dvis);
+        for (boost::tie(v, v_end) = vertices(g2); v != v_end; ++v) {
+          if (*u != s && *v != s) {
+            typename Traits1::vertex_descriptor u1, v1;
+            u1 = verts1[get(id2, *u)]; v1 = verts1[get(id2, *v)];
+            D[get(id2, *u)-1][get(id2, *v)-1] = combine(get(d, *v), (get(h, *v) - get(h, *u)));
+          }
+        }
+      }
+      return true;
+    } else
+      return false;
+  }
+
+  template <class VertexAndEdgeListGraph, class DistanceMatrix,
+            class VertexID, class Weight, class DistanceZero>
+  bool
+  johnson_all_pairs_shortest_paths(VertexAndEdgeListGraph& g1, 
+               DistanceMatrix& D,
+               VertexID id1, Weight w1, DistanceZero zero)
+  {
+    typedef typename property_traits<Weight>::value_type WT;
+    return johnson_all_pairs_shortest_paths(g1, D, id1, w1, 
+                                            std::less<WT>(),
+                                            closed_plus<WT>(),
+                                            (std::numeric_limits<WT>::max)(),
+                                            zero);
+  }
+
+  namespace detail {
+
+    template <class VertexAndEdgeListGraph, class DistanceMatrix,
+              class P, class T, class R, class Weight, 
+              class VertexID>
+    bool
+    johnson_dispatch(VertexAndEdgeListGraph& g, 
+                     DistanceMatrix& D,
+                     const bgl_named_params<P, T, R>& params,
+                     Weight w, VertexID id)
+    {
+      typedef typename property_traits<Weight>::value_type WT;
+      
+      return johnson_all_pairs_shortest_paths
+        (g, D, id, w,
+        choose_param(get_param(params, distance_compare_t()), 
+          std::less<WT>()),
+        choose_param(get_param(params, distance_combine_t()), 
+          closed_plus<WT>()),
+        choose_param(get_param(params, distance_inf_t()), 
+          std::numeric_limits<WT>::max BOOST_PREVENT_MACRO_SUBSTITUTION()),
+         choose_param(get_param(params, distance_zero_t()), WT()) );
+    }
+
+  } // namespace detail
+
+  template <class VertexAndEdgeListGraph, class DistanceMatrix,
+            class P, class T, class R>
+  bool
+  johnson_all_pairs_shortest_paths
+    (VertexAndEdgeListGraph& g, 
+     DistanceMatrix& D,
+     const bgl_named_params<P, T, R>& params)
+  {
+    return detail::johnson_dispatch
+      (g, D, params,
+       choose_const_pmap(get_param(params, edge_weight), g, edge_weight),
+       choose_const_pmap(get_param(params, vertex_index), g, vertex_index)
+       );
+  }
+
+  template <class VertexAndEdgeListGraph, class DistanceMatrix>
+  bool
+  johnson_all_pairs_shortest_paths
+    (VertexAndEdgeListGraph& g, DistanceMatrix& D)
+  {
+    bgl_named_params<int,int> params(1);
+    return detail::johnson_dispatch
+      (g, D, params, get(edge_weight, g), get(vertex_index, g));
+  }
+
+} // namespace boost
+
+#endif // BOOST_GRAPH_JOHNSON_HPP
+
+