mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-23 13:22:02 +03:00
84 lines
3.2 KiB
C++
84 lines
3.2 KiB
C++
//=======================================================================
|
|
// Copyright 2002 Indiana University.
|
|
// 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_CREATE_CONDENSATION_GRAPH_HPP
|
|
#define BOOST_CREATE_CONDENSATION_GRAPH_HPP
|
|
|
|
#include <boost/graph/graph_traits.hpp>
|
|
#include <boost/property_map/property_map.hpp>
|
|
|
|
namespace boost {
|
|
|
|
template <typename Graph, typename ComponentLists,
|
|
typename ComponentNumberMap,
|
|
typename CondensationGraph, typename EdgeMultiplicityMap>
|
|
void create_condensation_graph(const Graph& g,
|
|
const ComponentLists& components,
|
|
ComponentNumberMap component_number,
|
|
CondensationGraph& cg,
|
|
EdgeMultiplicityMap edge_mult_map)
|
|
{
|
|
typedef typename graph_traits<Graph>::vertex_descriptor vertex;
|
|
typedef typename graph_traits<Graph>::vertices_size_type size_type;
|
|
typedef typename graph_traits<CondensationGraph>::vertex_descriptor
|
|
cg_vertex;
|
|
std::vector<cg_vertex> to_cg_vertex(components.size());
|
|
for (size_type s = 0; s < components.size(); ++s)
|
|
to_cg_vertex[s] = add_vertex(cg);
|
|
|
|
for (size_type si = 0; si < components.size(); ++si) {
|
|
cg_vertex s = to_cg_vertex[si];
|
|
std::vector<cg_vertex> adj;
|
|
for (size_type i = 0; i < components[si].size(); ++i) {
|
|
vertex u = components[s][i];
|
|
typename graph_traits<Graph>::adjacency_iterator v, v_end;
|
|
for (boost::tie(v, v_end) = adjacent_vertices(u, g); v != v_end; ++v) {
|
|
cg_vertex t = to_cg_vertex[component_number[*v]];
|
|
if (s != t) // Avoid loops in the condensation graph
|
|
adj.push_back(t);
|
|
}
|
|
}
|
|
std::sort(adj.begin(), adj.end());
|
|
if (! adj.empty()) {
|
|
size_type i = 0;
|
|
cg_vertex t = adj[i];
|
|
typename graph_traits<CondensationGraph>::edge_descriptor e;
|
|
bool inserted;
|
|
boost::tie(e, inserted) = add_edge(s, t, cg);
|
|
put(edge_mult_map, e, 1);
|
|
++i;
|
|
while (i < adj.size()) {
|
|
if (adj[i] == t)
|
|
put(edge_mult_map, e, get(edge_mult_map, e) + 1);
|
|
else {
|
|
t = adj[i];
|
|
boost::tie(e, inserted) = add_edge(s, t, cg);
|
|
put(edge_mult_map, e, 1);
|
|
}
|
|
++i;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Graph, typename ComponentLists,
|
|
typename ComponentNumberMap, typename CondensationGraph>
|
|
void create_condensation_graph(const Graph& g,
|
|
const ComponentLists& components,
|
|
ComponentNumberMap component_number,
|
|
CondensationGraph& cg)
|
|
{
|
|
create_condensation_graph(g, components, component_number, cg,
|
|
dummy_property_map());
|
|
}
|
|
|
|
} // namespace boost
|
|
|
|
#endif // BOOST_CREATE_CONDENSATION_GRAPH_HPP
|