53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
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//=======================================================================
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// Copyright 2013 University of Warsaw.
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// Authors: Piotr Wygocki
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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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#ifndef BOOST_GRAPH_FIND_FLOW_COST_HPP
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#define BOOST_GRAPH_FIND_FLOW_COST_HPP
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#include <boost/graph/iteration_macros.hpp>
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namespace boost {
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template<class Graph, class Capacity, class ResidualCapacity, class Weight>
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typename property_traits<Weight>::value_type
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find_flow_cost(const Graph & g, Capacity capacity, ResidualCapacity residual_capacity, Weight weight) {
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typedef typename property_traits<Weight>::value_type Cost;
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Cost cost = 0;
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BGL_FORALL_EDGES_T(e, g, Graph) {
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if(get(capacity, e) > Cost(0)) {
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cost += (get(capacity, e) - get(residual_capacity, e)) * get(weight, e);
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}
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}
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return cost;
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}
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template <class Graph, class P, class T, class R>
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typename detail::edge_weight_value<Graph, P, T, R>::type
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find_flow_cost(const Graph & g,
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const bgl_named_params<P, T, R>& params) {
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return find_flow_cost(g,
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choose_const_pmap(get_param(params, edge_capacity), g, edge_capacity),
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choose_const_pmap(get_param(params, edge_residual_capacity),
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g, edge_residual_capacity),
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choose_const_pmap(get_param(params, edge_weight), g, edge_weight));
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}
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template <class Graph>
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typename property_traits<typename property_map < Graph, edge_capacity_t >::type>::value_type
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find_flow_cost(const Graph &g) {
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bgl_named_params<int, buffer_param_t> params(0);
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return find_flow_cost(g, params);
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}
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} //boost
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#endif /* BOOST_GRAPH_FIND_FLOW_COST_HPP */
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