df1d52790c
Handle degenerate case where input graph contains no edges.
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
//=======================================================================
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// Copyright 2017 Felix Salfelder
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See 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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#include <boost/graph/minimum_degree_ordering.hpp>
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#include <boost/graph/adjacency_list.hpp>
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#include <boost/property_map/property_map.hpp>
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#include <boost/test/minimal.hpp>
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#include <boost/typeof/typeof.hpp>
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#include <vector>
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#include <map>
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typedef boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS> G;
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int test_main(int argc, char** argv)
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{
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size_t n = 10;
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G g(n);
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std::vector<int> inverse_perm(n, 0);
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std::vector<int> supernode_sizes(n, 1);
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BOOST_AUTO(id, boost::get(boost::vertex_index, g));
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std::vector<int> degree(n, 0);
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std::map<int,int> io;
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std::map<int,int> o;
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boost::minimum_degree_ordering(
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g
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, boost::make_iterator_property_map(degree.begin(), id, degree[0])
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, boost::make_assoc_property_map(io)
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, boost::make_assoc_property_map(o)
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, boost::make_iterator_property_map(
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supernode_sizes.begin()
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, id
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, supernode_sizes[0]
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)
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, 0
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, id
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);
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for (int k = 0; k < n; ++k)
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{
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BOOST_CHECK(o[io[k]] == k);
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}
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return 0;
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}
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