/* Copyright (c) 1997-2020
   Ewgenij Gawrilow, Michael Joswig, and the polymake team
   Technische Universität Berlin, Germany
   https://polymake.org

   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any
   later version: http://www.gnu.org/licenses/gpl.txt.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
--------------------------------------------------------------------------------
*/

#include "polymake/client.h"
#include "polymake/graph/bipartite.h"
#include "polymake/Graph.h"

namespace polymake { namespace graph {

void bipartite_signature(BigObject p)
{
   const Graph<> G=p.give("ADJACENCY");
   const Int sign = bipartite_sign(G);
   p.take("BIPARTITE") << (sign >= 0);
   p.take("SIGNATURE") << sign;
}

Function4perl(&bipartite_signature, "bipartite_signature");

} }

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