/*
  Heuristic graph coloring algorithms.
  Copyright (C) 2017 Szabolcs Horvat <szhorvat@gmail.com>

  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 of the License, or
  (at your option) any later version.

  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.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  02110-1301 USA
*/

#ifndef IGRAPH_COLORING_H
#define IGRAPH_COLORING_H

#include "igraph_decls.h"
#include "igraph_datatype.h"

__BEGIN_DECLS

/**
 * \typedef igraph_coloring_greedy_t
 * \brief Ordering heuristics for greedy graph coloring.
 *
 * Ordering heuristics for \ref igraph_vertex_coloring_greedy().
 *
 * \enumval IGRAPH_COLORING_GREEDY_COLORED_NEIGHBORS  Choose vertex with largest number of already colored neighbors.
 *
 */
typedef enum {
    IGRAPH_COLORING_GREEDY_COLORED_NEIGHBORS = 0
} igraph_coloring_greedy_t;

IGRAPH_EXPORT int igraph_vertex_coloring_greedy(const igraph_t *graph, igraph_vector_int_t *colors, igraph_coloring_greedy_t heuristic);

__END_DECLS

#endif /* IGRAPH_COLORING_H */