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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2010-2021 The igraph development team
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
*/
#include <igraph.h>
static void simplify_write_destroy(igraph_t *g, igraph_attribute_combination_t *comb) {
igraph_simplify(g, /*multiple=*/ true, /*loops=*/ true, comb);
igraph_write_graph_graphml(g, stdout, /*prefixattr=*/ true);
igraph_attribute_combination_destroy(comb);
igraph_destroy(g);
}
int main(void) {
igraph_t g, g2;
igraph_attribute_combination_t comb;
igraph_set_attribute_table(&igraph_cattribute_table);
igraph_small(&g, 4, IGRAPH_DIRECTED,
0, 1, 0, 1, 0, 1,
1, 2, 2, 3,
-1);
SETEAS(&g, "color", 0, "green");
SETEAS(&g, "color", 1, "red");
SETEAS(&g, "color", 2, "blue");
SETEAS(&g, "color", 3, "white");
SETEAS(&g, "color", 4, "black");
/* ****************************************************** */
igraph_copy(&g2, &g);
igraph_attribute_combination(&comb,
"weight", IGRAPH_ATTRIBUTE_COMBINE_SUM,
"color", IGRAPH_ATTRIBUTE_COMBINE_FIRST,
"", IGRAPH_ATTRIBUTE_COMBINE_IGNORE,
IGRAPH_NO_MORE_ATTRIBUTES);
simplify_write_destroy(&g2, &comb);
/* ****************************************************** */
igraph_copy(&g2, &g);
igraph_attribute_combination(&comb,
"", IGRAPH_ATTRIBUTE_COMBINE_LAST,
IGRAPH_NO_MORE_ATTRIBUTES);
simplify_write_destroy(&g2, &comb);
/* ****************************************************** */
igraph_copy(&g2, &g);
igraph_attribute_combination(&comb,
"", IGRAPH_ATTRIBUTE_COMBINE_IGNORE,
"color", IGRAPH_ATTRIBUTE_COMBINE_CONCAT,
IGRAPH_NO_MORE_ATTRIBUTES);
simplify_write_destroy(&g2, &comb);
/* ****************************************************** */
igraph_destroy(&g);
return 0;
}
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