Abdelrahman Said
85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/*
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igraph library.
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Copyright (C) 2010-2021 The igraph development team
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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#include <igraph.h>
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static void simplify_write_destroy(igraph_t *g, igraph_attribute_combination_t *comb) {
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igraph_simplify(g, /*remove_multiple=*/ true, /*remove_loops=*/ true, comb);
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igraph_write_graph_graphml(g, stdout, /*prefixattr=*/ true);
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igraph_attribute_combination_destroy(comb);
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igraph_destroy(g);
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}
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int main(void) {
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igraph_t g, g2;
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igraph_attribute_combination_t comb;
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/* Initialize the library. */
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igraph_setup();
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igraph_set_attribute_table(&igraph_cattribute_table);
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igraph_small(&g, 4, IGRAPH_DIRECTED,
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0, 1, 0, 1, 0, 1,
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1, 2, 2, 3,
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-1);
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SETEAS(&g, "color", 0, "green");
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SETEAS(&g, "color", 1, "red");
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SETEAS(&g, "color", 2, "blue");
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SETEAS(&g, "color", 3, "white");
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SETEAS(&g, "color", 4, "black");
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/* ****************************************************** */
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igraph_copy(&g2, &g);
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igraph_attribute_combination(&comb,
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"weight", IGRAPH_ATTRIBUTE_COMBINE_SUM,
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"color", IGRAPH_ATTRIBUTE_COMBINE_FIRST,
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"", IGRAPH_ATTRIBUTE_COMBINE_IGNORE,
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IGRAPH_NO_MORE_ATTRIBUTES);
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simplify_write_destroy(&g2, &comb);
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/* ****************************************************** */
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igraph_copy(&g2, &g);
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igraph_attribute_combination(&comb,
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"", IGRAPH_ATTRIBUTE_COMBINE_LAST,
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IGRAPH_NO_MORE_ATTRIBUTES);
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simplify_write_destroy(&g2, &comb);
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/* ****************************************************** */
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igraph_copy(&g2, &g);
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igraph_attribute_combination(&comb,
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"", IGRAPH_ATTRIBUTE_COMBINE_IGNORE,
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"color", IGRAPH_ATTRIBUTE_COMBINE_CONCAT,
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IGRAPH_NO_MORE_ATTRIBUTES);
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simplify_write_destroy(&g2, &comb);
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/* ****************************************************** */
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igraph_destroy(&g);
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return 0;
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}
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