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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2006-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard street, Cambridge, MA 02139 USA
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>
#include <stdio.h>
#include <unistd.h> /* unlink */
void custom_warning_handler (const char *reason, const char *file,
int line, int igraph_errno) {
printf("Warning: %s\n", reason);
}
int main(int argc, char **argv) {
igraph_t g;
igraph_error_handler_t* oldhandler;
igraph_warning_handler_t* oldwarnhandler;
int result;
FILE *ifile, *ofile;
/* GraphML */
ifile=fopen("test.gxl", "r");
if (ifile==0) {
return 10;
}
oldhandler=igraph_set_error_handler(igraph_error_handler_ignore);
oldwarnhandler=igraph_set_warning_handler(custom_warning_handler);
if ((result=igraph_read_graph_graphml(&g, ifile, 0))) {
// maybe it is simply disabled at compile-time
if (result == IGRAPH_UNIMPLEMENTED) return 77;
return 1;
}
igraph_set_error_handler(oldhandler);
fclose(ifile);
/* Write it back */
ofile=fopen("test2.gxl", "w");
/* If we can't create the test file, just skip the test */
if (ofile) {
if ((result=igraph_write_graph_graphml(&g, ofile, /*prefixattr=*/ 1))) {
return 1;
}
fclose(ofile);
unlink("test2.gxl");
}
printf("The directed graph:\n");
printf("Vertices: %li\n", (long int) igraph_vcount(&g));
printf("Edges: %li\n", (long int) igraph_ecount(&g));
printf("Directed: %i\n", (int) igraph_is_directed(&g));
igraph_write_graph_edgelist(&g, stdout);
igraph_destroy(&g);
/* The same with undirected graph */
ifile=fopen("test.gxl", "r");
if ((result=igraph_read_graph_graphml(&g, ifile, 0))) {
return 1;
}
fclose(ifile);
printf("The undirected graph:\n");
printf("Vertices: %li\n", (long int) igraph_vcount(&g));
printf("Edges: %li\n", (long int) igraph_ecount(&g));
printf("Directed: %i\n", (int) igraph_is_directed(&g));
igraph_write_graph_edgelist(&g, stdout);
igraph_destroy(&g);
igraph_set_warning_handler(oldwarnhandler);
/* There were sometimes problems with this file */
/* Only if called from R though, and only on random occasions, once in every
ten reads. Do testing here doesn't make much sense, but if we have the file
then let's do it anyway. */
ifile=fopen("graphml-hsa05010.xml", "r");
igraph_read_graph_graphml(&g, ifile, 0);
fclose(ifile);
igraph_destroy(&g);
/* Test a completely malformed GraphML file */
ifile=fopen("graphml-malformed.xml", "r");
igraph_set_error_handler(igraph_error_handler_ignore);
igraph_set_warning_handler(igraph_warning_handler_ignore);
result=igraph_read_graph_graphml(&g, ifile, 0);
if (result != IGRAPH_PARSEERROR) {
return 1;
}
fclose(ifile);
igraph_destroy(&g);
/* Restore the old error handler */
igraph_set_error_handler(igraph_error_handler_abort);
return 0;
}
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