/* -*- 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; }