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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2006-2022 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>
#include <stdio.h>
#include <unistd.h> /* unlink */
#include "test_utilities.h"
void custom_warning_handler (const char *reason, const char *file,
int line) {
IGRAPH_UNUSED(file);
IGRAPH_UNUSED(line);
printf("Warning: %s\n", reason);
}
void dump_graph(const char* header, const igraph_t* g) {
fputs(header, stdout);
printf("Vertices: %" IGRAPH_PRId "\n", igraph_vcount(g));
printf("Edges: %" IGRAPH_PRId "\n", igraph_ecount(g));
printf("Directed: %i\n", igraph_is_directed(g) ? 1 : 0);
igraph_write_graph_edgelist(g, stdout);
}
void dump_vertex_attribute_bool(const char* name, const igraph_t* g) {
igraph_integer_t i, n = igraph_vcount(g);
printf("Vertex attribute '%s':", name);
for (i = 0; i < n; i++) {
printf(" %s", VAB(g, name, i) ? "true" : "false");
}
printf("\n");
}
void dump_vertex_attribute_numeric(const char* name, const igraph_t* g) {
igraph_integer_t i, n = igraph_vcount(g);
printf("Vertex attribute '%s':", name);
for (i = 0; i < n; i++) {
printf(" ");
igraph_real_printf_precise(VAN(g, name, i));
}
printf("\n");
}
void dump_vertex_attribute_string(const char* name, const igraph_t* g) {
igraph_integer_t i, n = igraph_vcount(g);
printf("Vertex attribute '%s':", name);
for (i = 0; i < n; i++) {
printf(" '%s'", VAS(g, name, i));
}
printf("\n");
}
int main(void) {
igraph_t g;
igraph_error_handler_t* oldhandler;
igraph_warning_handler_t* oldwarnhandler;
igraph_error_t result;
FILE *ifile, *ofile;
igraph_set_attribute_table(&igraph_cattribute_table);
/* GraphML */
ifile = fopen("test.graphml", "r");
IGRAPH_ASSERT(ifile != NULL);
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.graphml", "w");
/* If we can't create the test file, just skip the test */
if (ofile) {
if ((result = igraph_write_graph_graphml(&g, ofile, /*prefixattr=*/ true))) {
printf("Received unexpected return code: %d\n", result);
return 1;
}
fclose(ofile);
unlink("test2.graphml");
}
dump_graph("Directed graph:\n", &g);
dump_vertex_attribute_bool("gender", &g);
dump_vertex_attribute_string("color", &g);
igraph_destroy(&g);
/* The same with undirected graph */
ifile = fopen("test.graphml", "r");
IGRAPH_ASSERT(ifile != NULL);
if ((result = igraph_read_graph_graphml(&g, ifile, 0))) {
printf("Received unexpected return code: %d\n", result);
return 1;
}
fclose(ifile);
dump_graph("Undirected graph:\n", &g);
dump_vertex_attribute_bool("gender", &g);
dump_vertex_attribute_string("color", &g);
igraph_destroy(&g);
/* Test a GraphML file with default attributes */
ifile = fopen("graphml-default-attrs.xml", "r");
IGRAPH_ASSERT(ifile != NULL);
if ((result = igraph_read_graph_graphml(&g, ifile, 0))) {
printf("Received unexpected return code: %d\n", result);
return 1;
}
fclose(ifile);
dump_graph("Graph with default attributes:\n", &g);
dump_vertex_attribute_bool("type", &g);
dump_vertex_attribute_string("gender", &g);
dump_vertex_attribute_numeric("age", &g);
dump_vertex_attribute_bool("retired", &g);
igraph_destroy(&g);
/* Test a GraphML file with namespaces */
ifile = fopen("graphml-namespace.xml", "r");
IGRAPH_ASSERT(ifile != NULL);
if ((result = igraph_read_graph_graphml(&g, ifile, 0))) {
printf("Received unexpected return code: %d\n", result);
return 1;
}
fclose(ifile);
dump_graph("Graph with namespace:\n", &g);
igraph_destroy(&g);
/* Test a not-really-valid GraphML file as it has no namespace information */
ifile = fopen("graphml-lenient.xml", "r");
IGRAPH_ASSERT(ifile != NULL);
if ((result = igraph_read_graph_graphml(&g, ifile, 0))) {
printf("Received unexpected return code: %d\n", result);
return 1;
}
fclose(ifile);
dump_graph("Graph without namespace information:\n", &g);
igraph_destroy(&g);
/* Test a GraphML file with excess whitespace around attribute values
* (which we attempt to handle gracefully) */
ifile = fopen("graphml-whitespace.xml", "r");
IGRAPH_ASSERT(ifile != NULL);
if ((result = igraph_read_graph_graphml(&g, ifile, 0))) {
printf("Received unexpected return code: %d\n", result);
return 1;
}
fclose(ifile);
dump_graph("Graph with whitespace in attributes:\n", &g);
dump_vertex_attribute_bool("type", &g);
dump_vertex_attribute_string("name", &g);
dump_vertex_attribute_numeric("weight", &g);
igraph_destroy(&g);
/* Test a GraphML file from yEd -- we should be able to parse the nodes and
* edges */
igraph_set_warning_handler(igraph_warning_handler_ignore);
ifile = fopen("graphml-yed.xml", "r");
IGRAPH_ASSERT(ifile != NULL);
if ((result = igraph_read_graph_graphml(&g, ifile, 0))) {
printf("Received unexpected return code: %d\n", result);
return 1;
}
fclose(ifile);
dump_graph("Graph from yEd:\n", &g);
igraph_destroy(&g);
/* Restore the old error handler */
igraph_set_error_handler(igraph_error_handler_abort);
/* Restore the old warning handler */
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_ASSERT(ifile != NULL);
igraph_read_graph_graphml(&g, ifile, 0);
fclose(ifile);
igraph_destroy(&g);
VERIFY_FINALLY_STACK();
return 0;
}
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