Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
@@ -0,0 +1,60 @@
+/*
+   igraph library.
+   Copyright (C) 2022  The igraph development team <igraph@igraph.org>
+
+   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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <igraph.h>
+#include "test_utilities.h"
+
+void print_and_destroy(igraph_t *g) {
+    igraph_es_t eids;
+    igraph_vector_int_t edges;
+
+    igraph_es_all(&eids, IGRAPH_EDGEORDER_ID);
+    igraph_vector_int_init(&edges, 0);
+
+    printf("  row-wise order: ");
+    igraph_edges(g, eids, &edges, 0);
+    print_vector_int(&edges);
+
+    printf("  column-wise order: ");
+    igraph_edges(g, eids, &edges, 1);
+    print_vector_int(&edges);
+
+    igraph_destroy(g);
+    igraph_vector_int_destroy(&edges);
+}
+
+int main(void) {
+    igraph_t g;
+
+    printf("No edges:\n");
+    igraph_small(&g, 0, 1, -1);
+    print_and_destroy(&g);
+
+    printf("Directed graph with loops and multiple edges:\n");
+    igraph_small(&g, 6, IGRAPH_DIRECTED,
+            0,1, 0,2, 1,1, 1,3, 2,0, 2,3, 4,3, 4,3, -1);
+    print_and_destroy(&g);
+
+    printf("Undirected graph with loops and multiple edges:\n");
+    igraph_small(&g, 6, IGRAPH_UNDIRECTED,
+            0,1, 0,2, 1,1, 1,3, 2,0, 2,3, 4,3, 4,3, -1);
+    print_and_destroy(&g);
+
+    VERIFY_FINALLY_STACK();
+    return 0;
+}