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 +1,81 @@
+/*
+   igraph library.
+   Copyright (C) 2021  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 call_and_print(igraph_t *graph, igraph_int_t vertex, igraph_neimode_t mode) {
+    igraph_vector_int_t result;
+    igraph_vector_int_init(&result, 0);
+    IGRAPH_ASSERT(igraph_subcomponent(graph, &result, vertex, mode) == IGRAPH_SUCCESS);
+    igraph_vector_int_sort(&result);
+    igraph_vector_int_print(&result);
+    igraph_vector_int_destroy(&result);
+    printf("\n");
+}
+
+
+int main(void) {
+    igraph_t g_0, g_1, g_lm, g_lmu;
+    igraph_vector_int_t result;
+    igraph_vector_int_init(&result, 0);
+    igraph_int_t i;
+
+    igraph_small(&g_0, 0, 0, -1);
+    igraph_small(&g_1, 1, 0, -1);
+    igraph_small(&g_lm, 6, 1, 0,1, 0,2, 1,1, 1,3, 2,0, 2,0, 2,3, 3,4, 3,4, -1);
+    igraph_small(&g_lmu, 6, 0, 0,1, 0,2, 1,1, 1,3, 2,0, 2,0, 2,3, 3,4, 3,4, -1);
+
+    printf("No vertices, should give error for impossible starting vertex.\n");
+    CHECK_ERROR(igraph_subcomponent(&g_0, &result, 0, IGRAPH_ALL), IGRAPH_EINVVID);
+
+    printf("One vertex.\n");
+    call_and_print(&g_1, 0, IGRAPH_ALL);
+
+    printf("All vertices of a graph, IGRAPH_OUT:\n");
+    for (i = 0; i < 6; i++) {
+        call_and_print(&g_lm, i, IGRAPH_OUT);
+    }
+
+    printf("All vertices of a graph, IGRAPH_IN:\n");
+    for (i = 0; i < 6; i++) {
+        call_and_print(&g_lm, i, IGRAPH_IN);
+    }
+
+    printf("All vertices of a graph, IGRAPH_ALL:\n");
+    for (i = 0; i < 6; i++) {
+        call_and_print(&g_lm, i, IGRAPH_ALL);
+    }
+
+    printf("All vertices of a graph, undirected:\n");
+    for (i = 0; i < 6; i++) {
+        call_and_print(&g_lmu, i, IGRAPH_OUT);
+    }
+
+    printf("Check for invalid mode error handling.\n");
+    CHECK_ERROR(igraph_subcomponent(&g_1, &result, 0, (igraph_neimode_t) 100), IGRAPH_EINVMODE);
+
+    igraph_destroy(&g_0);
+    igraph_destroy(&g_1);
+    igraph_destroy(&g_lm);
+    igraph_destroy(&g_lmu);
+    igraph_vector_int_destroy(&result);
+
+    VERIFY_FINALLY_STACK();
+    return 0;
+}