1 files changed, 122 insertions, 0 deletions
diff --git a/tests/lib/test_skiplist.c b/tests/lib/test_skiplist.c
new file mode 100644
index 00000000..6af7ac52
--- /dev/null
+++ b/tests/lib/test_skiplist.c
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2021, LabN Consulting, L.L.C
+ */
+
+#include <zebra.h>
+#include <skiplist.h>
+
+static void sl_debug(struct skiplist *l)
+{
+	int i;
+
+	if (!l)
+		return;
+
+	printf("Skiplist %p has max level %d\n", l, l->level);
+	for (i = l->level; i >= 0; --i)
+		printf("  @%d: %d\n", i, l->level_stats[i]);
+}
+
+static void *scramble(int i)
+{
+	uintptr_t result;
+
+	result = (uintptr_t)(i & 0xff) << 24;
+	result |= (uintptr_t)i >> 8;
+
+	return (void *)result;
+}
+#define sampleSize 65536
+static int sl_test(void)
+{
+	struct skiplist *l;
+	register int i, k;
+	void *keys[sampleSize];
+	void *v = NULL;
+	int errors = 0;
+
+	l = skiplist_new(SKIPLIST_FLAG_ALLOW_DUPLICATES, NULL, NULL);
+
+	printf("%s: skiplist_new returned %p\n", __func__, l);
+
+	for (i = 0; i < 4; i++) {
+
+		for (k = 0; k < sampleSize; k++) {
+			if (!(k % 10000))
+				printf("%s: (%d:%d)\n", __func__, i, k);
+			/* keys[k] = (void *)random(); */
+			keys[k] = scramble(k);
+			if (skiplist_insert(l, keys[k], keys[k])) {
+				++errors;
+				printf("error in insert #%d,#%d\n", i, k);
+			}
+		}
+
+		printf("%s: inserts done\n", __func__);
+		sl_debug(l);
+
+		for (k = 0; k < sampleSize; k++) {
+
+			if (!(k % 10000))
+				printf("[%d:%d]\n", i, k);
+			/* keys[k] = (void *)random(); */
+			if (skiplist_search(l, keys[k], &v)) {
+				++errors;
+				printf("error in search #%d,#%d\n", i, k);
+			}
+
+			if (v != keys[k]) {
+				++errors;
+				printf("search returned wrong value\n");
+			}
+		}
+		printf("%s: searches done\n", __func__);
+
+
+		for (k = 0; k < sampleSize; k++) {
+
+			if (!(k % 10000))
+				printf("<%d:%d>\n", i, k);
+			/* keys[k] = (void *)random(); */
+			if (skiplist_delete(l, keys[k], keys[k])) {
+				++errors;
+				printf("error in delete\n");
+			}
+			keys[k] = scramble(k ^ 0xf0f0f0f0);
+			if (skiplist_insert(l, keys[k], keys[k])) {
+				++errors;
+				printf("error in insert #%d,#%d\n", i, k);
+			}
+		}
+
+		printf("%s: del+inserts done\n", __func__);
+		sl_debug(l);
+
+		for (k = 0; k < sampleSize; k++) {
+
+			if (!(k % 10000))
+				printf("{%d:%d}\n", i, k);
+			/* keys[k] = (void *)random(); */
+			if (skiplist_delete_first(l)) {
+				++errors;
+				printf("error in delete_first\n");
+			}
+		}
+	}
+
+	sl_debug(l);
+
+	skiplist_free(l);
+
+	return errors;
+}
+
+int main(int argc, char **argv)
+{
+	int errors = sl_test();
+
+	if (errors)
+		return 1;
+	return 0;
+}