Add utility function to compute crc32 check sums

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/crc32.c b/tests/crc32.c
new file mode 100644
index 0000000..290f5cf
--- /dev/null
+++ b/tests/crc32.c
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include "config.h"
+#include "util.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+static const struct {
+	const char *str;
+	uint32_t result;
+} test_vectors[] = {
+	{ "", 0 },
+	{ "Hello, World!", 0xEC4AC3D0 },
+	{ "The quick brown fox jumps over the lazy dog", 0x414FA339 },
+};
+
+int main(void)
+{
+	uint32_t crc;
+	size_t i;
+
+	for (i = 0; i < sizeof(test_vectors) / sizeof(test_vectors[0]); ++i) {
+		crc = update_crc32(0, test_vectors[i].str,
+				   strlen(test_vectors[i].str));
+
+		if (crc != test_vectors[i].result) {
+			fprintf(stderr, "Case %zu failed: %08X != %08X\n", i,
+				crc, test_vectors[i].result);
+			return EXIT_FAILURE;
+		}
+	}
+
+	return EXIT_SUCCESS;
+}