1 files changed, 113 insertions, 0 deletions
diff --git a/tests/helpers/test_byteswap.c b/tests/helpers/test_byteswap.c
new file mode 100644
index 0000000..d8a7b2f
--- /dev/null
+++ b/tests/helpers/test_byteswap.c
@@ -0,0 +1,113 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This testing program makes sure the byteswap functions work
+ *
+ * Copyright (C) 2000 by Theodore Ts'o.
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ */
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <inttypes.h>
+
+#include "bitops.h"
+
+static uint16_t ary16[] = {
+	0x0001, 0x0100,
+	0x1234, 0x3412,
+	0xff00, 0x00ff,
+	0x4000, 0x0040,
+	0xfeff, 0xfffe,
+	0x0000, 0x0000
+	};
+
+static uint32_t ary32[] = {
+	0x00000001, 0x01000000,
+	0x80000000, 0x00000080,
+	0x12345678, 0x78563412,
+	0xffff0000, 0x0000ffff,
+	0x00ff0000, 0x0000ff00,
+	0xff000000, 0x000000ff,
+	0x00000000, 0x00000000
+	};
+
+static uint64_t ary64[] = {
+	0x0000000000000001, 0x0100000000000000,
+	0x8000000000000000, 0x0000000000000080,
+	0x1234567812345678, 0x7856341278563412,
+	0xffffffff00000000, 0x00000000ffffffff,
+	0x00ff000000000000, 0x000000000000ff00,
+	0xff00000000000000, 0x00000000000000ff,
+	0x0000000000000000, 0x0000000000000000
+	};
+
+int main(void)
+{
+	int	i;
+	int	errors = 0;
+
+	printf("Testing swab16\n");
+	i=0;
+	do {
+		printf("swab16(0x%04"PRIx16") = 0x%04"PRIx16"\n",
+				ary16[i], swab16(ary16[i]));
+		if (swab16(ary16[i]) != ary16[i+1]) {
+			printf("Error!!!   %04"PRIx16" != %04"PRIx16"\n",
+			       swab16(ary16[i]), ary16[i+1]);
+			errors++;
+		}
+		if (swab16(ary16[i+1]) != ary16[i]) {
+			printf("Error!!!   %04"PRIx16" != %04"PRIx16"\n",
+			       swab16(ary16[i+1]), ary16[i]);
+			errors++;
+		}
+		i += 2;
+	} while (ary16[i] != 0);
+
+	printf("Testing swab32\n");
+	i = 0;
+	do {
+		printf("swab32(0x%08"PRIx32") = 0x%08"PRIx32"\n",
+				ary32[i], swab32(ary32[i]));
+		if (swab32(ary32[i]) != ary32[i+1]) {
+			printf("Error!!!   %04"PRIx32" != %04"PRIx32"\n",
+				swab32(ary32[i]), ary32[i+1]);
+			errors++;
+		}
+		if (swab32(ary32[i+1]) != ary32[i]) {
+			printf("Error!!!   %04"PRIx32" != %04"PRIx32"\n",
+			       swab32(ary32[i+1]), ary32[i]);
+			errors++;
+		}
+		i += 2;
+	} while (ary32[i] != 0);
+
+	printf("Testing swab64\n");
+	i = 0;
+	do {
+		printf("swab64(0x%016"PRIx64") = 0x%016"PRIx64"\n",
+				ary64[i], swab64(ary64[i]));
+		if (swab64(ary64[i]) != ary64[i+1]) {
+			printf("Error!!!   %016"PRIx64" != %016"PRIx64"\n",
+				swab64(ary64[i]), ary64[i+1]);
+			errors++;
+		}
+		if (swab64(ary64[i+1]) != ary64[i]) {
+			printf("Error!!!   %016"PRIx64" != %016"PRIx64"\n",
+			       swab64(ary64[i+1]), ary64[i]);
+			errors++;
+		}
+		i += 2;
+	} while (ary64[i] != 0);
+
+	if (!errors)
+		printf("No errors found in the byteswap implementation\n");
+
+	return errors;
+}