1 files changed, 121 insertions, 0 deletions
diff --git a/grub-core/tests/bswap_test.c b/grub-core/tests/bswap_test.c
new file mode 100644
index 0000000..4eb3a98
--- /dev/null
+++ b/grub-core/tests/bswap_test.c
@@ -0,0 +1,121 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2015 Free Software Foundation, Inc.
+ *
+ *  GRUB 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/test.h>
+#include <grub/dl.h>
+#include <grub/misc.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_uint64_t vectors[] = {
+  0xffffffffffffffffULL, 1, 2, 0, 0x0102030405060708ULL
+};
+
+static void
+test16 (grub_uint16_t a)
+{
+  grub_uint16_t b, c;
+  grub_uint8_t *ap, *bp;
+  int i;
+  b = grub_swap_bytes16 (a);
+  c = grub_swap_bytes16 (b);
+  grub_test_assert (a == c, "bswap not idempotent: 0x%llx, 0x%llx, 0x%llx",
+		    (long long) a, (long long) b, (long long) c);
+  ap = (grub_uint8_t *) &a;
+  bp = (grub_uint8_t *) &b;
+  for (i = 0; i < 2; i++)
+    {
+      grub_test_assert (ap[i] == bp[1 - i],
+			"bswap bytes wrong: 0x%llx, 0x%llx",
+			(long long) a, (long long) b);
+    }
+}
+
+static void
+test32 (grub_uint32_t a)
+{
+  grub_uint32_t b, c;
+  grub_uint8_t *ap, *bp;
+  int i;
+  b = grub_swap_bytes32 (a);
+  c = grub_swap_bytes32 (b);
+  grub_test_assert (a == c, "bswap not idempotent: 0x%llx, 0x%llx, 0x%llx",
+		    (long long) a, (long long) b, (long long) c);
+  ap = (grub_uint8_t *) &a;
+  bp = (grub_uint8_t *) &b;
+  for (i = 0; i < 4; i++)
+    {
+      grub_test_assert (ap[i] == bp[3 - i],
+			"bswap bytes wrong: 0x%llx, 0x%llx",
+			(long long) a, (long long) b);
+    }
+}
+
+static void
+test64 (grub_uint64_t a)
+{
+  grub_uint64_t b, c;
+  grub_uint8_t *ap, *bp;
+  int i;
+  b = grub_swap_bytes64 (a);
+  c = grub_swap_bytes64 (b);
+  grub_test_assert (a == c, "bswap not idempotent: 0x%llx, 0x%llx, 0x%llx",
+		    (long long) a, (long long) b, (long long) c);
+  ap = (grub_uint8_t *) &a;
+  bp = (grub_uint8_t *) &b;
+  for (i = 0; i < 4; i++)
+    {
+      grub_test_assert (ap[i] == bp[7 - i],
+			"bswap bytes wrong: 0x%llx, 0x%llx",
+			(long long) a, (long long) b);
+    }
+}
+
+static void
+test_all(grub_uint64_t a)
+{
+  test64 (a);
+  test32 (a);
+  test16 (a);
+}
+
+static void
+bswap_test (void)
+{
+  grub_uint64_t a = 404, b = 7;
+  grub_size_t i;
+
+  for (i = 0; i < ARRAY_SIZE (vectors); i++)
+    {
+      test_all (vectors[i]);
+    }
+  for (i = 0; i < 40000; i++)
+    {
+      a = 17 * a + 13 * b;
+      b = 23 * a + 29 * b;
+      if (b == 0)
+	b = 1;
+      if (a == 0)
+	a = 1;
+      test_all (a);
+      test_all (b);
+    }
+}
+
+/* Register example_test method as a functional test.  */
+GRUB_FUNCTIONAL_TEST (bswap_test, bswap_test);