Adding upstream version 1.12.0.upstream/1.12.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/openbsd-compat/endian_win32.c b/openbsd-compat/endian_win32.c
new file mode 100644
index 0000000..756c0cb
--- /dev/null
+++ b/openbsd-compat/endian_win32.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2020 Yubico AB. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "openbsd-compat.h"
+
+#if defined(_WIN32) && !defined(HAVE_ENDIAN_H)
+
+/*
+ * Hopefully, if the endianness differs from the end result, the compiler
+ * optimizes these functions with some type of bswap instruction. Or,
+ * otherwise, to just return the input value unmodified. GCC and clang
+ * both does these optimization at least. This should be preferred over
+ * relying on some BYTE_ORDER macro, which may or may not be defined.
+ */
+
+uint32_t
+htole32(uint32_t in)
+{
+	uint32_t	 out = 0;
+	uint8_t		*b = (uint8_t *)&out;
+
+	b[0] = (uint8_t)((in >> 0)  & 0xff);
+	b[1] = (uint8_t)((in >> 8)  & 0xff);
+	b[2] = (uint8_t)((in >> 16) & 0xff);
+	b[3] = (uint8_t)((in >> 24) & 0xff);
+
+	return (out);
+}
+
+uint64_t
+htole64(uint64_t in)
+{
+	uint64_t	 out = 0;
+	uint8_t		*b = (uint8_t *)&out;
+
+	b[0] = (uint8_t)((in >> 0)  & 0xff);
+	b[1] = (uint8_t)((in >> 8)  & 0xff);
+	b[2] = (uint8_t)((in >> 16) & 0xff);
+	b[3] = (uint8_t)((in >> 24) & 0xff);
+	b[4] = (uint8_t)((in >> 32) & 0xff);
+	b[5] = (uint8_t)((in >> 40) & 0xff);
+	b[6] = (uint8_t)((in >> 48) & 0xff);
+	b[7] = (uint8_t)((in >> 56) & 0xff);
+
+	return (out);
+}
+
+#endif /* WIN32 && !HAVE_ENDIAN_H */