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authorBobTheBob <32057864+BobTheBob9@users.noreply.github.com>2021-12-19 03:13:28 +0000
committerBobTheBob <32057864+BobTheBob9@users.noreply.github.com>2021-12-19 03:13:28 +0000
commit75b9583a6b66c09596f4c0a25188ba4d99ca34da (patch)
tree4eef5ac3c28faa511d08be350f6bc028d5ebc290 /NorthstarDedicatedTest/include/internal/endian.h
parent682a00eaac30139929b1bb179ae7f4aa1a038572 (diff)
downloadNorthstarLauncher-75b9583a6b66c09596f4c0a25188ba4d99ca34da.tar.gz
NorthstarLauncher-75b9583a6b66c09596f4c0a25188ba4d99ca34da.zip
openssl support
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+/*
+ * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#ifndef OSSL_INTERNAL_ENDIAN_H
+# define OSSL_INTERNAL_ENDIAN_H
+# pragma once
+
+/*
+ * IS_LITTLE_ENDIAN and IS_BIG_ENDIAN can be used to detect the endiannes
+ * at compile time. To use it, DECLARE_IS_ENDIAN must be used to declare
+ * a variable.
+ *
+ * L_ENDIAN and B_ENDIAN can be used at preprocessor time. They can be set
+ * in the configarion using the lib_cppflags variable. If neither is
+ * set, it will fall back to code works with either endianness.
+ */
+
+# if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__)
+# define DECLARE_IS_ENDIAN const int ossl_is_little_endian = __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+# define IS_LITTLE_ENDIAN (ossl_is_little_endian)
+# define IS_BIG_ENDIAN (!ossl_is_little_endian)
+# if defined(L_ENDIAN) && (__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__)
+# error "L_ENDIAN defined on a big endian machine"
+# endif
+# if defined(B_ENDIAN) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+# error "B_ENDIAN defined on a little endian machine"
+# endif
+# if !defined(L_ENDIAN) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+# define L_ENDIAN
+# endif
+# if !defined(B_ENDIAN) && (__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__)
+# define B_ENDIAN
+# endif
+# else
+# define DECLARE_IS_ENDIAN \
+ const union { \
+ long one; \
+ char little; \
+ } ossl_is_endian = { 1 }
+
+# define IS_LITTLE_ENDIAN (ossl_is_endian.little != 0)
+# define IS_BIG_ENDIAN (ossl_is_endian.little == 0)
+# endif
+
+#endif