+/*
+ * Copyright 2019 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 HEADER_INTERNAL_ENDIAN_H
+# define HEADER_INTERNAL_ENDIAN_H
+
+# 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