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+/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program 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.
+
+ This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/*!
+ * \file
+ *
+ * \brief Endian dependent integer operations.
+ *
+ * \addtogroup wire
+ * @{
+ */
+
+#pragma once
+
+#if defined(__linux__) || defined(__gnu_hurd__) || \
+ (defined(__FreeBSD_kernel__) && defined(__GLIBC__))
+# include <endian.h>
+#elif defined(__FreeBSD__) || defined(__NetBSD__)
+# include <sys/endian.h>
+#elif defined(__OpenBSD__) || defined(__sun) || defined(__CYGWIN__)
+# include <endian.h>
+#elif defined(__APPLE__)
+# include <libkern/OSByteOrder.h>
+# define be16toh(x) OSSwapBigToHostInt16(x)
+# define be32toh(x) OSSwapBigToHostInt32(x)
+# define be64toh(x) OSSwapBigToHostInt64(x)
+# define htobe16(x) OSSwapHostToBigInt16(x)
+# define htobe32(x) OSSwapHostToBigInt32(x)
+# define htobe64(x) OSSwapHostToBigInt64(x)
+# define le16toh(x) OSSwapLittleToHostInt16(x)
+# define le32toh(x) OSSwapLittleToHostInt32(x)
+# define le64toh(x) OSSwapLittleToHostInt64(x)
+# define htole16(x) OSSwapHostToLittleInt16(x)
+# define htole32(x) OSSwapHostToLittleInt32(x)
+# define htole64(x) OSSwapHostToLittleInt64(x)
+#endif
+
+/*! @} */