--- /dev/null
+/*
+ * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ *
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+/*
+ * Copyright (c) 1995 NeXT Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ *
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 1987, 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _SYS__ENDIAN_H_
+#define _SYS__ENDIAN_H_
+
+#include <sys/cdefs.h>
+
+/*
+ * Macros for network/external number representation conversion.
+ */
+#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN && !defined(lint)
+#define ntohl(x) (x)
+#define ntohs(x) (x)
+#define htonl(x) (x)
+#define htons(x) (x)
+
+#if defined(KERNEL) || !defined(_POSIX_C_SOURCE)
+#define NTOHL(x) (x)
+#define NTOHS(x) (x)
+#define HTONL(x) (x)
+#define HTONS(x) (x)
+#endif /* defined(KERNEL) || !defined(_POSIX_C_SOURCE) */
+
+#else
+
+#if !defined(__ASSEMBLER__)
+
+#include <stdint.h>
+#include <machine/byte_order.h>
+
+__BEGIN_DECLS
+uint16_t ntohs(uint16_t);
+uint16_t htons(uint16_t);
+uint32_t ntohl(uint32_t);
+uint32_t htonl(uint32_t);
+__END_DECLS
+#endif /* !defined(__ASSEMBLER__) */
+
+#define ntohs(x) NXSwapBigShortToHost(x)
+#define htons(x) NXSwapHostShortToBig(x)
+
+#if defined(__LP64__)
+#define ntohl(x) NXSwapBigIntToHost(x)
+#define htonl(x) NXSwapHostIntToBig(x)
+#else
+#define ntohl(x) NXSwapBigLongToHost(x)
+#define htonl(x) NXSwapHostLongToBig(x)
+#endif /* defined(__LP64__) */
+
+#if defined(KERNEL) || !defined(_POSIX_C_SOURCE)
+#define NTOHL(x) (x) = ntohl((u_long)x)
+#define NTOHS(x) (x) = ntohs((u_short)x)
+#define HTONL(x) (x) = htonl((u_long)x)
+#define HTONS(x) (x) = htons((u_short)x)
+#endif /* defined(KERNEL) || !defined(_POSIX_C_SOURCE) */
+#endif /* __DARWIN_BYTE_ORDER != __DARWIN_BIG_ENDIAN || defined(lint) */
+#endif /* !_SYS__ENDIAN_H_ */