xnu-1699.22.81.tar.gz

[apple/xnu.git] / bsd / sys / _endian.h

/*
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 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
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 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
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 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The 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,
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/*
 * Copyright (c) 1995 NeXT Computer, Inc. All rights reserved.
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
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/*
 * Copyright (c) 1987, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 *    notice, this list of conditions and the following disclaimer.
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 */

#ifndef _SYS__ENDIAN_H_
#define	_SYS__ENDIAN_H_

#include <sys/cdefs.h>

/*
 * Macros for network/external number representation conversion.
 */

#if defined(lint)

__BEGIN_DECLS
__uint16_t	ntohs(__uint16_t);
__uint16_t	htons(__uint16_t);
__uint32_t	ntohl(__uint32_t);
__uint32_t	htonl(__uint32_t);
__END_DECLS

#elif __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN

#define ntohl(x)        ((__uint32_t)(x))
#define ntohs(x)        ((__uint16_t)(x))
#define htonl(x)        ((__uint32_t)(x))
#define htons(x)        ((__uint16_t)(x))

#if     defined(KERNEL) || (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_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) || defined(_DARWIN_C_SOURCE)) */

#else	/* __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN */

#include <libkern/_OSByteOrder.h>

#define ntohs(x)	__DARWIN_OSSwapInt16(x)
#define htons(x)	__DARWIN_OSSwapInt16(x)

#define ntohl(x)	__DARWIN_OSSwapInt32(x)
#define htonl(x)	__DARWIN_OSSwapInt32(x)

#if	defined(KERNEL) || (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
#define	NTOHL(x)	(x) = ntohl((__uint32_t)x)
#define	NTOHS(x)	(x) = ntohs((__uint16_t)x)
#define	HTONL(x)	(x) = htonl((__uint32_t)x)
#define	HTONS(x)	(x) = htons((__uint16_t)x)
#endif /* defined(KERNEL) || (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */
#endif /* __DARWIN_BYTE_ORDER */
#endif /* !_SYS__ENDIAN_H_ */