xnu-792.21.3.tar.gz

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

/*
 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
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 * This file contains Original Code and/or Modifications of Original Code
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 * may not be used to create, or enable the creation or redistribution of,
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 * 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
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 * 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
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 */

#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_ */