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/*
* Copyright (c) 2006 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.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef _OS__OSBYTEORDER_H
#define _OS__OSBYTEORDER_H
/*
* This header is normally included from <libkern/OSByteOrder.h>. However,
* <sys/_endian.h> also includes this in the case of little-endian
* architectures, so that we can map OSByteOrder routines to the hton* and ntoh*
* macros. This results in the asymmetry below; we only include
* <libkern/arch/_OSByteOrder.h> for little-endian architectures.
*/
#include <sys/_types.h>
/* Macros for swapping constant values in the preprocessing stage. */
#define __DARWIN_OSSwapConstInt16(x) \
((__uint16_t)((((__uint16_t)(x) & 0xff00U) >> 8) | \
(((__uint16_t)(x) & 0x00ffU) << 8)))
#define __DARWIN_OSSwapConstInt32(x) \
((__uint32_t)((((__uint32_t)(x) & 0xff000000U) >> 24) | \
(((__uint32_t)(x) & 0x00ff0000U) >> 8) | \
(((__uint32_t)(x) & 0x0000ff00U) << 8) | \
(((__uint32_t)(x) & 0x000000ffU) << 24)))
#define __DARWIN_OSSwapConstInt64(x) \
((__uint64_t)((((__uint64_t)(x) & 0xff00000000000000ULL) >> 56) | \
(((__uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \
(((__uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \
(((__uint64_t)(x) & 0x000000ff00000000ULL) >> 8) | \
(((__uint64_t)(x) & 0x00000000ff000000ULL) << 8) | \
(((__uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \
(((__uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \
(((__uint64_t)(x) & 0x00000000000000ffULL) << 56)))
#if defined(__GNUC__)
#if !defined(__DARWIN_OS_INLINE)
# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
# define __DARWIN_OS_INLINE static inline
# elif defined(__MWERKS__) || defined(__cplusplus)
# define __DARWIN_OS_INLINE static inline
# else
# define __DARWIN_OS_INLINE static __inline__
# endif
#endif
#if defined(__i386__) || defined(__x86_64__)
#include <libkern/i386/_OSByteOrder.h>
#endif
#if defined (__arm__) || defined(__arm64__)
#include <libkern/arm/OSByteOrder.h>
#endif
#define __DARWIN_OSSwapInt16(x) \
((__uint16_t)(__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt16(x) : _OSSwapInt16(x)))
#define __DARWIN_OSSwapInt32(x) \
(__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt32(x) : _OSSwapInt32(x))
#define __DARWIN_OSSwapInt64(x) \
(__builtin_constant_p(x) ? __DARWIN_OSSwapConstInt64(x) : _OSSwapInt64(x))
#else /* ! __GNUC__ */
#if defined(__i386__) || defined(__x86_64__)
__DARWIN_OS_INLINE
uint16_t
_OSSwapInt16(
uint16_t data
)
{
return __DARWIN_OSSwapConstInt16(data);
}
__DARWIN_OS_INLINE
uint32_t
_OSSwapInt32(
uint32_t data
)
{
return __DARWIN_OSSwapConstInt32(data);
}
__DARWIN_OS_INLINE
uint64_t
_OSSwapInt64(
uint64_t data
)
{
return __DARWIN_OSSwapConstInt64(data);
}
#endif
#define __DARWIN_OSSwapInt16(x) _OSSwapInt16(x)
#define __DARWIN_OSSwapInt32(x) _OSSwapInt32(x)
#define __DARWIN_OSSwapInt64(x) _OSSwapInt64(x)
#endif /* __GNUC__ */
#endif /* ! _OS__OSBYTEORDER_H */
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