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/*
* Copyright (c) 2000-2006 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
#include <stdint.h>
#include <libkern/_OSByteOrder.h>
/* Macros for swapping constant values in the preprocessing stage. */
#define OSSwapConstInt16(x) __DARWIN_OSSwapConstInt16(x)
#define OSSwapConstInt32(x) __DARWIN_OSSwapConstInt32(x)
#define OSSwapConstInt64(x) __DARWIN_OSSwapConstInt64(x)
#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(__GNUC__)
#if (defined(__i386__) || defined(__x86_64__))
#include <libkern/i386/OSByteOrder.h>
#elif defined (__arm__) || defined(__arm64__)
#include <libkern/arm/OSByteOrder.h>
#else
#include <libkern/machine/OSByteOrder.h>
#endif
#else /* ! __GNUC__ */
#include <libkern/machine/OSByteOrder.h>
#endif /* __GNUC__ */
#define OSSwapInt16(x) __DARWIN_OSSwapInt16(x)
#define OSSwapInt32(x) __DARWIN_OSSwapInt32(x)
#define OSSwapInt64(x) __DARWIN_OSSwapInt64(x)
enum {
OSUnknownByteOrder,
OSLittleEndian,
OSBigEndian
};
__DARWIN_OS_INLINE
int32_t
OSHostByteOrder(void)
{
#if defined(__LITTLE_ENDIAN__)
return OSLittleEndian;
#elif defined(__BIG_ENDIAN__)
return OSBigEndian;
#else
return OSUnknownByteOrder;
#endif
}
#define OSReadBigInt(x, y) OSReadBigInt32(x, y)
#define OSWriteBigInt(x, y, z) OSWriteBigInt32(x, y, z)
#define OSSwapBigToHostInt(x) OSSwapBigToHostInt32(x)
#define OSSwapHostToBigInt(x) OSSwapHostToBigInt32(x)
#define OSReadLittleInt(x, y) OSReadLittleInt32(x, y)
#define OSWriteLittleInt(x, y, z) OSWriteLittleInt32(x, y, z)
#define OSSwapHostToLittleInt(x) OSSwapHostToLittleInt32(x)
#define OSSwapLittleToHostInt(x) OSSwapLittleToHostInt32(x)
/* Functions for loading native endian values. */
__DARWIN_OS_INLINE
uint16_t
_OSReadInt16(
const volatile void * base,
uintptr_t byteOffset
)
{
return *(volatile uint16_t *)((uintptr_t)base + byteOffset);
}
__DARWIN_OS_INLINE
uint32_t
_OSReadInt32(
const volatile void * base,
uintptr_t byteOffset
)
{
return *(volatile uint32_t *)((uintptr_t)base + byteOffset);
}
__DARWIN_OS_INLINE
uint64_t
_OSReadInt64(
const volatile void * base,
uintptr_t byteOffset
)
{
return *(volatile uint64_t *)((uintptr_t)base + byteOffset);
}
/* Functions for storing native endian values. */
__DARWIN_OS_INLINE
void
_OSWriteInt16(
volatile void * base,
uintptr_t byteOffset,
uint16_t data
)
{
*(volatile uint16_t *)((uintptr_t)base + byteOffset) = data;
}
__DARWIN_OS_INLINE
void
_OSWriteInt32(
volatile void * base,
uintptr_t byteOffset,
uint32_t data
)
{
*(volatile uint32_t *)((uintptr_t)base + byteOffset) = data;
}
__DARWIN_OS_INLINE
void
_OSWriteInt64(
volatile void * base,
uintptr_t byteOffset,
uint64_t data
)
{
*(volatile uint64_t *)((uintptr_t)base + byteOffset) = data;
}
#if defined(__BIG_ENDIAN__)
/* Functions for loading big endian to host endianess. */
#define OSReadBigInt16(base, byteOffset) _OSReadInt16(base, byteOffset)
#define OSReadBigInt32(base, byteOffset) _OSReadInt32(base, byteOffset)
#define OSReadBigInt64(base, byteOffset) _OSReadInt64(base, byteOffset)
/* Functions for storing host endianess to big endian. */
#define OSWriteBigInt16(base, byteOffset, data) _OSWriteInt16(base, byteOffset, data)
#define OSWriteBigInt32(base, byteOffset, data) _OSWriteInt32(base, byteOffset, data)
#define OSWriteBigInt64(base, byteOffset, data) _OSWriteInt64(base, byteOffset, data)
/* Functions for loading little endian to host endianess. */
#define OSReadLittleInt16(base, byteOffset) OSReadSwapInt16(base, byteOffset)
#define OSReadLittleInt32(base, byteOffset) OSReadSwapInt32(base, byteOffset)
#define OSReadLittleInt64(base, byteOffset) OSReadSwapInt64(base, byteOffset)
/* Functions for storing host endianess to little endian. */
#define OSWriteLittleInt16(base, byteOffset, data) OSWriteSwapInt16(base, byteOffset, data)
#define OSWriteLittleInt32(base, byteOffset, data) OSWriteSwapInt32(base, byteOffset, data)
#define OSWriteLittleInt64(base, byteOffset, data) OSWriteSwapInt64(base, byteOffset, data)
/* Host endianess to big endian byte swapping macros for constants. */
#define OSSwapHostToBigConstInt16(x) ((uint16_t)(x))
#define OSSwapHostToBigConstInt32(x) ((uint32_t)(x))
#define OSSwapHostToBigConstInt64(x) ((uint64_t)(x))
/* Generic host endianess to big endian byte swapping functions. */
#define OSSwapHostToBigInt16(x) ((uint16_t)(x))
#define OSSwapHostToBigInt32(x) ((uint32_t)(x))
#define OSSwapHostToBigInt64(x) ((uint64_t)(x))
/* Host endianess to little endian byte swapping macros for constants. */
#define OSSwapHostToLittleConstInt16(x) OSSwapConstInt16(x)
#define OSSwapHostToLittleConstInt32(x) OSSwapConstInt32(x)
#define OSSwapHostToLittleConstInt64(x) OSSwapConstInt64(x)
/* Generic host endianess to little endian byte swapping functions. */
#define OSSwapHostToLittleInt16(x) OSSwapInt16(x)
#define OSSwapHostToLittleInt32(x) OSSwapInt32(x)
#define OSSwapHostToLittleInt64(x) OSSwapInt64(x)
/* Big endian to host endianess byte swapping macros for constants. */
#define OSSwapBigToHostConstInt16(x) ((uint16_t)(x))
#define OSSwapBigToHostConstInt32(x) ((uint32_t)(x))
#define OSSwapBigToHostConstInt64(x) ((uint64_t)(x))
/* Generic big endian to host endianess byte swapping functions. */
#define OSSwapBigToHostInt16(x) ((uint16_t)(x))
#define OSSwapBigToHostInt32(x) ((uint32_t)(x))
#define OSSwapBigToHostInt64(x) ((uint64_t)(x))
/* Little endian to host endianess byte swapping macros for constants. */
#define OSSwapLittleToHostConstInt16(x) OSSwapConstInt16(x)
#define OSSwapLittleToHostConstInt32(x) OSSwapConstInt32(x)
#define OSSwapLittleToHostConstInt64(x) OSSwapConstInt64(x)
/* Generic little endian to host endianess byte swapping functions. */
#define OSSwapLittleToHostInt16(x) OSSwapInt16(x)
#define OSSwapLittleToHostInt32(x) OSSwapInt32(x)
#define OSSwapLittleToHostInt64(x) OSSwapInt64(x)
#elif defined(__LITTLE_ENDIAN__)
/* Functions for loading big endian to host endianess. */
#define OSReadBigInt16(base, byteOffset) OSReadSwapInt16(base, byteOffset)
#define OSReadBigInt32(base, byteOffset) OSReadSwapInt32(base, byteOffset)
#define OSReadBigInt64(base, byteOffset) OSReadSwapInt64(base, byteOffset)
/* Functions for storing host endianess to big endian. */
#define OSWriteBigInt16(base, byteOffset, data) OSWriteSwapInt16(base, byteOffset, data)
#define OSWriteBigInt32(base, byteOffset, data) OSWriteSwapInt32(base, byteOffset, data)
#define OSWriteBigInt64(base, byteOffset, data) OSWriteSwapInt64(base, byteOffset, data)
/* Functions for loading little endian to host endianess. */
#define OSReadLittleInt16(base, byteOffset) _OSReadInt16(base, byteOffset)
#define OSReadLittleInt32(base, byteOffset) _OSReadInt32(base, byteOffset)
#define OSReadLittleInt64(base, byteOffset) _OSReadInt64(base, byteOffset)
/* Functions for storing host endianess to little endian. */
#define OSWriteLittleInt16(base, byteOffset, data) _OSWriteInt16(base, byteOffset, data)
#define OSWriteLittleInt32(base, byteOffset, data) _OSWriteInt32(base, byteOffset, data)
#define OSWriteLittleInt64(base, byteOffset, data) _OSWriteInt64(base, byteOffset, data)
/* Host endianess to big endian byte swapping macros for constants. */
#define OSSwapHostToBigConstInt16(x) OSSwapConstInt16(x)
#define OSSwapHostToBigConstInt32(x) OSSwapConstInt32(x)
#define OSSwapHostToBigConstInt64(x) OSSwapConstInt64(x)
/* Generic host endianess to big endian byte swapping functions. */
#define OSSwapHostToBigInt16(x) OSSwapInt16(x)
#define OSSwapHostToBigInt32(x) OSSwapInt32(x)
#define OSSwapHostToBigInt64(x) OSSwapInt64(x)
/* Host endianess to little endian byte swapping macros for constants. */
#define OSSwapHostToLittleConstInt16(x) ((uint16_t)(x))
#define OSSwapHostToLittleConstInt32(x) ((uint32_t)(x))
#define OSSwapHostToLittleConstInt64(x) ((uint64_t)(x))
/* Generic host endianess to little endian byte swapping functions. */
#define OSSwapHostToLittleInt16(x) ((uint16_t)(x))
#define OSSwapHostToLittleInt32(x) ((uint32_t)(x))
#define OSSwapHostToLittleInt64(x) ((uint64_t)(x))
/* Big endian to host endianess byte swapping macros for constants. */
#define OSSwapBigToHostConstInt16(x) OSSwapConstInt16(x)
#define OSSwapBigToHostConstInt32(x) OSSwapConstInt32(x)
#define OSSwapBigToHostConstInt64(x) OSSwapConstInt64(x)
/* Generic big endian to host endianess byte swapping functions. */
#define OSSwapBigToHostInt16(x) OSSwapInt16(x)
#define OSSwapBigToHostInt32(x) OSSwapInt32(x)
#define OSSwapBigToHostInt64(x) OSSwapInt64(x)
/* Little endian to host endianess byte swapping macros for constants. */
#define OSSwapLittleToHostConstInt16(x) ((uint16_t)(x))
#define OSSwapLittleToHostConstInt32(x) ((uint32_t)(x))
#define OSSwapLittleToHostConstInt64(x) ((uint64_t)(x))
/* Generic little endian to host endianess byte swapping functions. */
#define OSSwapLittleToHostInt16(x) ((uint16_t)(x))
#define OSSwapLittleToHostInt32(x) ((uint32_t)(x))
#define OSSwapLittleToHostInt64(x) ((uint64_t)(x))
#else
#error Unknown endianess.
#endif
#endif /* ! _OS_OSBYTEORDER_H */
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