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76a2110b47
Introduce <machine/_endian.h> to let target based customization of <machine/endian.h> via * _LITTLE_ENDIAN, * _BIG_ENDIAN, * _PDP_ENDIAN, and * _BYTE_ORDER. defines. Add definitions expected by FreeBSD to <machine/endian.h> like * _QUAD_HIGHWORD, * _QUAD_LOWWORD, * __bswap16(), * __bswap32(), * __bswap64(), * __htonl(), * __htons(), * __ntohl(), and * __ntohs(). Also, if __BSD_VISIBLE * LITTLE_ENDIAN, * BIG_ENDIAN, * PDP_ENDIAN, and * BYTE_ORDER. Targets that define __machine_host_to_from_network_defined in <machine/_endian.h> must provide their own implementation of * __htonl(), * __htons(), * __ntohl(), and * __ntohs(), otherwise a default implementation is provided by <machine/endian.h>. In case of GCC defines to builtins are used. Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/* asm/byteorder.h
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Copyright 1996, 1998, 2001, 2006, 2009, 2011, 2012 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _I386_BYTEORDER_H
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#define _I386_BYTEORDER_H
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#include <stdint.h>
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#include <machine/endian.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef __LITTLE_ENDIAN_BITFIELD
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#define __LITTLE_ENDIAN_BITFIELD
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#endif
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extern uint32_t ntohl(uint32_t);
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extern uint16_t ntohs(uint16_t);
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extern uint32_t htonl(uint32_t);
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extern uint16_t htons(uint16_t);
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#define __constant_ntohl(x) \
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((uint32_t)((((uint32_t)(x) & 0x000000ffU) << 24) | \
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(((uint32_t)(x) & 0x0000ff00U) << 8) | \
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(((uint32_t)(x) & 0x00ff0000U) >> 8) | \
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(((uint32_t)(x) & 0xff000000U) >> 24)))
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#define __constant_ntohs(x) \
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((uint16_t)((((uint16_t)(x) & 0x00ff) << 8) | \
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(((uint16_t)(x) & 0xff00) >> 8))) \
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#define __constant_htonl(x) __constant_ntohl(x)
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#define __constant_htons(x) __constant_ntohs(x)
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#if defined (__OPTIMIZE__) && !defined (__NO_INLINE__)
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# define ntohl(x) \
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(__builtin_constant_p((long)(x)) ? \
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__constant_ntohl((x)) : \
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__ntohl((x)))
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# define ntohs(x) \
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(__builtin_constant_p((short)(x)) ? \
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__constant_ntohs((x)) : \
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__ntohs((x)))
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# define htonl(x) \
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(__builtin_constant_p((long)(x)) ? \
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__constant_htonl((x)) : \
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__htonl((x)))
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# define htons(x) \
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(__builtin_constant_p((short)(x)) ? \
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__constant_htons((x)) : \
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__htons((x)))
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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