95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/* asm/byteorder.h
|
|
|
|
Copyright 1996, 1998, 2001, 2006, 2009 Red Hat, Inc.
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
#ifndef _I386_BYTEORDER_H
|
|
#define _I386_BYTEORDER_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#ifndef __LITTLE_ENDIAN
|
|
#define __LITTLE_ENDIAN 1234
|
|
#endif
|
|
|
|
#ifndef __LITTLE_ENDIAN_BITFIELD
|
|
#define __LITTLE_ENDIAN_BITFIELD
|
|
#endif
|
|
|
|
extern uint32_t ntohl(uint32_t);
|
|
extern uint16_t ntohs(uint16_t);
|
|
extern uint32_t htonl(uint32_t);
|
|
extern uint16_t htons(uint16_t);
|
|
|
|
extern __inline__ uint32_t __ntohl(uint32_t);
|
|
extern __inline__ uint16_t __ntohs(uint16_t);
|
|
|
|
extern __inline__ uint32_t
|
|
__ntohl(uint32_t x)
|
|
{
|
|
__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
|
|
"rorl $16,%0\n\t" /* swap words */
|
|
"xchgb %b0,%h0" /* swap higher bytes */
|
|
:"=q" (x)
|
|
: "0" (x));
|
|
return x;
|
|
}
|
|
|
|
#define __constant_ntohl(x) \
|
|
((uint32_t)((((uint32_t)(x) & 0x000000ffU) << 24) | \
|
|
(((uint32_t)(x) & 0x0000ff00U) << 8) | \
|
|
(((uint32_t)(x) & 0x00ff0000U) >> 8) | \
|
|
(((uint32_t)(x) & 0xff000000U) >> 24)))
|
|
|
|
extern __inline__ uint16_t
|
|
__ntohs(uint16_t x)
|
|
{
|
|
__asm__("xchgb %b0,%h0" /* swap bytes */
|
|
: "=q" (x)
|
|
: "0" (x));
|
|
return x;
|
|
}
|
|
|
|
#define __constant_ntohs(x) \
|
|
((uint16_t)((((uint16_t)(x) & 0x00ff) << 8) | \
|
|
(((uint16_t)(x) & 0xff00) >> 8))) \
|
|
|
|
#define __htonl(x) __ntohl(x)
|
|
#define __htons(x) __ntohs(x)
|
|
#define __constant_htonl(x) __constant_ntohl(x)
|
|
#define __constant_htons(x) __constant_ntohs(x)
|
|
|
|
#if defined (__OPTIMIZE__) && !defined (__NO_INLINE__)
|
|
# define ntohl(x) \
|
|
(__builtin_constant_p((long)(x)) ? \
|
|
__constant_ntohl((x)) : \
|
|
__ntohl((x)))
|
|
# define ntohs(x) \
|
|
(__builtin_constant_p((short)(x)) ? \
|
|
__constant_ntohs((x)) : \
|
|
__ntohs((x)))
|
|
# define htonl(x) \
|
|
(__builtin_constant_p((long)(x)) ? \
|
|
__constant_htonl((x)) : \
|
|
__htonl((x)))
|
|
# define htons(x) \
|
|
(__builtin_constant_p((short)(x)) ? \
|
|
__constant_htons((x)) : \
|
|
__htons((x)))
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|