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The Pier Shareware 6
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The_Pier_Shareware_Number_6_(The_Pier_Exchange)_(1995).iso
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036
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emxfix02.zip
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emx
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include
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machine
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endian.h
Wrap
C/C++ Source or Header
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1994-12-07
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4KB
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137 lines
/*
* Copyright (c) 1987, 1991 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)endian.h 7.8 (Berkeley) 4/3/91
* $Id: endian.h,v 1.9 1994/02/12 07:23:49 cgd Exp $
*/
#ifndef _MACHINE_ENDIAN_H_
#define _MACHINE_ENDIAN_H_
/*
* Define the order of 32-bit words in 64-bit words.
*/
#define _QUAD_HIGHWORD 1
#define _QUAD_LOWWORD 0
#ifndef _POSIX_SOURCE
/*
* Definitions for byte order, according to byte significance from low
* address to high.
*/
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
#define BYTE_ORDER LITTLE_ENDIAN
unsigned long htonl(unsigned long);
unsigned short htons(unsigned short);
unsigned long ntohl(unsigned long);
unsigned short ntohs(unsigned short);
#ifndef __EMX__
#ifdef __GNUC__
#if __GNUC__ >= 2
#if defined(KERNEL) && ((defined(I486_CPU) || defined(I586_CPU)) && !defined(I386_CPU))
#define __byte_swap_long(x) \
({ register unsigned long __x = (x); \
asm ("bswap %1" \
: "=q" (__x) \
: "0" (__x)); \
__x; })
#else
#define __byte_swap_long(x) \
({ register unsigned long __x = (x); \
asm ("xchgb %h1, %b1\n\trorl $16, %1\n\txchgb %h1, %b1" \
: "=q" (__x) \
: "0" (__x)); \
__x; })
#endif /* KERNEL && ... */
#define __byte_swap_word(x) \
({ register unsigned short __x = (x); \
asm ("xchgb %h1, %b1" \
: "=q" (__x) \
: "0" (__x)); \
__x; })
#else /* __GNUC__ >= 2 */
#if defined(KERNEL) && ((defined(I486_CPU) || defined(I586_CPU)) && !defined(I386_CPU))
#define __byte_swap_long(x) \
({ register unsigned long __x = (x); \
asm ("bswap %1" \
: "=r" (__x) \
: "0" (__x)); \
__x; })
#else
#define __byte_swap_long(x) \
({ register u_long __x = (x); \
asm ("rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1" \
: "=r" (__x) \
: "0" (__x)); \
__x; })
#endif /* KERNEL && ... */
#define __byte_swap_word(x) \
({ register u_short __x = (x); \
asm ("rorw $8, %w1" \
: "=r" (__x) \
: "0" (__x)); \
__x; })
#endif /* __GNUC__ >= 2 */
#define ntohl(x) __byte_swap_long(x)
#define ntohs(x) __byte_swap_word(x)
#define htonl(x) __byte_swap_long(x)
#define htons(x) __byte_swap_word(x)
#endif /* __GNUC__ */
#endif /* not __EMX__ */
/*
* Macros for network/external number representation conversion.
*/
#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 /* _POSIX_SOURCE */
#endif /* _MACHINE_ENDIAN_H_ */