mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 18:40:14 +00:00
7782d0bf55
* sys/types.h: Protect use of long long by __extension__. * stdlib/stdlib.h: Likewise. * string/string.h: Likewise. * sysdeps/i386/bits/byteswap.h: Likewise. * sysdeps/geeric/bits/byteswap.h: Likewise. * sysdeps/i386/fpu/bits/mathinline.h: Likewise. * sysdeps/unix/sysv/linux/bits/types.h: Likewise. * sysdeps/unix/sysv/linux/mips/bits/types.h: Likewise. * sysdeps/wordsize-32/inttypes.h: Likewise. * sysdeps/wordsize-32/stdint.h: Likewise. * wcsmbs/wchar.h: Likewise.
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/* Macros to swap the order of bytes in integer values.
|
|
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
|
|
# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
|
|
#endif
|
|
|
|
/* Swap bytes in 16 bit value. */
|
|
#ifdef __GNUC__
|
|
# define __bswap_16(x) \
|
|
(__extension__ \
|
|
({ unsigned short int __bsx = (x); \
|
|
((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8)); }))
|
|
#else
|
|
static __inline unsigned short int
|
|
__bswap16 (unsigned short int x)
|
|
{
|
|
return ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8));
|
|
}
|
|
#endif
|
|
|
|
/* Swap bytes in 32 bit value. */
|
|
#ifdef __GNUC__
|
|
# define __bswap_32(x) \
|
|
(__extension__ \
|
|
({ unsigned int __bsx = (x); \
|
|
((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) | \
|
|
(((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24)); }))
|
|
#else
|
|
static __inline unsigned int
|
|
__bswap32 (unsigned int x)
|
|
{
|
|
return ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) |
|
|
(((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24));
|
|
}
|
|
#endif
|
|
|
|
#if defined __GNUC__ && __GNUC__ >= 2
|
|
/* Swap bytes in 64 bit value. */
|
|
# define __bswap_64(x) \
|
|
(__extension__ \
|
|
({ union { unsigned long long int __ll; \
|
|
unsigned long int __l[2]; } __v, __r; \
|
|
__v.__ll = (x); \
|
|
__r.__l[0] = __bswap_32 (__v.__l[1]); \
|
|
__r.__l[1] = __bswap_32 (__v.__l[0]); \
|
|
__r.__ll; }))
|
|
#endif
|