/usr/include/libcob/byteswap.h is in libcob1-dev 1.1-2+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | /*
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* the Free Software Foundation, 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
/*
* Extracted from glib/gtypes.h in GLIB-2.2.2.
* Modified by Roger While
* Copyright (C) 2005-2009 Roger While
*/
#ifndef COB_BYTESWAP_H
#define COB_BYTESWAP_H
/* Basic bit swapping functions
*/
#define COB_BSWAP_16_CONSTANT(val) ((unsigned short) ( \
(unsigned short) ((unsigned short) (val) >> 8) | \
(unsigned short) ((unsigned short) (val) << 8)))
#define COB_BSWAP_32_CONSTANT(val) ((unsigned int) ( \
(((unsigned int) (val) & (unsigned int) 0x000000ffU) << 24) | \
(((unsigned int) (val) & (unsigned int) 0x0000ff00U) << 8) | \
(((unsigned int) (val) & (unsigned int) 0x00ff0000U) >> 8) | \
(((unsigned int) (val) & (unsigned int) 0xff000000U) >> 24)))
#define COB_BSWAP_64_CONSTANT(val) ((unsigned long long) ( \
(((unsigned long long) (val) & \
(unsigned long long) 0x00000000000000ffULL) << 56) | \
(((unsigned long long) (val) & \
(unsigned long long) 0x000000000000ff00ULL) << 40) | \
(((unsigned long long) (val) & \
(unsigned long long) 0x0000000000ff0000ULL) << 24) | \
(((unsigned long long) (val) & \
(unsigned long long) 0x00000000ff000000ULL) << 8) | \
(((unsigned long long) (val) & \
(unsigned long long) 0x000000ff00000000ULL) >> 8) | \
(((unsigned long long) (val) & \
(unsigned long long) 0x0000ff0000000000ULL) >> 24) | \
(((unsigned long long) (val) & \
(unsigned long long) 0x00ff000000000000ULL) >> 40) | \
(((unsigned long long) (val) & \
(unsigned long long) 0xff00000000000000ULL) >> 56)))
/* Arch specific stuff for speed */
#if defined (__GNUC__) && (__GNUC__ >= 2)
# if defined (__i386__)
# define COB_BSWAP_16_IA32(val) \
(__extension__ \
({ register unsigned short int __v, __x = ((unsigned short) (val)); \
if (__builtin_constant_p (__x)) \
__v = COB_BSWAP_16_CONSTANT (__x); \
else \
__asm__ ("rorw $8, %w0" \
: "=r" (__v) \
: "0" (__x) \
: "cc"); \
__v; }))
# define COB_BSWAP_32_IA32(val) \
(__extension__ \
({ register unsigned int __v, __x = ((unsigned int) (val)); \
if (__builtin_constant_p (__x)) \
__v = COB_BSWAP_32_CONSTANT (__x); \
else \
__asm__ ("bswap %0" \
: "=r" (__v) \
: "0" (__x)); \
__v; }))
# define COB_BSWAP_64_IA32(val) \
(__extension__ \
({ union { unsigned long long __ll; \
unsigned int __l[2]; } __w, __r; \
__w.__ll = ((unsigned long long) (val)); \
if (__builtin_constant_p (__w.__ll)) \
__r.__ll = COB_BSWAP_64_CONSTANT (__w.__ll); \
else \
{ \
__r.__l[0] = COB_BSWAP_32 (__w.__l[1]); \
__r.__l[1] = COB_BSWAP_32 (__w.__l[0]); \
} \
__r.__ll; }))
# define COB_BSWAP_16(val) (COB_BSWAP_16_IA32 (val))
# define COB_BSWAP_32(val) (COB_BSWAP_32_IA32 (val))
# define COB_BSWAP_64(val) (COB_BSWAP_64_IA32 (val))
# elif defined (__ia64__)
# define COB_BSWAP_16_IA64(val) \
(__extension__ \
({ register unsigned short __v, __x = ((unsigned short) (val)); \
if (__builtin_constant_p (__x)) \
__v = COB_BSWAP_16_CONSTANT (__x); \
else \
__asm__ __volatile__ ("shl %0 = %1, 48 ;;" \
"mux1 %0 = %0, @rev ;;" \
: "=r" (__v) \
: "r" (__x)); \
__v; }))
# define COB_BSWAP_32_IA64(val) \
(__extension__ \
({ register unsigned int __v, __x = ((unsigned int) (val)); \
if (__builtin_constant_p (__x)) \
__v = COB_BSWAP_32_CONSTANT (__x); \
else \
__asm__ __volatile__ ("shl %0 = %1, 32 ;;" \
"mux1 %0 = %0, @rev ;;" \
: "=r" (__v) \
: "r" (__x)); \
__v; }))
# define COB_BSWAP_64_IA64(val) \
(__extension__ \
({ register unsigned long long __v, \
__x = ((unsigned long long) (val)); \
if (__builtin_constant_p (__x)) \
__v = COB_BSWAP_64_CONSTANT (__x); \
else \
__asm__ __volatile__ ("mux1 %0 = %1, @rev ;;" \
: "=r" (__v) \
: "r" (__x)); \
__v; }))
# define COB_BSWAP_16(val) (COB_BSWAP_16_IA64 (val))
# define COB_BSWAP_32(val) (COB_BSWAP_32_IA64 (val))
# define COB_BSWAP_64(val) (COB_BSWAP_64_IA64 (val))
# elif defined (__x86_64__)
# define COB_BSWAP_16_X86_64(val) \
(__extension__ \
({ register unsigned short int __v, __x = ((unsigned short) (val)); \
if (__builtin_constant_p (__x)) \
__v = COB_BSWAP_16_CONSTANT (__x); \
else \
__asm__ ("rorw $8, %w0" \
: "=r" (__v) \
: "0" (__x) \
: "cc"); \
__v; }))
# define COB_BSWAP_32_X86_64(val) \
(__extension__ \
({ register unsigned int __v, __x = ((unsigned int) (val)); \
if (__builtin_constant_p (__x)) \
__v = COB_BSWAP_32_CONSTANT (__x); \
else \
__asm__ ("bswapl %0" \
: "=r" (__v) \
: "0" (__x)); \
__v; }))
# define COB_BSWAP_64_X86_64(val) \
(__extension__ \
({ register unsigned long long __v, __x = ((unsigned long long) (val)); \
if (__builtin_constant_p (__x)) \
__v = COB_BSWAP_64_CONSTANT (__x); \
else \
__asm__ ("bswapq %0" \
: "=r" (__v) \
: "0" (__x)); \
__v; }))
# define COB_BSWAP_16(val) (COB_BSWAP_16_X86_64 (val))
# define COB_BSWAP_32(val) (COB_BSWAP_32_X86_64 (val))
# define COB_BSWAP_64(val) (COB_BSWAP_64_X86_64 (val))
# else /* generic gcc */
# define COB_BSWAP_16(val) (COB_BSWAP_16_CONSTANT (val))
# define COB_BSWAP_32(val) (COB_BSWAP_32_CONSTANT (val))
# define COB_BSWAP_64(val) (COB_BSWAP_64_CONSTANT (val))
# endif
# elif defined (_MSC_VER)
# define COB_BSWAP_16(val) (_byteswap_ushort (val))
# define COB_BSWAP_32(val) (_byteswap_ulong (val))
# define COB_BSWAP_64(val) (_byteswap_uint64 (val))
#else /* generic */
# define COB_BSWAP_16(val) (COB_BSWAP_16_CONSTANT (val))
# define COB_BSWAP_32(val) (COB_BSWAP_32_CONSTANT (val))
# define COB_BSWAP_64(val) (COB_BSWAP_64_CONSTANT (val))
#endif /* generic */
#endif /* COB_BYTESWAP_H */
|