blob: c8cf125aeb81c5c2bdf384362549e34cc4e6a07b (
plain) (
blame)
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
|
///////////////////////////////////////////////////////////////////////////////
//
/// \file bswap.h
/// \brief Byte swapping
//
// Author: Lasse Collin
//
// This file has been put into the public domain.
// You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef LZMA_BSWAP_H
#define LZMA_BSWAP_H
// NOTE: We assume that config.h is already #included.
// At least glibc has byteswap.h which contains inline assembly code for
// byteswapping. Some systems have byteswap.h but lack one or more of the
// bswap_xx macros/functions, which is why we check them separately even
// if byteswap.h is available.
#ifdef HAVE_BYTESWAP_H
# include <byteswap.h>
#endif
#ifndef HAVE_BSWAP_16
# define bswap_16(num) \
(((num) << 8) | ((num) >> 8))
#endif
#ifndef HAVE_BSWAP_32
# define bswap_32(num) \
( (((num) << 24) ) \
| (((num) << 8) & UINT32_C(0x00FF0000)) \
| (((num) >> 8) & UINT32_C(0x0000FF00)) \
| (((num) >> 24) ) )
#endif
#ifndef HAVE_BSWAP_64
# define bswap_64(num) \
( (((num) << 56) ) \
| (((num) << 40) & UINT64_C(0x00FF000000000000)) \
| (((num) << 24) & UINT64_C(0x0000FF0000000000)) \
| (((num) << 8) & UINT64_C(0x000000FF00000000)) \
| (((num) >> 8) & UINT64_C(0x00000000FF000000)) \
| (((num) >> 24) & UINT64_C(0x0000000000FF0000)) \
| (((num) >> 40) & UINT64_C(0x000000000000FF00)) \
| (((num) >> 56) ) )
#endif
#endif
|
