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
|
#ifndef ENDIAN_H_INCLUDED
#define ENDIAN_H_INCLUDED
/* Ogle - A video player
* Copyright (C) 2001 Martin Norbck
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* For now, just 16,32 bit byteswap */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef WORDS_BIGENDIAN
# define FROM_BE_16(x) (x)
# define FROM_BE_32(x) (x)
#else
#if defined(HAVE_SYS_PARAM_H)
#include <sys/param.h>
#endif
#if defined(HAVE_BYTESWAP_H)
# include <byteswap.h>
# define FROM_BE_16(x) (bswap_16(x))
# define FROM_BE_32(x) (bswap_32(x))
#elif defined(HAVE_SYS_BSWAP_H)
# include <sys/bswap.h>
# define FROM_BE_16(x) (bswap16(x))
# define FROM_BE_32(x) (bswap32(x))
#elif defined(HAVE_SYS_ENDIAN_H) && !defined(__FreeBSD__)
# include <sys/endian.h>
# define FROM_BE_16(x) (swap16(x))
# define FROM_BE_32(x) (swap32(x))
#elif defined(HAVE_SYS_ENDIAN_H) && defined(__FreeBSD__) && __FreeBSD_version >= 470000
# include <sys/endian.h>
# define FROM_BE_16(x) (be16toh(x))
# define FROM_BE_32(x) (be32toh(x))
#else
# warning "No accelerated byte swap found. Using slow c version."
# include <inttypes.h>
static inline uint32_t FROM_BE_32(uint32_t x)
{
return (((x & 0xff000000) >> 24) |
((x & 0x00ff0000) >> 8) |
((x & 0x0000ff00) << 8) |
((x & 0x000000ff) << 24));
}
static inline uint16_t FROM_BE_16(uint16_t x)
{
return (((x & 0xff00) >> 8) |
((x & 0x00ff) << 8));
}
#endif /* INCLUDE TESTS */
#endif /* WORDS_BIGENDIAN */
#endif /* ENDIAN_H_INCLUDED */
|
