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authorMaurus Cuelenaere <mcuelenaere@gmail.com>2008-07-11 15:50:46 +0000
committerMaurus Cuelenaere <mcuelenaere@gmail.com>2008-07-11 15:50:46 +0000
commit14c7f45cdae826f88dc539c8c38dd95caf305731 (patch)
tree832da054b7cfb2dc6fd63339af736625f31d21aa /utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/endianness.c
parent7c84ede3781c27db73403bd6302f320c76a58c8c (diff)
downloadrockbox-14c7f45cdae826f88dc539c8c38dd95caf305731.tar.gz
rockbox-14c7f45cdae826f88dc539c8c38dd95caf305731.zip
Add zook's ZenUtils to SVN
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18010 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/endianness.c')
-rwxr-xr-xutils/zenutils/libraries/beecrypt-4.1.2/beecrypt/endianness.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/endianness.c b/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/endianness.c
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+++ b/utils/zenutils/libraries/beecrypt-4.1.2/beecrypt/endianness.c
@@ -0,0 +1,94 @@
1/*
2 * Copyright (c) 1998, 1999, 2000, 2001 Virtual Unlimited B.V.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 */
19
20/*!\file endianness.c
21 * \brief Endian-dependant encoding/decoding.
22 * \author Bob Deblier <bob.deblier@pandora.be>
23 */
24
25#define BEECRYPT_DLL_EXPORT
26
27#if HAVE_CONFIG_H
28# include "config.h"
29#endif
30
31#if HAVE_ENDIAN_H && HAVE_ASM_BYTEORDER_H
32# include <endian.h>
33#endif
34
35#include "beecrypt/endianness.h"
36
37#undef swap16
38#undef swapu16
39#undef swap32
40#undef swapu32
41#undef swap64
42#undef swapu64
43
44int16_t swap16(int16_t n)
45{
46 return ( ((n & 0xff) << 8) |
47 ((n & 0xff00) >> 8) );
48}
49
50uint16_t swapu16(uint16_t n)
51{
52 return ( ((n & 0xffU) << 8) |
53 ((n & 0xff00U) >> 8) );
54}
55
56int32_t swap32(int32_t n)
57{
58 return ( ((n & 0xff) << 24) |
59 ((n & 0xff00) << 8) |
60 ((n & 0xff0000) >> 8) |
61 ((n & 0xff000000) >> 24) );
62}
63
64uint32_t swapu32(uint32_t n)
65{
66 return ( ((n & 0xffU) << 24) |
67 ((n & 0xff00U) << 8) |
68 ((n & 0xff0000U) >> 8) |
69 ((n & 0xff000000U) >> 24) );
70}
71
72int64_t swap64(int64_t n)
73{
74 return ( ((n & (((int64_t) 0xff) )) << 56) |
75 ((n & (((int64_t) 0xff) << 8)) << 40) |
76 ((n & (((int64_t) 0xff) << 16)) << 24) |
77 ((n & (((int64_t) 0xff) << 24)) << 8) |
78 ((n & (((int64_t) 0xff) << 32)) >> 8) |
79 ((n & (((int64_t) 0xff) << 40)) >> 24) |
80 ((n & (((int64_t) 0xff) << 48)) >> 40) |
81 ((n & (((int64_t) 0xff) << 56)) >> 56) );
82}
83
84uint64_t swapu64(uint64_t n)
85{
86 return ( ((n & (((uint64_t) 0xff) )) << 56) |
87 ((n & (((uint64_t) 0xff) << 8)) << 40) |
88 ((n & (((uint64_t) 0xff) << 16)) << 24) |
89 ((n & (((uint64_t) 0xff) << 24)) << 8) |
90 ((n & (((uint64_t) 0xff) << 32)) >> 8) |
91 ((n & (((uint64_t) 0xff) << 40)) >> 24) |
92 ((n & (((uint64_t) 0xff) << 48)) >> 40) |
93 ((n & (((uint64_t) 0xff) << 56)) >> 56) );
94}