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
|
/*
* bitXXgen.h
*
* Copyright (C) 2014 Max <max.suraev@fairwaves.co>
*
* All Rights Reserved
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
/*! \brief load unaligned n-byte integer (little-endian encoding) into uintXX_t
* \param[in] p Buffer where integer is stored
* \param[in] n Number of bytes stored in p
* \returns XX bit unsigned integer
*/
static inline uintXX_t osmo_loadXXle_ext(const void *p, uint8_t n)
{
uint8_t i;
uintXX_t r = 0;
const uint8_t *q = (uint8_t *)p;
for(i = 0; i < n; r |= ((uintXX_t)q[i] << (8 * i)), i++);
return r;
}
/*! \brief load unaligned n-byte integer (big-endian encoding) into uintXX_t
* \param[in] p Buffer where integer is stored
* \param[in] n Number of bytes stored in p
* \returns XX bit unsigned integer
*/
static inline uintXX_t osmo_loadXXbe_ext(const void *p, uint8_t n)
{
uint8_t i;
uintXX_t r = 0;
const uint8_t *q = (uint8_t *)p;
for(i = 0; i < n; r |= ((uintXX_t)q[i] << (XX - 8* (1 + i))), i++);
return r;
}
/*! \brief store unaligned n-byte integer (little-endian encoding) into uintXX_t
* \param[in] x unsigned XX bit integer
* \param[out] p Buffer to store integer
* \param[in] n Number of bytes to store
*/
static inline void osmo_storeXXle_ext(uintXX_t x, void *p, uint8_t n)
{
uint8_t i;
uint8_t *q = (uint8_t *)p;
for(i = 0; i < n; q[i] = (x >> i * 8) & 0xFF, i++);
}
/*! \brief store unaligned n-byte integer (big-endian encoding) into uintXX_t
* \param[in] x unsigned XX bit integer
* \param[out] p Buffer to store integer
* \param[in] n Number of bytes to store
*/
static inline void osmo_storeXXbe_ext(uintXX_t x, void *p, uint8_t n)
{
uint8_t i;
uint8_t *q = (uint8_t *)p;
for(i = 0; i < n; q[i] = (x >> ((n - 1 - i) * 8)) & 0xFF, i++);
}
/* Convenience function for most-used cases */
/*! \brief load unaligned XX-bit integer (little-endian encoding) */
static inline uintXX_t osmo_loadXXle(const void *p)
{
return osmo_loadXXle_ext(p, XX / 8);
}
/*! \brief load unaligned XX-bit integer (big-endian encoding) */
static inline uintXX_t osmo_loadXXbe(const void *p)
{
return osmo_loadXXbe_ext(p, XX / 8);
}
/*! \brief store unaligned XX-bit integer (little-endian encoding) */
static inline void osmo_storeXXle(uintXX_t x, void *p)
{
osmo_storeXXle_ext(x, p, XX / 8);
}
/*! \brief store unaligned XX-bit integer (big-endian encoding) */
static inline void osmo_storeXXbe(uintXX_t x, void *p)
{
osmo_storeXXbe_ext(x, p, XX / 8);
}
|
