blob: 4540c31bbb6e690003cf84ecc666a58947ee3ea3 (
plain)
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
|
/*
* Copyright (c) 2010 Nicira Networks.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef UNALIGNED_H
#define UNALIGNED_H 1
#include <stdint.h>
#include "byte-order.h"
/* Public API. */
static inline uint16_t get_unaligned_u16(const uint16_t *);
static inline uint32_t get_unaligned_u32(const uint32_t *);
static inline uint64_t get_unaligned_u64(const uint64_t *);
static inline void put_unaligned_u16(uint16_t *, uint16_t);
static inline void put_unaligned_u32(uint32_t *, uint32_t);
static inline void put_unaligned_u64(uint64_t *, uint64_t);
#ifdef __GNUC__
/* GCC implementations. */
#define GCC_UNALIGNED_ACCESSORS(SIZE) \
struct unaligned_u##SIZE { \
uint##SIZE##_t x __attribute__((__packed__)); \
}; \
static inline struct unaligned_u##SIZE * \
unaligned_u##SIZE(const uint##SIZE##_t *p) \
{ \
return (struct unaligned_u##SIZE *) p; \
} \
\
static inline uint##SIZE##_t \
get_unaligned_u##SIZE(const uint##SIZE##_t *p) \
{ \
return unaligned_u##SIZE(p)->x; \
} \
\
static inline void \
put_unaligned_u##SIZE(uint##SIZE##_t *p, uint##SIZE##_t x) \
{ \
unaligned_u##SIZE(p)->x = x; \
}
GCC_UNALIGNED_ACCESSORS(16);
GCC_UNALIGNED_ACCESSORS(32);
GCC_UNALIGNED_ACCESSORS(64);
#else
/* Generic implementations. */
static inline uint16_t get_unaligned_u16(const uint16_t *p_)
{
const uint8_t *p = (const uint8_t *) p_;
return ntohs((p[0] << 8) | p[1]);
}
static inline void put_unaligned_u16(uint16_t *p_, uint16_t x_)
{
uint8_t *p = (uint8_t *) p_;
uint16_t x = ntohs(x_);
p[0] = x >> 8;
p[1] = x;
}
static inline uint32_t get_unaligned_u32(const uint32_t *p_)
{
const uint8_t *p = (const uint8_t *) p_;
return ntohl((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
}
static inline void put_unaligned_u32(uint32_t *p_, uint32_t x_)
{
uint8_t *p = (uint8_t *) p_;
uint32_t x = ntohl(x_);
p[0] = x >> 24;
p[1] = x >> 16;
p[2] = x >> 8;
p[3] = x;
}
static inline uint64_t get_unaligned_u64(const uint64_t *p_)
{
const uint8_t *p = (const uint8_t *) p_;
return ntohll(((uint64_t) p[0] << 56)
| ((uint64_t) p[1] << 48)
| ((uint64_t) p[2] << 40)
| ((uint64_t) p[3] << 32)
| (p[4] << 24)
| (p[5] << 16)
| (p[6] << 8)
| p[7]);
}
static inline void put_unaligned_u64(uint64_t *p_, uint64_t x_)
{
uint8_t *p = (uint8_t *) p_;
uint64_t x = ntohll(x_);
p[0] = x >> 56;
p[1] = x >> 48;
p[2] = x >> 40;
p[3] = x >> 32;
p[4] = x >> 24;
p[5] = x >> 16;
p[6] = x >> 8;
p[7] = x;
}
#endif
#endif /* unaligned.h */
|
