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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | #pragma once | |
4 | ||
5 | /*** | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2014 Tom Gundersen | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU Lesser General Public License as published by | |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Lesser General Public License | |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
22 | ***/ | |
23 | ||
7f034e98 | 24 | #include <endian.h> |
f089257d TG |
25 | #include <stdint.h> |
26 | ||
7f034e98 DM |
27 | /* BE */ |
28 | ||
617e7946 TG |
29 | static inline uint16_t unaligned_read_be16(const void *_u) { |
30 | const uint8_t *u = _u; | |
f089257d | 31 | |
617e7946 TG |
32 | return (((uint16_t) u[0]) << 8) | |
33 | ((uint16_t) u[1]); | |
f089257d TG |
34 | } |
35 | ||
617e7946 TG |
36 | static inline uint32_t unaligned_read_be32(const void *_u) { |
37 | const uint8_t *u = _u; | |
38 | ||
39 | return (((uint32_t) unaligned_read_be16(u)) << 16) | | |
40 | ((uint32_t) unaligned_read_be16(u + 2)); | |
f089257d TG |
41 | } |
42 | ||
617e7946 TG |
43 | static inline uint64_t unaligned_read_be64(const void *_u) { |
44 | const uint8_t *u = _u; | |
45 | ||
46 | return (((uint64_t) unaligned_read_be32(u)) << 32) | | |
47 | ((uint64_t) unaligned_read_be32(u + 4)); | |
f089257d TG |
48 | } |
49 | ||
617e7946 TG |
50 | static inline void unaligned_write_be16(void *_u, uint16_t a) { |
51 | uint8_t *u = _u; | |
52 | ||
53 | u[0] = (uint8_t) (a >> 8); | |
54 | u[1] = (uint8_t) a; | |
f089257d TG |
55 | } |
56 | ||
617e7946 TG |
57 | static inline void unaligned_write_be32(void *_u, uint32_t a) { |
58 | uint8_t *u = _u; | |
59 | ||
60 | unaligned_write_be16(u, (uint16_t) (a >> 16)); | |
61 | unaligned_write_be16(u + 2, (uint16_t) a); | |
f089257d TG |
62 | } |
63 | ||
617e7946 TG |
64 | static inline void unaligned_write_be64(void *_u, uint64_t a) { |
65 | uint8_t *u = _u; | |
66 | ||
67 | unaligned_write_be32(u, (uint32_t) (a >> 32)); | |
68 | unaligned_write_be32(u + 4, (uint32_t) a); | |
f089257d | 69 | } |
7f034e98 DM |
70 | |
71 | /* LE */ | |
72 | ||
73 | static inline uint16_t unaligned_read_le16(const void *_u) { | |
74 | const uint8_t *u = _u; | |
75 | ||
76 | return (((uint16_t) u[1]) << 8) | | |
77 | ((uint16_t) u[0]); | |
78 | } | |
79 | ||
80 | static inline uint32_t unaligned_read_le32(const void *_u) { | |
81 | const uint8_t *u = _u; | |
82 | ||
83 | return (((uint32_t) unaligned_read_le16(u + 2)) << 16) | | |
84 | ((uint32_t) unaligned_read_le16(u)); | |
85 | } | |
86 | ||
87 | static inline uint64_t unaligned_read_le64(const void *_u) { | |
88 | const uint8_t *u = _u; | |
89 | ||
90 | return (((uint64_t) unaligned_read_le32(u + 4)) << 32) | | |
91 | ((uint64_t) unaligned_read_le32(u)); | |
92 | } | |
93 | ||
94 | static inline void unaligned_write_le16(void *_u, uint16_t a) { | |
95 | uint8_t *u = _u; | |
96 | ||
97 | u[0] = (uint8_t) a; | |
98 | u[1] = (uint8_t) (a >> 8); | |
99 | } | |
100 | ||
101 | static inline void unaligned_write_le32(void *_u, uint32_t a) { | |
102 | uint8_t *u = _u; | |
103 | ||
104 | unaligned_write_le16(u, (uint16_t) a); | |
105 | unaligned_write_le16(u + 2, (uint16_t) (a >> 16)); | |
106 | } | |
107 | ||
108 | static inline void unaligned_write_le64(void *_u, uint64_t a) { | |
109 | uint8_t *u = _u; | |
110 | ||
111 | unaligned_write_le32(u, (uint32_t) a); | |
112 | unaligned_write_le32(u + 4, (uint32_t) (a >> 32)); | |
113 | } |