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7c673cae FG |
1 | /*- |
2 | * BSD LICENSE | |
3 | * | |
4 | * Copyright (c) Intel Corporation. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * * Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * * Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in | |
15 | * the documentation and/or other materials provided with the | |
16 | * distribution. | |
17 | * * Neither the name of Intel Corporation nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
22 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
24 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
25 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
26 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
27 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | /** | |
11fdf7f2 TL |
35 | * \file |
36 | * Endian conversion functions | |
37 | */ | |
7c673cae FG |
38 | |
39 | #ifndef SPDK_ENDIAN_H | |
40 | #define SPDK_ENDIAN_H | |
41 | ||
11fdf7f2 TL |
42 | #include "spdk/stdinc.h" |
43 | ||
7c673cae FG |
44 | #ifdef __cplusplus |
45 | extern "C" { | |
46 | #endif | |
47 | ||
7c673cae FG |
48 | static inline uint16_t |
49 | from_be16(const void *ptr) | |
50 | { | |
51 | const uint8_t *tmp = (const uint8_t *)ptr; | |
52 | return (((uint16_t)tmp[0] << 8) | tmp[1]); | |
53 | } | |
54 | ||
55 | static inline void | |
56 | to_be16(void *out, uint16_t in) | |
57 | { | |
58 | uint8_t *tmp = (uint8_t *)out; | |
59 | tmp[0] = (in >> 8) & 0xFF; | |
60 | tmp[1] = in & 0xFF; | |
61 | } | |
62 | ||
63 | static inline uint32_t | |
64 | from_be32(const void *ptr) | |
65 | { | |
66 | const uint8_t *tmp = (const uint8_t *)ptr; | |
67 | return (((uint32_t)tmp[0] << 24) | | |
68 | ((uint32_t)tmp[1] << 16) | | |
69 | ((uint32_t)tmp[2] << 8) | | |
70 | ((uint32_t)tmp[3])); | |
71 | } | |
72 | ||
73 | static inline void | |
74 | to_be32(void *out, uint32_t in) | |
75 | { | |
76 | uint8_t *tmp = (uint8_t *)out; | |
77 | tmp[0] = (in >> 24) & 0xFF; | |
78 | tmp[1] = (in >> 16) & 0xFF; | |
79 | tmp[2] = (in >> 8) & 0xFF; | |
80 | tmp[3] = in & 0xFF; | |
81 | } | |
82 | ||
83 | static inline uint64_t | |
84 | from_be64(const void *ptr) | |
85 | { | |
86 | const uint8_t *tmp = (const uint8_t *)ptr; | |
87 | return (((uint64_t)tmp[0] << 56) | | |
88 | ((uint64_t)tmp[1] << 48) | | |
89 | ((uint64_t)tmp[2] << 40) | | |
90 | ((uint64_t)tmp[3] << 32) | | |
91 | ((uint64_t)tmp[4] << 24) | | |
92 | ((uint64_t)tmp[5] << 16) | | |
93 | ((uint64_t)tmp[6] << 8) | | |
94 | ((uint64_t)tmp[7])); | |
95 | } | |
96 | ||
97 | static inline void | |
98 | to_be64(void *out, uint64_t in) | |
99 | { | |
100 | uint8_t *tmp = (uint8_t *)out; | |
101 | tmp[0] = (in >> 56) & 0xFF; | |
102 | tmp[1] = (in >> 48) & 0xFF; | |
103 | tmp[2] = (in >> 40) & 0xFF; | |
104 | tmp[3] = (in >> 32) & 0xFF; | |
105 | tmp[4] = (in >> 24) & 0xFF; | |
106 | tmp[5] = (in >> 16) & 0xFF; | |
107 | tmp[6] = (in >> 8) & 0xFF; | |
108 | tmp[7] = in & 0xFF; | |
109 | } | |
110 | ||
111 | static inline uint16_t | |
112 | from_le16(const void *ptr) | |
113 | { | |
114 | const uint8_t *tmp = (const uint8_t *)ptr; | |
115 | return (((uint16_t)tmp[1] << 8) | tmp[0]); | |
116 | } | |
117 | ||
118 | static inline void | |
119 | to_le16(void *out, uint16_t in) | |
120 | { | |
121 | uint8_t *tmp = (uint8_t *)out; | |
122 | tmp[1] = (in >> 8) & 0xFF; | |
123 | tmp[0] = in & 0xFF; | |
124 | } | |
125 | ||
126 | static inline uint32_t | |
127 | from_le32(const void *ptr) | |
128 | { | |
129 | const uint8_t *tmp = (const uint8_t *)ptr; | |
130 | return (((uint32_t)tmp[3] << 24) | | |
131 | ((uint32_t)tmp[2] << 16) | | |
132 | ((uint32_t)tmp[1] << 8) | | |
133 | ((uint32_t)tmp[0])); | |
134 | } | |
135 | ||
136 | static inline void | |
137 | to_le32(void *out, uint32_t in) | |
138 | { | |
139 | uint8_t *tmp = (uint8_t *)out; | |
140 | tmp[3] = (in >> 24) & 0xFF; | |
141 | tmp[2] = (in >> 16) & 0xFF; | |
142 | tmp[1] = (in >> 8) & 0xFF; | |
143 | tmp[0] = in & 0xFF; | |
144 | } | |
145 | ||
146 | static inline uint64_t | |
147 | from_le64(const void *ptr) | |
148 | { | |
149 | const uint8_t *tmp = (const uint8_t *)ptr; | |
150 | return (((uint64_t)tmp[7] << 56) | | |
151 | ((uint64_t)tmp[6] << 48) | | |
152 | ((uint64_t)tmp[5] << 40) | | |
153 | ((uint64_t)tmp[4] << 32) | | |
154 | ((uint64_t)tmp[3] << 24) | | |
155 | ((uint64_t)tmp[2] << 16) | | |
156 | ((uint64_t)tmp[1] << 8) | | |
157 | ((uint64_t)tmp[0])); | |
158 | } | |
159 | ||
160 | static inline void | |
161 | to_le64(void *out, uint64_t in) | |
162 | { | |
163 | uint8_t *tmp = (uint8_t *)out; | |
164 | tmp[7] = (in >> 56) & 0xFF; | |
165 | tmp[6] = (in >> 48) & 0xFF; | |
166 | tmp[5] = (in >> 40) & 0xFF; | |
167 | tmp[4] = (in >> 32) & 0xFF; | |
168 | tmp[3] = (in >> 24) & 0xFF; | |
169 | tmp[2] = (in >> 16) & 0xFF; | |
170 | tmp[1] = (in >> 8) & 0xFF; | |
171 | tmp[0] = in & 0xFF; | |
172 | } | |
173 | ||
174 | #ifdef __cplusplus | |
175 | } | |
176 | #endif | |
177 | ||
178 | #endif |