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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/**
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35 * \file
36 * Endian conversion functions
37 */
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38
39#ifndef SPDK_ENDIAN_H
40#define SPDK_ENDIAN_H
41
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42#include "spdk/stdinc.h"
43
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44#ifdef __cplusplus
45extern "C" {
46#endif
47
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48static inline uint16_t
49from_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
55static inline void
56to_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
63static inline uint32_t
64from_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
73static inline void
74to_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
83static inline uint64_t
84from_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
97static inline void
98to_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
111static inline uint16_t
112from_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
118static inline void
119to_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
126static inline uint32_t
127from_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
136static inline void
137to_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
146static inline uint64_t
147from_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
160static inline void
161to_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