1 /*
2 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification,
5 * are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this list of
8 * conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
11 * of conditions and the following disclaimer in the documentation and/or other materials
12 * provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #ifndef _ADAPT_BYTESWAP_H
32 #define _ADAPT_BYTESWAP_H
33
34 #include <sys/features.h>
35 #include <stdint.h>
36
__bswap_16(uint16_t __x)37 static __inline uint16_t __bswap_16(uint16_t __x)
38 {
39 return (__x << 8) | (__x >> 8);
40 }
41
__bswap_32(uint32_t __x)42 static __inline uint32_t __bswap_32(uint32_t __x)
43 {
44 return (__x >> 24) | ((__x >> 8) & 0xff00) | ((__x << 8) & 0xff0000) | (__x << 24);
45 }
46
__bswap_64(uint64_t __x)47 static __inline uint64_t __bswap_64(uint64_t __x)
48 {
49 return ((__bswap_32(__x) + 0ULL) << 32) | __bswap_32(__x >> 32);
50 }
51
52 #define bswap_16(x) __bswap_16(x)
53 #define bswap_32(x) __bswap_32(x)
54 #define bswap_64(x) __bswap_64(x)
55
56 #endif
57