1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_BASE_ENDIAN_H
18#define ANDROID_BASE_ENDIAN_H
19
20/* A cross-platform equivalent of bionic's <sys/endian.h>. */
21
22#if defined(__BIONIC__)
23
24#include <sys/endian.h>
25
26#elif defined(__GLIBC__)
27
28/* glibc's <endian.h> is like bionic's <sys/endian.h>. */
29#include <endian.h>
30
31/* glibc keeps htons and htonl in <netinet/in.h>. */
32#include <netinet/in.h>
33
34/* glibc doesn't have the 64-bit variants. */
35#define htonq(x) htobe64(x)
36#define ntohq(x) be64toh(x)
37
38/* glibc has different names to BSD for these. */
39#define betoh16(x) be16toh(x)
40#define betoh32(x) be32toh(x)
41#define betoh64(x) be64toh(x)
42
43#else
44
45/* Mac OS and Windows have nothing. */
46
47#define __LITTLE_ENDIAN 1234
48#define LITTLE_ENDIAN __LITTLE_ENDIAN
49
50#define __BIG_ENDIAN 4321
51#define BIG_ENDIAN __BIG_ENDIAN
52
53#define __BYTE_ORDER __LITTLE_ENDIAN
54#define BYTE_ORDER __BYTE_ORDER
55
56#define htons(x) __builtin_bswap16(x)
57#define htonl(x) __builtin_bswap32(x)
58#define htonq(x) __builtin_bswap64(x)
59
60#define ntohs(x) __builtin_bswap16(x)
61#define ntohl(x) __builtin_bswap32(x)
62#define ntohq(x) __builtin_bswap64(x)
63
64#define htobe16(x) __builtin_bswap16(x)
65#define htobe32(x) __builtin_bswap32(x)
66#define htobe64(x) __builtin_bswap64(x)
67
68#define betoh16(x) __builtin_bswap16(x)
69#define betoh32(x) __builtin_bswap32(x)
70#define betoh64(x) __builtin_bswap64(x)
71
72#define htole16(x) (x)
73#define htole32(x) (x)
74#define htole64(x) (x)
75
76#define letoh16(x) (x)
77#define letoh32(x) (x)
78#define letoh64(x) (x)
79
80#define be16toh(x) __builtin_bswap16(x)
81#define be32toh(x) __builtin_bswap32(x)
82#define be64toh(x) __builtin_bswap64(x)
83
84#define le16toh(x) (x)
85#define le32toh(x) (x)
86#define le64toh(x) (x)
87
88#endif
89
90#endif  // ANDROID_BASE_ENDIAN_H
91