1/*
2 * librdkafka - Apache Kafka C library
3 *
4 * Copyright (c) 2012-2015 Magnus Edenhill
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 are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28#ifndef _RDENDIAN_H_
29#define _RDENDIAN_H_
30
31/**
32 * Provides portable endian-swapping macros/functions.
33 *
34 * be64toh()
35 * htobe64()
36 * be32toh()
37 * htobe32()
38 * be16toh()
39 * htobe16()
40 * le64toh()
41 */
42
43#ifdef __FreeBSD__
44 #include <sys/endian.h>
45#elif defined __GLIBC__
46 #include <endian.h>
47 #ifndef be64toh
48 /* Support older glibc (<2.9) which lack be64toh */
49 #include <byteswap.h>
50 #if __BYTE_ORDER == __BIG_ENDIAN
51 #define be16toh(x) (x)
52 #define be32toh(x) (x)
53 #define be64toh(x) (x)
54 #define le64toh(x) __bswap_64 (x)
55 #define le32toh(x) __bswap_32 (x)
56 #else
57 #define be16toh(x) __bswap_16 (x)
58 #define be32toh(x) __bswap_32 (x)
59 #define be64toh(x) __bswap_64 (x)
60 #define le64toh(x) (x)
61 #define le32toh(x) (x)
62 #endif
63 #endif
64
65#elif defined __CYGWIN__
66 #include <endian.h>
67#elif defined __BSD__
68 #include <sys/endian.h>
69#elif defined __sun
70 #include <sys/byteorder.h>
71 #include <sys/isa_defs.h>
72#define __LITTLE_ENDIAN 1234
73#define __BIG_ENDIAN 4321
74#ifdef _BIG_ENDIAN
75#define __BYTE_ORDER __BIG_ENDIAN
76#define be64toh(x) (x)
77#define be32toh(x) (x)
78#define be16toh(x) (x)
79#define le16toh(x) ((uint16_t)BSWAP_16(x))
80#define le32toh(x) BSWAP_32(x)
81#define le64toh(x) BSWAP_64(x)
82# else
83#define __BYTE_ORDER __LITTLE_ENDIAN
84#define be64toh(x) BSWAP_64(x)
85#define be32toh(x) ntohl(x)
86#define be16toh(x) ntohs(x)
87#define le16toh(x) (x)
88#define le32toh(x) (x)
89#define le64toh(x) (x)
90#define htole16(x) (x)
91#define htole64(x) (x)
92#endif /* __sun */
93
94#elif defined __APPLE__
95 #include <machine/endian.h>
96 #include <libkern/OSByteOrder.h>
97#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
98#define be64toh(x) (x)
99#define be32toh(x) (x)
100#define be16toh(x) (x)
101#define le16toh(x) OSSwapInt16(x)
102#define le32toh(x) OSSwapInt32(x)
103#define le64toh(x) OSSwapInt64(x)
104#else
105#define be64toh(x) OSSwapInt64(x)
106#define be32toh(x) OSSwapInt32(x)
107#define be16toh(x) OSSwapInt16(x)
108#define le16toh(x) (x)
109#define le32toh(x) (x)
110#define le64toh(x) (x)
111#endif
112
113#elif defined(_MSC_VER)
114#include <intrin.h>
115
116#define be64toh(x) _byteswap_uint64(x)
117#define be32toh(x) _byteswap_ulong(x)
118#define be16toh(x) _byteswap_ushort(x)
119#define le16toh(x) (x)
120#define le32toh(x) (x)
121#define le64toh(x) (x)
122
123#elif defined _AIX /* AIX is always big endian */
124#define be64toh(x) (x)
125#define be32toh(x) (x)
126#define be16toh(x) (x)
127#define le32toh(x) \
128 ((((x) & 0xff) << 24) | \
129 (((x) & 0xff00) << 8) | \
130 (((x) & 0xff0000) >> 8) | \
131 (((x) & 0xff000000) >> 24))
132#define le64toh(x) \
133 ((((x) & 0x00000000000000ffL) << 56) | \
134 (((x) & 0x000000000000ff00L) << 40) | \
135 (((x) & 0x0000000000ff0000L) << 24) | \
136 (((x) & 0x00000000ff000000L) << 8) | \
137 (((x) & 0x000000ff00000000L) >> 8) | \
138 (((x) & 0x0000ff0000000000L) >> 24) | \
139 (((x) & 0x00ff000000000000L) >> 40) | \
140 (((x) & 0xff00000000000000L) >> 56))
141#else
142 #include <endian.h>
143#endif
144
145
146
147/*
148 * On Solaris, be64toh is a function, not a macro, so there's no need to error
149 * if it's not defined.
150 */
151#if !defined(__sun) && !defined(be64toh)
152#error Missing definition for be64toh
153#endif
154
155#ifndef be32toh
156#define be32toh(x) ntohl(x)
157#endif
158
159#ifndef be16toh
160#define be16toh(x) ntohs(x)
161#endif
162
163#ifndef htobe64
164#define htobe64(x) be64toh(x)
165#endif
166#ifndef htobe32
167#define htobe32(x) be32toh(x)
168#endif
169#ifndef htobe16
170#define htobe16(x) be16toh(x)
171#endif
172
173#ifndef htole32
174#define htole32(x) le32toh(x)
175#endif
176
177#endif /* _RDENDIAN_H_ */
178