gwenhywfar 5.11.2beta
portable_endian.h
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1// "License": Public Domain
2// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like.
3// In case there are jurisdictions that don't support putting things in the public domain you can also consider it to
4// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it
5// an example on how to get the endian conversion functions on different platforms.
6
7#ifndef PORTABLE_ENDIAN_H__
8#define PORTABLE_ENDIAN_H__
9
10#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
11
12# define __WINDOWS__
13
14#endif
15
16#if defined(__linux__) || defined(__CYGWIN__)
17
18# include <endian.h>
19
20#elif defined(__APPLE__)
21
22# include <libkern/OSByteOrder.h>
23
24# define htobe16(x) OSSwapHostToBigInt16(x)
25# define htole16(x) OSSwapHostToLittleInt16(x)
26# define be16toh(x) OSSwapBigToHostInt16(x)
27# define le16toh(x) OSSwapLittleToHostInt16(x)
28
29# define htobe32(x) OSSwapHostToBigInt32(x)
30# define htole32(x) OSSwapHostToLittleInt32(x)
31# define be32toh(x) OSSwapBigToHostInt32(x)
32# define le32toh(x) OSSwapLittleToHostInt32(x)
33
34# define htobe64(x) OSSwapHostToBigInt64(x)
35# define htole64(x) OSSwapHostToLittleInt64(x)
36# define be64toh(x) OSSwapBigToHostInt64(x)
37# define le64toh(x) OSSwapLittleToHostInt64(x)
38
39# define __BYTE_ORDER BYTE_ORDER
40# define __BIG_ENDIAN BIG_ENDIAN
41# define __LITTLE_ENDIAN LITTLE_ENDIAN
42# define __PDP_ENDIAN PDP_ENDIAN
43
44#elif defined(__OpenBSD__)
45
46# include <endian.h>
47
48# define __BYTE_ORDER BYTE_ORDER
49# define __BIG_ENDIAN BIG_ENDIAN
50# define __LITTLE_ENDIAN LITTLE_ENDIAN
51# define __PDP_ENDIAN PDP_ENDIAN
52
53#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
54
55# include <sys/endian.h>
56
57# define be16toh(x) betoh16(x)
58# define le16toh(x) letoh16(x)
59
60# define be32toh(x) betoh32(x)
61# define le32toh(x) letoh32(x)
62
63# define be64toh(x) betoh64(x)
64# define le64toh(x) letoh64(x)
65
66#elif defined(__WINDOWS__)
67
68# include <winsock2.h>
69# ifdef __GNUC__
70# include <sys/param.h>
71# endif
72
73# if BYTE_ORDER == LITTLE_ENDIAN
74
75# define htobe16(x) htons(x)
76# define htole16(x) (x)
77# define be16toh(x) ntohs(x)
78# define le16toh(x) (x)
79
80# define htobe32(x) htonl(x)
81# define htole32(x) (x)
82# define be32toh(x) ntohl(x)
83# define le32toh(x) (x)
84
85# define htobe64(x) htonll(x)
86# define htole64(x) (x)
87# define be64toh(x) ntohll(x)
88# define le64toh(x) (x)
89
90# elif BYTE_ORDER == BIG_ENDIAN
91
92 /* that would be xbox 360 */
93# define htobe16(x) (x)
94# define htole16(x) __builtin_bswap16(x)
95# define be16toh(x) (x)
96# define le16toh(x) __builtin_bswap16(x)
97
98# define htobe32(x) (x)
99# define htole32(x) __builtin_bswap32(x)
100# define be32toh(x) (x)
101# define le32toh(x) __builtin_bswap32(x)
102
103# define htobe64(x) (x)
104# define htole64(x) __builtin_bswap64(x)
105# define be64toh(x) (x)
106# define le64toh(x) __builtin_bswap64(x)
107
108# else
109
110# error byte order not supported
111
112# endif
113
114# define __BYTE_ORDER BYTE_ORDER
115# define __BIG_ENDIAN BIG_ENDIAN
116# define __LITTLE_ENDIAN LITTLE_ENDIAN
117# define __PDP_ENDIAN PDP_ENDIAN
118
119#elif defined(__QNXNTO__)
120
121# include <gulliver.h>
122
123# define __LITTLE_ENDIAN 1234
124# define __BIG_ENDIAN 4321
125# define __PDP_ENDIAN 3412
126
127# if defined(__BIGENDIAN__)
128
129# define __BYTE_ORDER __BIG_ENDIAN
130
131# define htobe16(x) (x)
132# define htobe32(x) (x)
133# define htobe64(x) (x)
134
135# define htole16(x) ENDIAN_SWAP16(x)
136# define htole32(x) ENDIAN_SWAP32(x)
137# define htole64(x) ENDIAN_SWAP64(x)
138
139# elif defined(__LITTLEENDIAN__)
140
141# define __BYTE_ORDER __LITTLE_ENDIAN
142
143# define htole16(x) (x)
144# define htole32(x) (x)
145# define htole64(x) (x)
146
147# define htobe16(x) ENDIAN_SWAP16(x)
148# define htobe32(x) ENDIAN_SWAP32(x)
149# define htobe64(x) ENDIAN_SWAP64(x)
150
151# else
152
153# error byte order not supported
154
155# endif
156
157# define be16toh(x) ENDIAN_BE16(x)
158# define be32toh(x) ENDIAN_BE32(x)
159# define be64toh(x) ENDIAN_BE64(x)
160# define le16toh(x) ENDIAN_LE16(x)
161# define le32toh(x) ENDIAN_LE32(x)
162# define le64toh(x) ENDIAN_LE64(x)
163
164#else
165
166# error platform not supported
167
168#endif
169
170#endif