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1 | //----------------------------------------------------------------------------- |
2 | // Copyright (C) 2010 Hector Martin "marcan" <marcan@marcansoft.com> | |
3 | // | |
4 | // This code is licensed to you under the terms of the GNU GPL, version 2 or, | |
5 | // at your option, any later version. See the LICENSE.txt file for the text of | |
6 | // the license. | |
7 | //----------------------------------------------------------------------------- | |
8 | // Endianness convenience functions | |
9 | //----------------------------------------------------------------------------- | |
10 | ||
11 | #ifndef PROXENDIAN_H__ | |
12 | #define PROXENDIAN_H__ | |
13 | ||
14 | #include <stdint.h> | |
15 | ||
16 | #ifdef WIN32 | |
17 | # define HOST_LITTLE_ENDIAN | |
18 | #else | |
19 | # include <sys/types.h> | |
20 | ||
21 | # if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN) | |
22 | # error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN | |
23 | # endif | |
24 | ||
25 | # if BYTE_ORDER == LITTLE_ENDIAN | |
26 | # define HOST_LITTLE_ENDIAN | |
27 | # endif | |
28 | #endif | |
29 | ||
30 | #ifdef HOST_LITTLE_ENDIAN | |
31 | # define le16(x) (x) | |
32 | # define le32(x) (x) | |
33 | #else | |
34 | ||
35 | static inline uint16_t le16(uint16_t v) | |
36 | { | |
37 | return (v>>8) | (v<<8); | |
38 | } | |
39 | ||
40 | static inline uint32_t le32(uint32_t v) | |
41 | { | |
42 | return (le16(v)<<16) | (le16(v>>16)); | |
43 | } | |
44 | #endif // HOST_LITTLE_ENDIAN | |
45 | ||
46 | #endif // PROXENDIAN_H__ |