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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__
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