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[proxmark3-svn] / client / proxendian.h
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 # ifndef BYTE_ORDER
21 # define BYTE_ORDER __BYTE_ORDER
22 # define LITTLE_ENDIAN __LITTLE_ENDIAN
23 # define BIG_ENDIAN __BIG_ENDIAN
24 # endif
25 # if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)
26 # error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
27 # endif
28 # if BYTE_ORDER == LITTLE_ENDIAN
29 # define HOST_LITTLE_ENDIAN
30 # endif
31 #endif
32
33 #ifdef HOST_LITTLE_ENDIAN
34 # define le16(x) (x)
35 # define le32(x) (x)
36 #else
37
38 static inline uint16_t le16(uint16_t v)
39 {
40 return (v>>8) | (v<<8);
41 }
42
43 static inline uint32_t le32(uint32_t v)
44 {
45 return (le16(v)<<16) | (le16(v>>16));
46 }
47 #endif // HOST_LITTLE_ENDIAN
48
49 #endif // PROXENDIAN_H__
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