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2b1f4228 1//-----------------------------------------------------------------------------
2// This code is licensed to you under the terms of the GNU GPL, version 2 or,
3// at your option, any later version. See the LICENSE.txt file for the text of
4// the license.
5//-----------------------------------------------------------------------------
6// Generic CRC calculation code.
7//-----------------------------------------------------------------------------
8
9#ifndef __PARITY_H
10#define __PARITY_H
11
12#include <stdint.h>
13
14extern const uint8_t OddByteParity[256];
15
b351374c 16static inline uint8_t oddparity8(uint8_t bt)
17{
18 return OddByteParity[bt];
19}
2b1f4228 20
21
22extern const uint8_t EvenByteParity[256];
23
b351374c 24static inline uint8_t evenparity8(const uint8_t bt)
25{
26 return EvenByteParity[bt];
2b1f4228 27}
28
29
a531720a 30static inline uint8_t evenparity32(uint32_t x)
2b1f4228 31{
32 x ^= x >> 16;
33 x ^= x >> 8;
34 return EvenByteParity[x & 0xff];
35}
36
37
38#endif /* __PARITY_H */
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