mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-11 10:14:34 +08:00
38 lines
897 B
C
38 lines
897 B
C
//-----------------------------------------------------------------------------
|
|
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
|
|
// at your option, any later version. See the LICENSE.txt file for the text of
|
|
// the license.
|
|
//-----------------------------------------------------------------------------
|
|
// Generic CRC calculation code.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#ifndef __PARITY_H
|
|
#define __PARITY_H
|
|
|
|
#include <stdint.h>
|
|
|
|
extern const uint8_t OddByteParity[256];
|
|
|
|
static inline uint8_t oddparity8(uint8_t bt)
|
|
{
|
|
return OddByteParity[bt];
|
|
}
|
|
|
|
|
|
extern const uint8_t EvenByteParity[256];
|
|
|
|
static inline uint8_t evenparity8(const uint8_t bt)
|
|
{
|
|
return EvenByteParity[bt];
|
|
}
|
|
|
|
|
|
static inline uint8_t evenparity32(uint32_t x)
|
|
{
|
|
x ^= x >> 16;
|
|
x ^= x >> 8;
|
|
return EvenByteParity[x & 0xff];
|
|
}
|
|
|
|
|
|
#endif /* __PARITY_H */
|