29 lines
615 B
C
29 lines
615 B
C
|
/*
|
||
|
|
* crc-itu-t.h - CRC ITU-T V.41 routine
|
||
|
|
*
|
||
|
|
* Implements the standard CRC ITU-T V.41:
|
||
|
|
* Width 16
|
||
|
|
* Poly 0x0x1021 (x^16 + x^12 + x^15 + 1)
|
||
|
|
* Init 0
|
||
|
|
*
|
||
|
|
* This source code is licensed under the GNU General Public License,
|
||
|
|
* Version 2. See the file COPYING for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef CRC_ITU_T_H
|
||
|
|
#define CRC_ITU_T_H
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
extern u16 const crc_itu_t_table[256];
|
||
|
|
|
||
|
|
extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len);
|
||
|
|
|
||
|
|
static inline u16 crc_itu_t_byte(u16 crc, const u8 data)
|
||
|
|
{
|
||
|
|
return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff];
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CRC_ITU_T_H */
|
||
|
|
|