1/*
2 * crc-itu-t.h - CRC ITU-T V.41 routine
3 *
4 * Implements the standard CRC ITU-T V.41:
5 * Width 16
6 * Poly 0x1021 (x^16 + x^12 + x^15 + 1)
7 * Init 0
8 *
9 * This source code is licensed under the GNU General Public License,
10 * Version 2. See the file COPYING for more details.
11 */
12
13#ifndef CRC_ITU_T_H
14#define CRC_ITU_T_H
15
16#include <linux/types.h>
17
18extern u16 const crc_itu_t_table[256];
19
20extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len);
21
22static inline u16 crc_itu_t_byte(u16 crc, const u8 data)
23{
24 return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff];
25}
26
27#endif /* CRC_ITU_T_H */
28
29