/* SPDX-License-Identifier: GPL-2.0-only */ | |
/* | |
* crc-itu-t.h - CRC ITU-T V.41 routine | |
* | |
* Implements the standard CRC ITU-T V.41: | |
* Width 16 | |
* Poly 0x1021 (x^16 + x^12 + x^15 + 1) | |
* Init 0 | |
*/ | |
#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 */ | |