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/* 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^5 + 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 */
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