[linux-block.git] / include / linux / crc16.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 *	crc16.h - CRC-16 routine
 *
 * Implements the standard CRC-16:
 *   Width 16
 *   Poly  0x8005 (x^16 + x^15 + x^2 + 1)
 *   Init  0
 *
 * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com>
 */

#ifndef __CRC16_H
#define __CRC16_H

#include <linux/types.h>

extern u16 const crc16_table[256];

extern u16 crc16(u16 crc, const u8 *buffer, size_t len);

static inline u16 crc16_byte(u16 crc, const u8 data)
{
	return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff];
}

#endif /* __CRC16_H */
Commit	Line	Data
40b0b3f8	1	/* SPDX-License-Identifier: GPL-2.0-only */
7657ec1f EP	2	/*
	3	* crc16.h - CRC-16 routine
	4	*
f24ec7f6	5	* Implements the standard CRC-16:
7657ec1f EP	6	* Width 16
	7	* Poly 0x8005 (x^16 + x^15 + x^2 + 1)
	8	* Init 0
	9	*
7657ec1f	10	* Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com>
7657ec1f EP	11	*/
	12
	13	#ifndef __CRC16_H
	14	#define __CRC16_H
	15
	16	#include <linux/types.h>
	17
7657ec1f EP	18	extern u16 const crc16_table[256];
	19
	20	extern u16 crc16(u16 crc, const u8 *buffer, size_t len);
	21
	22	static inline u16 crc16_byte(u16 crc, const u8 data)
	23	{
	24	return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff];
	25	}
	26
	27	#endif /* __CRC16_H */
	28