linux-stable/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 */
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 Based on 2 normalized pattern(s): this source code is licensed under the gnu general public license version 2 see the file copying for more details this source code is licensed under general public license version 2 see extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 52 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.449021192@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2019-06-03 05:44:46 +00:00			`/* SPDX-License-Identifier: GPL-2.0-only */`
[PATCH] lib/crc16: added crc16 algorithm. Add the crc16 routines, as used by w1 devices. Signed-off-by: Ben Gardner <bgardner@wabtec.com> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2005-08-17 11:17:26 +00:00			`/*`
			`* crc16.h - CRC-16 routine`
			`*`
[PATCH] crc16: remove w1 specific comments. Remove w1 comments from crc16.h and move specific constants into w1_ds2433.c where they are used. Replace %d with %zd. Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 2005-09-12 13:12:43 +00:00			`* Implements the standard CRC-16:`
[PATCH] lib/crc16: added crc16 algorithm. Add the crc16 routines, as used by w1 devices. Signed-off-by: Ben Gardner <bgardner@wabtec.com> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2005-08-17 11:17:26 +00:00			`* 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 */`