linux-stable/include/linux/crc-itu-t.h

/* 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 */
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 */`
CRC ITU-T V.41 This will add the CRC calculation according to the CRC ITU-T V.41 to the kernel lib/ folder. This code has been derived from the rt2x00 driver, currently found only in the wireless-dev tree, but this library is generic and could be used by more drivers who currently use their own implementation. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Also useful for the new firewire stack. Signed-off-by: Kristian Hoegsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> 2006-06-12 14:17:04 +00:00			`/*`
			`* crc-itu-t.h - CRC ITU-T V.41 routine`
			`*`
			`* Implements the standard CRC ITU-T V.41:`
			`* Width 16`
lib: crc-itu-t.[ch] fix 0x0x prefix in integer constants Signed-off-by: Antonio Ospite <ao2@ao2.it> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> 2015-04-28 11:11:28 +00:00			`* Poly 0x1021 (x^16 + x^12 + x^15 + 1)`
CRC ITU-T V.41 This will add the CRC calculation according to the CRC ITU-T V.41 to the kernel lib/ folder. This code has been derived from the rt2x00 driver, currently found only in the wireless-dev tree, but this library is generic and could be used by more drivers who currently use their own implementation. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Also useful for the new firewire stack. Signed-off-by: Kristian Hoegsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> 2006-06-12 14:17:04 +00:00			`* 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 */`