[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / crc-itu-t.h

/*
 *	crc-itu-t.h - CRC ITU-T V.41 routine
 *
 * Implements the standard CRC ITU-T V.41:
 *   Width 16
 *   Poly  0x0x1021 (x^16 + x^12 + x^15 + 1)
 *   Init  0
 *
 * This source code is licensed under the GNU General Public License,
 * Version 2. See the file COPYING for more details.
 */

#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 */
Commit	Line	Data
3e7cbae7 ID	1	/*
	2	* crc-itu-t.h - CRC ITU-T V.41 routine
	3	*
	4	* Implements the standard CRC ITU-T V.41:
	5	* Width 16
	6	* Poly 0x0x1021 (x^16 + x^12 + x^15 + 1)
	7	* Init 0
	8	*
	9	* This source code is licensed under the GNU General Public License,
	10	* Version 2. See the file COPYING for more details.
	11	*/
	12
	13	#ifndef CRC_ITU_T_H
	14	#define CRC_ITU_T_H
	15
	16	#include <linux/types.h>
	17
	18	extern u16 const crc_itu_t_table[256];
	19
	20	extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len);
	21
	22	static inline u16 crc_itu_t_byte(u16 crc, const u8 data)
	23	{
	24	return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff];
	25	}
	26
	27	#endif /* CRC_ITU_T_H */
	28