[J-u-boot.git] / lib / crc8.c

/*
 * Copyright (c) 2013 Google, Inc
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include "linux/crc8.h"

unsigned int crc8(const unsigned char *vptr, int len)
{
	const unsigned char *data = vptr;
	unsigned int crc = 0;
	int i, j;

	for (j = len; j; j--, data++) {
		crc ^= (*data << 8);
		for (i = 8; i; i--) {
			if (crc & 0x8000)
				crc ^= (0x1070 << 3);
			crc <<= 1;
		}
	}

	return (crc >> 8) & 0xff;
}
Commit	Line	Data
60d18d3f SG	1	/*
	2	* Copyright (c) 2013 Google, Inc
	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
	7	#include "linux/crc8.h"
	8
	9	unsigned int crc8(const unsigned char *vptr, int len)
	10	{
	11	const unsigned char *data = vptr;
	12	unsigned int crc = 0;
	13	int i, j;
	14
	15	for (j = len; j; j--, data++) {
	16	crc ^= (*data << 8);
	17	for (i = 8; i; i--) {
	18	if (crc & 0x8000)
	19	crc ^= (0x1070 << 3);
	20	crc <<= 1;
	21	}
	22	}
	23
	24	return (crc >> 8) & 0xff;
	25	}