sbc_crc.c revision 1.3 
1/* $NetBSD: sbc_crc.c,v 1.3 2017/01/30 15:56:44 christos Exp $ */
2
3/*-
4 * Copyright (c) 2015 Nathanial Sloss <nathanialsloss@yahoo.com.au>
5 * All rights reserved.
6 *
7 *		This software is dedicated to the memory of -
8 *	   Baron James Anlezark (Barry) - 1 Jan 1949 - 13 May 2012.
9 *
10 *		Barry was a man who loved his music.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <stdio.h>
35
36int
37main(void)
38{
39	unsigned int j, i, k, numbits, data;
40
41	printf("/* sbc_crc.h - Automatically generated by sbc_crc.c. */\n\n");
42
43	/* The CRC-8 polynomial this uses is 0x11D */
44
45	numbits = 8;
46	for (k = 0; k < 2; k++) {
47		printf("static const uint8_t sbc_crc%u[256] = {\n\t", numbits);
48		for (i = 0; i < 256; i++) {
49			data = i;
50
51			for (j = 0; j < numbits; j++) {
52				if (data & 0x80) {
53					data <<= 1;
54					data ^= 0x1d;
55				} else
56					data <<= 1;
57			}
58
59			if (i % 8 == 0 && i != 0)
60				printf("\n\t");
61
62			printf("0x%02x, ", data & 0xff);
63		}
64		printf("\n};\n\n");
65
66		numbits /= 2;
67	}
68	return 0;
69}
70