sbc_crc.c revision 1.2 
1/* $NetBSD: sbc_crc.c,v 1.2 2017/01/30 14:55:17 jakllsch 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()
38{
39	int j, i, k, numbits;
40	unsigned int data;
41
42	printf("/* sbc_crc.h - Automatically generated by sbc_crc.c. */\n\n");
43
44	/* The CRC-8 polynomial this uses is 0x11D */
45
46	numbits = 8;
47	for (k = 0; k < 2; k++) {
48		printf("static const uint8_t sbc_crc%d[256] = {\n    ",numbits);
49		for (i = 0; i < 256; i++) {
50			data = i;
51
52			for (j = 0; j < numbits; j++) {
53				if (data & 0x80){
54					data = data << 1;
55					data = (data ^ 0x1d);
56				} else
57					data = data << 1;
58			}
59
60			if (i % 8 == 0 && i != 0)
61				printf("\n    ");
62
63			printf("0x%02x, ",data & 0xff);
64		}
65		printf("\n};\n\n");
66
67		numbits = 4;
68	}
69	return 0;
70}
71