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      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 (at) 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 
     36 int
     37 main(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