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genpar.c revision 1.8 
      1 /*	$NetBSD: genpar.c,v 1.8 2002/01/26 13:40:54 aymeric Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1993 Markus Wild
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Markus Wild.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <stdio.h>
     34 
     35 int main(void);
     36 
     37 #define BSET(i,b) ((i & (1 << b)) ? 1 : 0)
     38 
     39 int
     40 main(void)
     41 {
     42 	int i;
     43 	unsigned char par;
     44 
     45 	printf("u_char even_parity[] = {\n\t");
     46 	for (i = 0; i < 0x80; i++) {
     47 		par = BSET(i,0) + BSET(i,1) + BSET(i,2) + BSET(i,3) +
     48 		    BSET(i,4) + BSET(i,5) + BSET(i,6) + BSET(i,7);
     49 		printf("%2d, ", par & 1);
     50 		if ((i & 15) == 15)
     51 			printf("\n\t");
     52 	}
     53 	printf("};\n");
     54 	exit(0);
     55 	/* NOTREACHED */
     56 }
     57