Home | History | Annotate | Line # | Download | only in common_source
one.c revision 1.4 
      1 /*	$NetBSD: one.c,v 1.4 1997/10/10 08:59:47 lukem Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 1993
      5  *	The Regents of the University of California.  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 the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)one.c	8.1 (Berkeley) 5/31/93";
     40 #else
     41 __RCSID("$NetBSD: one.c,v 1.4 1997/10/10 08:59:47 lukem Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include "back.h"
     46 
     47 int
     48 makmove(i)
     49 	int     i;
     50 {
     51 	int     n, d;
     52 	int     max;
     53 
     54 	d = d0;
     55 	n = abs(g[i] - p[i]);
     56 	max = (*offptr < 0 ? 7 : last());
     57 	if (board[p[i]] * cturn <= 0)
     58 		return (checkd(d) + 2);
     59 	if (g[i] != home && board[g[i]] * cturn < -1)
     60 		return (checkd(d) + 3);
     61 	if (i || D0 == D1) {
     62 		if (n == max ? D1 < n : D1 != n)
     63 			return (checkd(d) + 1);
     64 	} else {
     65 		if (n == max ? D0 < n && D1 < n : D0 != n && D1 != n)
     66 			return (checkd(d) + 1);
     67 		if (n == max ? D0 < n : D0 != n) {
     68 			if (d0)
     69 				return (checkd(d) + 1);
     70 			swap;
     71 		}
     72 	}
     73 	if (g[i] == home && *offptr < 0)
     74 		return (checkd(d) + 4);
     75 	h[i] = 0;
     76 	board[p[i]] -= cturn;
     77 	if (g[i] != home) {
     78 		if (board[g[i]] == -cturn) {
     79 			board[home] -= cturn;
     80 			board[g[i]] = 0;
     81 			h[i] = 1;
     82 			if (abs(bar - g[i]) < 7) {
     83 				(*inopp)--;
     84 				if (*offopp >= 0)
     85 					*offopp -= 15;
     86 			}
     87 		}
     88 		board[g[i]] += cturn;
     89 		if (abs(home - g[i]) < 7 && abs(home - p[i]) > 6) {
     90 			(*inptr)++;
     91 			if (*inptr + *offptr == 0)
     92 				*offptr += 15;
     93 		}
     94 	} else {
     95 		(*offptr)++;
     96 		(*inptr)--;
     97 	}
     98 	return (0);
     99 }
    100 
    101 void
    102 moverr(i)
    103 	int     i;
    104 {
    105 	int     j;
    106 
    107 	if (tflag)
    108 		curmove(20, 0);
    109 	else
    110 		writec('\n');
    111 	writel("Error:  ");
    112 	for (j = 0; j <= i; j++) {
    113 		wrint(p[j]);
    114 		writec('-');
    115 		wrint(g[j]);
    116 		if (j < i)
    117 			writec(',');
    118 	}
    119 	writel("... ");
    120 	movback(i);
    121 }
    122 
    123 
    124 int
    125 checkd(d)
    126 	int     d;
    127 {
    128 	if (d0 != d)
    129 		swap;
    130 	return (0);
    131 }
    132 
    133 int
    134 last()
    135 {
    136 	int     i;
    137 
    138 	for (i = home - 6 * cturn; i != home; i += cturn)
    139 		if (board[i] * cturn > 0)
    140 			return (abs(home - i));
    141 	return (-1);
    142 }
    143 
    144 void
    145 movback(i)
    146 	int     i;
    147 {
    148 	int     j;
    149 
    150 	for (j = i - 1; j >= 0; j--)
    151 		backone(j);
    152 }
    153 
    154 void
    155 backone(i)
    156 	int     i;
    157 {
    158 	board[p[i]] += cturn;
    159 	if (g[i] != home) {
    160 		board[g[i]] -= cturn;
    161 		if (abs(g[i] - home) < 7 && abs(p[i] - home) > 6) {
    162 			(*inptr)--;
    163 			if (*inptr + *offptr < 15 && *offptr >= 0)
    164 				*offptr -= 15;
    165 		}
    166 	} else {
    167 		(*offptr)--;
    168 		(*inptr)++;
    169 	}
    170 	if (h[i]) {
    171 		board[home] += cturn;
    172 		board[g[i]] = -cturn;
    173 		if (abs(bar - g[i]) < 7) {
    174 			(*inopp)++;
    175 			if (*inopp + *offopp == 0)
    176 				*offopp += 15;
    177 		}
    178 	}
    179 }
    180