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check.c revision 1.6 
      1 /*	$NetBSD: check.c,v 1.6 2005/07/01 01:12:39 jmc 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)check.c	8.1 (Berkeley) 5/31/93";
     36 #else
     37 __RCSID("$NetBSD: check.c,v 1.6 2005/07/01 01:12:39 jmc Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include "back.h"
     42 
     43 void
     44 getmove(void)
     45 {
     46 	int     i, c;
     47 
     48 	c = 0;
     49 	for (;;) {
     50 		i = checkmove(c);
     51 
     52 		switch (i) {
     53 		case -1:
     54 			if (movokay(mvlim)) {
     55 				if (tflag)
     56 					curmove(20, 0);
     57 				else
     58 					writec('\n');
     59 				for (i = 0; i < mvlim; i++)
     60 					if (h[i])
     61 						wrhit(g[i]);
     62 				nexturn();
     63 				if (*offopp == 15)
     64 					cturn *= -2;
     65 				if (tflag && pnum)
     66 					bflag = pnum;
     67 				return;
     68 			}
     69 		case -4:
     70 		case 0:
     71 			if (tflag)
     72 				refresh();
     73 			if (i != 0 && i != -4)
     74 				break;
     75 			if (tflag)
     76 				curmove(20, 0);
     77 			else
     78 				writec('\n');
     79 			writel(*Colorptr);
     80 			if (i == -4)
     81 				writel(" must make ");
     82 			else
     83 				writel(" can only make ");
     84 			writec(mvlim + '0');
     85 			writel(" move");
     86 			if (mvlim > 1)
     87 				writec('s');
     88 			writec('.');
     89 			writec('\n');
     90 			break;
     91 
     92 		case -3:
     93 			if (quit())
     94 				return;
     95 		}
     96 
     97 		if (!tflag)
     98 			proll();
     99 		else {
    100 			curmove(cturn == -1 ? 18 : 19, 39);
    101 			cline();
    102 			c = -1;
    103 		}
    104 	}
    105 }
    106 
    107 int
    108 movokay(int mv)
    109 {
    110 	int     i, m;
    111 
    112 	if (d0)
    113 		swap;
    114 
    115 	for (i = 0; i < mv; i++) {
    116 		if (p[i] == g[i]) {
    117 			moverr(i);
    118 			curmove(20, 0);
    119 			writel("Attempt to move to same location.\n");
    120 			return (0);
    121 		}
    122 		if (cturn * (g[i] - p[i]) < 0) {
    123 			moverr(i);
    124 			curmove(20, 0);
    125 			writel("Backwards move.\n");
    126 			return (0);
    127 		}
    128 		if (abs(board[bar]) && p[i] != bar) {
    129 			moverr(i);
    130 			curmove(20, 0);
    131 			writel("Men still on bar.\n");
    132 			return (0);
    133 		}
    134 		if ((m = makmove(i))) {
    135 			moverr(i);
    136 			switch (m) {
    137 
    138 			case 1:
    139 				writel("Move not rolled.\n");
    140 				break;
    141 
    142 			case 2:
    143 				writel("Bad starting position.\n");
    144 				break;
    145 
    146 			case 3:
    147 				writel("Destination occupied.\n");
    148 				break;
    149 
    150 			case 4:
    151 				writel("Can't remove men yet.\n");
    152 			}
    153 			return (0);
    154 		}
    155 	}
    156 	return (1);
    157 }
    158