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check.c revision 1.4 
      1 /*	$NetBSD: check.c,v 1.4 1997/10/10 08:59:44 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[] = "@(#)check.c	8.1 (Berkeley) 5/31/93";
     40 #else
     41 __RCSID("$NetBSD: check.c,v 1.4 1997/10/10 08:59:44 lukem Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include "back.h"
     46 
     47 void
     48 getmove()
     49 {
     50 	int     i, c;
     51 
     52 	c = 0;
     53 	for (;;) {
     54 		i = checkmove(c);
     55 
     56 		switch (i) {
     57 		case -1:
     58 			if (movokay(mvlim)) {
     59 				if (tflag)
     60 					curmove(20, 0);
     61 				else
     62 					writec('\n');
     63 				for (i = 0; i < mvlim; i++)
     64 					if (h[i])
     65 						wrhit(g[i]);
     66 				nexturn();
     67 				if (*offopp == 15)
     68 					cturn *= -2;
     69 				if (tflag && pnum)
     70 					bflag = pnum;
     71 				return;
     72 			}
     73 		case -4:
     74 		case 0:
     75 			if (tflag)
     76 				refresh();
     77 			if (i != 0 && i != -4)
     78 				break;
     79 			if (tflag)
     80 				curmove(20, 0);
     81 			else
     82 				writec('\n');
     83 			writel(*Colorptr);
     84 			if (i == -4)
     85 				writel(" must make ");
     86 			else
     87 				writel(" can only make ");
     88 			writec(mvlim + '0');
     89 			writel(" move");
     90 			if (mvlim > 1)
     91 				writec('s');
     92 			writec('.');
     93 			writec('\n');
     94 			break;
     95 
     96 		case -3:
     97 			if (quit())
     98 				return;
     99 		}
    100 
    101 		if (!tflag)
    102 			proll();
    103 		else {
    104 			curmove(cturn == -1 ? 18 : 19, 39);
    105 			cline();
    106 			c = -1;
    107 		}
    108 	}
    109 }
    110 
    111 int
    112 movokay(mv)
    113 	int     mv;
    114 {
    115 	int     i, m;
    116 
    117 	if (d0)
    118 		swap;
    119 
    120 	for (i = 0; i < mv; i++) {
    121 		if (p[i] == g[i]) {
    122 			moverr(i);
    123 			curmove(20, 0);
    124 			writel("Attempt to move to same location.\n");
    125 			return (0);
    126 		}
    127 		if (cturn * (g[i] - p[i]) < 0) {
    128 			moverr(i);
    129 			curmove(20, 0);
    130 			writel("Backwards move.\n");
    131 			return (0);
    132 		}
    133 		if (abs(board[bar]) && p[i] != bar) {
    134 			moverr(i);
    135 			curmove(20, 0);
    136 			writel("Men still on bar.\n");
    137 			return (0);
    138 		}
    139 		if ((m = makmove(i))) {
    140 			moverr(i);
    141 			switch (m) {
    142 
    143 			case 1:
    144 				writel("Move not rolled.\n");
    145 				break;
    146 
    147 			case 2:
    148 				writel("Bad starting position.\n");
    149 				break;
    150 
    151 			case 3:
    152 				writel("Destination occupied.\n");
    153 				break;
    154 
    155 			case 4:
    156 				writel("Can't remove men yet.\n");
    157 			}
    158 			return (0);
    159 		}
    160 	}
    161 	return (1);
    162 }
    163