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check.c revision 1.3 
      1 /*	$NetBSD: check.c,v 1.3 1995/03/21 15:05:36 cgd 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 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)check.c	8.1 (Berkeley) 5/31/93";
     39 #else
     40 static char rcsid[] = "$NetBSD: check.c,v 1.3 1995/03/21 15:05:36 cgd Exp $";
     41 #endif
     42 #endif /* not lint */
     43 
     44 #include "back.h"
     45 
     46 getmove ()  {
     47 	register int	i, c;
     48 
     49 	c = 0;
     50 	for (;;)  {
     51 		i = checkmove(c);
     52 
     53 		switch (i)  {
     54 		case -1:
     55 			if (movokay(mvlim))  {
     56 				if (tflag)
     57 					curmove (20,0);
     58 				else
     59 					writec ('\n');
     60 				for (i = 0; i < mvlim; i++)
     61 					if (h[i])
     62 						wrhit(g[i]);
     63 				nexturn();
     64 				if (*offopp == 15)
     65 					cturn *= -2;
     66 				if (tflag && pnum)
     67 					bflag = pnum;
     68 				return;
     69 			}
     70 
     71 		case -4:
     72 		case 0:
     73 			if (tflag)
     74 				refresh();
     75 			if (i != 0 && i != -4)
     76 				break;
     77 			if (tflag)
     78 				curmove (20,0);
     79 			else
     80 				writec ('\n');
     81 			writel (*Colorptr);
     82 			if (i == -4)
     83 				writel (" must make ");
     84 			else
     85 				writel (" can only make ");
     86 			writec (mvlim+'0');
     87 			writel (" move");
     88 			if (mvlim > 1)
     89 				writec ('s');
     90 			writec ('.');
     91 			writec ('\n');
     92 			break;
     93 
     94 		case -3:
     95 			if (quit())
     96 				return;
     97 		}
     98 
     99 		if (! tflag)
    100 			proll ();
    101 		else  {
    102 			curmove (cturn == -1? 18: 19,39);
    103 			cline ();
    104 			c = -1;
    105 		}
    106 	}
    107 }
    108 
    109 movokay (mv)
    111 register int	mv;
    112 
    113 {
    114 	register int	i, m;
    115 
    116 	if (d0)
    117 		swap;
    118 
    119 	for (i = 0; i < mv; i++)  {
    120 
    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 
    128 		if (cturn*(g[i]-p[i]) < 0)  {
    129 			moverr (i);
    130 			curmove (20,0);
    131 			writel ("Backwards move.\n");
    132 			return (0);
    133 		}
    134 
    135 		if (abs(board[bar]) && p[i] != bar)  {
    136 			moverr (i);
    137 			curmove (20,0);
    138 			writel ("Men still on bar.\n");
    139 			return (0);
    140 		}
    141 
    142 		if ( (m = makmove(i)) )  {
    143 			moverr (i);
    144 			switch (m)  {
    145 
    146 			case 1:
    147 				writel ("Move not rolled.\n");
    148 				break;
    149 
    150 			case 2:
    151 				writel ("Bad starting position.\n");
    152 				break;
    153 
    154 			case 3:
    155 				writel ("Destination occupied.\n");
    156 				break;
    157 
    158 			case 4:
    159 				writel ("Can't remove men yet.\n");
    160 			}
    161 			return (0);
    162 		}
    163 	}
    164 	return (1);
    165 }
    166