games/backgammon/teachgammon/tutor.c

   1 /*      $NetBSD: tutor.c,v 1.7 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[] = "@(#)tutor.c     8.1 (Berkeley) 5/31/93";
  36 #else
  37 __RCSID("$NetBSD: tutor.c,v 1.7 2005/07/01 01:12:39 jmc Exp $");
  38 #endif
  39 #endif                          /* not lint */
  40
  41 #include "back.h"
  42 #include "tutor.h"
  43
  44 static const char better[] =
  45         "That is a legal move, but there is a better one.\n";
  46
  47 static int brdeq(const int *, const int *);
  48 static void clrest(void);
  49
  50 void
  51 tutor(void)
  52 {
  53         int     i, j;
  54
  55         i = 0;
  56         begscr = 18;
  57         cturn = -1;
  58         home = 0;
  59         bar = 25;
  60         inptr = &in[0];
  61         inopp = &in[1];
  62         offptr = &off[0];
  63         offopp = &off[1];
  64         Colorptr = &color[0];
  65         colorptr = &color[2];
  66         colen = 5;
  67         wrboard();
  68
  69         while (1) {
  70                 if (!brdeq(test[i].brd, board)) {
  71                         if (tflag && curr == 23)
  72                                 curmove(18, 0);
  73                         writel(better);
  74                         nexturn();
  75                         movback(mvlim);
  76                         if (tflag) {
  77                                 refresh();
  78                                 clrest();
  79                         }
  80                         if ((!tflag) || curr == 19) {
  81                                 proll();
  82                                 writec('\t');
  83                         } else
  84                                 curmove(curr > 19 ? curr - 2 : curr + 4, 25);
  85                         getmove();
  86                         if (cturn == 0)
  87                                 leave();
  88                         continue;
  89                 }
  90                 if (tflag)
  91                         curmove(18, 0);
  92                 text(*test[i].com);
  93                 if (!tflag)
  94                         writec('\n');
  95                 if (i == maxmoves)
  96                         break;
  97                 D0 = test[i].roll1;
  98                 D1 = test[i].roll2;
  99                 d0 = 0;
 100                 mvlim = 0;
 101                 for (j = 0; j < 4; j++) {
 102                         if (test[i].mp[j] == test[i].mg[j])
 103                                 break;
 104                         p[j] = test[i].mp[j];
 105                         g[j] = test[i].mg[j];
 106                         mvlim++;
 107                 }
 108                 if (mvlim)
 109                         for (j = 0; j < mvlim; j++)
 110                                 if (makmove(j))
 111                                         writel("AARGH!!!\n");
 112                 if (tflag)
 113                         refresh();
 114                 nexturn();
 115                 D0 = test[i].new1;
 116                 D1 = test[i].new2;
 117                 d0 = 0;
 118                 i++;
 119                 mvlim = movallow();
 120                 if (mvlim) {
 121                         if (tflag)
 122                                 clrest();
 123                         proll();
 124                         writec('\t');
 125                         getmove();
 126                         if (tflag)
 127                                 refresh();
 128                         if (cturn == 0)
 129                                 leave();
 130                 }
 131         }
 132         leave();
 133 }
 134
 135 static void
 136 clrest(void)
 137 {
 138         int     r, c, j;
 139
 140         r = curr;
 141         c = curc;
 142         for (j = r + 1; j < 24; j++) {
 143                 curmove(j, 0);
 144                 cline();
 145         }
 146         curmove(r, c);
 147 }
 148
 149 static int
 150 brdeq(const int *b1, const int *b2)
 151 {
 152         const int    *e;
 153
 154         e = b1 + 26;
 155         while (b1 < e)
 156                 if (*b1++ != *b2++)
 157                         return (0);
 158         return (1);
 159 }