games/backgammon/teachgammon/tutor.c

   1 /*-
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)tutor.c  8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/backgammon/teachgammon/tutor.c,v 1.5 1999/11/30 03:48:31 billf Exp $
  31  * $DragonFly: src/games/backgammon/teachgammon/tutor.c,v 1.3 2006/08/08 16:36:11 pavalos Exp $
  32  */
  33
  34 #include "back.h"
  35 #include "tutor.h"
  36
  37 static void     clrest(void);
  38 static int      brdeq(const int *, const int *);
  39
  40 static const char better[] = "That is a legal move, but there is a better one.\n";
  41
  42 void
  43 tutor(void)
  44 {
  45         int i, j;
  46
  47         i = 0;
  48         begscr = 18;
  49         cturn = -1;
  50         home = 0;
  51         bar = 25;
  52         inptr = &in[0];
  53         inopp = &in[1];
  54         offptr = &off[0];
  55         offopp = &off[1];
  56         Colorptr = &color[0];
  57         colorptr = &color[2];
  58         colen = 5;
  59         wrboard();
  60
  61         while (1) {
  62                 if (!brdeq(test[i].brd, board)) {
  63                         if (tflag && curr == 23)
  64                                 curmove(18, 0);
  65                         writel(better);
  66                         nexturn();
  67                         movback(mvlim);
  68                         if (tflag) {
  69                                 refresh();
  70                                 clrest();
  71                         }
  72                         if ((!tflag) || curr == 19) {
  73                                 proll();
  74                                 writec('\t');
  75                         } else
  76                                 curmove(curr > 19 ? curr - 2 : curr + 4, 25);
  77                         getmove();
  78                         if (cturn == 0)
  79                                 leave();
  80                         continue;
  81                 }
  82                 if (tflag)
  83                         curmove(18, 0);
  84                 text(*test[i].com);
  85                 if (!tflag)
  86                         writec('\n');
  87                 if (i == maxmoves)
  88                         break;
  89                 D0 = test[i].roll1;
  90                 D1 = test[i].roll2;
  91                 d0 = 0;
  92                 mvlim = 0;
  93                 for (j = 0; j < 4; j++) {
  94                         if (test[i].mp[j] == test[i].mg[j])
  95                                 break;
  96                         p[j] = test[i].mp[j];
  97                         g[j] = test[i].mg[j];
  98                         mvlim++;
  99                 }
 100                 if (mvlim)
 101                         for (j = 0; j < mvlim; j++)
 102                                 if (makmove(j))
 103                                         writel("AARGH!!!\n");
 104                 if (tflag)
 105                         refresh();
 106                 nexturn();
 107                 D0 = test[i].new1;
 108                 D1 = test[i].new2;
 109                 d0 = 0;
 110                 i++;
 111                 mvlim = movallow();
 112                 if (mvlim) {
 113                         if (tflag)
 114                                 clrest();
 115                         proll();
 116                         writec('\t');
 117                         getmove();
 118                         if (tflag)
 119                                 refresh();
 120                         if (cturn == 0)
 121                                 leave();
 122                 }
 123         }
 124         leave();
 125 }
 126
 127 static void
 128 clrest(void)
 129 {
 130         int r, c, j;
 131
 132         r = curr;
 133         c = curc;
 134         for (j = r + 1; j < 24; j++) {
 135                 curmove(j, 0);
 136                 cline();
 137         }
 138         curmove(r, c);
 139 }
 140
 141 static int
 142 brdeq(const int *b1, const int *b2)
 143 {
 144         const int *e;
 145
 146         e = b1 + 26;
 147         while (b1 < e)
 148                 if (*b1++ != *b2++)
 149                         return (0);
 150         return (1);
 151 }