games/backgammon/common_source/back.h

   1 /*      $NetBSD: back.h,v 1.15 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  *      @(#)back.h      8.1 (Berkeley) 5/31/93
  32  */
  33
  34 #include <sys/types.h>
  35 #include <sys/uio.h>
  36
  37 #include <fcntl.h>
  38 #include <signal.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <termios.h>
  43 #include <termcap.h>
  44 #include <unistd.h>
  45
  46 #define rnum(r) (random()%r)
  47 #define D0      dice[0]
  48 #define D1      dice[1]
  49 #define swap    {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;}
  50
  51 /*
  52  *
  53  * Some numerical conventions:
  54  *
  55  *      Arrays have white's value in [0], red in [1].
  56  *      Numeric values which are one color or the other use
  57  *      -1 for white, 1 for red.
  58  *      Hence, white will be negative values, red positive one.
  59  *      This makes a lot of sense since white is going in decending
  60  *      order around the board, and red is ascending.
  61  *
  62  */
  63
  64 extern  const char      EXEC[];         /* object for main program */
  65 extern  const char      TEACH[];        /* object for tutorial program */
  66
  67 extern  int     pnum;           /* color of player:
  68                                         -1 = white
  69                                          1 = red
  70                                          0 = both
  71                                          2 = not yet init'ed */
  72 extern  char    args[100];      /* args passed to teachgammon and back */
  73 extern  int     acnt;           /* length of args */
  74 extern  int     aflag;          /* flag to ask for rules or instructions */
  75 extern  int     bflag;          /* flag for automatic board printing */
  76 extern  int     cflag;          /* case conversion flag */
  77 extern  int     hflag;          /* flag for cleaning screen */
  78 extern  int     mflag;          /* backgammon flag */
  79 extern  int     raflag;         /* 'roll again' flag for recovered game */
  80 extern  int     rflag;          /* recovered game flag */
  81 extern  int     tflag;          /* cursor addressing flag */
  82 extern  int     rfl;            /* saved value of rflag */
  83 extern  int     iroll;          /* special flag for inputting rolls */
  84 extern  int     board[26];      /* board:  negative values are white,
  85                                    positive are red */
  86 extern  int     dice[2];        /* value of dice */
  87 extern  int     mvlim;          /* 'move limit':  max. number of moves */
  88 extern  int     mvl;            /* working copy of mvlim */
  89 extern  int     p[5];           /* starting position of moves */
  90 extern  int     g[5];           /* ending position of moves (goals) */
  91 extern  int     h[4];           /* flag for each move if a man was hit */
  92 extern  int     cturn;          /* whose turn it currently is:
  93                                         -1 = white
  94                                          1 = red
  95                                          0 = just quitted
  96                                         -2 = white just lost
  97                                          2 = red just lost */
  98 extern  int     d0;             /* flag if dice have been reversed from
  99                                    original position */
 100 extern  int     table[6][6];    /* odds table for possible rolls */
 101 extern  int     rscore;         /* red's score */
 102 extern  int     wscore;         /* white's score */
 103 extern  int     gvalue;         /* value of game (64 max.) */
 104 extern  int     dlast;          /* who doubled last (0 = neither) */
 105 extern  int     bar;            /* position of bar for current player */
 106 extern  int     home;           /* position of home for current player */
 107 extern  int     off[2];         /* number of men off board */
 108 extern  int     *offptr;        /* pointer to off for current player */
 109 extern  int     *offopp;        /* pointer to off for opponent */
 110 extern  int     in[2];          /* number of men in inner table */
 111 extern  int     *inptr;         /* pointer to in for current player */
 112 extern  int     *inopp;         /* pointer to in for opponent */
 113
 114 extern  int     ncin;           /* number of characters in cin */
 115 extern  char    cin[100];       /* input line of current move
 116                                    (used for reconstructing input after
 117                                    a backspace) */
 118
 119 extern  const char      *const color[];
 120                                 /* colors as strings */
 121 extern  const char      *const *colorptr;       /* color of current player */
 122 extern  const char      *const *Colorptr;       /* color of current player, capitalized */
 123 extern  int     colen;          /* length of color of current player */
 124
 125 extern  struct termios  old, noech, raw;/* original tty status */
 126
 127 extern  int     curr;           /* row position of cursor */
 128 extern  int     curc;           /* column position of cursor */
 129 extern  int     begscr;         /* 'beginning' of screen
 130                                    (not including board) */
 131
 132 int     addbuf(int);
 133 void    backone(int);
 134 void    buflush(void);
 135 int     canhit(int, int);
 136 int     checkmove(int);
 137 void    clear(void);
 138 void    clend(void);
 139 void    cline(void);
 140 int     count(void);
 141 void    curmove(int, int);
 142 void    errexit(const char *) __attribute__((__noreturn__));
 143 void    fancyc(int);
 144 void    fboard(void);
 145 void    fixtty(struct termios *);
 146 void    getarg(char ***);
 147 int     getcaps(const char *);
 148 void    getmove(void);
 149 void    getout(int) __attribute__((__noreturn__));
 150 void    gwrite(void);
 151 void    init(void);
 152 int     main(int, char *[]);
 153 int     makmove(int);
 154 int     movallow(void);
 155 void    movback(int);
 156 void    moverr(int);
 157 int     movokay(int);
 158 void    newpos(void);
 159 void    nexturn(void);
 160 void    odds(int, int, int);
 161 void    proll(void);
 162 int     quit(void);
 163 int     readc(void);
 164 void    recover(const char *);
 165 void    refresh(void);
 166 void    roll(void);
 167 void    save(int);
 168 int     text(const char *const *);
 169 void    wrboard(void);
 170 void    wrhit(int);
 171 void    wrint(int);
 172 void    writec(int);
 173 void    writel(const char *);
 174 void    wrscore(void);
 175 int     yorn(int);