games/backgammon/common_source/back.h

   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  *      @(#)back.h      8.1 (Berkeley) 5/31/93
  30  */
  31
  32 #include <termios.h>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35
  36 #define rnum(r) (random()%r)
  37 #define D0      dice[0]
  38 #define D1      dice[1]
  39 #define swap    {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;}
  40
  41 /*
  42  *
  43  * Some numerical conventions:
  44  *
  45  *      Arrays have white's value in [0], red in [1].
  46  *      Numeric values which are one color or the other use
  47  *      -1 for white, 1 for red.
  48  *      Hence, white will be negative values, red positive one.
  49  *      This makes a lot of sense since white is going in descending
  50  *      order around the board, and red is ascending.
  51  *
  52  */
  53
  54 extern const char       EXEC[]; /* object for main program */
  55 extern const char       TEACH[];/* object for tutorial program */
  56
  57 extern int      pnum;           /* color of player:
  58                                         -1 = white
  59                                          1 = red
  60                                          0 = both
  61                                          2 = not yet init'ed */
  62 extern char     *args[16];      /* args passed to teachgammon and back */
  63 extern int      acnt;           /* number of args */
  64 extern int      aflag;          /* flag to ask for rules or instructions */
  65 extern int      bflag;          /* flag for automatic board printing */
  66 extern int      cflag;          /* case conversion flag */
  67 extern int      hflag;          /* flag for cleaning screen */
  68 extern int      mflag;          /* backgammon flag */
  69 extern int      raflag;         /* 'roll again' flag for recovered game */
  70 extern int      rflag;          /* recovered game flag */
  71 extern int      tflag;          /* cursor addressing flag */
  72 extern int      rfl;            /* saved value of rflag */
  73 extern int      iroll;          /* special flag for inputting rolls */
  74 extern int      board[26];      /* board:  negative values are white,
  75                                    positive are red */
  76 extern int      dice[2];        /* value of dice */
  77 extern int      mvlim;          /* 'move limit':  max. number of moves */
  78 extern int      mvl;            /* working copy of mvlim */
  79 extern int      p[5];           /* starting position of moves */
  80 extern int      g[5];           /* ending position of moves (goals) */
  81 extern int      h[4];           /* flag for each move if a man was hit */
  82 extern int      cturn;          /* whose turn it currently is:
  83                                         -1 = white
  84                                          1 = red
  85                                          0 = just quitted
  86                                         -2 = white just lost
  87                                          2 = red just lost */
  88 extern int      d0;             /* flag if dice have been reversed from
  89                                    original position */
  90 extern int      table[6][6];    /* odds table for possible rolls */
  91 extern int      rscore;         /* red's score */
  92 extern int      wscore;         /* white's score */
  93 extern int      gvalue;         /* value of game (64 max.) */
  94 extern int      dlast;          /* who doubled last (0 = neither) */
  95 extern int      bar;            /* position of bar for current player */
  96 extern int      home;           /* position of home for current player */
  97 extern int      off[2];         /* number of men off board */
  98 extern int      *offptr;        /* pointer to off for current player */
  99 extern int      *offopp;        /* pointer to off for opponent */
 100 extern int      in[2];          /* number of men in inner table */
 101 extern int      *inptr;         /* pointer to in for current player */
 102 extern int      *inopp;         /* pointer to in for opponent */
 103
 104 extern int      ncin;           /* number of characters in cin */
 105 extern char     cin[100];       /* input line of current move
 106                                    (used for reconstructing input after
 107                                    a backspace) */
 108
 109 extern const char       *const color[];
 110                                 /* colors as strings */
 111 extern const char *const *colorptr;     /* color of current player */
 112 extern const char *const *Colorptr;     /* color of current player, capitalized */
 113 extern int      colen;          /* length of color of current player */
 114
 115 extern struct termios   tty;    /* tty information buffer */
 116 extern int              old;    /* original tty status */
 117 extern int              noech;  /* original tty status without echo */
 118 extern int              bgraw;  /* raw tty status, no echo */
 119
 120 extern int      curr;           /* row position of cursor */
 121 extern int      curc;           /* column position of cursor */
 122 extern int      begscr;         /* 'beginning' of screen
 123                                    (not including board) */
 124
 125 int     addbuf(int);
 126 void    backone(int);
 127 void    buflush(void);
 128 int     canhit(int, int);
 129 int     checkmove(int);
 130 void    clear(void);
 131 void    clend(void);
 132 void    cline(void);
 133 int     count(void);
 134 void    curmove(int, int);
 135 void    dble(void);
 136 int     dblgood(void);
 137 void    errexit(const char *) __dead2;
 138 void    fancyc(char);
 139 void    fboard(void);
 140 void    fixtty(int);
 141 int     freemen(int);
 142 void    getarg(int, char **);
 143 int     getcaps(const char *);
 144 void    getmove(void);
 145 void    getout(int) __dead2;    /* function to exit backgammon cleanly */
 146 void    gwrite(void);
 147 void    init(void);
 148 int     makmove(int);
 149 int     movallow(void);
 150 void    movback(int);
 151 void    move(int);
 152 void    moverr(int);
 153 int     movokay(int);
 154 void    newpos(void);
 155 void    nexturn(void);
 156 void    odds(int, int, int);
 157 void    proll(void);
 158 int     quit(void);
 159 char    readc(void);
 160 void    recover(const char *);
 161 void    refresh(void);
 162 void    roll(void);
 163 void    save(int);
 164 #ifdef  TEACHGAMMON_TEXT
 165 int     text(const char *const *);
 166 #else
 167 void    text(const char *const *);
 168 #endif
 169 int     trapped(int, int);
 170 void    wrboard(void);
 171 void    wrhit(int);
 172 void    wrint(int);
 173 void    writec(char);
 174 void    writel(const char *);
 175 void    wrscore(void);
 176 int     yorn(char);