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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)back.h      8.1 (Berkeley) 5/31/93
  34  * $DragonFly: src/games/backgammon/common_source/back.h,v 1.2 2006/08/08 16:36:11 pavalos Exp $
  35  */
  36
  37 #include <sgtty.h>
  38 #include <stdlib.h>
  39 #include <unistd.h>
  40
  41 #define rnum(r) (random()%r)
  42 #define D0      dice[0]
  43 #define D1      dice[1]
  44 #define swap    {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;}
  45
  46 /*
  47  *
  48  * Some numerical conventions:
  49  *
  50  *      Arrays have white's value in [0], red in [1].
  51  *      Numeric values which are one color or the other use
  52  *      -1 for white, 1 for red.
  53  *      Hence, white will be negative values, red positive one.
  54  *      This makes a lot of sense since white is going in decending
  55  *      order around the board, and red is ascending.
  56  *
  57  */
  58
  59 extern const char       EXEC[]; /* object for main program */
  60 extern const char       TEACH[];/* object for tutorial program */
  61
  62 extern int      pnum;           /* color of player:
  63                                         -1 = white
  64                                          1 = red
  65                                          0 = both
  66                                          2 = not yet init'ed */
  67 extern char     *args[16];      /* args passed to teachgammon and back */
  68 extern int      acnt;           /* number of args */
  69 extern int      aflag;          /* flag to ask for rules or instructions */
  70 extern int      bflag;          /* flag for automatic board printing */
  71 extern int      cflag;          /* case conversion flag */
  72 extern int      hflag;          /* flag for cleaning screen */
  73 extern int      mflag;          /* backgammon flag */
  74 extern int      raflag;         /* 'roll again' flag for recovered game */
  75 extern int      rflag;          /* recovered game flag */
  76 extern int      tflag;          /* cursor addressing flag */
  77 extern int      rfl;            /* saved value of rflag */
  78 extern int      iroll;          /* special flag for inputting rolls */
  79 extern int      board[26];      /* board:  negative values are white,
  80                                    positive are red */
  81 extern int      dice[2];        /* value of dice */
  82 extern int      mvlim;          /* 'move limit':  max. number of moves */
  83 extern int      mvl;            /* working copy of mvlim */
  84 extern int      p[5];           /* starting position of moves */
  85 extern int      g[5];           /* ending position of moves (goals) */
  86 extern int      h[4];           /* flag for each move if a man was hit */
  87 extern int      cturn;          /* whose turn it currently is:
  88                                         -1 = white
  89                                          1 = red
  90                                          0 = just quitted
  91                                         -2 = white just lost
  92                                          2 = red just lost */
  93 extern int      d0;             /* flag if dice have been reversed from
  94                                    original position */
  95 extern int      table[6][6];    /* odds table for possible rolls */
  96 extern int      rscore;         /* red's score */
  97 extern int      wscore;         /* white's score */
  98 extern int      gvalue;         /* value of game (64 max.) */
  99 extern int      dlast;          /* who doubled last (0 = neither) */
 100 extern int      bar;            /* position of bar for current player */
 101 extern int      home;           /* position of home for current player */
 102 extern int      off[2];         /* number of men off board */
 103 extern int      *offptr;        /* pointer to off for current player */
 104 extern int      *offopp;        /* pointer to off for opponent */
 105 extern int      in[2];          /* number of men in inner table */
 106 extern int      *inptr;         /* pointer to in for current player */
 107 extern int      *inopp;         /* pointer to in for opponent */
 108
 109 extern int      ncin;           /* number of characters in cin */
 110 extern char     cin[100];       /* input line of current move
 111                                    (used for reconstructing input after
 112                                    a backspace) */
 113
 114 extern const char       *const color[];
 115                                 /* colors as strings */
 116 extern const char *const *colorptr;     /* color of current player */
 117 extern const char *const *Colorptr;     /* color of current player, capitalized */
 118 extern int      colen;          /* length of color of current player */
 119
 120 extern struct sgttyb    tty;    /* tty information buffer */
 121 extern int              old;    /* original tty status */
 122 extern int              noech;  /* original tty status without echo */
 123 extern int              raw;    /* raw tty status, no echo */
 124
 125 extern int      curr;           /* row position of cursor */
 126 extern int      curc;           /* column position of cursor */
 127 extern int      begscr;         /* 'beginning' of screen
 128                                    (not including board) */
 129
 130 int     movallow(void);
 131
 132 void    wrboard(void);
 133
 134 void    getmove(void);
 135 int     movokay(int);
 136
 137 void    fboard(void);
 138 void    refresh(void);
 139 void    curmove(int, int);
 140 void    newpos(void);
 141 void    clear(void);
 142 void    fancyc(char);
 143 void    clend(void);
 144 void    cline(void);
 145 int     getcaps(const char *);
 146
 147 void    odds(int, int, int);
 148 int     count(void);
 149 int     canhit(int, int);
 150
 151 int     makmove(int);
 152 void    moverr(int);
 153 void    movback(int);
 154 void    backone(int);
 155
 156 void    save(int);
 157 void    recover(const char *);
 158
 159 void    errexit(const char *);
 160 int     addbuf(int);
 161 void    buflush(void);
 162 char    readc(void);
 163 void    writec(char);
 164 void    writel(const char *);
 165 void    proll(void);
 166 void    wrint(int);
 167 void    gwrite(void);
 168 int     quit(void);
 169 int     yorn(char);
 170 void    wrhit(int);
 171 void    nexturn(void);
 172 void    getarg(int, char **);
 173 void    init(void);
 174 void    wrscore(void);
 175 void    fixtty(int);
 176 void    getout(void);           /* function to exit backgammon cleanly */
 177 void    roll(void);
 178
 179 int     checkmove(int);
 180
 181 void    dble(void);
 182 int     dblgood(void);
 183 int     freemen(int);
 184 int     trapped(int, int);
 185
 186 void    move(int);
 187
 188 #ifdef  TEACHGAMMON_TEXT
 189 int     text(const char *const *);
 190 #else
 191 void    text(const char *const *);
 192 #endif