usr/src/games/backgammon/back.h


/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)back.h      5.1 (Berkeley) 5/29/85
 */

#include <sgtty.h>

#define rnum(r) (random()%r)
#define D0      dice[0]
#define D1      dice[1]
#define swap    {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;}

/*
 *
 * Some numerical conventions:
 *
 *      Arrays have white's value in [0], red in [1].
 *      Numeric values which are one color or the other use
 *      -1 for white, 1 for red.
 *      Hence, white will be negative values, red positive one.
 *      This makes a lot of sense since white is going in decending
 *      order around the board, and red is ascending.
 *
 */

char    EXEC[];                 /* object for main program */
char    TEACH[];                /* object for tutorial program */

int     pnum;                   /* color of player:
                                        -1 = white
                                         1 = red
                                         0 = both
                                         2 = not yet init'ed */
char    args[100];              /* args passed to teachgammon and back */
int     acnt;                   /* length of args */
int     aflag;                  /* flag to ask for rules or instructions */
int     bflag;                  /* flag for automatic board printing */
int     cflag;                  /* case conversion flag */
int     hflag;                  /* flag for cleaning screen */
int     mflag;                  /* backgammon flag */
int     raflag;                 /* 'roll again' flag for recovered game */
int     rflag;                  /* recovered game flag */
int     tflag;                  /* cursor addressing flag */
int     rfl;                    /* saved value of rflag */
int     iroll;                  /* special flag for inputting rolls */
int     board[26];              /* board:  negative values are white,
                                   positive are red */
int     dice[2];                /* value of dice */
int     mvlim;                  /* 'move limit':  max. number of moves */
int     mvl;                    /* working copy of mvlim */
int     p[5];                   /* starting position of moves */
int     g[5];                   /* ending position of moves (goals) */
int     h[4];                   /* flag for each move if a man was hit */
int     cturn;                  /* whose turn it currently is:
                                        -1 = white
                                         1 = red
                                         0 = just quitted
                                        -2 = white just lost
                                         2 = red just lost */
int     d0;                     /* flag if dice have been reversed from
                                   original position */
int     table[6][6];            /* odds table for possible rolls */
int     rscore;                 /* red's score */
int     wscore;                 /* white's score */
int     gvalue;                 /* value of game (64 max.) */
int     dlast;                  /* who doubled last (0 = neither) */
int     bar;                    /* position of bar for current player */
int     home;                   /* position of home for current player */
int     off[2];                 /* number of men off board */
int     *offptr;                /* pointer to off for current player */
int     *offopp;                /* pointer to off for opponent */
int     in[2];                  /* number of men in inner table */
int     *inptr;                 /* pointer to in for current player */
int     *inopp;                 /* pointer to in for opponent */

int     ncin;                   /* number of characters in cin */
char    cin[100];               /* input line of current move
                                   (used for reconstructing input after
                                   a backspace) */

char    *color[];
                                /* colors as strings */
char    **colorptr;             /* color of current player */
char    **Colorptr;             /* color of current player, capitalized */
int     colen;                  /* length of color of current player */

struct sgttyb   tty;            /* tty information buffer */
int             old;            /* original tty status */
int             noech;          /* original tty status without echo */
int             raw;            /* raw tty status, no echo */

int     curr;                   /* row position of cursor */
int     curc;                   /* column position of cursor */
int     begscr;                 /* 'beginning' of screen
                                   (not including board) */

int     getout();               /* function to exit backgammon cleanly */