* Copyright (c) 1980 Regents of the University of California.
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* modification, are permitted provided that the following conditions
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* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
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* may be used to endorse or promote products derived from this software
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* @(#)back.h 5.4 (Berkeley) 6/1/90
#define rnum(r) (random()%r)
#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:
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,
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:
int d0
; /* flag if dice have been reversed from
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
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
int getout(); /* function to exit backgammon cleanly */