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33 * @(#)back.h 8.1 (Berkeley) 5/31/93
38 #define rnum(r) (random()%r)
41 #define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;}
45 * Some numerical conventions:
47 * Arrays have white's value in [0], red in [1].
48 * Numeric values which are one color or the other use
49 * -1 for white, 1 for red.
50 * Hence, white will be negative values, red positive one.
51 * This makes a lot of sense since white is going in decending
52 * order around the board, and red is ascending.
56 extern const char EXEC[]; /* object for main program */
57 extern const char TEACH[];/* object for tutorial program */
59 extern int pnum; /* color of player:
63 2 = not yet init'ed */
64 extern char *args[16]; /* args passed to teachgammon and back */
65 extern int acnt; /* number of args */
66 extern int aflag; /* flag to ask for rules or instructions */
67 extern int bflag; /* flag for automatic board printing */
68 extern int cflag; /* case conversion flag */
69 extern int hflag; /* flag for cleaning screen */
70 extern int mflag; /* backgammon flag */
71 extern int raflag; /* 'roll again' flag for recovered game */
72 extern int rflag; /* recovered game flag */
73 extern int tflag; /* cursor addressing flag */
74 extern int rfl; /* saved value of rflag */
75 extern int iroll; /* special flag for inputting rolls */
76 extern int board[26]; /* board: negative values are white,
78 extern int dice[2]; /* value of dice */
79 extern int mvlim; /* 'move limit': max. number of moves */
80 extern int mvl; /* working copy of mvlim */
81 extern int p[5]; /* starting position of moves */
82 extern int g[5]; /* ending position of moves (goals) */
83 extern int h[4]; /* flag for each move if a man was hit */
84 extern int cturn; /* whose turn it currently is:
90 extern int d0; /* flag if dice have been reversed from
92 extern int table[6][6]; /* odds table for possible rolls */
93 extern int rscore; /* red's score */
94 extern int wscore; /* white's score */
95 extern int gvalue; /* value of game (64 max.) */
96 extern int dlast; /* who doubled last (0 = neither) */
97 extern int bar; /* position of bar for current player */
98 extern int home; /* position of home for current player */
99 extern int off[2]; /* number of men off board */
100 extern int *offptr; /* pointer to off for current player */
101 extern int *offopp; /* pointer to off for opponent */
102 extern int in[2]; /* number of men in inner table */
103 extern int *inptr; /* pointer to in for current player */
104 extern int *inopp; /* pointer to in for opponent */
106 extern int ncin; /* number of characters in cin */
107 extern char cin[100]; /* input line of current move
108 (used for reconstructing input after
111 extern const char *const color[];
112 /* colors as strings */
113 extern const char *const *colorptr; /* color of current player */
114 extern const char *const *Colorptr; /* color of current player, capitalized */
115 extern int colen; /* length of color of current player */
117 extern struct sgttyb tty; /* tty information buffer */
118 extern int old; /* original tty status */
119 extern int noech; /* original tty status without echo */
120 extern int raw; /* raw tty status, no echo */
122 extern int curr; /* row position of cursor */
123 extern int curc; /* column position of cursor */
124 extern int begscr; /* 'beginning' of screen
125 (not including board) */
127 void getout(); /* function to exit backgammon cleanly */