2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
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14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
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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 $
41 #define rnum(r) (random()%r)
44 #define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;}
48 * Some numerical conventions:
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.
59 extern const char EXEC[]; /* object for main program */
60 extern const char TEACH[];/* object for tutorial program */
62 extern int pnum; /* color of player:
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,
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:
93 extern int d0; /* flag if dice have been reversed from
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 */
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
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 */
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 */
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) */
139 void curmove(int, int);
145 int getcaps(const char *);
147 void odds(int, int, int);
149 int canhit(int, int);
157 void recover(const char *);
159 void errexit(const char *);
164 void writel(const char *);
172 void getarg(int, char **);
176 void getout(void); /* function to exit backgammon cleanly */
184 int trapped(int, int);
188 #ifdef TEACHGAMMON_TEXT
189 int text(const char *const *);
191 void text(const char *const *);