2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)back.h 8.1 (Berkeley) 5/31/93
30 * $DragonFly: src/games/backgammon/common_source/back.h,v 1.2 2006/08/08 16:36:11 pavalos Exp $
37 #define rnum(r) (random()%r)
40 #define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;}
44 * Some numerical conventions:
46 * Arrays have white's value in [0], red in [1].
47 * Numeric values which are one color or the other use
48 * -1 for white, 1 for red.
49 * Hence, white will be negative values, red positive one.
50 * This makes a lot of sense since white is going in descending
51 * order around the board, and red is ascending.
55 extern const char EXEC[]; /* object for main program */
56 extern const char TEACH[];/* object for tutorial program */
58 extern int pnum; /* color of player:
62 2 = not yet init'ed */
63 extern char *args[16]; /* args passed to teachgammon and back */
64 extern int acnt; /* number of args */
65 extern int aflag; /* flag to ask for rules or instructions */
66 extern int bflag; /* flag for automatic board printing */
67 extern int cflag; /* case conversion flag */
68 extern int hflag; /* flag for cleaning screen */
69 extern int mflag; /* backgammon flag */
70 extern int raflag; /* 'roll again' flag for recovered game */
71 extern int rflag; /* recovered game flag */
72 extern int tflag; /* cursor addressing flag */
73 extern int rfl; /* saved value of rflag */
74 extern int iroll; /* special flag for inputting rolls */
75 extern int board[26]; /* board: negative values are white,
77 extern int dice[2]; /* value of dice */
78 extern int mvlim; /* 'move limit': max. number of moves */
79 extern int mvl; /* working copy of mvlim */
80 extern int p[5]; /* starting position of moves */
81 extern int g[5]; /* ending position of moves (goals) */
82 extern int h[4]; /* flag for each move if a man was hit */
83 extern int cturn; /* whose turn it currently is:
89 extern int d0; /* flag if dice have been reversed from
91 extern int table[6][6]; /* odds table for possible rolls */
92 extern int rscore; /* red's score */
93 extern int wscore; /* white's score */
94 extern int gvalue; /* value of game (64 max.) */
95 extern int dlast; /* who doubled last (0 = neither) */
96 extern int bar; /* position of bar for current player */
97 extern int home; /* position of home for current player */
98 extern int off[2]; /* number of men off board */
99 extern int *offptr; /* pointer to off for current player */
100 extern int *offopp; /* pointer to off for opponent */
101 extern int in[2]; /* number of men in inner table */
102 extern int *inptr; /* pointer to in for current player */
103 extern int *inopp; /* pointer to in for opponent */
105 extern int ncin; /* number of characters in cin */
106 extern char cin[100]; /* input line of current move
107 (used for reconstructing input after
110 extern const char *const color[];
111 /* colors as strings */
112 extern const char *const *colorptr; /* color of current player */
113 extern const char *const *Colorptr; /* color of current player, capitalized */
114 extern int colen; /* length of color of current player */
116 extern struct termios tty; /* tty information buffer */
117 extern int old; /* original tty status */
118 extern int noech; /* original tty status without echo */
119 extern int raw; /* raw tty status, no echo */
121 extern int curr; /* row position of cursor */
122 extern int curc; /* column position of cursor */
123 extern int begscr; /* 'beginning' of screen
124 (not including board) */
129 int canhit(int, int);
135 void curmove(int, int);
138 void errexit(const char *);
143 void getarg(int, char **);
144 int getcaps(const char *);
146 void getout(void); /* function to exit backgammon cleanly */
157 void odds(int, int, int);
161 void recover(const char *);
165 #ifdef TEACHGAMMON_TEXT
166 int text(const char *const *);
168 void text(const char *const *);
170 int trapped(int, int);
175 void writel(const char *);