1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)back.h 8.1 (Berkeley) 5/31/93 34 */ 35 36 #include <sgtty.h> 37 38 #define rnum(r) (random()%r) 39 #define D0 dice[0] 40 #define D1 dice[1] 41 #define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;} 42 43 /* 44 * 45 * Some numerical conventions: 46 * 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. 53 * 54 */ 55 56 extern const char EXEC[]; /* object for main program */ 57 extern const char TEACH[];/* object for tutorial program */ 58 59 extern int pnum; /* color of player: 60 -1 = white 61 1 = red 62 0 = both 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, 77 positive are red */ 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: 85 -1 = white 86 1 = red 87 0 = just quitted 88 -2 = white just lost 89 2 = red just lost */ 90 extern int d0; /* flag if dice have been reversed from 91 original position */ 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 */ 105 106 extern int ncin; /* number of characters in cin */ 107 extern char cin[100]; /* input line of current move 108 (used for reconstructing input after 109 a backspace) */ 110 111 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 */ 116 117 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 */ 121 122 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) */ 126 127 void getout(); /* function to exit backgammon cleanly */ 128