1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)back.h 5.3 (Berkeley) 06/18/88 18 */ 19 20 #include <sgtty.h> 21 22 #define rnum(r) (random()%r) 23 #define D0 dice[0] 24 #define D1 dice[1] 25 #define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;} 26 27 /* 28 * 29 * Some numerical conventions: 30 * 31 * Arrays have white's value in [0], red in [1]. 32 * Numeric values which are one color or the other use 33 * -1 for white, 1 for red. 34 * Hence, white will be negative values, red positive one. 35 * This makes a lot of sense since white is going in decending 36 * order around the board, and red is ascending. 37 * 38 */ 39 40 char EXEC[]; /* object for main program */ 41 char TEACH[]; /* object for tutorial program */ 42 43 int pnum; /* color of player: 44 -1 = white 45 1 = red 46 0 = both 47 2 = not yet init'ed */ 48 char args[100]; /* args passed to teachgammon and back */ 49 int acnt; /* length of args */ 50 int aflag; /* flag to ask for rules or instructions */ 51 int bflag; /* flag for automatic board printing */ 52 int cflag; /* case conversion flag */ 53 int hflag; /* flag for cleaning screen */ 54 int mflag; /* backgammon flag */ 55 int raflag; /* 'roll again' flag for recovered game */ 56 int rflag; /* recovered game flag */ 57 int tflag; /* cursor addressing flag */ 58 int rfl; /* saved value of rflag */ 59 int iroll; /* special flag for inputting rolls */ 60 int board[26]; /* board: negative values are white, 61 positive are red */ 62 int dice[2]; /* value of dice */ 63 int mvlim; /* 'move limit': max. number of moves */ 64 int mvl; /* working copy of mvlim */ 65 int p[5]; /* starting position of moves */ 66 int g[5]; /* ending position of moves (goals) */ 67 int h[4]; /* flag for each move if a man was hit */ 68 int cturn; /* whose turn it currently is: 69 -1 = white 70 1 = red 71 0 = just quitted 72 -2 = white just lost 73 2 = red just lost */ 74 int d0; /* flag if dice have been reversed from 75 original position */ 76 int table[6][6]; /* odds table for possible rolls */ 77 int rscore; /* red's score */ 78 int wscore; /* white's score */ 79 int gvalue; /* value of game (64 max.) */ 80 int dlast; /* who doubled last (0 = neither) */ 81 int bar; /* position of bar for current player */ 82 int home; /* position of home for current player */ 83 int off[2]; /* number of men off board */ 84 int *offptr; /* pointer to off for current player */ 85 int *offopp; /* pointer to off for opponent */ 86 int in[2]; /* number of men in inner table */ 87 int *inptr; /* pointer to in for current player */ 88 int *inopp; /* pointer to in for opponent */ 89 90 int ncin; /* number of characters in cin */ 91 char cin[100]; /* input line of current move 92 (used for reconstructing input after 93 a backspace) */ 94 95 char *color[]; 96 /* colors as strings */ 97 char **colorptr; /* color of current player */ 98 char **Colorptr; /* color of current player, capitalized */ 99 int colen; /* length of color of current player */ 100 101 struct sgttyb tty; /* tty information buffer */ 102 int old; /* original tty status */ 103 int noech; /* original tty status without echo */ 104 int raw; /* raw tty status, no echo */ 105 106 int curr; /* row position of cursor */ 107 int curc; /* column position of cursor */ 108 int begscr; /* 'beginning' of screen 109 (not including board) */ 110 111 int getout(); /* function to exit backgammon cleanly */ 112