1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)back.h 8.1 (Berkeley) 05/31/93 8 */ 9 10 #include <sgtty.h> 11 12 #define rnum(r) (random()%r) 13 #define D0 dice[0] 14 #define D1 dice[1] 15 #define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;} 16 17 /* 18 * 19 * Some numerical conventions: 20 * 21 * Arrays have white's value in [0], red in [1]. 22 * Numeric values which are one color or the other use 23 * -1 for white, 1 for red. 24 * Hence, white will be negative values, red positive one. 25 * This makes a lot of sense since white is going in decending 26 * order around the board, and red is ascending. 27 * 28 */ 29 30 char EXEC[]; /* object for main program */ 31 char TEACH[]; /* object for tutorial program */ 32 33 int pnum; /* color of player: 34 -1 = white 35 1 = red 36 0 = both 37 2 = not yet init'ed */ 38 char args[100]; /* args passed to teachgammon and back */ 39 int acnt; /* length of args */ 40 int aflag; /* flag to ask for rules or instructions */ 41 int bflag; /* flag for automatic board printing */ 42 int cflag; /* case conversion flag */ 43 int hflag; /* flag for cleaning screen */ 44 int mflag; /* backgammon flag */ 45 int raflag; /* 'roll again' flag for recovered game */ 46 int rflag; /* recovered game flag */ 47 int tflag; /* cursor addressing flag */ 48 int rfl; /* saved value of rflag */ 49 int iroll; /* special flag for inputting rolls */ 50 int board[26]; /* board: negative values are white, 51 positive are red */ 52 int dice[2]; /* value of dice */ 53 int mvlim; /* 'move limit': max. number of moves */ 54 int mvl; /* working copy of mvlim */ 55 int p[5]; /* starting position of moves */ 56 int g[5]; /* ending position of moves (goals) */ 57 int h[4]; /* flag for each move if a man was hit */ 58 int cturn; /* whose turn it currently is: 59 -1 = white 60 1 = red 61 0 = just quitted 62 -2 = white just lost 63 2 = red just lost */ 64 int d0; /* flag if dice have been reversed from 65 original position */ 66 int table[6][6]; /* odds table for possible rolls */ 67 int rscore; /* red's score */ 68 int wscore; /* white's score */ 69 int gvalue; /* value of game (64 max.) */ 70 int dlast; /* who doubled last (0 = neither) */ 71 int bar; /* position of bar for current player */ 72 int home; /* position of home for current player */ 73 int off[2]; /* number of men off board */ 74 int *offptr; /* pointer to off for current player */ 75 int *offopp; /* pointer to off for opponent */ 76 int in[2]; /* number of men in inner table */ 77 int *inptr; /* pointer to in for current player */ 78 int *inopp; /* pointer to in for opponent */ 79 80 int ncin; /* number of characters in cin */ 81 char cin[100]; /* input line of current move 82 (used for reconstructing input after 83 a backspace) */ 84 85 char *color[]; 86 /* colors as strings */ 87 char **colorptr; /* color of current player */ 88 char **Colorptr; /* color of current player, capitalized */ 89 int colen; /* length of color of current player */ 90 91 struct sgttyb tty; /* tty information buffer */ 92 int old; /* original tty status */ 93 int noech; /* original tty status without echo */ 94 int raw; /* raw tty status, no echo */ 95 96 int curr; /* row position of cursor */ 97 int curc; /* column position of cursor */ 98 int begscr; /* 'beginning' of screen 99 (not including board) */ 100 101 int getout(); /* function to exit backgammon cleanly */ 102