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 this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific prior written permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 * 12 * @(#)back.h 5.2 (Berkeley) 02/16/88 13 */ 14 15 #include <sgtty.h> 16 17 #define rnum(r) (random()%r) 18 #define D0 dice[0] 19 #define D1 dice[1] 20 #define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;} 21 22 /* 23 * 24 * Some numerical conventions: 25 * 26 * Arrays have white's value in [0], red in [1]. 27 * Numeric values which are one color or the other use 28 * -1 for white, 1 for red. 29 * Hence, white will be negative values, red positive one. 30 * This makes a lot of sense since white is going in decending 31 * order around the board, and red is ascending. 32 * 33 */ 34 35 char EXEC[]; /* object for main program */ 36 char TEACH[]; /* object for tutorial program */ 37 38 int pnum; /* color of player: 39 -1 = white 40 1 = red 41 0 = both 42 2 = not yet init'ed */ 43 char args[100]; /* args passed to teachgammon and back */ 44 int acnt; /* length of args */ 45 int aflag; /* flag to ask for rules or instructions */ 46 int bflag; /* flag for automatic board printing */ 47 int cflag; /* case conversion flag */ 48 int hflag; /* flag for cleaning screen */ 49 int mflag; /* backgammon flag */ 50 int raflag; /* 'roll again' flag for recovered game */ 51 int rflag; /* recovered game flag */ 52 int tflag; /* cursor addressing flag */ 53 int rfl; /* saved value of rflag */ 54 int iroll; /* special flag for inputting rolls */ 55 int board[26]; /* board: negative values are white, 56 positive are red */ 57 int dice[2]; /* value of dice */ 58 int mvlim; /* 'move limit': max. number of moves */ 59 int mvl; /* working copy of mvlim */ 60 int p[5]; /* starting position of moves */ 61 int g[5]; /* ending position of moves (goals) */ 62 int h[4]; /* flag for each move if a man was hit */ 63 int cturn; /* whose turn it currently is: 64 -1 = white 65 1 = red 66 0 = just quitted 67 -2 = white just lost 68 2 = red just lost */ 69 int d0; /* flag if dice have been reversed from 70 original position */ 71 int table[6][6]; /* odds table for possible rolls */ 72 int rscore; /* red's score */ 73 int wscore; /* white's score */ 74 int gvalue; /* value of game (64 max.) */ 75 int dlast; /* who doubled last (0 = neither) */ 76 int bar; /* position of bar for current player */ 77 int home; /* position of home for current player */ 78 int off[2]; /* number of men off board */ 79 int *offptr; /* pointer to off for current player */ 80 int *offopp; /* pointer to off for opponent */ 81 int in[2]; /* number of men in inner table */ 82 int *inptr; /* pointer to in for current player */ 83 int *inopp; /* pointer to in for opponent */ 84 85 int ncin; /* number of characters in cin */ 86 char cin[100]; /* input line of current move 87 (used for reconstructing input after 88 a backspace) */ 89 90 char *color[]; 91 /* colors as strings */ 92 char **colorptr; /* color of current player */ 93 char **Colorptr; /* color of current player, capitalized */ 94 int colen; /* length of color of current player */ 95 96 struct sgttyb tty; /* tty information buffer */ 97 int old; /* original tty status */ 98 int noech; /* original tty status without echo */ 99 int raw; /* raw tty status, no echo */ 100 101 int curr; /* row position of cursor */ 102 int curc; /* column position of cursor */ 103 int begscr; /* 'beginning' of screen 104 (not including board) */ 105 106 int getout(); /* function to exit backgammon cleanly */ 107