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. 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. 16 * 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 27 * SUCH DAMAGE. 28 * 29 * @(#)back.h 8.1 (Berkeley) 5/31/93 30 */ 31 32 #include <termios.h> 33 #include <stdlib.h> 34 #include <unistd.h> 35 36 #define rnum(r) (random()%r) 37 #define D0 dice[0] 38 #define D1 dice[1] 39 #define swap {D0 ^= D1; D1 ^= D0; D0 ^= D1; d0 = 1-d0;} 40 41 /* 42 * 43 * Some numerical conventions: 44 * 45 * Arrays have white's value in [0], red in [1]. 46 * Numeric values which are one color or the other use 47 * -1 for white, 1 for red. 48 * Hence, white will be negative values, red positive one. 49 * This makes a lot of sense since white is going in descending 50 * order around the board, and red is ascending. 51 * 52 */ 53 54 extern const char EXEC[]; /* object for main program */ 55 extern const char TEACH[];/* object for tutorial program */ 56 57 extern int pnum; /* color of player: 58 -1 = white 59 1 = red 60 0 = both 61 2 = not yet init'ed */ 62 extern char *args[16]; /* args passed to teachgammon and back */ 63 extern int acnt; /* number of args */ 64 extern int aflag; /* flag to ask for rules or instructions */ 65 extern int bflag; /* flag for automatic board printing */ 66 extern int cflag; /* case conversion flag */ 67 extern int hflag; /* flag for cleaning screen */ 68 extern int mflag; /* backgammon flag */ 69 extern int raflag; /* 'roll again' flag for recovered game */ 70 extern int rflag; /* recovered game flag */ 71 extern int tflag; /* cursor addressing flag */ 72 extern int rfl; /* saved value of rflag */ 73 extern int iroll; /* special flag for inputting rolls */ 74 extern int board[26]; /* board: negative values are white, 75 positive are red */ 76 extern int dice[2]; /* value of dice */ 77 extern int mvlim; /* 'move limit': max. number of moves */ 78 extern int mvl; /* working copy of mvlim */ 79 extern int p[5]; /* starting position of moves */ 80 extern int g[5]; /* ending position of moves (goals) */ 81 extern int h[4]; /* flag for each move if a man was hit */ 82 extern int cturn; /* whose turn it currently is: 83 -1 = white 84 1 = red 85 0 = just quitted 86 -2 = white just lost 87 2 = red just lost */ 88 extern int d0; /* flag if dice have been reversed from 89 original position */ 90 extern int table[6][6]; /* odds table for possible rolls */ 91 extern int rscore; /* red's score */ 92 extern int wscore; /* white's score */ 93 extern int gvalue; /* value of game (64 max.) */ 94 extern int dlast; /* who doubled last (0 = neither) */ 95 extern int bar; /* position of bar for current player */ 96 extern int home; /* position of home for current player */ 97 extern int off[2]; /* number of men off board */ 98 extern int *offptr; /* pointer to off for current player */ 99 extern int *offopp; /* pointer to off for opponent */ 100 extern int in[2]; /* number of men in inner table */ 101 extern int *inptr; /* pointer to in for current player */ 102 extern int *inopp; /* pointer to in for opponent */ 103 104 extern int ncin; /* number of characters in cin */ 105 extern char cin[100]; /* input line of current move 106 (used for reconstructing input after 107 a backspace) */ 108 109 extern const char *const color[]; 110 /* colors as strings */ 111 extern const char *const *colorptr; /* color of current player */ 112 extern const char *const *Colorptr; /* color of current player, capitalized */ 113 extern int colen; /* length of color of current player */ 114 115 extern struct termios tty; /* tty information buffer */ 116 extern int old; /* original tty status */ 117 extern int noech; /* original tty status without echo */ 118 extern int bgraw; /* raw tty status, no echo */ 119 120 extern int curr; /* row position of cursor */ 121 extern int curc; /* column position of cursor */ 122 extern int begscr; /* 'beginning' of screen 123 (not including board) */ 124 125 int addbuf(int); 126 void backone(int); 127 void buflush(void); 128 int canhit(int, int); 129 int checkmove(int); 130 void clear(void); 131 void clend(void); 132 void cline(void); 133 int count(void); 134 void curmove(int, int); 135 void dble(void); 136 int dblgood(void); 137 void errexit(const char *); 138 void fancyc(char); 139 void fboard(void); 140 void fixtty(int); 141 int freemen(int); 142 void getarg(int, char **); 143 int getcaps(const char *); 144 void getmove(void); 145 void getout(int); /* function to exit backgammon cleanly */ 146 void gwrite(void); 147 void init(void); 148 int makmove(int); 149 int movallow(void); 150 void movback(int); 151 void move(int); 152 void moverr(int); 153 int movokay(int); 154 void newpos(void); 155 void nexturn(void); 156 void odds(int, int, int); 157 void proll(void); 158 int quit(void); 159 char readc(void); 160 void recover(const char *); 161 void refresh(void); 162 void roll(void); 163 void save(int); 164 #ifdef TEACHGAMMON_TEXT 165 int text(const char *const *); 166 #else 167 void text(const char *const *); 168 #endif 169 int trapped(int, int); 170 void wrboard(void); 171 void wrhit(int); 172 void wrint(int); 173 void writec(char); 174 void writel(const char *); 175 void wrscore(void); 176 int yorn(char); 177