1 /* $NetBSD: back.h,v 1.23 2021/12/12 22:20:52 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)back.h 8.1 (Berkeley) 5/31/93 32 */ 33 34 #include <sys/types.h> 35 #include <sys/uio.h> 36 37 #include <fcntl.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <termios.h> 43 #include <termcap.h> 44 #include <unistd.h> 45 46 #define rnum(r) (random()%r) 47 #define D0 dice[0] 48 #define D1 dice[1] 49 #define mswap(m) { \ 50 (m)->D0 ^= (m)->D1; \ 51 (m)->D1 ^= (m)->D0; \ 52 (m)->D0 ^= (m)->D1; \ 53 (m)->d0 = 1-(m)->d0; \ 54 } 55 56 struct move { 57 int dice[2]; /* value of dice */ 58 int mvlim; /* 'move limit': max. number of moves */ 59 int p[5]; /* starting position of moves */ 60 int g[5]; /* ending position of moves (goals) */ 61 int h[4]; /* flag for each move if a man was hit */ 62 int d0; /* flag if dice have been reversed from 63 original position */ 64 }; 65 66 /* 67 * 68 * Some numerical conventions: 69 * 70 * Arrays have white's value in [0], red in [1]. 71 * Numeric values which are one color or the other use 72 * -1 for white, 1 for red. 73 * Hence, white will be negative values, red positive one. 74 * This makes a lot of sense since white is going in descending 75 * order around the board, and red is ascending. 76 * 77 */ 78 79 extern const char EXEC[]; /* object for main program */ 80 extern const char TEACH[]; /* object for tutorial program */ 81 82 extern int pnum; /* color of player: 83 -1 = white 84 1 = red 85 0 = both 86 2 = not yet init'ed */ 87 extern char args[100]; /* args passed to teachgammon and back */ 88 extern int acnt; /* length of args */ 89 extern int aflag; /* flag to ask for rules or instructions */ 90 extern int bflag; /* flag for automatic board printing */ 91 extern int cflag; /* case conversion flag */ 92 extern int hflag; /* flag for cleaning screen */ 93 extern int mflag; /* backgammon flag */ 94 extern int raflag; /* 'roll again' flag for recovered game */ 95 extern int rflag; /* recovered game flag */ 96 extern int tflag; /* cursor addressing flag */ 97 extern int rfl; /* saved value of rflag */ 98 extern int iroll; /* special flag for inputting rolls */ 99 extern int board[26]; /* board: negative values are white, 100 positive are red */ 101 extern int cturn; /* whose turn it currently is: 102 -1 = white 103 1 = red 104 0 = just quitted 105 -2 = white just lost 106 2 = red just lost */ 107 extern int table[6][6]; /* odds table for possible rolls */ 108 extern int rscore; /* red's score */ 109 extern int wscore; /* white's score */ 110 extern int gvalue; /* value of game (64 max.) */ 111 extern int dlast; /* who doubled last (0 = neither) */ 112 extern int bar; /* position of bar for current player */ 113 extern int home; /* position of home for current player */ 114 extern int off[2]; /* number of men off board */ 115 extern int *offptr; /* pointer to off for current player */ 116 extern int *offopp; /* pointer to off for opponent */ 117 extern int in[2]; /* number of men in inner table */ 118 extern int *inptr; /* pointer to in for current player */ 119 extern int *inopp; /* pointer to in for opponent */ 120 121 extern int ncin; /* number of characters in cin */ 122 extern char cin[100]; /* input line of current move 123 (used for reconstructing input after 124 a backspace) */ 125 126 extern const char *const color[]; 127 /* colors as strings */ 128 extern const char *const *colorptr; /* color of current player */ 129 extern const char *const *Colorptr; /* ditto, capitalized */ 130 extern int colen; /* length of color of current player */ 131 132 extern int buffnum; 133 134 extern struct termios old, noech, raw;/* original tty status */ 135 136 extern int curr; /* row position of cursor */ 137 extern int curc; /* column position of cursor */ 138 extern int begscr; /* 'beginning' of screen 139 (not including board) */ 140 141 int addbuf(int); 142 void backone(struct move *, int); 143 void buflush(void); 144 int canhit(int, int); 145 int checkmove(struct move *, int); 146 void clear(void); 147 void clend(void); 148 void cline(void); 149 int count(void); 150 void curmove(int, int); 151 void errexit(const char *) __dead; 152 void fancyc(int); 153 void fboard(void); 154 void fixtty(struct termios *); 155 void getarg(struct move *, char ***); 156 int getcaps(const char *); 157 void getmove(struct move *); 158 void getout(int) __dead; 159 void gwrite(void); 160 void init(void); 161 int main(int, char *[]); 162 int makmove(struct move *, int); 163 int movallow(struct move *); 164 void movback(struct move *, int); 165 void moverr(struct move *, int); 166 int movokay(struct move *, int); 167 void newpos(void); 168 void nexturn(void); 169 void odds(int, int, int); 170 void proll(struct move *); 171 int quit(struct move *); 172 int readc(void); 173 void recover(struct move *, const char *); 174 void refresh(void); 175 void roll(struct move *); 176 void save(struct move *, int); 177 int wrtext(const char *const *); 178 void wrboard(void); 179 void wrhit(int); 180 void wrint(int); 181 void writec(int); 182 void writel(const char *); 183 void wrscore(void); 184 int yorn(int); 185 186 void move_init(struct move *); 187