1 /* $NetBSD: back.h,v 1.21 2020/04/22 23:36:26 joerg 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) {(m)->D0 ^= (m)->D1; (m)->D1 ^= (m)->D0; (m)->D0 ^= (m)->D1; (m)->d0 = 1-(m)->d0;} 50 51 struct move { 52 int dice[2]; /* value of dice */ 53 int mvlim; /* 'move limit': max. number of moves */ 54 int p[5]; /* starting position of moves */ 55 int g[5]; /* ending position of moves (goals) */ 56 int h[4]; /* flag for each move if a man was hit */ 57 int d0; /* flag if dice have been reversed from 58 original position */ 59 }; 60 61 /* 62 * 63 * Some numerical conventions: 64 * 65 * Arrays have white's value in [0], red in [1]. 66 * Numeric values which are one color or the other use 67 * -1 for white, 1 for red. 68 * Hence, white will be negative values, red positive one. 69 * This makes a lot of sense since white is going in decending 70 * order around the board, and red is ascending. 71 * 72 */ 73 74 extern const char EXEC[]; /* object for main program */ 75 extern const char TEACH[]; /* object for tutorial program */ 76 77 extern int pnum; /* color of player: 78 -1 = white 79 1 = red 80 0 = both 81 2 = not yet init'ed */ 82 extern char args[100]; /* args passed to teachgammon and back */ 83 extern int acnt; /* length of args */ 84 extern int aflag; /* flag to ask for rules or instructions */ 85 extern int bflag; /* flag for automatic board printing */ 86 extern int cflag; /* case conversion flag */ 87 extern int hflag; /* flag for cleaning screen */ 88 extern int mflag; /* backgammon flag */ 89 extern int raflag; /* 'roll again' flag for recovered game */ 90 extern int rflag; /* recovered game flag */ 91 extern int tflag; /* cursor addressing flag */ 92 extern int rfl; /* saved value of rflag */ 93 extern int iroll; /* special flag for inputting rolls */ 94 extern int board[26]; /* board: negative values are white, 95 positive are red */ 96 extern int cturn; /* whose turn it currently is: 97 -1 = white 98 1 = red 99 0 = just quitted 100 -2 = white just lost 101 2 = red just lost */ 102 extern int table[6][6]; /* odds table for possible rolls */ 103 extern int rscore; /* red's score */ 104 extern int wscore; /* white's score */ 105 extern int gvalue; /* value of game (64 max.) */ 106 extern int dlast; /* who doubled last (0 = neither) */ 107 extern int bar; /* position of bar for current player */ 108 extern int home; /* position of home for current player */ 109 extern int off[2]; /* number of men off board */ 110 extern int *offptr; /* pointer to off for current player */ 111 extern int *offopp; /* pointer to off for opponent */ 112 extern int in[2]; /* number of men in inner table */ 113 extern int *inptr; /* pointer to in for current player */ 114 extern int *inopp; /* pointer to in for opponent */ 115 116 extern int ncin; /* number of characters in cin */ 117 extern char cin[100]; /* input line of current move 118 (used for reconstructing input after 119 a backspace) */ 120 121 extern const char *const color[]; 122 /* colors as strings */ 123 extern const char *const *colorptr; /* color of current player */ 124 extern const char *const *Colorptr; /* color of current player, capitalized */ 125 extern int colen; /* length of color of current player */ 126 127 extern int buffnum; 128 129 extern struct termios old, noech, raw;/* original tty status */ 130 131 extern int curr; /* row position of cursor */ 132 extern int curc; /* column position of cursor */ 133 extern int begscr; /* 'beginning' of screen 134 (not including board) */ 135 136 int addbuf(int); 137 void backone(struct move *, int); 138 void buflush(void); 139 int canhit(int, int); 140 int checkmove(struct move *, int); 141 void clear(void); 142 void clend(void); 143 void cline(void); 144 int count(void); 145 void curmove(int, int); 146 void errexit(const char *) __dead2; 147 void fancyc(int); 148 void fboard(void); 149 void fixtty(struct termios *); 150 void getarg(struct move *, char ***); 151 int getcaps(const char *); 152 void getmove(struct move *); 153 void getout(int) __dead2; 154 void gwrite(void); 155 void init(void); 156 int main(int, char *[]); 157 int makmove(struct move *, int); 158 int movallow(struct move *); 159 void movback(struct move *, int); 160 void moverr(struct move *, int); 161 int movokay(struct move *, int); 162 void newpos(void); 163 void nexturn(void); 164 void odds(int, int, int); 165 void proll(struct move *); 166 int quit(struct move *); 167 int readc(void); 168 void recover(struct move *, const char *); 169 void refresh(void); 170 void roll(struct move *); 171 void save(struct move *, int); 172 int wrtext(const char *const *); 173 void wrboard(void); 174 void wrhit(int); 175 void wrint(int); 176 void writec(int); 177 void writel(const char *); 178 void wrscore(void); 179 int yorn(int); 180 181 void move_init(struct move *); 182