1.\" $NetBSD: life.c,v 1.5 1999/07/02 16:11:15 simonb Exp $ 2.\" 3.\" Copyright (c) 1980, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)life.c 8.1 (Berkeley) 6/8/93 31.\" 32# include <curses.h> 33# include <signal.h> 34 35/* 36 * Run a life game. This is a demonstration program for 37 * the Screen Updating section of the -lcurses cursor package. 38 */ 39 40typedef struct lst_st { /* linked list element */ 41 int y, x; /* (y, x) position of piece */ 42 struct lst_st *next, *last; /* doubly linked */ 43} LIST; 44 45LIST *Head; /* head of linked list */ 46 47int die(); 48 49main(ac, av) 50int ac; 51char *av[]; 52{ 53 evalargs(ac, av); /* evaluate arguments */ 54 55 initscr(); /* initialize screen package */ 56 signal(SIGINT, die); /* set to restore tty stats */ 57 cbreak(); /* set for char-by-char */ 58 noecho(); /* input */ 59 nonl(); /* for optimization */ 60 61 getstart(); /* get starting position */ 62 for (;;) { 63 prboard(); /* print out current board */ 64 update(); /* update board position */ 65 } 66} 67 68/* 69 * This is the routine which is called when rubout is hit. 70 * It resets the tty stats to their original values. This 71 * is the normal way of leaving the program. 72 */ 73die() 74{ 75 signal(SIGINT, SIG_IGN); /* ignore rubouts */ 76 mvcur(0, COLS - 1, LINES - 1, 0); /* go to bottom of screen */ 77 endwin(); /* set terminal to good state */ 78 exit(0); 79} 80 81/* 82 * Get the starting position from the user. They keys u, i, o, j, l, 83 * m, ,, and . are used for moving their relative directions from the 84 * k key. Thus, u move diagonally up to the left, , moves directly down, 85 * etc. x places a piece at the current position, " " takes it away. 86 * The input can also be from a file. The list is built after the 87 * board setup is ready. 88 */ 89getstart() 90{ 91 reg char c; 92 reg int x, y; 93 auto char buf[100]; 94 95 box(stdscr, '|', '_'); /* box in the screen */ 96 move(1, 1); /* move to upper left corner */ 97 98 for (;;) { 99 refresh(); /* print current position */ 100 if ((c = getch()) == 'q') 101 break; 102 switch (c) { 103 case 'u': 104 case 'i': 105 case 'o': 106 case 'j': 107 case 'l': 108 case 'm': 109 case ',': 110 case '.': 111 adjustyx(c); 112 break; 113 case 'f': 114 mvaddstr(0, 0, "File name: "); 115 getstr(buf); 116 readfile(buf); 117 break; 118 case 'x': 119 addch('X'); 120 break; 121 case ' ': 122 addch(' '); 123 break; 124 } 125 } 126 127 if (Head != NULL) /* start new list */ 128 dellist(Head); 129 Head = malloc(sizeof (LIST)); 130 131 /* 132 * loop through the screen looking for 'x's, and add a list 133 * element for each one 134 */ 135 for (y = 1; y < LINES - 1; y++) 136 for (x = 1; x < COLS - 1; x++) { 137 move(y, x); 138 if (inch() == 'x') 139 addlist(y, x); 140 } 141} 142 143/* 144 * Print out the current board position from the linked list 145 */ 146prboard() { 147 148 reg LIST *hp; 149 150 erase(); /* clear out last position */ 151 box(stdscr, '|', '_'); /* box in the screen */ 152 153 /* 154 * go through the list adding each piece to the newly 155 * blank board 156 */ 157 for (hp = Head; hp; hp = hp->next) 158 mvaddch(hp->y, hp->x, 'X'); 159 160 refresh(); 161} 162