games/rain/rain.c

   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  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)rain.c   8.1 (Berkeley) 5/31/93
  31  * $FreeBSD: src/games/rain/rain.c,v 1.8.2.1 2001/03/05 11:54:10 kris Exp $
  32  * $DragonFly: src/games/rain/rain.c,v 1.3 2003/11/12 14:53:54 eirikn Exp $
  33  */
  34
  35 /*
  36  * rain 11/3/1980 EPS/CITHEP
  37  * cc rain.c -o rain -O -ltermlib
  38  */
  39
  40 #include <sys/types.h>
  41 #include <curses.h>
  42 #include <err.h>
  43 #include <stdio.h>
  44 #include <signal.h>
  45 #include <stdlib.h>
  46 #include <unistd.h>
  47
  48 volatile sig_atomic_t sig_caught = 0;
  49
  50 static void onsig (int sig);
  51
  52 int
  53 main(int argc, char **argv)
  54 {
  55         int x, y, j;
  56         long cols, lines;
  57         int xpos[5], ypos[5];
  58         unsigned int delay = 0;
  59         int ch;
  60
  61         while ((ch = getopt(argc, argv, "d:h")) != -1)
  62                 switch (ch) {
  63                 case 'd':
  64                         if ((delay = (unsigned int)strtoul(optarg, NULL, 10)) < 1
  65                             || delay > 1000)
  66                                 errx(1, "invalid delay (1-1000)");
  67                         delay *= 1000;  /* ms -> us */
  68                         break;
  69                 case 'h':
  70                 default:
  71                         (void)fprintf(stderr, "usage: rain [-d delay]\n");
  72                         exit(1);
  73                 }
  74         srandomdev();
  75
  76         initscr();
  77         cols = COLS - 4;
  78         lines = LINES - 4;
  79
  80         (void)signal(SIGHUP, onsig);
  81         (void)signal(SIGINT, onsig);
  82         (void)signal(SIGQUIT, onsig);
  83         (void)signal(SIGSTOP, onsig);
  84         (void)signal(SIGTSTP, onsig);
  85         (void)signal(SIGTERM, onsig);
  86
  87         for (j = 4; j >= 0; --j) {
  88                 xpos[j] = random() % cols + 2;
  89                 ypos[j] = random() % lines + 2;
  90         }
  91         for (j = 0;;) {
  92                 if (sig_caught) {
  93                         endwin();
  94                         exit(0);
  95                 }
  96                 x = random() % cols + 2;
  97                 y = random() % lines + 2;
  98                 mvaddch(y, x, '.');
  99                 mvaddch(ypos[j], xpos[j], 'o');
 100                 if (!j--)
 101                         j = 4;
 102                 mvaddch(ypos[j], xpos[j], 'O');
 103                 if (!j--)
 104                         j = 4;
 105                 mvaddch(ypos[j] - 1, xpos[j], '-');
 106                 mvaddstr(ypos[j], xpos[j] - 1, "|.|");
 107                 mvaddch(ypos[j] + 1, xpos[j], '-');
 108                 if (!j--)
 109                         j = 4;
 110                 mvaddch(ypos[j] - 2, xpos[j], '-');
 111                 mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\");
 112                 mvaddstr(ypos[j], xpos[j] - 2, "| O |");
 113                 mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /");
 114                 mvaddch(ypos[j] + 2, xpos[j], '-');
 115                 if (!j--)
 116                         j = 4;
 117                 mvaddch(ypos[j] - 2, xpos[j], ' ');
 118                 mvaddstr(ypos[j] - 1, xpos[j] - 1, "   ");
 119                 mvaddstr(ypos[j], xpos[j] - 2, "     ");
 120                 mvaddstr(ypos[j] + 1, xpos[j] - 1, "   ");
 121                 mvaddch(ypos[j] + 2, xpos[j], ' ');
 122                 xpos[j] = x;
 123                 ypos[j] = y;
 124                 refresh();
 125                 if (delay) usleep(delay);
 126         }
 127 }
 128
 129 static void
 130 onsig(int sig)
 131 {
 132
 133         sig = 0;
 134         sig_caught = 1;
 135 }