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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)rain.c   8.1 (Berkeley) 5/31/93
  35  * $FreeBSD: src/games/rain/rain.c,v 1.8.2.1 2001/03/05 11:54:10 kris Exp $
  36  * $DragonFly: src/games/rain/rain.c,v 1.3 2003/11/12 14:53:54 eirikn Exp $
  37  */
  38
  39 /*
  40  * rain 11/3/1980 EPS/CITHEP
  41  * cc rain.c -o rain -O -ltermlib
  42  */
  43
  44 #include <sys/types.h>
  45 #include <curses.h>
  46 #include <err.h>
  47 #include <stdio.h>
  48 #include <signal.h>
  49 #include <stdlib.h>
  50 #include <unistd.h>
  51
  52 volatile sig_atomic_t sig_caught = 0;
  53
  54 static void onsig (int sig);
  55
  56 int
  57 main(int argc, char **argv)
  58 {
  59         int x, y, j;
  60         long cols, lines;
  61         int xpos[5], ypos[5];
  62         unsigned int delay = 0;
  63         int ch;
  64
  65         while ((ch = getopt(argc, argv, "d:h")) != -1)
  66                 switch (ch) {
  67                 case 'd':
  68                         if ((delay = (unsigned int)strtoul(optarg, NULL, 10)) < 1
  69                             || delay > 1000)
  70                                 errx(1, "invalid delay (1-1000)");
  71                         delay *= 1000;  /* ms -> us */
  72                         break;
  73                 case 'h':
  74                 default:
  75                         (void)fprintf(stderr, "usage: rain [-d delay]\n");
  76                         exit(1);
  77                 }
  78         srandomdev();
  79
  80         initscr();
  81         cols = COLS - 4;
  82         lines = LINES - 4;
  83
  84         (void)signal(SIGHUP, onsig);
  85         (void)signal(SIGINT, onsig);
  86         (void)signal(SIGQUIT, onsig);
  87         (void)signal(SIGSTOP, onsig);
  88         (void)signal(SIGTSTP, onsig);
  89         (void)signal(SIGTERM, onsig);
  90
  91         for (j = 4; j >= 0; --j) {
  92                 xpos[j] = random() % cols + 2;
  93                 ypos[j] = random() % lines + 2;
  94         }
  95         for (j = 0;;) {
  96                 if (sig_caught) {
  97                         endwin();
  98                         exit(0);
  99                 }
 100                 x = random() % cols + 2;
 101                 y = random() % lines + 2;
 102                 mvaddch(y, x, '.');
 103                 mvaddch(ypos[j], xpos[j], 'o');
 104                 if (!j--)
 105                         j = 4;
 106                 mvaddch(ypos[j], xpos[j], 'O');
 107                 if (!j--)
 108                         j = 4;
 109                 mvaddch(ypos[j] - 1, xpos[j], '-');
 110                 mvaddstr(ypos[j], xpos[j] - 1, "|.|");
 111                 mvaddch(ypos[j] + 1, xpos[j], '-');
 112                 if (!j--)
 113                         j = 4;
 114                 mvaddch(ypos[j] - 2, xpos[j], '-');
 115                 mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\");
 116                 mvaddstr(ypos[j], xpos[j] - 2, "| O |");
 117                 mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /");
 118                 mvaddch(ypos[j] + 2, xpos[j], '-');
 119                 if (!j--)
 120                         j = 4;
 121                 mvaddch(ypos[j] - 2, xpos[j], ' ');
 122                 mvaddstr(ypos[j] - 1, xpos[j] - 1, "   ");
 123                 mvaddstr(ypos[j], xpos[j] - 2, "     ");
 124                 mvaddstr(ypos[j] + 1, xpos[j] - 1, "   ");
 125                 mvaddch(ypos[j] + 2, xpos[j], ' ');
 126                 xpos[j] = x;
 127                 ypos[j] = y;
 128                 refresh();
 129                 if (delay) usleep(delay);
 130         }
 131 }
 132
 133 static void
 134 onsig(int sig)
 135 {
 136
 137         sig = 0;
 138         sig_caught = 1;
 139 }