351 lines
8.2 KiB
C
351 lines
8.2 KiB
C
/* $NetBSD: worms.c,v 1.23 2020/10/14 07:32:53 nia Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)worms.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: worms.c,v 1.23 2020/10/14 07:32:53 nia Exp $");
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#endif
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#endif /* not lint */
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/*
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*
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* @@@ @@@ @@@@@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@
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* @@@ @@@ @@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@
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* @@@ @@@ @@@@ @@@@ @@@@ @@@@ @@@ @@@@
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* @@@ @@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
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* @@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
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* @@@@ @@@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@
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* @@@@@@@@@@@@ @@@@ @@@@ @@@ @@@ @@@ @@@
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* @@@@ @@@@ @@@@@@@@@@@@ @@@ @@@ @@@ @@@
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* @@ @@ @@@@@@@@@@ @@@ @@@ @@@ @@@
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*
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* Eric P. Scott
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* Caltech High Energy Physics
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* October, 1980
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*
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*/
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#include <sys/types.h>
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#include <curses.h>
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#include <err.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static const struct options {
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int nopts;
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int opts[3];
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}
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normal[8] = {
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{ 3, { 7, 0, 1 } },
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{ 3, { 0, 1, 2 } },
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{ 3, { 1, 2, 3 } },
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{ 3, { 2, 3, 4 } },
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{ 3, { 3, 4, 5 } },
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{ 3, { 4, 5, 6 } },
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{ 3, { 5, 6, 7 } },
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{ 3, { 6, 7, 0 } }
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}, upper[8] = {
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{ 1, { 1, 0, 0 } },
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{ 2, { 1, 2, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 2, { 4, 5, 0 } },
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{ 1, { 5, 0, 0 } },
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{ 2, { 1, 5, 0 } }
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},
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left[8] = {
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 2, { 2, 3, 0 } },
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{ 1, { 3, 0, 0 } },
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{ 2, { 3, 7, 0 } },
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{ 1, { 7, 0, 0 } },
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{ 2, { 7, 0, 0 } }
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},
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right[8] = {
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{ 1, { 7, 0, 0 } },
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{ 2, { 3, 7, 0 } },
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{ 1, { 3, 0, 0 } },
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{ 2, { 3, 4, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 2, { 6, 7, 0 } }
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},
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lower[8] = {
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{ 0, { 0, 0, 0 } },
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{ 2, { 0, 1, 0 } },
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{ 1, { 1, 0, 0 } },
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{ 2, { 1, 5, 0 } },
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{ 1, { 5, 0, 0 } },
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{ 2, { 5, 6, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } }
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},
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upleft[8] = {
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 1, { 3, 0, 0 } },
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{ 2, { 1, 3, 0 } },
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{ 1, { 1, 0, 0 } }
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},
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upright[8] = {
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{ 2, { 3, 5, 0 } },
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{ 1, { 3, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 1, { 5, 0, 0 } }
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},
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lowleft[8] = {
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{ 3, { 7, 0, 1 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 1, { 1, 0, 0 } },
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{ 2, { 1, 7, 0 } },
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{ 1, { 7, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } }
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},
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lowright[8] = {
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{ 0, { 0, 0, 0 } },
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{ 1, { 7, 0, 0 } },
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{ 2, { 5, 7, 0 } },
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{ 1, { 5, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } },
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{ 0, { 0, 0, 0 } }
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};
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static const char flavor[] = {
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'O', '*', '#', '$', '%', '0', '@', '~'
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};
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static const short xinc[] = {
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1, 1, 1, 0, -1, -1, -1, 0
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}, yinc[] = {
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-1, 0, 1, 1, 1, 0, -1, -1
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};
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static struct worm {
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int orientation, head;
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short *xpos, *ypos;
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} *worm;
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static volatile sig_atomic_t sig_caught = 0;
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int main(int, char **);
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static void nomem(void) __dead;
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static void onsig(int);
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int
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main(int argc, char *argv[])
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{
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int x, y, h, n;
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struct worm *w;
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const struct options *op;
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short *ip;
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int CO, LI, last, bottom, ch, length, number, trail;
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short **ref;
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const char *field;
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char *mp;
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unsigned int delay = 20000;
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mp = NULL;
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length = 16;
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number = 3;
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trail = ' ';
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field = NULL;
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while ((ch = getopt(argc, argv, "d:fl:n:t")) != -1)
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switch(ch) {
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case 'd':
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if ((delay = (unsigned int)strtoul(optarg, NULL, 10)) < 1 || delay > 1000)
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errx(1, "invalid delay (1-1000)");
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delay *= 1000; /* ms -> us */
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break;
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case 'f':
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field = "WORM";
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break;
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case 'l':
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if ((length = atoi(optarg)) < 2 || length > 1024) {
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errx(1, "invalid length (%d - %d).",
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2, 1024);
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}
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break;
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case 'n':
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if ((number = atoi(optarg)) < 1) {
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errx(1, "invalid number of worms.");
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}
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break;
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case 't':
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trail = '.';
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break;
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case '?':
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default:
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(void)fprintf(stderr,
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"usage: worms [-ft] [-d delay] [-l length] [-n number]\n");
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exit(1);
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}
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if (!(worm = malloc((size_t)number *
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sizeof(struct worm))) || !(mp = malloc((size_t)1024)))
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nomem();
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if (!initscr())
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errx(0, "couldn't initialize screen");
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curs_set(0);
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CO = COLS;
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LI = LINES;
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last = CO - 1;
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bottom = LI - 1;
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if (!(ip = malloc((size_t)(LI * CO * sizeof(short)))))
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nomem();
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if (!(ref = malloc((size_t)(LI * sizeof(short *)))))
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nomem();
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for (n = 0; n < LI; ++n) {
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ref[n] = ip;
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ip += CO;
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}
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for (ip = ref[0], n = LI * CO; --n >= 0;)
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*ip++ = 0;
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for (n = number, w = &worm[0]; --n >= 0; w++) {
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w->orientation = w->head = 0;
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if (!(ip = malloc((size_t)(length * sizeof(short)))))
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nomem();
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w->xpos = ip;
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for (x = length; --x >= 0;)
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*ip++ = -1;
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if (!(ip = malloc((size_t)(length * sizeof(short)))))
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nomem();
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w->ypos = ip;
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for (y = length; --y >= 0;)
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*ip++ = -1;
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}
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(void)signal(SIGHUP, onsig);
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(void)signal(SIGINT, onsig);
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(void)signal(SIGQUIT, onsig);
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(void)signal(SIGTSTP, onsig);
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(void)signal(SIGTERM, onsig);
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if (field) {
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const char *p = field;
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for (y = LI; --y >= 0;) {
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for (x = CO; --x >= 0;) {
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addch(*p++);
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if (!*p)
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p = field;
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}
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refresh();
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}
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}
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for (;;) {
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refresh();
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if (sig_caught) {
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endwin();
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exit(0);
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}
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if (delay) {
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if (delay % 1000000 != 0)
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usleep(delay % 1000000);
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if (delay >= 1000000)
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sleep(delay / 1000000);
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}
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for (n = 0, w = &worm[0]; n < number; n++, w++) {
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if ((x = w->xpos[h = w->head]) < 0) {
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mvaddch(y = w->ypos[h] = bottom,
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x = w->xpos[h] = 0,
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flavor[n % sizeof(flavor)]);
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ref[y][x]++;
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}
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else
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y = w->ypos[h];
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if (++h == length)
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h = 0;
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if (w->xpos[w->head = h] >= 0) {
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int x1, y1;
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x1 = w->xpos[h];
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y1 = w->ypos[h];
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if (--ref[y1][x1] == 0) {
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mvaddch(y1, x1, trail);
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}
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}
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op = &(!x ? (!y ? upleft : (y == bottom ? lowleft : left)) : (x == last ? (!y ? upright : (y == bottom ? lowright : right)) : (!y ? upper : (y == bottom ? lower : normal))))[w->orientation];
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switch (op->nopts) {
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case 0:
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refresh();
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abort();
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return(1);
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case 1:
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w->orientation = op->opts[0];
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break;
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default:
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w->orientation =
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op->opts[(int)random() % op->nopts];
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}
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mvaddch(y += yinc[w->orientation],
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x += xinc[w->orientation],
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flavor[n % sizeof(flavor)]);
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ref[w->ypos[h] = y][w->xpos[h] = x]++;
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}
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}
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}
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static void
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onsig(int signo __unused)
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{
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sig_caught = 1;
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}
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static void
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nomem(void)
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{
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errx(1, "not enough memory.");
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}
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