NetBSD/games/worms/worms.c

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/* $NetBSD: worms.c,v 1.11 1999/07/30 02:23:27 hubertf Exp $ */
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/*
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* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
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*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
#ifndef lint
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#if 0
static char sccsid[] = "@(#)worms.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: worms.c,v 1.11 1999/07/30 02:23:27 hubertf Exp $");
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#endif
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#endif /* not lint */
/*
*
* @@@ @@@ @@@@@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@
* @@@ @@@ @@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@
* @@@ @@@ @@@@ @@@@ @@@@ @@@@ @@@ @@@@
* @@@ @@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@@ @@@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@@@@@@@@@@ @@@@ @@@@ @@@ @@@ @@@ @@@
* @@@@ @@@@ @@@@@@@@@@@@ @@@ @@@ @@@ @@@
* @@ @@ @@@@@@@@@@ @@@ @@@ @@@ @@@
*
* Eric P. Scott
* Caltech High Energy Physics
* October, 1980
*
*/
#include <sys/types.h>
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#include <curses.h>
#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;
int opts[3];
}
normal[8] = {
{ 3, { 7, 0, 1 } },
{ 3, { 0, 1, 2 } },
{ 3, { 1, 2, 3 } },
{ 3, { 2, 3, 4 } },
{ 3, { 3, 4, 5 } },
{ 3, { 4, 5, 6 } },
{ 3, { 5, 6, 7 } },
{ 3, { 6, 7, 0 } }
}, upper[8] = {
{ 1, { 1, 0, 0 } },
{ 2, { 1, 2, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 2, { 4, 5, 0 } },
{ 1, { 5, 0, 0 } },
{ 2, { 1, 5, 0 } }
},
left[8] = {
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 2, { 2, 3, 0 } },
{ 1, { 3, 0, 0 } },
{ 2, { 3, 7, 0 } },
{ 1, { 7, 0, 0 } },
{ 2, { 7, 0, 0 } }
},
right[8] = {
{ 1, { 7, 0, 0 } },
{ 2, { 3, 7, 0 } },
{ 1, { 3, 0, 0 } },
{ 2, { 3, 4, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 2, { 6, 7, 0 } }
},
lower[8] = {
{ 0, { 0, 0, 0 } },
{ 2, { 0, 1, 0 } },
{ 1, { 1, 0, 0 } },
{ 2, { 1, 5, 0 } },
{ 1, { 5, 0, 0 } },
{ 2, { 5, 6, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } }
},
upleft[8] = {
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 1, { 3, 0, 0 } },
{ 2, { 1, 3, 0 } },
{ 1, { 1, 0, 0 } }
},
upright[8] = {
{ 2, { 3, 5, 0 } },
{ 1, { 3, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 1, { 5, 0, 0 } }
},
lowleft[8] = {
{ 3, { 7, 0, 1 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 1, { 1, 0, 0 } },
{ 2, { 1, 7, 0 } },
{ 1, { 7, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } }
},
lowright[8] = {
{ 0, { 0, 0, 0 } },
{ 1, { 7, 0, 0 } },
{ 2, { 5, 7, 0 } },
{ 1, { 5, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } },
{ 0, { 0, 0, 0 } }
};
static const char flavor[] = {
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'O', '*', '#', '$', '%', '0', '@', '~'
};
static const short xinc[] = {
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1, 1, 1, 0, -1, -1, -1, 0
}, yinc[] = {
-1, 0, 1, 1, 1, 0, -1, -1
};
static struct worm {
int orientation, head;
short *xpos, *ypos;
} *worm;
volatile sig_atomic_t sig_caught = 0;
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int main __P((int, char **));
void nomem __P((void)) __attribute__((__noreturn__));
void onsig __P((int));
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int
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main(argc, argv)
int argc;
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char *argv[];
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{
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int x, y, h, n;
struct worm *w;
const struct options *op;
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short *ip;
int CO, LI, last, bottom, ch, length, number, trail;
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short **ref;
const char *field;
char *mp;
unsigned int delay = 0;
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mp = NULL;
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length = 16;
number = 3;
trail = ' ';
field = NULL;
while ((ch = getopt(argc, argv, "d:fl:n:t")) != -1)
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switch(ch) {
case 'd':
if ((delay = (unsigned int)strtoul(optarg, (char **)NULL, 10)) < 1 || delay > 1000)
errx(1, "invalid delay (1-1000)");
delay *= 1000; /* ms -> us */
break;
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case 'f':
field = "WORM";
break;
case 'l':
if ((length = atoi(optarg)) < 2 || length > 1024) {
errx(1, "invalid length (%d - %d).",
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2, 1024);
}
break;
case 'n':
if ((number = atoi(optarg)) < 1) {
errx(1, "invalid number of worms.");
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}
break;
case 't':
trail = '.';
break;
case '?':
default:
(void)fprintf(stderr,
"usage: worms [-ft] [-d delay] [-l length] [-n number]\n");
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exit(1);
}
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if (!(worm = malloc((size_t)number *
sizeof(struct worm))) || !(mp = malloc((size_t)1024)))
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nomem();
initscr();
CO = COLS;
LI = LINES;
last = CO - 1;
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();
for (n = 0; n < LI; ++n) {
ref[n] = ip;
ip += CO;
}
for (ip = ref[0], n = LI * CO; --n >= 0;)
*ip++ = 0;
for (n = number, w = &worm[0]; --n >= 0; w++) {
w->orientation = w->head = 0;
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if (!(ip = malloc((size_t)(length * sizeof(short)))))
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nomem();
w->xpos = ip;
for (x = length; --x >= 0;)
*ip++ = -1;
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if (!(ip = malloc((size_t)(length * sizeof(short)))))
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nomem();
w->ypos = ip;
for (y = length; --y >= 0;)
*ip++ = -1;
}
(void)signal(SIGHUP, onsig);
(void)signal(SIGINT, onsig);
(void)signal(SIGQUIT, onsig);
(void)signal(SIGSTOP, onsig);
(void)signal(SIGTSTP, onsig);
(void)signal(SIGTERM, onsig);
if (field) {
const char *p = field;
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for (y = LI; --y >= 0;) {
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for (x = CO; --x >= 0;) {
addch(*p++);
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if (!*p)
p = field;
}
refresh();
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}
}
for (;;) {
refresh();
if (sig_caught) {
endwin();
exit(0);
}
if (delay) usleep(delay);
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for (n = 0, w = &worm[0]; n < number; n++, w++) {
if ((x = w->xpos[h = w->head]) < 0) {
mvaddch(y = w->ypos[h] = bottom,
x = w->xpos[h] = 0,
flavor[n % sizeof(flavor)]);
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ref[y][x]++;
}
else
y = w->ypos[h];
if (++h == length)
h = 0;
if (w->xpos[w->head = h] >= 0) {
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int x1, y1;
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x1 = w->xpos[h];
y1 = w->ypos[h];
if (--ref[y1][x1] == 0) {
mvaddch(y1, x1, trail);
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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];
switch (op->nopts) {
case 0:
refresh();
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abort();
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return(1);
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case 1:
w->orientation = op->opts[0];
break;
default:
w->orientation =
op->opts[(int)random() % op->nopts];
}
mvaddch(y += yinc[w->orientation],
x += xinc[w->orientation],
flavor[n % sizeof(flavor)]);
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ref[w->ypos[h] = y][w->xpos[h] = x]++;
}
}
}
void
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onsig(signo)
int signo __attribute__((__unused__));
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{
sig_caught = 1;
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}
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void
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nomem()
{
errx(1, "not enough memory.");
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}