OpenBSD-4.6/games/worms/worms.c
/* $OpenBSD: worms.c,v 1.18 2007/09/02 15:19:09 deraadt Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* 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. 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)worms.c 8.1 (Berkeley) 5/31/93";
#else
static char rcsid[] = "$OpenBSD: worms.c,v 1.18 2007/09/02 15:19:09 deraadt Exp $";
#endif
#endif /* not lint */
/*
*
* @@@ @@@ @@@@@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@
* @@@ @@@ @@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@
* @@@ @@@ @@@@ @@@@ @@@@ @@@@ @@@ @@@@
* @@@ @@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@@ @@@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@@@@@@@@@@ @@@@ @@@@ @@@ @@@ @@@ @@@
* @@@@ @@@@ @@@@@@@@@@@@ @@@ @@@ @@@ @@@
* @@ @@ @@@@@@@@@@ @@@ @@@ @@@ @@@
*
* Eric P. Scott
* Caltech High Energy Physics
* October, 1980
*
*/
#include <sys/types.h>
#include <curses.h>
#include <err.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
static const struct options {
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[] = {
'O', '*', '#', '$', '%', '0', '@', '~'
};
static const short xinc[] = {
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;
void nomem(void);
void onsig(int);
int
main(int argc, char *argv[])
{
int x, y, h, n;
struct worm *w;
const struct options *op;
short *ip;
int CO, LI, last, bottom, ch, length, number, trail;
short **ref;
const char *field;
struct termios term;
speed_t speed;
u_int delay = 0;
/* set default delay based on terminal baud rate */
if (tcgetattr(STDOUT_FILENO, &term) == 0 &&
(speed = cfgetospeed(&term)) > B9600)
delay = (speed / B9600) - 1;
length = 16;
number = 3;
trail = ' ';
field = NULL;
while ((ch = getopt(argc, argv, "d:fhl:n:t")) != -1)
switch(ch) {
case 'd':
if ((delay = (u_int)strtoul(optarg, (char **)NULL, 10)) < 1
|| delay > 1000)
errx(1, "invalid delay (1-1000)");
delay *= 1000; /* ms -> us */
break;
case 'f':
field = "WORM";
break;
case 'l':
if ((length = atoi(optarg)) < 2 || length > 1024)
errx(1, "invalid length (%d - %d).", 2, 1024);
break;
case 'n':
if ((number = atoi(optarg)) < 1 || number > 100)
errx(1, "invalid number of worms (%d - %d).",
1, 100);
break;
case 't':
trail = '.';
break;
case '?': case 'h':
default:
(void)fprintf(stderr,
"usage: worms [-ft] [-d delay] [-l length] [-n number]\n");
exit(1);
}
srandomdev();
if (!(worm = calloc((size_t)number, sizeof(struct worm))))
nomem();
initscr();
curs_set(0);
CO = COLS;
LI = LINES;
last = CO - 1;
bottom = LI - 1;
if (!(ip = malloc((size_t)(LI * CO * sizeof(short)))) ||
!(ref = calloc((size_t)LI, sizeof(short *)))) {
endwin();
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;
if (!(ip = calloc((size_t)length, sizeof(short)))) {
endwin();
nomem();
}
w->xpos = ip;
for (x = length; --x >= 0;)
*ip++ = -1;
if (!(ip = calloc((size_t)length, sizeof(short)))) {
endwin();
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;
for (y = LI; --y >= 0;) {
for (x = CO; --x >= 0;) {
addch(*p++);
if (!*p)
p = field;
}
refresh();
}
}
for (;;) {
refresh();
if (sig_caught) {
endwin();
exit(0);
}
if (delay) usleep(delay);
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)]);
ref[y][x]++;
}
else
y = w->ypos[h];
if (++h == length)
h = 0;
if (w->xpos[w->head = h] >= 0) {
int x1, y1;
x1 = w->xpos[h];
y1 = w->ypos[h];
if (--ref[y1][x1] == 0)
mvaddch(y1, x1, trail);
}
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:
endwin();
return(1);
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)]);
ref[w->ypos[h] = y][w->xpos[h] = x]++;
}
}
}
void
onsig(int signo)
{
sig_caught = 1;
}
void
nomem(void)
{
errx(1, "not enough memory.");
}