4.4BSD/usr/src/games/worms/worms.c
/*
* 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. 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.
*/
#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
static char sccsid[] = "@(#)worms.c 8.1 (Berkeley) 5/31/93";
#endif /* not lint */
/*
*
* @@@ @@@ @@@@@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@
* @@@ @@@ @@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@
* @@@ @@@ @@@@ @@@@ @@@@ @@@@ @@@ @@@@
* @@@ @@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@@ @@@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@@@@@@@@@@ @@@@ @@@@ @@@ @@@ @@@ @@@
* @@@@ @@@@ @@@@@@@@@@@@ @@@ @@@ @@@ @@@
* @@ @@ @@@@@@@@@@ @@@ @@@ @@@ @@@
*
* Eric P. Scott
* Caltech High Energy Physics
* October, 1980
*
*/
#include <sys/types.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static 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 } }
};
#define cursor(c, r) tputs(tgoto(CM, c, r), 1, fputchar)
char *tcp;
static char flavor[] = {
'O', '*', '#', '$', '%', '0', '@', '~'
};
static 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;
void fputchar __P((int));
void onsig __P((int));
char *tgetstr __P((char *, char **));
char *tgoto __P((char *, int, int));
int tputs __P((char *, int, void (*)(int)));
int
main(argc, argv)
int argc;
char *argv[];
{
extern int optind;
extern char *optarg, *UP;
register int x, y, h, n;
register struct worm *w;
register struct options *op;
register short *ip;
register char *term;
int CO, IN, LI, last, bottom, ch, length, number, trail, Wrap;
short **ref;
char *AL, *BC, *CM, *EI, *HO, *IC, *IM, *IP, *SR;
char *field, tcb[100], *mp;
long random();
length = 16;
number = 3;
trail = ' ';
field = NULL;
while ((ch = getopt(argc, argv, "fl:n:t")) != EOF)
switch(ch) {
case 'f':
field = "WORM";
break;
case 'l':
if ((length = atoi(optarg)) < 2 || length > 1024) {
(void)fprintf(stderr,
"worms: invalid length (%d - %d).\n",
2, 1024);
exit(1);
}
break;
case 'n':
if ((number = atoi(optarg)) < 1) {
(void)fprintf(stderr,
"worms: invalid number of worms.\n");
exit(1);
}
break;
case 't':
trail = '.';
break;
case '?':
default:
(void)fprintf(stderr,
"usage: worms [-ft] [-l length] [-n number]\n");
exit(1);
}
if (!(term = getenv("TERM"))) {
(void)fprintf(stderr, "worms: no TERM environment variable.\n");
exit(1);
}
if (!(worm = malloc((size_t)number *
sizeof(struct worm))) || !(mp = malloc((size_t)1024)))
nomem();
if (tgetent(mp, term) <= 0) {
(void)fprintf(stderr, "worms: %s: unknown terminal type.\n",
term);
exit(1);
}
tcp = tcb;
if (!(CM = tgetstr("cm", &tcp))) {
(void)fprintf(stderr,
"worms: terminal incapable of cursor motion.\n");
exit(1);
}
AL = tgetstr("al", &tcp);
BC = tgetflag("bs") ? "\b" : tgetstr("bc", &tcp);
if ((CO = tgetnum("co")) <= 0)
CO = 80;
last = CO - 1;
EI = tgetstr("ei", &tcp);
HO = tgetstr("ho", &tcp);
IC = tgetstr("ic", &tcp);
IM = tgetstr("im", &tcp);
IN = tgetflag("in");
IP = tgetstr("ip", &tcp);
if ((LI = tgetnum("li")) <= 0)
LI = 24;
bottom = LI - 1;
SR = tgetstr("sr", &tcp);
UP = tgetstr("up", &tcp);
Wrap = tgetflag("am");
if (!(ip = malloc((size_t)(LI * CO * sizeof(short)))))
nomem();
if (!(ref = malloc((size_t)(LI * sizeof(short *)))))
nomem();
for (n = 0; n < LI; ++n) {
ref[n] = ip;
ip += CO;
}
for (ip = ref[0], n = LI * CO; --n >= 0;)
*ip++ = 0;
if (Wrap)
ref[bottom][last] = 1;
for (n = number, w = &worm[0]; --n >= 0; w++) {
w->orientation = w->head = 0;
if (!(ip = malloc((size_t)(length * sizeof(short)))))
nomem();
w->xpos = ip;
for (x = length; --x >= 0;)
*ip++ = -1;
if (!(ip = malloc((size_t)(length * sizeof(short)))))
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);
tputs(tgetstr("ti", &tcp), 1, fputchar);
tputs(tgetstr("cl", &tcp), 1, fputchar);
if (field) {
register char *p = field;
for (y = bottom; --y >= 0;) {
for (x = CO; --x >= 0;) {
fputchar(*p++);
if (!*p)
p = field;
}
if (!Wrap)
fputchar('\n');
(void)fflush(stdout);
}
if (Wrap) {
if (IM && !IN) {
for (x = last; --x > 0;) {
fputchar(*p++);
if (!*p)
p = field;
}
y = *p++;
if (!*p)
p = field;
fputchar(*p);
if (BC)
tputs(BC, 1, fputchar);
else
cursor(last - 1, bottom);
tputs(IM, 1, fputchar);
if (IC)
tputs(IC, 1, fputchar);
fputchar(y);
if (IP)
tputs(IP, 1, fputchar);
tputs(EI, 1, fputchar);
}
else if (SR || AL) {
if (HO)
tputs(HO, 1, fputchar);
else
cursor(0, 0);
if (SR)
tputs(SR, 1, fputchar);
else
tputs(AL, LI, fputchar);
for (x = CO; --x >= 0;) {
fputchar(*p++);
if (!*p)
p = field;
}
}
else for (x = last; --x >= 0;) {
fputchar(*p++);
if (!*p)
p = field;
}
}
else for (x = CO; --x >= 0;) {
fputchar(*p++);
if (!*p)
p = field;
}
}
for (;;) {
(void)fflush(stdout);
for (n = 0, w = &worm[0]; n < number; n++, w++) {
if ((x = w->xpos[h = w->head]) < 0) {
cursor(x = w->xpos[h] = 0,
y = w->ypos[h] = bottom);
fputchar(flavor[n % sizeof(flavor)]);
ref[y][x]++;
}
else
y = w->ypos[h];
if (++h == length)
h = 0;
if (w->xpos[w->head = h] >= 0) {
register int x1, y1;
x1 = w->xpos[h];
y1 = w->ypos[h];
if (--ref[y1][x1] == 0) {
cursor(x1, y1);
if (trail)
fputchar(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:
(void)fflush(stdout);
abort();
return;
case 1:
w->orientation = op->opts[0];
break;
default:
w->orientation =
op->opts[(int)random() % op->nopts];
}
cursor(x += xinc[w->orientation],
y += yinc[w->orientation]);
if (!Wrap || x != last || y != bottom)
fputchar(flavor[n % sizeof(flavor)]);
ref[w->ypos[h] = y][w->xpos[h] = x]++;
}
}
}
void
onsig(signo)
int signo;
{
tputs(tgetstr("cl", &tcp), 1, fputchar);
tputs(tgetstr("te", &tcp), 1, fputchar);
exit(0);
}
void
fputchar(c)
int c;
{
(void)putchar(c);
}
nomem()
{
(void)fprintf(stderr, "worms: not enough memory.\n");
exit(1);
}