4.3BSD-Tahoe/usr/src/games/worms.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)worms.c 5.5 (Berkeley) 6/27/88";
#endif /* not lint */
/*
*
* @@@ @@@ @@@@@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@
* @@@ @@@ @@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@
* @@@ @@@ @@@@ @@@@ @@@@ @@@@ @@@ @@@@
* @@@ @@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@@ @@@@ @@@@ @@@ @@@ @@@ @@@ @@@ @@@
* @@@@@@@@@@@@ @@@@ @@@@ @@@ @@@ @@@ @@@
* @@@@ @@@@ @@@@@@@@@@@@ @@@ @@@ @@@ @@@
* @@ @@ @@@@@@@@@@ @@@ @@@ @@@ @@@
*
* Eric P. Scott
* Caltech High Energy Physics
* October, 1980
*
*/
#include <sys/types.h>
#include <stdio.h>
#ifdef USG
#include <termio.h>
#else
#include <sgtty.h>
#endif
#include <signal.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)
static char *TE;
static int fputchar();
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[40];
main(argc, argv)
int argc;
char **argv;
{
extern int optind;
extern short ospeed;
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,
onsig();
short **ref;
char *AL, *BC, *CM, *EI, *HO, *IC, *IM, *IP, *SR, *tcp,
*field, tcb[100], *mp, *malloc(), *getenv(), *tgetstr(),
*tgoto();
long random();
#ifdef USG
struct termio sg;
#else
struct sgttyb sg;
#endif
length = 16;
number = 3;
trail = ' ';
field = NULL;
while ((ch = getopt(argc, argv, "fl:n:t")) != EOF)
switch((char)ch) {
case 'f':
field = "WORM";
break;
case 'l':
if ((length = atoi(optarg)) < 2 || length > 1024) {
fprintf(stderr, "%s: invalid length; range %d - %d.\n", *argv, 2, 1024);
exit(1);
}
break;
case 'n':
if ((number = atoi(optarg)) < 1 || number > 40) {
fprintf(stderr, "%s: invalid number of worms; range %d - %d.\n", *argv, 1, 40);
exit(1);
}
break;
case 't':
trail = '.';
break;
case '?':
default:
fprintf(stderr, "usage: %s [-ft] [-length #] [-number #]\n", *argv);
exit(1);
}
if (!(term = getenv("TERM"))) {
fprintf(stderr, "%s: TERM: parameter not set\n", *argv);
exit(1);
}
if (!(mp = malloc((u_int)1024))) {
fprintf(stderr, "%s: out of space.\n", *argv);
exit(1);
}
if (tgetent(mp, term) <= 0) {
fprintf(stderr, "%s: %s: unknown terminal type\n", *argv, term);
exit(1);
}
tcp = tcb;
if (!(CM = tgetstr("cm", &tcp))) {
fprintf(stderr, "%s: terminal not capable of cursor motion\n", *argv);
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);
TE = tgetstr("te", &tcp);
UP = tgetstr("up", &tcp);
#ifdef USG
ioctl(1, TCGETA, &sg);
ospeed = sg.c_cflag&CBAUD;
#else
gtty(1, &sg);
ospeed = sg.sg_ospeed;
#endif
Wrap = tgetflag("am");
if (!(ip = (short *)malloc((u_int)(LI * CO * sizeof(short))))) {
fprintf(stderr, "%s: out of memory\n", *argv);
exit(1);
}
if (!(ref = (short **)malloc((u_int)(LI * sizeof(short *))))) {
fprintf(stderr, "%s: out of memory\n", *argv);
exit(1);
}
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 = (short *)malloc((u_int)(length * sizeof(short))))) {
fprintf(stderr, "%s: out of memory\n", *argv);
exit(1);
}
w->xpos = ip;
for (x = length; --x >= 0;)
*ip++ = -1;
if (!(ip = (short *)malloc((u_int)(length * sizeof(short))))) {
fprintf(stderr, "%s: out of memory\n", *argv);
exit(1);
}
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 % 6]);
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 % 6]);
ref[w->ypos[h] = y][w->xpos[h] = x]++;
}
}
}
static
onsig()
{
tputs(TE, 1, fputchar);
exit(0);
}
static
fputchar(c)
char c;
{
putchar(c);
}