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- /*
- * Copyright (c) 1980 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
- 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 5.9 (Berkeley) 2/28/91";
- #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)
-
- char *tcp;
- 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;
-
- 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;
- void onsig();
- short **ref;
- char *AL, *BC, *CM, *EI, *HO, *IC, *IM, *IP, *SR;
- char *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(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] [-length #] [-number #]\n");
- exit(1);
- }
-
- if (!(term = getenv("TERM"))) {
- (void)fprintf(stderr, "worms: no TERM environment variable.\n");
- exit(1);
- }
- if (!(worm = (struct worm *)malloc((u_int)number *
- sizeof(struct worm))) || !(mp = malloc((u_int)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);
- #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)))))
- nomem();
- if (!(ref = (short **)malloc((u_int)(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 = (short *)malloc((u_int)(length * sizeof(short)))))
- nomem();
- w->xpos = ip;
- for (x = length; --x >= 0;)
- *ip++ = -1;
- if (!(ip = (short *)malloc((u_int)(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()
- {
- tputs(tgetstr("cl", &tcp), 1, fputchar);
- tputs(tgetstr("te", &tcp), 1, fputchar);
- exit(0);
- }
-
- fputchar(c)
- char c;
- {
- putchar(c);
- }
-
- nomem()
- {
- (void)fprintf(stderr, "worms: not enough memory.\n");
- exit(1);
- }
-