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370 lines
7.1 KiB
370 lines
7.1 KiB
/* $NetBSD: worm.c,v 1.25 2004/01/27 20:30:31 jsm Exp $ */ |
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/* |
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* Copyright (c) 1980, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <sys/cdefs.h> |
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#ifndef lint |
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\ |
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The Regents of the University of California. All rights reserved.\n"); |
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#endif /* not lint */ |
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#ifndef lint |
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#if 0 |
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static char sccsid[] = "@(#)worm.c 8.1 (Berkeley) 5/31/93"; |
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#else |
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__RCSID("$NetBSD: worm.c,v 1.25 2004/01/27 20:30:31 jsm Exp $"); |
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#endif |
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#endif /* not lint */ |
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/* |
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* Worm. Written by Michael Toy |
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* UCSC |
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*/ |
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#include <ctype.h> |
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#include <curses.h> |
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#include <err.h> |
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#include <signal.h> |
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#include <stdlib.h> |
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#include <termios.h> |
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#include <unistd.h> |
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#define newlink() (struct body *) malloc(sizeof (struct body)); |
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#define HEAD '@' |
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#define BODY 'o' |
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#define LENGTH 7 |
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#define RUNLEN 8 |
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#define CNTRL(p) (p-'A'+1) |
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WINDOW *tv; |
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WINDOW *stw; |
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struct body { |
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int x; |
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int y; |
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struct body *prev; |
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struct body *next; |
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} *head, *tail, goody; |
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int growing = 0; |
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int running = 0; |
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int slow = 0; |
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int score = 0; |
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int start_len = LENGTH; |
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int visible_len; |
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int lastch; |
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char outbuf[BUFSIZ]; |
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void crash(void) __attribute__((__noreturn__)); |
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void display(const struct body *, char); |
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int main(int, char **); |
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void leave(int) __attribute__((__noreturn__)); |
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void life(void); |
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void newpos(struct body *); |
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void process(int); |
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void prize(void); |
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int rnd(int); |
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void setup(void); |
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void wake(int); |
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int |
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main(argc, argv) |
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int argc; |
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char **argv; |
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{ |
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/* Revoke setgid privileges */ |
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setregid(getgid(), getgid()); |
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setbuf(stdout, outbuf); |
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srand(getpid()); |
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signal(SIGALRM, wake); |
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signal(SIGINT, leave); |
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signal(SIGQUIT, leave); |
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initscr(); |
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cbreak(); |
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noecho(); |
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#ifdef KEY_LEFT |
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keypad(stdscr, TRUE); |
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#endif |
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slow = (baudrate() <= 1200); |
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clear(); |
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if (COLS < 18 || LINES < 5) { |
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/* |
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* Insufficient room for the line with " Worm" and the |
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* score if fewer than 18 columns; insufficient room for |
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* anything much if fewer than 5 lines. |
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*/ |
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endwin(); |
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errx(1, "screen too small"); |
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} |
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if (argc == 2) |
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start_len = atoi(argv[1]); |
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if ((start_len <= 0) || (start_len > ((LINES-3) * (COLS-2)) / 3)) |
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start_len = LENGTH; |
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stw = newwin(1, COLS-1, 0, 0); |
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tv = newwin(LINES-1, COLS-1, 1, 0); |
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box(tv, '*', '*'); |
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scrollok(tv, FALSE); |
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scrollok(stw, FALSE); |
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wmove(stw, 0, 0); |
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wprintw(stw, " Worm"); |
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refresh(); |
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wrefresh(stw); |
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wrefresh(tv); |
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life(); /* Create the worm */ |
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prize(); /* Put up a goal */ |
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while(1) |
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{ |
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if (running) |
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{ |
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running--; |
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process(lastch); |
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} |
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else |
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{ |
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fflush(stdout); |
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process(getch()); |
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} |
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} |
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} |
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void |
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life() |
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{ |
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struct body *bp, *np; |
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int i, j = 1; |
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np = NULL; |
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head = newlink(); |
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if (head == NULL) |
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err(1, NULL); |
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head->x = start_len % (COLS-5) + 2; |
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head->y = LINES / 2; |
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head->next = NULL; |
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display(head, HEAD); |
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for (i = 0, bp = head; i < start_len; i++, bp = np) { |
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np = newlink(); |
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if (np == NULL) |
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err(1, NULL); |
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np->next = bp; |
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bp->prev = np; |
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if (((bp->x <= 2) && (j == 1)) || ((bp->x >= COLS-4) && (j == -1))) { |
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j *= -1; |
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np->x = bp->x; |
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np->y = bp->y + 1; |
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} else { |
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np->x = bp->x - j; |
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np->y = bp->y; |
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} |
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display(np, BODY); |
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} |
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tail = np; |
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tail->prev = NULL; |
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visible_len = start_len + 1; |
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} |
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void |
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display(pos, chr) |
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const struct body *pos; |
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char chr; |
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{ |
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wmove(tv, pos->y, pos->x); |
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waddch(tv, chr); |
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} |
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void |
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leave(dummy) |
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int dummy; |
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{ |
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endwin(); |
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if (dummy == 0){ /* called via crash() */ |
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printf("\nWell, you ran into something and the game is over.\n"); |
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printf("Your final score was %d\n\n", score); |
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} |
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exit(0); |
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} |
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void |
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wake(dummy) |
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int dummy __attribute__((__unused__)); |
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{ |
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signal(SIGALRM, wake); |
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fflush(stdout); |
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process(lastch); |
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} |
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int |
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rnd(range) |
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int range; |
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{ |
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return abs((rand()>>5)+(rand()>>5)) % range; |
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} |
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void |
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newpos(bp) |
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struct body * bp; |
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{ |
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if (visible_len == (LINES-3) * (COLS-3) - 1) { |
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endwin(); |
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printf("\nYou won!\n"); |
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printf("Your final score was %d\n\n", score); |
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exit(0); |
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} |
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do { |
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bp->y = rnd(LINES-3)+ 1; |
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bp->x = rnd(COLS-3) + 1; |
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wmove(tv, bp->y, bp->x); |
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} while(winch(tv) != ' '); |
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} |
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void |
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prize() |
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{ |
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int value; |
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value = rnd(9) + 1; |
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newpos(&goody); |
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waddch(tv, value+'0'); |
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wrefresh(tv); |
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} |
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void |
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process(ch) |
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int ch; |
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{ |
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int x,y; |
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struct body *nh; |
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alarm(0); |
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x = head->x; |
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y = head->y; |
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switch(ch) |
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{ |
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#ifdef KEY_LEFT |
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case KEY_LEFT: |
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#endif |
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case 'h': |
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x--; break; |
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#ifdef KEY_DOWN |
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case KEY_DOWN: |
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#endif |
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case 'j': |
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y++; break; |
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#ifdef KEY_UP |
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case KEY_UP: |
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#endif |
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case 'k': |
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y--; break; |
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#ifdef KEY_RIGHT |
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case KEY_RIGHT: |
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#endif |
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case 'l': |
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x++; break; |
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case 'H': x--; running = RUNLEN; ch = tolower(ch); break; |
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case 'J': y++; running = RUNLEN/2; ch = tolower(ch); break; |
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case 'K': y--; running = RUNLEN/2; ch = tolower(ch); break; |
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case 'L': x++; running = RUNLEN; ch = tolower(ch); break; |
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case '\f': setup(); return; |
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case ERR: |
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case CNTRL('C'): |
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case CNTRL('D'): |
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crash(); |
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return; |
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default: if (! running) alarm(1); |
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return; |
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} |
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lastch = ch; |
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if (growing == 0) |
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{ |
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display(tail, ' '); |
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tail->next->prev = NULL; |
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nh = tail->next; |
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free(tail); |
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tail = nh; |
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visible_len--; |
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} |
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else growing--; |
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display(head, BODY); |
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wmove(tv, y, x); |
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if (isdigit(ch = winch(tv))) |
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{ |
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growing += ch-'0'; |
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prize(); |
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score += growing; |
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running = 0; |
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wmove(stw, 0, COLS - 12); |
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wprintw(stw, "Score: %3d", score); |
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wrefresh(stw); |
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} |
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else if(ch != ' ') crash(); |
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nh = newlink(); |
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if (nh == NULL) |
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err(1, NULL); |
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nh->next = NULL; |
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nh->prev = head; |
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head->next = nh; |
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nh->y = y; |
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nh->x = x; |
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display(nh, HEAD); |
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head = nh; |
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visible_len++; |
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if (!(slow && running)) |
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{ |
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wmove(tv, head->y, head->x); |
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wrefresh(tv); |
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} |
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if (!running) |
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alarm(1); |
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} |
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void |
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crash() |
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{ |
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leave(0); |
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} |
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void |
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setup() |
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{ |
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clear(); |
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refresh(); |
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touchwin(stw); |
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wrefresh(stw); |
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touchwin(tv); |
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wrefresh(tv); |
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alarm(1); |
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}
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