-/* $NetBSD: worm.c,v 1.20 2001/08/29 23:25:58 jsm Exp $ */
+/* $NetBSD: worm.c,v 1.31 2015/08/17 17:17:01 dholland Exp $ */
/*
* Copyright (c) 1980, 1993
* 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
+ * 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.
*
#include <sys/cdefs.h>
#ifndef lint
-__COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
- The Regents of the University of California. All rights reserved.\n");
+__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
+ The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)worm.c 8.1 (Berkeley) 5/31/93";
#else
-__RCSID("$NetBSD: worm.c,v 1.20 2001/08/29 23:25:58 jsm Exp $");
+__RCSID("$NetBSD: worm.c,v 1.31 2015/08/17 17:17:01 dholland Exp $");
#endif
#endif /* not lint */
#include <termios.h>
#include <unistd.h>
-#define newlink() (struct body *) malloc(sizeof (struct body));
#define HEAD '@'
#define BODY 'o'
#define LENGTH 7
#define RUNLEN 8
#define CNTRL(p) (p-'A'+1)
-WINDOW *tv;
-WINDOW *stw;
struct body {
int x;
int y;
struct body *prev;
struct body *next;
-} *head, *tail, goody;
-int growing = 0;
-int running = 0;
-int slow = 0;
-int score = 0;
-int start_len = LENGTH;
-int lastch;
-char outbuf[BUFSIZ];
-
-void crash __P((void)) __attribute__((__noreturn__));
-void display __P((const struct body *, char));
-int main __P((int, char **));
-void leave __P((int)) __attribute__((__noreturn__));
-void life __P((void));
-void newpos __P((struct body *));
-void process __P((int));
-void prize __P((void));
-int rnd __P((int));
-void setup __P((void));
-void wake __P((int));
+};
+
+static WINDOW *tv;
+static WINDOW *stw;
+static struct body *head, *tail, goody;
+static int growing = 0;
+static int running = 0;
+static int slow = 0;
+static int score = 0;
+static int start_len = LENGTH;
+static int visible_len;
+static int lastch;
+static char outbuf[BUFSIZ];
+
+int main(int, char **);
+static void crash(void) __dead;
+static void display(const struct body *, char);
+static void leave(int) __dead;
+static void life(void);
+static void newpos(struct body *);
+static void process(int);
+static void prize(void);
+static int rnd(int);
+static void setup(void);
+static void wake(int);
+
+static struct body *
+newlink(void)
+{
+ struct body *b;
+
+ b = malloc(sizeof(*b));
+ if (b == NULL) {
+ err(EXIT_FAILURE, NULL);
+ }
+ return b;
+}
int
-main(argc, argv)
- int argc;
- char **argv;
+main(int argc, char **argv)
{
/* Revoke setgid privileges */
signal(SIGALRM, wake);
signal(SIGINT, leave);
signal(SIGQUIT, leave);
- initscr();
- crmode();
+ if (!initscr())
+ errx(0, "couldn't initialize screen");
+ cbreak();
noecho();
#ifdef KEY_LEFT
keypad(stdscr, TRUE);
#endif
slow = (baudrate() <= 1200);
clear();
+ if (COLS < 18 || LINES < 5) {
+ /*
+ * Insufficient room for the line with " Worm" and the
+ * score if fewer than 18 columns; insufficient room for
+ * anything much if fewer than 5 lines.
+ */
+ endwin();
+ errx(1, "screen too small");
+ }
if (argc == 2)
start_len = atoi(argv[1]);
if ((start_len <= 0) || (start_len > ((LINES-3) * (COLS-2)) / 3))
}
}
-void
-life()
+static void
+life(void)
{
struct body *bp, *np;
int i, j = 1;
np = NULL;
head = newlink();
- if (head == NULL)
- err(1, NULL);
head->x = start_len % (COLS-5) + 2;
head->y = LINES / 2;
head->next = NULL;
display(head, HEAD);
for (i = 0, bp = head; i < start_len; i++, bp = np) {
np = newlink();
- if (np == NULL)
- err(1, NULL);
np->next = bp;
bp->prev = np;
if (((bp->x <= 2) && (j == 1)) || ((bp->x >= COLS-4) && (j == -1))) {
}
tail = np;
tail->prev = NULL;
+ visible_len = start_len + 1;
}
-void
-display(pos, chr)
- const struct body *pos;
- char chr;
+static void
+display(const struct body *pos, char chr)
{
wmove(tv, pos->y, pos->x);
waddch(tv, chr);
}
-void
-leave(dummy)
- int dummy;
+static void
+leave(int dummy)
{
endwin();
exit(0);
}
-void
-wake(dummy)
- int dummy __attribute__((__unused__));
+static void
+wake(int dummy)
{
signal(SIGALRM, wake);
fflush(stdout);
process(lastch);
}
-int
-rnd(range)
- int range;
+static int
+rnd(int range)
{
return abs((rand()>>5)+(rand()>>5)) % range;
}
-void
-newpos(bp)
- struct body * bp;
+static void
+newpos(struct body *bp)
{
+ if (visible_len == (LINES-3) * (COLS-3) - 1) {
+ endwin();
+
+ printf("\nYou won!\n");
+ printf("Your final score was %d\n\n", score);
+ exit(0);
+ }
do {
- bp->y = rnd(LINES-3)+ 2;
+ bp->y = rnd(LINES-3)+ 1;
bp->x = rnd(COLS-3) + 1;
wmove(tv, bp->y, bp->x);
} while(winch(tv) != ' ');
}
-void
-prize()
+static void
+prize(void)
{
int value;
wrefresh(tv);
}
-void
-process(ch)
- int ch;
+static void
+process(int ch)
{
int x,y;
struct body *nh;
nh = tail->next;
free(tail);
tail = nh;
+ visible_len--;
}
else growing--;
display(head, BODY);
prize();
score += growing;
running = 0;
- wmove(stw, 0, 68);
+ wmove(stw, 0, COLS - 12);
wprintw(stw, "Score: %3d", score);
wrefresh(stw);
}
else if(ch != ' ') crash();
nh = newlink();
- if (nh == NULL)
- err(1, NULL);
nh->next = NULL;
nh->prev = head;
head->next = nh;
nh->x = x;
display(nh, HEAD);
head = nh;
+ visible_len++;
if (!(slow && running))
{
wmove(tv, head->y, head->x);
alarm(1);
}
-void
-crash()
+static void
+crash(void)
{
leave(0);
}
-void
-setup()
+static void
+setup(void)
{
clear();
refresh();
git.ckatri.com / bsdgames-darwin.git / blobdiff