Fix typo.

[bsdgames-darwin.git] / worm / worm.c

diff --git a/worm/worm.c b/worm/worm.c
index 25d84c3b2e67c0da4279b8300ef2e31c9e328fce..225ed0a1f6c0819bd2b9cf39dc02366da3ee5418 100644 (file)
--- a/worm/worm.c
+++ b/worm/worm.c
@@ -1,4 +1,4 @@
-/*     $NetBSD: worm.c,v 1.17 1999/10/26 06:35:49 cgd Exp $    */
+/*     $NetBSD: worm.c,v 1.31 2015/08/17 17:17:01 dholland Exp $       */

 
 /*
  * Copyright (c) 1980, 1993
 
 /*
  * Copyright (c) 1980, 1993


@@ -12,11 +12,7 @@
  * 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.
  * 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.
  *
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *


@@ -35,15 +31,15 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
 
 #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
 #endif /* not lint */
 
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)worm.c     8.1 (Berkeley) 5/31/93";
 #else

-__RCSID("$NetBSD: worm.c,v 1.17 1999/10/26 06:35:49 cgd Exp $");
+__RCSID("$NetBSD: worm.c,v 1.31 2015/08/17 17:17:01 dholland Exp $");

 #endif
 #endif /* not lint */
 
 #endif
 #endif /* not lint */
 


@@ -60,67 +56,89 @@ __RCSID("$NetBSD: worm.c,v 1.17 1999/10/26 06:35:49 cgd Exp $");
 #include <termios.h>
 #include <unistd.h>
 
 #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)
 
 #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;
 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
 
 int

-main(argc, argv)
-       int argc;
-       char **argv;
+main(int argc, char **argv)

 {
 
        /* Revoke setgid privileges */
 {
 
        /* Revoke setgid privileges */

-       setregid(getgid(), getgid());
+       setgid(getgid());

 
 

-       if (argc == 2)
-               start_len = atoi(argv[1]);
-       if ((start_len <= 0) || (start_len > 500))
-               start_len = LENGTH;

        setbuf(stdout, outbuf);
        srand(getpid());
        signal(SIGALRM, wake);
        signal(SIGINT, leave);
        signal(SIGQUIT, leave);
        setbuf(stdout, outbuf);
        srand(getpid());
        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();
        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))
+               start_len = LENGTH;

        stw = newwin(1, COLS-1, 0, 0);
        tv = newwin(LINES-1, COLS-1, 1, 0);
        box(tv, '*', '*');
        stw = newwin(1, COLS-1, 0, 0);
        tv = newwin(LINES-1, COLS-1, 1, 0);
        box(tv, '*', '*');


@@ -148,46 +166,46 @@ main(argc, argv)
        }
 }
 
        }
 }
 

-void
-life()
+static void
+life(void)

 {
        struct body *bp, *np;
 {
        struct body *bp, *np;

-       int i;
+       int i, j = 1;

 
        np = NULL;
        head = newlink();
 
        np = NULL;
        head = newlink();

-       if (head == NULL)
-               errx(1, "out of memory");
-       head->x = start_len+2;
-       head->y = 12;
+       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();
        head->next = NULL;
        display(head, HEAD);
        for (i = 0, bp = head; i < start_len; i++, bp = np) {
                np = newlink();

-               if (np == NULL)
-                       errx(1, "out of memory");

                np->next = bp;
                bp->prev = np;
                np->next = bp;
                bp->prev = np;

-               np->x = bp->x - 1;
-               np->y = bp->y;
+               if (((bp->x <= 2) && (j == 1)) || ((bp->x >= COLS-4) && (j == -1))) {
+                       j *= -1;
+                       np->x = bp->x;
+                       np->y = bp->y + 1;
+               } else {
+                       np->x = bp->x - j;
+                       np->y = bp->y;
+               }

                display(np, BODY);
        }
        tail = np;
        tail->prev = NULL;
                display(np, BODY);
        }
        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);
 }
 
 {
        wmove(tv, pos->y, pos->x);
        waddch(tv, chr);
 }
 

-void
-leave(dummy)
-       int dummy;
+static void
+leave(int dummy)

 {
        endwin();
 
 {
        endwin();
 


@@ -198,35 +216,39 @@ leave(dummy)
        exit(0);
 }
 
        exit(0);
 }
 

-void
-wake(dummy)
-       int dummy __attribute__((__unused__));
+static void
+wake(int dummy)

 {
        signal(SIGALRM, wake);
        fflush(stdout);
        process(lastch);
 }
 
 {
        signal(SIGALRM, wake);
        fflush(stdout);
        process(lastch);
 }
 

-int
-rnd(range)
-       int range;
+static int
+rnd(int range)

 {
        return abs((rand()>>5)+(rand()>>5)) % 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 {
        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) != ' ');
 }
 
                bp->x = rnd(COLS-3) + 1;
                wmove(tv, bp->y, bp->x);
        } while(winch(tv) != ' ');
 }
 

-void
-prize()
+static void
+prize(void)

 {
        int value;
 
 {
        int value;
 


@@ -236,9 +258,8 @@ prize()
        wrefresh(tv);
 }
 
        wrefresh(tv);
 }
 

-void
-process(ch)
-       int ch;
+static void
+process(int ch)

 {
        int x,y;
        struct body *nh;
 {
        int x,y;
        struct body *nh;


@@ -295,6 +316,7 @@ process(ch)
                nh = tail->next;
                free(tail);
                tail = nh;
                nh = tail->next;
                free(tail);
                tail = nh;

+               visible_len--;

        }
        else growing--;
        display(head, BODY);
        }
        else growing--;
        display(head, BODY);


@@ -305,14 +327,12 @@ process(ch)
                prize();
                score += growing;
                running = 0;
                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();
                wprintw(stw, "Score: %3d", score);
                wrefresh(stw);
        }
        else if(ch != ' ') crash();
        nh = newlink();

-       if (nh == NULL)
-               errx(1, "out of memory");

        nh->next = NULL;
        nh->prev = head;
        head->next = nh;
        nh->next = NULL;
        nh->prev = head;
        head->next = nh;


@@ -320,6 +340,7 @@ process(ch)
        nh->x = x;
        display(nh, HEAD);
        head = nh;
        nh->x = x;
        display(nh, HEAD);
        head = nh;

+       visible_len++;

        if (!(slow && running))
        {
                wmove(tv, head->y, head->x);
        if (!(slow && running))
        {
                wmove(tv, head->y, head->x);


@@ -329,14 +350,14 @@ process(ch)
                alarm(1);
 }
 
                alarm(1);
 }
 

-void
-crash()
+static void
+crash(void)

 {
        leave(0);
 }
 
 {
        leave(0);
 }
 

-void
-setup()
+static void
+setup(void)

 {
        clear();
        refresh();
 {
        clear();
        refresh();