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dr_4.c revision 1.6 
      1 /*	$NetBSD: dr_4.c,v 1.6 1997/10/13 21:03:37 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)dr_4.c	8.2 (Berkeley) 4/28/95";
     40 #else
     41 __RCSID("$NetBSD: dr_4.c,v 1.6 1997/10/13 21:03:37 christos Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include "extern.h"
     46 #include <stdlib.h>
     47 
     48 void
     49 ungrap(from, to)
     50 struct ship *from, *to;
     51 {
     52 	int k;
     53 	char friend;
     54 
     55 	if ((k = grappled2(from, to)) == 0)
     56 		return;
     57 	friend = capship(from)->nationality == capship(to)->nationality;
     58 	while (--k >= 0) {
     59 		if (friend || die() < 3) {
     60 			cleangrapple(from, to, 0);
     61 			makesignal(from, "ungrappling $$", to);
     62 		}
     63 	}
     64 }
     65 
     66 void
     67 grap(from, to)
     68 struct ship *from, *to;
     69 {
     70 	if (capship(from)->nationality != capship(to)->nationality && die() > 2)
     71 		return;
     72 	Write(W_GRAP, from, 0, to->file->index, 0, 0, 0);
     73 	Write(W_GRAP, to, 0, from->file->index, 0, 0, 0);
     74 	makesignal(from, "grappled with $$", to);
     75 }
     76