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      1 /*	$NetBSD: dr_4.c,v 1.15 2009/03/14 22:52:52 dholland 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)dr_4.c	8.2 (Berkeley) 4/28/95";
     36 #else
     37 __RCSID("$NetBSD: dr_4.c,v 1.15 2009/03/14 22:52:52 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <stdlib.h>
     42 #include "extern.h"
     43 
     44 void
     45 ungrap(struct ship *from, struct ship *to)
     46 {
     47 	int k;
     48 	char friend;
     49 
     50 	if ((k = grappled2(from, to)) == 0)
     51 		return;
     52 	friend = capship(from)->nationality == capship(to)->nationality;
     53 	while (--k >= 0) {
     54 		if (friend || dieroll() < 3) {
     55 			cleangrapple(from, to, 0);
     56 			makesignal(from, "ungrappling $$", to);
     57 		}
     58 	}
     59 }
     60 
     61 void
     62 grap(struct ship *from, struct ship *to)
     63 {
     64 	if (capship(from)->nationality != capship(to)->nationality &&
     65 	    dieroll() > 2)
     66 		return;
     67 	send_grap(from, to->file->index);
     68 	send_grap(to, from->file->index);
     69 	makesignal(from, "grappled with $$", to);
     70 }
     71