/*      $NetBSD: dr_4.c,v 1.15 2009/03/14 22:52:52 dholland Exp $       */

/*
* Copyright (c) 1983, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 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. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)dr_4.c      8.2 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: dr_4.c,v 1.15 2009/03/14 22:52:52 dholland Exp $");
#endif
#endif /* not lint */

#include <stdlib.h>
#include "extern.h"

void
ungrap(struct ship *from, struct ship *to)
{
       int k;
       char friend;

       if ((k = grappled2(from, to)) == 0)
               return;
       friend = capship(from)->nationality == capship(to)->nationality;
       while (--k >= 0) {
               if (friend || dieroll() < 3) {
                       cleangrapple(from, to, 0);
                       makesignal(from, "ungrappling $$", to);
               }
       }
}

void
grap(struct ship *from, struct ship *to)
{
       if (capship(from)->nationality != capship(to)->nationality &&
           dieroll() > 2)
               return;
       send_grap(from, to->file->index);
       send_grap(to, from->file->index);
       makesignal(from, "grappled with $$", to);
}