1: /*      $NetBSD: dr_4.c,v 1.13 2003/08/07 09:37:42 agc 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 1.13 2003/08/07 09:37:42 agc 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 $$", to);
   57:                 }
   58:         }
   59: }
   60: 
   61: void
   62: grap(struct ship *from, struct ship *to)
   63: {
   64:         if (capship(from)->nationality != capship(to)->nationality && dieroll() > 2)
   65:                 return;
   66:         Write(W_GRAP, from, to->file->index, 0, 0, 0);
   67:         Write(W_GRAP, to, from->file->index, 0, 0, 0);
   68:         makesignal(from, "grappled with $$", to);
   69: }