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dr_4.c revision 1.1 
      1 /*
      2  * Copyright (c) 1983 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)dr_4.c	5.4 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     37 
     38 #include "externs.h"
     39 
     40 ungrap(from, to)
     41 register struct ship *from, *to;
     42 {
     43 	register k;
     44 	char friend;
     45 
     46 	if ((k = grappled2(from, to)) == 0)
     47 		return;
     48 	friend = capship(from)->nationality == capship(to)->nationality;
     49 	while (--k >= 0) {
     50 		if (friend || die() < 3) {
     51 			cleangrapple(from, to, 0);
     52 			makesignal(from, "ungrappling %s (%c%c)", to);
     53 		}
     54 	}
     55 }
     56 
     57 grap(from, to)
     58 register struct ship *from, *to;
     59 {
     60 	if (capship(from)->nationality != capship(to)->nationality && die() > 2)
     61 		return;
     62 	Write(W_GRAP, from, 0, to->file->index, 0, 0, 0);
     63 	Write(W_GRAP, to, 0, from->file->index, 0, 0, 0);
     64 	makesignal(from, "grappled with %s (%c%c)", to);
     65 }
     66