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dr_4.c revision 1.2 
      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[] = "from: @(#)dr_4.c	5.4 (Berkeley) 6/1/90";*/
     36 static char rcsid[] = "$Id: dr_4.c,v 1.2 1993/08/01 18:51:49 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 #include "externs.h"
     40 
     41 ungrap(from, to)
     42 register struct ship *from, *to;
     43 {
     44 	register k;
     45 	char friend;
     46 
     47 	if ((k = grappled2(from, to)) == 0)
     48 		return;
     49 	friend = capship(from)->nationality == capship(to)->nationality;
     50 	while (--k >= 0) {
     51 		if (friend || die() < 3) {
     52 			cleangrapple(from, to, 0);
     53 			makesignal(from, "ungrappling %s (%c%c)", to);
     54 		}
     55 	}
     56 }
     57 
     58 grap(from, to)
     59 register struct ship *from, *to;
     60 {
     61 	if (capship(from)->nationality != capship(to)->nationality && die() > 2)
     62 		return;
     63 	Write(W_GRAP, from, 0, to->file->index, 0, 0, 0);
     64 	Write(W_GRAP, to, 0, from->file->index, 0, 0, 0);
     65 	makesignal(from, "grappled with %s (%c%c)", to);
     66 }
     67