sail/dr_4.c

   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 }