games/sail/dr_4.c

   1 /*-
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)dr_4.c   8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/sail/dr_4.c,v 1.5 1999/11/30 03:49:32 billf Exp $
  31  * $DragonFly: src/games/sail/dr_4.c,v 1.3 2006/09/03 17:33:13 pavalos Exp $
  32  */
  33
  34 #include "externs.h"
  35
  36 void
  37 ungrap(struct ship *from, struct ship *to)
  38 {
  39         int k;
  40         char friend;
  41
  42         if ((k = grappled2(from, to)) == 0)
  43                 return;
  44         friend = capship(from)->nationality == capship(to)->nationality;
  45         while (--k >= 0) {
  46                 if (friend || die() < 3) {
  47                         cleangrapple(from, to, 0);
  48                         makesignal(from, "ungrappling %s (%c%c)", to);
  49                 }
  50         }
  51 }
  52
  53 void
  54 grap(struct ship *from, struct ship *to)
  55 {
  56         if (capship(from)->nationality != capship(to)->nationality && die() > 2)
  57                 return;
  58         Write(W_GRAP, from, to->file->index, 0, 0, 0);
  59         Write(W_GRAP, to, from->file->index, 0, 0, 0);
  60         makesignal(from, "grappled with %s (%c%c)", to);
  61 }