sail/parties.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[] = "from: @(#)parties.c   5.4 (Berkeley) 6/1/90";*/
  36 static char rcsid[] = "$Id: parties.c,v 1.2 1993/08/01 18:51:42 mycroft Exp $";
  37 #endif /* not lint */
  38
  39 #include "externs.h"
  40
  41 meleeing(from, to)
  42 struct ship *from;
  43 register struct ship *to;
  44 {
  45         register struct BP *p = from->file->OBP;
  46         register struct BP *q = p + NBP;
  47
  48         for (; p < q; p++)
  49                 if (p->turnsent && p->toship == to)
  50                         return 1;
  51         return 0;
  52 }
  53
  54 boarding(from, isdefense)
  55 register struct ship *from;
  56 char isdefense;
  57 {
  58         register struct BP *p = isdefense ? from->file->DBP : from->file->OBP;
  59         register struct BP *q = p + NBP;
  60
  61         for (; p < q; p++)
  62                 if (p->turnsent)
  63                         return 1;
  64         return 0;
  65 }
  66
  67 unboard(ship, to, isdefense)
  68 register struct ship *ship, *to;
  69 register char isdefense;
  70 {
  71         register struct BP *p = isdefense ? ship->file->DBP : ship->file->OBP;
  72         register n;
  73
  74         for (n = 0; n < NBP; p++, n++)
  75                 if (p->turnsent && (p->toship == to || isdefense || ship == to))
  76                         Write(isdefense ? W_DBP : W_OBP, ship, 0, n, 0, 0, 0);
  77 }