written by David Riggle and Edward Wang; add Berkeley specific copyright

[unix-history] / usr / src / games / sail / parties.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/

#ifndef lint
static char sccsid[] = "@(#)parties.c   5.2 (Berkeley) %G%";
#endif /* not lint */

#include "externs.h"

meleeing(from, to)
struct ship *from;
register struct ship *to;
{
       register struct BP *p = from->file->OBP;
       register struct BP *q = p + NBP;

       for (; p < q; p++)
               if (p->turnsent && p->toship == to)
                       return 1;
       return 0;
}

boarding(from, isdefense)
register struct ship *from;
char isdefense;
{
       register struct BP *p = isdefense ? from->file->DBP : from->file->OBP;
       register struct BP *q = p + NBP;

       for (; p < q; p++)
               if (p->turnsent)
                       return 1;
       return 0;
}

unboard(ship, to, isdefense)
register struct ship *ship, *to;
register char isdefense;
{
       register struct BP *p = isdefense ? ship->file->DBP : ship->file->OBP;
       register n;

       for (n = 0; n < NBP; p++, n++)
               if (p->turnsent && (p->toship == to || isdefense || ship == to))
                       Write(isdefense ? W_DBP : W_OBP, ship, 0, n, 0, 0, 0);
}