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

[unix-history] / usr / src / games / sail / dr_5.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[] = "@(#)dr_5.c      5.2 (Berkeley) %G%";
#endif /* not lint */

#include "externs.h"

subtract(from, totalfrom, crewfrom, fromcap, pcfrom)
struct ship *from, *fromcap;
int pcfrom;
register int  totalfrom, crewfrom[3];
{
       register int n;

       if (fromcap == from && totalfrom) {             /* if not captured */
               for (n = 0; n < 3; n++) {
                       if (totalfrom > crewfrom[n]) {
                               totalfrom -= crewfrom[n];
                               crewfrom[n] = 0;
                       } else {
                               crewfrom[n] -= totalfrom;
                               totalfrom = 0;
                       }
               }
               Write(W_CREW, from, 0, crewfrom[0], crewfrom[1], crewfrom[2], 0);
       } else if (totalfrom) {
               pcfrom -= totalfrom;
               pcfrom = pcfrom < 0 ? 0 : pcfrom;
               Write(W_PCREW, from, 0, pcfrom, 0, 0, 0);
       }
}

mensent(from, to, crew, captured, pc, isdefense)
struct ship *from, *to, **captured;
int crew[3], *pc;
char isdefense;
{                                       /* returns # of crew squares sent */
       int men = 0;
       register int n;
       int c1, c2, c3;
       register struct BP *bp;

       *pc = from->file->pcrew;
       *captured = from->file->captured;
       crew[0] = from->specs->crew1;
       crew[1] = from->specs->crew2;
       crew[2] = from->specs->crew3;
       bp = isdefense ? from->file->DBP : from->file->OBP;
       for (n=0; n < NBP; n++, bp++) {
               if (bp->turnsent && bp->toship == to)
                       men += bp->mensent;
       }
       if (men) {
               c1 = men/100 ? crew[0] : 0;
               c2 = (men%100)/10 ? crew[1] : 0;
               c3 = men/10 ? crew[2] : 0;
               c3 = *captured == 0 ? crew[2] : *pc;
       } else
               c1 = c2 = c3 = 0;
       return(c1 + c2 + c3);
}