/*      $OpenBSD: dr_5.c,v 1.5 2016/01/08 20:26:33 mestre Exp $ */
/*      $NetBSD: dr_5.c,v 1.3 1995/04/22 10:36:51 cgd Exp $     */

/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "extern.h"

void
subtract(struct ship *from, int totalfrom, int crewfrom[3],
    struct ship *fromcap, int pcfrom)
{
        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, crewfrom[0], crewfrom[1], crewfrom[2], 0);
        } else if (totalfrom) {
                pcfrom -= totalfrom;
                pcfrom = pcfrom < 0 ? 0 : pcfrom;
                Write(W_PCREW, from, pcfrom, 0, 0, 0);
        }
}

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