games/sail/dr_5.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. 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  * @(#)dr_5.c   8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/sail/dr_5.c,v 1.4 1999/11/30 03:49:33 billf Exp $
  35  * $DragonFly: src/games/sail/dr_5.c,v 1.3 2006/09/03 17:33:13 pavalos Exp $
  36  */
  37
  38 #include "externs.h"
  39
  40 void
  41 subtract(struct ship *from, int totalfrom, int crewfrom[3], struct ship *fromcap, int pcfrom)
  42 {
  43         int n;
  44
  45         if (fromcap == from && totalfrom) {             /* if not captured */
  46                 for (n = 0; n < 3; n++) {
  47                         if (totalfrom > crewfrom[n]) {
  48                                 totalfrom -= crewfrom[n];
  49                                 crewfrom[n] = 0;
  50                         } else {
  51                                 crewfrom[n] -= totalfrom;
  52                                 totalfrom = 0;
  53                         }
  54                 }
  55                 Write(W_CREW, from, 0, crewfrom[0], crewfrom[1], crewfrom[2], 0);
  56         } else if (totalfrom) {
  57                 pcfrom -= totalfrom;
  58                 pcfrom = pcfrom < 0 ? 0 : pcfrom;
  59                 Write(W_PCREW, from, 0, pcfrom, 0, 0, 0);
  60         }
  61 }
  62
  63 int
  64 mensent(struct ship *from, struct ship *to, int crew[3], struct ship **captured, int *pc, char isdefense)
  65 {                                       /* returns # of crew squares sent */
  66         int men = 0;
  67         int n;
  68         int c1, c2, c3;
  69         struct BP *bp;
  70
  71         *pc = from->file->pcrew;
  72         *captured = from->file->captured;
  73         crew[0] = from->specs->crew1;
  74         crew[1] = from->specs->crew2;
  75         crew[2] = from->specs->crew3;
  76         bp = isdefense ? from->file->DBP : from->file->OBP;
  77         for (n=0; n < NBP; n++, bp++) {
  78                 if (bp->turnsent && bp->toship == to)
  79                         men += bp->mensent;
  80         }
  81         if (men) {
  82                 c1 = men/100 ? crew[0] : 0;
  83                 c2 = (men%100)/10 ? crew[1] : 0;
  84                 c3 = men/10 ? crew[2] : 0;
  85                 c3 = *captured == 0 ? crew[2] : *pc;
  86         } else
  87                 c1 = c2 = c3 = 0;
  88         return(c1 + c2 + c3);
  89 }