xref: /netbsd/games/sail/dr_5.c (revision bf9ec67e)
1 /*	$NetBSD: dr_5.c,v 1.11 2001/02/05 01:10:09 christos Exp $	*/
2 
3 /*
4  * Copyright (c) 1983, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *	This product includes software developed by the University of
18  *	California, Berkeley and its contributors.
19  * 4. Neither the name of the University nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 #include <sys/cdefs.h>
37 #ifndef lint
38 #if 0
39 static char sccsid[] = "@(#)dr_5.c	8.2 (Berkeley) 4/28/95";
40 #else
41 __RCSID("$NetBSD: dr_5.c,v 1.11 2001/02/05 01:10:09 christos Exp $");
42 #endif
43 #endif /* not lint */
44 
45 #include <sys/types.h>
46 #include "extern.h"
47 
48 void
49 subtract(struct ship *from, struct ship *fromcap, int totalfrom, int *crewfrom, int pcfrom)
50 {
51 	int n;
52 
53 	if (fromcap == from && totalfrom) {		/* if not captured */
54 		for (n = 0; n < 3; n++) {
55 			if (totalfrom > crewfrom[n]) {
56 				totalfrom -= crewfrom[n];
57 				crewfrom[n] = 0;
58 			} else {
59 				crewfrom[n] -= totalfrom;
60 				totalfrom = 0;
61 			}
62 		}
63 		Write(W_CREW, from, crewfrom[0], crewfrom[1], crewfrom[2], 0);
64 	} else if (totalfrom) {
65 		pcfrom -= totalfrom;
66 		pcfrom = pcfrom < 0 ? 0 : pcfrom;
67 		Write(W_PCREW, from, pcfrom, 0, 0, 0);
68 	}
69 }
70 
71 int
72 mensent(struct ship *from, struct ship *to, int *crew, struct ship **captured, int *pc, int isdefense)
73 {					/* returns # of crew squares sent */
74 	int men = 0;
75 	int n;
76 	int c1, c2, c3;
77 	struct BP *bp;
78 
79 	*pc = from->file->pcrew;
80 	*captured = from->file->captured;
81 	crew[0] = from->specs->crew1;
82 	crew[1] = from->specs->crew2;
83 	crew[2] = from->specs->crew3;
84 	bp = isdefense ? from->file->DBP : from->file->OBP;
85 	for (n=0; n < NBP; n++, bp++) {
86 		if (bp->turnsent && bp->toship == to)
87 			men += bp->mensent;
88 	}
89 	if (men) {
90 		c1 = men/100 ? crew[0] : 0;
91 		c2 = (men%100)/10 ? crew[1] : 0;
92 		c3 = men/10 ? crew[2] : 0;
93 		c3 = *captured == 0 ? crew[2] : *pc;
94 	} else
95 		c1 = c2 = c3 = 0;
96 	return(c1 + c2 + c3);
97 }
98