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shield.c revision 1.10 
      1 /*	$NetBSD: shield.c,v 1.10 2009/05/24 21:44:56 dholland Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)shield.c	8.1 (Berkeley) 5/31/93";
     36 #else
     37 __RCSID("$NetBSD: shield.c,v 1.10 2009/05/24 21:44:56 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <stdio.h>
     42 #include "trek.h"
     43 #include "getpar.h"
     44 
     45 /*
     46 **  SHIELD AND CLOAKING DEVICE CONTROL
     47 **
     48 **	'f' is one for auto shield up (in case of Condition RED),
     49 **	zero for shield control, and negative one for cloaking
     50 **	device control.
     51 **
     52 **	Called with an 'up' or 'down' on the same line, it puts
     53 **	the shields/cloak into the specified mode.  Otherwise it
     54 **	reports to the user the current mode, and asks if she wishes
     55 **	to change.
     56 **
     57 **	This is not a free move.  Hits that occur as a result of
     58 **	this move appear as though the shields are half up/down,
     59 **	so you get partial hits.
     60 */
     61 
     62 const struct cvntab Udtab[] = {
     63 	{ "u",		"p",		(cmdfun)1,	0 },
     64 	{ "d",		"own",		(cmdfun)0,	0 },
     65 	{ NULL,		NULL,		NULL,		0 }
     66 };
     67 
     68 void
     69 shield(int f)
     70 {
     71 	int		i;
     72 	const struct cvntab	*r;
     73 	char		s[100];
     74 	const char	*device, *dev2, *dev3;
     75 	int		ind;
     76 	char		*stat;
     77 
     78 	if (f > 0 && (Ship.shldup || damaged(SRSCAN)))
     79 		return;
     80 	if (f < 0) {
     81 		/* cloaking device */
     82 		if (Ship.ship == QUEENE) {
     83 			printf("Ye Faire Queene does not have the cloaking device.\n");
     84 			return;
     85 		}
     86 		device = "Cloaking device";
     87 		dev2 = "is";
     88 		ind = CLOAK;
     89 		dev3 = "it";
     90 		stat = &Ship.cloaked;
     91 	} else {
     92 		/* shields */
     93 		device = "Shields";
     94 		dev2 = "are";
     95 		dev3 = "them";
     96 		ind = SHIELD;
     97 		stat = &Ship.shldup;
     98 	}
     99 	if (damaged(ind)) {
    100 		if (f <= 0)
    101 			out(ind);
    102 		return;
    103 	}
    104 	if (Ship.cond == DOCKED) {
    105 		printf("%s %s down while docked\n", device, dev2);
    106 		return;
    107 	}
    108 	if (f <= 0 && !testnl()) {
    109 		r = getcodpar("Up or down", Udtab);
    110 		i = (long) r->value;
    111 	} else {
    112 		if (*stat)
    113 			(void)sprintf(s, "%s %s up.  Do you want %s down", device, dev2, dev3);
    114 		else
    115 			(void)sprintf(s, "%s %s down.  Do you want %s up", device, dev2, dev3);
    116 		if (!getynpar(s))
    117 			return;
    118 		i = !*stat;
    119 	}
    120 	if (*stat == i) {
    121 		printf("%s already ", device);
    122 		if (i)
    123 			printf("up\n");
    124 		else
    125 			printf("down\n");
    126 		return;
    127 	}
    128 	if (i) {
    129 		if (f >= 0)
    130 			Ship.energy -= Param.shupengy;
    131 		else
    132 			Ship.cloakgood = 0;
    133 	}
    134 	Move.free = 0;
    135 	if (f >= 0)
    136 		Move.shldchg = 1;
    137 	*stat = i;
    138 	return;
    139 }
    140