Add <sys/_null.h> for the definition of NULL:
[dragonfly.git] / games / trek / check_out.c
blob70d05f662a128b0fdfb72ba13134f52d8b97df0f
1 /*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
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.
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.
33 * @(#)check_out.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/trek/check_out.c,v 1.4 1999/11/30 03:49:44 billf Exp $
35 * $DragonFly: src/games/trek/check_out.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
38 # include "trek.h"
41 ** CHECK IF A DEVICE IS OUT
43 ** The indicated device is checked to see if it is disabled. If
44 ** it is, an attempt is made to use the starbase device. If both
45 ** of these fails, it returns non-zero (device is REALLY out),
46 ** otherwise it returns zero (I can get to it somehow).
48 ** It prints appropriate messages too.
51 bool
52 check_out(int device)
54 int dev;
56 dev = device;
58 /* check for device ok */
59 if (!damaged(dev))
60 return (0);
62 /* report it as being dead */
63 out(dev);
65 /* but if we are docked, we can go ahead anyhow */
66 if (Ship.cond != DOCKED)
67 return (1);
68 printf(" Using starbase %s\n", Device[dev].name);
69 return (0);