Merge from vendor branch BZIP:
[dragonfly.git] / lib / libc / gen / sigsetops.c
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1/*-
2 * Copyright (c) 1989, 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 * @(#)sigsetops.c 8.1 (Berkeley) 6/4/93
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34 *
35 * @(#)sigsetops.c 8.1 (Berkeley) 6/4/93
36 * $FreeBSD: src/lib/libc/gen/sigsetops.c,v 1.7 1999/10/02 19:37:14 marcel Exp $
0f52d283 37 * $DragonFly: src/lib/libc/gen/sigsetops.c,v 1.3 2005/11/13 00:07:42 swildner Exp $
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38 */
39
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40#include <errno.h>
41#include <signal.h>
42
43int
0f52d283 44sigaddset(sigset_t *set, int signo)
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45{
46
47 if (signo <= 0 || signo > _SIG_MAXSIG) {
48 errno = EINVAL;
49 return (-1);
50 }
51 set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
52 return (0);
53}
54
55int
0f52d283 56sigdelset(sigset_t *set, int signo)
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57{
58
59 if (signo <= 0 || signo > _SIG_MAXSIG) {
60 errno = EINVAL;
61 return (-1);
62 }
63 set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
64 return (0);
65}
66
67int
0f52d283 68sigemptyset(sigset_t *set)
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69{
70 int i;
71
72 for (i = 0; i < _SIG_WORDS; i++)
73 set->__bits[i] = 0;
74 return (0);
75}
76
77int
0f52d283 78sigfillset(sigset_t *set)
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79{
80 int i;
81
82 for (i = 0; i < _SIG_WORDS; i++)
83 set->__bits[i] = ~0U;
84 return (0);
85}
86
87int
0f52d283 88sigismember(const sigset_t *set, int signo)
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89{
90
91 if (signo <= 0 || signo > _SIG_MAXSIG) {
92 errno = EINVAL;
93 return (-1);
94 }
95 return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
96}