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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)sigsetops.c	8.1 (Berkeley) 6/4/93
30 */
31
32#if defined(LIBC_SCCS) && !defined(lint)
33static char sccsid[] = "@(#)sigsetops.c	8.1 (Berkeley) 6/4/93";
34#endif /* LIBC_SCCS and not lint */
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: stable/11/lib/libc/gen/sigsetops.c 355898 2019-12-19 02:09:16Z kevans $");
37
38#include <errno.h>
39#include <signal.h>
40
41int
42sigaddset(sigset_t *set, int signo)
43{
44
45	if (signo <= 0 || signo > _SIG_MAXSIG) {
46		errno = EINVAL;
47		return (-1);
48	}
49	set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
50	return (0);
51}
52
53int
54sigdelset(sigset_t *set, int signo)
55{
56
57	if (signo <= 0 || signo > _SIG_MAXSIG) {
58		errno = EINVAL;
59		return (-1);
60	}
61	set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
62	return (0);
63}
64
65int
66sigemptyset(sigset_t *set)
67{
68	int i;
69
70	for (i = 0; i < _SIG_WORDS; i++)
71		set->__bits[i] = 0;
72	return (0);
73}
74
75int
76sigfillset(sigset_t *set)
77{
78	int i;
79
80	for (i = 0; i < _SIG_WORDS; i++)
81		set->__bits[i] = ~0U;
82	return (0);
83}
84
85int
86sigorset(sigset_t *dest, const sigset_t *left, const sigset_t *right)
87{
88	int i;
89
90	for (i = 0; i < _SIG_WORDS; i++)
91		dest->__bits[i] = left->__bits[i] | right->__bits[i];
92	return (0);
93}
94
95int
96sigandset(sigset_t *dest, const sigset_t *left, const sigset_t *right)
97{
98	int i;
99
100	for (i = 0; i < _SIG_WORDS; i++)
101		dest->__bits[i] = left->__bits[i] & right->__bits[i];
102	return (0);
103}
104
105int
106sigisemptyset(const sigset_t *set)
107{
108	int i;
109
110	for (i = 0; i < _SIG_WORDS; i++)
111		if (set->__bits[i] != 0)
112			return (0);
113	return (1);
114}
115
116int
117sigismember(const sigset_t *set, int signo)
118{
119
120	if (signo <= 0 || signo > _SIG_MAXSIG) {
121		errno = EINVAL;
122		return (-1);
123	}
124	return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
125}
126