1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1989, 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__SCCSID("@(#)sigsetops.c	8.1 (Berkeley) 6/4/93");
34__FBSDID("$FreeBSD$");
35
36#include <errno.h>
37#include <signal.h>
38
39int
40sigaddset(sigset_t *set, int signo)
41{
42
43	if (signo <= 0 || signo > _SIG_MAXSIG) {
44		errno = EINVAL;
45		return (-1);
46	}
47	set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
48	return (0);
49}
50
51int
52sigdelset(sigset_t *set, int signo)
53{
54
55	if (signo <= 0 || signo > _SIG_MAXSIG) {
56		errno = EINVAL;
57		return (-1);
58	}
59	set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
60	return (0);
61}
62
63int
64sigemptyset(sigset_t *set)
65{
66	int i;
67
68	for (i = 0; i < _SIG_WORDS; i++)
69		set->__bits[i] = 0;
70	return (0);
71}
72
73int
74sigfillset(sigset_t *set)
75{
76	int i;
77
78	for (i = 0; i < _SIG_WORDS; i++)
79		set->__bits[i] = ~0U;
80	return (0);
81}
82
83int
84sigorset(sigset_t *dest, const sigset_t *left, const sigset_t *right)
85{
86	int i;
87
88	for (i = 0; i < _SIG_WORDS; i++)
89		dest->__bits[i] = left->__bits[i] | right->__bits[i];
90	return (0);
91}
92
93int
94sigandset(sigset_t *dest, const sigset_t *left, const sigset_t *right)
95{
96	int i;
97
98	for (i = 0; i < _SIG_WORDS; i++)
99		dest->__bits[i] = left->__bits[i] & right->__bits[i];
100	return (0);
101}
102
103int
104sigisemptyset(const sigset_t *set)
105{
106	int i;
107
108	for (i = 0; i < _SIG_WORDS; i++)
109		if (set->__bits[i] != 0)
110			return (0);
111	return (1);
112}
113
114int
115sigismember(const sigset_t *set, int signo)
116{
117
118	if (signo <= 0 || signo > _SIG_MAXSIG) {
119		errno = EINVAL;
120		return (-1);
121	}
122	return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
123}
124