/*-
 * Copyright (c) 1989, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)sigsetops.c 8.1 (Berkeley) 6/4/93
 *
 * @(#)sigsetops.c      8.1 (Berkeley) 6/4/93
 * $FreeBSD: src/lib/libc/gen/sigsetops.c,v 1.7 1999/10/02 19:37:14 marcel Exp $
 * $DragonFly: src/lib/libc/gen/sigsetops.c,v 1.3 2005/11/13 00:07:42 swildner Exp $
 */

#include <errno.h>
#include <signal.h>

int
sigaddset(sigset_t *set, int signo)
{

        if (signo <= 0 || signo > _SIG_MAXSIG) {
                errno = EINVAL;
                return (-1);
        }
        set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
        return (0);
}

int
sigdelset(sigset_t *set, int signo)
{

        if (signo <= 0 || signo > _SIG_MAXSIG) {
                errno = EINVAL;
                return (-1);
        }
        set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
        return (0);
}

int
sigemptyset(sigset_t *set)
{
        int i;

        for (i = 0; i < _SIG_WORDS; i++)
                set->__bits[i] = 0;
        return (0);
}

int
sigfillset(sigset_t *set)
{
        int i;

        for (i = 0; i < _SIG_WORDS; i++)
                set->__bits[i] = ~0U;
        return (0);
}

int
sigismember(const sigset_t *set, int signo)
{

        if (signo <= 0 || signo > _SIG_MAXSIG) {
                errno = EINVAL;
                return (-1);
        }
        return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
}