move msghdr and cmsghdr out of bits/socket.h

[musl.git] / src / signal / sigismember.c

#include <signal.h>

int sigismember(const sigset_t *set, int sig)
{
        unsigned s = sig-1;
        if (s >= _NSIG-1) return 0;
        return !!(set->__bits[s/8/sizeof *set->__bits] & 1UL<<(s&8*sizeof *set->__bits-1));
}