libc-top-half/musl/src/signal/sigisemptyset.c


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#define _GNU_SOURCE
#include <signal.h>
#include <string.h>

int sigisemptyset(const sigset_t *set)
{
	for (size_t i=0; i<_NSIG/8/sizeof *set->__bits; i++)
		if (set->__bits[i]) return 0;
	return 1;
}