src/ctype/iswcntrl.c


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#include <wchar.h>
#include <wctype.h>

int iswcntrl(wint_t wc)
{
	return (unsigned)wc < 32
	    || (unsigned)(wc-0x7f) < 33
	    || (unsigned)(wc-0x2028) < 2
	    || (unsigned)(wc-0xfff9) < 3;
}