github.com/afumu/libc@v0.0.6/musl/src/ctype/iswcntrl.c (about)

     1  #include <wctype.h>
     2  
     3  int iswcntrl(wint_t wc)
     4  {
     5  	return (unsigned)wc < 32
     6  	    || (unsigned)(wc-0x7f) < 33
     7  	    || (unsigned)(wc-0x2028) < 2
     8  	    || (unsigned)(wc-0xfff9) < 3;
     9  }
    10  
    11  int __iswcntrl_l(wint_t c, locale_t l)
    12  {
    13  	return iswcntrl(c);
    14  }
    15  
    16  weak_alias(__iswcntrl_l, iswcntrl_l);