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

     1  #include <wctype.h>
     2  
     3  #undef iswdigit
     4  
     5  int iswdigit(wint_t wc)
     6  {
     7  	return (unsigned)wc-'0' < 10;
     8  }
     9  
    10  int __iswdigit_l(wint_t c, locale_t l)
    11  {
    12  	return iswdigit(c);
    13  }
    14  
    15  weak_alias(__iswdigit_l, iswdigit_l);