3.30 towupper—translate wide characters to uppercase

Synopsis

     #include <wctype.h>
     wint_t towupper(wint_t c);
     

Description
towupper is a function which converts lowercase wide characters to uppercase, leaving all other characters unchanged.

Returns
towupper returns the uppercase equivalent of c when it is a lowercase wide character, otherwise, it returns the input character.

Portability
towupper is C99.

No supporting OS subroutines are required.