3.26 iswupper, iswupper_l—uppercase wide character test

Synopsis

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

#include <wctype.h>
int iswupper_l(wint_t c, locale_t locale);

Description
iswupper is a function which classifies wide-character values that are categorized as uppercase.

iswupper_l is like iswupper but performs the check based on the locale specified by the locale object locale. If locale is LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.

Returns
iswupper, iswupper_l return non-zero if c is an uppercase wide character.

Portability
iswupper is C99. iswupper_l is POSIX-1.2008.

No supporting OS subroutines are required.