3.18 iswcntrl, iswcntrl_l—control wide character test

Synopsis

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

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

Description
iswcntrl is a function which classifies wide-character values that are categorized as control characters.

iswcntrl_l is like iswcntrl 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
iswcntrl, iswcntrl_l return non-zero if c is a control wide character.

Portability
iswcntrl is C99. iswcntrl_l is POSIX-1.2008.

No supporting OS subroutines are required.