3.19 iswblank, iswblank_l—blank wide character test

Synopsis

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

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

Description
iswblank is a function which classifies wide-character values that are categorized as blank.

iswblank_l is like iswblank 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
iswblank, iswblank_l return non-zero if c is a blank wide character.

Portability
iswblank is C99. iswblank_l is POSIX-1.2008.

No supporting OS subroutines are required.