iswblank(3) Library Functions Manual iswblank(3) NAME iswblank - test for whitespace wide character LIBRARY Standard C library (libc, -lc) SYNOPSIS #include <wctype.h> int iswblank(wint_t wc); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): iswblank(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L DESCRIPTION The iswblank() function is the wide-character equivalent of the is- blank(3) function. It tests whether wc is a wide character belonging to the wide-character class "blank". The wide-character class "blank" is a subclass of the wide-character class "space". Being a subclass of the wide-character class "space", the wide-charac- ter class "blank" is disjoint from the wide-character class "graph" and therefore also disjoint from its subclasses "alnum", "alpha", "upper", "lower", "digit", "xdigit", "punct". The wide-character class "blank" always contains at least the space character and the control character '\t'. RETURN VALUE The iswblank() function returns nonzero if wc is a wide character be- longing to the wide-character class "blank". Otherwise, it returns zero. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌─────────────────────────────────────┬───────────────┬────────────────┐ │Interface │ Attribute │ Value │ ├─────────────────────────────────────┼───────────────┼────────────────┤ │iswblank() │ Thread safety │ MT-Safe locale │ └─────────────────────────────────────┴───────────────┴────────────────┘ STANDARDS POSIX.1-2001, POSIX.1-2008. NOTES The behavior of iswblank() depends on the LC_CTYPE category of the cur- rent locale. SEE ALSO isblank(3), iswctype(3) Linux man-pages 6.03 2023-02-05 iswblank(3)
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