iswcntrl(3) Library Functions Manual iswcntrl(3) NAME iswcntrl - test for control wide character LIBRARY Standard C library (libc, -lc) SYNOPSIS #include <wctype.h> int iswcntrl(wint_t wc); DESCRIPTION The iswcntrl() function is the wide-character equivalent of the iscn- trl(3) function. It tests whether wc is a wide character belonging to the wide-character class "cntrl". The wide-character class "cntrl" is disjoint from the wide-character class "print" and therefore also disjoint from its subclasses "graph", "alpha", "upper", "lower", "digit", "xdigit", "punct". For an unsigned char c, iscntrl(c) implies iswcntrl(btowc(c)), but not vice versa. RETURN VALUE The iswcntrl() function returns nonzero if wc is a wide character be- longing to the wide-character class "cntrl". Otherwise, it returns zero. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌─────────────────────────────────────┬───────────────┬────────────────┐ │Interface │ Attribute │ Value │ ├─────────────────────────────────────┼───────────────┼────────────────┤ │iswcntrl() │ Thread safety │ MT-Safe locale │ └─────────────────────────────────────┴───────────────┴────────────────┘ STANDARDS POSIX.1-2001, POSIX.1-2008, C99. NOTES The behavior of iswcntrl() depends on the LC_CTYPE category of the cur- rent locale. SEE ALSO iscntrl(3), iswctype(3) Linux man-pages 6.03 2022-12-15 iswcntrl(3)
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