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 iscntrl(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 belonging to  the  wide-
       character class "cntrl".  Otherwise, it returns zero.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │Interface                                               │ Attribute     │ Value          │
       ├────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │iswcntrl()                                              │ Thread safety │ MT-Safe locale │
       └────────────────────────────────────────────────────────┴───────────────┴────────────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C99.

NOTES

       The behavior of iswcntrl() depends on the LC_CTYPE category of the current locale.

SEE ALSO

       iscntrl(3), iswctype(3)