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ISWCNTRL(3)                Linux Programmer's Manual               ISWCNTRL(3)
NAME
       iswcntrl - test for control wide character
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
       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 |
       +-----------+---------------+----------------+
CONFORMING TO
       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)
COLOPHON
       This page is part of release 4.15 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.
GNU                               2015-08-08                       ISWCNTRL(3)