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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

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GNU 2015-08-08 ISWCNTRL(3)