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
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 |
POSIX.1-2001, POSIX.1-2008, C99.
NOTES¶
The behavior of
iswcntrl() depends on the
LC_CTYPE category of the
current locale.
SEE ALSO¶
iscntrl(3),
iswctype(3)
COLOPHON¶
This page is part of release 4.10 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/.