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.
CONFORMING TO
C99.
NOTES
The behavior of iswcntrl()
depends on the LC_CTYPE
category of the current locale.
This page is part of release 3.52 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man−pages/.
Copyright (c) Bruno Haible <haible@clisp.cons.org>
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References consulted:
GNU glibc-2 source code and manual
Dinkumware C library reference http://www.dinkumware.com/
OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
ISO/IEC 9899:1999