3. Library calls (functions within program libraries)

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ISWCNTRL

Section: Linux Programmer's Manual (3)
Updated: 2015-08-08
Index  |  Return to Main Contents
 

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).
InterfaceAttributeValue
iswcntrl() Thread safetyMT-Safe locale
 

CONFORMING TO

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 4.04 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 http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
NOTES
SEE ALSO
COLOPHON

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