Section (3) iswblank


Linux manual pages Section 3  

Name

iswblank — test for whitespace wide character

Synopsis

#include <wctype.h>
int iswblank( wint_t wc);
 
[Note] Note
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
iswblank():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

DESCRIPTION

The iswblank() function is the wide-character equivalent of the isblank(3) function. It tests whether wc is a wide character belonging to the wide-character class blank.

The wide-character class blank is a subclass of the wide-character class space.

Being a subclass of the wide-character class space, the wide-character class blank is disjoint from the wide-character class graph and therefore also disjoint from its subclasses alnum, alpha, upper, lower, digit, xdigit, punct.

The wide-character class blank always contains at least the space character and the control character _zsingle_quotesz_ _zsingle_quotesz_.

RETURN VALUE

The iswblank() function returns nonzero if wc is a wide character belonging to the wide-character class blank. Otherwise, it returns zero.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
iswblank() Thread safety MT-Safe locale

CONFORMING TO

POSIX.1-2001, POSIX.1-2008.

NOTES

The behavior of iswblank() depends on the LC_CTYPE category of the current locale.

SEE ALSO

isblank(3), iswctype(3)

COLOPHON

This page is part of release 5.04 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 https://www.kernel.org/doc/man−pages/.


  Copyright (c) Bruno Haible <haibleclisp.cons.org>

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References consulted:
  GNU glibc-2 source code and manual
  Dinkumware C library reference http://www.dinkumware.com/
  OpenGroup_zsingle_quotesz_s Single UNIX specification http://www.UNIX-systems.org/online.html
  ISO/IEC 9899:1999