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ISWBLANK(3) | Linux Programmer's Manual | ISWBLANK(3) |
NAME¶
iswblank - test for whitespace wide characterSYNOPSIS¶
#include <wctype.h>int iswblank(wint_t wc);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_XOPEN_SOURCE >= 600 ||
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99
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 '\t'.RETURN VALUE¶
The iswblank() function returns nonzero if wc is a wide character belonging to the wide-character class "blank". Otherwise it returns zero.CONFORMING TO¶
POSIX.1-2001.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 3.44 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/.2010-09-20 | GNU |