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ISWBLANK(3) - man page online | library functions

Test for whitespace wide character.

Chapter
2015-08-08
ISWBLANK(3)                         Linux Programmer's Manual                         ISWBLANK(3)

NAME iswblank - test for whitespace wide character
SYNOPSIS #include <wctype.h> int iswblank(wint_t wc); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): iswblank(): _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 sub‐ classes "alnum", "alpha", "upper", "lower", "digit", "xdigit", "punct". The wide-character class "blank" always contains at least the space character and the con‐ trol 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.
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 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/.
GNU 2015-08-08 ISWBLANK(3)
This manual Reference Other manuals
iswblank(3) referred by isalpha(3) | iswctype(3)
refer to attributes(7) | feature_test_macros(7) | isalpha(3) | iswctype(3)