iswspace(3) — Linux manual page

iswspace(3)              Library Functions Manual             iswspace(3)

NAME         top

       iswspace - test for whitespace wide character

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <wctype.h>

       int iswspace(wint_t wc);

DESCRIPTION         top

       The iswspace() function is the wide-character equivalent of the
       isspace(3) function.  It tests whether wc is a wide character
       belonging to the wide-character class "space".

       The wide-character class "space" 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 "space" contains the wide-character class
       "blank".

       The wide-character class "space" always contains at least the
       space character and the control characters '\f', '\n', '\r', '\t',
       and '\v'.

RETURN VALUE         top

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

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌───────────────────────────────┬───────────────┬────────────────┐
       │ Interface                     │ Attribute     │ Value          │
       ├───────────────────────────────┼───────────────┼────────────────┤
       │ iswspace()                    │ Thread safety │ MT-Safe locale │
       └───────────────────────────────┴───────────────┴────────────────┘

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       POSIX.1-2001, C99.

NOTES         top

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

SEE ALSO         top

       isspace(3), iswctype(3)

COLOPHON         top

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.15.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2025-08-11.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.15            2025-05-17                    iswspace(3)

Pages that refer to this page: isalpha(3),  iswctype(3)

HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.