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wcwidth(3) — Linux manual page

wcwidth(3)               Library Functions Manualwcwidth(3)

NAME        top

       wcwidth - determine columns needed for a wide character

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#define _XOPEN_SOURCE/* See feature_test_macros(7) */#include <wchar.h>int wcwidth(wchar_twc);

DESCRIPTION        top

       Thewcwidth() function returns the number of columns needed to       represent the wide characterwc.  Ifwc is a printable wide       character, the value is at least 0.  Ifwc is null wide character       (L'\0'), the value is 0.  Otherwise, -1 is returned.

RETURN VALUE        top

       Thewcwidth() function returns the number of column positions forwc.

ATTRIBUTES        top

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

STANDARDS        top

       POSIX.1-2008.

HISTORY        top

       POSIX.1-2001.       Note that before glibc 2.2.5, glibc used the prototypeint wcwidth(wint_twc);

NOTES        top

       The behavior ofwcwidth() depends on theLC_CTYPEcategory of the       current locale.

SEE ALSO        top

iswprint(3),wcswidth(3)

COLOPHON        top

       This page is part of theman-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-6.10.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-02-02.  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 isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.10            2024-11-17wcwidth(3)

Pages that refer to this page:curs_getcchar(3x), wcswidth(3), unicode(7)

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