NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON 

WCWIDTH(3)                Linux Programmer's Manual               WCWIDTH(3)

NAME         top

       wcwidth - determine columns needed for a wide character

SYNOPSIS         top

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

DESCRIPTION         top

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

RETURN VALUE         top

       The wcwidth() function returns the number of column positions for c.

ATTRIBUTES         top

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

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008.
       Note that glibc before 2.2.5 used the prototype
       int wcwidth(wint_t c);

NOTES         top

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

SEE ALSO         top

       iswprint(3), wcswidth(3)

COLOPHON         top

       This page is part of release 4.12 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/.
GNU                              2015-08-08                       WCWIDTH(3)

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