wcwidth(3) — Linux manual page

wcwidth(3)              Library Functions Manual              wcwidth(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_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 │
       └──────────────────────────────┴───────────────┴────────────────┘

STANDARDS         top

       POSIX.1-2008.

HISTORY         top

       POSIX.1-2001.

       Note that before glibc 2.2.5, glibc 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

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Linux man-pages 6.9.1          2024-06-15                     wcwidth(3)

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

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