wcwidth(3)                 Library Functions Manual                 wcwidth(3)

NAME
       wcwidth - determine columns needed for a wide character

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #define _XOPEN_SOURCE       /* See feature_test_macros(7) */
       #include <wchar.h>

       int wcwidth(wchar_t c);

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

ATTRIBUTES
       For an explanation of the terms used in this section, see
       attributes(7).

       +-------------------------------------+---------------+----------------+
       |Interface                            | Attribute     | Value          |
       +-------------------------------------+---------------+----------------+
       |wcwidth ()                           | Thread safety | MT-Safe locale |
       +-------------------------------------+---------------+----------------+
STANDARDS
       POSIX.1-2008.

HISTORY
       POSIX.1-2001.

       Note that before glibc 2.2.5, glibc used the prototype

       int wcwidth(wint_t c);

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

SEE ALSO
       iswprint(3), wcswidth(3)

Linux man-pages 6.7               2023-10-31                        wcwidth(3)