wcswidth(3)                Library Functions Manual                wcswidth(3)

NAME
       wcswidth - determine columns needed for a fixed-size wide-character
       string

LIBRARY
       Standard C library (libc, -lc)

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

       int wcswidth(const wchar_t *s, size_t n);

DESCRIPTION
       The wcswidth() function returns the number of columns needed to
       represent the wide-character string pointed to by s, but at most n wide
       characters.  If a nonprintable wide character occurs among these
       characters, -1 is returned.

RETURN VALUE
       The wcswidth() function returns the number of column positions for the
       wide-character string s, truncated to at most length n.

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

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

HISTORY
       POSIX.1-2001.

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

SEE ALSO
       iswprint(3), wcwidth(3)

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