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

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

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 non‐
       printable 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 │
       └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘

CONFORMING TO
       POSIX.1-2001, POSIX.1-2008.

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

SEE ALSO
       iswprint(3), wcwidth(3)

GNU                                                                            2021-03-22                                                                    WCSWIDTH(3)