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  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 │
       └───────────┴───────────────┴────────────────┘

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)

COLOPHON

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