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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GNU                                                2015-08-08                                        WCSWIDTH(3)