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)