wcswidth man page on Archlinux

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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	repre‐
       sent  the  wide-character  string  pointed  to by s, but at most n wide
       characters.  If a nonprintable wide character occurs among these	 char‐
       acters, -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
   Multithreading (see pthreads(7))
       The wcswidth() function is thread-safe  with  exceptions.   It  can  be
       safely  used  in multithreaded applications, as long as setlocale(3) is
       not called to change the locale during its execution.

CONFORMING TO
       POSIX.1-2001.

NOTES
       The behavior of wcswidth() depends on the LC_CTYPE category of the cur‐
       rent locale.

SEE ALSO
       iswprint(3), wcwidth(3)

COLOPHON
       This  page  is  part of release 3.65 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU				  2014-01-22			   WCSWIDTH(3)
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