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wcswidth(3)

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
       For an explanation of the terms  used  in  this  section,  see  attrib‐
       utes(7).   allbox;  lb  lb  lb l l l.  Interface Attribute Value T{ wc‐
       swidth() T}   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 cur‐
       rent locale.

SEE ALSO
       iswprint(3), wcwidth(3)

COLOPHON
       This page is part of release 5.02 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.

GNU                               2015-08-08                       WCSWIDTH(3)
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