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.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
.\"
.\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA)
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
.\" %%%LICENSE_END
.\"
.\" References consulted:
.\" GNU glibc-2 source code and manual
.\" Dinkumware C library reference http://www.dinkumware.com/
.\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
.\"
.TH WCSWIDTH 3 2015-08-08 "GNU" "Linux Programmer's Manual"
.SH NAME
wcswidth \- determine columns needed for a fixed-size wide-character string
.SH SYNOPSIS
.nf
.BR "#define _XOPEN_SOURCE" " /* See feature_test_macros(7) */"
.B #include <wchar.h>
.PP
.BI "int wcswidth(const wchar_t *" s ", size_t " n );
.fi
.SH DESCRIPTION
The
.BR wcswidth ()
function returns the
number of columns needed to represent
the wide-character string pointed to by
.IR s ,
but at most
.I n
wide
characters.
If a nonprintable wide character occurs among these characters,
\-1 is returned.
.SH RETURN VALUE
The
.BR wcswidth ()
function
returns the number of column positions for the
wide-character string
.IR s ,
truncated to at most length
.IR n .
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface Attribute Value
T{
.BR wcswidth ()
T} Thread safety MT-Safe locale
.TE
.SH CONFORMING TO
POSIX.1-2001, POSIX.1-2008.
.SH NOTES
The behavior of
.BR wcswidth ()
depends on the
.B LC_CTYPE
category of the
current locale.
.SH SEE ALSO
.BR iswprint (3),
.BR wcwidth (3)
.SH COLOPHON
This page is part of release 5.10 of the Linux
.I 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/.
|
