63 lines
2.1 KiB
Groff
63 lines
2.1 KiB
Groff
.\" Copyright (c) 2002 Tim J. Robbins
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd August 20, 2002
|
|
.Dt WCSWIDTH 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm wcswidth
|
|
.Nd "number of column positions in wide-character string"
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In wchar.h
|
|
.Ft int
|
|
.Fn wcswidth "const wchar_t *pwcs" "size_t n"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn wcswidth
|
|
function determines the number of column positions required for the first
|
|
.Fa n
|
|
characters of
|
|
.Fa pwcs ,
|
|
or until a null wide character (L'\e0') is encountered.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn wcswidth
|
|
function returns 0 if
|
|
.Fa pwcs
|
|
is an empty string (L""),
|
|
\-1 if a non-printing wide character is encountered,
|
|
otherwise it returns the number of column positions occupied.
|
|
.Sh SEE ALSO
|
|
.Xr iswprint 3 ,
|
|
.Xr wcwidth 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn wcswidth
|
|
function conforms to
|
|
.St -p1003.1-2001 .
|