mirror of https://github.com/mkerrisk/man-pages
76 lines
1.7 KiB
Groff
76 lines
1.7 KiB
Groff
.\" 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 2021-03-22 "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).
|
|
.ad l
|
|
.nh
|
|
.TS
|
|
allbox;
|
|
lbx lb lb
|
|
l l l.
|
|
Interface Attribute Value
|
|
T{
|
|
.BR wcswidth ()
|
|
T} Thread safety MT-Safe locale
|
|
.TE
|
|
.hy
|
|
.ad
|
|
.sp 1
|
|
.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)
|