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+'\" t
+.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
+.\"
+.\" SPDX-License-Identifier: GPL-2.0-or-later
+.\"
+.\" 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 wcwidth 3 2023-10-31 "Linux man-pages 6.06"
+.SH NAME
+wcwidth \- determine columns needed for a wide character
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.BR "#define _XOPEN_SOURCE" "       /* See feature_test_macros(7) */"
+.B #include <wchar.h>
+.P
+.BI "int wcwidth(wchar_t " c );
+.fi
+.SH DESCRIPTION
+The
+.BR wcwidth ()
+function returns the number of columns
+needed to represent the wide character
+.IR c .
+If
+.I c
+is a printable wide character, the value
+is at least 0.
+If
+.I c
+is null wide character (L\[aq]\e0\[aq]), the value is 0.
+Otherwise, \-1 is returned.
+.SH RETURN VALUE
+The
+.BR wcwidth ()
+function returns the number of
+column positions for
+.IR c .
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.na
+.nh
+.BR wcwidth ()
+T}	Thread safety	MT-Safe locale
+.TE
+.SH STANDARDS
+POSIX.1-2008.
+.SH HISTORY
+POSIX.1-2001.
+.P
+Note that before glibc 2.2.5, glibc used the prototype
+.P
+.nf
+.BI "int wcwidth(wint_t " c );
+.fi
+.SH NOTES
+The behavior of
+.BR wcwidth ()
+depends on the
+.B LC_CTYPE
+category of the
+current locale.
+.SH SEE ALSO
+.BR iswprint (3),
+.BR wcswidth (3)