Add wcwidth(3) man page. ok nicm

2 files changed, 63 insertions, 2 deletions

diff --git a/lib/libc/locale/Makefile.inc b/lib/libc/locale/Makefile.inc
index 987996b7269..752395bdad3 100644
--- a/lib/libc/locale/Makefile.inc
+++ b/lib/libc/locale/Makefile.inc
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile.inc,v 1.16 2010/07/27 16:59:03 stsp Exp $
+#	$OpenBSD: Makefile.inc,v 1.17 2011/04/03 20:21:38 stsp Exp $
 
 # locale sources
 .PATH: ${LIBCSRCDIR}/arch/${MACHINE_CPU}/locale ${LIBCSRCDIR}/locale
@@ -15,7 +15,7 @@ MAN+=	nl_langinfo.3 setlocale.3 iswalnum.3 towlower.3 \
 	btowc.3 mblen.3 mbrlen.3 mbrtowc.3 mbsinit.3 mbsrtowcs.3 \
 	mbstowcs.3 mbtowc.3 wcrtomb.3 wcsrtombs.3 wcstod.3 wcstol.3 \
 	wcstombs.3 wctob.3 wctomb.3 \
-	wctype.3 iswctype.3 wctrans.3 towctrans.3
+	wctype.3 iswctype.3 wctrans.3 towctrans.3 wcwidth.3
 MLINKS+=setlocale.3 localeconv.3 \
 	iswalnum.3 iswalpha.3 \
 	iswalnum.3 iswblank.3 \
diff --git a/lib/libc/locale/wcwidth.3 b/lib/libc/locale/wcwidth.3
new file mode 100644
index 00000000000..83c4e15f61f
--- /dev/null
+++ b/lib/libc/locale/wcwidth.3
@@ -0,0 +1,61 @@
+.\" $OpenBSD: wcwidth.3,v 1.1 2011/04/03 20:21:38 stsp Exp $
+.\" 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.
+.\"
+.\"
+.Dd $Mdocdate: April 3 2011 $
+.Dt WCWIDTH 3
+.Os
+.Sh NAME
+.Nm wcwidth
+.Nd number of column positions of a wide-character code
+.Sh SYNOPSIS
+.In wchar.h
+.Ft int
+.Fn wcwidth "wchar_t wc"
+.Sh DESCRIPTION
+The
+.Fn wcwidth
+function determines the number of column positions required to
+display the wide character
+.Fa wc .
+.Sh RETURN VALUES
+The
+.Fn wcwidth
+function returns 0 if the
+.Fa wc
+argument is a null wide character (L'\e0'),
+\-1 if
+.Fa wc
+is not printable,
+otherwise it returns the number of column positions the
+character occupies.
+.Sh SEE ALSO
+.Xr iswprint 3 ,
+.Xr wcswidth 3
+.Sh STANDARDS
+The
+.Fn wcwidth
+function conforms to
+.St -p1003.1-2001 .