add a tiny, to be improved, man page for utf8 encoding.

ok stsp

2 files changed, 62 insertions, 2 deletions

diff --git a/share/man/man7/Makefile b/share/man/man7/Makefile
index f295d97fa4d..ef07e278691 100644
--- a/share/man/man7/Makefile
+++ b/share/man/man7/Makefile
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.26 2017/05/29 12:13:50 tedu Exp $
+#	$OpenBSD: Makefile,v 1.27 2017/05/31 08:30:22 tedu Exp $
 #	$NetBSD: Makefile,v 1.6 1994/12/22 10:50:05 cgd Exp $
 
 # missing: term.7
@@ -7,6 +7,6 @@ MAN=	airport.7 ascii.7 eqn.7 environ.7 glob.7 hier.7 hostname.7 intro.7 \
 	library-specs.7 \
 	man.7 mandoc_char.7 mdoc.7 mirroring-ports.7 \
 	operator.7 packages.7 packages-specs.7 pkgpath.7 ports.7 roff.7 \
-	script.7 securelevel.7 tbl.7
+	script.7 securelevel.7 tbl.7 utf8.7
 
 .include <bsd.prog.mk>
diff --git a/share/man/man7/utf8.7 b/share/man/man7/utf8.7
new file mode 100644
index 00000000000..b0dacfb61c7
--- /dev/null
+++ b/share/man/man7/utf8.7
@@ -0,0 +1,60 @@
+.\"	$OpenBSD: utf8.7,v 1.1 2017/05/31 08:30:22 tedu Exp $
+.\"
+.\" Copyright (c) 2017 Ted Unangst
+.\" 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 DEVELOPERS ``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 DEVELOPERS 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: May 31 2017 $
+.Dt UTF8 7
+.Os
+.Sh NAME
+.Nm utf8
+.Nd UTF-8 text encoding
+.Sh DESCRIPTION
+UTF-8 is a multibyte encoding for Unicode text.
+It is the preferred format for non ASCII text.
+.Pp
+The first byte of a sequence indicates the length in its high bits.
+Continuation bytes all have the same format, with the top two bits set and
+unset, respectively.
+.Pp
+Ranges:
+.Bl -tag -width Ds
+.It 0x0 - 0x7f
+One byte.
+0.......
+.It 0x80 - 0x7ff
+Two bytes.
+110..... 10.......
+.It 0x800 - 0xffff
+Three bytes.
+1110.... 10...... 10......
+.It 0x1000 - 0x10ffff
+Four bytes.
+11110... 10...... 10...... 10......
+.El
+.Sh CAVEATS
+Beware of overlong encodings.
+.Sh STANDARDS
+Unicode.
+.Sh SEE ALSO
+.Xr ascii 7