0ce1971c2a
PR: 4555 Submitted by: Dmitrij Tejblum <tejblum@arc.hq.cti.ru> [0x0400 - 0xffff] [bbbbbbbb.bbbbbbbb] -> 1110bbbb, 10bbbbbb, 10bbbbbb .Ed .Pp If more than a single representation of a value exists (for example, 0x00; 0xC0 0x80; 0xE0 0x80 0x80) the shortest representation is always used (but the longer ones will be correctly decoded). .Pp The final three encodings provided by X-Open: .Bd -literal [00000000.000bbbbb.bbbbbbbb.bbbbbbbb] -> 11110bbb, 10bbbbbb, 10bbbbbb, 10bbbbbb [000000bb.bbbbbbbb.bbbbbbbb.bbbbbbbb] -> 111110bb, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb [0bbbbbbb.bbbbbbbb.bbbbbbbb.bbbbbbbb] -> 1111110b, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb .Ed .Pp which provides for the entire proposed ISO-10646 31 bit standard are currently not implemented. .Sh "SEE ALSO" .Xr mklocale 1 , .Xr setlocale 3 @ 1.4 log @Don't use hardcoded *roff font change requests. Do it via mdoc macros instead. @ text @d37 1 a37 1 .Dd "June 4, 1993" @ 1.3 log @Very minor mdoc cleanup. @ text @d44 2 a45 1 \fBENCODING "UTF2"\fP @ 1.2 log @Another round of various man page cleanups. @ text @d65 1 a65 1 .sp d81 1 a81 1 .sp @ 1.2.2.1 log @YAMFC: Commit all of the -current changes that apply to 2.2. These fall into several categories: - Cosmetic/mdoc changes. They don't really afect the output at all, but having them in 2.2 will make it easier to diff the man pages later when looking for real changes. - Update some man pages to reflect the current 2.2 header files. - Sort xrefs. - A few typo fixes. - And a few changes that actualy added text to the man page that should be reflected in 2.2. - Add some missing MLINKS. Requested by: bde @ text @d44 1 a44 2 .Nm ENCODING .Qq UTF2 d65 1 a65 1 .Pp d81 1 a81 1 .Pp @ 1.2.2.2 log @MFC: Just the locale fixes (small doc tweaks for the most part) and the new strptime(3) call. Having added something, does this require a version bump? Haven't we bumped once already? There are a *LOT* of additional 3.0 changes to be merged but I'm not entirely comfortable with some of them so I'll take the conservative (read: cowardly :) way out and just merge this much. @ text @d37 1 a37 1 .Dd June 4, 1993 @ 1.1 log @Initial revision @ text @d41 1 a41 1 .Nm UTF2 @ 1.1.1.1 log @BSD 4.4 Lite Lib Sources @ text @@ 1.1.1.1.6.1 log @Phase 2 of merge - also fix things broken in phase 1. Watch out for falling rock until phase 3 is over! libc completely merged except for phkmalloc & rfork (don't know if David wants that). Some include files in sys/ had to be updated in order to bring in libc. @ text @d41 1 a41 1 .Nm utf2 @ 1.1.1.1.6.2 log @This 3rd mega-commit should hopefully bring us back to where we were. I can get it to `make world' succesfully, anyway! @ text @d41 1 a41 1 .Nm UTF2 @
88 lines
3.6 KiB
Groff
88 lines
3.6 KiB
Groff
.\" Copyright (c) 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Paul Borman at Krystal Technologies.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)utf2.4 8.1 (Berkeley) 6/4/93
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.\"
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.Dd June 4, 1993
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.Dt UTF2 4
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.Os
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.Sh NAME
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.Nm utf2
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.Nd "Universal character set Transformation Format encoding of runes
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.Sh SYNOPSIS
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.Nm ENCODING
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.Qq UTF2
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.Sh DESCRIPTION
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The
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.Nm UTF2
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encoding is based on a proposed X-Open multibyte
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\s-1FSS-UCS-TF\s+1 (File System Safe Universal Character Set Transformation Format) encoding as used in
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.Nm Plan 9 from Bell Labs.
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Although it is capable of representing more than 16 bits,
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the current implementation is limited to 16 bits as defined by the
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Unicode Standard.
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.Pp
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.Nm UTF2
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representation is backwards compatible with ASCII, so 0x00-0x7f refer to the
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ASCII character set. The multibyte encoding of runes between 0x0080 and 0xffff
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consist entirely of bytes whose high order bit is set. The actual
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encoding is represented by the following table:
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.Bd -literal
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[0x0000 - 0x007f] [00000000.0bbbbbbb] -> 0bbbbbbb
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[0x0080 - 0x07ff] [00000bbb.bbbbbbbb] -> 110bbbbb, 10bbbbbb
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[0x0800 - 0xffff] [bbbbbbbb.bbbbbbbb] -> 1110bbbb, 10bbbbbb, 10bbbbbb
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.Ed
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.Pp
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If more than a single representation of a value exists (for example,
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0x00; 0xC0 0x80; 0xE0 0x80 0x80) the shortest representation is always
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used (but the longer ones will be correctly decoded).
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.Pp
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The final three encodings provided by X-Open:
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.Bd -literal
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[00000000.000bbbbb.bbbbbbbb.bbbbbbbb] ->
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11110bbb, 10bbbbbb, 10bbbbbb, 10bbbbbb
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[000000bb.bbbbbbbb.bbbbbbbb.bbbbbbbb] ->
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111110bb, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb
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[0bbbbbbb.bbbbbbbb.bbbbbbbb.bbbbbbbb] ->
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1111110b, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb
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.Ed
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.Pp
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which provides for the entire proposed ISO-10646 31 bit standard are currently
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not implemented.
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.Sh "SEE ALSO"
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.Xr mklocale 1 ,
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.Xr setlocale 3
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