From: Eli Zaretskii <eliz@gnu.org>
To: Kenichi Handa <handa@m17n.org>
Cc: emacs-devel@gnu.org
Subject: Re: Emacs 23 character code space
Date: Sat, 01 Nov 2008 18:46:09 +0200 [thread overview]
Message-ID: <u3aibwg1a.fsf@gnu.org> (raw)
In-Reply-To: <u63n7wmri.fsf@gnu.org>
Another fragment from etc/NEWS that seems not entirely accurate:
In buffers and strings, characters are represented by UTF-8 byte
sequences in a multibyte buffer/string.
But UTF-8 defines 1- to 4-byte sequences to represent each Unicode
codepoint, whereas this comment from character.h:
/* character code 1st byte byte sequence
-------------- -------- -------------
0-7F 00..7F 0xxxxxxx
80-7FF C2..DF 110xxxxx 10xxxxxx
800-FFFF E0..EF 1110xxxx 10xxxxxx 10xxxxxx
10000-1FFFFF F0..F7 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
200000-3FFF7F F8 11111000 1000xxxx 10xxxxxx 10xxxxxx 10xxxxxx
3FFF80-3FFFFF C0..C1 1100000x 10xxxxxx (for eight-bit-char)
400000-... invalid
invalid 1st byte 80..BF 10xxxxxx
F9..FF 11111xxx (xxx != 000)
*/
seems to tell that we use up to 5 bytes.
What am I missing?
next prev parent reply other threads:[~2008-11-01 16:46 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-01 14:20 Emacs 23 character code space Eli Zaretskii
2008-11-01 16:46 ` Eli Zaretskii [this message]
2008-11-03 1:34 ` Kenichi Handa
2008-11-03 12:45 ` Kenichi Handa
2008-11-03 20:13 ` Eli Zaretskii
2008-11-04 7:35 ` Kenichi Handa
2008-11-04 20:19 ` Eli Zaretskii
2008-11-05 12:27 ` Kenichi Handa
2008-11-05 18:23 ` Eli Zaretskii
2008-11-22 18:25 ` Eli Zaretskii
2008-11-26 1:41 ` Kenichi Handa
2008-11-26 4:13 ` Eli Zaretskii
2008-11-26 4:24 ` Kenichi Handa
2008-11-26 4:58 ` Kenichi Handa
2008-11-26 20:26 ` Eli Zaretskii
2008-11-26 22:52 ` Juanma Barranquero
2008-11-27 1:10 ` Stephen J. Turnbull
2008-11-27 1:35 ` Kenichi Handa
2008-11-26 20:18 ` Eli Zaretskii
2008-11-27 1:29 ` Kenichi Handa
2008-11-29 17:12 ` Eli Zaretskii
2008-12-02 5:40 ` Kenichi Handa
2008-11-28 13:19 ` Eli Zaretskii
2008-12-02 5:44 ` Kenichi Handa
2008-12-02 19:40 ` Eli Zaretskii
2008-11-29 12:01 ` Eli Zaretskii
2008-11-22 16:28 ` Eli Zaretskii
2008-11-23 4:16 ` Stefan Monnier
2008-11-23 11:22 ` Eli Zaretskii
2008-11-26 1:51 ` Kenichi Handa
2008-11-23 8:29 ` Ulrich Mueller
2008-11-23 11:11 ` Eli Zaretskii
2008-11-23 11:55 ` Ulrich Mueller
2008-11-24 3:06 ` Stefan Monnier
2008-11-26 1:31 ` Kenichi Handa
2008-11-22 17:03 ` New function: what-file-line, used when writing gdb script richardeng
2008-11-07 7:21 ` Emacs 23 character code space Kenichi Handa
2008-11-07 10:27 ` Eli Zaretskii
2008-11-07 11:52 ` Kenichi Handa
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