From: Kenichi Handa <handa@m17n.org>
Cc: emacs-devel@gnu.org
Subject: Re: adding a new encoding
Date: Tue, 22 Jun 2004 08:44:41 +0900 (JST) [thread overview]
Message-ID: <200406212344.IAA11732@etlken.m17n.org> (raw)
In-Reply-To: <20040621200633.GF1361@ata.cs.hun.edu.tr> (message from Baurjan Ismagulov on Mon, 21 Jun 2004 22:06:33 +0200)
In article <20040621200633.GF1361@ata.cs.hun.edu.tr>, Baurjan Ismagulov <ibr@ata.cs.hun.edu.tr> writes:
> > > * Emacs uses ISO 2022 internally.
> > Not correct. Emacs uses character codes of each ISO-2022
> > conforming charsets.
> And each character is prepended with a charset code?
Yes, prepended with a charset code of range 0x80..0x9D plus
optional extented charset code of range 0xA0..0xFF, and code
points (0x20..0x7F) are `logior'ed with 0x80. So a
multibyte representation of character is classified into
these:
0x00..0x7F
0x80..0x9D 0xA0..0xFF
0x80..0x9D 0xA0..0xFF 0xA0..0xFF
0x80..0x9D 0xA0..0xFF 0xA0..0xFF 0xA0..0xFF
> How do raw bytes
> look like in Emacs memory for, say, \U+0410\U+00DF\U+0534? Is there an
> easy way to see that (princ somewhere in
> lisp/international/mule-cmds.el)?
Try this:
(string-as-unibyte (string (decode-char 'ucs #x0410)
(decode-char 'ucs #x00DF)
(decode-char 'ucs #x0534)))
M-x list-character-sets also give some information.
But, you'ld better not write a code depending on it.
Unicode-based Emacs (that will come after the release of
current CVS HEAD) uses UTF-8 as a multibyte representation.
---
Ken'ichi HANDA
handa@m17n.org
prev parent reply other threads:[~2004-06-21 23:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-19 15:03 adding a new encoding Baurjan Ismagulov
2004-06-20 16:35 ` Baurjan Ismagulov
2004-06-20 23:18 ` Kenichi Handa
2004-06-21 20:06 ` Baurjan Ismagulov
2004-06-21 23:44 ` Kenichi Handa [this message]
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