Re: Problems with 8-bit headers

[Kenichi Handa <handa@etl.go.jp>]

=?ISO-8859-1?Q?Fran=E7ois_Pinard?= <pinard@iro.umontreal.ca> writes:
> Vladimir Volovich <vvv@vvv.vsu.ru> writes:
>>  However, there is a bug somewhere in core Emacs which makes it misbehave
>>  when i receive messages with 8-bit content-transfer-encoding and characters
>>  in the range 0x80--0x9f (which often happens when i receive messages
>>  in UTF-8).

> I fear that this is a strong limitation of Mule for Latin characters.
> A kind that may be very hard to repair.

Emacs still doesn't support UTF-8 encoding.  But, I've just
finished the work for handling 0x80..0x9f bytes in a better
way in the developping code of Emacs 21.  With that, those
characters can appear even in a multibyte buffer without
being combined with the following 0xa0..0xff bytes.  And,
thus, code conversion is now reversible.

And, although the external package Mule-UCS supports UTF-8
encoding, as you already know, it can handle only such
characters that Emacs supports.  But, we have agreed on
adding a new (Emacs internal) charset
`mule-unicode-0100-24ff' which contains Unicode characters
of the range U+0100..U+24FF (thus convers all Cyrillic
characters).  On reading UTF-8, Mule-UCS at first tries to
map Cyrillic characters of cyrillic-8859-5, but if
impossible, map to mule-unicode-0100-24ff.

>>  I store mails in nnmbox backend, and when i receive such a message,
>>  i get ENORMOUS time delays when pressing `g' in a group buffer, and
>>  article numbering gets broken (displayed number of articles in a group
>>  is overestimated), and such things. I think this is because Emacs uses
>>  "intelligent" auto-detection algorithm which wants to interpret a `mbox'
>>  buffer as if it were in some charset (mbox is opened in raw mode, but
>>  this does not help to switch of this "intelligent" behavior, and certain
>>  character combinations choke Emacs). This is a long-standing bug which
>>  is there for more than a year, but i don't know how to report it... :-(

Which mail program are you using?  Gnus?

---
Ken'ichi HANDA
handa@etl.go.jp