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Re: eight-bit char handling in emacs-unicode

From: Kenichi Handa
Subject: Re: eight-bit char handling in emacs-unicode
Date: Fri, 21 Nov 2003 08:41:06 +0900 (JST)
User-agent: SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.2 Emacs/21.3 (sparc-sun-solaris2.6) MULE/5.0 (SAKAKI)

In article <address@hidden>, Juri Linkov <address@hidden> writes:
> (progn
>  (set-language-environment 'ukrainian)
>  (re-search-forward "[\000-\007\013\015-\032\034-\037\200-\237]" nil t))

> It fails with the (invalid-regexp "Invalid range end").
> Could you suggest how to fix this bug?

The current Emacs simply makes the unibyte regex string to
multibyte, and in Uktranian, as nonascii-translation-table
converts ?\200 to 299040, but ?\237 to 2295, the above
regexp leads to "Invalid range end".  This behaviour itself
is a bug.  We must treat \200-\237 as the same way as
\200\201...\236\237 (emacs-unicode already does that).

But fixing that bug doesn't solve the Gnus problem because
the intention of the part "\200-\237" is apparently to match
with C1 control chars, not to match with the multibyte
equivalence in the current language environment.  So
changing the above as below is correct.

  (string-as-multibyte "[\000-\007\013\015-\032\034-\037\200-\237]" nil t))

Ken'ichi HANDA

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