Sevenbit-strings only partially respected?

[Eli Zaretskii]

> From: Vladimir Prus <vladimir@codesourcery.com>
> Date: Sat, 09 Oct 2010 23:48:12 +0400
> 
> >   if (c < 0x20 ||		/* Low control chars */
> >       (c >= 0x7F && c < 0xA0) ||	/* DEL, High controls */
> >       (sevenbit_strings && c >= 0x80))
> >     {/* high order bit set */
> > 
> > Apparently, the second condition fires and causes 0xD0 to be quoted. Is
> > this expected behaviour?
> 
> Doh. Of course 0xD0 is larger than 0xA0. The value that causes the actual
> problem is 0x83. Russian letter 'у' is encoded in UTF8 as 0xD1 0x83, and
> because of the above code, strings with that letter (and some other letters)
> get messed up completely.

That `(c >= 0x7F && c < 0xA0)' condition assumes ISO-8859-n encodings
(probably was coded for 8859-1), and should not be used with anything
else.