Re: [yazicivo@ttnet.net.tr: Locale Dependent Downcasing in smtpmail]

[Kenichi Handa <handa@m17n.org>]

In article <87ejn2jsnu.fsf@stupidchicken.com>, Chong Yidong <cyd@stupidchicken.com> writes:

> Kenichi Handa <handa@m17n.org> writes:
>>> smtpmail tries to downcase the strings using DOWNCASE function
>>> during the SMTP communication.  In Turkish, downcased I is a
>>> dotless i.  Therefore, while it tries to downcase some AUTH
>>> mechanisms (in smtpmail-via-smtp function), PLAIN and LOGIN turns
>>> into pla?n and log?n.
> >
> > Does the attached change fix the problem?
> >
> > ! 		(let ((name (mapcar (lambda (s)
> > ! 				      (setq s (downcase s))
> > ! 				      ;; If `I' is downcased to dotless-i,
> > ! 				      ;; convert it to `i'.
> > ! 				      (if (/= (downcase ?I) ?i)
> > ! 					  (subst-char-in-string
> > ! 					   (downcase ?I) ?i s t))
> > ! 				      (intern s))

> I wonder if there's a better way to do this.  Maybe we can define an
> ascii case table that doesn't get overwritten by the locale; then code
> like the above can bind to this case table temporarily (or we can
> define a downcase-ascii function that does such a thing).

> But maybe, for Emacs 22, the above hack is all we need.  Is it true
> that in practice, all we have to worry about is "i"?

In practice I think only dotless-i is the problematic
character.  But, I don't know what is the right thing for
the code around there for non-ascii characters.  For
instance, dotted-I (U+0130) is downcased to `i'.  Is it ok?

---
Kenichi Handa
handa@m17n.org