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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Bug with UTF-8 string and dbus
Date: Wed, 09 Jun 2010 03:27:06 -0400
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To: Julien Danjou <julien@danjou.info>
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In-reply-to: <87r5kgg1ee.fsf@keller.adm.naquadah.org> (message from Julien
	Danjou on Wed, 09 Jun 2010 08:34:17 +0200)
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> From: Julien Danjou <julien@danjou.info>
> Cc: Stefan Monnier <monnier@iro.umontreal.ca>,  emacs-devel@gnu.org
> Date: Wed, 09 Jun 2010 08:34:17 +0200
> 
> > Using unencoded SDATA would be wrong with eight-bit characters (aka
> > raw bytes).  I'd suggest to encode, to be on the safe side.
> 
> Any hint on how to do that ?

Here's one way:

   code_convert_string_norecord (SDATA (object), Qutf_8, 1);

(Make sure you include coding.h, to have Qutf_8 declared.)

You will see quite a few other places we use this in the sources.