linux-kernel - Re: [PATCH] unicode diacritics support

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Message-Id: <20070809124642.fbbd3e68.akpm@linux-foundation.org>
Date:	Thu, 9 Aug 2007 12:46:42 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Samuel Thibault <samuel.thibault@...-lyon.org>
Cc:	linux-kernel@...r.kernel.org,
	linuxconsole-dev@...ts.sourceforge.net, akpm@...gle.com
Subject: Re: [PATCH] unicode diacritics support

On Wed, 8 Aug 2007 10:10:10 +0200
Samuel Thibault <samuel.thibault@...-lyon.org> wrote:

> There have been issues with non-latin1 diacritics and unicode.
> http://bugzilla.kernel.org/show_bug.cgi?id=7746
> 
> Git 759448f459234bfcf34b82471f0dba77a9aca498 `Kernel utf-8 handling'
> partly resolved it by adding conversion between diacritics and
> unicode. The patch below goes further by just turning diacritics into
> unicode, hence providing better future support. The kbd support can be
> fetched from
> http://bugzilla.kernel.org/attachment.cgi?id=12313
> 
> This was tested in all of latin1, latin9, latin2 and unicode with french
> and czech dead keys.
> 
> --
> 
> Turn the kernel accent_table into unicode, and extend ioctls KDGKBDIACR
> and KDSKBDIACR into their equivalents KDGKBDIACRUC and KDSKBDIACR.
> 
> New function int conv_uni_to_8bit(u32 uni) for converting unicode into 8bit
> _input_.  No, we don't want to store the translation, as it is potentially
> sparse and large.

This changes the kernel ABI a bit.  The KDGKBDIACR ioctl (and friends)
now return different data.  What are the implications of this?
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