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From: Pali =?utf-8?B?Um9ow6Fy?= <pali.rohar@gmail.com>
Subject: Re: WMI and Kernel:User interface
Date: Tue, 20 Jun 2017 09:29:06 +0200
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To: Darren Hart <dvhart@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Christoph Hellwig <hch@infradead.org>, Linus Torvalds <torvalds@linux-foundation.org>, Mario Limonciello <mario_limonciello@dell.com>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Rafael Wysocki <rjw@rjwysocki.net>, LKML <linux-kernel@vger.kernel.org>, platform-driver-x86@vger.kernel.org

On Monday 19 June 2017 20:37:25 Darren Hart wrote:
> dell-wmi:
> Type and code, where type may be, for example, "sequence" and then each byte of
> buffen length is processed as a key.

It is more complicated. Buffer can contain more sequences (each has own
length) and each sequence can contain different hotkey + additional info.

So I doubt it would be possible to describe in context-free grammar
specification of even buffer... And something more complicated (as L0 or
L1) is not a good idea to parse in kernel.

-- 
Pali Rohár
pali.rohar@gmail.com