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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Thu, 9 Sep 2010 08:56:48 +0200
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Cc: Maksim Yevmenkin <maksim.yevmenkin@gmail.com>
Subject: Re: silly libusbhid question
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On Wednesday 08 September 2010 20:57:50 Maksim Yevmenkin wrote:
> hello,
> 
> [trying current@ first to get wider audience :)]
> 
> so, i have a somewhat silly question about libusbhid. please consider
> the following code
> 
> hid_data_t      d;
> hid_item_t      h;
> 
> for (d = hid_start_parse(desc, 1 << hid_input, -1); hid_get_item(d, &h) >
> 0; ) { ...
> }
> hid_end_parse(d);
> 
> the idea is/was to parse and iterate over hid descriptor desc in a
> such a way that only "hid_input" items are returned. as it turns out,
> this code will also pick up "hid_collection" items as well, i.e.
> "h.kind" is set to "hid_collection". is this a bug or a feature?
> 
> thanks,
> max

In kernel and userspace this is currently a feature in the HID libraries.

--HPS