Re: [nft PATCH 3/4] segtree: Merge get_set_interval_find() and get_set_interval_end()

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On Thu, Apr 30, 2020 at 05:37:29PM +0200, Pablo Neira Ayuso wrote:
> On Thu, Apr 30, 2020 at 05:14:07PM +0200, Phil Sutter wrote:
> > Both functions were very similar already. Under the assumption that they
> > will always either see a range (or start of) that matches exactly or not
> > at all, reduce complexity and make get_set_interval_find() accept NULL
> > (left or) right values. This way it becomes a full replacement for
> > get_set_interval_end().
> 
> I have to go back to the commit log of this patch, IIRC my intention
> here was to allow users to ask for a single element, then return the
> range that contains it.

That was my suspicion as well, but while testing I found out that no
matter what I passed to 'get element', I couldn't provoke a situation in
which get_set_interval_find() would have left and right elements which
didn't match exactly (or not at all).

There must be some preparation happening before the call to
get_set_decompose() which normalizes things. And still, If I disable the
call to get_set_decompose() entirely, tests start failing.

Cheers, Phil



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