[fprint] libfprint suggestions

[Pavel Herrmann]

Well, empty in any way, something that could be used as "print not 
enrolled" in scenario with the same number of fingers for each account 
(something like 10 for human beings) so that the back-mapping is not 
required. Theoretically something that will always being identified 
against, maybe some number of zeros. (NULL pointer is not usable as it 
is used as the last element in the array, if I remember well)

I mean if I load a number of fingerprints from the file and run identify 
against them, i can simply divide the returned index by 10 and I know 
which user does that belong to, instead of having to remember that the 
first user only has six fingers and has second has eight or something.

Hope you understand what I am thinking about.

Or is there some other problem with full identification (no name/pass, 
just the finger) that i did not find?

Pavel

PS. for the dependency suggestion in the other thread, why do we have 
(extended) USE in gentoo? there are LIRC_DEVICES and VIDEO_CARDS and 
many others, why no FPRINT_DEVICES? I will try to have a look at this 
one in the next week.

Daniel Drake wrote:
> Pavel Herrmann wrote:
>> One more question, how does libfprint behave when the provided print 
>> is empty?
>
> Depends what you mean by empty. How would you construct/pass an 
> "empty" print? A NULL pointer?
>
> Daniel