[haiku] Re: Proposals for the LocaleKit
- From: Ryan Leavengood <leavengood@xxxxxxxxx>
- To: haiku@xxxxxxxxxxxxx
- Date: Sun, 7 Feb 2010 14:50:09 -0500
On Sun, Feb 7, 2010 at 2:35 PM, Travis D. Reed <tdreed@xxxxxxxxx> wrote:
> This is the problem. (Ironically, I used to fight against this with PHP, now
> it does it by itself.) I'm trying to peal off just 8 bits at a time from the
> string, but the way I'm doing it, it counts ellipsis as a char...*sigh*
> Still working on it.
By the way, I was looking at the problem of generating the catkeys
signature and the algorithm is pretty simple. I was trying to code it
up in Ruby but the main problem there is that the Haiku C++ code for
calculating the fingerprint counts on 32-bit integer overflow
arithmetic, whereas Ruby has the Bignum class which automatically
handles big numeric calculations, and this makes it harder to
reproduce what the C++ code does. The main point of all this though is
that you should be able to reproduce this algorithm in PHP, assuming
you can treat the UTF-8 strings just as a stream of bytes and do
32-bit unsigned calculations.
If you want to look the fingerprint code is in this file (in
CatKey::HashFun and BHashMapCatalog::ComputeFingerprint):
http://dev.haiku-os.org/browser/haiku/trunk/src/kits/locale/HashMapCatalog.cpp
--
Regards,
Ryan
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