Re: Adding assembler code to Lua programs
- From: Konstantin Olkhovskiy <lupus@xxxxxxxxxx>
- To: luajit <luajit@xxxxxxxxxxxxx>
- Date: Fri, 7 Mar 2014 14:36:16 +0400
2014-03-07 13:42 GMT+04:00 Mike Pall <mike-1403@xxxxxxxxxx>:
> Dynamically generate Lua source code that scans the data using
> the FFI. Something like this, where d is an FFI struct
> (untested code, typed into the mail):
>
Thanks for your feedback, Mike! I got your general idea, though it seems
that I
want something lower-level, something that chews through raw bytes of an
encoded object, doing as less as possible for chunks of input that are
irrelevant,
e.g. skipping a length-prefixed portion of bytes as soon as it's length is
decoded
without touching them.
The object comes to me as a void * and a size_t denoting it's total length.
So according to your guideline, I need to generate a Lua function which will
iterate through each byte, skipping if necessary and doing some bitop magic,
and for each matched field, decode it (if required) and compare according
to the match_list[field_index].
Does it still sound JIT-friendly?
--
Regards,
Konstantin
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