Question about font-lock

Hi all,

I am reading font-lock related code, doc, web, this days. And come out some
questions about History of font-lock in XEmacs and Gnu Emacs. Would you
please help give some light on it if possible?

1. From the doc, font-lock was implement by jwz. Do you know if font-lock
algorithm of GNU Emacs still the original jwz's one or had been totally
rewrote/refactor already?

2. I see from some web, doc that GNU Emacs jit-lock depends on C level
support, are there any detailed document about this dependency except the
source code? Do you see how difficult to import the jit-lock and its
dependency C support to XEmacs?

3. I find lazy-shot was also said to depends on C level support. I'd not
read its source yet. Are you able to describe the difference of jit-lock
and lazy-shot in high level?



Oh, lost some questions by disturb. will send out when I recall them.

Thanks,
Kai