regex status report #12

[Gabor Kovesdan]

Hi,

during the week I cleaned up the fast matching algorithm and added some 
comments. I also noticed that support for some flags were missing. I 
also started working on the heuristic matching but I only wrote some 
lines for the parser that creates the heuristic and it's not complete 
yet so I haven't checked it in.

In the meantime, some bugs were discovered in BSD grep, one of them is 
related to the shortcuts, the previous version of the code I have been 
working on. So I decided that I'll backport this version that I made for 
TRE. In this way, BSD grep will have early access to this code and 
provide a better performance. Another advantage is that BSD grep users 
can test this piece of code.

Gabor