Tom, I did a google search, and found the following: http://www.arglist.com/regex/
Which states that Tcl uses the same library from Henry. Maybe someone involved with that project would help explain the library? Also I noticed at the url above is a few ports people did from Henry's code. I didn't download and analyze their code, but maybe they have made some comments that could help, or maybe have some improvements to the code.. Just a thought.. :) Billy Earney On Sun, Feb 19, 2012 at 5:42 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Brendan Jurd <dire...@gmail.com> writes: > > Are you far enough into the backrefs bug that you'd prefer to see it > > through, or would you like me to pick it up? > > Actually, what I've been doing today is a brain dump. This code is > never going to be maintainable by anybody except its original author > without some internals documentation, so I've been trying to write > some based on what I've managed to reverse-engineer so far. It's > not very complete, but I do have some words about the DFA/NFA stuff, > which I will probably revise and fill in some more as I work on the > backref fix, because that's where that bug lives. I have also got > a bunch of text about the colormap management code, which I think > is interesting right now because that is what we are going to have > to fix if we want decent performance for Unicode \w and related > classes (cf the other current -hackers thread about regexes). > I was hoping to prevail on you to pick that part up as your first > project. I will commit what I've got in a few minutes --- look > for src/backend/regex/README in that commit. I encourage you to > add to that file as you figure stuff out. We could stand to upgrade > a lot of the code comments too, of course, but I think a narrative > description is pretty useful before diving into code. > > regards, tom lane > > -- > Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers >
