I'm afrad I don't know what you mean by 'text parser.' my suggestion would be to learn ruby or perl.
Manning publications has a good book on doing this sort of thing: Data Munging with perl.
Good luck!
I have large files that I need to validate but I need a text parser. Anyone have a suggestion?
That's a pretty nebulous requirement. What exactly are you trying to parse?
A csv file?
A log file?
A query dump?
knowing a bit more about the output might help someone point you to a fair tool.