[TRE-general] Match Description

[Ville Laurikari]

On Mon, Jun 11, 2007 at 03:35:08PM -0300, Arliones Hoeller Jr wrote:
>
> Hi everyone,
>
> I'm using TRE to search texts for multiple regex at the same time. My
> problem is that I would like to know which one of my regexs generated each
> match. Is it possible to have this information from the TRE?

It sure is.  I presume your regex has this general form:
  re1|re2|re3|re4|...

If you change it to
  (re1)|(re2)|(re3)|(re4)|...

then you can use the submatch data reported in the pmatch[] array to
see which part matched.  The rm_so and rm_eo fields are all -1 for all
but the part which matches.

If you need more details, try http://laurikari.net/tre/api.html.

If you're looking for very high performance, for something like this
I'd suggest you use a lexer tool instead (such as flex:
http://flex.sourceforge.net).

--
http://www.iki.fi/vl/