TextBuffer and regex?

[Rob Nikander <nikander nc rr com>]

Hi all,
Is anyone using regular expressions with a GtkTextBuffer?  Is there a
'recommended' way to do this yet?  If not, does anyone know a regex
library out there that allows an abstract character source as the "string
to search" parameter, rather than a char * or unichar *?  That would make
it pretty easy to fit use with a GtkTextBuffer.  Slower is better than
nothing and probably works fine in most cases... 

take care,
Rob