Does gtk2 provide a case 'in'-sensitive text search via 'gtk_text_iter_..._search'?

["David C. Rankin" <drankinatty suddenlinkmail com>]

All (I apologize if you get 2, post yesterday never went through),

  I'm pretty sure the answer is No, but I have a GtkTextBuffer within a
text_view widget that I writing a search dialog for with option for
'case-insensitive' search. (the default search by
gtk_text_iter_forward_search, and ...reverse_search is case-sensitive).

  I don't seem to be able to find a gtk2 function within the gtk_text_view...,
gtk_text_buffer... or gtk_text_iter... set of functions or any buffer, view or
iter property that provides a case insensitive search.

  Absent some specific function or property, my thought is just to duplicate
the buffer (or sections of it at a time), convert it to lower-case, search on
a lower-case string, and then translate any found iter offset from the
lower-case buffer back to the original.

  Before I take off down that rabbit trail, I thought I would check to make
sure I'm not just missing something obvious (either from gtk2 or a solution
here I can't find). I've been though the GTK+2 Reference Manual and exhausted
my search here, and generally for a gtk2 default solution.

  Does gtk2 provide anything by default for a case insensitive text_buffer search?

-- 
David C. Rankin, J.D.,P.E.