Default dir for application data

[Todor Todorov <ttodorov gmx net>]

Hello list

I skimmed the docs for the current stable release on gtk.org, but was 
not able to find anything relating to my problem. If for example my 
application is installed globally with DATA_DIR set to /usr/share, is 
there some function in GLib or GTK which would give me the global app 
data dir (i.e. /usr/share/MyApp) or the user owned app data dir (i.e. 
$HOME/.config/MyApp) - either as an GFile or path (gchar*)?

Thanks for your help!

Regards,
Todor