[xml] Progress control when using SAX

[Jordi Rovira i Bonet <igurnebli users sourceforge net>]

Hello,

   I'm using the SAX interface to parse big XML files (around 100 Mb.). 
I switched from DOM to SAX because of the size of files, but now i don't 
know how to control the progress of the parsing operation (to show a 
progress bar to the user). I know that is possible to get the line of 
the file where the parsing is in a given moment, but this doesn't seem 
the best way to do this (XML file could be only one line and 100 Mb). 
Apart of this you sholud know a priori the number of lines of the file.
   I guess that i'm not the first one to have this problem but i 
haven't found any documentation or messages in the mailing list about it.
   Any help would be appreciated.

Thanks in advance

J.