Finding the byte offset of an event in the input stream

["Coursimault, Jean-marc" <Co...@xrce.xerox.com>]

Hello all,

I'm trying to find the exact byte offset (in the input stream) of each event
reported by the Sax parser, i.e. "the tag <xyz> begins at the n-th character
of the input file" 

I see that there is a Locator object that is supposed to return the line and
column of an event : but I don't understand neither the "line and column"
idea - to me the document is only a stream of bytes (or possibly Unicode
characters) - , nor exactly how to implement this object.

In the InputDataStream::readBytes function, I read the input data by chunks,
as requested, and I cannot therefore maintain a byte count to where
precisely the parser is. I guess that the parser needs to read a lot of data
(perhaps all) in advance too.

If I use parser->getScanner()).getSrcOffset(), I get values that seem
unrelated to the actual input.

I've read the docs and FAQ , I've traced this function to
XMLReader::getSrcOffset() and I'm stumped.

Any help would be greatly appreciated.
Thanks in advance


-- Jean-Marc
____________________________________________________________
Jean-Marc Coursimault         |
Xerox Research Centre Europe  | Tel   +33 (0)4 76 61 51 82
Advanced Technology & Systems | Fax   +33 (0)4 76 61 51 99
6, chemin de Maupertuis       |  
38240 Meylan (France)         | coursimault@xrce.xerox.com
 

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