boris at codesynthesis.com
Tue May 15 15:10:10 EDT 2007
Vincent Jacques <vincent at vincent-jacques.net> writes:
> I use xsd with the default xerces parser.
> Basicaly, my xml document will come from a std::istream and I'm testing
> with std::cin for the moment. I use the xml_schema::document::parse
> method which takes a std::istream.
> My problem is that I have to close the stream (with Ctrl+D under Linux)
> before any parse event is trigered.
This is most likely because the underlying parser (Xerces-C++ in this
case) tries to read a chunk of data that is bigger than your document.
As a result when the code calls read() on std::cin the implementation
blocks until one of the two things happen:
(1) the amount of data requested is read
(2) the stream is finished (Ctrl+D)
I did a quick test and my version of Xerces-C++ (2.7.0) asks for
49152 bytes at a time. If you are interested, the code that ties
std::istream and the Xerces-C++ stream is in
One way to test that streaming works on small documents is to
change the readByte implementation and always read, say, 64
bytes instead of what Xerces-C++ asks in the 'size' argument.
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