[xml] xmlReader and _private

[Christophe de Vienne <cdevienne alphacent com>]

Hi,

While implementing xmlReader wrapper for libxml++ I faced a little 
problem with the _private field of xmlNode. xmlReader implementation in 
libxml2 do use this field, and since we use it in libxml++ to store a 
pointer to a xmlpp::Node which is automatically instanciated in the 
xmlRegisterNodeDefault callback, it leads to a segfault when it is 
deleted in the xmlDeregisterNodeDefault callback.

I see 2 potential solutions to the problem :
1) Change libxml xmlreader implementation so it does not use 
_xmlNode._private.
2) Detect in the callbacks wether or not the node is created by 
xmlReader, and then don't do anything if it is the case. I would then 
implement Expand by copying the subtree to avoid some non wrapped nodes 
to be given to libxml++ user.

Is one of this options possible ? And if not is there any other way to 
solve this issue ?


Thanks,

Christophe de Vienne