How to check if DTD or Doc is loaded ?

[Mat D <matthias dieudonne gmail com>]

Hi everyone,

I am using the c++ Libxml Lib & I want to free DTD & xml loaded ONLY if they are .

Because if I use those functions twice it crash the lib because documents have already been free :

xmlFreeDtd();

xmlFreeDoc();

How to check if a dtd/doc is loaded ?

I tried things as: 

if(dtdPtr->type == XML_DTD_NODE){
  std::cout << "free memory now .." << std::endl;
  xmlFreeDtd(dtdPtr);
}

But it does not work :s

Thanks by advance for help!!