c++ - Deep Copy an XML via TinyXML -

i using tinyxml.

how duplicate or create copy of existing xmldocument?

http://www.grinninglizard.com/tinyxmldocs/classtixmldocument.html#a4e8c1498a76dcde7191c683e1220882

i went through link says using clone replicate node. protected , not want go deriving class out of , like.

i not want save existing xmldocument file , making xmldocument object read file have copy of it.

i not able perform deep copy using memcpy because unaware of size of entire xml.

i not want having 2 objects being used 1 after other like:

xmldocumentobj1 = add_some_data  xmldocumentobj2 = add_the_same_data, , on 

the primary reason want second copy that, first might modified different sections of code, while same copy being 'read' @ multiple places. need ensure there occur no errors when xmldocument read, because there chances might have been modified in background running thread, , no program crashes.

here wrote deep copy. takes source node , copies under destination node, children , all. memory taken destination node's context. hopefully, it's start in right direction you.

void copynode(tinyxml2::xmlnode *p_dest_parent, const tinyxml2::xmlnode *p_src) {     // protect evil     if (p_dest_parent == null || p_src == null)     {         return;     }      // document context new memory allocated     tinyxml2::xmldocument *p_doc = p_dest_parent->getdocument();      // make copy     tinyxml2::xmlnode *p_copy = p_src->shallowclone(p_doc);     if (p_copy == null)     {         // error handling required (e.g. throw)         return;     }      // add child     p_dest_parent->insertendchild(p_copy);      // add grandkids     (const tinyxml2::xmlnode *p_node = p_src->firstchild(); p_node != null; p_node = p_node->nextsibling())     {         copynode(p_copy, p_node);     } }