Find a specific node in a XML document with TinyXML

Question

I want to parse some data from an xml file with TinyXML.

Here's my text.xml file content:

<?xml version="1.0" encoding="iso-8859-1"?>
<toto>
  <tutu>
    <tata>
      <user name="toto" pass="13" indice="1"/>
      <user name="tata" pass="142" indice="2"/>
      <user name="titi" pass="azerty" indice="1"/>
    </tata>
  </tutu>
</toto>

I want to access to the first element 'user'. The way to do this is the following :

TiXmlDocument   doc("test.xml");

    if (doc.LoadFile())
    {
        TiXmlNode *elem = doc.FirstChildElement()->FirstChildElement()->FirstChildElement()->FirstChildElement();
std::cout << elem->Value() << std::endl;
}

In output : user.

But the code is pretty ugly and not generic. I tried the code below to simulate the same behaviour than the code above but it doesn't work and an error occured.

TiXmlElement *getElementByName(TiXmlDocument &doc, std::string const &elemt_value) 
{
    TiXmlElement *elem = doc.FirstChildElement(); //Tree root

    while (elem)
    {
        if (!std::string(elem->Value()).compare(elemt_value))
            return (elem);
        elem = elem->NextSiblingElement();
    }
    return (NULL);
}

Maybe I missed a special function in the library which can do this work (a getElementByName function). I just want to get a pointer to the element where the value is the one I'm looking for. Does anyone can help me? Thanks in advance for your help.

Answer 1

Try this

TiXmlElement * getElementByName(TiXmlDocument & doc, std::string const & elemt_value) {

   TiXmlElement * elem = doc.RootElement(); //Tree root
   while (elem) {
      if (!std::string(elem - > Value()).compare(elemt_value)) return (elem);
      /*elem = elem->NextSiblingElement();*/
      if (elem - > FirstChildElement()) {
         elem = elem - > FirstChildElement();
      } else if (elem - > NextSiblingElement()) {
         elem = elem - > NextSiblingElement();
      } else {
         while (!elem - > Parent() - > NextSiblingElement()) {
            if (elem - > Parent() - > ToElement() == doc.RootElement()) {
               return NULL;
            }
            elem = elem - > Parent() - > NextSiblingElement();
         }
      }
   }
   return (NULL);
}