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POC++: Trouble with Parsing XML using Libxml
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  1. POC++: Trouble with Parsing XML using Libxml
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    copied!<p>I am having a lot of trouble working with the libxml2 library to parse an xml file.</p> <p>I have weeded out a previous, similar problem, but have run into another.</p> <p>Here is the problem code:</p> <pre><code>class SSystem{ public: //Constructors SSystem(){}; //Make SSystem from XML Definition. Pass ptr to node SSystem(xmlNodePtr Nptr, xmlDocPtr Dptr){ name = wxString((char *)xmlGetProp(Nptr, (xmlChar*)"name"), wxConvUTF8); //Move to next level down, the &lt;general&gt; element Nptr = Nptr-&gt;xmlChildrenNode; //Move one more level down to the &lt;radius&gt; element Nptr = Nptr-&gt;xmlChildrenNode; //Get Radius value if (!xmlStrcmp(Nptr-&gt;name, (const xmlChar *)"radius")) { char* contents = (char*)xmlNodeGetContent(Nptr); std::string test1 = std::string(contents); radius = wxString(contents, wxConvUTF8); } } </code></pre> <p>Both an xmlNodePtr and an xmlDocPtr are passed to the constructor, which works fine taking just a property ("name"), but is now choking on further parsing.</p> <p>Here is a piece of the xml file in question:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;Systems&gt; &lt;ssys name="Acheron"&gt; &lt;general&gt; &lt;radius&gt;3500.000000&lt;/radius&gt; &lt;-- I am trying to get this value (3500). &lt;stars&gt;300&lt;/stars&gt; &lt;asteroids&gt;0&lt;/asteroids&gt; &lt;interference&gt;0.000000&lt;/interference&gt; &lt;nebula volatility="0.000000"&gt;0.000000&lt;/nebula&gt; &lt;/general&gt; </code></pre> <p>It compiles fine, but crashes when the constructor is loaded (I know because, if I comment out the if conditional and the char* contents = (char*)xmlNodeGetContent(Nptr->xmlChildrenNode), it runs fine.</p> <p>I've tried so many different things (removed one of the Nptr->xmlChildrenNode), but nothing works.</p> <p>What is wrong?</p>
 

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