Add parse function.

git-svn-id: https://subversion.assembla.com/svn/qmcdev/trunk@334 e5b18d87-469d-4833-9cc0-8cdfa06e9491

src/QMC/QMCApps.cpp

@@ -46,6 +46,33 @@ namespace ohmmsqmc {
     DEBUGMSG("QMCApps::~QMCApps")
   }
 
+  int QMCApp::parse(const string& infile) {
+
+    //already has documentation open. Remove it.
+    if(m_doc != NULL) {
+      xmlXPathFreeContext(m_context);
+      xmlFreeDoc(m_doc);
+    }
+
+    // build an XML tree from a the file;
+    m_doc = xmlParseFile(infile.c_str());
+    if (m_doc == NULL) {
+      ERRORMSG("File " << infile << " is invalid")
+      xmlFreeDoc(m_doc);
+      return 1;
+    }
+
+    // Check the document is of the right kind
+    xmlNodePtr cur = xmlDocGetRootElement(m_doc);
+    if (cur == NULL) {
+      ERRORMSG("Empty document");
+      xmlFreeDoc(m_doc);
+      return 1;
+    }
+
+    return !run(cur);
+  }
+
   bool QMCApps::setMCWalkers(xmlNodePtr aroot) {
 
     bool foundconfig=false;

src/QMC/QMCApps.h

@@ -38,11 +38,17 @@ namespace ohmmsqmc {
     ///destructor
     virtual ~QMCApps();
 
+    /**process input xml file
+     * @param infile input xml file
+     * @return 1 for any failed execution
+     */
+    int parse(const string& infile);
+
     ///initialization with a file
     virtual bool init() = 0;
 
     ///run it
-    bool run(xmlNodePtr aroot);
+    virtual bool run(xmlNodePtr aroot);
 
     void saveXml();