main.cc

This library provides a C++ interface to XML files. It uses libxml 2 to access the XML files, and in

// -*- C++ -*-

/* main.cc
 *
 * Copyright (C) 2002 The libxml++ development team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <libxml++/libxml++.h>

#include <iostream>

void print_indentation(unsigned int indentation)
{
  for(unsigned int i = 0; i < indentation; ++i)
    std::cout << " ";
}

void print_node(const xmlpp::Node* node, unsigned int indentation = 0)
{  
  std::cout << std::endl; //Separate nodes by an empty line.
  
  const xmlpp::EntityReference* nodeEntityReference = dynamic_cast<const xmlpp::EntityReference*>(node);

  if(nodeEntityReference)
  {
    print_indentation(indentation);
    std::cout << "entity reference name = " << nodeEntityReference->get_name() << std::endl;
    std::cout <<  "  resolved text = " << nodeEntityReference->get_resolved_text() << std::endl;
    std::cout <<  "  original text = " << nodeEntityReference->get_original_text() << std::endl;
  }

  const xmlpp::ContentNode* nodeContent = dynamic_cast<const xmlpp::ContentNode*>(node);
  if(!nodeContent)
  {
    //Recurse through child nodes:
    xmlpp::Node::NodeList list = node->get_children();
    for(xmlpp::Node::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
    {   
      print_node(*iter, indentation + 2); //recursive
    }
  }
}

int main(int argc, char* argv[])
{
  std::string filepath;
  if(argc > 1 )
    filepath = argv[1]; //Allow the user to specify a different XML file to parse.
  else
    filepath = "example.xml";
  
  try
  {
    xmlpp::DomParser parser;
    //parser.set_validate();
    parser.set_substitute_entities(false);
    parser.parse_file(filepath);
    if(parser)
    {
      //Walk the tree:
      const xmlpp::Node* pNode = parser.get_document()->get_root_node(); //deleted by DomParser.
      print_node(pNode);
    }
  }
  catch(const std::exception& ex)
  {
    std::cout << "Exception caught: " << ex.what() << std::endl;
  }

  return 0;
}