A C++ Implementation of DOM Core Code

#include <iostream.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

#include <DOM.h>


void  printTree(Node* node, int depth);
void  printTextNode(Text* txt, int depth);


void main(int argn, char* argv[])
{
  if (argn != 3)
    {
      printf("usage:  %s  <xmlFile>  <dtdFile> \n", argv[0]);
      exit(1);
    }
  char* xmlFile = argv[1];
  char* dtdFile = argv[2];

  Document* xmlDoc = new Document(xmlFile);
  xmlDoc->getImplementation()->docParse(xmlFile, dtdFile);

  // print what has been constructed
  cout << "\n\nThe XML structure in memory contains: \n\n";
  Element* xmlRoot = xmlDoc->getDocumentElement();
  if (xmlRoot != NULL)  printTree(xmlRoot, 0);

  cout << "\n\nThe DTD structure in memory contains: \n\n";
  xmlDoc->getDoctype()->print(cout);

  delete xmlDoc;
}


void  printTree(Node* node, int depth)
{
  String name = node->getNodeName();
  short  type = node->getNodeType();

  if (type == Node::TEXT_NODE)   printTextNode( (Text*)node, depth);
  if (type != Node::ELEMENT_NODE)  return;

  for (int i=0; i < depth; i++)  cout << "   ";
  cout << "<" << name;

  // print attributes
  NamedNodeMap* attrList = node->getAttributes();
  if (attrList != NULL)
    for (int i=0; i < attrList->getLength(); i++)
      {
        Attr* attr = (Attr*) attrList->item(i);
        if (attr != NULL)
            cout << " " << attr->getName() << "=" << attr->getValue();
      }
  cout << ">" << endl;

  // print children
  Node* child = node->getFirstChild();
  while (child != NULL)
    {
      printTree(child, depth+1);
      child = child->getNextSibling();
    }

  for (int i=0; i < depth; i++)  cout << "   ";
  cout << "</" << name << ">" << endl; 
}


void printTextNode(Text* txt, int depth)
{
  char* cData = txt->getData();
  char cData1[strlen(cData) + 1];

  char* cp  = cData;
  char* cp1 = cData1;
  int space = 0;
  while (*cp) 
    {
      if ( isspace(*cp) )   space++;
      else   space = 0;
      if (space == 0)  *cp1++ = *cp++;
      else if (space == 1) { *cp1++ = ' ';   cp++; }
      else  cp++;
    }
  *cp1 = 0;
  if ( space == strlen(cData) )  return;
 
  for (int i=0; i < depth; i++)  cout << "   ";
  cout << cData1 << endl;
}