/*
* <xml_parser.cpp>
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2008
* (C) OPAC Team, LIFL, 2002-2008
*
* Sebastien Cahon, Alexandru-Adrian Tantar, Clive Canape
*
* This software is governed by the CeCILL license under French law and
* abiding by the rules of distribution of free software.  You can  use,
* modify and/ or redistribute the software under the terms of the CeCILL
* license as circulated by CEA, CNRS and INRIA at the following URL
* "http://www.cecill.info".
*
* As a counterpart to the access to the source code and  rights to copy,
* modify and redistribute granted by the license, users are provided only
* with a limited warranty  and the software's author,  the holder of the
* economic rights,  and the successive licensors  have only  limited liability.
*
* In this respect, the user's attention is drawn to the risks associated
* with loading,  using,  modifying and/or developing or reproducing the
* software by the user in light of its specific status of free software,
* that may mean  that it is complicated to manipulate,  and  that  also
* therefore means  that it is reserved for developers  and  experienced
* professionals having in-depth computer knowledge. Users are therefore
* encouraged to load and test the software's suitability as regards their
* requirements in conditions enabling the security of their systems and/or
* data to be ensured and,  more generally, to use and operate it in the
* same conditions as regards security.
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL license and that you accept its terms.
*
* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
* Contact: paradiseo-help@lists.gforge.inria.fr
*
*/

#include <libxml/xmlreader.h>

#include "xml_parser.h"

static xmlTextReaderPtr reader;

void openXMLDocument (const char * __filename)
{

  reader = xmlNewTextReaderFilename (__filename);

  if (! reader)
    {

      fprintf (stderr, "unable to open '%s'.\n", __filename);
      exit (1);
    }
}

void closeXMLDocument ()
{

  xmlFreeTextReader (reader);
}

std :: string getAttributeValue (const std :: string & __attr)
{

  xmlChar * value = xmlTextReaderGetAttribute (reader, (const xmlChar *) __attr.c_str ());

  std :: string str ((const char *) value);

  xmlFree (value);

  return str;
}

static bool isSep (const xmlChar * __text)
{

  for (unsigned i = 0; i < strlen ((char *) __text); i ++)
    if (__text [i] != ' ' && __text [i] != '\t' && __text [i] != '\n')
      return false;
  return true;
}

std :: string getNextNode ()
{

  xmlChar * name, * value;

  do
    {
      xmlTextReaderRead (reader);
      name = xmlTextReaderName (reader);
      value = xmlTextReaderValue (reader);
    }
  while (! strcmp ((char *) name, "#text") && isSep (value));

  std :: string str;

  if (strcmp ((char *) name, "#text"))
    str.assign ((char *) name);
  else
    str.assign ((char *) value);

  if (name)
    xmlFree (name);
  if (value)
    xmlFree (value);

  return str;
}