XMLParser.cpp

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D 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 General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#include <XML/XMLParser.h>
#include <common/Defines.h>
#include <stdlib.h>
#include <stdio.h>

XMLParser::XMLParser(bool useContentNodes) : 
        root_(0), current_(0), 
        useContentNodes_(useContentNodes),
        source_("Not Specified")
{
        // Init the XML parser
        p_ = XML_ParserCreate(0);
        XML_SetStartElementHandler(p_, startElementStaticHandler);
        XML_SetEndElementHandler(p_, endElementStaticHandler);
        XML_SetCharacterDataHandler(p_, characterDataStaticHandler);
        XML_SetUserData(p_, this);
}

XMLParser::~XMLParser()
{
        // Cleanup
        XML_ParserFree(p_);
        delete root_;
}

bool XMLParser::parse(const char *data, int len, int final)
{
        // Parser the XML
        XML_Status status;
        status = XML_Parse(p_, data, len, final);
        return (status == XML_STATUS_OK);
}

const char *XMLParser::getParseError()
{
        XML_Error errorCode = XML_GetErrorCode(p_);

        static char message[1024];
        snprintf(message, 1024,
                "Parse Error, File %s: Line:%i Col:%i Error:%s",
                source_.c_str(),
                XML_GetCurrentLineNumber(p_),
                XML_GetCurrentColumnNumber(p_),
                XML_ErrorString(errorCode));
        return message;
}

void XMLParser::startElementHandler(const XML_Char *name,
                           const XML_Char **atts)
{
        if (!root_)
        {
                // Create the root node
                root_ = current_ = new XMLNode(name);
                root_->setUseContentNodes(useContentNodes_);
                root_->setSource(source_.c_str());
                root_->setLine(XML_GetCurrentLineNumber(p_),
                        XML_GetCurrentColumnNumber(p_));
        }
        else
        {
                DIALOG_ASSERT(current_);

                // Add a new child to this node
                XMLNode *newNode = new XMLNode(name);
                current_->setUseContentNodes(useContentNodes_);
                current_->addChild(newNode);
                current_ = newNode;
                current_->setLine(XML_GetCurrentLineNumber(p_),
                        XML_GetCurrentColumnNumber(p_));
        }

        if (atts)
        {
                while (*atts)
                {
                        const XML_Char *name = *atts;
                        atts++;
                        const XML_Char *value = *atts;
                        atts++;

                        XMLNode *param = new XMLNode(name, "", XMLNode::XMLParameterType);
                        param->addContent(value, strlen(value));
                        param->setLine(XML_GetCurrentLineNumber(p_),
                                XML_GetCurrentColumnNumber(p_));
                        current_->addParameter(param);
                }
        }
}

void XMLParser::endElementHandler(const XML_Char *name)
{
        DIALOG_ASSERT(current_);
        DIALOG_ASSERT(strcmp(name, current_->getName()) == 0);

        current_ = (XMLNode *) current_->getParent();
}

void XMLParser::characterDataHandler(const XML_Char *s,
                            int len)
{
        current_->addContent(s, len);
}

void XMLParser::startElementStaticHandler(void *userData,
                           const XML_Char *name,
                           const XML_Char **atts)
{
        XMLParser *parser = (XMLParser *) userData;
        parser->startElementHandler(name, atts);
}

void XMLParser::endElementStaticHandler(void *userData,
                         const XML_Char *name)
{
        XMLParser *parser = (XMLParser *) userData;
        parser->endElementHandler(name);
}

void XMLParser::characterDataStaticHandler(void *userData,
                            const XML_Char *s,
                            int len)
{
        XMLParser *parser = (XMLParser *) userData;
        parser->characterDataHandler(s, len);
}

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