mySaxInterface.cc

/*
    File: mySaxInterface.cc
*/
/*
Open Source License
Copyright (c) 2016, Christian E. Schafmeister
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
 
This is an open source license for the CANDO software from Temple University, but it is not the only one. Contact Temple University at mailto:techtransfer@temple.edu if you would like a different license.
*/
/* -^- */
#define	DEBUG_LEVEL_NONE

//
// (C) 2004 Christian E. Schafmeister
//

#include <string.h>
#include <clasp/core/foundation.h>
#include <clasp/core/lisp.h>
#include <clasp/core/lispStream.h>
#include <cando/adapt/mySaxInterface.h>


namespace adapt {
////////////////////////////////////////////////////////////////
//
//
//	getAttribute
//
//

    string	MySaxHandlerDefault::getAttribute(char* str) {
	const XML_Char	**pos;
	string	res;
	pos = this->attributes;
	while (*pos) {
	    if ( strcmp(*pos,str)==0 ) {
		res = *(pos+1);
		return res;
	    }
	    pos++;
	    pos++;
	}
	return "";
    }





//////////////////////////////////////////////////////////////
//
//
//	getAttributeCount
//
//

    int	MySaxHandlerDefault::getAttributeCount() {
	int		iCount;
	const XML_Char	**pos;
	iCount = 0;
	pos = this->attributes;
	while ((*pos)) {
	    pos++;
	    iCount++;
	}
	return iCount/2;
    }

//////////////////////////////////////////////////////////////
//
//
//	getAttributeAtIndex
//
//

    void	MySaxHandlerDefault::getAttributeAtIndex(int ind, string& attrName, string& attrVal )
    {
	const XML_Char	**pos;
	string	res;
	pos = this->attributes;
	while (*pos) {
	    if ( ind == 0 ) {
		attrName = *pos;
		attrVal = *(pos+1);
		return;
	    }
	    ind--;
	    pos++;
	    pos++;
	}
	attrName = "";
	attrVal = "";
	return;
    }













//
//
//    XML_SetStartElementHandler( this->parser, myExpatStartElement );
//
//
    static void	myExpatStartElement( 	void* 		userData,
					const	XML_Char	*name,
					const	XML_Char	**atts)
    {   
	MySaxParser*	parser = (MySaxParser*)userData;
	
	LOG("myExpatStartElement local name = %s" , (name ) );
	parser->handler->setLocalName(name);
	parser->handler->setLineNumber(XML_GetCurrentLineNumber(parser->getXMLParser()));
	parser->handler->setAttributes(atts);
	parser->handler->startElement();
	LOG("myExpatStartElement done" );
    }


    static void	myExpatEndElement( 	void* 		userData,
					const	XML_Char	*name )
    {
	MySaxParser*	parser = (MySaxParser*)userData;
	
	LOG("myExpatEndElement local name = %s" , (name ) );
	parser->handler->setLocalName(name);
	parser->handler->setLineNumber(XML_GetCurrentLineNumber(parser->getXMLParser()));
	parser->handler->endElement();
    }


    static void	myExpatCharacterData( 	void* 		userData,
					const	XML_Char	*data,
					int			len)
    {
	MySaxParser*	parser = (MySaxParser*)userData;
	
	char		*myBuffer;

	myBuffer = (char*)malloc(len+1);
	strncpy( myBuffer, data, len );
	myBuffer[len] = '\0';
	LOG("myExpatCharacterDataHandler characters: |%s|" , (myBuffer ) );
	parser->handler->setData(myBuffer);
	parser->handler->setDataLength(len);
	parser->handler->characters();
	free(myBuffer);
    }




// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
//
//	MySaxParser
//
//
    MySaxParser::MySaxParser()
    {
    }


    bool	MySaxParser::initialize()
    {
	LOG("MySaxParser::initialize starting" );
	LOG("MySaxParser::initialize Creating expat parser" );
	this->parser= XML_ParserCreate( "UTF-8" );
	XML_SetElementHandler( this->parser, myExpatStartElement, myExpatEndElement );
	XML_SetCharacterDataHandler( this->parser, myExpatCharacterData );
	XML_SetUserData( this->parser, (void*)this );
	return true;

    }



////MySaxParser//////////////////////////////////////////////////////////
//
// shutDown
//
//
    void	MySaxParser::shutDown()
    { 
	XML_ParserFree(this->parser);
    }

////MySaxParser//////////////////////////////////////////////////////////
//
// setContentHandler
//
//
    void	MySaxParser::setContentHandler(MySaxHandlerDefault *aHandler )
    {
	LOG("MySaxParser::setContentHandler" );
	this->handler = aHandler;

    }



    int	xml_fread( char* buffer, int numBytes, core::T_sp fIn )
    {
	char* cp;
	int	c, c2;
	cp = buffer;
	int sz;
	sz = 0;
	int limBytes = numBytes;
	while ( (core::clasp_peek_char(fIn)!=EOF) && sz < limBytes )
	{
	    c = core::clasp_read_char(fIn);
	    if ( c == '&' )
	    {
                c = core::clasp_read_char(fIn);
                if ( c == EOF ) break;
		if ( c == '&' )
		{
		    *cp = '&';
		} else {
		    c2 = core::clasp_read_char(fIn);
                    if ( c2 == EOF ) break;
		    if ( c == 'g' && c2 == 't' )
		    {
			*cp = '>';
		    } else if ( c == 'l' && c2 == 't' )
		    {
			*cp = '<';
		    }
		}
	    } else
	    {
		*cp = c;
	    }
	    cp++;
	    sz++;
	}
	return sz;
    }




////MySaxParser//////////////////////////////////////////////////////////
//
//	parse
//
//	Parse the file, return true if everything was ok
//
    bool	MySaxParser::parse(core::T_sp fIn)
    {
	unsigned char	buffer[BUFSIZ];
	uint		sz;
	XML_Status		xmlStatus;
	int			done;
	long		filePos;

	LOG("MySaxParser::expat:: opening file: %s" , (fileName.c_str() ) );

//    this->_Progress.setMax(fileSize);
//    this->_Progress.setSteps(fileSize/10000);
	filePos = 0;
	while ( core::clasp_peek_char(fIn) != EOF )
	{
	    LOG("MySaxParser::expat:: reading/parsing block of data asking for buffer with up to %d bytes" , sizeof(buffer) );
            sz = core::clasp_read_byte8(fIn,buffer,sizeof(buffer));
	    filePos = filePos + sz;
	    done = sz < sizeof(buffer);
	    LOG("Read line from buffer - hit eof=%d read[%d bytes]" , done , sz );
	    xmlStatus = XML_Parse( this->parser, (char*)buffer, sz, done );
	    if ( xmlStatus == XML_STATUS_ERROR ) {
              SIMPLE_ERROR(("Parse failed for stream: %s") , _rep_(fIn));
	    }
	}
//    this->_Progress.finish();
	LOG("MySaxParser::expat:: parse succeeded!!!!" );
	return true;
    }



};