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dsExpat.h

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/*
 *
 * $Id: dsExpat.h,v 1.6 2004/10/19 09:39:59 dsamersoff Exp $
 *
 */

#ifndef dsExpat_h
#define dsExpat_h

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

#include <iostream>
#include <stack>

#include <dsSmartException.h>
#include <dsHashTable.h>
#include <dsutil.h>

using namespace std;

class dsExpatException : public dsSmartException
{
    int _lineno;
    int _colno;

public:
    dsExpatException(int lineno, int colno, const char *format, ... )
    { 
         _lineno = lineno;
         _colno = colno;
         va_list ap; 
         va_start(ap, format); 
         fire( "dsExpat", (char *) format, ap); 
         va_end(ap); 
     }

    
    std::ostream& print(std::ostream& os)
     {
          os << tag() << ":"<< _lineno << ":" << _colno << ": " << msg() << std::endl;
          return os;
     }
};


typedef stack <char *> tagStack; 

class dsExpat
{
    long _byte_index;
    int  _line_num;
    int  _col_num;
 
    char * _encoding; 

    tagStack _st;
    
    void readEntity(istream& is);

protected:
     dsExpat(const char *encoding = 0);
     virtual ~dsExpat();

//        Handlers 
     virtual void StartElementHandler(const char *name, dsHashTable* atts);
     virtual void EndElementHandler(const char *name);
     virtual void CharacterDataHandler(const char *s, int len);
     virtual void ProcessingInstructionHandler(const char *tagret, const char *data);
     virtual void CommentHandler(const char *data);

public:
    void Parse(std::istream& is);
    void Parse(const char *s, int len);

    long    GetCurrentByteIndex();
    int     GetCurrentLineNumber();
    int     GetCurrentColumnNumber();

    const tagStack& GetElementStack(); 
};


inline long dsExpat::GetCurrentByteIndex()
{ 
    return _byte_index; 
}

inline  int  dsExpat::GetCurrentLineNumber()
{
    return _line_num; 
}

inline int  dsExpat::GetCurrentColumnNumber()
{ 
    return _col_num; 
}

inline const tagStack& dsExpat::GetElementStack() 
{
        return _st;
}

class dsExpatDebug : public dsExpat
{

public:
     dsExpatDebug(const char *encoding = 0);

protected:

//        Handlers 
     virtual void StartElementHandler(const char *name, dsHashTable *atts);
     virtual void EndElementHandler(const char *name);
     virtual void CharacterDataHandler(const char *s, int len);
     virtual void ProcessingInstructionHandler(const char *tagret, const char *data);
     virtual void CommentHandler(const char *data);

};


#endif

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