/*
	CXml2Txt header

	Last modified: 12.12.03
*/

#ifndef		__CXML2TXT_
#define		__CXML2TXT_


#define _LARGEFILE64_SOURCE
#include <features.h>

#include	<stdio.h>
#include	<sstream>
#include	<string>
#include	<list>

using		std::ostringstream;
using		std::string;
using		std::list;

#define		STREAM_BUF_SIZE			32768
#define		MAX_TAG_NAME			1024
#define		MAX_TAG_ATTRIB_NAME		1024
#define		MAX_TAG_ATTRIB_VAL		1024
#define		ERROR_BUF_SIZE			1024


// For error-throwing:
class Error
	{
	public:
		string m_str;

		Error(string sX) : m_str(sX) { }
	};

// Useful string convertion routine:
template<typename T>
inline string to_string(const T &value)
 {
 ostringstream streamOut;

 streamOut << value;

 return streamOut.str();
 }


// XML to TXT convertor:
class CXml2Txt
	{
	public:
		/* ---				Ctor/Dtor			--- */
		CXml2Txt();
		virtual	   ~CXml2Txt();

		typedef enum	tag_f_close
			{
			ALL = 0,
			SRC = 1,
			DST = 2
			} f_close;

		/* ---	 			Methods				--- */
		void			Open(string, string) /* throw(Error) */;
		
		unsigned long	Convert(const char = '\t') /* throw(Error) */;
		
		void			Close(f_close = ALL);
		
		void			SetPause(bool = true);

		void			SplitOutput(unsigned long = 0);

		void			BeVerbose(bool = true);			

	protected:
		FILE			*m_fin,						// Input  file
						*m_fout;					// Output file
		string			 m_sSrc,					// File
						 m_sDst;					// names
		char			 m_sep;						// Output separator
		unsigned long	 m_tags_per_part;			// Tags per part
		bool			 m_pause;					// Pause between parts
		bool			 m_verbose;					// Verbosity
		char			 m_szError[ERROR_BUF_SIZE];	// Current error

		typedef struct	tag_attrib
			{
			string	sName;
			string  sValue;
			}  attrib;								// Tag attribute

		typedef struct	tag_tag 
			{
			string			sName;
			list<attrib>	lAttribList;
			}  tag;				

		virtual void    AnalyzeTag(tag &);			// Tag analyzer

	private:
		/* ---			Disabled Ctors			--- */
		CXml2Txt(const CXml2Txt &);


		/* ---			Internal data			--- */
		char  			m_ch,						// Current stream char
						m_last_ch;					// Last stream char
		unsigned long 	m_line_cnt;					// Line counter

		char			m_buf[STREAM_BUF_SIZE];		// Stream buffer
		size_t			m_idx, m_max;				// Used in GetNext();

		typedef enum	tag_state
								{
								eText,
								eTag,
								eError,
								eEOF
								}  state;			// Machine's state

		state	m_state, m_prev_state;

		/* ---			Internal methods		--- */
		void	ParseText();
		void	ParseTag();
		void	ParseTagName(string &);
		void	ParseTagAttribName(string &);
		void	ParseTagAttribVal(string &);
		void    ParseTagEnd();
		void	ChangeState(state);
		char	GetNext();
		void	On_EndOfFile();
	};

#endif

//