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/* 
nsIMAPGenericParser is the base parser class used by the server parser and body shell parser
*/ 

#ifndef nsIMAPGenericParser_H
#define nsIMAPGenericParser_H

#include "nsImapCore.h"

#define WHITESPACE " \015\012"     // token delimiter 


class nsIMAPGenericParser 
{

public:
	nsIMAPGenericParser();
	virtual ~nsIMAPGenericParser();

  // Connected() && !SyntaxError()
	// Add any specific stuff in the derived class
  virtual PRBool     LastCommandSuccessful();
    
  PRBool     SyntaxError();
  virtual PRBool     ContinueParse();
    
  // if we get disconnected, end the current url processing and report to the
  // the user.
  PRBool			    Connected();
  virtual void        SetConnected(PRBool error);
    
  char        *CreateSyntaxErrorLine();

protected:

	// This is a pure virtual member which must be overridden in the derived class
	// for each different implementation of a nsIMAPGenericParser.
	// For instance, one implementation (the nsIMAPServerState) might get the next line
	// from an open socket, whereas another implementation might just get it from a buffer somewhere.
	// This fills in nextLine with the buffer, and returns PR_TRUE if everything is OK.
	// Returns PR_FALSE if there was some error encountered.  In that case, we reset the parser.
	virtual PRBool	GetNextLineForParser(char **nextLine) = 0;	

  virtual void	HandleMemoryFailure();
  virtual void    skip_to_CRLF();
  virtual void    skip_to_close_paren();
	virtual char	*CreateString();
	virtual char	*CreateAstring();
	virtual char	*CreateNilString();
  virtual char    *CreateLiteral();
	virtual char	*CreateAtom();
  virtual char    *CreateQuoted(PRBool skipToEnd = PR_TRUE);
	virtual char	*CreateParenGroup();
  virtual void        SetSyntaxError(PRBool error);
  virtual PRBool     at_end_of_line();

  void AdvanceToNextToken();
  void AdvanceToNextLine();
	void AdvanceTokenizerStartingPoint (int32 bytesToAdvance);
  void ResetLexAnalyzer();

protected:
	// use with care
  char           *fNextToken;
  char           *fCurrentLine;
	char					 *fLineOfTokens;
  char           *fStartOfLineOfTokens;
  char           *fCurrentTokenPlaceHolder;
  PRBool          fAtEndOfLine;

  char           *fSyntaxErrorLine;
  PRBool          fSyntaxError;
private:
  PRBool          fDisconnected;


};

#endif