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//====================================================================
// Although great care has gone into developing this software,
// it is provided without any guarantee of reliability, accuracy
// of information, or correctness of operation.  I am not responsible
// for any damages that may occur as a result of using this software.
// Use this software entirely at your own risk.
// Copyright 2003, Chris Richardson
//
// Description: An abstract source stream for lexer input.
//
//====================================================================

#if !defined(AFX_CSTREAM_H__B70A7997_8640_44DD_8CB7_6694460DBC98__INCLUDED_)
#define AFX_CSTREAM_H__B70A7997_8640_44DD_8CB7_6694460DBC98__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CStream  
{
public:
	CStream();
	virtual ~CStream();
   
   virtual TCHAR           GetC() = 0;
   virtual TCHAR           UngetC( TCHAR p_cC ) = 0;

   virtual TCHAR *         GetS( TCHAR * p_pszStr, int p_iLength ) = 0;
   
   virtual unsigned long   GetPos() = 0;
   virtual void            SetPos( unsigned long p_ulPos ) = 0;
   
   // A file stream would return the path of the file probably.
   // Other types of streams could return something useful.
   // The name of the stream is used for example, when reporting
   // the locations of errors.
   virtual const TCHAR *   GetName() = 0;
};

#endif // !defined(AFX_CSTREAM_H__B70A7997_8640_44DD_8CB7_6694460DBC98__INCLUDED_)