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// cooLexxer.h: interface for the cooLexxer class.
//
//////////////////////////////////////////////////////////////////////
/*********************************************************************
Class: cooLexxer
Author: Alexander Berthold
Copyright: Alexander Berthold
Date: 19.4.2001
Purpose: - Main class for the lexical analyzer.
- Scans the input character stream for tokens.
- Calls a call-back class ('cooLexxerListener') for each
recognized token.
- Uses an incremental scan; should be pretty fast.
- Can also parse computed tokens, like "text" and 1234.
You may freely use this code in your projects. If you find
any bugs or if you make other corrections/enhancements, i'd
appreciate if you'd let me know about that. My email is
alexander-berthold@web.de
If you share this code, please do not remove this text.
*********************************************************************/
#if !defined(AFX_COOLEXXER_H__D79EE6C7_40E0_4452_A7A4_20278169F438__INCLUDED_)
#define AFX_COOLEXXER_H__D79EE6C7_40E0_4452_A7A4_20278169F438__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class cooLexxerInputStream;
class cooLexxerListener :
public ctkCheckValid,
public ctkExternalObjectPointer
{
// Operations
public:
virtual void vRegisterToken(const std::tstring& strTokenText, const cooLexxerTokenRule* pltrRule) = 0;
};
class cooLexxer
{
// Construction/Destruction
public:
cooLexxer(cooLexxerInputStream* plisData,
cooLexxerMap* plmLexxerMap,
cooLexxerListener* pllReceiver);
virtual ~cooLexxer();
// Attributes
protected:
// Contains the state of the lexxer
cooLexxerContext m_lcContextInfo;
// The 'tree' containing the tokens
cooLexxerMap *m_plmLexxerMap;
// The input stream
cooLexxerInputStream *m_plisData;
// The listener to the token output
cooLexxerListener *m_pllReceiver;
// ctkCheckValid operations
public:
#ifdef _DEBUG
virtual bool fCheckValid() const;
static bool fRunDiagnostics();
#else
virtual bool fCheckValid() const { return true; };
#endif
// Protected operations
protected:
/*** Internal token recognition methods ***/
// A delimeting token has been recognized
void vDelimTokenRecognized();
// A non-delimeting token has been recognized
void vRecognizeNonDelimTokens(std::tstring strTokenText);
/*** Post token recognition methods ***/
// Is called by the lexxer after a token has been recognized
void vRegisterToken(const std::tstring& strTokenText, cooLexxerTokenRule* pptrRule);
/*** Helper functions ***/
// Find the longest currently active (completed) rule
cooLexxerContext::cooListEntry
*pleFindEarliestCompletedToken();
// Find the longest applied rule, not yet invalidated rule
cooLexxerContext::cooListEntry
*pleFindEarliestAppliedToken();
// Mark all active rules except the given one for deletion
void vMarkAllForDeletionExcept(const cooLexxerContext::cooListEntry* pEntry);
// Operations
public:
// Parse the next character, 'fOverrideIsLastChar' tells if the next
// char is to be treated as it was the last of the stream.
void vParseCharacter(bool fOverrideIsLastChar = false);
};
#endif // !defined(AFX_COOLEXXER_H__D79EE6C7_40E0_4452_A7A4_20278169F438__INCLUDED_)
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