tokenizer.h

来自「一个完整的C语言编译器」· C头文件 代码 · 共 63 行

#ifndef _TOKENIZER_H_
#define _TOKENIZER_H_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// tokenizer.h : header file
//

// now should be defined the token types
#define TT_EOL		'\n'
#define TT_EOF		-1
#define TT_INTEGER	-2
#define TT_REAL		-3
#define TT_WORD		-4
#define TT_STRING	'"'
#define TT_CHAR		'\''

class CTokenizer : public CObject
{
public:
	CTokenizer(CString& string);	// Constructor
	virtual ~CTokenizer();		    // Destructor

private:
	// inline function
	inline TCHAR GetChar() { return m_sString[m_iChar++]; }

private:
	CString m_sString;			// the tokenized string

	BOOL m_bSlSlComments;		// Slash slash comments enabled
	BOOL m_bSlStComments;		// Slash star comments enabled
	BOOL m_bEolIsSignificant;	// Specifies that EOL is significant or not
	BOOL m_bForceLower;			// Enable / disable case sensitivity
	BOOL m_bPushedBack;			//Enable Pushed Back

	int	 m_peekc;
	int  m_iLineNo;
	int  m_tType;				// The last read token type
	
protected:
	CString	m_sVal;				// the value of the token
	double	m_dVal;
	int		m_iChar;			// the index of the current character

public:
	double GetDoubleNumValue();
	int	GetIntNumValue();	
	virtual CString GetStrValue();

	int  LineNo();
	void PushBack();
	int  NextToken();			// gives the next Token, returns the token type

	void LowerCaseMode(BOOL bFlag);		// Enable / disable case sensitivity
	void SlSlComments(BOOL bFlag);		// Enable C++ Style comments
	void SlStComments(BOOL bFlag);		// Enable C Style comments
	void EolIsSignificant(BOOL bFlag);	// Specifies that EOL is significant or not
};

#endif