lexer.h

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/************************************************************
* file: Lexer.h
* date: 2006-03-31
* author: wuzuyang
* describe: none; lexer
*************************************************************/

#include "common.h"

class Lexer{
private:
	char *src;
	int length;
	int index;
	char *buf;
	
public:
	Lexer(char *filename);
	Lexer();
	~Lexer();
	void reset();	// rewind index
	bool isReady();
	bool isFinished();
	char *getSrc();
	int getIndex();
	
	void setSrc(char *s, int len);
	
	Token nextToken();
};