atrespparser.h

MTK平台COM口通讯的源代码。很底层的。可以学习一下。

/*****************************************************************************
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#ifndef _ATRESPPARSER_H
#define _ATRESPPARSER_H

#define AT_RESP_PARSER_BUFFER_LENGTH 8960

#include "ATResult.h"
#include "CircularBuf.h"
#include "Thread.h"

#include <string>

using namespace std;

typedef void (*unSolicitedCallback)(ATResult& result);

class ATRespParser
{
private:
	char respDataBuf[AT_RESP_PARSER_BUFFER_LENGTH];
	int  readIndex;
	int  writeIndex;
	

	HANDLE					m_hThread;
	HANDLE					m_ThreadId;

	HANDLE					m_hWriteEvt;
	HANDLE					m_hParserEvt;
	HANDLE					m_hStopEvt;
	HANDLE                  m_hWaitGtAndSpace;

	ACircularBuf<unsigned char> *Raw_Buffer;

	bool					stopEvent;
	char cr;
	char lf;

	string t;

	// This is the local varialbe
	ATResult				result;
	bool					pduFlag;
	ATResult				unsolicitedRt;

	unSolicitedCallback		m_usc_cb;

	bool					m_waitGtAndSpace;
	


public:
	ATRespParser();
	~ATRespParser();

	bool AnalyingBuffer();
	bool AnalyingRespString();

	bool StartParsing(	ACircularBuf<unsigned char> *raw_data, 
						unSolicitedCallback cb);
	bool StopParsing();

	char GetCrByte();
	char GetLfByte();
	bool SetCrByte(char _cr);
	bool SetLfByte(char _lf);
	void FillBufferByState(unsigned char ch, int &state);
	void SetExpectString(string string);
	void SetPduFlag(bool flag);
	void GetResult(ATResult& rt);
	void CleanResult(ATResult& rt);
	HANDLE GetWriteEvent();
	HANDLE GetParserEvent();
	HANDLE GetWaitGtAndSpaceEvent();
	void Sync();
	bool CheckIfGetGtandSpace();
	void SetWaitGtAndSpace(bool flag);
	void SetCallBack(void(*unSolicitedFunc)(ATResult& result));
	



private:

	bool GetString(char *ptr, int& wi, ATParamElem& elem);
	bool GetString(char *ptr, int& wi, ATParamLst& lst);
	bool GetLstString(char *ptr, int& wi, ATParamElem& elem);

	bool GetInterval(char *ptr, int length, ATResult& result);
	bool GetInteger(char *ptr, int length, ATResult& result);
	bool GetList(char *ptr, int& wi, ATParamElem& elem);
	bool GetList(char *ptr, int& wi, ATParamLst& lst);
	bool GetLstParam(char *ptr, ATParamElem& elem);
	bool GetParam(char *ptr, ATParamElem& elem, bool isString);
	bool GetParam(char *ptr, ATParamLst& lst, bool isString);

	bool GetOneCrLf();
	bool IsNumber(char *ptr);
	bool IsUnsolicited(string command, ATParamLst& lst);
	bool GetPdu(char *buf, const int maxLen);
	bool UnsolicitedGetPdu(char *buf, const int bufLen, ATParamLst& lst);

	bool GetStringToBuf(char *buf, int& wi, const int size);
	bool SkipComma(char *buf, int& ri, const int size);

	HANDLE GetHandle()
	{
		return m_hThread;
	}
	
	void WaitForExit();
	bool StartThread();


	// For thread operation
	DWORD WINAPI ThreadFunc();
	void StopThread();

	static DWORD HelpThreadFunc(LPVOID param);

};
#endif