serialbuffer.h

一个串口编程的例子

// SerialBuffer.h: interface for the CSerialBuffer class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_SerialBuffer_H__FD164A5F_9F09_451B_8E42_180999B4DB9A__INCLUDED_)
#define AFX_SerialBuffer_H__FD164A5F_9F09_451B_8E42_180999B4DB9A__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include <string>


class CSerialBuffer  
{
	std::string m_szInternalBuffer;
	CRITICAL_SECTION	m_csLock;
	long	m_iCurPos;
	long	m_alBytesUnRead;
	void	Init();
	void	ClearAndReset(HANDLE& hEventToReset);
public:
	inline void LockBuffer() {::EnterCriticalSection(&m_csLock );}
	inline void UnLockBuffer() {::LeaveCriticalSection(&m_csLock );} 
	 
	
	CSerialBuffer( );
	virtual ~CSerialBuffer();

	//---- public interface --
	void AddData( char ch ) ;
	void AddData( std::string& szData ) ;
	void AddData( std::string& szData,int iLen ) ;
	void AddData( char *strData,int iLen ) ;
	std::string GetData() {return m_szInternalBuffer;}

	void		Flush();
	long		Read_N( std::string &szData,long alCount,HANDLE& hEventToReset);
	bool		Read_Upto( std::string &szData,char chTerm,long  &alBytesRead ,HANDLE& hEventToReset);
	bool		Read_Available( std::string &szData,HANDLE & hEventToReset);
	inline long GetSize() {return m_szInternalBuffer.size();}
	inline bool IsEmpty() {return m_szInternalBuffer.size() == 0; }

	bool Read_Upto_FIX( std::string &szData,char chTerm,long  &alBytesRead,HANDLE & hEventToReset);
};

#endif // !defined(AFX_SerialBuffer_H__FD164A5F_9F09_451B_8E42_180999B4DB9A__INCLUDED_)