myframe.cpp

一个通讯管理机的源代码。比较好用。推荐

#include "myframe.h"

CMyFrame::CMyFrame(void)
{
}

CMyFrame::~CMyFrame(void)
{
}

bool CMyFrame::FrameToBuffer(CDataNode &dn)
{
	bool bRet = false;
	if(m_bIsSetup) 
	{ 
		dn.SetSize(GetSize());
		WORD wDataSize = GetDataSize();
	
		WORD* pw = (WORD *)dn.m_pbyData;
		*pw++ = 0xeb90;
		*pw++ = 0xeb90;
		*pw++ = wDataSize + 1;//data length + cid
		BYTE* pbyTemp = (BYTE *)pw;
		*pbyTemp++ = m_byCID;

		if (wDataSize)
			memcpy(pbyTemp,m_pData,wDataSize);

		pbyTemp += wDataSize;
		*pbyTemp = 0x16;//tail
		bRet = true;
	} 
	return bRet;
}

void CMyFrame::SetupFrame(CFrameNode *pFNSend)
{
	if (pFNSend->m_pbyData && pFNSend->m_wSize)
	{
		m_wLength = pFNSend->m_wSize;
		memcpy(m_pData,pFNSend->m_pbyData,pFNSend->m_wSize);
	}
	else m_wLength = 0;
	m_byCID = pFNSend->m_byCID;
	m_bIsSetup = true;
}

void CMyFrame::FrameToBuf(CFrameNode& fn)
{
	fn.m_byCID = m_byCID;
	if (m_wLength)
	{
		fn.SetSize(m_wLength);
		memcpy(fn.m_pbyData,m_pData,m_wLength);
	}
}

bool CMyFrame::BufferToFrame(CDQue* pPhyDQ)
{
	Reset();
	CDataNode *pDN = NULL;
	bool bRet = false;
	while (pPhyDQ->Get(pDN) && pDN)
	{
		if (m_wInLength + pDN->m_wSize > 1008){ delete pDN; break;}
		memcpy(&m_pbyInBuf[m_wInLength],pDN->m_pbyData,pDN->m_wSize);
		m_wInLength += pDN->m_wSize;
//		TRACE("<%02x> ",pDN->m_pbyData[0]);
		delete pDN;

		if (m_wInLength>=8)
		{
			WORD* pw = (WORD *)&m_pbyInBuf[0];
			if ((*pw++ != 0xeb90) || (*pw++ != 0xeb90))
				break;
			else if ((*pw + 7) == m_wInLength) 
			{
				BYTE* pby = &m_pbyInBuf[m_wInLength-1];	
				if (*pby == 0x16)
					bRet = true;
				break;
			}
		}
	}

	if (bRet)
	{
		WORD* pwTemp = (WORD *)m_pbyInBuf;
		pwTemp +=2;
		m_wLength = *pwTemp++ - 1;
		BYTE* pTemp = (BYTE *)pwTemp;
		m_byCID = *pTemp++;	
		if (m_wLength)
			memcpy(m_pData,pTemp,m_wLength);
	}
	return bRet;
}