C++ CBuffer::ToString方法代码示例

void CNetDDESvrApp::OnAdvise(CDDELink* pLink, const CDDEData* pData)
{
	ASSERT(pData != NULL);

	// Ignore Advise, if during an Advise Start.
	if (pLink == NULL)
		return;

	CDDEConv* pConv = pLink->Conversation();
	CBuffer   oData = pData->GetBuffer();

	// Find the links' value in the cache.
	CLinkValue* pValue = m_oLinkCache.Find(pConv, pLink);

	// Discard duplicate updates.
	if ((App.m_bDiscardDups) && (pValue != NULL)
	 && (pValue->m_oLastValue == oData))
	{
		if (App.m_bTraceUpdates)
			App.Trace(TXT("DDE_ADVISE: %s %s (ignored)"), pConv->Service(), pLink->Item());

		return;
	}

	// Create a cache entry, if a new link.
	if (pValue == NULL)
		pValue = m_oLinkCache.Create(pConv, pLink);

	ASSERT(pValue != NULL);

	// Update links' cached value.
	pValue->m_oLastValue  = oData;
	pValue->m_tLastUpdate = CDateTime::Current();

	// Create advise packet.
	HCONV      hConv = pConv->Handle();
	CBuffer    oBuffer;
	CMemStream oStream(oBuffer);

	oStream.Create();

	oStream.Write(&hConv, sizeof(hConv));
	oStream << pLink->Item();
	oStream << (uint32) pLink->Format();
	oStream << oData;
	oStream << true;

	oStream.Close();

	CNetDDEPacket oPacket(CNetDDEPacket::DDE_ADVISE, oBuffer);

	// Notify all NetDDEClients...
	for (size_t i = 0; i < m_aoConnections.Size(); ++i)
	{
		CNetDDESvrSocket* pConnection = m_aoConnections[i];

		// Ignore, if connection severed.
		if (!pConnection->IsOpen())
			continue;

		// Connection references link?
		if (pConnection->IsLinkUsed(pLink))
		{
			try
			{
				if (App.m_bTraceUpdates)
				{
					uint    nFormat = pLink->Format();
					CString strData;

					if (nFormat == CF_TEXT)
						strData = oData.ToString(ANSI_TEXT);
					else if (nFormat == CF_UNICODETEXT)
						strData = oData.ToString(UNICODE_TEXT);
					else
						strData = CClipboard::FormatName(nFormat);

					App.Trace(TXT("DDE_ADVISE: %s %s [%s]"), pConv->Service(), pLink->Item(), strData);
				}

				// Send advise message.
				pConnection->SendPacket(oPacket);

				// Update stats.
				++m_nPktsSent;
			}
			catch (CSocketException& e)
			{
				App.Trace(TXT("SOCKET_ERROR: %s"), e.twhat());
			}
		}
	}
}

void CNetDDESvrApp::OnDDEPoke(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
	ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_POKE);

	bool     bResult = false;

	HCONV	 hConv;
	uint32   nConvID;
	CString  strItem;
	uint32   nFormat;
	CBuffer  oData;

	// Decode message.
	CMemStream oStream(oReqPacket.Buffer());

	oStream.Open();
	oStream.Seek(sizeof(CNetDDEPacket::Header));

	oStream.Read(&hConv, sizeof(hConv));
	oStream >> nConvID;
	oStream >> strItem;
	oStream >> nFormat;
	oStream >> oData;

	oStream.Close();

	if (App.m_bTraceRequests)
	{
		CString strData;

		if (nFormat == CF_TEXT)
			strData = oData.ToString(ANSI_TEXT);
		else if (nFormat == CF_UNICODETEXT)
			strData = oData.ToString(UNICODE_TEXT);
		else
			strData = CClipboard::FormatName(nFormat);

		App.Trace(TXT("DDE_POKE: %s %s [%s]"), strItem, CClipboard::FormatName(nFormat), strData);
	}

	try
	{
		// Locate the conversation.
		CDDECltConv* pConv = m_pDDEClient->FindConversation(hConv);

		if (pConv != NULL)
		{
			// Call DDE to do the poke.
			pConv->Poke(strItem, nFormat, oData.Buffer(), oData.Size());

			bResult = true;
		}
	}
	catch (CDDEException& e)
	{
		App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
	}

	// Create response message.
	CBuffer    oRspBuffer;
	CMemStream oRspStream(oRspBuffer);

	oRspStream.Create();

	oRspStream << bResult;

	oRspStream.Close();

	// Send response message.
	CNetDDEPacket oRspPacket(CNetDDEPacket::DDE_POKE, oReqPacket.PacketID(), oRspBuffer);

	oConnection.SendPacket(oRspPacket);

	// Update stats.
	++m_nPktsSent;
}