Refactored duplicated code #4601

src/lib/client/ServerProxy.cpp

@@ -556,38 +556,18 @@ ServerProxy::setClipboard()
 {
 	// parse
 	static String dataCached;
-	static size_t expectedSize;
 	ClipboardID id;
-	UInt32 seqNum;
+	UInt32 seq;
-	size_t mark = 0;
-	String data;
-	ProtocolUtil::readf(m_stream, kMsgDClipboard + 4, &id, &seqNum, &mark, &data);
 	
-	if (mark == kDataStart) {
+	int r = ClipboardChunk::assemble(m_stream, dataCached, id, seq);
-		expectedSize = synergy::string::stringToSizeType(data);
+
-		LOG((CLOG_DEBUG "start receiving clipboard data"));
+	if (r == kFinish) {
-		dataCached.clear();
-	}
-	else if (mark == kDataChunk) {
-		dataCached.append(data);
-	}
-	else if (mark == kDataEnd) {
 		LOG((CLOG_DEBUG "received clipboard %d size=%d", id, dataCached.size()));
 		
-		// validate
-		if (id >= kClipboardEnd) {
-			return;
-		}
-		else if (expectedSize != dataCached.size()) {
-			LOG((CLOG_ERR "corrupted clipboard data, expected size=%d actual size=%d", expectedSize, dataCached.size()));
-			return;
-		}
-
 		// forward
 		Clipboard clipboard;
 		clipboard.unmarshall(dataCached, 0);
 		m_client->setClipboard(id, &clipboard);
-		expectedSize = 0;
 	}
 }
 

src/lib/server/ClientProxy1_6.cpp

@@ -100,44 +100,21 @@ ClientProxy1_6::recvClipboard()
 {
 	// parse message
 	static String dataCached;
-	static size_t expectedSize;
 	ClipboardID id;
-	UInt8 mark;
+	UInt32 seq;
-	UInt32 seqNum;
-	String data;
-	if (!ProtocolUtil::readf(getStream(),
-							 kMsgDClipboard + 4, &id, &seqNum, &mark, &data)) {
-		return false;
-	}
 
-	if (mark == kDataStart) {
+	int r = ClipboardChunk::assemble(getStream(), dataCached, id, seq);
-		expectedSize = synergy::string::stringToSizeType(data);
-		LOG((CLOG_DEBUG "start receiving clipboard data"));
-		dataCached.clear();
-	}
-	else if (mark == kDataChunk) {
-		dataCached.append(data);
-	}
-	else if (mark == kDataEnd) {
-		LOG((CLOG_DEBUG "received client \"%s\" clipboard %d seqnum=%d, size=%d", getName().c_str(), id, seqNum, dataCached.size()));
-		
-		// validate
-		if (id >= kClipboardEnd) {
-			return false;
-		}
-		else if (expectedSize != dataCached.size()) {
-			LOG((CLOG_ERR "corrupted clipboard data, expected size=%d actual size=%d", expectedSize, dataCached.size()));
-			return false;
-		}
 
+	if (r == kFinish) {
+		LOG((CLOG_DEBUG "received client \"%s\" clipboard %d seqnum=%d, size=%d", getName().c_str(), id, seq, dataCached.size()));
 		// save clipboard
 		m_clipboard[id].m_clipboard.unmarshall(dataCached, 0);
-		m_clipboard[id].m_sequenceNumber = seqNum;
+		m_clipboard[id].m_sequenceNumber = seq;
 		
 		// notify
 		ClipboardInfo* info = new ClipboardInfo;
 		info->m_id = id;
-		info->m_sequenceNumber = seqNum;
+		info->m_sequenceNumber = seq;
 		m_events->addEvent(Event(m_events->forClipboard().clipboardChanged(),
 								 getEventTarget(), info));
 	}

src/lib/synergy/ClipboardChunk.cpp

@@ -17,7 +17,10 @@
 
 #include "synergy/ClipboardChunk.h"
 
+#include "synergy/ProtocolUtil.h"
 #include "synergy/protocol_types.h"
+#include "io/IStream.h"
+#include "base/Log.h"
 
 ClipboardChunk::ClipboardChunk(size_t size) :
 	Chunk(size)
@@ -79,3 +82,42 @@ ClipboardChunk::end(ClipboardID id, UInt32 sequence)
 
 	return end;
 }
+
+int
+ClipboardChunk::assemble(synergy::IStream* stream,
+					String& dataCached,
+					ClipboardID& id,
+					UInt32& sequence)
+{
+	static size_t expectedSize;
+	UInt8 mark;
+	String data;
+
+	if (!ProtocolUtil::readf(stream, kMsgDClipboard + 4, &id, &sequence, &mark, &data)) {
+		return kError;
+	}
+	
+	if (mark == kDataStart) {
+		expectedSize = synergy::string::stringToSizeType(data);
+		LOG((CLOG_DEBUG "start receiving clipboard data"));
+		dataCached.clear();
+		return kNotFinish;
+	}
+	else if (mark == kDataChunk) {
+		dataCached.append(data);
+		return kNotFinish;
+	}
+	else if (mark == kDataEnd) {
+		// validate
+		if (id >= kClipboardEnd) {
+			return kError;
+		}
+		else if (expectedSize != dataCached.size()) {
+			LOG((CLOG_ERR "corrupted clipboard data, expected size=%d actual size=%d", expectedSize, dataCached.size()));
+			return kError;
+		}
+		return kFinish;
+	}
+
+	return kError;
+}

src/lib/synergy/ClipboardChunk.h

@@ -24,6 +24,16 @@
 
 #define CLIPBOARD_CHUNK_META_SIZE 7
 
+enum EAssembleResult {
+	kNotFinish,
+	kFinish,
+	kError
+};
+
+namespace synergy {
+class IStream;
+};
+
 class ClipboardChunk : public Chunk {
 public:
 	ClipboardChunk(size_t size);
@@ -40,4 +50,10 @@ public:
 							const String& data);
 	static ClipboardChunk*
 						end(ClipboardID id, UInt32 sequence);
+
+	static int			assemble(
+							synergy::IStream* stream,
+							String& dataCached,
+							ClipboardID& id,
+							UInt32& sequence);
 };