Improved command blocks

* Their command and previous output are displayed on the client
* They have a BlockHandler implementation, so you can't place blocks on
them anymore
+ As a side effect, implemented UpdateBlockEntity

src/Protocol/Protocol.h

@@ -12,6 +12,7 @@
 
 #include "../Defines.h"
 #include "../Endianness.h"
+#include "../WorldStorage/FastNBT.h"
 
 
 
@@ -103,6 +104,7 @@ public:
 	virtual void SendThunderbolt         (int a_BlockX, int a_BlockY, int a_BlockZ) = 0;
 	virtual void SendTimeUpdate          (Int64 a_WorldAge, Int64 a_TimeOfDay) = 0;
 	virtual void SendUnloadChunk         (int a_ChunkX, int a_ChunkZ) = 0;
+	virtual void SendUpdateBlockEntity   (int a_BlockX, int a_BlockY, int a_BlockZ, Byte a_Action, cFastNBTWriter & a_NBT) = 0;
 	virtual void SendUpdateSign          (int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4) = 0;
 	virtual void SendUseBed              (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ ) = 0;
 	virtual void SendWeather             (eWeather a_Weather) = 0;

src/Protocol/Protocol125.h

@@ -79,6 +79,7 @@ public:
 	virtual void SendThunderbolt         (int a_BlockX, int a_BlockY, int a_BlockZ) override;
 	virtual void SendTimeUpdate          (Int64 a_WorldAge, Int64 a_TimeOfDay) override;
 	virtual void SendUnloadChunk         (int a_ChunkX, int a_ChunkZ) override;
+	virtual void SendUpdateBlockEntity   (int a_BlockX, int a_BlockY, int a_BlockZ, Byte a_Action, cFastNBTWriter & a_NBT) override {};
 	virtual void SendUpdateSign          (int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4) override;
 	virtual void SendUseBed              (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ ) override;
 	virtual void SendWeather             (eWeather a_Weather) override;

src/Protocol/Protocol17x.cpp

@@ -892,6 +892,20 @@ void cProtocol172::SendUnloadChunk(int a_ChunkX, int a_ChunkZ)
 
 
 
+void cProtocol172::SendUpdateBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, Byte a_Action, cFastNBTWriter & a_NBT)
+{
+	cPacketizer Pkt(*this, 0x35);  // Update tile entity packet
+	Pkt.WriteInt(a_BlockX);
+	Pkt.WriteShort(a_BlockY);
+	Pkt.WriteInt(a_BlockZ);
+	Pkt.WriteByte(a_Action);
+
+	Pkt.WriteBlockEntity(a_NBT);
+}
+
+
+
+
 
 void cProtocol172::SendUpdateSign(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4)
 {
@@ -1819,6 +1833,17 @@ void cProtocol172::cPacketizer::WriteItem(const cItem & a_Item)
 
 
 
+void cProtocol172::cPacketizer::WriteBlockEntity(const cFastNBTWriter & a_NBT)
+{
+	AString Compressed;
+	CompressStringGZIP(a_NBT.GetResult().data(), a_NBT.GetResult().size(), Compressed);
+	WriteShort(Compressed.size());
+	WriteBuf(Compressed.data(), Compressed.size());
+}
+
+
+
+
 
 void cProtocol172::cPacketizer::WriteByteAngle(double a_Angle)
 {

src/Protocol/Protocol17x.h

@@ -102,6 +102,7 @@ public:
 	virtual void SendThunderbolt         (int a_BlockX, int a_BlockY, int a_BlockZ) override;
 	virtual void SendTimeUpdate          (Int64 a_WorldAge, Int64 a_TimeOfDay) override;
 	virtual void SendUnloadChunk         (int a_ChunkX, int a_ChunkZ) override;
+	virtual void SendUpdateBlockEntity   (int a_BlockX, int a_BlockY, int a_BlockZ, Byte a_Action, cFastNBTWriter & a_NBT) override;
 	virtual void SendUpdateSign          (int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4) override;
 	virtual void SendUseBed              (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ ) override;
 	virtual void SendWeather             (eWeather a_Weather) override;
@@ -189,6 +190,7 @@ protected:
 		void WriteEntityMetadata(const cEntity & a_Entity);  // Writes the metadata for the specified entity, not including the terminating 0x7f
 		void WriteMobMetadata(const cMonster & a_Mob);  // Writes the mob-specific metadata for the specified mob
 		void WriteEntityProperties(const cEntity & a_Entity);  // Writes the entity properties for the specified entity, including the Count field
+		void WriteBlockEntity(const cFastNBTWriter & a_NBT);
 		
 	protected:
 		cProtocol172 & m_Protocol;

src/Protocol/ProtocolRecognizer.cpp

@@ -636,6 +636,16 @@ void cProtocolRecognizer::SendUnloadChunk(int a_ChunkX, int a_ChunkZ)
 
 
 
+void cProtocolRecognizer::SendUpdateBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, Byte a_Action, cFastNBTWriter & a_NBT)
+{
+	ASSERT(m_Protocol != NULL);
+	m_Protocol->SendUpdateBlockEntity(a_BlockX, a_BlockY, a_BlockZ, a_Action, a_NBT);
+}
+
+
+
+
+
 void cProtocolRecognizer::SendUpdateSign(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4)
 {
 	ASSERT(m_Protocol != NULL);

src/Protocol/ProtocolRecognizer.h

@@ -12,6 +12,7 @@
 
 #include "Protocol.h"
 #include "../ByteBuffer.h"
+#include "../WorldStorage/FastNBT.h"
 
 
 
@@ -114,6 +115,7 @@ public:
 	virtual void SendThunderbolt         (int a_BlockX, int a_BlockY, int a_BlockZ) override;
 	virtual void SendTimeUpdate          (Int64 a_WorldAge, Int64 a_TimeOfDay) override;
 	virtual void SendUnloadChunk         (int a_ChunkX, int a_ChunkZ) override;
+	virtual void SendUpdateBlockEntity   (int a_BlockX, int a_BlockY, int a_BlockZ, Byte a_Action, cFastNBTWriter & a_NBT) override;
 	virtual void SendUpdateSign          (int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4) override;
 	virtual void SendUseBed              (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ ) override;
 	virtual void SendWeather             (eWeather a_Weather) override;