20 files changed, 593 insertions, 62 deletions

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 150bcf09e..b15a36a38 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -20,5 +20,6 @@ worktycho
 Sxw1212
 tonibm19
 Diusrex
+structinf (xdot)
 
 Please add yourself to this list if you contribute to MCServer.
diff --git a/src/Bindings/ManualBindings.cpp b/src/Bindings/ManualBindings.cpp
index ebee2d697..3ebe7b294 100644
--- a/src/Bindings/ManualBindings.cpp
+++ b/src/Bindings/ManualBindings.cpp
@@ -14,6 +14,7 @@
 #include "../WebAdmin.h"
 #include "../ClientHandle.h"
 #include "../BlockEntities/ChestEntity.h"
+#include "../BlockEntities/CommandBlockEntity.h"
 #include "../BlockEntities/DispenserEntity.h"
 #include "../BlockEntities/DropperEntity.h"
 #include "../BlockEntities/FurnaceEntity.h"
@@ -2265,16 +2266,17 @@ void ManualBindings::Bind(lua_State * tolua_S)
 		tolua_endmodule(tolua_S);
 		
 		tolua_beginmodule(tolua_S, "cWorld");
-			tolua_function(tolua_S, "DoWithBlockEntityAt",       tolua_DoWithXYZ<cWorld, cBlockEntity,       &cWorld::DoWithBlockEntityAt>);
-			tolua_function(tolua_S, "DoWithChestAt",             tolua_DoWithXYZ<cWorld, cChestEntity,       &cWorld::DoWithChestAt>);
-			tolua_function(tolua_S, "DoWithDispenserAt",         tolua_DoWithXYZ<cWorld, cDispenserEntity,   &cWorld::DoWithDispenserAt>);
-			tolua_function(tolua_S, "DoWithDropSpenserAt",       tolua_DoWithXYZ<cWorld, cDropSpenserEntity, &cWorld::DoWithDropSpenserAt>);
-			tolua_function(tolua_S, "DoWithDropperAt",           tolua_DoWithXYZ<cWorld, cDropperEntity,     &cWorld::DoWithDropperAt>);
-			tolua_function(tolua_S, "DoWithEntityByID",          tolua_DoWithID< cWorld, cEntity,            &cWorld::DoWithEntityByID>);
-			tolua_function(tolua_S, "DoWithFurnaceAt",           tolua_DoWithXYZ<cWorld, cFurnaceEntity,     &cWorld::DoWithFurnaceAt>);
-			tolua_function(tolua_S, "DoWithNoteBlockAt",         tolua_DoWithXYZ<cWorld, cNoteEntity,        &cWorld::DoWithNoteBlockAt>);
-			tolua_function(tolua_S, "DoWithPlayer",              tolua_DoWith<   cWorld, cPlayer,            &cWorld::DoWithPlayer>);
-			tolua_function(tolua_S, "FindAndDoWithPlayer",       tolua_DoWith<   cWorld, cPlayer,            &cWorld::FindAndDoWithPlayer>);
+			tolua_function(tolua_S, "DoWithBlockEntityAt",       tolua_DoWithXYZ<cWorld, cBlockEntity,        &cWorld::DoWithBlockEntityAt>);
+			tolua_function(tolua_S, "DoWithChestAt",             tolua_DoWithXYZ<cWorld, cChestEntity,        &cWorld::DoWithChestAt>);
+			tolua_function(tolua_S, "DoWithDispenserAt",         tolua_DoWithXYZ<cWorld, cDispenserEntity,    &cWorld::DoWithDispenserAt>);
+			tolua_function(tolua_S, "DoWithDropSpenserAt",       tolua_DoWithXYZ<cWorld, cDropSpenserEntity,  &cWorld::DoWithDropSpenserAt>);
+			tolua_function(tolua_S, "DoWithDropperAt",           tolua_DoWithXYZ<cWorld, cDropperEntity,      &cWorld::DoWithDropperAt>);
+			tolua_function(tolua_S, "DoWithEntityByID",          tolua_DoWithID< cWorld, cEntity,             &cWorld::DoWithEntityByID>);
+			tolua_function(tolua_S, "DoWithFurnaceAt",           tolua_DoWithXYZ<cWorld, cFurnaceEntity,      &cWorld::DoWithFurnaceAt>);
+			tolua_function(tolua_S, "DoWithNoteBlockAt",         tolua_DoWithXYZ<cWorld, cNoteEntity,         &cWorld::DoWithNoteBlockAt>);
+			tolua_function(tolua_S, "DoWithCommandBlockAt",      tolua_DoWithXYZ<cWorld, cCommandBlockEntity, &cWorld::DoWithCommandBlockAt>);
+			tolua_function(tolua_S, "DoWithPlayer",              tolua_DoWith<   cWorld, cPlayer,             &cWorld::DoWithPlayer>);
+			tolua_function(tolua_S, "FindAndDoWithPlayer",       tolua_DoWith<   cWorld, cPlayer,             &cWorld::FindAndDoWithPlayer>);
 			tolua_function(tolua_S, "ForEachBlockEntityInChunk", tolua_ForEachInChunk<cWorld, cBlockEntity,   &cWorld::ForEachBlockEntityInChunk>);
 			tolua_function(tolua_S, "ForEachChestInChunk",       tolua_ForEachInChunk<cWorld, cChestEntity,   &cWorld::ForEachChestInChunk>);
 			tolua_function(tolua_S, "ForEachEntity",             tolua_ForEach<       cWorld, cEntity,        &cWorld::ForEachEntity>);
diff --git a/src/BlockEntities/BlockEntity.cpp b/src/BlockEntities/BlockEntity.cpp
index 5d7e4a37a..97b5c1a66 100644
--- a/src/BlockEntities/BlockEntity.cpp
+++ b/src/BlockEntities/BlockEntity.cpp
@@ -6,6 +6,7 @@
 #include "Globals.h"
 #include "BlockEntity.h"
 #include "ChestEntity.h"
+#include "CommandBlockEntity.h"
 #include "DispenserEntity.h"
 #include "DropperEntity.h"
 #include "EnderChestEntity.h"
@@ -23,17 +24,18 @@ cBlockEntity * cBlockEntity::CreateByBlockType(BLOCKTYPE a_BlockType, NIBBLETYPE
 {
 	switch (a_BlockType)
 	{
-		case E_BLOCK_CHEST:       return new cChestEntity      (a_BlockX, a_BlockY, a_BlockZ, a_World);
-		case E_BLOCK_DISPENSER:   return new cDispenserEntity  (a_BlockX, a_BlockY, a_BlockZ, a_World);
-		case E_BLOCK_DROPPER:     return new cDropperEntity    (a_BlockX, a_BlockY, a_BlockZ, a_World);
-		case E_BLOCK_ENDER_CHEST: return new cEnderChestEntity (a_BlockX, a_BlockY, a_BlockZ, a_World);
-		case E_BLOCK_LIT_FURNACE: return new cFurnaceEntity    (a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, a_World);
-		case E_BLOCK_FURNACE:     return new cFurnaceEntity    (a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, a_World);
-		case E_BLOCK_HOPPER:      return new cHopperEntity     (a_BlockX, a_BlockY, a_BlockZ, a_World);
-		case E_BLOCK_SIGN_POST:   return new cSignEntity       (a_BlockType, a_BlockX, a_BlockY, a_BlockZ, a_World);
-		case E_BLOCK_WALLSIGN:    return new cSignEntity       (a_BlockType, a_BlockX, a_BlockY, a_BlockZ, a_World);
-		case E_BLOCK_NOTE_BLOCK:  return new cNoteEntity       (a_BlockX, a_BlockY, a_BlockZ, a_World);
-		case E_BLOCK_JUKEBOX:     return new cJukeboxEntity    (a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_CHEST:         return new cChestEntity       (a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_COMMAND_BLOCK: return new cCommandBlockEntity(a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_DISPENSER:     return new cDispenserEntity   (a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_DROPPER:       return new cDropperEntity     (a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_ENDER_CHEST:   return new cEnderChestEntity  (a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_LIT_FURNACE:   return new cFurnaceEntity     (a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, a_World);
+		case E_BLOCK_FURNACE:       return new cFurnaceEntity     (a_BlockX, a_BlockY, a_BlockZ, a_BlockType, a_BlockMeta, a_World);
+		case E_BLOCK_HOPPER:        return new cHopperEntity      (a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_SIGN_POST:     return new cSignEntity        (a_BlockType, a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_WALLSIGN:      return new cSignEntity        (a_BlockType, a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_NOTE_BLOCK:    return new cNoteEntity        (a_BlockX, a_BlockY, a_BlockZ, a_World);
+		case E_BLOCK_JUKEBOX:       return new cJukeboxEntity     (a_BlockX, a_BlockY, a_BlockZ, a_World);
 	}
 	LOGD("%s: Requesting creation of an unknown block entity - block type %d (%s)",
 		__FUNCTION__, a_BlockType, ItemTypeToString(a_BlockType).c_str()
diff --git a/src/BlockEntities/CommandBlockEntity.cpp b/src/BlockEntities/CommandBlockEntity.cpp
new file mode 100644
index 000000000..543d47b7a
--- /dev/null
+++ b/src/BlockEntities/CommandBlockEntity.cpp
@@ -0,0 +1,197 @@
+
+// CommandBlockEntity.cpp
+
+// Implements the cCommandBlockEntity class representing a single command block in the world
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+#include "json/json.h"
+#include "CommandBlockEntity.h"
+#include "../Entities/Player.h"
+
+#include "CommandOutput.h"
+#include "Root.h"
+#include "Server.h" // ExecuteConsoleCommand()
+
+
+
+
+
+cCommandBlockEntity::cCommandBlockEntity(int a_X, int a_Y, int a_Z, cWorld * a_World) :
+	super(E_BLOCK_COMMAND_BLOCK, a_X, a_Y, a_Z, a_World),
+	m_ShouldExecute(false),
+	m_IsPowered(false)
+{}
+
+
+
+
+
+
+void cCommandBlockEntity::UsedBy(cPlayer * a_Player)
+{
+	// Nothing to do
+	UNUSED(a_Player);
+}
+
+
+
+
+
+void cCommandBlockEntity::SetCommand(const AString & a_Cmd)
+{
+	m_Command = a_Cmd;
+}
+
+
+
+
+
+void cCommandBlockEntity::SetLastOutput(const AString & a_LastOut)
+{
+	m_LastOutput = a_LastOut;
+}
+
+
+
+
+
+void cCommandBlockEntity::SetResult(const NIBBLETYPE a_Result)
+{
+	m_Result = a_Result;
+}
+
+
+
+
+
+const AString & cCommandBlockEntity::GetCommand(void) const
+{
+	return m_Command;
+}
+
+
+
+
+
+const AString & cCommandBlockEntity::GetLastOutput(void) const
+{
+	return m_LastOutput;
+}
+
+
+
+
+
+NIBBLETYPE cCommandBlockEntity::GetResult(void) const
+{
+	return m_Result;
+}
+
+
+
+
+
+void cCommandBlockEntity::Activate(void)
+{
+	m_ShouldExecute = true;
+}
+
+
+
+
+
+void cCommandBlockEntity::SetRedstonePower(bool a_IsPowered)
+{
+	if (a_IsPowered && !m_IsPowered)
+	{
+		Activate();
+	}
+	m_IsPowered = a_IsPowered;
+}
+
+
+
+
+
+bool cCommandBlockEntity::Tick(float a_Dt, cChunk & a_Chunk)
+{
+	if (!m_ShouldExecute)
+	{
+		return false;
+	}
+	
+	m_ShouldExecute = false;
+	Execute();
+	return true;
+}
+
+
+
+
+
+void cCommandBlockEntity::SendTo(cClientHandle & a_Client)
+{
+	// Nothing needs to be sent
+	UNUSED(a_Client);
+}
+
+
+
+
+
+bool cCommandBlockEntity::LoadFromJson(const Json::Value & a_Value)
+{
+	m_Command = a_Value.get("Command", "").asString();
+
+	m_LastOutput = a_Value.get("LastOutput", "").asString();
+
+	return true;
+}
+
+
+
+
+
+void cCommandBlockEntity::SaveToJson(Json::Value & a_Value)
+{
+	a_Value["Command"] = m_Command;
+
+	a_Value["LastOutput"] = m_LastOutput;
+}
+
+
+
+
+
+void cCommandBlockEntity::Execute()
+{
+	class CommandBlockOutCb :
+		public cCommandOutputCallback
+	{
+		cCommandBlockEntity* m_CmdBlock;
+
+	public:
+		CommandBlockOutCb(cCommandBlockEntity* a_CmdBlock) : m_CmdBlock(a_CmdBlock) {}
+
+		virtual void Out(const AString & a_Text)
+		{
+			ASSERT(m_CmdBlock != NULL);
+
+			// Overwrite field
+			m_CmdBlock->SetLastOutput(a_Text);
+		}
+	} CmdBlockOutCb(this);
+
+	LOGD("cCommandBlockEntity: Executing command %s", m_Command.c_str());
+
+	cServer* Server = cRoot::Get()->GetServer();
+
+	Server->ExecuteConsoleCommand(m_Command, CmdBlockOutCb);
+
+	// TODO 2014-01-18 xdot: Update the signal strength.
+	m_Result = 0;
+}
+
+
+
+
diff --git a/src/BlockEntities/CommandBlockEntity.h b/src/BlockEntities/CommandBlockEntity.h
new file mode 100644
index 000000000..12157670f
--- /dev/null
+++ b/src/BlockEntities/CommandBlockEntity.h
@@ -0,0 +1,91 @@
+
+// CommandBlockEntity.h
+
+// Declares the cCommandBlockEntity class representing a single command block in the world
+
+
+
+
+
+#pragma once
+
+#include "BlockEntity.h"
+
+
+
+
+
+namespace Json
+{
+	class Value;
+}
+
+
+
+
+
+// tolua_begin
+
+class cCommandBlockEntity : 
+	public cBlockEntity
+{
+	typedef cBlockEntity super;
+	
+public:
+
+	// tolua_end
+	
+	/// Creates a new empty command block entity
+	cCommandBlockEntity(int a_X, int a_Y, int a_Z, cWorld * a_World);
+
+	bool LoadFromJson( const Json::Value& a_Value );
+	virtual void SaveToJson(Json::Value& a_Value ) override;
+
+	virtual bool Tick(float a_Dt, cChunk & a_Chunk) override;
+	virtual void SendTo(cClientHandle & a_Client) override;
+	virtual void UsedBy(cPlayer * a_Player) override;
+
+	void SetLastOutput(const AString & a_LastOut);
+
+	void SetResult(const NIBBLETYPE a_Result);
+
+	// tolua_begin
+
+	/// Sets the internal redstone power flag to "on" or "off", depending on the parameter. Calls Activate() if appropriate
+	void SetRedstonePower(bool a_IsPowered);
+
+	/// Sets the command block to execute a command in the next tick
+	void Activate(void);
+	
+	/// Sets the command
+	void SetCommand(const AString & a_Cmd);
+
+	/// Retrieves stored command
+	const AString & GetCommand(void) const;
+
+	/// Retrieves the last line of output generated by the command block
+	const AString & GetLastOutput(void) const;
+
+	/// Retrieves the result (signal strength) of the last operation
+	NIBBLETYPE GetResult(void) const;
+	
+	// tolua_end
+	
+private:
+
+	/// Executes the associated command
+	void Execute();
+
+	bool m_ShouldExecute;
+	bool m_IsPowered;
+
+	AString m_Command;
+
+	AString m_LastOutput;
+
+	NIBBLETYPE m_Result;
+} ;  // tolua_export
+
+
+
+
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index 0735c8144..a72464ec3 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -1298,6 +1298,7 @@ void cChunk::CreateBlockEntities(void)
 				switch (BlockType)
 				{
 					case E_BLOCK_CHEST:
+					case E_BLOCK_COMMAND_BLOCK:
 					case E_BLOCK_DISPENSER:
 					case E_BLOCK_DROPPER:
 					case E_BLOCK_ENDER_CHEST:
@@ -1425,6 +1426,7 @@ void cChunk::SetBlock(int a_RelX, int a_RelY, int a_RelZ, BLOCKTYPE a_BlockType,
 	switch (a_BlockType)
 	{
 		case E_BLOCK_CHEST:
+		case E_BLOCK_COMMAND_BLOCK:
 		case E_BLOCK_DISPENSER:
 		case E_BLOCK_DROPPER:
 		case E_BLOCK_ENDER_CHEST:
@@ -2268,6 +2270,38 @@ bool cChunk::DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNoteBl
 
 
 
+bool cChunk::DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCommandBlockCallback & a_Callback)
+{
+	// The blockentity list is locked by the parent chunkmap's CS
+	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(), itr2 = itr; itr != m_BlockEntities.end(); itr = itr2)
+	{
+		++itr2;
+		if (((*itr)->GetPosX() != a_BlockX) || ((*itr)->GetPosY() != a_BlockY) || ((*itr)->GetPosZ() != a_BlockZ))
+		{
+			continue;
+		}
+		if ((*itr)->GetBlockType() != E_BLOCK_COMMAND_BLOCK)
+		{
+			// There is a block entity here, but of different type. No other block entity can be here, so we can safely bail out
+			return false;
+		}
+		
+		// The correct block entity is here, 
+		if (a_Callback.Item((cCommandBlockEntity *)*itr))
+		{
+			return false;
+		}
+		return true;
+	}  // for itr - m_BlockEntitites[]
+	
+	// Not found:
+	return false;
+}
+
+
+
+
+
 bool cChunk::GetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4)
 {
 	// The blockentity list is locked by the parent chunkmap's CS
diff --git a/src/Chunk.h b/src/Chunk.h
index f0a50c3c4..4ac38c46c 100644
--- a/src/Chunk.h
+++ b/src/Chunk.h
@@ -40,12 +40,13 @@ class cFluidSimulatorData;
 class cMobCensus;
 class cMobSpawner;
 
-typedef std::list<cClientHandle *>      cClientHandleList;
-typedef cItemCallback<cEntity>          cEntityCallback;
-typedef cItemCallback<cChestEntity>     cChestCallback;
-typedef cItemCallback<cDispenserEntity> cDispenserCallback;
-typedef cItemCallback<cFurnaceEntity>   cFurnaceCallback;
-typedef cItemCallback<cNoteEntity>      cNoteBlockCallback;
+typedef std::list<cClientHandle *>         cClientHandleList;
+typedef cItemCallback<cEntity>             cEntityCallback;
+typedef cItemCallback<cChestEntity>        cChestCallback;
+typedef cItemCallback<cDispenserEntity>    cDispenserCallback;
+typedef cItemCallback<cFurnaceEntity>      cFurnaceCallback;
+typedef cItemCallback<cNoteEntity>         cNoteBlockCallback;
+typedef cItemCallback<cCommandBlockEntity> cCommandBlockCallback;
 
 
 
@@ -237,6 +238,9 @@ public:
 	/// Calls the callback for the noteblock at the specified coords; returns false if there's no noteblock at those coords or callback returns true, returns true if found
 	bool DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNoteBlockCallback & a_Callback);
 
+	/// Calls the callback for the command block at the specified coords; returns false if there's no command block at those coords or callback returns true, returns true if found
+	bool DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCommandBlockCallback & a_Callback); 
+
 	/// Retrieves the test on the sign at the specified coords; returns false if there's no sign at those coords, true if found
 	bool GetSignLines (int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4);  // Lua-accessible
 
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index e14090b18..5797eb453 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -1968,6 +1968,23 @@ bool cChunkMap::DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNot
 
 
 
+bool cChunkMap::DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCommandBlockCallback & a_Callback)
+{
+	int ChunkX, ChunkZ;
+	int BlockX = a_BlockX, BlockY = a_BlockY, BlockZ = a_BlockZ;
+	cChunkDef::AbsoluteToRelative(BlockX, BlockY, BlockZ, ChunkX, ChunkZ);
+	cCSLock Lock(m_CSLayers);
+	cChunkPtr Chunk = GetChunkNoGen(ChunkX, ZERO_CHUNK_Y, ChunkZ);
+	if ((Chunk == NULL) && !Chunk->IsValid())
+	{
+		return false;
+	}
+	return Chunk->DoWithCommandBlockAt(a_BlockX, a_BlockY, a_BlockZ, a_Callback);
+}
+
+
+
+
 
 bool cChunkMap::GetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4)
 {
diff --git a/src/ChunkMap.h b/src/ChunkMap.h
index e688d1f93..e9d8ee30b 100644
--- a/src/ChunkMap.h
+++ b/src/ChunkMap.h
@@ -23,6 +23,7 @@ class cDropperEntity;
 class cDropSpenserEntity;
 class cFurnaceEntity;
 class cNoteEntity;
+class cCommandBlockEntity;
 class cPawn;
 class cPickup;
 class cChunkDataSerializer;
@@ -32,15 +33,16 @@ class cMobSpawner;
 
 typedef std::list<cClientHandle *>  cClientHandleList;
 typedef cChunk * cChunkPtr;
-typedef cItemCallback<cEntity>            cEntityCallback;
-typedef cItemCallback<cBlockEntity>       cBlockEntityCallback;
-typedef cItemCallback<cChestEntity>       cChestCallback;
-typedef cItemCallback<cDispenserEntity>   cDispenserCallback;
-typedef cItemCallback<cDropperEntity>     cDropperCallback;
-typedef cItemCallback<cDropSpenserEntity> cDropSpenserCallback;
-typedef cItemCallback<cFurnaceEntity>     cFurnaceCallback;
-typedef cItemCallback<cNoteEntity>        cNoteBlockCallback;
-typedef cItemCallback<cChunk>             cChunkCallback;
+typedef cItemCallback<cEntity>             cEntityCallback;
+typedef cItemCallback<cBlockEntity>        cBlockEntityCallback;
+typedef cItemCallback<cChestEntity>        cChestCallback;
+typedef cItemCallback<cDispenserEntity>    cDispenserCallback;
+typedef cItemCallback<cDropperEntity>      cDropperCallback;
+typedef cItemCallback<cDropSpenserEntity>  cDropSpenserCallback;
+typedef cItemCallback<cFurnaceEntity>      cFurnaceCallback;
+typedef cItemCallback<cNoteEntity>         cNoteBlockCallback;
+typedef cItemCallback<cCommandBlockEntity> cCommandBlockCallback;
+typedef cItemCallback<cChunk>              cChunkCallback;
 
 
 
@@ -236,6 +238,9 @@ public:
 	/// Calls the callback for the noteblock at the specified coords; returns false if there's no noteblock at those coords or callback returns true, returns true if found
 	bool DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNoteBlockCallback & a_Callback);  // Lua-accessible
 
+	/// Calls the callback for the command block at the specified coords; returns false if there's no command block at those coords or callback returns true, returns true if found
+	bool DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCommandBlockCallback & a_Callback);  // Lua-accessible
+
 	/// Retrieves the test on the sign at the specified coords; returns false if there's no sign at those coords, true if found
 	bool GetSignLines (int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4);  // Lua-accessible
 
diff --git a/src/ClientHandle.cpp b/src/ClientHandle.cpp
index c8513d516..faf583fbb 100644
--- a/src/ClientHandle.cpp
+++ b/src/ClientHandle.cpp
@@ -8,6 +8,7 @@
 #include "Entities/Player.h"
 #include "Inventory.h"
 #include "BlockEntities/ChestEntity.h"
+#include "BlockEntities/CommandBlockEntity.h"
 #include "BlockEntities/SignEntity.h"
 #include "UI/Window.h"
 #include "Item.h"
@@ -545,6 +546,15 @@ void cClientHandle::HandlePlayerPos(double a_PosX, double a_PosY, double a_PosZ,
 
 void cClientHandle::HandlePluginMessage(const AString & a_Channel, const AString & a_Message)
 {
+	if (a_Channel == "MC|AdvCdm") // Command block
+	{
+		const char* Data = a_Message.c_str();
+
+		HandleCommandBlockMessage(Data, a_Message.size());
+
+		return;
+	}
+
 	cPluginManager::Get()->CallHookPluginMessage(*this, a_Channel, a_Message);
 }
 
@@ -552,6 +562,67 @@ void cClientHandle::HandlePluginMessage(const AString & a_Channel, const AString
 
 
 
+void cClientHandle::HandleCommandBlockMessage(const char* a_Data, unsigned int a_Length)
+{
+	if (a_Length < 14)
+	{
+		LOGD("Malformed MC|AdvCdm packet.");
+		return;
+	}
+
+	cByteBuffer Buffer(a_Length);
+	Buffer.Write(a_Data, a_Length);
+
+	int BlockX, BlockY, BlockZ;
+
+	AString Command;
+
+	char Mode;
+
+	Buffer.ReadChar(Mode);
+
+	switch (Mode)
+	{
+		case 0x00:
+		{
+			Buffer.ReadBEInt(BlockX);
+			Buffer.ReadBEInt(BlockY);
+			Buffer.ReadBEInt(BlockZ);
+
+			Buffer.ReadVarUTF8String(Command);
+			break;
+		}
+
+		default:
+		{
+			LOGD("Unhandled MC|AdvCdm packet mode.");
+			return;
+		}
+	}
+
+	class cUpdateCommandBlock :
+		public cCommandBlockCallback
+	{
+		AString m_Command;
+	public:
+		cUpdateCommandBlock(const AString & a_Command) : m_Command(a_Command) {}
+			
+		virtual bool Item(cCommandBlockEntity * a_CommandBlock) override
+		{
+			a_CommandBlock->SetCommand(m_Command);
+			return false;
+		}
+	} CmdBlockCB (Command);
+
+	cWorld * World = m_Player->GetWorld();
+
+	World->DoWithCommandBlockAt(BlockX, BlockY, BlockZ, CmdBlockCB);
+}
+
+
+
+
+
 void cClientHandle::HandleLeftClick(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, char a_Status)
 {
 	LOGD("HandleLeftClick: {%i, %i, %i}; Face: %i; Stat: %i",
diff --git a/src/ClientHandle.h b/src/ClientHandle.h
index da2704b72..373ca9e2e 100644
--- a/src/ClientHandle.h
+++ b/src/ClientHandle.h
@@ -324,6 +324,9 @@ private:
 	
 	/// Handles the DIG_FINISHED dig packet:
 	void HandleBlockDigFinished(int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, BLOCKTYPE a_OldBlock, NIBBLETYPE a_OldMeta);
+
+	/// Handles the "MC|AdvCdm" plugin message
+	void HandleCommandBlockMessage(const char* a_Data, unsigned int a_Length);
 	
 	// cSocketThreads::cCallback overrides:
 	virtual void DataReceived   (const char * a_Data, int a_Size) override;  // Data is received from the client
diff --git a/src/Server.cpp b/src/Server.cpp
index 49067c17f..5280270b9 100644
--- a/src/Server.cpp
+++ b/src/Server.cpp
@@ -459,7 +459,7 @@ void cServer::ExecuteConsoleCommand(const AString & a_Cmd, cCommandOutputCallbac
 	{
 		return;
 	}
-	
+
 	// Special handling: "stop" and "restart" are built in
 	if ((split[0].compare("stop") == 0) || (split[0].compare("restart") == 0))
 	{
diff --git a/src/Simulator/RedstoneSimulator.cpp b/src/Simulator/RedstoneSimulator.cpp
index 469680098..e361cbf49 100644
--- a/src/Simulator/RedstoneSimulator.cpp
+++ b/src/Simulator/RedstoneSimulator.cpp
@@ -4,6 +4,7 @@
 #include "RedstoneSimulator.h"
 #include "../BlockEntities/DropSpenserEntity.h"
 #include "../BlockEntities/NoteEntity.h"
+#include "../BlockEntities/CommandBlockEntity.h"
 #include "../Entities/TNTEntity.h"
 #include "../Blocks/BlockTorch.h"
 #include "../Blocks/BlockDoor.h"
@@ -215,11 +216,12 @@ void cRedstoneSimulator::SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, c
 		{
 			case E_BLOCK_BLOCK_OF_REDSTONE:     HandleRedstoneBlock(a_X, dataitr->y, a_Z);	break;
 			case E_BLOCK_LEVER:                 HandleRedstoneLever(a_X, dataitr->y, a_Z);	break;
-			case E_BLOCK_TNT:                   HandleTNT(a_X, dataitr->y, a_Z);			break;
+			case E_BLOCK_TNT:                   HandleTNT(a_X, dataitr->y, a_Z);            break;
 			case E_BLOCK_TRAPDOOR:              HandleTrapdoor(a_X, dataitr->y, a_Z);       break;
 			case E_BLOCK_REDSTONE_WIRE:         HandleRedstoneWire(a_X, dataitr->y, a_Z);	break;
 			case E_BLOCK_NOTE_BLOCK:            HandleNoteBlock(a_X, dataitr->y, a_Z);      break;
 			case E_BLOCK_DAYLIGHT_SENSOR:       HandleDaylightSensor(a_X, dataitr->y, a_Z); break;
+			case E_BLOCK_COMMAND_BLOCK:         HandleCommandBlock(a_X, dataitr->y, a_Z);   break;
 
 			case E_BLOCK_REDSTONE_TORCH_OFF:
 			case E_BLOCK_REDSTONE_TORCH_ON:
@@ -763,6 +765,29 @@ void cRedstoneSimulator::HandleDoor(int a_BlockX, int a_BlockY, int a_BlockZ)
 
 
 
+void cRedstoneSimulator::HandleCommandBlock(int a_BlockX, int a_BlockY, int a_BlockZ)
+{
+	class cSetPowerToCommandBlock :
+		public cCommandBlockCallback
+	{
+		bool m_IsPowered;
+	public:
+		cSetPowerToCommandBlock(bool a_IsPowered) : m_IsPowered(a_IsPowered) {}
+				
+		virtual bool Item(cCommandBlockEntity * a_CommandBlock) override
+		{
+			a_CommandBlock->SetRedstonePower(m_IsPowered);
+			return false;
+		}
+	} CmdBlockSP (AreCoordsPowered(a_BlockX, a_BlockY, a_BlockZ));
+
+	m_World.DoWithCommandBlockAt(a_BlockX, a_BlockY, a_BlockZ, CmdBlockSP);
+}
+
+
+
+
+
 void cRedstoneSimulator::HandleRail(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_MyType)
 {
 	switch (a_MyType)
diff --git a/src/Simulator/RedstoneSimulator.h b/src/Simulator/RedstoneSimulator.h
index 63a5be3d3..bb2efeb8a 100644
--- a/src/Simulator/RedstoneSimulator.h
+++ b/src/Simulator/RedstoneSimulator.h
@@ -110,6 +110,8 @@ private:
 	void HandleRedstoneLamp(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_MyState);
 	/** Handles doords */
 	void HandleDoor(int a_BlockX, int a_BlockY, int a_BlockZ);
+	/** Handles command blocks */
+	void HandleCommandBlock(int a_BlockX, int a_BlockY, int a_BlockZ);
 	/** Handles activator, detector, and powered rails */
 	void HandleRail(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_MyType);
 	/** Handles trapdoors */
@@ -166,6 +168,7 @@ private:
 		switch (Block)
 		{
 			case E_BLOCK_ACTIVATOR_RAIL:
+			case E_BLOCK_COMMAND_BLOCK:
 			case E_BLOCK_PISTON:
 			case E_BLOCK_STICKY_PISTON:
 			case E_BLOCK_DISPENSER:
@@ -220,6 +223,7 @@ private:
 			case E_BLOCK_ACTIVATOR_RAIL:
 			case E_BLOCK_ACTIVE_COMPARATOR:
 			case E_BLOCK_BLOCK_OF_REDSTONE:
+			case E_BLOCK_COMMAND_BLOCK:
 			case E_BLOCK_DETECTOR_RAIL:
 			case E_BLOCK_DISPENSER:
 			case E_BLOCK_DAYLIGHT_SENSOR:
diff --git a/src/World.cpp b/src/World.cpp
index 3e7c0ef74..7c56d2efb 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -1149,6 +1149,15 @@ bool cWorld::DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNoteBl
 
 
 
+bool cWorld::DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCommandBlockCallback & a_Callback)
+{
+	return m_ChunkMap->DoWithCommandBlockAt(a_BlockX, a_BlockY, a_BlockZ, a_Callback);
+}
+
+
+
+
+
 bool cWorld::GetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4)
 {
 	return m_ChunkMap->GetSignLines(a_BlockX, a_BlockY, a_BlockZ, a_Line1, a_Line2, a_Line3, a_Line4);
diff --git a/src/World.h b/src/World.h
index ef74a65c7..1a7ad0cb1 100644
--- a/src/World.h
+++ b/src/World.h
@@ -46,12 +46,13 @@ class cMobCensus;
 
 typedef std::list< cPlayer * > cPlayerList;
 
-typedef cItemCallback<cPlayer>          cPlayerListCallback;
-typedef cItemCallback<cEntity>          cEntityCallback;
-typedef cItemCallback<cChestEntity>     cChestCallback;
-typedef cItemCallback<cDispenserEntity> cDispenserCallback;
-typedef cItemCallback<cFurnaceEntity>   cFurnaceCallback;
-typedef cItemCallback<cNoteEntity>      cNoteBlockCallback;
+typedef cItemCallback<cPlayer>             cPlayerListCallback;
+typedef cItemCallback<cEntity>             cEntityCallback;
+typedef cItemCallback<cChestEntity>        cChestCallback;
+typedef cItemCallback<cDispenserEntity>    cDispenserCallback;
+typedef cItemCallback<cFurnaceEntity>      cFurnaceCallback;
+typedef cItemCallback<cNoteEntity>         cNoteBlockCallback;
+typedef cItemCallback<cCommandBlockEntity> cCommandBlockCallback;
 
 
 
@@ -466,6 +467,9 @@ public:
 
 	/// Calls the callback for the noteblock at the specified coords; returns false if there's no noteblock at those coords or callback returns true, returns true if found
 	bool DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNoteBlockCallback & a_Callback);  // Exported in ManualBindings.cpp
+
+	/// Calls the callback for the command block at the specified coords; returns false if there's no command block at those coords or callback returns true, returns true if found
+	bool DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCommandBlockCallback & a_Callback);  // Exported in ManualBindings.cpp
 	
 	/// Retrieves the test on the sign at the specified coords; returns false if there's no sign at those coords, true if found
 	bool GetSignLines (int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4);  // Exported in ManualBindings.cpp
diff --git a/src/WorldStorage/NBTChunkSerializer.cpp b/src/WorldStorage/NBTChunkSerializer.cpp
index e1205f2be..447296c7f 100644
--- a/src/WorldStorage/NBTChunkSerializer.cpp
+++ b/src/WorldStorage/NBTChunkSerializer.cpp
@@ -10,6 +10,7 @@
 #include "FastNBT.h"
 
 #include "../BlockEntities/ChestEntity.h"
+#include "../BlockEntities/CommandBlockEntity.h"
 #include "../BlockEntities/DispenserEntity.h"
 #include "../BlockEntities/DropperEntity.h"
 #include "../BlockEntities/FurnaceEntity.h"
@@ -219,8 +220,23 @@ void cNBTChunkSerializer::AddJukeboxEntity(cJukeboxEntity * a_Jukebox)
 void cNBTChunkSerializer::AddNoteEntity(cNoteEntity * a_Note)
 {
 	m_Writer.BeginCompound("");
-	AddBasicTileEntity(a_Note, "Music");
-	m_Writer.AddByte("note", a_Note->GetPitch());
+		AddBasicTileEntity(a_Note, "Music");
+		m_Writer.AddByte("note", a_Note->GetPitch());
+	m_Writer.EndCompound();
+}
+
+
+
+
+
+void cNBTChunkSerializer::AddCommandBlockEntity(cCommandBlockEntity * a_CmdBlock)
+{
+	m_Writer.BeginCompound("");
+		AddBasicTileEntity(a_CmdBlock, "Control");
+		m_Writer.AddString("Command",      a_CmdBlock->GetCommand());
+		m_Writer.AddInt   ("SuccessCount", a_CmdBlock->GetResult());
+		m_Writer.AddString("LastOutput",   a_CmdBlock->GetLastOutput());
+		m_Writer.AddByte  ("TrackOutput",  1); // TODO 2014-01-18 xdot: Figure out what TrackOutput is and save it.
 	m_Writer.EndCompound();
 }
 
@@ -639,15 +655,16 @@ void cNBTChunkSerializer::BlockEntity(cBlockEntity * a_Entity)
 	// Add tile-entity into NBT:
 	switch (a_Entity->GetBlockType())
 	{
-		case E_BLOCK_CHEST:      AddChestEntity     ((cChestEntity *)     a_Entity); break;
-		case E_BLOCK_DISPENSER:  AddDispenserEntity ((cDispenserEntity *) a_Entity); break;
-		case E_BLOCK_DROPPER:    AddDropperEntity   ((cDropperEntity *)   a_Entity); break;
-		case E_BLOCK_FURNACE:    AddFurnaceEntity   ((cFurnaceEntity *)   a_Entity); break;
-		case E_BLOCK_HOPPER:     AddHopperEntity    ((cHopperEntity *)    a_Entity); break;
+		case E_BLOCK_CHEST:         AddChestEntity     ((cChestEntity *)     a_Entity); break;
+		case E_BLOCK_DISPENSER:     AddDispenserEntity ((cDispenserEntity *) a_Entity); break;
+		case E_BLOCK_DROPPER:       AddDropperEntity   ((cDropperEntity *)   a_Entity); break;
+		case E_BLOCK_FURNACE:       AddFurnaceEntity   ((cFurnaceEntity *)   a_Entity); break;
+		case E_BLOCK_HOPPER:        AddHopperEntity    ((cHopperEntity *)    a_Entity); break;
 		case E_BLOCK_SIGN_POST:
-		case E_BLOCK_WALLSIGN:   AddSignEntity      ((cSignEntity *)      a_Entity); break;
-		case E_BLOCK_NOTE_BLOCK: AddNoteEntity      ((cNoteEntity *)      a_Entity); break;
-		case E_BLOCK_JUKEBOX:    AddJukeboxEntity   ((cJukeboxEntity *)   a_Entity); break;
+		case E_BLOCK_WALLSIGN:      AddSignEntity      ((cSignEntity *)      a_Entity); break;
+		case E_BLOCK_NOTE_BLOCK:    AddNoteEntity      ((cNoteEntity *)      a_Entity); break;
+		case E_BLOCK_JUKEBOX:       AddJukeboxEntity   ((cJukeboxEntity *)   a_Entity); break;
+		case E_BLOCK_COMMAND_BLOCK: AddCommandBlockEntity((cCommandBlockEntity *) a_Entity); break;
 		default:
 		{
 			ASSERT(!"Unhandled block entity saved into Anvil");
diff --git a/src/WorldStorage/NBTChunkSerializer.h b/src/WorldStorage/NBTChunkSerializer.h
index 9d4ac208c..245b68063 100644
--- a/src/WorldStorage/NBTChunkSerializer.h
+++ b/src/WorldStorage/NBTChunkSerializer.h
@@ -21,6 +21,7 @@ class cEntity;
 class cBlockEntity;
 class cBoat;
 class cChestEntity;
+class cCommandBlockEntity;
 class cDispenserEntity;
 class cDropperEntity;
 class cFurnaceEntity;
@@ -92,6 +93,7 @@ protected:
 	void AddJukeboxEntity  (cJukeboxEntity *   a_Jukebox);
 	void AddNoteEntity     (cNoteEntity *      a_Note);
 	void AddSignEntity     (cSignEntity *      a_Sign);
+	void AddCommandBlockEntity(cCommandBlockEntity * a_CmdBlock);
 	
 	// Entities:
 	void AddBasicEntity       (cEntity * a_Entity, const AString & a_ClassName);
diff --git a/src/WorldStorage/WSSAnvil.cpp b/src/WorldStorage/WSSAnvil.cpp
index 16513cd1b..96a77152b 100644
--- a/src/WorldStorage/WSSAnvil.cpp
+++ b/src/WorldStorage/WSSAnvil.cpp
@@ -15,6 +15,7 @@
 #include "../StringCompression.h"
 
 #include "../BlockEntities/ChestEntity.h"
+#include "../BlockEntities/CommandBlockEntity.h"
 #include "../BlockEntities/DispenserEntity.h"
 #include "../BlockEntities/DropperEntity.h"
 #include "../BlockEntities/FurnaceEntity.h"
@@ -567,6 +568,10 @@ void cWSSAnvil::LoadBlockEntitiesFromNBT(cBlockEntityList & a_BlockEntities, con
 		{
 			LoadChestFromNBT(a_BlockEntities, a_NBT, Child);
 		}
+		else if (strncmp(a_NBT.GetData(sID), "Control", a_NBT.GetDataLength(sID)) == 0)
+		{
+			LoadCommandBlockFromNBT(a_BlockEntities, a_NBT, Child);
+		}
 		else if (strncmp(a_NBT.GetData(sID), "Dropper", a_NBT.GetDataLength(sID)) == 0)
 		{
 			LoadDropperFromNBT(a_BlockEntities, a_NBT, Child);
@@ -915,6 +920,43 @@ void cWSSAnvil::LoadSignFromNBT(cBlockEntityList & a_BlockEntities, const cParse
 
 
 
+void cWSSAnvil::LoadCommandBlockFromNBT(cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx)
+{
+	ASSERT(a_NBT.GetType(a_TagIdx) == TAG_Compound);
+	int x, y, z;
+	if (!GetBlockEntityNBTPos(a_NBT, a_TagIdx, x, y, z))
+	{
+		return;
+	}
+	std::auto_ptr<cCommandBlockEntity> CmdBlock(new cCommandBlockEntity(x, y, z, m_World));
+
+	int currentLine = a_NBT.FindChildByName(a_TagIdx, "Command");
+	if (currentLine >= 0)
+	{
+		CmdBlock->SetCommand(a_NBT.GetString(currentLine));
+	}
+
+	currentLine = a_NBT.FindChildByName(a_TagIdx, "SuccessCount");
+	if (currentLine >= 0)
+	{
+		CmdBlock->SetResult(a_NBT.GetInt(currentLine));
+	}
+
+	currentLine = a_NBT.FindChildByName(a_TagIdx, "LastOutput");
+	if (currentLine >= 0)
+	{
+		CmdBlock->SetLastOutput(a_NBT.GetString(currentLine));
+	}
+
+	// TODO 2014-01-18 xdot: Figure out what TrackOutput is and parse it.
+
+	a_BlockEntities.push_back(CmdBlock.release());
+}
+
+
+
+
+
 void cWSSAnvil::LoadEntityFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_EntityTagIdx, const char * a_IDTag, int a_IDTagLength)
 {
 	if (strncmp(a_IDTag, "Boat", a_IDTagLength) == 0)
diff --git a/src/WorldStorage/WSSAnvil.h b/src/WorldStorage/WSSAnvil.h
index e66e63b08..5093ad083 100644
--- a/src/WorldStorage/WSSAnvil.h
+++ b/src/WorldStorage/WSSAnvil.h
@@ -131,14 +131,15 @@ protected:
 	*/
 	void LoadItemGridFromNBT(cItemGrid & a_ItemGrid, const cParsedNBT & a_NBT, int a_ItemsTagIdx, int s_SlotOffset = 0);
 	
-	void LoadChestFromNBT     (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
-	void LoadDispenserFromNBT (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
-	void LoadDropperFromNBT   (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
-	void LoadFurnaceFromNBT   (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx, BLOCKTYPE * a_BlockTypes, NIBBLETYPE * a_BlockMetas);
-	void LoadHopperFromNBT    (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
-	void LoadJukeboxFromNBT   (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
-	void LoadNoteFromNBT      (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
-	void LoadSignFromNBT      (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+	void LoadChestFromNBT       (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+	void LoadDispenserFromNBT   (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+	void LoadDropperFromNBT     (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+	void LoadFurnaceFromNBT     (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx, BLOCKTYPE * a_BlockTypes, NIBBLETYPE * a_BlockMetas);
+	void LoadHopperFromNBT      (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+	void LoadJukeboxFromNBT     (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+	void LoadNoteFromNBT        (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+	void LoadSignFromNBT        (cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
+	void LoadCommandBlockFromNBT(cBlockEntityList & a_BlockEntities, const cParsedNBT & a_NBT, int a_TagIdx);
 	
 	void LoadEntityFromNBT(cEntityList & a_Entities, const cParsedNBT & a_NBT, int a_EntityTagIdx, const char * a_IDTag, int a_IDTagLength);