From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.World/SynchedEntityData.h | 127 ++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 Minecraft.World/SynchedEntityData.h

(limited to 'Minecraft.World/SynchedEntityData.h')

diff --git a/Minecraft.World/SynchedEntityData.h b/Minecraft.World/SynchedEntityData.h
new file mode 100644
index 00000000..e79a10b8
--- /dev/null
+++ b/Minecraft.World/SynchedEntityData.h
@@ -0,0 +1,127 @@
+#pragma once
+using namespace std;
+
+class Pos;
+
+
+class SynchedEntityData
+{
+public:
+	class DataItem
+	{
+		friend class SynchedEntityData;
+	private:
+		const int type;
+		const int id;
+		// 4J - there used to be one "value" type here of general type Object, just storing the different (used) varieties
+		// here separately for us
+		byte	value_byte;
+		int		value_int;
+		short	value_short;
+		wstring	value_wstring;
+		shared_ptr<ItemInstance> value_itemInstance;
+		bool dirty;
+
+	public:
+		// There was one type here that took a generic Object type, using overloading here instead
+		DataItem(int type, int id, byte value);
+		DataItem(int type, int id, int value);
+		DataItem(int type, int id, const wstring& value);
+		DataItem(int type, int id, shared_ptr<ItemInstance> itemInstance);
+		DataItem(int type, int id, short value);
+
+		int getId();
+		void setValue(byte value);
+		void setValue(int value);
+		void setValue(short value);
+		void setValue(const wstring& value);
+		void setValue(shared_ptr<ItemInstance> value);
+		byte getValue_byte();
+		int getValue_int();
+		short getValue_short();
+		wstring getValue_wstring();
+		shared_ptr<ItemInstance> getValue_itemInstance();
+		int getType();
+		bool isDirty();
+		void setDirty(bool dirty);
+	};
+
+public:
+	static const int MAX_STRING_DATA_LENGTH = 64;
+	static const int EOF_MARKER = 0x7f;
+
+private:
+	static const int TYPE_BYTE = 0;
+	static const int TYPE_SHORT = 1;
+	static const int TYPE_INT = 2;
+	static const int TYPE_FLOAT = 3;
+	static const int TYPE_STRING = 4;
+	// special types (max possible value is 7):
+	static const int TYPE_ITEMINSTANCE = 5;
+	static const int TYPE_POS = 6;
+
+private:
+	bool m_isEmpty;
+
+	// must have enough bits to fit the type
+private:
+	static const int TYPE_MASK = 0xe0;
+	static const int TYPE_SHIFT = 5;
+
+	// the id value must fit in the remaining bits
+	static const int MAX_ID_VALUE = ~TYPE_MASK & 0xff;
+
+	unordered_map<int, shared_ptr<DataItem> > itemsById;
+	bool m_isDirty;
+
+public:
+	SynchedEntityData();
+
+	// 4J - this function used to be a template, but there's only 3 varieties of use I've found so just hard-coding now, as
+	// the original had some automatic Class to type sort of conversion that's a real pain for us to actually do
+	void define(int id, byte value);
+	void define(int id, const wstring& value);
+	void define(int id, int value);
+	void define(int id, short value);
+	void defineNULL(int id, void *pVal);
+
+	void checkId(int id);	// 4J - added to contain common code from overloaded define functions above
+	byte getByte(int id);
+	short getShort(int id);
+	int getInteger(int id);
+	float getFloat(int id);
+	wstring getString(int id);
+	shared_ptr<ItemInstance> getItemInstance(int id);
+	Pos *getPos(int id);
+	// 4J - using overloads rather than template here
+	void set(int id, byte value);
+	void set(int id, int value);
+	void set(int id, short value);
+	void set(int id, const wstring& value);
+	void set(int id, shared_ptr<ItemInstance>);
+	void markDirty(int id);
+	bool isDirty();
+	static void pack(vector<shared_ptr<DataItem> > *items, DataOutputStream *output); // TODO throws IOException
+	vector<shared_ptr<DataItem> > *packDirty();
+	void packAll(DataOutputStream *output); // throws IOException
+	vector<shared_ptr<DataItem> > *getAll();
+
+private:
+	static void writeDataItem(DataOutputStream *output, shared_ptr<DataItem> dataItem); //throws IOException
+
+
+public:
+	static vector<shared_ptr<DataItem> > *unpack(DataInputStream *input); // throws IOException
+
+	/**
+	* Assigns values from a list of data items.
+	* 
+	* @param items
+	*/
+public:
+	void assignValues(vector<shared_ptr<DataItem> > *items);
+	bool isEmpty();
+
+	// 4J Added
+	int getSizeInBytes();
+};
\ No newline at end of file
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