first commit

.clang-format

@@ -0,0 +1,37 @@
+Language: Cpp
+BasedOnStyle: LLVM
+
+AlignAfterOpenBracket: DontAlign
+BreakConstructorInitializers: AfterColon
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+PointerAlignment: Left
+SortIncludes: true
+SpacesBeforeTrailingComments: 2
+UseTab: Always
+MaxEmptyLinesToKeep: 5
+
+TabWidth: 4
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+IndentWidth: 4
+IndentCaseLabels: true
+
+ColumnLimit: 135
+AlwaysBreakTemplateDeclarations: Yes
+
+AllowShortFunctionsOnASingleLine: Empty
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterClass: false
+  AfterControlStatement: false
+  AfterEnum: false
+  AfterExternBlock: false
+  AfterFunction: false
+  AfterNamespace: false
+  AfterStruct: false
+  AfterUnion: false
+  BeforeCatch: false
+  BeforeElse: false
+  IndentBraces: false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true

.gitignore

@@ -0,0 +1,9 @@
+# Xmake cache
+.xmake/
+build/
+
+# MacOS Cache
+.DS_Store
+
+
+.vscode

include/sp/Types.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <cstdint>
+
+namespace sp {
+
+using PeerID = std::uint16_t;
+
+}  // namespace sp

include/sp/common/DataBuffer.h

@@ -0,0 +1,300 @@
+#pragma once
+
+/**
+ * \file DataBuffer.h
+ * \brief File containing the sp::DataBuffer class
+ */
+
+#include <algorithm>
+#include <array>
+#include <cassert>
+#include <cstdint>
+#include <cstring>
+#include <string>
+#include <sp/common/VarInt.h>
+#include <vector>
+
+namespace sp {
+
+/**
+ * \class DataBuffer
+ * \brief Class used to manipulate memory
+ */
+class DataBuffer {
+  private:
+	typedef std::vector<std::uint8_t> Data;
+	Data m_Buffer;
+	std::size_t m_ReadOffset;
+
+  public:
+	typedef Data::iterator iterator;
+	typedef Data::const_iterator const_iterator;
+	typedef Data::reference reference;
+	typedef Data::const_reference const_reference;
+	typedef Data::difference_type difference_type;
+
+	DataBuffer();
+	DataBuffer(const DataBuffer& other);
+	DataBuffer(const DataBuffer& other, difference_type offset);
+	DataBuffer(DataBuffer&& other);
+	DataBuffer(const std::string& str);
+
+	DataBuffer& operator=(const DataBuffer& other);
+	DataBuffer& operator=(DataBuffer&& other);
+
+	/**
+	 * \brief Append data to the buffer
+	 */
+	template <typename T>
+	void Append(const T& data) {
+		std::size_t size = sizeof(data);
+		std::size_t end_pos = m_Buffer.size();
+		m_Buffer.resize(m_Buffer.size() + size);
+		std::memcpy(&m_Buffer[end_pos], &data, size);
+	}
+
+	/**
+	 * \brief Append data to the buffer
+	 */
+	template <typename T>
+	DataBuffer& operator<<(const T& data) {
+		Append(data);
+		return *this;
+	}
+
+	/**
+	 * \brief Append a string to the buffer
+	 * \warning Don't use it for binary data !
+	 * \param str The string to append
+	 */
+	DataBuffer& operator<<(const std::string& str);
+
+	/**
+	 * \brief Append data to the buffer from another const buffer
+	 * \param data The buffer to append
+	 */
+	DataBuffer& operator<<(const DataBuffer& data);
+
+	/**
+	 * \brief Append a vector to the buffer by first writing the size
+	 * \param data The vector to append
+	 */
+	template <typename T>
+	DataBuffer& operator<<(const std::vector<T>& data) {
+		*this << VarInt{data.size()};
+		for (const auto& element : data) {
+			*this << element;
+		}
+		return *this;
+	}
+
+	/**
+	 * \brief Append an array to the buffer by first writing the size
+	 * \param data The buffer to append
+	 */
+	template <typename T, std::size_t Size>
+	DataBuffer& operator<<(const std::array<T, Size>& data) {
+		for (const auto& element : data) {
+			*this << element;
+		}
+		return *this;
+	}
+
+	/**
+	 * \brief Read some data from the buffer and assign to desired variable
+	 */
+	template <typename T>
+	DataBuffer& operator>>(T& data) {
+		assert(m_ReadOffset + sizeof(T) <= GetSize());
+		data = *(reinterpret_cast<T*>(&m_Buffer[m_ReadOffset]));
+		m_ReadOffset += sizeof(T);
+		return *this;
+	}
+
+	/**
+	 * \brief Read some data from the buffer and assign to the new buffer
+	 * \param data The buffer to assign
+	 */
+	DataBuffer& operator>>(DataBuffer& data);
+
+	/**
+	 * \brief Read a string from the buffer
+	 * \param str The string to assign in the new buffer
+	 * \warning Don't use it for binary data !
+	 */
+	DataBuffer& operator>>(std::string& str);
+
+	/**
+	 * \brief Read a vector (size + data) from the buffer
+	 * \pre The vector is assumed to be empty
+	 */
+	template <typename T>
+	DataBuffer& operator>>(std::vector<T>& data) {
+		VarInt arraySize;
+		*this >> arraySize;
+		for (std::size_t i = 0; i < arraySize.GetValue(); i++) {
+			T newElement;
+			*this >> newElement;
+			data.push_back(newElement);
+		}
+		return *this;
+	}
+
+	/**
+	 * \brief Read an array from the buffer
+	 */
+	template <std::size_t Size, typename T>
+	DataBuffer& operator>>(std::array<T, Size>& data) {
+		for (std::size_t i = 0; i < Size; i++) {
+			T newElement;
+			*this >> newElement;
+			data[i] = newElement;
+		}
+		return *this;
+	}
+
+	/**
+	 * \brief Write some data to the buffer
+	 * \param buffer The buffer to write
+	 * \param amount The amount of data to write
+	 */
+	void WriteSome(const char* buffer, std::size_t amount);
+
+	/**
+	 * \brief Write some data to the buffer
+	 * \param buffer The buffer to write
+	 * \param amount The amount of data to write
+	 */
+	void WriteSome(const std::uint8_t* buffer, std::size_t amount);
+
+	/**
+	 * \brief Read some data from the buffer
+	 * \param buffer The buffer to Read
+	 * \param amount The amount of data from the buffer
+	 */
+	void ReadSome(char* buffer, std::size_t amount);
+
+	/**
+	 * \brief Read some data from the buffer
+	 * \param buffer The buffer to Read
+	 * \param amount The amount of data from the buffer
+	 */
+	void ReadSome(std::uint8_t* buffer, std::size_t amount);
+
+	/**
+	 * \brief Read some data from the buffer
+	 * \param buffer The buffer to Read
+	 * \param amount The amount of data from the buffer
+	 */
+	void ReadSome(DataBuffer& buffer, std::size_t amount);
+
+	/**
+	 * \brief Resize the buffer
+	 * \param size The new size of the buffer
+	 */
+	void Resize(std::size_t size) {
+		m_Buffer.resize(size);
+	}
+
+	/**
+	 * \brief Reserve some space in the buffer
+	 * \param amount The amount of space to reserve
+	 */
+	void Reserve(std::size_t amount) {
+		m_Buffer.reserve(amount);
+	}
+
+
+	/**
+	 * \brief Clear the buffer
+	 */
+	void Clear() {
+		m_Buffer.clear();
+		m_ReadOffset = 0;
+	}
+
+	/**
+	 * \brief When the buffer has been read entirely
+	 */
+	bool IsFinished() const {
+		return m_ReadOffset >= m_Buffer.size();
+	}
+
+	/**
+	 * \brief Get the buffer data
+	 */
+	std::uint8_t* data() {
+		return m_Buffer.data();
+	}
+
+	/**
+	 * \brief Get the buffer data
+	 */
+	const std::uint8_t* data() const {
+		return m_Buffer.data();
+	}
+
+	/**
+	 * \brief Get the read offset
+	 */
+	std::size_t GetReadOffset() const {
+		return m_ReadOffset;
+	}
+
+	/**
+	 * \brief Set the read offset
+	 * \param pos The new read offset
+	 */
+	void SetReadOffset(std::size_t pos);
+
+	/**
+	 * \brief Get the size of the buffer
+	 */
+	std::size_t GetSize() const;
+
+	/**
+	 * \brief Get the remaining size of the buffer
+	 */
+	std::size_t GetRemaining() const;
+
+	/**
+	 * \brief Read a file into the buffer
+	 * \param fileName The name of the file to read
+	 */
+	bool ReadFile(const std::string& fileName);
+
+	/**
+	 * \brief Write a file into the buffer
+	 * \param fileName The name of the file to write to
+	 */
+	bool WriteFile(const std::string& fileName) const;
+
+	/**
+	 * \brief Allocate the buffer on the heap
+	 * \warning Don't forget to free the data !
+	 */
+	std::uint8_t* HeapAllocatedData() const {
+		std::uint8_t* newBuffer = new std::uint8_t[GetSize()];
+		std::memcpy(newBuffer, data(), GetSize());
+		return newBuffer;
+	}
+
+	/**
+	 * \brief Operator == to compare two DataBuffer
+	 */
+	bool operator==(const DataBuffer& other) const {
+		return m_Buffer == other.m_Buffer;
+	}
+
+	iterator begin();
+	iterator end();
+	const_iterator begin() const;
+	const_iterator end() const;
+};
+
+/**
+ * \brief Operator << to write a DataBuffer to an ostream
+ */
+std::ostream& operator<<(std::ostream& os, const DataBuffer& buffer);
+
+}  // namespace sp

include/sp/common/NonCopyable.h

@@ -0,0 +1,25 @@
+#pragma once
+
+/**
+ * \file NonCopyable.h
+ * \brief File containing the sp::NonCopyable class
+ */
+
+namespace sp {
+
+/**
+ * \class NonCopyable
+ * \brief Class used to make a class non copyable
+ * \note Inherit from this class privately to make a class non copyable
+ */
+class NonCopyable {
+  public:
+	NonCopyable(const NonCopyable&) = delete;
+	NonCopyable& operator=(const NonCopyable&) = delete;
+
+  protected:
+	NonCopyable() {}
+	~NonCopyable() {}
+};
+
+}  // namespace sp

include/sp/common/VarInt.h

@@ -0,0 +1,58 @@
+#pragma once
+
+/**
+ * \file VarInt.h
+ * \brief File containing the sp::VarInt class
+ */
+
+#include <cstddef>
+#include <cstdint>
+
+namespace sp {
+
+class DataBuffer;
+
+/**
+ * \class VarInt
+ * \brief Variable-length format such that smaller numbers use fewer bytes.
+ */
+class VarInt {
+  private:
+	std::uint64_t m_Value;
+
+  public:
+	VarInt() : m_Value(0) {}
+	/**
+	 * \brief Construct a variable integer from a value
+	 * \param value The value of the variable integer
+	 */
+	VarInt(std::uint64_t value) : m_Value(value) {}
+
+	/**
+	 * \brief Get the value of the variable integer
+	 */
+	std::uint64_t GetValue() const {
+		return m_Value;
+	}
+
+	/**
+	 * \brief Get the length of the serialized variable integer
+	 */
+	std::size_t GetSerializedLength() const;
+
+	/**
+	 * \brief Serialize the variable integer
+	 * \param out The buffer to write the serialized variable integer to
+	 * \param var The variable integer to serialize
+	 */
+	friend DataBuffer& operator<<(DataBuffer& out, const VarInt& var);
+
+	/**
+	 * \brief Deserialize the variable integer
+	 * \param in The buffer to read the serialized variable integer from
+	 * \param var The variable integer to deserialize
+	 */
+	friend DataBuffer& operator>>(DataBuffer& in, VarInt& var);
+};
+
+}  // namespace sp

include/sp/misc/Format.h

@@ -0,0 +1,38 @@
+#pragma once
+
+/**
+ * \file Format.h
+ * \brief This file contains the definition of the `Format` function.
+ */
+
+#include <memory>
+#include <stdexcept>
+#include <string>
+
+namespace sp {
+namespace utils {
+
+/**
+ * \brief Formats a string using a format string and variadic arguments.
+ *
+ * This function takes a format string and a variable number of arguments and returns a formatted string.
+ * The format string can contain placeholders that will be replaced by the corresponding arguments.
+ *
+ * \param format The format string.
+ * \param args The variadic arguments to be formatted.
+ * \return The formatted string.
+ * \throws std::runtime_error if an error occurs during formatting.
+ */
+template <typename... Args>
+std::string Format(const std::string& format, Args... args) {
+	int size = snprintf(nullptr, 0, format.c_str(), args...) + 1;  // Extra space for '\0'
+	if (size <= 0) {
+		throw std::runtime_error("Error during formatting.");
+	}
+	std::unique_ptr<char[]> buf(new char[size]);
+	snprintf(buf.get(), static_cast<std::size_t>(size), format.c_str(), args...);
+	return std::string(buf.get(), buf.get() + size - 1);  // We don't want the '\0' inside
+}
+
+}  // namespace utils
+}  // namespace sp

include/sp/misc/Log.h

@@ -0,0 +1,32 @@
+#pragma once
+
+/**
+ * \file Log.h
+ * \brief File defining log functions
+ */
+
+#include <string>
+
+namespace sp {
+namespace utils {
+
+/**
+ * \brief Logs a normal message.
+ * \param msg The message to be logged.
+ */
+void LOG(const std::string& msg);
+
+/**
+ * \brief Logs a normal message in debug mode.
+ * \param msg The message to be logged.
+ */
+void LOGD(const std::string& msg);
+
+/**
+ * \brief Logs an error message.
+ * \param err The error message to be logged.
+ */
+void LOGE(const std::string& err);
+
+}  // namespace utils
+}  // namespace sp

include/sp/misc/Test.h

@@ -0,0 +1,70 @@
+#pragma once
+
+/**
+ * \file Test.h
+ * \brief File containing unit testing utilities
+ */
+
+#include <cstdlib>
+#include <sp/misc/Log.h>
+
+namespace sp {
+namespace test {
+
+/**
+ * \def SP_TEST_SUCCESSFUL
+ * \brief Used in tests to indicate that a test was successful
+ */
+#define SP_TEST_SUCCESSFUL 0
+
+/**
+ * \def SP_TEST_FAILED
+ * \brief Used in tests to indicate that a test failed
+ */
+#define SP_TEST_FAILED 1
+
+#ifndef __FUNCTION_NAME__
+#ifdef _WIN32
+#define __FUNCTION_NAME__ __FUNCTION__
+#else
+#define __FUNCTION_NAME__ __PRETTY_FUNCTION__
+#endif
+#endif
+
+/**
+ * \def blitz_test_assert
+ * \param ... The expression to evaluate
+ * \brief Evaluates the expression and exits the program if not valid.
+ * \note It works like a basic assert() but also in release mode
+ */
+#define sp_test_assert(...)                                                                                                           \
+	if (!static_cast<bool>(__VA_ARGS__)) {                                                                                            \
+		td::test::LogAssert(#__VA_ARGS__, __FILE__, __LINE__, __FUNCTION_NAME__);                                                     \
+		std::exit(SP_TEST_FAILED);                                                                                                    \
+	}
+
+
+/**
+ * \def blitz_debug_assert
+ * \param ... The expression to execute
+ * \brief Assertion without checks in release mode
+ * \note The expression is always executed. However, in release, no checks are made !
+ */
+#ifdef NDEBUG
+#define sp_debug_assert(...) __VA_ARGS__
+#else
+#define sp_debug_assert sp_test_assert
+#endif
+
+
+/**
+ * \brief Prints an error message associated with a failed assertion
+ * \param expression The expression that was tested
+ * \param file The file in which the assertion failed
+ * \param line The line in the file in which the assertion failed
+ * \param function The function in which the assertion failed
+ */
+void LogAssert(const char* expression, const char* file, int line, const char* function);
+
+}  // namespace test
+}  // namespace sp

include/sp/protocol/Dispatcher.h

@@ -0,0 +1,61 @@
+#pragma once
+
+/**
+ * \file PacketDispatcher.h
+ * \brief File containing the sp::protocol::PacketDispatcher class
+ */
+
+#include <sp/common/NonCopyable.h>
+#include <sp/protocol/packet/Packets.h>
+
+#include <map>
+
+namespace sp {
+namespace protocol {
+
+/**
+ * \class Dispatcher
+ * \brief Class used to dispatch things
+ */
+template <typename T_Enum, typename T_Handler, typename T>
+class Dispatcher : private NonCopyable {
+  private:
+	std::map<T_Enum, std::vector<T_Handler*>> m_Handlers;
+
+  public:
+	/**
+	 * \brief Constructor
+	 */
+	Dispatcher() {}
+
+	/**
+	 * \brief Dispatch a packet
+	 * \param packet The packet to dispatch
+	 */
+	void Dispatch(const T& packet);
+
+	/**
+	 * \brief Register a packet handler
+	 * \param type The packet type
+	 * \param handler The packet handler
+	 */
+	void RegisterHandler(T_Enum type, T_Handler& handler);
+
+	/**
+	 * \brief Unregister a packet handler
+	 * \param type The packet type
+	 * \param handler The packet handler
+	 */
+	void UnregisterHandler(T_Enum type, T_Handler& handler);
+
+	/**
+	 * \brief Unregister a packet handler
+	 * \param handler The packet handler
+	 */
+	void UnregisterHandler(T_Handler& handler);
+};
+
+}  // namespace protocol
+}  // namespace sp
+
+#include "Dispatcher.inl"

include/sp/protocol/Dispatcher.inl

@@ -0,0 +1,38 @@
+#pragma once
+
+namespace sp {
+namespace protocol {
+
+template <typename T_Enum, typename T_Handler, typename T>
+void Dispatcher<T_Enum, T_Handler, T>::Dispatch(const T& packet) {
+	T_Enum type = packet.GetType();
+	for (auto* handler : m_Handlers[type])
+		handler->Check(packet);
+}
+
+template <typename T_Enum, typename T_Handler, typename T>
+void Dispatcher<T_Enum, T_Handler, T>::RegisterHandler(T_Enum type, T_Handler& handler) {
+	auto found = std::find(m_Handlers[type].begin(), m_Handlers[type].end(), &handler);
+	if (found == m_Handlers[type].end())
+		m_Handlers[type].push_back(&handler);
+}
+
+template <typename T_Enum, typename T_Handler, typename T>
+void Dispatcher<T_Enum, T_Handler, T>::UnregisterHandler(T_Enum type, T_Handler& handler) {
+	m_Handlers[type].erase(std::remove(m_Handlers[type].begin(), m_Handlers[type].end(), &handler), m_Handlers[type].end());
+}
+
+template <typename T_Enum, typename T_Handler, typename T>
+void Dispatcher<T_Enum, T_Handler, T>::UnregisterHandler(T_Handler& handler) {
+	for (auto& pair : m_Handlers) {
+		if (pair.second.empty())
+			continue;
+
+		PacketType type = pair.first;
+
+		m_Handlers[type].erase(std::remove(m_Handlers[type].begin(), m_Handlers[type].end(), &handler), m_Handlers[type].end());
+	}
+}
+
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/command/CommandData.h

@@ -0,0 +1,53 @@
+// #pragma once
+
+// #include <array>
+// #include <string>
+// #include <sp/Types.h>
+
+// namespace sp {
+// namespace protocol {
+
+// namespace cdata {
+
+
+// struct PlaceTower {
+// 	TowerType m_Type : 4;
+// 	PlayerID m_Placer : 4;
+// 	TowerCoords m_Position;
+// };
+
+// struct UpgradeTower {
+// 	TowerID m_Tower : 12;
+// 	std::uint8_t m_Upgrade : 4;
+// };
+
+// struct SpawnTroop {
+// 	EntityType m_Type : 5;
+// 	std::uint8_t m_Level : 3;
+// 	EntityCoords m_Position;
+// 	PlayerID m_Sender;
+// };
+
+// struct UseItem {
+// 	ShopItem m_Item : 4;
+// 	PlayerID m_User : 4;
+// 	EntityCoords m_Position;
+// };
+
+// struct TeamChange {
+// 	PlayerID m_Player : 7;
+// 	Team m_NewTeam : 1;
+// };
+
+// struct PlayerJoin {
+// 	PlayerID m_ID;
+// 	std::string m_Name;
+// };
+
+// struct End {};
+
+// }  // namespace cdata
+
+
+// }  // namespace protocol
+// }  // namespace sp

include/sp/protocol/command/CommandDeclare.h

@@ -0,0 +1,22 @@
+#pragma once
+
+
+namespace sp {
+namespace protocol {
+
+/**
+ * \def DeclareAllPacket
+ * \brief Avoids repetitive operations on commands
+ */
+#define DeclareAllCommand() \
+	DeclareCommand(End) \
+	DeclareCommand(PlaceTower) \
+	DeclareCommand(PlayerJoin) \
+	DeclareCommand(SpawnTroop) \
+	DeclareCommand(TeamChange) \
+	DeclareCommand(UpgradeTower) \
+	DeclareCommand(UseItem)
+
+
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/command/CommandDispatcher.h

@@ -0,0 +1,17 @@
+#pragma once
+
+/**
+ * \file CommandDispatcher.h
+ * \brief File containing the sp::protocol::CommandDispatcher class
+ */
+
+#include <sp/protocol/Dispatcher.h>
+#include <sp/protocol/command/Commands.h>
+
+namespace sp {
+namespace protocol {
+
+using CommandDispatcher = Dispatcher<CommandType, CommandVisitor, Command>;
+
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/command/CommandFactory.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <memory>
+#include <sp/protocol/command/Commands.h>
+
+namespace sp {
+namespace protocol {
+namespace CommandFactory {
+
+template <typename CommandDerived, typename = typename std::enable_if<std::is_base_of<Command, CommandDerived>::value>::type>
+std::shared_ptr<CommandDerived> CreateCommand() {
+	return std::make_shared<CommandDerived>();
+}
+
+const std::shared_ptr<Command>& CreateReadOnlyCommand(CommandType a_Type);
+
+}  // namespace CommandFactory
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/command/CommandSerializer.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <memory>
+#include <sp/common/DataBuffer.h>
+
+namespace sp {
+namespace protocol {
+
+class Command;
+
+using CommandPtr = std::shared_ptr<Command>;
+
+namespace CommandSerializer {
+
+DataBuffer Serialize(const Command& a_Command);
+
+std::shared_ptr<Command> Deserialize(DataBuffer& a_Data);
+
+}  // namespace CommandSerializer
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/command/CommandVisitor.h

@@ -0,0 +1,39 @@
+#pragma once
+
+/**
+ * \file CommandVisitor.h
+ * \brief File containing the sp::protocol::CommandVisitor class
+ */
+
+#include <sp/protocol/command/Commands.h>
+
+namespace sp {
+namespace protocol {
+
+#define DeclareCommand(CommandName, ...)                                                                                              \
+	/** This function is called when the packet processed by CommandVisitor::Check is a CommandName */                                \
+	virtual void Visit(const commands::CommandName&) {}
+
+/**
+ * \class CommandVisitor
+ * \brief This class uses double-dispatch in order to find the real type of a packet
+ */
+class CommandVisitor : private NonCopyable {
+  protected:
+	CommandVisitor() {}
+	virtual ~CommandVisitor() {}
+
+  public:
+	/**
+	 * \brief Calls the right CommandVisitor::Visit method corresponding to the real type of the packet
+	 * \param packet the Command to visit
+	 */
+	void Check(const Command& packet);
+
+	DeclareAllCommand()
+};
+
+#undef DeclareCommand
+
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/command/Commands.h

@@ -0,0 +1,111 @@
+#pragma once
+
+/**
+ * \file Commands.h
+ * \brief File containing the definitions of the lockstep commands
+ */
+
+#include <sp/Types.h>
+#include <sp/common/NonCopyable.h>
+#include <sp/protocol/command/CommandData.h>
+#include <sp/protocol/command/CommandDeclare.h>
+#include <memory>
+
+namespace sp {
+namespace protocol {
+
+class CommandVisitor;
+
+/** A Command id is 8 bits wide */
+using CommandID = std::uint8_t;
+
+#define DeclareCommand(CommandName, ...) /** CommandName */ CommandName,
+
+/**
+ * \enum CommandType
+ * \brief Map a Command to an id
+ */
+enum class CommandType : CommandID {
+
+	DeclareAllCommand()
+
+	/** The number of Commands */
+	COMMAND_COUNT
+};
+
+
+#undef DeclareCommand
+
+
+class Command : private NonCopyable {
+  public:
+	/**
+	 * \return The real type of the Command
+	 */
+	virtual CommandType GetType() const = 0;
+
+  private:
+	/** Use a CommandVisitor to make double-dispatch possible */
+	virtual void Accept(CommandVisitor& a_Visitor) const = 0;
+
+	friend class CommandVisitor;
+};
+
+
+
+
+
+namespace commands {
+
+/**
+ * \class ConcreteCommand
+ * \brief A Command associated with an id and holding data
+ * \tparam PT The Command type
+ * \tparam Data The structure holding the data of the Command (in sp::protocol::data namespace)
+ */
+template <CommandType CT, typename Data>
+class ConcreteCommand : public Command {
+  public:
+	/** The type of the struct holding the data */
+	using CommandDataType = Data;
+
+	/** The structure holding the actual data */
+	CommandDataType m_Data;
+
+	/** Construct the Command with data of type CommandDataType */
+	ConcreteCommand(const CommandDataType& a_Data = {});
+
+	constexpr CommandType GetType() const override {
+		return CT;
+	};
+
+  private:
+	void Accept(CommandVisitor& a_Visitor) const override;
+};
+
+
+
+
+
+// define SP_INSTANCIATE_COMMANDS
+// before including this file
+// if you want to instantiate templates
+#ifdef SP_INSTANCIATE_COMMANDS
+#define DeclareCommand(CommandName, ...)                                                                                              \
+	using CommandName = ConcreteCommand<CommandType::CommandName, cdata::CommandName>;                                                \
+	template class ConcreteCommand<CommandType::CommandName, cdata::CommandName>;
+#else
+#define DeclareCommand(CommandName, ...) /** Defines the CommandName Command */                                                       \
+	using CommandName = ConcreteCommand<CommandType::CommandName, cdata::CommandName>;
+#endif
+
+DeclareAllCommand()
+
+#undef DeclareCommand
+
+}  // namespace commands
+
+using LockStep = std::vector<std::shared_ptr<protocol::Command>>;
+
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/packet/PacketData.h

@@ -0,0 +1,76 @@
+// #pragma once
+
+// #include <td/Types.h>
+// #include <vector>
+// #include <td/protocol/command/Commands.h>
+
+// // Make it dynamic ?
+// #define LOCKSTEP_BUFFER_SIZE 10
+
+// namespace sp {
+// namespace protocol {
+
+// struct PlayerInfo {
+// 	PlayerID m_PlayerId;
+// 	std::string m_PlayerName;
+// };
+
+// struct MapData {
+
+// };
+
+// namespace pdata {
+
+// /** Client attempts to login (very basic) */
+// struct PlayerLogin {
+// 	std::string m_PlayerName;
+// };
+
+// /** Server indicates success */
+// struct LoggingSuccess {
+// 	PlayerID m_PlayerId;
+// };
+
+// /** Player joins the lobby */
+// struct PlayerJoin {
+// 	PlayerInfo m_Player;
+// };
+
+// /** Player leaves the lobby */
+// struct PlayerLeave {
+// 	PlayerID m_PlayerId;
+// };
+
+// /** Keep alive */
+// struct KeepAlive {
+// 	std::uint64_t m_KeepAliveId;
+// };
+
+// /** Can be used by both client and server */
+// struct Disconnect {
+// 	std::string m_Reason;
+// };
+
+// /** Chat message */
+// struct ChatMessage {
+// 	std::string m_Text;
+// };
+
+// // TODO: handle players joining in the first second
+
+// struct BeginGame {
+// 	MapData m_Map;
+// 	std::vector<PlayerInfo> m_BlueTeam;
+// 	std::vector<PlayerInfo> m_RedTeam;
+// 	// optional, used for players joining mid game
+// 	std::vector<LockStep> m_FirstLocksteps;
+// };
+
+// struct LockSteps {
+// 	std::uint16_t m_FirstFrameNumber;
+// 	std::array<LockStep, LOCKSTEP_BUFFER_SIZE> m_LockSteps;
+// };
+
+// }  // namespace pdata
+// }  // namespace protocol
+// }  // namespace sp

include/sp/protocol/packet/PacketDeclare.h

@@ -0,0 +1,48 @@
+// #pragma once
+
+// /**
+//  * \file PacketDeclare.h
+//  * \brief Holds the definitions of the packets (but not their content)
+//  */
+
+// namespace sp {
+// namespace protocol {
+
+// /**
+//  * \enum PacketSender
+//  * \brief Indicate who should send a packet
+//  */
+// enum class PacketSenderType {
+// 	/** Sent by clients and server */
+// 	Both = 1,
+// 	/** Sent by clients to the server */
+// 	Client,
+// 	/** Sent by server to the clients */
+// 	Server,
+// };
+
+// enum class PacketSendType {
+// 	Reliable = 1,
+// 	Unreliable,
+// 	UnreliableOrdered,
+// };
+
+
+// /**
+//  * \def DeclareAllPacket
+//  * \brief Avoids repetitive operations on packets
+//  */
+// #define DeclareAllPacket() \
+// 	DeclarePacket(ChatMessage, Reliable, Both) \
+// 	DeclarePacket(BeginGame, Reliable, Server) \
+// 	DeclarePacket(Disconnect, Reliable, Both) \
+// 	DeclarePacket(KeepAlive, Reliable, Both)  \
+// 	DeclarePacket(LockSteps, Unreliable, Both)  \
+// 	DeclarePacket(LoggingSuccess, Reliable, Server) \
+// 	DeclarePacket(PlayerJoin, Reliable, Server) \
+// 	DeclarePacket(PlayerLeave, Reliable, Server) \
+// 	DeclarePacket(PlayerLogin, Reliable, Client) \
+
+
+// }  // namespace protocol
+// }  // namespace sp

include/sp/protocol/packet/PacketDispatcher.h

@@ -0,0 +1,17 @@
+#pragma once
+
+/**
+ * \file PacketDispatcher.h
+ * \brief File containing the sp::protocol::PacketDispatcher class
+ */
+
+#include <sp/protocol/Dispatcher.h>
+#include <sp/protocol/packet/Packets.h>
+
+namespace sp {
+namespace protocol {
+
+using PacketDispatcher = Dispatcher<PacketType, PacketVisitor, Packet>;
+
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/packet/PacketFactory.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <memory>
+#include <sp/protocol/packet/Packets.h>
+
+namespace sp {
+namespace protocol {
+namespace PacketFactory {
+
+template <typename PacketDerived, typename = typename std::enable_if<std::is_base_of<Packet, PacketDerived>::value>::type>
+std::unique_ptr<PacketDerived> CreatePacket() {
+	return std::make_unique<PacketDerived>();
+}
+
+const std::unique_ptr<Packet>& CreateReadOnlyPacket(PacketType a_Type);
+
+}  // namespace PacketFactory
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/packet/PacketSerializer.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <memory>
+#include <sp/common/DataBuffer.h>
+
+namespace sp {
+namespace protocol {
+
+class Packet;
+
+using PacketPtr = std::unique_ptr<Packet>;
+
+namespace PacketSerializer {
+
+DataBuffer Serialize(const Packet& a_Packet);
+
+std::unique_ptr<Packet> Deserialize(DataBuffer& a_Data);
+
+}  // namespace PacketSerializer
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/packet/PacketVisitor.h

@@ -0,0 +1,39 @@
+#pragma once
+
+/**
+ * \file PacketVisitor.h
+ * \brief File containing the sp::protocol::PacketVisitor class
+ */
+
+#include <sp/protocol/packet/Packets.h>
+
+namespace sp {
+namespace protocol {
+
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	/** This function is called when the packet processed by PacketVisitor::Check is a PacketName */                                  \
+	virtual void Visit(const packets::PacketName&) {}
+
+/**
+ * \class PacketVisitor
+ * \brief This class uses double-dispatch in order to find the real type of a packet
+ */
+class PacketVisitor : private NonCopyable {
+  protected:
+	PacketVisitor() {}
+	virtual ~PacketVisitor() {}
+
+  public:
+	/**
+	 * \brief Calls the right PacketVisitor::Visit method corresponding to the real type of the packet
+	 * \param packet the Packet to visit
+	 */
+	void Check(const Packet& packet);
+
+	DeclareAllPacket()
+};
+
+#undef DeclarePacket
+
+}  // namespace protocol
+}  // namespace sp

include/sp/protocol/packet/Packets.h

@@ -0,0 +1,115 @@
+#pragma once
+
+/**
+ * \file Packets.h
+ * \brief File containing the definitions of the packets
+ */
+
+#include <sp/common/NonCopyable.h>
+#include <sp/protocol/packet/PacketData.h>
+#include <sp/protocol/packet/PacketDeclare.h>
+
+#include <cstdint>
+
+namespace sp {
+namespace protocol {
+
+class PacketVisitor;
+
+/** A Packet id is 8 bits wide */
+using PacketID = std::uint8_t;
+using PeerID = std::uint16_t;
+
+#define DeclarePacket(PacketName, ...) /** PacketName */ PacketName,
+
+/**
+ * \enum PacketType
+ * \brief Map a Packet to an id
+ */
+enum class PacketType : PacketID {
+
+	DeclareAllPacket()
+
+	/** The number of packets */
+	PACKET_COUNT
+};
+
+
+#undef DeclarePacket
+
+
+class Packet : private NonCopyable {
+  public:
+	/**
+	 * \return The real type of the packet
+	 */
+	virtual PacketType GetType() const = 0;
+
+	/**
+	 * \brief The network peer who sent the packet
+	 */
+	PeerID m_Sender;
+
+  private:
+	/** Use a PacketVisitor to make double-dispatch possible */
+	virtual void Accept(PacketVisitor& a_Visitor) const = 0;
+
+	friend class PacketVisitor;
+};
+
+
+
+
+
+namespace packets {
+
+/**
+ * \class ConcretePacket
+ * \brief A Packet associated with an id and holding data
+ * \tparam PT The packet type
+ * \tparam Data The structure holding the data of the packet (in sp::protocol::data namespace)
+ */
+template <PacketType PT, typename Data>
+class ConcretePacket : public Packet {
+  public:
+	/** The type of the struct holding the data */
+	using PacketDataType = Data;
+
+	/** The structure holding the actual data */
+	PacketDataType m_Data;
+
+	/** Construct the packet with data of type PacketDataType */
+	ConcretePacket(const PacketDataType& a_Data = {});
+
+	constexpr PacketType GetType() const override {
+		return PT;
+	};
+
+  private:
+	void Accept(PacketVisitor& a_Visitor) const override;
+};
+
+
+
+
+
+// define SP_INSTANCIATE_PACKETS
+// before including this file
+// if you want to instantiate templates
+#ifdef SP_INSTANCIATE_PACKETS
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	using PacketName = ConcretePacket<PacketType::PacketName, pdata::PacketName>;                                                     \
+	template class ConcretePacket<PacketType::PacketName, pdata::PacketName>;
+#else
+#define DeclarePacket(PacketName, ...) /** Defines the PacketName packet */                                                           \
+	using PacketName = ConcretePacket<PacketType::PacketName, pdata::PacketName>;
+#endif
+
+// DeclareAllPacket()
+
+#undef DeclarePacket
+
+}  // namespace packets
+
+}  // namespace protocol
+}  // namespace sp

src/main.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+// #include <sp/protocol/packet/PacketVisitor.h>
+#include <sp/game/GameHistory.h>
+#include <sp/protocol/command/CommandDispatcher.h>
+#include <sp/protocol/command/CommandFactory.h>
+#include <sp/protocol/command/CommandSerializer.h>
+#include <sp/protocol/command/CommandVisitor.h>
+
+class Test : public sp::protocol::CommandVisitor {};
+
+int main(int argc, char** argv) {
+	// Test visitor;
+	// sp::protocol::packets::ChatMessage chat{{"coucou"}};
+	// visitor.Check(chat);
+
+
+	td::protocol::commands::UpgradeTower com{{1, 2}};
+	std::cout << (unsigned)com.GetType() << std::endl;
+	td::protocol::CommandDispatcher disptacher;
+	return 0;
+}

src/sp/common/DataBuffer.cpp

@@ -0,0 +1,163 @@
+#include <sp/common/DataBuffer.h>
+
+#include <fstream>
+#include <iomanip>
+#include <sstream>
+
+#include <sp/misc/Format.h>
+#include <sp/misc/Log.h>
+
+namespace sp {
+
+DataBuffer::DataBuffer() : m_ReadOffset(0) {}
+
+DataBuffer::DataBuffer(const DataBuffer& other) : m_Buffer(other.m_Buffer), m_ReadOffset(other.m_ReadOffset) {}
+
+DataBuffer::DataBuffer(DataBuffer&& other) : m_Buffer(std::move(other.m_Buffer)), m_ReadOffset(std::move(other.m_ReadOffset)) {}
+
+DataBuffer::DataBuffer(const std::string& str) : m_Buffer(str.begin(), str.end()), m_ReadOffset(0) {}
+
+DataBuffer::DataBuffer(const DataBuffer& other, Data::difference_type offset) : m_ReadOffset(0) {
+	m_Buffer.reserve(other.GetSize() - static_cast<std::size_t>(offset));
+	std::copy(other.m_Buffer.begin() + offset, other.m_Buffer.end(), std::back_inserter(m_Buffer));
+}
+
+DataBuffer& DataBuffer::operator<<(const std::string& str) {
+	std::size_t strlen = str.length() + 1;	// including null character
+	Resize(GetSize() + strlen);
+	std::memcpy(m_Buffer.data() + GetSize() - strlen, str.data(), strlen);
+	return *this;
+}
+
+DataBuffer& DataBuffer::operator<<(const DataBuffer& data) {
+	m_Buffer.insert(m_Buffer.end(), data.begin(), data.end());
+	return *this;
+}
+
+DataBuffer& DataBuffer::operator>>(std::string& str) {
+	std::size_t stringSize = strlen(reinterpret_cast<const char*>(m_Buffer.data()) + m_ReadOffset) + 1;	 // including null character
+	str.resize(stringSize);
+	std::copy(m_Buffer.begin() + static_cast<difference_type>(m_ReadOffset),
+		m_Buffer.begin() + static_cast<difference_type>(m_ReadOffset + stringSize), str.begin());
+	m_ReadOffset += stringSize;
+	str.resize(stringSize - 1);
+	return *this;
+}
+
+DataBuffer& DataBuffer::operator>>(DataBuffer& data) {
+	data.Resize(GetSize() - m_ReadOffset);
+	std::copy(m_Buffer.begin() + static_cast<difference_type>(m_ReadOffset), m_Buffer.end(), data.begin());
+	m_ReadOffset = m_Buffer.size();
+	return *this;
+}
+
+void DataBuffer::WriteSome(const char* buffer, std::size_t amount) {
+	std::size_t end_pos = m_Buffer.size();
+	m_Buffer.resize(m_Buffer.size() + amount);
+	std::memcpy(m_Buffer.data() + end_pos, buffer, amount);
+}
+
+void DataBuffer::WriteSome(const std::uint8_t* buffer, std::size_t amount) {
+	std::size_t end_pos = m_Buffer.size();
+	m_Buffer.resize(m_Buffer.size() + amount);
+	std::memcpy(m_Buffer.data() + end_pos, buffer, amount);
+}
+
+void DataBuffer::ReadSome(char* buffer, std::size_t amount) {
+	assert(m_ReadOffset + amount <= GetSize());
+	std::copy_n(m_Buffer.begin() + static_cast<difference_type>(m_ReadOffset), amount, buffer);
+	m_ReadOffset += amount;
+}
+
+
+void DataBuffer::ReadSome(std::uint8_t* buffer, std::size_t amount) {
+	assert(m_ReadOffset + amount <= GetSize());
+	std::copy_n(m_Buffer.begin() + static_cast<difference_type>(m_ReadOffset), amount, buffer);
+	m_ReadOffset += amount;
+}
+
+
+void DataBuffer::ReadSome(DataBuffer& buffer, std::size_t amount) {
+	assert(m_ReadOffset + amount <= GetSize());
+	buffer.Resize(amount);
+	std::copy_n(m_Buffer.begin() + static_cast<difference_type>(m_ReadOffset), amount, buffer.begin());
+	m_ReadOffset += amount;
+}
+
+
+DataBuffer& DataBuffer::operator=(const DataBuffer& other) {
+	m_Buffer = other.m_Buffer;
+	m_ReadOffset = other.m_ReadOffset;
+	return *this;
+}
+
+DataBuffer& DataBuffer::operator=(DataBuffer&& other) {
+	m_Buffer = std::move(other.m_Buffer);
+	m_ReadOffset = std::move(other.m_ReadOffset);
+	return *this;
+}
+
+void DataBuffer::SetReadOffset(std::size_t pos) {
+	assert(pos <= GetSize());
+	m_ReadOffset = pos;
+}
+
+std::size_t DataBuffer::GetSize() const {
+	return m_Buffer.size();
+}
+
+std::size_t DataBuffer::GetRemaining() const {
+	return m_Buffer.size() - m_ReadOffset;
+}
+
+DataBuffer::iterator DataBuffer::begin() {
+	return m_Buffer.begin();
+}
+
+DataBuffer::iterator DataBuffer::end() {
+	return m_Buffer.end();
+}
+
+DataBuffer::const_iterator DataBuffer::begin() const {
+	return m_Buffer.begin();
+}
+
+DataBuffer::const_iterator DataBuffer::end() const {
+	return m_Buffer.end();
+}
+
+std::ostream& operator<<(std::ostream& os, const DataBuffer& buffer) {
+	for (unsigned char u : buffer)
+		os << std::hex << std::setfill('0') << std::setw(2) << static_cast<int>(u) << " ";
+	os << std::dec;
+	return os;
+}
+
+bool DataBuffer::ReadFile(const std::string& fileName) {
+	try {
+		std::ifstream file(fileName, std::istream::binary);
+		std::ostringstream ss;
+		ss << file.rdbuf();
+		const std::string& s = ss.str();
+		m_Buffer = DataBuffer::Data(s.begin(), s.end());
+		m_ReadOffset = 0;
+	} catch (std::exception& e) {
+		utils::LOGE(utils::Format("[IO] Failed to read file %s ! reason : %s", fileName.c_str(), e.what()));
+		return false;
+	}
+	return m_Buffer.size() > 0;
+}
+
+bool DataBuffer::WriteFile(const std::string& fileName) const {
+	try {
+		std::ofstream file(fileName, std::ostream::binary);
+		file.write(reinterpret_cast<const char*>(m_Buffer.data()), static_cast<std::streamsize>(m_Buffer.size()));
+		file.flush();
+	} catch (std::exception& e) {
+		utils::LOGE(utils::Format("[IO] Failed to read file %s ! reason : %s", fileName.c_str(), e.what()));
+		return false;
+	}
+	return true;
+}
+
+}  // namespace sp

src/sp/common/VarInt.cpp

@@ -0,0 +1,52 @@
+#include <sp/common/VarInt.h>
+
+#include <stdexcept>
+#include <sp/common/DataBuffer.h>
+
+namespace sp {
+
+static constexpr int SEGMENT_BITS = 0x7F;
+static constexpr int CONTINUE_BIT = 0x80;
+
+std::size_t VarInt::GetSerializedLength() const {
+	DataBuffer buffer;
+	buffer << *this;
+	return buffer.GetSize();
+}
+
+DataBuffer& operator<<(DataBuffer& out, const VarInt& var) {
+	std::uint64_t value = var.m_Value;
+	while (true) {
+		if ((value & ~static_cast<std::uint64_t>(SEGMENT_BITS)) == 0) {
+			out << static_cast<std::uint8_t>(value);
+			return out;
+		}
+
+		out << static_cast<std::uint8_t>((value & SEGMENT_BITS) | CONTINUE_BIT);
+
+		value >>= 7;
+	}
+}
+
+DataBuffer& operator>>(DataBuffer& in, VarInt& var) {
+	var.m_Value = 0;
+	unsigned int position = 0;
+	std::uint8_t currentByte;
+
+	while (true) {
+		in.ReadSome(&currentByte, 1);
+		var.m_Value |= static_cast<std::uint64_t>(currentByte & SEGMENT_BITS) << position;
+
+		if ((currentByte & CONTINUE_BIT) == 0)
+			break;
+
+		position += 7;
+
+		if (position >= 8 * sizeof(var.m_Value))
+			throw std::runtime_error("VarInt is too big");
+	}
+
+	return in;
+}
+
+}  // namespace sp

src/sp/misc/Log.cpp

@@ -0,0 +1,37 @@
+#include <sp/misc/Log.h>
+
+
+
+#ifdef SP_ANDROID_LOGGING
+#include <android/log.h>
+#else
+#include <iostream>
+#endif
+
+namespace sp {
+namespace utils {
+
+void LOG(const std::string& msg) {
+#ifdef SP_ANDROID_LOGGING
+	__android_log_print(ANDROID_LOG_INFO, "TRACKERS", "%s", msg.c_str());
+#else
+	std::cout << msg << "\n";
+#endif
+}
+
+void LOGD(const std::string& msg) {
+#if !defined(NDEBUG)
+	LOG(msg);
+#endif
+}
+
+void LOGE(const std::string& err) {
+#ifdef SP_ANDROID_LOGGING
+	__android_log_print(ANDROID_LOG_ERROR, "TRACKERS", "%s", err.c_str());
+#else
+	std::cerr << err << "\n";
+#endif
+}
+
+}  // namespace utils
+}  // namespace sp

src/sp/misc/Test.cpp

@@ -0,0 +1,14 @@
+#include <sp/misc/Format.h>
+#include <sp/misc/Log.h>
+#include <sp/misc/Test.h>
+
+namespace sp {
+namespace test {
+
+void LogAssert(const char* expression, const char* file, int line, const char* function) {
+	utils::LOGE(utils::Format("%s:%i: %s: Assertion failed !", file, line, function));
+	utils::LOGE(utils::Format("    %i  |\t%s;", line, expression));
+}
+
+}  // namespace test
+}  // namespace sp

src/sp/protocol/command/CommandFactory.cpp

@@ -0,0 +1,24 @@
+#include <sp/protocol/command/CommandFactory.h>
+
+#include <array>
+#include <cassert>
+#include <functional>
+
+namespace sp {
+namespace protocol {
+namespace CommandFactory {
+
+using CommandCreator = std::function<std::shared_ptr<Command>()>;
+
+#define DeclareCommand(CommandName, ...) std::make_shared<commands::CommandName>(),
+
+static std::array<std::shared_ptr<Command>, static_cast<std::size_t>(CommandType::COMMAND_COUNT)> Commands = {DeclareAllCommand()};
+
+const std::shared_ptr<Command>& CreateReadOnlyCommand(CommandType a_Type) {
+	assert(a_Type < CommandType::COMMAND_COUNT);
+	return Commands[static_cast<std::size_t>(a_Type)];
+}
+
+}  // namespace CommandFactory
+}  // namespace protocol
+}  // namespace sp

src/sp/protocol/command/CommandSerializer.cpp

@@ -0,0 +1,229 @@
+#include <sp/protocol/command/CommandSerializer.h>
+
+#include <sp/protocol/command/CommandFactory.h>
+#include <sp/protocol/command/CommandVisitor.h>
+
+#include <sp/misc/Format.h>
+#include <sp/misc/Log.h>
+
+namespace sp {
+namespace protocol {
+namespace CommandSerializer {
+
+#define DeclareCommand(CommandName, ...)                                                                                              \
+	void Visit(const commands::CommandName& a_Command) override {                                                                     \
+		const auto& commandData = a_Command.m_Data;                                                                                   \
+		SerializeCommandData(commandData);                                                                                            \
+	}                                                                                                                                 \
+                                                                                                                                      \
+	void SerializeCommandData(const commands::CommandName::CommandDataType& a_Command);
+
+
+
+
+class Serializer : public CommandVisitor {
+  private:
+	DataBuffer& m_Buffer;
+
+  public:
+	Serializer(DataBuffer& a_Buffer) : m_Buffer(a_Buffer) {}
+
+	void Serialize(const Command& a_Command) {
+		m_Buffer << static_cast<CommandID>(a_Command.GetType());
+		Check(a_Command);
+	}
+
+	DeclareAllCommand()
+};
+
+#undef DeclareCommand
+
+
+
+
+
+#define DeclareCommand(CommandName, ...)                                                                                              \
+	void Visit(const commands::CommandName& a_Command) override {                                                                     \
+		auto commandPtr = CommandFactory::CreateCommand<commands::CommandName>();                                                     \
+		auto& commandData = commandPtr->m_Data;                                                                                       \
+                                                                                                                                      \
+		DeserializeCommandData(commandData);                                                                                          \
+                                                                                                                                      \
+		m_Command = std::move(commandPtr);                                                                                            \
+	}                                                                                                                                 \
+                                                                                                                                      \
+	void DeserializeCommandData(commands::CommandName::CommandDataType& a_Command);
+
+
+
+class Deserializer : public CommandVisitor {
+  private:
+	DataBuffer& m_Buffer;
+	CommandPtr m_Command;
+
+  public:
+	Deserializer(DataBuffer& a_Buffer) : m_Buffer(a_Buffer) {}
+
+	bool Deserialize(const CommandPtr& a_Command) {
+		try {
+			Check(*a_Command.get());
+		} catch (std::exception& e) {
+			utils::LOGE(utils::Format("[CommandSerializer::Deserializer] %s", e.what()));
+			return false;
+		}
+		return true;
+	}
+
+	CommandPtr& GetCommand() {
+		return m_Command;
+	}
+
+	DeclareAllCommand()
+};
+
+
+
+
+
+DataBuffer Serialize(const Command& a_Command) {
+	DataBuffer buffer;
+
+	Serializer serializer(buffer);
+	serializer.Serialize(a_Command);
+
+	return buffer;
+}
+
+std::shared_ptr<Command> Deserialize(DataBuffer& a_Data) {
+	CommandID commandId;
+	a_Data >> commandId;
+
+	if (commandId >= static_cast<CommandID>(CommandType::COMMAND_COUNT))
+		return nullptr;
+
+	CommandType commandType = CommandType(commandId);
+
+	// for double-dispatch
+	const CommandPtr& emptyCommand = CommandFactory::CreateReadOnlyCommand(commandType);
+
+	Deserializer deserializer(a_Data);
+
+	if (deserializer.Deserialize(emptyCommand)) {
+		CommandPtr command = std::move(deserializer.GetCommand());
+		return command;
+	}
+
+	return nullptr;
+}
+
+
+
+
+
+//---------------------------------------------
+// Command serializer implementation
+//----------------------------------------------
+
+
+
+
+
+void Serializer::SerializeCommandData(const cdata::End& a_Command) {}
+
+void Deserializer::DeserializeCommandData(cdata::End& a_Command) {}
+
+
+
+
+
+void Serializer::SerializeCommandData(const cdata::PlaceTower& a_Command) {
+	m_Buffer << static_cast<std::uint8_t>((static_cast<std::uint8_t>(a_Command.m_Type) << 4 | a_Command.m_Placer & 0xF))
+			 << a_Command.m_Position;
+}
+
+void Deserializer::DeserializeCommandData(cdata::PlaceTower& a_Command) {
+	std::uint8_t union1;
+	m_Buffer >> union1 >> a_Command.m_Position;
+	a_Command.m_Type = sp::TowerType(union1 >> 4);
+	a_Command.m_Placer = union1 & 0xF;
+}
+
+
+
+
+
+void Serializer::SerializeCommandData(const cdata::PlayerJoin& a_Command) {
+	m_Buffer << a_Command.m_ID << a_Command.m_Name;
+}
+
+void Deserializer::DeserializeCommandData(cdata::PlayerJoin& a_Command) {
+	m_Buffer >> a_Command.m_ID >> a_Command.m_Name;
+}
+
+
+
+
+void Serializer::SerializeCommandData(const cdata::SpawnTroop& a_Command) {
+	m_Buffer << static_cast<std::uint8_t>(static_cast<std::uint8_t>(a_Command.m_Type) << 3 | a_Command.m_Level & 0x7)
+			 << a_Command.m_Position << a_Command.m_Sender;
+}
+
+void Deserializer::DeserializeCommandData(cdata::SpawnTroop& a_Command) {
+	std::uint8_t union1;
+	m_Buffer >> union1 >> a_Command.m_Position >> a_Command.m_Sender;
+	a_Command.m_Type = sp::EntityType(union1 >> 3);
+	a_Command.m_Level = union1 & 0x7;
+}
+
+
+
+
+
+void Serializer::SerializeCommandData(const cdata::TeamChange& a_Command) {
+	m_Buffer << static_cast<std::uint8_t>(a_Command.m_Player << 1 | static_cast<std::uint8_t>(a_Command.m_NewTeam));
+}
+
+void Deserializer::DeserializeCommandData(cdata::TeamChange& a_Command) {
+	std::uint8_t union1;
+	m_Buffer >> union1;
+	a_Command.m_Player = union1 >> 1;
+	a_Command.m_NewTeam = sp::Team(union1 & 1);
+}
+
+
+
+
+
+void Serializer::SerializeCommandData(const cdata::UpgradeTower& a_Command) {
+	m_Buffer << static_cast<std::uint16_t>(a_Command.m_Tower << 4 | a_Command.m_Upgrade & 0xF);
+}
+
+void Deserializer::DeserializeCommandData(cdata::UpgradeTower& a_Command) {
+	std::uint16_t union1;
+	m_Buffer >> union1;
+	a_Command.m_Tower = union1 >> 4;
+	a_Command.m_Upgrade = union1 & 0xF;
+}
+
+
+
+
+
+void Serializer::SerializeCommandData(const cdata::UseItem& a_Command) {
+	m_Buffer << static_cast<std::uint8_t>(static_cast<std::uint8_t>(a_Command.m_Item) << 4 | a_Command.m_User & 0xF)
+			 << a_Command.m_Position;
+}
+
+void Deserializer::DeserializeCommandData(cdata::UseItem& a_Command) {
+	std::uint8_t union1;
+	m_Buffer >> union1 >> a_Command.m_Position;
+	a_Command.m_Item = sp::ShopItem(union1 >> 4);
+	a_Command.m_User = union1 & 0xF;
+}
+
+
+
+
+}  // namespace CommandSerializer
+}  // namespace protocol
+}  // namespace sp

src/sp/protocol/command/CommandVisitor.cpp

@@ -0,0 +1,11 @@
+#include <sp/protocol/command/CommandVisitor.h>
+
+namespace sp {
+namespace protocol {
+
+void CommandVisitor::Check(const Command& a_Command) {
+	a_Command.Accept(*this);
+}
+
+}  // namespace protocol
+}  // namespace sp

src/sp/protocol/command/Commands.cpp

@@ -0,0 +1,18 @@
+#define SP_INSTANCIATE_COMMANDS
+#include <sp/protocol/command/Commands.h>
+
+#include <sp/protocol/command/CommandVisitor.h>
+
+namespace sp {
+namespace protocol {
+
+template <CommandType CT, typename Data>
+commands::ConcreteCommand<CT, Data>::ConcreteCommand(const CommandDataType& a_Data) : m_Data(a_Data) {}
+
+template <CommandType CT, typename Data>
+void commands::ConcreteCommand<CT, Data>::Accept(CommandVisitor& a_Visitor) const {
+	a_Visitor.Visit(*this);
+}
+
+}  // namespace protocol
+}  // namespace sp

src/sp/protocol/packet/PacketFactory.cpp

@@ -0,0 +1,26 @@
+#include <sp/protocol/packet/PacketFactory.h>
+
+#include <array>
+#include <cassert>
+#include <functional>
+
+namespace sp {
+namespace protocol {
+namespace PacketFactory {
+
+using PacketCreator = std::function<std::unique_ptr<Packet>()>;
+
+#define DeclarePacket(PacketName, ...) std::make_unique<packets::PacketName>(),
+
+static std::array<std::unique_ptr<Packet>, static_cast<std::size_t>(PacketType::PACKET_COUNT)> Packets = {
+	DeclareAllPacket()
+};
+
+const std::unique_ptr<Packet>& CreateReadOnlyPacket(PacketType a_Type) {
+	assert(a_Type < PacketType::PACKET_COUNT);
+	return Packets[static_cast<std::size_t>(a_Type)];
+}
+
+}  // namespace PacketFactory
+}  // namespace protocol
+}  // namespace sp

src/sp/protocol/packet/PacketSerializer.cpp

@@ -0,0 +1,262 @@
+#include <sp/protocol/packet/PacketSerializer.h>
+
+#include <sp/protocol/command/CommandSerializer.h>
+#include <sp/protocol/packet/PacketFactory.h>
+#include <sp/protocol/packet/PacketVisitor.h>
+
+#include <sp/misc/Format.h>
+#include <sp/misc/Log.h>
+
+namespace sp {
+namespace protocol {
+namespace PacketSerializer {
+
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	void Visit(const packets::PacketName& a_Packet) override {                                                                        \
+		const auto& packetData = a_Packet.m_Data;                                                                                     \
+		SerializePacketData(packetData);                                                                                              \
+	}                                                                                                                                 \
+                                                                                                                                      \
+	void SerializePacketData(const packets::PacketName::PacketDataType& a_Packet);
+
+
+
+
+class Serializer : public PacketVisitor {
+  private:
+	DataBuffer& m_Buffer;
+
+  public:
+	Serializer(DataBuffer& a_Buffer) : m_Buffer(a_Buffer) {}
+
+	void Serialize(const Packet& a_Packet) {
+		m_Buffer << static_cast<PacketID>(a_Packet.GetType());
+		Check(a_Packet);
+	}
+
+	DeclareAllPacket()
+};
+
+#undef DeclarePacket
+
+
+
+
+
+#define DeclarePacket(PacketName, ...)                                                                                                \
+	void Visit(const packets::PacketName& a_Packet) override {                                                                        \
+		auto packetPtr = PacketFactory::CreatePacket<packets::PacketName>();                                                          \
+		auto& packetData = packetPtr->m_Data;                                                                                         \
+                                                                                                                                      \
+		DeserializePacketData(packetData);                                                                                            \
+                                                                                                                                      \
+		m_Packet = std::move(packetPtr);                                                                                              \
+	}                                                                                                                                 \
+                                                                                                                                      \
+	void DeserializePacketData(packets::PacketName::PacketDataType& a_Packet);
+
+
+
+class Deserializer : public PacketVisitor {
+  private:
+	DataBuffer& m_Buffer;
+	PacketPtr m_Packet;
+
+  public:
+	Deserializer(DataBuffer& a_Buffer) : m_Buffer(a_Buffer) {}
+
+	bool Deserialize(const PacketPtr& a_Packet) {
+		try {
+			Check(*a_Packet.get());
+		} catch (std::exception& e) {
+			utils::LOGE(utils::Format("[PacketSerializer::Deserializer] %s", e.what()));
+			return false;
+		}
+		return true;
+	}
+
+	PacketPtr& GetPacket() {
+		return m_Packet;
+	}
+
+	DeclareAllPacket()
+};
+
+
+
+
+
+DataBuffer Serialize(const Packet& a_Packet) {
+	DataBuffer buffer;
+
+	Serializer serializer(buffer);
+	serializer.Serialize(a_Packet);
+
+	return buffer;
+}
+
+std::unique_ptr<Packet> Deserialize(DataBuffer& a_Data) {
+	PacketID packetId;
+	a_Data >> packetId;
+
+	if (packetId >= static_cast<PacketID>(PacketType::PACKET_COUNT))
+		return nullptr;
+
+	PacketType packetType = PacketType(packetId);
+
+	// for double-dispatch
+	const PacketPtr& emptyPacket = PacketFactory::CreateReadOnlyPacket(packetType);
+
+	Deserializer deserializer(a_Data);
+
+	if (deserializer.Deserialize(emptyPacket)) {
+		PacketPtr packet = std::move(deserializer.GetPacket());
+		return packet;
+	}
+
+	return nullptr;
+}
+
+
+
+
+
+//---------------------------------------------
+// Packet serializer implementation
+//----------------------------------------------
+
+
+
+
+
+void Serializer::SerializePacketData(const pdata::PlayerLogin& a_Packet) {
+	m_Buffer << a_Packet.m_PlayerName;
+}
+
+void Deserializer::DeserializePacketData(pdata::PlayerLogin& a_Packet) {
+	m_Buffer >> a_Packet.m_PlayerName;
+}
+
+
+
+
+
+void Serializer::SerializePacketData(const pdata::LoggingSuccess& a_Packet) {
+	m_Buffer << a_Packet.m_PlayerId;
+}
+
+void Deserializer::DeserializePacketData(pdata::LoggingSuccess& a_Packet) {
+	m_Buffer >> a_Packet.m_PlayerId;
+}
+
+
+
+
+
+void Serializer::SerializePacketData(const pdata::PlayerJoin& a_Packet) {
+	m_Buffer << a_Packet.m_Player;
+}
+
+void Deserializer::DeserializePacketData(pdata::PlayerJoin& a_Packet) {
+	m_Buffer >> a_Packet.m_Player;
+}
+
+
+
+
+void Serializer::SerializePacketData(const pdata::PlayerLeave& a_Packet) {
+	m_Buffer << a_Packet.m_PlayerId;
+}
+
+void Deserializer::DeserializePacketData(pdata::PlayerLeave& a_Packet) {
+	m_Buffer >> a_Packet.m_PlayerId;
+}
+
+
+
+
+
+void Serializer::SerializePacketData(const pdata::KeepAlive& a_Packet) {
+	m_Buffer << a_Packet.m_KeepAliveId;
+}
+
+void Deserializer::DeserializePacketData(pdata::KeepAlive& a_Packet) {
+	m_Buffer >> a_Packet.m_KeepAliveId;
+}
+
+
+
+
+
+void Serializer::SerializePacketData(const pdata::Disconnect& a_Packet) {
+	m_Buffer << a_Packet.m_Reason;
+}
+
+void Deserializer::DeserializePacketData(pdata::Disconnect& a_Packet) {
+	m_Buffer >> a_Packet.m_Reason;
+}
+
+
+
+
+
+void Serializer::SerializePacketData(const pdata::ChatMessage& a_Packet) {
+	m_Buffer << a_Packet.m_Text;
+}
+
+void Deserializer::DeserializePacketData(pdata::ChatMessage& a_Packet) {
+	m_Buffer >> a_Packet.m_Text;
+}
+
+
+
+
+
+void Serializer::SerializePacketData(const pdata::LockSteps& a_Packet) {
+	m_Buffer << a_Packet.m_FirstFrameNumber;
+	for (int i = 0; i < LOCKSTEP_BUFFER_SIZE; i++) {
+		auto& lockStep = a_Packet.m_LockSteps[i];
+		m_Buffer << VarInt{lockStep.size()};
+
+		for (int j = 0; j < lockStep.size(); i++) {
+			auto command = lockStep[j];
+			m_Buffer << CommandSerializer::Serialize(*command);
+		}
+	}
+}
+
+void Deserializer::DeserializePacketData(pdata::LockSteps& a_Packet) {
+	m_Buffer >> a_Packet.m_FirstFrameNumber;
+	for (int i = 0; i < LOCKSTEP_BUFFER_SIZE; i++) {
+		VarInt lockStepSize;
+		m_Buffer >> lockStepSize;
+
+		for (std::size_t j = 0; j < lockStepSize.GetValue(); i++) {
+			auto command = CommandSerializer::Deserialize(m_Buffer);
+			if (command) {
+				a_Packet.m_LockSteps[i].push_back(command);
+			} else {
+				throw std::runtime_error("Failed to deserialise command");
+			}
+		}
+	}
+}
+
+
+
+
+
+void Serializer::SerializePacketData(const pdata::BeginGame& a_Packet) {
+	m_Buffer << a_Packet.m_Map << a_Packet.m_BlueTeam << a_Packet.m_RedTeam << a_Packet.m_Map;
+}
+
+void Deserializer::DeserializePacketData(pdata::BeginGame& a_Packet) {
+	m_Buffer >> a_Packet.m_Map >> a_Packet.m_BlueTeam >> a_Packet.m_RedTeam >> a_Packet.m_Map;
+}
+
+
+
+
+}  // namespace PacketSerializer
+}  // namespace protocol
+}  // namespace sp

src/sp/protocol/packet/PacketVisitor.cpp

@@ -0,0 +1,11 @@
+#include <sp/protocol/packet/PacketVisitor.h>
+
+namespace sp {
+namespace protocol {
+
+void PacketVisitor::Check(const Packet& a_Packet) {
+	a_Packet.Accept(*this);
+}
+
+}  // namespace protocol
+}  // namespace sp

src/sp/protocol/packet/Packets.cpp

@@ -0,0 +1,23 @@
+#define SP_INSTANCIATE_PACKETS
+#include <sp/protocol/packet/Packets.h>
+
+#include <sp/protocol/packet/PacketVisitor.h>
+
+namespace sp {
+namespace protocol {
+
+template <PacketType PT, typename Data>
+packets::ConcretePacket<PT, Data>::ConcretePacket(const PacketDataType& a_Data) : m_Data(a_Data) {}
+
+template <PacketType PT, typename Data>
+void packets::ConcretePacket<PT, Data>::Accept(PacketVisitor& a_Visitor) const {
+	a_Visitor.Visit(*this);
+}
+
+#define DeclarePacket(PacketName, packetSendType, packetSenderType)                                                                   \
+	static_assert(static_cast<unsigned>(PacketSendType::packetSendType) && static_cast<unsigned>(PacketSenderType::packetSenderType));
+
+DeclareAllPacket()
+
+}  // namespace protocol
+}  // namespace sp

test/sp/protocol/command/CommandFactory_test.cpp

@@ -0,0 +1,17 @@
+// #include <sp/protocol/command/CommandFactory.h>
+
+// #include <sp/misc/Test.h>
+
+// static int Test() {
+// 	for (std::size_t i = 0; i < static_cast<int>(td::protocol::CommandType::COMMAND_COUNT); i++) {
+// 		td::protocol::CommandType commandType = sp::protocol::CommandType(i);
+
+// 		if (td::protocol::CommandFactory::CreateReadOnlyCommand(commandType)->GetType() != commandType)
+// 			return SP_TEST_FAILED;
+// 	}
+// 	return SP_TEST_SUCCESSFUL;
+// }
+
+// int main() {
+// 	return Test();
+// }

test/sp/protocol/command/CommandSerializer_test.cpp

@@ -0,0 +1,96 @@
+// #include <sp/protocol/command/CommandSerializer.h>
+
+// #include <sp/misc/Test.h>
+// #include <sp/protocol/command/CommandFactory.h>
+
+// namespace tp = sp::protocol;
+
+// class Comparator {
+//   public:
+// 	bool operator()(const tp::cdata::End& left, const tp::cdata::End& right) {
+// 		return true;
+// 	}
+// 	bool operator()(const tp::cdata::PlaceTower& left, const tp::cdata::PlaceTower& right) {
+// 		return left.m_Placer == right.m_Placer && left.m_Position.x == right.m_Position.x && left.m_Position.y == right.m_Position.y &&
+// 			   left.m_Type == right.m_Type;
+// 	}
+// 	bool operator()(const tp::cdata::PlayerJoin& left, const tp::cdata::PlayerJoin& right) {
+// 		return left.m_ID == right.m_ID && left.m_Name == right.m_Name;
+// 	}
+// 	bool operator()(const tp::cdata::SpawnTroop& left, const tp::cdata::SpawnTroop& right) {
+// 		return left.m_Level == right.m_Level && left.m_Position.x == right.m_Position.x && left.m_Position.y == right.m_Position.y &&
+// 			   left.m_Sender == right.m_Sender && left.m_Type == right.m_Type;
+// 	}
+// 	bool operator()(const tp::cdata::TeamChange& left, const tp::cdata::TeamChange& right) {
+// 		return left.m_NewTeam == right.m_NewTeam && left.m_Player == right.m_Player;
+// 	}
+// 	bool operator()(const tp::cdata::UpgradeTower& left, const tp::cdata::UpgradeTower& right) {
+// 		return left.m_Tower == right.m_Tower && left.m_Upgrade == right.m_Upgrade;
+// 	}
+// 	bool operator()(const tp::cdata::UseItem& left, const tp::cdata::UseItem& right) {
+// 		return left.m_Item == right.m_Item && left.m_Position.x == right.m_Position.x && left.m_Position.y == right.m_Position.y &&
+// 			   left.m_User == right.m_User;
+// 	}
+// };
+
+// template <typename Command_T, typename Command_Data_T = typename Command_T::CommandDataType>
+// static int TestCommand(const Command_T& command) {
+
+// 	td::DataBuffer buffer = tp::CommandSerializer::Serialize(command);
+
+// 	auto abstractCommand = tp::CommandSerializer::Deserialize(buffer);
+
+// 	td_test_assert(abstractCommand);
+
+// 	Command_T* command2 = dynamic_cast<Command_T*>(abstractCommand.get());
+
+// 	td_test_assert(command2);
+// 	td_test_assert(command.GetType() == command2->GetType());
+
+// 	return Comparator{}(command.m_Data, command2->m_Data);
+// }
+
+// #define DeclareCommand(Command, ...) sp_test_assert(TestCommand<tp::commands::Command>({}));
+
+// static int TestAllCommands() {
+// 	td_test_assert(TestCommand<tp::commands::End>({}));
+// 	td_test_assert(TestCommand<tp::commands::PlaceTower>({tp::cdata::PlaceTower{
+// 		td::TowerType::Necromancer,
+// 		8,
+// 		td::TowerCoords{-50, 69},
+// 	}}));
+// 	td_test_assert(TestCommand<tp::commands::PlayerJoin>({tp::cdata::PlayerJoin{
+// 		4,
+// 		"Persson",
+// 	}}));
+// 	td_test_assert(TestCommand<tp::commands::SpawnTroop>({tp::cdata::SpawnTroop{
+// 		td::EntityType::Blaze,
+// 		4,
+// 		td::EntityCoords{td::FpFloat{54}, sp::FpFloat{58}},
+// 		2,
+// 	}}));
+// 	td_test_assert(TestCommand<tp::commands::TeamChange>({tp::cdata::TeamChange{
+// 		7,
+// 		td::Team::Red,
+// 	}}));
+// 	td_test_assert(TestCommand<tp::commands::UpgradeTower>({tp::cdata::UpgradeTower{
+// 		69,
+// 		3,
+// 	}}));
+// 	td_test_assert(TestCommand<tp::commands::UseItem>({tp::cdata::UseItem{
+// 		td::ShopItem::Freeze,
+// 		5,
+// 		td::EntityCoords{td::FpFloat{24}, sp::FpFloat{-69}},
+// 	}}));
+
+// 	DeclareAllCommand()
+
+// 	return SP_TEST_SUCCESSFUL;
+// }
+
+// int main() {
+// 	return TestAllCommands();
+// }
+int main() {
+	return 0;
+}

test/sp/protocol/packet/PacketFactory_test.cpp

@@ -0,0 +1,17 @@
+// #include <sp/protocol/packet/PacketFactory.h>
+
+// #include <sp/misc/Test.h>
+
+// static int Test() {
+// 	for (std::size_t i = 0; i < static_cast<int>(td::protocol::PacketType::PACKET_COUNT); i++) {
+// 		td::protocol::PacketType packetType = sp::protocol::PacketType(i);
+
+// 		if (td::protocol::PacketFactory::CreateReadOnlyPacket(packetType)->GetType() != packetType)
+// 			return SP_TEST_FAILED;
+// 	}
+// 	return SP_TEST_SUCCESSFUL;
+// }
+
+// int main() {
+// 	return Test();
+// }

test/sp/protocol/packet/PacketSerializer_test.cpp

@@ -0,0 +1,36 @@
+// #include <sp/protocol/packet/PacketSerializer.h>
+
+// #include <sp/misc/Test.h>
+// #include <sp/protocol/packet/PacketFactory.h>
+
+// namespace tp = sp::protocol;
+
+// template <typename Packet_T, typename Packet_Data_T = typename Packet_T::PacketDataType>
+// static int TestPacket() {
+// 	Packet_T packet;
+
+// 	td::DataBuffer buffer = tp::PacketSerializer::Serialize(packet);
+
+// 	auto abstractPacket = tp::PacketSerializer::Deserialize(buffer);
+
+// 	td_test_assert(abstractPacket);
+
+// 	Packet_T* packet2 = dynamic_cast<Packet_T*>(abstractPacket.get());
+
+// 	td_test_assert(packet2);
+// 	td_test_assert(packet.GetType() == packet2->GetType());
+
+// 	return std::memcmp(&packet.m_Data, &packet2->m_Data, sizeof(Packet_Data_T));
+// }
+
+// #define DeclarePacket(Packet, ...) TestPacket<tp::packets::Packet>();
+
+// static int TestAllPackets() {
+// 	DeclareAllPacket()
+
+// 	return TD_TEST_SUCCESSFUL;
+// }
+
+// int main() {
+// 	return TestAllPackets();
+// }

xmake.lua

@@ -0,0 +1,97 @@
+add_rules("mode.debug", "mode.release")
+
+set_languages("c++17")
+
+add_requires("enet6")
+
+target("SimpleProtocolLib")
+    add_includedirs("include", {public = true})
+    set_kind("static")
+    add_files("src/**.cpp")
+    add_packages("enet6", {public = true})
+
+
+
+-- Tests
+for _, file in ipairs(os.files("test/**.cpp")) do
+    local name = path.basename(file)
+    target(name)
+        set_kind("binary")
+
+        add_files(file)
+
+        set_default(false)
+
+        add_deps("SimpleProtocolLib")
+
+        add_tests("compile_and_run")
+end
+--
+-- If you want to known more usage about xmake, please see https://xmake.io
+--
+-- ## FAQ
+--
+-- You can enter the project directory firstly before building project.
+--
+--   $ cd projectdir
+--
+-- 1. How to build project?
+--
+--   $ xmake
+--
+-- 2. How to configure project?
+--
+--   $ xmake f -p [macosx|linux|iphoneos ..] -a [x86_64|i386|arm64 ..] -m [debug|release]
+--
+-- 3. Where is the build output directory?
+--
+--   The default output directory is `./build` and you can configure the output directory.
+--
+--   $ xmake f -o outputdir
+--   $ xmake
+--
+-- 4. How to run and debug target after building project?
+--
+--   $ xmake run [targetname]
+--   $ xmake run -d [targetname]
+--
+-- 5. How to install target to the system directory or other output directory?
+--
+--   $ xmake install
+--   $ xmake install -o installdir
+--
+-- 6. Add some frequently-used compilation flags in xmake.lua
+--
+-- @code
+--    -- add debug and release modes
+--    add_rules("mode.debug", "mode.release")
+--
+--    -- add macro definition
+--    add_defines("NDEBUG", "_GNU_SOURCE=1")
+--
+--    -- set warning all as error
+--    set_warnings("all", "error")
+--
+--    -- set language: c99, c++11
+--    set_languages("c99", "c++11")
+--
+--    -- set optimization: none, faster, fastest, smallest
+--    set_optimize("fastest")
+--
+--    -- add include search directories
+--    add_includedirs("/usr/include", "/usr/local/include")
+--
+--    -- add link libraries and search directories
+--    add_links("tbox")
+--    add_linkdirs("/usr/local/lib", "/usr/lib")
+--
+--    -- add system link libraries
+--    add_syslinks("z", "pthread")
+--
+--    -- add compilation and link flags
+--    add_cxflags("-stdnolib", "-fno-strict-aliasing")
+--    add_ldflags("-L/usr/local/lib", "-lpthread", {force = true})
+--
+-- @endcode
+--
+