Prepare scripting environment

src/game/game.cpp

@@ -13,13 +13,61 @@ namespace game
 
 		MSG_ReadData_t MSG_ReadData;
 
+		RemoveRefToValue_t RemoveRefToValue;
+
 		Sys_ShowConsole_t Sys_ShowConsole;
 
+		VM_Notify_t VM_Notify;
+
 		int* cmd_args;
 		int* cmd_argc;
 		const char*** cmd_argv;
-	}
 
+		short* scrVarGlob;
+		char** scrMemTreePub;
+
+		void AddRefToValue(VariableValue* value)
+		{
+			if (value->type == SCRIPT_OBJECT)
+			{
+				++scrVarGlob[4 * value->u.entityId];
+			}
+			else if (value->type == SCRIPT_STRING)
+			{
+				static const auto size = is_sp() ? 16 : 12;
+				const auto ref_count = reinterpret_cast<unsigned volatile *>(*scrMemTreePub + size * value
+				                                                                                     ->u.stringValue);
+				InterlockedIncrement(ref_count);
+			}
+			else if (value->type == SCRIPT_VECTOR)
+			{
+				if (!*PBYTE(value->u.vectorValue - 1))
+				{
+					++*PWORD(value->u.vectorValue - 4);
+				}
+			}
+		}
+
+		scr_entref_t Scr_GetEntityIdRef(const unsigned int id)
+		{
+			static auto class_array = reinterpret_cast<DWORD*>(SELECT_VALUE(0x19AFC84, 0x1E72184, 0x1D3C804));
+			static auto ent_array = reinterpret_cast<WORD*>(SELECT_VALUE(0x19AFC82, 0x1E72182, 0x1D3C802));
+
+			scr_entref_t result{};
+			result.raw.classnum = static_cast<unsigned short>(class_array[2 * id]) >> 8;
+			result.raw.entnum = ent_array[4 * id];
+
+			return result;
+		}
+
+		const char* SL_ConvertToString(unsigned int stringValue)
+		{
+			if (!stringValue) return nullptr;
+
+			static const auto size = is_sp() ? 16 : 12;
+			return *scrMemTreePub + size * stringValue + 4;
+		}
+	}
 
 	launcher::mode mode = launcher::mode::none;
 
@@ -50,10 +98,17 @@ namespace game
 
 		native::MSG_ReadData = native::MSG_ReadData_t(SELECT_VALUE(0, 0x5592A0, 0));
 
+		native::RemoveRefToValue = native::RemoveRefToValue_t(SELECT_VALUE(0x477EA0, 0x565730, 0x4E8A40));
+
 		native::Sys_ShowConsole = native::Sys_ShowConsole_t(SELECT_VALUE(0x470AF0, 0x5CF590, 0));
 
+		native::VM_Notify = native::VM_Notify_t(SELECT_VALUE(0x610200, 0x569720, 0x4EF450));
+
 		native::cmd_args = reinterpret_cast<int*>(SELECT_VALUE(0x1750750, 0x1C978D0, 0x1B455F8));
 		native::cmd_argc = reinterpret_cast<int*>(SELECT_VALUE(0x1750794, 0x1C97914, 0x1B4563C));
 		native::cmd_argv = reinterpret_cast<const char***>(SELECT_VALUE(0x17507B4, 0x1C97934, 0x1B4565C));
+
+		native::scrVarGlob = reinterpret_cast<short*>(SELECT_VALUE(0x19AFC80, 0x1E72180, 0x1D3C800));
+		native::scrMemTreePub = reinterpret_cast<char**>(SELECT_VALUE(0x196FB00, 0x1E32000, 0x1C152A4));
 	}
 }

src/game/game.hpp

@@ -18,15 +18,30 @@ namespace game
 		typedef void (*DB_LoadXAssets_t)(XZoneInfo* zoneInfo, unsigned int zoneCount, int sync);
 		extern DB_LoadXAssets_t DB_LoadXAssets;
 
-		typedef void(*MSG_ReadData_t)(msg_t *msg, void *data, int len);
+		typedef void (*MSG_ReadData_t)(msg_t* msg, void* data, int len);
 		extern MSG_ReadData_t MSG_ReadData;
 
+		typedef void (*RemoveRefToValue_t)(scriptType_e type, VariableUnion u);
+		extern RemoveRefToValue_t RemoveRefToValue;
+
 		typedef void (*Sys_ShowConsole_t)();
 		extern Sys_ShowConsole_t Sys_ShowConsole;
 
+		typedef void (*VM_Notify_t)(unsigned int notifyListOwnerId, unsigned int stringValue, VariableValue* top);
+		extern VM_Notify_t VM_Notify;
+
 		extern int* cmd_args;
 		extern int* cmd_argc;
 		extern const char*** cmd_argv;
+
+		extern short* scrVarGlob;
+		extern char** scrMemTreePub;
+
+		void AddRefToValue(VariableValue* value);
+
+		scr_entref_t Scr_GetEntityIdRef(unsigned int id);
+
+		const char* SL_ConvertToString(unsigned int stringValue);
 	}
 
 	bool is_mp();

src/game/structs.hpp

@@ -399,5 +399,56 @@ namespace game
 			int allocFlags;
 			int freeFlags;
 		};
+
+		struct scr_entref_raw
+		{
+			unsigned __int16 entnum;
+			unsigned __int16 classnum;
+		};
+
+		union scr_entref_t
+		{
+			unsigned int val;
+			scr_entref_raw raw;
+		};
+
+		enum scriptType_e
+		{
+			SCRIPT_NONE = 0,
+			SCRIPT_OBJECT = 1,
+			SCRIPT_STRING = 2,
+			SCRIPT_VECTOR = 4,
+			SCRIPT_FLOAT = 5,
+			SCRIPT_INTEGER = 6,
+			SCRIPT_END = 8, // Custom
+		};
+
+		struct VariableStackBuffer
+		{
+			const char* pos;
+			unsigned __int16 size;
+			unsigned __int16 bufLen;
+			unsigned __int16 localId;
+			char time;
+			char buf[1];
+		};
+
+		union VariableUnion
+		{
+			int intValue;
+			float floatValue;
+			unsigned int stringValue;
+			const float* vectorValue;
+			const char* codePosValue;
+			unsigned int pointerValue;
+			VariableStackBuffer* stackValue;
+			unsigned int entityId;
+		};
+
+		struct VariableValue
+		{
+			VariableUnion u;
+			scriptType_e type;
+		};
 	}
 }

src/module/notification.cpp

@@ -0,0 +1,37 @@
+#include <std_include.hpp>
+#include "loader/module_loader.hpp"
+#include "notification.hpp"
+#include "utils/hook.hpp"
+
+void notification::post_load()
+{
+	utils::hook(SELECT_VALUE(0x6109F3, 0x56B637, 0x4EDFF7), vm_notify_stub, HOOK_CALL).install()->quick();
+	utils::hook(SELECT_VALUE(0x6128BE, 0x56D541, 0x4EFAF9), vm_notify_stub, HOOK_CALL).install()->quick();
+
+	if (game::is_sp())
+	{
+		utils::hook(0x610970, vm_notify_stub, HOOK_JUMP).install()->quick();
+	}
+}
+
+void notification::vm_notify_stub(const unsigned int notify_id, const unsigned short type,
+                                  game::native::VariableValue* stack)
+{
+	event e;
+	e.name = game::native::SL_ConvertToString(type);
+	e.entity = game::native::Scr_GetEntityIdRef(notify_id);
+
+	for (auto value = stack; value->type != game::native::SCRIPT_END; --value)
+	{
+		e.arguments.emplace_back(*value);
+	}
+
+	if(!e.arguments.empty())
+	{
+		printf("");
+	}
+
+	game::native::VM_Notify(notify_id, type, stack);
+}
+
+REGISTER_MODULE(notification)

src/module/notification.hpp

@@ -0,0 +1,20 @@
+#pragma once
+#include "loader/module_loader.hpp"
+#include "scripting.hpp"
+
+class notification final : public module
+{
+public:
+	class event final
+	{
+	public:
+		std::string name;
+		game::native::scr_entref_t entity;
+		std::vector<scripting::variable> arguments;
+	};
+
+	void post_load() override;
+
+private:
+	static void vm_notify_stub(unsigned int notify_id, unsigned short type, game::native::VariableValue* stack);
+};

src/module/scripting.cpp

@@ -1,26 +1,101 @@
 #include <std_include.hpp>
-#include "loader/module_loader.hpp"
-#include "game/game.hpp"
+#include "scripting.hpp"
 
-class scripting final : public module
+utils::hook scripting::start_hook_;
+utils::hook scripting::stop_hook_;
+
+std::mutex scripting::mutex_;
+std::vector<std::function<void()>> scripting::start_callbacks_;
+std::vector<std::function<void()>> scripting::stop_callbacks_;
+
+scripting::variable::variable(game::native::VariableValue value) : value_(value)
 {
-public:
-	void post_load() override
+	game::native::AddRefToValue(&value);
+}
+
+scripting::variable::~variable()
+{
+	game::native::RemoveRefToValue(this->value_.type, this->value_.u);
+}
+
+scripting::variable::operator game::native::VariableValue() const
+{
+	return this->value_;
+}
+
+void scripting::post_load()
+{
+	start_hook_.initialize(SELECT_VALUE(0x50C575, 0x50D4F2, 0x48A026), []()
 	{
-		this->chai_.add(chaiscript::fun(&function), "function");
-
-		double d = this->chai_.eval<double>("function(3, 4.75);");
-		printf("Result: %f", d);
+		start_execution();
+		static_cast<void(*)()>(start_hook_.get_original())();
+	}, HOOK_CALL)->install()->quick();
+
+	stop_hook_.initialize(SELECT_VALUE(0x528B04, 0x569E46, 0x4F03FA), []()
+	{
+		stop_execution();
+		static_cast<void(*)()>(stop_hook_.get_original())();
+	}, HOOK_CALL)->install()->quick();
+
+	on_start([this]()
+	{
+		this->chai_ = std::make_unique<chaiscript::ChaiScript>();
+	});
+
+	on_stop([this]()
+	{
+		this->chai_ = {};
+	});
+}
+
+void scripting::pre_destroy()
+{
+	this->chai_ = {};
+	start_callbacks_.clear();
+	stop_callbacks_.clear();
+}
+
+void scripting::on_start(const std::function<void()>& callback)
+{
+	std::lock_guard _(mutex_);
+	start_callbacks_.push_back(callback);
+}
+
+void scripting::on_stop(const std::function<void()>& callback)
+{
+	std::lock_guard _(mutex_);
+	stop_callbacks_.push_back(callback);
+}
+
+void scripting::start_execution()
+{
+	std::vector<std::function<void()>> copy;
+
+	{
+		std::lock_guard _(mutex_);
+		copy = start_callbacks_;
 	}
 
-private:
-	chaiscript::ChaiScript chai_;
+	for (const auto& callback : copy)
+	{
+		callback();
+	}
+}
 
-	static double function(int i, double j)
-	{
-		return i * j;
-	}
+void scripting::stop_execution()
+{
+	std::vector<std::function<void()>> copy;
+
+	{
+		std::lock_guard _(mutex_);
+		copy = stop_callbacks_;
+	}
+
+	for (const auto& callback : copy)
+	{
+		callback();
+	}
+}
 
-};
 
 REGISTER_MODULE(scripting)

src/module/scripting.hpp

@@ -0,0 +1,39 @@
+#pragma once
+#include "loader/module_loader.hpp"
+#include "game/game.hpp"
+#include "utils/hook.hpp"
+
+class scripting final : public module
+{
+public:
+	class variable final
+	{
+	public:
+		variable(game::native::VariableValue value);
+		~variable();
+
+		operator game::native::VariableValue() const;
+
+	private:
+		game::native::VariableValue value_;
+	};
+
+	void post_load() override;
+	void pre_destroy() override;
+
+	static void on_start(const std::function<void()>& callback);
+	static void on_stop(const std::function<void()>& callback);
+
+private:
+	std::unique_ptr<chaiscript::ChaiScript> chai_;
+
+	static utils::hook start_hook_;
+	static utils::hook stop_hook_;
+
+	static std::mutex mutex_;
+	static std::vector<std::function<void()>> start_callbacks_;
+	static std::vector<std::function<void()>> stop_callbacks_;
+
+	static void start_execution();
+	static void stop_execution();
+};

src/utils/hook.cpp

@@ -156,6 +156,11 @@ namespace utils
 		return this->place_;
 	}
 
+	void* hook::get_original() const
+	{
+		return this->original_;
+	}
+
 	void hook::nop(void* place, const size_t length)
 	{
 		DWORD old_protect;

src/utils/hook.hpp

@@ -80,6 +80,7 @@ namespace utils
 		hook* uninstall(bool unprotect = true);
 
 		void* get_address() const;
+		void* get_original() const;
 		void quick();
 
 		static bool iat(nt::module module, const std::string& target_module, const std::string& process, void* stub);