il2cpp function&type and hook manager

lib/src/HookManager.h

@@ -0,0 +1,66 @@
+#pragma once
+
+#include "pch.h"
+
+#define CALL_ORIGIN(function, ...) \
+	HookManager::call(function, __func__, __VA_ARGS__)
+
+class HookManager {
+public:
+	template <typename Fn>
+	static void install(Fn func, Fn handler) {
+		enable(func, handler);
+		holderMap[reinterpret_cast<void*>(handler)] = reinterpret_cast<void*>(func);
+	}
+
+	template <typename Fn>
+	[[nodiscard]] static Fn getOrigin(Fn handler, const char* callerName = nullptr) noexcept {
+		if (holderMap.count(reinterpret_cast<void*>(handler)) == 0) {
+			printf("Origin not found for handler: %s. Maybe racing bug.", callerName == nullptr ? "<Unknown>" : callerName);
+			return nullptr;
+		}
+		return reinterpret_cast<Fn>(holderMap[reinterpret_cast<void*>(handler)]);
+	}
+
+	template <typename Fn>
+	[[nodiscard]] static void detach(Fn handler) noexcept {
+		disable(handler);
+		holderMap.erase(reinterpret_cast<void*>(handler));
+	}
+
+	template <typename RType, typename... Params>
+	[[nodiscard]] static RType call(RType(*handler)(Params...), const char* callerName = nullptr, Params... params) {
+		auto origin = getOrigin(handler, callerName);
+		if (origin != nullptr)
+			return origin(params...);
+
+		return RType();
+	}
+
+	static void detachAll() noexcept {
+		for (const auto &[key, value] : holderMap) {
+			disable(key);
+		}
+		holderMap.clear();
+	}
+
+private:
+	inline static std::map<void*, void*> holderMap{};
+
+	template <typename Fn>
+	static void disable(Fn handler) {
+		Fn origin = getOrigin(handler);
+		DetourTransactionBegin();
+		DetourUpdateThread(GetCurrentThread());
+		DetourDetach(&(PVOID&)origin, handler);
+		DetourTransactionCommit();
+	}
+
+	template <typename Fn>
+	static void enable(Fn& func, Fn handler) {
+		DetourTransactionBegin();
+		DetourUpdateThread(GetCurrentThread());
+		DetourAttach(&(PVOID&)func, handler);
+		DetourTransactionCommit();
+	}
+};