Use t6-gsc-utils as a base.

src/game/game.hpp

@@ -0,0 +1,66 @@
+#pragma once
+
+#include "structs.hpp"
+
+#define SELECT(mp, sp) (game::environment::t4mp() ? mp : sp)
+
+namespace game
+{
+	enum gamemode
+	{
+		multiplayer,
+		singleplayer,
+		none
+	};
+
+	extern gamemode current;
+
+	namespace environment
+	{
+		bool t4mp();
+		bool t4sp();
+	}
+
+	template <typename T>
+	class symbol
+	{
+	public:
+		symbol(const size_t t4mp, const size_t t4sp)
+			: t4mp_(reinterpret_cast<T*>(t4mp))
+			, t4sp_(reinterpret_cast<T*>(t4sp))
+		{
+		}
+
+		T* get() const
+		{
+			if (environment::t4mp())
+			{
+				return t4mp_;
+			}
+
+			return t4sp_;
+		}
+
+		void set(const size_t ptr)
+		{
+			this->t4mp_ = reinterpret_cast<T*>(ptr);
+			this->t4sp_ = reinterpret_cast<T*>(ptr);
+		}
+
+		operator T* () const
+		{
+			return this->get();
+		}
+
+		T* operator->() const
+		{
+			return this->get();
+		}
+
+	private:
+		T* t4mp_;
+		T* t4sp_;
+	};
+}
+
+#include "symbols.hpp"