GameUI.h

#pragma once

#include <system_error>
#include <Windows.h>

namespace GameUI {
	typedef int(__thiscall *noarg_meth_t)(void*);
	typedef int(__thiscall *onearg_meth_t)(void*, void*);

	class TaskBar
	{
	private:
		HMODULE handle;
		void** inst_var;
		//
		onearg_meth_t runcmd_meth;
		noarg_meth_t open_options_dialog;
		noarg_meth_t open_create_multiplayer_game_dialog;
		noarg_meth_t open_load_demo_dialog;
		noarg_meth_t open_save_game_dialog;
		noarg_meth_t open_load_game_dialog;
		noarg_meth_t open_new_game_dialog;
		noarg_meth_t open_player_list_dialog;
		noarg_meth_t open_change_game_dialog;
		noarg_meth_t quit;


	public:
		TaskBar(uintptr_t inst_var_addr)
		{
			handle = GetModuleHandle("GameUI.dll");

			if (!handle) {
				throw std::runtime_error("GameUI module was not loaded");
			}
			//
			uintptr_t image_base = (uintptr_t)handle;
			inst_var = (void**)(image_base + inst_var_addr);
			//

#define METH(a, t) (t) (image_base + a)
#define METH_NONE(a) METH(a, noarg_meth_t)
#define METH_ONE(a) METH(a, onearg_meth_t)

			runcmd_meth = METH_ONE(0x2D1E0);
			open_options_dialog = METH_NONE(0x2DB40);
			open_create_multiplayer_game_dialog = METH_NONE(0x2DC10);
			open_load_demo_dialog = METH_NONE(0x2DBB0);
			open_save_game_dialog = METH_NONE(0x2DAE0);
			open_load_game_dialog = METH_NONE(0x2DA80);
			open_new_game_dialog = METH_NONE(0x2DA20);
			open_player_list_dialog = METH_NONE(0x2E0C0);
			open_change_game_dialog = METH_NONE(0x2E060);
			quit = METH_NONE(0x2D950);

#undef METH
#undef METH_NONE
#undef METH_ONE
		}

		~TaskBar()
		{
		}

#define METH_NONE_CALL(m) m(*inst_var)

		int RunCmd(char *cmd)
		{
			return runcmd_meth(*inst_var, cmd);
		}

		int OpenOptionsDialog()
		{
			return METH_NONE_CALL(open_options_dialog);
		}

		int OpenCreateMultiplayerGameDialog()
		{
			return METH_NONE_CALL(open_create_multiplayer_game_dialog);
		}

		int OpenLoadDemoDialog()
		{
			return METH_NONE_CALL(open_load_demo_dialog);
		}

		int OpenSaveGameDialog()
		{
			return METH_NONE_CALL(open_save_game_dialog);
		}

		int OpenLoadGameDialog()
		{
			return METH_NONE_CALL(open_load_game_dialog);
		}

		int OpenNewGameDialog()
		{
			return METH_NONE_CALL(open_new_game_dialog);
		}

		int OpenPlayerListDialog()
		{
			return METH_NONE_CALL(open_player_list_dialog);
		}

		int OpenChangeGameDialog()
		{
			return METH_NONE_CALL(open_change_game_dialog);
		}

		int Quit()
		{
			return METH_NONE_CALL(quit);
		}

#undef METH_NONE_CALL
	};

}