iw5-mod/src/game/game.cpp

#include <std_include.hpp>
#include "game.hpp"

namespace game
{
	namespace native
	{
		Cmd_AddCommand_t Cmd_AddCommand;

		Cmd_RemoveCommand_t Cmd_RemoveCommand;

		Com_Error_t Com_Error;

		DB_LoadXAssets_t DB_LoadXAssets;

		Dvar_RegisterBool_t Dvar_RegisterBool;

		Dvar_RegisterFloat_t Dvar_RegisterFloat;

		Dvar_SetIntByName_t Dvar_SetIntByName;

		Dvar_SetFromStringByName_t Dvar_SetFromStringByName;

		G_RunFrame_t G_RunFrame;

		MSG_ReadData_t MSG_ReadData;

		MT_AllocIndex_t MT_AllocIndex;

		RemoveRefToValue_t RemoveRefToValue;

		SL_GetStringOfSize_t SL_GetStringOfSize;

		Scr_AddEntityNum_t Scr_AddEntityNum;

		Scr_Notify_t Scr_Notify;

		Sys_ShowConsole_t Sys_ShowConsole;

		VM_Notify_t VM_Notify;

		BG_NetDataChecksum_t BG_NetDataChecksum;

		LiveStorage_GetPersistentDataDefVersion_t LiveStorage_GetPersistentDataDefVersion;

		LiveStorage_GetPersistentDataDefFormatChecksum_t LiveStorage_GetPersistentDataDefFormatChecksum;

		SV_DirectConnect_t SV_DirectConnect;

		SV_ClientEnterWorld_t SV_ClientEnterWorld;

		SV_Cmd_TokenizeString_t SV_Cmd_TokenizeString;

		SV_Cmd_EndTokenizedString_t SV_Cmd_EndTokenizedString;

		SV_GameSendServerCommand_t SV_GameSendServerCommand;

		SV_SendServerCommand_t SV_SendServerCommand;

		XUIDToString_t XUIDToString;

		SEH_LocalizeTextMessage_t SEH_LocalizeTextMessage;

		PM_WeaponUseAmmo_t PM_WeaponUseAmmo;

		CM_TransformedCapsuleTrace_t CM_TransformedCapsuleTrace;

		Weapon_RocketLauncher_Fire_t Weapon_RocketLauncher_Fire;

		PM_playerTrace_t PM_playerTrace;

		PM_trace_t PM_trace;

		Cmd_ExecuteSingleCommand_t Cmd_ExecuteSingleCommand;

		Com_Quit_f_t Com_Quit_f;

		decltype(longjmp)* _longjmp;

		CmdArgs* sv_cmd_args;
		CmdArgs* cmd_args;

		short* scrVarGlob;
		char** scrMemTreePub;
		char* scrMemTreeGlob;

		scrVmPub_t* scr_VmPub;

		scr_call_t* scr_instanceFunctions;
		scr_call_t* scr_globalFunctions;

		unsigned int* levelEntityId;

		int* g_script_error_level;
		jmp_buf* g_script_error;

		scr_classStruct_t* g_classMap;

		int* svs_clientCount;

		gentity_s* g_entities;

		namespace mp
		{
			client_t* svs_clients;
		}

		namespace dedi
		{
			client_t* svs_clients;
		}

		namespace sp
		{
			sp::gentity_s* g_entities;
		}

		void AddRefToValue(VariableValue* value)
		{
			if (value->type == SCRIPT_OBJECT)
			{
				++scrVarGlob[4 * value->u.entityId];
			}
			else if ((value->type & ~1) == 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);
				}
			}
		}

		__declspec(naked) unsigned int conbuf_append_text_dedicated(const char* message)
		{
			static DWORD func = 0x53C790;

			__asm
			{
				mov ecx, message
				call func
				retn
			}
		}

		void Conbuf_AppendText(const char* message)
		{
			if (is_dedi())
			{
				conbuf_append_text_dedicated(message);
			}
			else
			{
				reinterpret_cast<void(*)(const char*)>(SELECT_VALUE(0x4C84E0, 0x5CF610, 0))(message);
			}
		}

		__declspec(naked) unsigned int find_variable_dedicated(unsigned int parentId, unsigned int name)
		{
			static DWORD func = 0x4E7ED0;

			__asm
			{
				mov eax, name
				mov ecx, parentId
				call func
				retn
			}
		}

		unsigned int FindVariable(const unsigned int parentId, const unsigned int name)
		{
			if (is_dedi())
			{
				return find_variable_dedicated(parentId, name);
			}
			else
			{
				return reinterpret_cast<unsigned int(*)(unsigned int, unsigned int)> //
					(SELECT_VALUE(0x4C4E70, 0x5651F0, 0x0))(parentId, name);
			}
		}

		__declspec(naked) VariableValue get_entity_field_value_dedicated(unsigned int classnum, int entnum, int _offset)
		{
			static DWORD func = 0x4F1400;

			__asm
			{
				push _offset
				push entnum
				mov ecx, classnum
				call func
				add esp, 8h
				retn
			}
		}

		VariableValue GetEntityFieldValue(const unsigned int classnum, const int entnum, const int offset)
		{
			if (is_dedi())
			{
				return get_entity_field_value_dedicated(classnum, entnum, offset);
			}
			else
			{
				return reinterpret_cast<VariableValue(*)(unsigned int, int, int)> //
					(SELECT_VALUE(0x530E30, 0x56AF20, 0x0))(classnum, entnum, offset);
			}
		}

		void* MT_Alloc(const int numBytes, const int type)
		{
			return scrMemTreeGlob + 12 * size_t(MT_AllocIndex(numBytes, type));
		}

		__declspec(naked) dvar_t* dvar_find_malleable_var(const char* dvarName)
		{
			static DWORD func = 0x531320;

			__asm
			{
				mov edi, dvarName
				call func
				retn
			}
		}

		dvar_t* Dvar_FindVar(const char* dvarName)
		{
			if (is_dedi())
			{
				return dvar_find_malleable_var(dvarName);
			}
			else
			{
				return reinterpret_cast<dvar_t*(*)(const char*)>
					(SELECT_VALUE(0x539550, 0x5BDCC0, 0x0))(dvarName);
			}
		}

		const float* Scr_AllocVector(const float* v)
		{
			const auto mem = static_cast<DWORD*>(MT_Alloc(16, 2));
			*mem = 0;

			const auto array = reinterpret_cast<float*>(mem + 1);
			array[0] = v[0];
			array[1] = v[1];
			array[2] = v[2];

			return array;
		}

		void Scr_ClearOutParams()
		{
			const auto num_params = scr_VmPub->outparamcount;
			for (unsigned int i = num_params; i > 0; --i)
			{
				const auto value = scr_VmPub->top[i - 1];
				RemoveRefToValue(value.type, value.u);
			}

			scr_VmPub->top -= num_params;
		}

		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;
		}

		scr_call_t Scr_GetFunc(const unsigned int index)
		{
			if (index > 0x1C7)
			{
				return scr_instanceFunctions[index];
			}
			else
			{
				return scr_globalFunctions[index];
			}
		}

		__declspec(naked) void scr_notify_id_multiplayer(unsigned int id, unsigned int stringValue,
		                                                 unsigned int paramcount)
		{
			static DWORD func = 0x56B5E0;

			__asm
			{
				mov eax, paramcount
				push stringValue
				push id
				call func
				add esp, 8h
				retn
			}
		}

		__declspec(naked) void scr_notify_id_singleplayer(unsigned int id, unsigned int stringValue,
		                                                  unsigned int paramcount)
		{
			static DWORD func = 0x610980;

			__asm
			{
				mov eax, paramcount
				push stringValue
				push id
				call func
				add esp, 8h
				retn
			}
		}

		void Scr_NotifyId(unsigned int id, unsigned int stringValue, unsigned int paramcount)
		{
			if (is_mp())
			{
				return scr_notify_id_multiplayer(id, stringValue, paramcount);
			}
			else if (is_sp())
			{
				return scr_notify_id_singleplayer(id, stringValue, paramcount);
			}
			else
			{
				return reinterpret_cast<void(*)(unsigned int, unsigned int, unsigned int)>(0x4EFAA0)(
					id, stringValue, paramcount);
			}
		}

		__declspec(naked) int scr_set_object_field_dedicated(unsigned int classnum, int entnum, int _offset)
		{
			static DWORD func = 0x4B15C0;

			__asm
			{
				mov ecx, _offset
				mov eax, entnum
				push classnum
				call func
				add esp, 4h
				retn
			}
		}

		int Scr_SetObjectField(const unsigned int classnum, const int entnum, const int offset)
		{
			if (is_dedi())
			{
				return scr_set_object_field_dedicated(classnum, entnum, offset);
			}
			else
			{
				return reinterpret_cast<int(*)(unsigned int, int, int)> //
					(SELECT_VALUE(0x42CAD0, 0x52BCC0, 0x0))(classnum, entnum, offset);
			}
		}

		__declspec(naked) void scr_add_string_dedi(const char* value)
		{
			static DWORD func = 0x4F1010;

			__asm
			{
				mov edi, value
				call func
				retn
			}
		}

		void Scr_AddString(const char* value)
		{
			if (is_dedi())
			{
				scr_add_string_dedi(value);
			}
			else if (is_mp())
			{
				reinterpret_cast<void(*)(const char*)>
					(0x56AC00)(value);
			}
		}

		const char* SL_ConvertToString(const unsigned int stringValue)
		{
			if (!stringValue) return nullptr;

			static const auto size = is_sp() ? 16 : 12;
			return *scrMemTreePub + size * stringValue + 4;
		}

		unsigned int SL_GetString(const char* str, const unsigned int user)
		{
			return SL_GetStringOfSize(str, user, strlen(str) + 1, 7);
		}

		__declspec(naked) void sv_send_client_game_state_mp(mp::client_t* /*client*/)
		{
			static DWORD func = 0x570FC0;

			__asm
			{
				pushad

				mov esi, [esp + 0x20 + 0x4]
				call func

				popad
				retn
			}
		}

		void SV_SendClientGameState(mp::client_t* client)
		{
			if (is_mp())
			{
				sv_send_client_game_state_mp(client);
			}
		}

		int SV_IsTestClient(int clientNum)
		{
			assert(clientNum < *svs_clientCount);

			if (is_dedi())
			{
				return dedi::svs_clients[clientNum].bIsTestClient;
			}
			else if (is_mp())
			{
				return mp::svs_clients[clientNum].bIsTestClient;
			}

			return 0;
		}

		void SV_DropClient(mp::client_t* drop, const char* reason, bool tellThem)
		{
			if (is_mp())
			{
				reinterpret_cast<void(*)(mp::client_t*, const char*, bool)>
					(0x570980)(drop, reason, tellThem);
			}
		}

		void sv_drop_all_bots_mp()
		{
			for (auto i = 0; i < *svs_clientCount; i++)
			{
				if (mp::svs_clients[i].header.state != CS_FREE
					&& mp::svs_clients[i].header.netchan.remoteAddress.type == NA_BOT)
				{
					SV_DropClient(&mp::svs_clients[i], "EXE_TIMEDOUT", true);
				}
			}
		}

		void SV_DropAllBots()
		{
			if (is_mp())
			{
				sv_drop_all_bots_mp();
			}
		}

		__declspec(naked) void client_command_dedi(int clientNum)
		{
			static DWORD func = 0x47EA40;

			__asm
			{
				mov edi, clientNum
				call func
				retn
			}
		}

		void ClientCommand(int clientNum)
		{
			if (is_dedi())
			{
				client_command_dedi(clientNum);
			}
			else if (is_mp())
			{
				reinterpret_cast<void(*)(int)>(0x502CB0)(clientNum);
			}
		}

		int GetProtocolVersion()
		{
			return 0x507C;
		}

		void NetAdr_SetType(netadr_s* addr, netadrtype_t type)
		{
			addr->type = type;
		}

		__declspec(naked) void cbuf_add_text_dedi(LocalClientNum_t localClientNum, const char* text)
		{
			static DWORD func = 0x4CB5D0;

			__asm
			{
				mov eax, text
				push localClientNum
				call func
				add esp, 4h
				retn
			}
		}

		void Cbuf_AddText(LocalClientNum_t localClientNum, const char* text)
		{
			if (is_dedi())
			{
				cbuf_add_text_dedi(localClientNum, text);
			}
			else
			{
				reinterpret_cast<void(*)(LocalClientNum_t, const char*)>
					(SELECT_VALUE(0x457C90, 0x545680, 0x0))(localClientNum, text);
			}
		}

		__declspec(naked) void teleport_player_dedi(gentity_s* player, float* origin, float* angles)
		{
			static DWORD func = 0x48B840;

			__asm
			{
				mov eax, player
				mov ecx, origin
				push angles
				call func
				add esp, 4h
				retn
			}
		}

		void TeleportPlayer(gentity_s* player, float* origin, float* angles)
		{
			if (is_dedi())
			{
				teleport_player_dedi(player, origin, angles);
			}
			else if (is_mp())
			{
				reinterpret_cast<void(*)(gentity_s*, float*, float*)>
					(0x50D840)(player, origin, angles);
			}
		}

		// SP takes one extra argument, all possible values are undocumented
		void CG_GameMessage(LocalClientNum_t localClientNum, const char* msg, int flags)
		{
			if (is_mp())
			{
				reinterpret_cast<void(*)(LocalClientNum_t, const char*)>(0x456DC0)(localClientNum, msg);
			}
			else if (is_sp())
			{
				reinterpret_cast<void(*)(LocalClientNum_t, const char*, int)>(0x4228A0)(localClientNum, msg, flags);
			}
		}
	}

	launcher::mode mode = launcher::mode::none;

	launcher::mode get_mode()
	{
		if (mode == launcher::mode::none)
		{
			throw std::runtime_error("Launcher mode not valid. Something must be wrong.");
		}

		return mode;
	}

	bool is_mp()
	{
		return get_mode() == launcher::mode::multiplayer;
	}

	bool is_sp()
	{
		return get_mode() == launcher::mode::singleplayer;
	}

	bool is_dedi()
	{
		return get_mode() == launcher::mode::server;
	}

	void initialize(const launcher::mode _mode)
	{
		mode = _mode;

		native::Cmd_AddCommand = native::Cmd_AddCommand_t(SELECT_VALUE(0x558820, 0x545DF0, 0));

		native::Cmd_RemoveCommand = native::Cmd_RemoveCommand_t(SELECT_VALUE(0x443A30, 0x545E20, 0x4CC060));

		native::Com_Error = native::Com_Error_t(SELECT_VALUE(0x425540, 0x555450, 0x4D93F0));

		native::DB_LoadXAssets = native::DB_LoadXAssets_t(SELECT_VALUE(0x48A8E0, 0x4CD020, 0x44F770));

		native::Dvar_RegisterBool = native::Dvar_RegisterBool_t(SELECT_VALUE(0x4914D0, 0x5BE9F0, 0x0));

		native::Dvar_RegisterFloat = native::Dvar_RegisterFloat_t(SELECT_VALUE(0x4F9CC0, 0x5BEA80, 0x0));

		native::Dvar_SetIntByName = native::Dvar_SetIntByName_t(SELECT_VALUE(0x5396B0, 0x5BF560, 0x0));

		native::Dvar_SetFromStringByName = native::Dvar_SetFromStringByName_t(
			SELECT_VALUE(0x4DD090, 0x5BF740, 0x518DF0));

		native::G_RunFrame = native::G_RunFrame_t(SELECT_VALUE(0x52EAA0, 0x50CB70, 0x48AD60));

		native::MSG_ReadData = native::MSG_ReadData_t(SELECT_VALUE(0, 0x5592A0, 0));

		native::MT_AllocIndex = native::MT_AllocIndex_t(SELECT_VALUE(0x4B9610, 0x562080, 0x4E6C30));

		native::RemoveRefToValue = native::RemoveRefToValue_t(SELECT_VALUE(0x477EA0, 0x565730, 0x4E8A40));

		native::SL_GetStringOfSize = native::SL_GetStringOfSize_t(SELECT_VALUE(0x4E13F0, 0x564650, 0x4E7490));

		native::Scr_AddEntityNum = native::Scr_AddEntityNum_t(SELECT_VALUE(0x0, 0x56ABC0, 0x4EA2F0));

		native::Scr_Notify = native::Scr_Notify_t(SELECT_VALUE(0x4895B0, 0x52B190, 0x0));

		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::BG_NetDataChecksum = native::BG_NetDataChecksum_t(SELECT_VALUE(0x0, 0x41BB20, 0x0));

		native::LiveStorage_GetPersistentDataDefVersion = native::LiveStorage_GetPersistentDataDefVersion_t(
			SELECT_VALUE(0x0, 0x548D60, 0x4D0390));

		native::LiveStorage_GetPersistentDataDefFormatChecksum = native::LiveStorage_GetPersistentDataDefFormatChecksum_t(
			SELECT_VALUE(0x0, 0x548D80, 0x4D03D0));

		native::SV_DirectConnect = native::SV_DirectConnect_t(SELECT_VALUE(0x0, 0x572750, 0x4F74C0));

		native::SV_ClientEnterWorld = native::SV_ClientEnterWorld_t(SELECT_VALUE(0x0, 0x571100, 0x0));

		native::SV_Cmd_TokenizeString = native::SV_Cmd_TokenizeString_t(SELECT_VALUE(0x0, 0x545D40, 0x0));

		native::SV_Cmd_EndTokenizedString = native::SV_Cmd_EndTokenizedString_t(SELECT_VALUE(0x0, 0x545D70, 0x0));

		native::SV_GameSendServerCommand = native::SV_GameSendServerCommand_t(SELECT_VALUE(0x402130, 0x573220, 0x0));

		native::SV_SendServerCommand = native::SV_SendServerCommand_t(SELECT_VALUE(0x4F6990, 0x575DE0, 0x4FD5A0));

		native::XUIDToString = native::XUIDToString_t(SELECT_VALUE(0x4FAA30, 0x55CC20, 0x0));

		native::SEH_LocalizeTextMessage = native::SEH_LocalizeTextMessage_t(
			SELECT_VALUE(0x41EA20, 0x57E240, 0x0));

		native::PM_WeaponUseAmmo = native::PM_WeaponUseAmmo_t(SELECT_VALUE(0x463F80, 0x42E930, 0x0));

		native::CM_TransformedCapsuleTrace = native::CM_TransformedCapsuleTrace_t(
			SELECT_VALUE(0x4F9B80, 0x541340, 0x0));

		native::Weapon_RocketLauncher_Fire = native::Weapon_RocketLauncher_Fire_t(
			SELECT_VALUE(0x48C920, 0x5305D0, 0x0));

		native::PM_playerTrace = native::PM_playerTrace_t(SELECT_VALUE(0x4CE600, 0x421F00, 0x0));

		native::PM_trace = native::PM_trace_t(SELECT_VALUE(0x544BF0, 0x41CEB0, 0x0));

		native::Cmd_ExecuteSingleCommand = native::Cmd_ExecuteSingleCommand_t(
			SELECT_VALUE(0x4D6960, 0x5462B0, 0x4CC360));

		native::Com_Quit_f = native::Com_Quit_f_t(SELECT_VALUE(0x4F48B0, 0x5556B0, 0x4D95B0));

		native::_longjmp = reinterpret_cast<decltype(longjmp)*>(SELECT_VALUE(0x73AC20, 0x7363BC, 0x655558));

		native::sv_cmd_args = reinterpret_cast<native::CmdArgs*>(SELECT_VALUE(0x1757218, 0x1CAA998, 0x1B5E7D8));
		native::cmd_args = reinterpret_cast<native::CmdArgs*>(SELECT_VALUE(0x1750750, 0x1C978D0, 0x1B455F8));

		native::scrVarGlob = reinterpret_cast<short*>(SELECT_VALUE(0x19AFC80, 0x1E72180, 0x1D3C800));
		native::scrMemTreePub = reinterpret_cast<char**>(SELECT_VALUE(0x196FB00, 0x1E32000, 0x1C152A4));
		native::scrMemTreeGlob = reinterpret_cast<char*>(SELECT_VALUE(0x186DA00, 0x1D6FF00, 0x1C16600));

		native::scr_VmPub = reinterpret_cast<native::scrVmPub_t*>(SELECT_VALUE(0x1BF2580, 0x20B4A80, 0x1F5B080));

		native::scr_instanceFunctions = reinterpret_cast<native::scr_call_t*>(SELECT_VALUE(0x184CDB0, 0x1D4F258,
		                                                                                   0x1BF59C8));
		native::scr_globalFunctions = reinterpret_cast<native::scr_call_t*>(SELECT_VALUE(0x186C68C, 0x1D6EB34,
		                                                                                 0x1C152A4
		));

		native::g_script_error_level = reinterpret_cast<int*>(SELECT_VALUE(0x1BEFCFC, 0x20B21FC, 0x1F5B058));
		native::g_script_error = reinterpret_cast<jmp_buf*>(SELECT_VALUE(0x1BF1D18, 0x20B4218, 0x1F5A818));

		native::g_classMap = reinterpret_cast<native::scr_classStruct_t*>(SELECT_VALUE(0x92D140, 0x8B4300, 0x7C0408));

		native::svs_clientCount = reinterpret_cast<int*>(SELECT_VALUE(0x0, 0x4B5CF8C, 0x4A12E8C));

		native::levelEntityId = reinterpret_cast<unsigned int*>(SELECT_VALUE(0x1BCBCA4, 0x208E1A4, 0x1CD873C));

		native::mp::svs_clients = reinterpret_cast<native::mp::client_t*>(0x4B5CF90);
		native::dedi::svs_clients = reinterpret_cast<native::dedi::client_t*>(0x4A12E90);

		native::g_entities = reinterpret_cast<native::gentity_s*>(SELECT_VALUE(0, 0x1A66E28, 0x191B900));
		native::sp::g_entities = reinterpret_cast<native::sp::gentity_s*>(0x1197AD8);
	}
}