Backported game hooks from 4.0.x

* COMBATTURN is not implemented.

Updated documents.

artifacts/scripting/headers/define_extra.h

@@ -146,7 +146,7 @@
 //#define RMOBJ_AI_USE_DRUG_ON_2  4360176  // same as RMOBJ_AI_USE_DRUG_ON (obsolete, use only for sfall before 4.3.1/3.8.31)
 #define RMOBJ_BARTER_ARMOR        4675656  // removing armor from NPC's slot before entering the barter screen
 #define RMOBJ_BARTER_WEAPON       4675722  // removing weapon from NPC's slot before entering the barter screen
-#define RMOBJ_INVEN_DROP_CAPS     4667295  // if money/caps are dropped manually by the player from the inventory screen
+#define RMOBJ_INVEN_DROP_CAPS     4667295  // if multiple money/caps are dropped manually by the player from the inventory screen
 #define RMOBJ_DROP_INTO_CONTAINER 4678833  // when dropping items into a container item (bag/backpack)
 // old defines
 #define RMOBJ_RM_MULT_OBJS        RMOBJ_ITEM_REMOVED_MULTI

artifacts/scripting/headers/sfall.h

@@ -52,6 +52,10 @@
 #define HOOK_INVENTORYMOVE    (24)
 #define HOOK_INVENWIELD       (25)
 #define HOOK_ADJUSTFID        (26)
+//#define HOOK_COMBATTURN     (27) // unimplemented
+#define HOOK_CARTRAVEL        (28)
+#define HOOK_SETGLOBALVAR     (29)
+#define HOOK_RESTTIMER        (30)
 #define HOOK_GAMEMODECHANGE   (31)
 
 // Valid arguments to list_begin

artifacts/scripting/hookscripts.md

@@ -582,6 +582,48 @@ int     ret0 - overrides the calculated FID with provided value
 
 -------------------------------------------
 
+#### `HOOK_CARTRAVEL (hs_cartravel.int)`
+
+Runs continuously during worldmap travel on car.
+
+```
+int     arg0 - vanilla car speed (between 3 and 8 "steps")
+int     arg1 - vanilla fuel consumption (100 and below)
+
+int     ret0 - car speed override (pass -1 if you just want to override fuel consumption)
+int     ret1 - fuel consumption override
+```
+
+-------------------------------------------
+
+#### `HOOK_SETGLOBALVAR (hs_setglobalvar.int)`
+
+Runs when setting the value of a global variable.
+
+```
+int     arg0 - the index number of the global variable being set
+int     arg1 - the set value of the global variable
+
+int     ret0 - overrides the value of the global variable
+```
+
+-------------------------------------------
+
+#### `HOOK_RESTTIMER (hs_resttimer.int)`
+
+Runs continuously while the player is resting (using pipboy alarm clock).
+
+```
+int     arg0 - the game time in ticks
+int     arg1 - event type: 1 - when the resting ends normally, -1 - when pressing ESC to cancel the timer, 0 - otherwise
+int     arg2 - the hour part of the length of resting time
+int     arg3 - the minute part of the length of resting time
+
+int     ret0 - pass 1 to interrupt the resting, pass 0 to continue the rest if it was interrupted by pressing ESC key
+```
+
+-------------------------------------------
+
 #### `HOOK_GAMEMODECHANGE (hs_gamemodechange.int)`
 
 Runs once every time when the game mode was changed, like opening/closing the inventory, character screen, pipboy, etc.

sfall/FalloutEngine/FunctionOffsets_def.h

@@ -732,6 +732,7 @@ FUNC(windowOutput_,                   0x4B80A4)
 FUNC(windowShow_,                     0x4B7648)
 FUNC(windowWidth_,                    0x4B7734)
 FUNC(windowWrapLineWithSpacing_,      0x4B8854)
+FUNC(wmCarUseGas_,                    0x4C4DA4)
 FUNC(wmDrawCursorStopped_,            0x4C41EC)
 FUNC(wmEvalTileNumForPlacement_,      0x4C1A64)
 FUNC(wmFindCurSubTileFromPos_,        0x4C0C00)

sfall/FalloutEngine/Functions_def.h

@@ -58,8 +58,6 @@ WRAP_WATCOM_FFUNC4(void, register_object_call, long*, target, long*, source, voi
 WRAP_WATCOM_FFUNC3(long, scr_get_local_var, long, sid, long, varId, long*, value)
 WRAP_WATCOM_FFUNC3(long, scr_set_local_var, long, sid, long, varId, long, value)
 WRAP_WATCOM_FFUNC6(long, text_object_create, fo::GameObject*, object, const char*, text, long, font, long, colorText, long, colorOutline, fo::BoundRect*, rect)
-WRAP_WATCOM_FFUNC3(long, tile_coord, long, tile, long*, outX, long*, outY) // the fourth argument of the function is not used
-WRAP_WATCOM_FFUNC3(long, tile_num_in_direction, long, tile, long, rotation, long, distance)
 WRAP_WATCOM_FFUNC8(void, trans_cscale, void*, fromBuff, long, width, long, height, long, fromPitch, void*, toBuff, long, toWidth, long, toHeight, long, toPitch)
 WRAP_WATCOM_FFUNC3(void, win_clip, fo::Window*, window, fo::RectList**, rects, void*, buffer)
 WRAP_WATCOM_FFUNC6(void, win_print, long, winID, const char*, text, long, textWidth, long, xPos, long, yPos, long, colorFlags)
@@ -99,6 +97,7 @@ WRAP_WATCOM_FUNC2(void, executeProcedure, fo::Program*, sptr, long, procNum)
 WRAP_WATCOM_FUNC1(long, folder_print_line, const char*, text)
 WRAP_WATCOM_FUNC1(const char*, findCurrentProc, fo::Program*, program) // Returns the name of current procedure by program pointer
 WRAP_WATCOM_FUNC1(long, FMtext_width, const char*, text)
+WRAP_WATCOM_FUNC1(long, game_get_global_var, long, globalVar)
 WRAP_WATCOM_FUNC0(long, get_input)
 // Searches for message ID in given message file and places result in result argument
 WRAP_WATCOM_FUNC3(const char*, getmsg, const fo::MessageList*, fileAddr, fo::MessageNode*, result, long, messageId)
@@ -222,9 +221,11 @@ WRAP_WATCOM_FUNC2(void, skill_set_tags, long*, tags, long, num)
 WRAP_WATCOM_FUNC2(long, stat_level, fo::GameObject*, critter, long, statId)
 WRAP_WATCOM_FUNC1(void, stat_pc_add_experience, long, amount) // Adds experience points to PC
 WRAP_WATCOM_FUNC1(long, text_font, long, fontNum)
+WRAP_WATCOM_FUNC3(long, tile_coord, long, tile, long*, outX, long*, outY) // the fourth argument of the function is not used
 WRAP_WATCOM_FUNC2(long, tile_dist, long, scrTile, long, dstTile)
 WRAP_WATCOM_FUNC2(long, tile_dir, long, scrTile, long, dstTile)
 WRAP_WATCOM_FUNC2(long, tile_idistance, long, sourceTile, long, targetTile)
+WRAP_WATCOM_FUNC3(long, tile_num_in_direction, long, tile, long, rotation, long, distance)
 WRAP_WATCOM_FUNC1(long, tile_on_edge, long, tile)
 WRAP_WATCOM_FUNC0(void, tile_refresh_display) // Redraws the whole screen
 WRAP_WATCOM_FUNC2(void, tile_refresh_rect, fo::BoundRect*, boundRect, long, elevation) // Redraws the given rectangle on screen
@@ -237,7 +238,9 @@ WRAP_WATCOM_FUNC1(BYTE*, win_get_buf, DWORD, winRef)
 WRAP_WATCOM_FUNC1(void, win_hide, DWORD, winRef)
 WRAP_WATCOM_FUNC1(void, win_show, DWORD, winRef)
 WRAP_WATCOM_FUNC0(long, windowWidth)
+WRAP_WATCOM_FUNC1(void, wmCarUseGas, long, gasAmount)
 WRAP_WATCOM_FUNC1(long, wmEvalTileNumForPlacement, long, tile)
+WRAP_WATCOM_FUNC0(void, wmPartyWalkingStep)
 WRAP_WATCOM_FUNC1(void, wmRefreshInterfaceOverlay, long, isRedraw)
 
 /* Database functions */

sfall/Modules/HookScripts.cpp

@@ -90,9 +90,9 @@ static HooksInjectInfo injectHooks[] = {
 	{HOOK_INVENWIELD,       Inject_InvenWieldHook,       false},
 	{HOOK_ADJUSTFID,        nullptr,                      true}, // always embedded to the engine
 	{-1,                    nullptr,                     false}, // dummy
-	{-1,                    nullptr,                     false}, // dummy
-	{-1,                    nullptr,                     false}, // dummy
-	{-1,                    nullptr,                     false}, // dummy
+	{HOOK_CARTRAVEL,        Inject_CarTravelHook,        false},
+	{HOOK_SETGLOBALVAR,     Inject_SetGlobalVarHook,     false},
+	{HOOK_RESTTIMER,        Inject_RestTimerHook,        false},
 	{HOOK_GAMEMODECHANGE,   nullptr,                      true}, // always embedded to the engine
 };
 

sfall/Modules/HookScripts.h

@@ -51,8 +51,12 @@ enum HookType
 	HOOK_WITHINPERCEPTION = 23,
 	HOOK_INVENTORYMOVE    = 24,
 	HOOK_INVENWIELD       = 25,
-	HOOK_ADJUSTFID        = 26, // 4.x backport
-	HOOK_GAMEMODECHANGE   = 31, // 4.x backport
+	HOOK_ADJUSTFID        = 26,
+	HOOK_COMBATTURN       = 27, // unimplemented
+	HOOK_CARTRAVEL        = 28,
+	HOOK_SETGLOBALVAR     = 29,
+	HOOK_RESTTIMER        = 30,
+	HOOK_GAMEMODECHANGE   = 31,
 	HOOK_COUNT
 };
 

sfall/Modules/HookScripts/Common.cpp

@@ -62,6 +62,20 @@ void __stdcall HookCommon::SetHSReturn(DWORD value) {
 	}
 }
 
+// List of hooks that are not allowed to be called recursively
+static bool CheckRecursiveHooks(DWORD hook) {
+	if (hook == currentRunHook) {
+		switch (hook) {
+		case HOOK_SETGLOBALVAR:
+//		case HOOK_SETLIGHTING:
+			return true;
+		default:
+			if (isDebug) fo::func::debug_printf("\nWARNING: A recursive hook with ID %d was running.", hook);
+		}
+	}
+	return false;
+}
+
 void __stdcall BeginHook() {
 	if (callDepth && callDepth <= maxDepth) {
 		// save all values of the current hook if another hook was called during the execution of the current hook
@@ -97,10 +111,12 @@ static void __stdcall RunSpecificHookScript(HookScript *hook) {
 void __stdcall RunHookScript(DWORD hook) {
 	cRet = 0;
 	if (!hooks[hook].empty()) {
-		if (callDepth > 8) {
-			fo::func::debug_printf("\n[SFALL] The hook ID: %d cannot be executed.", hook);
-			dlog_f("The hook %d cannot be executed due to exceeding depth limit\n", DL_MAIN, hook);
-			return;
+		if (callDepth > 1) {
+			if (CheckRecursiveHooks(hook) || callDepth > 8) {
+				fo::func::debug_printf("\n[SFALL] The hook ID: %d cannot be executed.", hook);
+				dlog_f("The hook %d cannot be executed due to exceeding depth limit or disallowed recursive calls\n", DL_MAIN, hook);
+				return;
+			}
 		}
 		currentRunHook = hook;
 		size_t hooksCount = hooks[hook].size();

sfall/Modules/HookScripts/MiscHs.cpp

@@ -226,6 +226,167 @@ static void __declspec(naked) PerceptionSearchTargetHook() {
 	}
 }
 
+static const long maxGasAmount = 80000;
+
+static void CarTravelHook_Script() {
+	BeginHook();
+	argCount = 2;
+
+	// calculate vanilla speed
+	int carSpeed = 3;
+	if (fo::func::game_get_global_var(fo::GVAR_CAR_BLOWER)) {
+		carSpeed += 1;
+	}
+	if (fo::func::game_get_global_var(fo::GVAR_NEW_RENO_CAR_UPGRADE)) {
+		carSpeed += 1;
+	}
+	if (fo::func::game_get_global_var(fo::GVAR_NEW_RENO_SUPER_CAR)) {
+		carSpeed += 3;
+	}
+	// calculate vanilla fuel consumption
+	int originalGas = *fo::ptr::carGasAmount;
+	*fo::ptr::carGasAmount = maxGasAmount;
+	fo::func::wmCarUseGas(100);
+	int consumption = maxGasAmount - *fo::ptr::carGasAmount;
+
+	// run script
+	args[0] = carSpeed;
+	args[1] = consumption;
+	RunHookScript(HOOK_CARTRAVEL);
+
+	// override travel speed
+	if (cRet > 0 && static_cast<long>(rets[0]) >= 0) {
+		carSpeed = rets[0];
+	}
+	// move car on map
+	for (int i = 0; i < carSpeed; ++i) {
+		fo::func::wmPartyWalkingStep();
+	}
+
+	// override fuel consumption
+	if (cRet > 1) {
+		consumption = static_cast<long>(rets[1]);
+	}
+	// consume fuel
+	*fo::ptr::carGasAmount = max(0, originalGas - consumption); // Note: the reverse breaks the result in VS2010
+
+	EndHook();
+}
+
+static void __declspec(naked) CarTravelHack() {
+	static const DWORD CarTravelHack_back = 0x4BFF43;
+	__asm {
+		pushad;
+		call CarTravelHook_Script;
+		popad;
+		jmp CarTravelHack_back;
+	}
+}
+
+static long __fastcall GlobalVarHook_Script(register DWORD number, register int value) {
+	int old = (*fo::ptr::game_global_vars)[number];
+
+	if (IsGameLoaded() && HookScripts::HookHasScript(HOOK_SETGLOBALVAR)) { // IsGameLoaded - don't execute hook until loading sfall scripts
+		BeginHook();
+		argCount = 2;
+		args[0] = number;
+		args[1] = value;
+
+		RunHookScript(HOOK_SETGLOBALVAR);
+		if (cRet > 0) value = rets[0];
+		EndHook();
+	}
+	if (number == fo::GVAR_PLAYER_REPUTATION && displayKarmaChanges) {
+		int diff = value - old;
+		if (diff != 0) Karma::DisplayKarma(diff);
+	}
+	return value;
+}
+
+static void __declspec(naked) SetGlobalVarHook() {
+	__asm {
+		push eax;
+		push ecx;
+		push edx;
+		mov  ecx, eax;             // number
+		call GlobalVarHook_Script; // edx - value
+		pop  edx;
+		pop  ecx;
+		cmp  eax, edx;             // if return value != set value
+		cmovne edx, eax;
+		pop  eax;
+		jmp  fo::funcoffs::game_set_global_var_;
+	}
+}
+
+static int restTicks;
+
+static long __fastcall RestTimerHook_Script(DWORD hours, DWORD minutes, DWORD gameTime, DWORD addrHook) {
+	addrHook -= 5;
+
+	BeginHook();
+	argCount = 4;
+
+	args[0] = gameTime;
+	args[2] = hours;
+	args[3] = minutes;
+
+	if (addrHook == 0x499CA1 || addrHook == 0x499B63) {
+		args[0] = restTicks;
+		args[1] = -1;
+	} else {
+		restTicks = args[0];
+		args[1] = (addrHook == 0x499DF2 || (args[2] == 0 && addrHook == 0x499BE0)) ? 1 : 0;
+	}
+	RunHookScript(HOOK_RESTTIMER);
+
+	long result = -1;
+	if (cRet > 0) {
+		result = (rets[0] != 0) ? 1 : 0;
+	}
+	EndHook();
+
+	return result;
+}
+
+static void __declspec(naked) RestTimerLoopHook() {
+	__asm {
+		pushadc;
+		mov  edx, [esp + 16 + 0x44]; // minutes_
+		mov  ecx, [esp + 16 + 0x40]; // hours_
+		push [esp + 12];             // addrHook
+		push eax;                    // gameTime
+		call RestTimerHook_Script;
+		pop  ecx;
+		pop  edx;
+		test eax, eax;   // result >= 0
+		cmovge edi, eax; // return 1 to interrupt resting
+		pop  eax;
+		jmp  fo::funcoffs::set_game_time_;
+	}
+}
+
+static void __declspec(naked) RestTimerEscapeHook() {
+	__asm {
+		mov  edi, 1;    // engine code
+		cmp  eax, 0x1B; // ESC ASCII code
+		jnz  skip;
+		pushadc;
+		mov  edx, [esp + 16 + 0x44]; // minutes_
+		mov  ecx, [esp + 16 + 0x40]; // hours_
+		push [esp + 12];             // addrHook
+		push eax;                    // gameTime
+		call RestTimerHook_Script;
+		pop  ecx;
+		pop  edx;
+		test eax, eax;   // result >= 0
+		cmovge edi, eax; // return 0 for cancel ESC key
+		pop  eax;
+skip:
+		retn;
+	}
+}
+
 void Inject_BarterPriceHook() {
 	const DWORD barterPriceHkAddr[] = {
 		0x474D4C, // barter_attempt_transaction_ (offers button)
@@ -261,11 +422,30 @@ void Inject_WithinPerceptionHook() {
 	HookCall(0x458403, PerceptionRangeHearHook);
 }
 
+void Inject_CarTravelHook() {
+	MakeJump(0x4BFEF1, CarTravelHack);
+	BlockCall(0x4BFF6E); // vanilla wmCarUseGas(100) call
+}
+
+void Inject_SetGlobalVarHook() {
+	HookCall(0x455A6D, SetGlobalVarHook);
+}
+
+void Inject_RestTimerHook() {
+	const DWORD restTimerLoopHkAddr[] = {0x499B4B, 0x499BE0, 0x499D2C, 0x499DF2};
+	HookCalls(RestTimerLoopHook, restTimerLoopHkAddr);
+	const DWORD restTimerEscHkAddr[] = {0x499B63, 0x499CA1};
+	MakeCalls(RestTimerEscapeHook, restTimerEscHkAddr);
+}
+
 void InitMiscHookScripts() {
 	HookScripts::LoadHookScript("hs_barterprice", HOOK_BARTERPRICE);
 	HookScripts::LoadHookScript("hs_useskill", HOOK_USESKILL);
 	HookScripts::LoadHookScript("hs_steal", HOOK_STEAL);
 	HookScripts::LoadHookScript("hs_withinperception", HOOK_WITHINPERCEPTION);
+	HookScripts::LoadHookScript("hs_cartravel", HOOK_CARTRAVEL);
+	HookScripts::LoadHookScript("hs_setglobalvar", HOOK_SETGLOBALVAR);
+	HookScripts::LoadHookScript("hs_resttimer", HOOK_RESTTIMER);
 }
 
 }

sfall/Modules/HookScripts/MiscHs.h

@@ -9,6 +9,9 @@ void Inject_BarterPriceHook();
 void Inject_UseSkillHook();
 void Inject_StealCheckHook();
 void Inject_WithinPerceptionHook();
+void Inject_CarTravelHook();
+void Inject_SetGlobalVarHook();
+void Inject_RestTimerHook();
 
 long PerceptionRangeHook_Invoke(fo::GameObject* watcher, fo::GameObject* target, long type, long result);
 

sfall/Modules/Karma.cpp

@@ -23,6 +23,8 @@
 #include "..\FalloutEngine\Fallout2.h"
 #include "..\Translate.h"
 
+#include "HookScripts.h"
+
 #include "Karma.h"
 
 namespace sfall
@@ -37,6 +39,7 @@ static std::vector<KarmaFrmSetting> karmaFrms;
 
 static char karmaGainMsg[128];
 static char karmaLossMsg[128];
+bool displayKarmaChanges;
 
 static DWORD __stdcall DrawCard() {
 	int reputation = (*fo::ptr::game_global_vars)[fo::GVAR_PLAYER_REPUTATION];
@@ -64,7 +67,7 @@ skip:
 	}
 }
 
-static void __stdcall SetKarma(int value) {
+void Karma::DisplayKarma(int value) {
 	char buf[128];
 	if (value > 0) {
 		sprintf_s(buf, karmaGainMsg, value);
@@ -74,29 +77,13 @@ static void __stdcall SetKarma(int value) {
 	fo::func::display_print(buf);
 }
 
-static void __declspec(naked) SetGlobalVarWrapper() {
-	__asm {
-		test eax, eax; // Gvar number
-		jnz  end;
-		pushadc;
-		call fo::funcoffs::game_get_global_var_;
-		sub  edx, eax; // value -= old
-		jz   skip;
-		push edx;
-		call SetKarma;
-skip:
-		popadc;
-end:
-		jmp  fo::funcoffs::game_set_global_var_;
-	}
-}
-
 static void ApplyDisplayKarmaChangesPatch() {
-	if (IniReader::GetConfigInt("Misc", "DisplayKarmaChanges", 0)) {
+	displayKarmaChanges = IniReader::GetConfigInt("Misc", "DisplayKarmaChanges", 0) != 0;
+	if (displayKarmaChanges) {
 		dlog("Applying display karma changes patch.", DL_INIT);
 		Translate::Get("sfall", "KarmaGain", "You gained %d karma.", karmaGainMsg);
 		Translate::Get("sfall", "KarmaLoss", "You lost %d karma.", karmaLossMsg);
-		HookCall(0x455A6D, SetGlobalVarWrapper);
+		HookScripts::InjectingHook(HOOK_SETGLOBALVAR);
 		dlogr(" Done", DL_INIT);
 	}
 }

sfall/Modules/Karma.h

@@ -25,6 +25,10 @@ class Karma {
 public:
 	static const char* name() { return "Karma"; }
 	static void init();
+
+	static void DisplayKarma(int value);
 };
 
+extern bool displayKarmaChanges;
+
 }