- cleaned up the PointerSubstitution code

Since the only thing it gets used for is swapping out PlayerPawns it can safely skip all global variables that never point to a live player, which allowed to remove quite a bit of code here that stood in the way of scriptifying more content

src/b_bot.h

@@ -116,7 +116,7 @@ public:
 	botinfo_t *botinfo;
 	int spawn_tries;
 	int wanted_botnum;
-	TObjPtr<AActor*> firstthing;
+	TObjPtr<AInventory*> firstthing;
 	TObjPtr<AActor*>	body1;
 	TObjPtr<AActor*> body2;
 

src/d_player.h

@@ -372,7 +372,6 @@ public:
 	player_t &operator= (const player_t &p);
 
 	void Serialize(FSerializer &arc);
-	size_t FixPointers (const DObject *obj, DObject *replacement);
 	size_t PropagateMark();
 
 	void SetLogNumber (int num);

src/dobject.cpp

@@ -307,7 +307,6 @@ DObject::~DObject ()
 			if (!(ObjectFlags & OF_Released))
 			{
 				// Find all pointers that reference this object and NULL them.
-				StaticPointerSubstitution(this, NULL);
 				Release();
 			}
 		}
@@ -478,11 +477,15 @@ size_t DObject::PointerSubstitution (DObject *old, DObject *notOld)
 
 //==========================================================================
 //
-//
+// This once was the main method for pointer cleanup, but
+// nowadays its only use is swapping out PlayerPawns.
+// This requires pointer fixing throughout all objects and a few
+// global variables, but it only needs to look at pointers that
+// can point to a player.
 //
 //==========================================================================
 
-size_t DObject::StaticPointerSubstitution (DObject *old, DObject *notOld, bool scandefaults)
+size_t DObject::StaticPointerSubstitution (AActor *old, AActor *notOld)
 {
 	DObject *probe;
 	size_t changed = 0;
@@ -497,24 +500,12 @@ size_t DObject::StaticPointerSubstitution (DObject *old, DObject *notOld, bool s
 		last = probe;
 	}
 
-	if (scandefaults)
-	{
-		for (auto p : PClassActor::AllActorClasses)
-		{
-			auto def = GetDefaultByType(p);
-			if (def != nullptr)
-			{
-				def->DObject::PointerSubstitution(old, notOld);
-			}
-		}
-	}
-
 	// Go through the bodyque.
 	for (i = 0; i < BODYQUESIZE; ++i)
 	{
 		if (bodyque[i] == old)
 		{
-			bodyque[i] = static_cast<AActor *>(notOld);
+			bodyque[i] = notOld;
 			changed++;
 		}
 	}
@@ -523,36 +514,25 @@ size_t DObject::StaticPointerSubstitution (DObject *old, DObject *notOld, bool s
 	for (i = 0; i < MAXPLAYERS; i++)
 	{
 		if (playeringame[i])
-			changed += players[i].FixPointers (old, notOld);
-	}
+		{
+			APlayerPawn *replacement = static_cast<APlayerPawn *>(notOld);
+			auto &p = players[i];
 			
-	for (auto &s : level.sectorPortals)
-	{
-		if (s.mSkybox == old)
-		{
-			s.mSkybox = static_cast<AActor*>(notOld);
-			changed++;
+			if (p.mo == old)					p.mo = replacement, changed++;
+			if (p.poisoner.pp == old)			p.poisoner = replacement, changed++;
+			if (p.attacker.pp == old)			p.attacker = replacement, changed++;
+			if (p.camera.pp == old)				p.camera = replacement, changed++;
+			if (p.ConversationNPC.pp == old)	p.ConversationNPC = replacement, changed++;
+			if (p.ConversationPC == old)		p.ConversationPC = replacement, changed++;
 		}
 	}
 
 	// Go through sectors.
 	for (auto &sec : level.sectors)
 	{
-#define SECTOR_CHECK(f,t) \
-if (sec.f.pp == static_cast<t *>(old)) { sec.f = static_cast<t *>(notOld); changed++; }
-		SECTOR_CHECK( SoundTarget, AActor );
-		SECTOR_CHECK( SecActTarget, AActor );
-		SECTOR_CHECK( floordata, DSectorEffect );
-		SECTOR_CHECK( ceilingdata, DSectorEffect );
-		SECTOR_CHECK( lightingdata, DSectorEffect );
-#undef SECTOR_CHECK
+		if (sec.SoundTarget == old) sec.SoundTarget = notOld;
 	}
 
-	// Go through bot stuff.
-	if (bglobal.firstthing.pp == (AActor *)old)		bglobal.firstthing = (AActor *)notOld, ++changed;
-	if (bglobal.body1.pp == (AActor *)old)			bglobal.body1 = (AActor *)notOld, ++changed;
-	if (bglobal.body2.pp == (AActor *)old)			bglobal.body2 = (AActor *)notOld, ++changed;
-
 	return changed;
 }
 

src/dobject.h

@@ -185,6 +185,8 @@ protected: \
 
 #include "dobjgc.h"
 
+class AActor;
+
 class DObject
 {
 public:
@@ -249,11 +251,9 @@ public:
 	inline FString &StringVar(FName field);
 	template<class T> T*& PointerVar(FName field);
 
-	// If you need to replace one object with another and want to
-	// change any pointers from the old object to the new object,
-	// use this method.
+	// This is only needed for swapping out PlayerPawns and absolutely nothing else!
 	virtual size_t PointerSubstitution (DObject *old, DObject *notOld);
-	static size_t StaticPointerSubstitution (DObject *old, DObject *notOld, bool scandefaults = false);
+	static size_t StaticPointerSubstitution (AActor *old, AActor *notOld);
 
 	PClass *GetClass() const
 	{

src/p_user.cpp

@@ -396,38 +396,6 @@ player_t &player_t::operator=(const player_t &p)
 	return *this;
 }
 
-// This function supplements the pointer cleanup in dobject.cpp, because
-// player_t is not derived from DObject. (I tried it, and DestroyScan was
-// unable to properly determine the player object's type--possibly
-// because it gets staticly allocated in an array.)
-//
-// This function checks all the DObject pointers in a player_t and NULLs any
-// that match the pointer passed in. If you add any pointers that point to
-// DObject (or a subclass), add them here too.
-
-size_t player_t::FixPointers (const DObject *old, DObject *rep)
-{
-	APlayerPawn *replacement = static_cast<APlayerPawn *>(rep);
-	size_t changed = 0;
-
-	// The construct *& is used in several of these to avoid the read barriers
-	// that would turn the pointer we want to check to NULL if the old object
-	// is pending deletion.
-	if (mo == old)					mo = replacement, changed++;
-	if (*&poisoner == old)			poisoner = replacement, changed++;
-	if (*&attacker == old)			attacker = replacement, changed++;
-	if (*&camera == old)			camera = replacement, changed++;
-	if (*&Bot == old)				Bot = static_cast<DBot *>(rep), changed++;
-	if (ReadyWeapon == old)			ReadyWeapon = static_cast<AWeapon *>(rep), changed++;
-	if (PendingWeapon == old)		PendingWeapon = static_cast<AWeapon *>(rep), changed++;
-	if (*&PremorphWeapon == old)	PremorphWeapon = static_cast<AWeapon *>(rep), changed++;
-	if (psprites == old)			psprites = static_cast<DPSprite *>(rep), changed++;
-	if (*&ConversationNPC == old)	ConversationNPC = replacement, changed++;
-	if (*&ConversationPC == old)	ConversationPC = replacement, changed++;
-	if (*&MUSINFOactor == old)		MUSINFOactor = replacement, changed++;
-	return changed;
-}
-
 size_t player_t::PropagateMark()
 {
 	GC::Mark(mo);

src/r_data/r_interpolate.cpp

@@ -67,7 +67,6 @@ public:
 	void Interpolate(double smoothratio);
 	
 	virtual void Serialize(FSerializer &arc);
-	size_t PointerSubstitution (DObject *old, DObject *notOld);
 	size_t PropagateMark();
 };
 
@@ -535,25 +534,6 @@ void DSectorPlaneInterpolation::Serialize(FSerializer &arc)
 		("attached", attached);
 }
 
-//==========================================================================
-//
-//
-//
-//==========================================================================
-
-size_t DSectorPlaneInterpolation::PointerSubstitution (DObject *old, DObject *notOld)
-{
-	int subst = 0;
-	for(unsigned i=0; i<attached.Size(); i++)
-	{
-		if (attached[i] == old) 
-		{
-			attached[i] = (DInterpolation*)notOld;
-			subst++;
-		}
-	}
-	return subst;
-}
 
 //==========================================================================
 //

src/scripting/backend/vmbuilder.cpp

@@ -1048,7 +1048,7 @@ void FunctionCallEmitter::AddParameterStringConst(const FString &konst)
 
 ExpEmit FunctionCallEmitter::EmitCall(VMFunctionBuilder *build, TArray<ExpEmit> *ReturnRegs)
 {
-	int paramcount = 0;
+	unsigned paramcount = 0;
 	for (auto &func : emitters)
 	{
 		paramcount += func(build);