Method BuildFlatPointers

source/common/objects/dobjtype.cpp:769–846

//==========================================================================

void PClass::BuildFlatPointers() const
{
	using pairType = std::pair<size_t, PObjectPointer *>;

	if (FlatPointers != nullptr)
	{ // Already built: Do nothing.
		return;
	}
	else
	{
		TArray<pairType> NativePointers;
		if (Pointers != nullptr)
		{
			for (size_t i = 0; Pointers[i] != ~(size_t)0; i++)
			{
				NativePointers.Push({Pointers[i], nullptr}); // native pointers have a null type
			}
		}

		if (ParentClass == nullptr)
		{ // No parent (i.e. DObject): FlatPointers is the same as Pointers.
			if (NativePointers.Size() == 0)
			{ // No pointers: Make FlatPointers a harmless non-nullptr.
				FlatPointers = (pairType*)(&TheEnd);
				FlatPointersSize = 0;
			}
			else
			{
				pairType *flat = (pairType*)ClassDataAllocator.Alloc(sizeof(pairType) * NativePointers.Size());
				memcpy(flat, NativePointers.Data(), sizeof(pairType) * NativePointers.Size());

				FlatPointers = flat;
				FlatPointersSize = NativePointers.Size();
			}
		}
		else
		{
			ParentClass->BuildFlatPointers();

			TArray<pairType> ScriptPointers;

			// Collect all pointers in scripted fields. These are not part of the Pointers list.
			for (auto field : Fields)
			{
				if (!(field->Flags & VARF_Native))
				{
					field->Type->SetPointer(Defaults, unsigned(field->Offset), &ScriptPointers);
				}
			}

			if (NativePointers.Size() == 0 && ScriptPointers.Size() == 0)
			{ // No new pointers: Just use the same FlatPointers as the parent.
				FlatPointers = ParentClass->FlatPointers;
				FlatPointersSize = ParentClass->FlatPointersSize;
			}
			else
			{	// New pointers: Create a new FlatPointers array and add them.
				// Concatenate them into a new array