C++ UScriptStruct::InitializeStruct方法代码示例

void UDataTable::LoadStructData(FArchive& Ar)
{
    UScriptStruct* LoadUsingStruct = RowStruct;
    if (LoadUsingStruct == NULL)
    {
        UE_LOG(LogDataTable, Error, TEXT("Missing RowStruct while loading DataTable '%s'!"), *GetPathName());
        LoadUsingStruct = FTableRowBase::StaticStruct();
    }

    int32 NumRows;
    Ar << NumRows;

    for (int32 RowIdx = 0; RowIdx < NumRows; RowIdx++)
    {
        // Load row name
        FName RowName;
        Ar << RowName;

        // Load row data
        uint8* RowData = (uint8*)FMemory::Malloc(LoadUsingStruct->PropertiesSize);
        LoadUsingStruct->InitializeStruct(RowData);
        // And be sure to call DestroyScriptStruct later
        LoadUsingStruct->SerializeTaggedProperties(Ar, RowData, LoadUsingStruct, NULL);

        // Add to map
        RowMap.Add(RowName, RowData);
    }
}

FGameplayAbilityTargetDataHandle UAbilitySystemBlueprintLibrary::FilterTargetData(FGameplayAbilityTargetDataHandle TargetDataHandle, FGameplayTargetDataFilterHandle FilterHandle)
{
	FGameplayAbilityTargetDataHandle ReturnDataHandle;
	
	for (int32 i = 0; TargetDataHandle.IsValid(i); ++i)
	{
		FGameplayAbilityTargetData* UnfilteredData = TargetDataHandle.Get(i);
		check(UnfilteredData);
		if (UnfilteredData->GetActors().Num() > 0)
		{
			TArray<TWeakObjectPtr<AActor>> FilteredActors = UnfilteredData->GetActors().FilterByPredicate(FilterHandle);
			if (FilteredActors.Num() > 0)
			{
				//Copy the data first, since we don't understand the internals of it
				UScriptStruct* ScriptStruct = UnfilteredData->GetScriptStruct();
				FGameplayAbilityTargetData* NewData = (FGameplayAbilityTargetData*)FMemory::Malloc(ScriptStruct->GetCppStructOps()->GetSize());
				ScriptStruct->InitializeStruct(NewData);
				ScriptStruct->CopyScriptStruct(NewData, UnfilteredData);
				ReturnDataHandle.Data.Add(TSharedPtr<FGameplayAbilityTargetData>(NewData));
				if (FilteredActors.Num() < UnfilteredData->GetActors().Num())
				{
					//We have lost some, but not all, of our actors, so replace the array. This should only be possible with targeting types that permit actor-array setting.
					if (!NewData->SetActors(FilteredActors))
					{
						//This is an error, though we could ignore it. We somehow filtered out part of a list, but the class doesn't support changing the list, so now it's all or nothing.
						check(false);
					}
				}
			}
		}
	}

	return ReturnDataHandle;
}

bool FGameplayEffectContextHandle::NetSerialize(FArchive& Ar, class UPackageMap* Map, bool& bOutSuccess)
{
	UScriptStruct* ScriptStruct = Data.IsValid() ? Data->GetScriptStruct() : NULL;
	Ar << ScriptStruct;

	if (ScriptStruct)
	{
		if (Ar.IsLoading())
		{
			// For now, just always reset/reallocate the data when loading.
			// Longer term if we want to generalize this and use it for property replication, we should support
			// only reallocating when necessary
			check(!Data.IsValid());

			FGameplayEffectContext * NewData = (FGameplayEffectContext*)FMemory::Malloc(ScriptStruct->GetCppStructOps()->GetSize());
			ScriptStruct->InitializeStruct(NewData);

			Data = TSharedPtr<FGameplayEffectContext>(NewData);
		}

		void* ContainerPtr = Data.Get();

		if (ScriptStruct->StructFlags & STRUCT_NetSerializeNative)
		{
			ScriptStruct->GetCppStructOps()->NetSerialize(Ar, Map, bOutSuccess, Data.Get());
		}
		else
		{
			// This won't work since UStructProperty::NetSerializeItem is deprecrated.
			//	1) we have to manually crawl through the topmost struct's fields since we don't have a UStructProperty for it (just the UScriptProperty)
			//	2) if there are any UStructProperties in the topmost struct's fields, we will assert in UStructProperty::NetSerializeItem.

			ABILITY_LOG(Fatal, TEXT("FGameplayEffectContextHandle::NetSerialize called on data struct %s without a native NetSerialize"), *ScriptStruct->GetName());

			for (TFieldIterator<UProperty> It(ScriptStruct); It; ++It)
			{
				if (It->PropertyFlags & CPF_RepSkip)
				{
					continue;
				}

				void * PropertyData = It->ContainerPtrToValuePtr<void*>(ContainerPtr);

				It->NetSerializeItem(Ar, Map, PropertyData);
			}
		}
	}

	bOutSuccess = true;
	return true;
}

bool FGameplayAbilityTargetDataHandle::NetSerialize(FArchive& Ar, class UPackageMap* Map, bool& bOutSuccess)
{
	uint8 DataNum;
	if (Ar.IsSaving())
	{
		UE_CLOG(Data.Num() > MAX_uint8, LogAbilitySystem, Warning, TEXT("Too many TargetData sources (%d!) to net serialize. Clamping to %d"), Data.Num(), MAX_uint8);
		DataNum = FMath::Min<int32>( Data.Num(), MAX_uint8 );
	}
	Ar << DataNum;
	if (Ar.IsLoading())
	{
		Data.SetNumZeroed(DataNum);
	}

	for (int32 i = 0; i < DataNum && !Ar.IsError(); ++i)
	{
		UScriptStruct* ScriptStruct = Data[i].IsValid() ? Data[i]->GetScriptStruct() : NULL;
		Ar << ScriptStruct;

		if (ScriptStruct)
		{
			if (Ar.IsLoading())
			{
				// For now, just always reset/reallocate the data when loading.
				// Longer term if we want to generalize this and use it for property replication, we should support
				// only reallocating when necessary
				check(!Data[i].IsValid());

				FGameplayAbilityTargetData * NewData = (FGameplayAbilityTargetData*)FMemory::Malloc(ScriptStruct->GetCppStructOps()->GetSize());
				ScriptStruct->InitializeStruct(NewData);

				Data[i] = TSharedPtr<FGameplayAbilityTargetData>(NewData);
			}

			void* ContainerPtr = Data[i].Get();

			if (ScriptStruct->StructFlags & STRUCT_NetSerializeNative)
			{
				ScriptStruct->GetCppStructOps()->NetSerialize(Ar, Map, bOutSuccess, Data[i].Get());
			}
			else
			{
				// This won't work since UStructProperty::NetSerializeItem is deprecrated.
				//	1) we have to manually crawl through the topmost struct's fields since we don't have a UStructProperty for it (just the UScriptProperty)
				//	2) if there are any UStructProperties in the topmost struct's fields, we will assert in UStructProperty::NetSerializeItem.

				ABILITY_LOG(Fatal, TEXT("FGameplayAbilityTargetDataHandle::NetSerialize called on data struct %s without a native NetSerialize"), *ScriptStruct->GetName());

				for (TFieldIterator<UProperty> It(ScriptStruct); It; ++It)
				{
					if (It->PropertyFlags & CPF_RepSkip)
					{
						continue;
					}

					void* PropertyData = It->ContainerPtrToValuePtr<void*>(ContainerPtr);

					It->NetSerializeItem(Ar, Map, PropertyData);
				}
			}
		}
	}

	//ABILITY_LOG(Warning, TEXT("FGameplayAbilityTargetDataHandle Serialized: %s"), ScriptStruct ? *ScriptStruct->GetName() : TEXT("NULL") );

	bOutSuccess = true;
	return true;
}