123 lines
4.4 KiB
C++
123 lines
4.4 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "CoreMinimal.h"
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#include "Misc/Guid.h"
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#include "Serialization/CustomVersion.h"
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#include "UObject/UObjectBaseUtility.h"
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#include "UObject/Package.h"
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#include "UObject/LinkerLoad.h"
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/**
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* Returns the UE4 version of the linker for this object.
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*
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* @return the UE4 version of the engine's package file when this object
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* was last saved, or GPackageFileUE4Version (current version) if
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* this object does not have a linker, which indicates that
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* a) this object is a native only class, or
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* b) this object's linker has been detached, in which case it is already fully loaded
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*/
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int32 UObjectBaseUtility::GetLinkerUE4Version() const
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{
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FLinkerLoad* Loader = GetLinker();
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// No linker.
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if (Loader == nullptr)
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{
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// the _Linker reference is never set for the top-most UPackage of a package (the linker root), so if this object
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// is the linker root, find our loader in the global list.
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if (GetOutermost() == this)
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{
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Loader = FLinkerLoad::FindExistingLinkerForPackage(const_cast<UPackage*>(CastChecked<UPackage>((const UObject*)this)));
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}
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}
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if (Loader != nullptr)
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{
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// We have a linker so we can return its version.
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return Loader->UE4Ver();
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}
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else if (GetOutermost())
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{
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// Get the linker version associated with the package this object lives in
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return GetOutermost()->LinkerPackageVersion;
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}
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else
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{
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// We don't have a linker associated as we e.g. might have been saved or had loaders reset, ...
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return GPackageFileUE4Version;
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}
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}
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int32 UObjectBaseUtility::GetLinkerCustomVersion(FGuid CustomVersionKey) const
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{
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FLinkerLoad* Loader = GetLinker();
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// No linker.
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if (Loader == NULL)
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{
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// the _Linker reference is never set for the top-most UPackage of a package (the linker root), so if this object
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// is the linker root, find our loader in the global list.
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if (GetOutermost() == this)
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{
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Loader = FLinkerLoad::FindExistingLinkerForPackage(const_cast<UPackage*>(CastChecked<UPackage>((const UObject*)this)));
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}
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}
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if (Loader != NULL)
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{
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// We have a linker so we can return its version.
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const FCustomVersion* CustomVersion = Loader->Summary.GetCustomVersionContainer().GetVersion(CustomVersionKey);
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return CustomVersion ? CustomVersion->Version : -1;
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}
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else if (GetOutermost() && GetOutermost()->LinkerCustomVersion.GetAllVersions().Num())
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{
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// Get the linker version associated with the package this object lives in
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const FCustomVersion* CustomVersion = GetOutermost()->LinkerCustomVersion.GetVersion(CustomVersionKey);
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return CustomVersion ? CustomVersion->Version : -1;
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}
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// We don't have a linker associated as we e.g. might have been saved or had loaders reset, ...
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// We must have a current version for this tag.
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return FCurrentCustomVersions::Get(CustomVersionKey).GetValue().Version;
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}
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/**
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* Returns the licensee version of the linker for this object.
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*
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* @return the licensee version of the engine's package file when this object
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* was last saved, or GPackageFileLicenseeVersion (current version) if
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* this object does not have a linker, which indicates that
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* a) this object is a native only class, or
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* b) this object's linker has been detached, in which case it is already fully loaded
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*/
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int32 UObjectBaseUtility::GetLinkerLicenseeUE4Version() const
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{
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FLinkerLoad* Loader = GetLinker();
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// No linker.
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if (Loader == NULL)
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{
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// the _Linker reference is never set for the top-most UPackage of a package (the linker root), so if this object
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// is the linker root, find our loader in the global list.
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if (GetOutermost() == this)
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{
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Loader = FLinkerLoad::FindExistingLinkerForPackage(const_cast<UPackage*>(CastChecked<UPackage>((const UObject*)this)));
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}
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}
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if (Loader != NULL)
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{
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// We have a linker so we can return its version.
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return Loader->LicenseeUE4Ver();
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}
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else if (GetOutermost())
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{
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// Get the linker version associated with the package this object lives in
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return GetOutermost()->LinkerLicenseeVersion;
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}
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else
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{
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// We don't have a linker associated as we e.g. might have been saved or had loaders reset, ...
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return GPackageFileLicenseeUE4Version;
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}
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}
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