ArchiveOffset.h cstddef cstdint memory DNA.h DNA.h InputArchive.h InputArchive.h OutputArchive.h OutputArchive.h ArchiveOffset.h cstddef cstdint memory DNA.h BinaryStreamReaderImpl.cpp BinaryStreamReaderImpl.h BinaryStreamWriterImpl.cpp BinaryStreamWriterImpl.h FilteredInputArchive.cpp FilteredInputArchive.h JSONStreamReaderImpl.cpp JSONStreamReaderImpl.h JSONStreamWriterImpl.cpp JSONStreamWriterImpl.h CalculateMeshLowerLODsCommand.cpp ClearBlendShapesCommand.cpp PruneBlendShapeTargetsCommand.cpp RemoveJointAnimationCommand.cpp RemoveJointCommand.cpp RemoveMeshCommand.cpp RenameAnimatedMapCommand.cpp RenameBlendShapeCommand.cpp RenameJointCommand.cpp RenameMeshCommand.cpp RenameResourceCommand.h RotateCommand.cpp ScaleCommand.cpp SetBlendShapeTargetDeltasCommand.cpp SetLODsCommand.cpp SetNeutralJointRotationsCommand.cpp SetNeutralJointTranslationsCommand.cpp SetSkinWeightsCommand.cpp SetVertexPositionsCommand.cpp TranslateCommand.cpp BaseImpl.h DNA.h DNACalibDNAReaderImpl.cpp DNACalibDNAReaderImpl.h ReaderImpl.h WriterImpl.h AnimatedMapFilter.cpp BlendShapeFilter.cpp JointFilter.cpp MeshFilter.cpp InputArchive.h OutputArchive.h InputArchive.h OutputArchive.h ArchiveOffset.h terse::ArchiveOffset terse::ArchiveOffset::Proxy terse //CopyrightEpicGames,Inc.AllRightsReserved. #pragmaonce #ifdef_MSC_VER #pragmawarning(push) #pragmawarning(disable:43654987) #endif #include<cstddef> #include<cstdint> #include<memory> #ifdef_MSC_VER #pragmawarning(pop) #endif namespaceterse{ //ArchiveOffsetisatypethatstoresanabsolutestreamoffset(bothin-memoryandwritesthatvalueintothestreamaswell). //IthasanaccompanyingProxytype,whichisavirtual,utilitytype,andtheyworktogethertoachievethefunction //ofArchiveOffset. //WhenArchiveOffsetisencounteredduringtheserializationprocess,atfirstanemptyoffset(zero)valuewillbewritten //intothestreamandthepositionofthatoffsetvaluewillbecapturedinanin-memoryvariable.Later,whenitsassociated //ArchiveOffset<T>::Proxyisencountered,thecurrentstreampositionwillbecaptured,anditwillupdatethein-memoryvalue //ofitsArchiveOffsetwithit.Then,itwillseekthestreamtotheearliercapturedpositionoftheoffsetvalue(wherezeros //werewritteninitially),anditwillwritetheoffsetvaluecapturedbytheproxyintothestream.Lastly,itwillseekback //tothepositionofthestreambeforetheproxywasencountered,andresumeserialization. template<typenameTOffset> structArchiveOffset{ usingValueType=TOffset; structProxy{ ArchiveOffset*target; explicitProxy(ArchiveOffset&ptr):target{std::addressof(ptr)}{ target->proxy=this; } ~Proxy(){ if(target!=nullptr){ target->proxy=nullptr; } } Proxy(constProxy&)=delete; Proxy&operator=(constProxy&)=delete; Proxy(Proxy&&rhs):target{nullptr}{ std::swap(target,rhs.target); target->proxy=this; } Proxy&operator=(Proxy&&rhs){ std::swap(target,rhs.target); target->proxy=this; return*this; } }; //Thepositionofthemarkeritselfinthestream(thisisaruntime-onlyvalue //whichisnotwrittentothefile,neededonlyfortheserializertoknowwhere //toseekwithinthestreamwhenthemarker'sactualvalueneedstobewritten) mutablestd::size_tposition; //Thepositioninthestreamwherethemarkerwantstopoint(thisistheactual //valuethatiswrittentothefile) mutableValueTypevalue; //Whenoffsetismoved,it'sassociatedproxymustbeupdatedaboutthenewaddress Proxy*proxy; ArchiveOffset():position{},value{},proxy{nullptr}{ } ~ArchiveOffset()=default; ArchiveOffset(constArchiveOffset&)=delete; ArchiveOffset&operator=(constArchiveOffset&)=delete; ArchiveOffset(ArchiveOffset&&rhs):position{},value{},proxy{nullptr}{ std::swap(position,rhs.position); std::swap(value,rhs.value); std::swap(proxy,rhs.proxy); //Updateproxywithnewaddress if(proxy!=nullptr){ proxy->target=this; } } ArchiveOffset&operator=(ArchiveOffset&&rhs){ std::swap(position,rhs.position); std::swap(value,rhs.value); std::swap(proxy,rhs.proxy); //Updateproxywithnewaddress if(proxy!=nullptr){ proxy->target=this; } return*this; } }; template<typenameTOffset> typenameArchiveOffset<TOffset>::Proxyproxy(ArchiveOffset<TOffset>&offset){ returntypenameArchiveOffset<TOffset>::Proxy{offset}; } }//namespaceterse