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A payload was conceptually a value with an ID. That has been formalized by removing the ID from the payload and having separate FValue and FValueId types. This separation cleans up the API in a few areas, and provides a more natural path to providing a basic key/value API. #rb Zousar.Shaker #rnx #preflight 61d704c04c252480ca284d61 #ROBOMERGE-AUTHOR: devin.doucette #ROBOMERGE-SOURCE: CL 18531844 in //UE5/Release-5.0/... via CL 18531856 #ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v899-18417669) [CL 18531864 by devin doucette in ue5-release-engine-test branch]
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "DerivedDataValue.h"
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#include "Compression/OodleDataCompression.h"
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#include "Containers/StringConv.h"
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#include "Hash/xxhash.h"
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#include "Serialization/CompactBinary.h"
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#include "Templates/UnrealTemplate.h"
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namespace UE::DerivedData
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{
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constexpr ECompressedBufferCompressor GDefaultCompressor = ECompressedBufferCompressor::Mermaid;
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constexpr ECompressedBufferCompressionLevel GDefaultCompressionLevel = ECompressedBufferCompressionLevel::VeryFast;
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FValue FValue::Compress(const FCompositeBuffer& Buffer, const uint64 BlockSize)
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{
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return FValue(FCompressedBuffer::Compress(Buffer, GDefaultCompressor, GDefaultCompressionLevel, BlockSize));
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}
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FValue FValue::Compress(const FSharedBuffer& Buffer, const uint64 BlockSize)
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{
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return FValue(FCompressedBuffer::Compress(Buffer, GDefaultCompressor, GDefaultCompressionLevel, BlockSize));
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}
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FValueId::FValueId(const FMemoryView Id)
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{
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checkf(Id.GetSize() == sizeof(ByteArray),
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TEXT("FValueId cannot be constructed from a view of %" UINT64_FMT " bytes."), Id.GetSize());
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FMemory::Memcpy(Bytes, Id.GetData(), sizeof(ByteArray));
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}
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FValueId::FValueId(const FCbObjectId& Id)
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: FValueId(ImplicitConv<const ByteArray&>(Id))
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{
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}
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FValueId::operator FCbObjectId() const
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{
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return FCbObjectId(ImplicitConv<const ByteArray&>(*this));
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}
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FValueId FValueId::FromHash(const FIoHash& Hash)
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{
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checkf(!Hash.IsZero(), TEXT("FValueId requires a non-zero hash."));
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return FValueId(MakeMemoryView(Hash.GetBytes()).Left(sizeof(ByteArray)));
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}
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FValueId FValueId::FromName(const FUtf8StringView Name)
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{
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checkf(!Name.IsEmpty(), TEXT("FValueId requires a non-empty name."));
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uint8 HashBytes[16];
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FXxHash128::HashBuffer(Name.GetData(), Name.Len()).ToByteArray(HashBytes);
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return FValueId(MakeMemoryView(HashBytes, sizeof(ByteArray)));
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}
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FValueId FValueId::FromName(const FWideStringView Name)
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{
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return FValueId::FromName(FTCHARToUTF8(Name));
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}
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} // UE::DerivedData
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