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#rb Zousar.Shaker #rnx #preflight 61d93c241a3fd09dcbefcfb8 #ROBOMERGE-AUTHOR: devin.doucette #ROBOMERGE-SOURCE: CL 18560428 in //UE5/Release-5.0/... via CL 18560448 #ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v899-18417669) [CL 18560457 by devin doucette in ue5-release-engine-test branch]
110 lines
2.6 KiB
C++
110 lines
2.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "CoreTypes.h"
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#include "Containers/StringFwd.h"
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#include "Memory/MemoryView.h"
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#include "String/BytesToHex.h"
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#define UE_API DERIVEDDATACACHE_API
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class FCbObjectId;
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struct FIoHash;
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namespace UE::DerivedData
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{
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/** A 12-byte value that uniquely identifies a value in the context that it was created. */
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struct FValueId
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{
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public:
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using ByteArray = uint8[12];
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/** Construct a null ID. */
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FValueId() = default;
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/** Construct an ID from an array of 12 bytes. */
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inline explicit FValueId(const ByteArray& Id);
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/** Construct an ID from a view of 12 bytes. */
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UE_API explicit FValueId(FMemoryView Id);
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/** Construct an ID from a Compact Binary Object ID. */
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UE_API FValueId(const FCbObjectId& Id);
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/** Returns the ID as a Compact Binary Object ID. */
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UE_API operator FCbObjectId() const;
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/** Construct an ID from a non-zero hash. */
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[[nodiscard]] UE_API static FValueId FromHash(const FIoHash& Hash);
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/** Construct an ID from a non-empty name. */
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[[nodiscard]] UE_API static FValueId FromName(FUtf8StringView Name);
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[[nodiscard]] UE_API static FValueId FromName(FWideStringView Name);
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/** Returns a reference to the raw byte array for the ID. */
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inline const ByteArray& GetBytes() const { return Bytes; }
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/** Returns a view of the raw byte array for the ID. */
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inline FMemoryView GetView() const { return MakeMemoryView(Bytes); }
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/** Whether this is null. */
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inline bool IsNull() const;
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/** Whether this is not null. */
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inline bool IsValid() const { return !IsNull(); }
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/** Reset this to null. */
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inline void Reset() { *this = FValueId(); }
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/** A null ID. */
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static const FValueId Null;
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private:
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alignas(uint32) ByteArray Bytes{};
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};
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inline const FValueId FValueId::Null;
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inline FValueId::FValueId(const ByteArray& Id)
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{
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FMemory::Memcpy(Bytes, Id, sizeof(ByteArray));
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}
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inline bool operator==(const FValueId& A, const FValueId& B)
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{
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return A.GetView().EqualBytes(B.GetView());
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}
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inline bool operator!=(const FValueId& A, const FValueId& B)
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{
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return !A.GetView().EqualBytes(B.GetView());
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}
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inline bool operator<(const FValueId& A, const FValueId& B)
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{
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return A.GetView().CompareBytes(B.GetView()) < 0;
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}
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inline uint32 GetTypeHash(const FValueId& Id)
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{
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return *reinterpret_cast<const uint32*>(Id.GetView().GetData());
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}
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/** Convert the ID to a 24-character hex string. */
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template <typename CharType>
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inline TStringBuilderBase<CharType>& operator<<(TStringBuilderBase<CharType>& Builder, const FValueId& Id)
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{
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UE::String::BytesToHexLower(Id.GetBytes(), Builder);
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return Builder;
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}
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inline bool FValueId::IsNull() const
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{
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return *this == FValueId();
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}
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} // UE::DerivedData
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#undef UE_API
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