MemoryArchive.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Misc/AssertionMacros.h"
#include "Serialization/Archive.h"
#include "Containers/UnrealString.h"
#include "UObject/NameTypes.h"
 
/**
 * Base class for serializing arbitrary data in memory.
 */
class FMemoryArchive : public FArchive
{
public:
    /**
     * Returns the name of the Archive.  Useful for getting the name of the package a struct or object
     * is in when a loading error occurs.
     *
     * This is overridden for the specific Archive Types
     **/
    virtual FString GetArchiveName() const { return TEXT("FMemoryArchive"); }
 
    void Seek( int64 InPos ) final
    {
        Offset = InPos;
    }
    int64 Tell() final
    {
        return Offset;
    }
 
    using FArchive::operator<<; // For visibility of the overloads we don't override
 
    virtual FArchive& operator<<( class FName& N ) override
    {
        // Serialize the FName as a string
        if (IsLoading())
        {
            FString StringName;
            *this << StringName;
            N = FName(*StringName);
        }
        else
        {
            FString StringName = N.ToString();
            *this << StringName;
        }
        return *this;
    }
 
    virtual FArchive& operator<<(struct UObject*& Res ) override
    {
        // Not supported through this archive
        check(0);
        return *this;
    }
 
protected:
 
    /** Marked as protected to avoid instantiating this class directly */
    FMemoryArchive()
        : FArchive(), Offset(0)
    {
    }
 
    int64               Offset;
};