PushModelUtils.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Net/Core/PushModel/PushModelMacros.h"
 
#if WITH_PUSH_MODEL
 
#include "CoreMinimal.h"
#include "Containers/BitArray.h"
 
namespace UEPushModelPrivate
{
    static const int32 GetNumWordsInBitArray(const TBitArray<>& BitArray)
    {
        return (BitArray.Num() + 31) >> 5;
    }
    
    static void ResetBitArray(TBitArray<>& ToReset)
    {
        FMemory::Memzero(ToReset.GetData(), GetNumWordsInBitArray(ToReset) * 4);
    }
    
    static void SetBitArray(TBitArray<>& ToSet)
    {
        FMemory::Memset(ToSet.GetData(), 0xFF, GetNumWordsInBitArray(ToSet) * 4);
    }
    
    static void BitwiseOrBitArrays(const TBitArray<>& MaskBitArray, TBitArray<>& ResultBitArray)
    {
        check(MaskBitArray.Num() == ResultBitArray.Num());
 
        const uint32* InWords = MaskBitArray.GetData();
        uint32* OutWords = ResultBitArray.GetData();
        const int32 NumWords = GetNumWordsInBitArray(MaskBitArray);
 
        for (int32 i = 0; i < NumWords; ++i)
        {
            OutWords[i] |= InWords[i];
        }
    }
 
    static bool AreAnyBitsSet(const TBitArray<>& BitArray)
    {
        const int32 NumWords = GetNumWordsInBitArray(BitArray);
        const uint32* const Words = BitArray.GetData();
 
        for (int32 i = 0; i < NumWords; ++i)
        {
            if (Words[i] != 0)
            {
                return true;
            }
        }
 
        return false;
    }
}
 
#endif