90 lines
1.5 KiB
C++
90 lines
1.5 KiB
C++
// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
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#pragma once
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#include "Engine/Core/Templates.h"
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inline uint32 GetHash(const uint8 key)
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{
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return key;
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}
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inline uint32 GetHash(const int8 key)
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{
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return key;
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}
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inline uint32 GetHash(const uint16 key)
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{
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return key;
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}
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inline uint32 GetHash(const int16 key)
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{
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return key;
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}
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inline uint32 GetHash(const int32 key)
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{
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return key;
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}
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inline uint32 GetHash(const uint32 key)
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{
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return key;
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}
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inline uint32 GetHash(const uint64 key)
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{
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return (uint32)key + ((uint32)(key >> 32) * 23);
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}
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inline uint32 GetHash(const int64 key)
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{
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return (uint32)key + ((uint32)(key >> 32) * 23);
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}
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inline uint32 GetHash(const char key)
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{
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return key;
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}
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inline uint32 GetHash(const Char key)
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{
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return key;
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}
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inline uint32 GetHash(const float key)
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{
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return *(uint32*)&key;
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}
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inline uint32 GetHash(const double key)
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{
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return GetHash(*(uint64*)&key);
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}
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inline uint32 GetHash(const void* key)
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{
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static const int64 shift = 3;
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return (uint32)((int64)(key) >> shift);
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}
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template<typename EnumType>
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inline typename TEnableIf<TIsEnum<EnumType>::Value, uint32>::Type GetHash(const EnumType key)
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{
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return GetHash((__underlying_type(EnumType))key);
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}
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inline void CombineHash(uint32& hash, const uint32 value)
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{
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// Reference: Boost lib
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hash ^= value + 0x9e3779b9 + (hash << 6) + (hash >> 2);
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}
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template<typename T>
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inline void CombineHash(uint32& hash, const T* value)
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{
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CombineHash(hash, GetHash(value));
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}
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