mirror of https://github.com/RPCS3/rpcs3.git
52 lines
984 B
C++
52 lines
984 B
C++
#pragma once
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#include "Utilities/types.h"
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namespace rpcs3
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{
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template<typename T>
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static size_t hash_base(T value)
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{
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return static_cast<size_t>(value);
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}
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template<typename T, typename U>
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static size_t hash_struct_base(const T& value)
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{
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// FNV 64-bit
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size_t result = 14695981039346656037ull;
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const U *bits = reinterpret_cast<const U*>(&value);
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for (size_t n = 0; n < (sizeof(T) / sizeof(U)); ++n)
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{
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result ^= bits[n];
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result *= 1099511628211ull;
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}
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return result;
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}
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template<typename T>
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static size_t hash_struct(const T& value)
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{
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static constexpr auto block_sz = sizeof(T);
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if constexpr ((block_sz & 0x7) == 0)
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{
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return hash_struct_base<T, u64>(value);
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}
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if constexpr ((block_sz & 0x3) == 0)
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{
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return hash_struct_base<T, u32>(value);
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}
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if constexpr ((block_sz & 0x1) == 0)
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{
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return hash_struct_base<T, u16>(value);
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}
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return hash_struct_base<T, u8>(value);
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}
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}
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