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SpanByteComparer.cs
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SpanByteComparer.cs
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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
using System;
using System.Runtime.CompilerServices;
namespace Tsavorite.core
{
/// <summary>
/// Equality comparer for SpanByte
/// </summary>
public struct SpanByteComparer : ITsavoriteEqualityComparer<SpanByte>
{
/// <inheritdoc />
public unsafe long GetHashCode64(ref SpanByte spanByte) => StaticGetHashCode64(ref spanByte);
/// <summary>
/// Get 64-bit hash code
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static unsafe long StaticGetHashCode64(ref SpanByte spanByte)
{
if (spanByte.Serialized)
{
byte* ptr = (byte*)Unsafe.AsPointer(ref spanByte);
return Utility.HashBytes(ptr + sizeof(int), spanByte.Length);
}
else
{
byte* ptr = (byte*)spanByte.Pointer;
return Utility.HashBytes(ptr, spanByte.Length);
}
}
/// <inheritdoc />
public unsafe bool Equals(ref SpanByte k1, ref SpanByte k2) => StaticEquals(ref k1, ref k2);
/// <summary>
/// Equality comparison
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static unsafe bool StaticEquals(ref SpanByte k1, ref SpanByte k2)
{
return k1.AsReadOnlySpanWithMetadata().SequenceEqual(k2.AsReadOnlySpanWithMetadata())
&& (k1.MetadataSize == k2.MetadataSize);
}
}
}