bbradson
53 lines
1.9 KiB
C#
53 lines
1.9 KiB
C#
// Copyright (c) 2022 bradson
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at https://mozilla.org/MPL/2.0/.
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using System.Diagnostics.CodeAnalysis;
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using System.Runtime.CompilerServices;
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namespace FisheryLib.FunctionPointers;
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public static class GetHashCode<T>
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{
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public static readonly unsafe delegate*<T, int> Default
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= (delegate*<T, int>)FunctionPointers.GetHashCode.HashCodeMethods.GetFunctionPointer(typeof(T));
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}
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[SuppressMessage("Naming", "CA1720")]
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public static class GetHashCode
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{
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[UsedImplicitly(ImplicitUseTargetFlags.Members)]
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public static class Methods
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{
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public static int Byte(byte obj) => obj;
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public static int Int(int obj) => obj;
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public static int Uint(uint obj) => (int)obj;
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public static int Ushort(ushort obj) => obj;
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public static unsafe int VoidPtr(void* obj) => (int)obj;
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public static int Enum<T>(T obj) where T : struct => JitHelpers.UnsafeEnumCast(obj).GetHashCode();
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public static int SbyteEnum<T>(T obj) where T : struct => ((sbyte)JitHelpers.UnsafeEnumCast(obj)).GetHashCode();
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public static int ShortEnum<T>(T obj) where T : struct => ((short)JitHelpers.UnsafeEnumCast(obj)).GetHashCode();
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public static int LongEnum<T>(T obj) where T : struct => JitHelpers.UnsafeEnumCastLong(obj).GetHashCode();
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public static int ValueType<T>(T obj) where T : struct => obj.GetHashCode();
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public static unsafe int Nullable<T>(T? obj) where T : struct
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=> !obj.HasValue ? 0 : GetHashCode<T>.Default(obj.GetValueOrDefault());
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public static int Reference<T>(T obj) where T : class => RuntimeHelpers.GetHashCode(obj);
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public static int Object<T>(T? obj) where T : class => obj?.GetHashCode() ?? 0;
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}
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public static readonly MethodFactory.HashCode HashCodeMethods
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= new(typeof(Methods), "FisheryHashCodeMethod_", false);
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} |