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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Reflection;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Runtime.CompilerServices;
using Internal.Runtime.Augments;
namespace System
{
[StructLayoutAttribute(LayoutKind.Sequential)]
public struct RuntimeFieldHandle : ISerializable
{
private IntPtr _value;
public IntPtr Value => _value;
public override bool Equals(object obj)
{
if (!(obj is RuntimeFieldHandle))
return false;
return Equals((RuntimeFieldHandle)obj);
}
public bool Equals(RuntimeFieldHandle handle)
{
if (_value == handle._value)
return true;
if (_value == IntPtr.Zero || handle._value == IntPtr.Zero)
return false;
string fieldName1, fieldName2;
RuntimeTypeHandle declaringType1, declaringType2;
RuntimeAugments.TypeLoaderCallbacks.GetRuntimeFieldHandleComponents(this, out declaringType1, out fieldName1);
RuntimeAugments.TypeLoaderCallbacks.GetRuntimeFieldHandleComponents(handle, out declaringType2, out fieldName2);
return declaringType1.Equals(declaringType2) && fieldName1 == fieldName2;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private int _rotl(int value, int shift)
{
return (int)(((uint)value << shift) | ((uint)value >> (32 - shift)));
}
public override int GetHashCode()
{
if (_value == IntPtr.Zero)
return 0;
string fieldName;
RuntimeTypeHandle declaringType;
RuntimeAugments.TypeLoaderCallbacks.GetRuntimeFieldHandleComponents(this, out declaringType, out fieldName);
int hashcode = declaringType.GetHashCode();
return (hashcode + _rotl(hashcode, 13)) ^ fieldName.GetHashCode();
}
public static bool operator ==(RuntimeFieldHandle left, RuntimeFieldHandle right)
{
return left.Equals(right);
}
public static bool operator !=(RuntimeFieldHandle left, RuntimeFieldHandle right)
{
return !left.Equals(right);
}
public void GetObjectData(SerializationInfo info, StreamingContext context)
{
throw new PlatformNotSupportedException();
}
}
}
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