// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.Runtime;
using System.Runtime.CompilerServices;

using Internal.Runtime;

namespace System
{
    // CONTRACT with Runtime
    // The Object type is one of the primitives understood by the compilers and runtime
    // Data Contract: Single field of type MethodTable*
    public unsafe partial class Object
    {
        // CS0649: Field '{blah}' is never assigned to, and will always have its default value
#pragma warning disable 649
        [NonSerialized]
        internal MethodTable* m_pEEType;
#pragma warning restore

        [Intrinsic]
        public Type GetType()
        {
            return Type.GetTypeFromMethodTable(m_pEEType);
        }

        [Intrinsic]
        protected internal unsafe object MemberwiseClone()
        {
            object clone = this.GetMethodTable()->IsArray ?
                RuntimeImports.RhNewVariableSizeObject(this.GetMethodTable(), Unsafe.As<Array>(this).Length) :
                RuntimeImports.RhNewObject(this.GetMethodTable());

            // copy contents of "this" to the clone

            nuint byteCount = RuntimeHelpers.GetRawObjectDataSize(this);
            ref byte src = ref this.GetRawData();
            ref byte dst = ref clone.GetRawData();

            if (this.GetMethodTable()->ContainsGCPointers)
                Buffer.BulkMoveWithWriteBarrier(ref dst, ref src, byteCount);
            else
                SpanHelpers.Memmove(ref dst, ref src, byteCount);

            return clone;
        }
    }
}