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

namespace Microsoft.Diagnostics.DataContractReader.Data;

[CdacType(nameof(DataType.EEClass))]
internal sealed partial class EEClass : IData<EEClass>
{
    [Field] public partial TargetPointer MethodTable { get; }
    [Field] public partial TargetPointer MethodDescChunk { get; }
    [Field] public partial ushort NumMethods { get; }
    [Field] public partial uint CorTypeAttr { get; }

    // An InternalCorElementType uses the enum values of a CorElementType to
    // indicate some of the information about the type of the type which uses
    // the EEClass
    //
    // In particular. All reference types are ELEMENT_TYPE_CLASS
    // Enums are the element type of their underlying type
    // ValueTypes which can exactly be represented as an element type are represented as such
    [Field] public partial byte InternalCorElementType { get; }
    [Field] public partial ushort NumInstanceFields { get; }
    [Field] public partial ushort NumStaticFields { get; }
    [Field] public partial ushort NumThreadStaticFields { get; }
    [Field] public partial TargetPointer FieldDescList { get; }
    [Field] public partial ushort NumNonVirtualSlots { get; }
    [Field] public partial byte BaseSizePadding { get; }
    [Field] public partial TargetPointer OptionalFields { get; }

    private const uint HasLayoutFlag = 0x00000040;

    [Field] public partial uint? VMFlags { get; }

    public bool HasLayout => VMFlags.HasValue && (VMFlags.Value & HasLayoutFlag) != 0;
}