// 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.CompilerServices;
namespace System.Reflection.Metadata.Ecma335
{
internal static class TypeDefOrRefTag
{
internal const int NumberOfBits = 2;
internal const int LargeRowSize = 0x00000001 << (16 - NumberOfBits);
internal const uint TypeDef = 0x00000000;
internal const uint TypeRef = 0x00000001;
internal const uint TypeSpec = 0x00000002;
internal const uint TagMask = 0x00000003;
internal const uint TagToTokenTypeByteVector = TokenTypeIds.TypeDef >> 24 | TokenTypeIds.TypeRef >> 16 | TokenTypeIds.TypeSpec >> 8;
internal const TableMask TablesReferenced =
TableMask.TypeDef
| TableMask.TypeRef
| TableMask.TypeSpec;
// inlining improves perf of the tight loop in FindSystemObjectTypeDef by 25%
[MethodImpl(MethodImplOptions.AggressiveInlining)]
internal static EntityHandle ConvertToHandle(uint typeDefOrRefTag)
{
uint tokenType = (TagToTokenTypeByteVector >> ((int)(typeDefOrRefTag & TagMask) << 3)) << TokenTypeIds.RowIdBitCount;
uint rowId = (typeDefOrRefTag >> NumberOfBits);
if (tokenType == 0 || (rowId & ~TokenTypeIds.RIDMask) != 0)
{
Throw.InvalidCodedIndex();
}
return new EntityHandle(tokenType | rowId);
}
}
}
|