HasDeclSecurityTag.cs

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using System.Runtime.CompilerServices;
 
namespace System.Reflection.Metadata.Ecma335;
 
internal static class HasDeclSecurityTag
{
    internal const int NumberOfBits = 2;
 
    internal const int LargeRowSize = 16384;
 
    internal const uint TypeDef = 0u;
 
    internal const uint MethodDef = 1u;
 
    internal const uint Assembly = 2u;
 
    internal const uint TagMask = 3u;
 
    internal const TableMask TablesReferenced = TableMask.TypeDef | TableMask.MethodDef | TableMask.Assembly;
 
    internal const uint TagToTokenTypeByteVector = 2098690u;
 
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    internal static EntityHandle ConvertToHandle(uint hasDeclSecurity)
    {
        uint num = (uint)(2098690 >>> (int)((hasDeclSecurity & 3) << 3) << 24);
        uint num2 = hasDeclSecurity >> 2;
        if (num == 0 || (num2 & 0xFF000000u) != 0)
        {
            Throw.InvalidCodedIndex();
        }
        return new EntityHandle(num | num2);
    }
 
    internal static uint ConvertToTag(EntityHandle handle)
    {
        uint type = handle.Type;
        uint rowId = (uint)handle.RowId;
        return (type >> 24) switch
        {
            2u => (rowId << 2) | 0u, 
            6u => (rowId << 2) | 1u, 
            32u => (rowId << 2) | 2u, 
            _ => 0u, 
        };
    }
}