EventPtrTableReader.cs

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using System.Reflection.Internal;
 
namespace System.Reflection.Metadata.Ecma335;
 
internal readonly struct EventPtrTableReader
{
    internal readonly int NumberOfRows;
 
    private readonly bool _IsEventTableRowRefSizeSmall;
 
    private readonly int _EventOffset;
 
    internal readonly int RowSize;
 
    internal readonly MemoryBlock Block;
 
    internal EventPtrTableReader(int numberOfRows, int eventTableRowRefSize, MemoryBlock containingBlock, int containingBlockOffset)
    {
        NumberOfRows = numberOfRows;
        _IsEventTableRowRefSizeSmall = eventTableRowRefSize == 2;
        _EventOffset = 0;
        RowSize = _EventOffset + eventTableRowRefSize;
        Block = containingBlock.GetMemoryBlockAt(containingBlockOffset, RowSize * numberOfRows);
    }
 
    internal EventDefinitionHandle GetEventFor(int rowId)
    {
        int num = (rowId - 1) * RowSize;
        return EventDefinitionHandle.FromRowId(Block.PeekReference(num + _EventOffset, _IsEventTableRowRefSizeSmall));
    }
}