ReadBufferState.cs

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using System.Buffers;
 
namespace System.Text.Json.Serialization;
 
internal struct ReadBufferState : IDisposable
{
    public byte[] Buffer;
 
    public int BytesInBuffer;
 
    public int ClearMax;
 
    public bool IsFirstIteration;
 
    public bool IsFinalBlock;
 
    public ReadBufferState(int defaultBufferSize)
    {
        Buffer = ArrayPool<byte>.Shared.Rent(Math.Max(defaultBufferSize, JsonConstants.Utf8Bom.Length));
        BytesInBuffer = (ClearMax = 0);
        IsFirstIteration = true;
        IsFinalBlock = false;
    }
 
    public void Dispose()
    {
        new Span<byte>(Buffer, 0, ClearMax).Clear();
        byte[] buffer = Buffer;
        Buffer = null;
        ArrayPool<byte>.Shared.Return(buffer);
    }
}