wip

2025-02-10 12:50:45 +00:00
parent 18ceb512f6
commit f6e55b7a21
8 changed files with 150 additions and 69 deletions
@@ -0,0 +1,66 @@
+using System.Buffers;
+using System.IO.Pipelines;
+
+namespace Toolkit.Foundation;
+
+public class SerialStructReader(Stream stream) :
+    SerialReader<SerialStructEventArgs>(stream)
+{
+    private readonly PipeReader reader = PipeReader.Create(stream);
+
+    public override async IAsyncEnumerable<SerialStructEventArgs> ReadAsync()
+    {
+        while (true)
+        {
+            ReadResult? result = default;
+
+            try
+            {
+                result = await reader.ReadAsync();
+            }
+            catch (IOException)
+            {
+                continue;
+            }
+            catch (OperationCanceledException)
+            {
+                yield break;
+            }
+            catch (Exception)
+            {
+                yield break;
+            }
+
+            if (result.HasValue)
+            {
+                ReadOnlySequence<byte> buffer = result.Value.Buffer;
+                while (TryParse(ref buffer, out SerialStructEventArgs serialEvent))
+                {
+                    yield return serialEvent;
+                }
+
+                reader.AdvanceTo(buffer.Start, buffer.End);
+            }
+
+        }
+    }
+
+    private bool TryParse(ref ReadOnlySequence<byte> buffer, out SerialStructEventArgs serialEvent)
+    {
+        SequenceReader<byte> reader = new(buffer);
+        serialEvent = default!;
+
+        if (reader.Remaining < 3)
+            return false;
+
+        if (!reader.TryRead(out byte type))
+            return false;
+
+        if (!reader.TryReadLittleEndian(out short value))
+            return false;
+
+        serialEvent = new SerialStructEventArgs(type, value);
+        buffer = buffer.Slice(reader.Position);
+        return true;
+    }
+}