Refactor serials

2025-02-10 10:10:16 +00:00
parent 0afe621f59
commit 18ceb512f6
27 changed files with 168 additions and 283 deletions
@@ -0,0 +1,61 @@
+using System.Buffers;
+using System.IO.Pipelines;
+
+namespace Toolkit.Foundation;
+
+public class SerialEventReader(Stream stream) : 
+    SerialReader<SerialEventArgs>(stream)
+{
+    private readonly PipeReader reader = PipeReader.Create(stream);
+
+    public override async IAsyncEnumerable<SerialEventArgs> ReadAsync()
+    {
+        while (true)
+        {
+            ReadResult result;
+            try
+            {
+                result = await reader.ReadAsync();
+            }
+            catch (Exception)
+            {
+                continue;
+            }
+
+            ReadOnlySequence<byte> buffer = result.Buffer;
+
+            while (TryParseEvent(ref buffer, out SerialEventArgs serialEvent))
+            {
+                yield return serialEvent;
+            }
+
+            reader.AdvanceTo(buffer.Start, buffer.End);
+
+            if (result.IsCompleted)
+                break;
+        }
+
+        await reader.CompleteAsync();
+    }
+
+    private bool TryParseEvent(ref ReadOnlySequence<byte> buffer, 
+        out SerialEventArgs 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 SerialEventArgs(type, value);
+
+        buffer = buffer.Slice(reader.Position);
+        return true;
+    }
+}