public void ContinuousMemoryBlockWriterBasicsWorks() { var byteArrayWriter = new ContinuousMemoryBlockWriter(); Assert.Equal(0, byteArrayWriter.GetCurrentPositionWithoutWriter()); Assert.Equal(Array.Empty <byte>(), byteArrayWriter.GetSpan().ToArray()); Assert.Equal(Array.Empty <byte>(), byteArrayWriter.GetByteBuffer().ToByteArray()); var writer = new SpanWriter(byteArrayWriter); writer.WriteInt8(42); writer.Sync(); Assert.Equal(1, byteArrayWriter.GetCurrentPositionWithoutWriter()); Assert.Equal(new byte[] { 42 }, byteArrayWriter.GetSpan().ToArray()); Assert.Equal(new byte[] { 42 }, byteArrayWriter.GetByteBuffer().ToByteArray()); writer.WriteInt8(1); Assert.Equal(2, writer.GetCurrentPosition()); writer.SetCurrentPosition(1); writer.WriteBlock(new byte[] { 43, 44 }); writer.Sync(); Assert.Equal(3, byteArrayWriter.GetCurrentPositionWithoutWriter()); Assert.Equal(new byte[] { 42, 43, 44 }, byteArrayWriter.GetSpan().ToArray()); Assert.Equal(new byte[] { 42, 43, 44 }, byteArrayWriter.GetByteBuffer().ToByteArray()); }
void SerializeIntoBuffer(object?metadata, IReadOnlyList <object>?events, out int startOffset, out IDescriptorSerializerContext serializerContext, out BlockType blockType, out int lenWithoutEndPadding, out ByteBuffer block) { startOffset = (int)EndBufferLen + HeaderSize; var writer = new SpanWriter(); writer.WriteBlock(_zeroes.AsSpan(0, startOffset)); serializerContext = Mapping; if (metadata != null) { serializerContext = serializerContext.StoreNewDescriptors(metadata); } if (events != null) { foreach (var o in events) { serializerContext = serializerContext.StoreNewDescriptors(o); } if (events.Count == 0) { events = null; } } serializerContext.FinishNewDescriptors(ref writer); blockType = BlockType.FirstBlock; if (serializerContext.SomeTypeStored) { blockType |= BlockType.HasTypeDeclaration; } if (metadata != null) { serializerContext.StoreObject(ref writer, metadata); blockType |= BlockType.HasMetadata; } if (events != null) { if (events.Count == 1) { serializerContext.StoreObject(ref writer, events[0]); blockType |= BlockType.HasOneEvent; } else { writer.WriteVUInt32((uint)events.Count); foreach (var o in events) { serializerContext.StoreObject(ref writer, o); } blockType |= BlockType.HasMoreEvents; } } lenWithoutEndPadding = (int)writer.GetCurrentPosition(); writer.WriteBlock(_zeroes.AsSpan(0, (int)(SectorSize - 1))); block = writer.GetByteBufferAndReset(); if (CompressionStrategy.ShouldTryToCompress(lenWithoutEndPadding - startOffset)) { var compressedBlock = new ReadOnlySpan <byte>(block.Buffer, startOffset, lenWithoutEndPadding - startOffset); if (CompressionStrategy.Compress(ref compressedBlock)) { blockType |= BlockType.Compressed; compressedBlock.CopyTo(new Span <byte>(block.Buffer, startOffset, compressedBlock.Length)); lenWithoutEndPadding = startOffset + compressedBlock.Length; new Span <byte>(block.Buffer, lenWithoutEndPadding, (int)SectorSize - 1).Clear(); } } }