public static bool WriteBlockAndPreamble(TrackingPipeWriter writer, NettraceBlock block) { if (block.Type.Name != KnownTypeNames.EventBlockCompressed && block.Type.Name != KnownTypeNames.StackBlockCompressed) { return(false); } var padding = BlockHelpers.GetPadding(writer, block); var prefixLength = padding + sizeof(int); using var decoder = new BrotliDecoder(); var source = ArrayPool <byte> .Shared.Rent((int)block.BlockBody.Length); block.BlockBody.CopyTo(source); var written = 0; Memory <byte> memory; try { var length = prefixLength + (int)block.BlockBody.Length; memory = writer.GetMemory(length); while (!BrotliDecoder.TryDecompress(source.AsSpan(0, (int)block.BlockBody.Length), memory.Slice(prefixLength).Span, out written)) { length = memory.Length * 2; memory = writer.GetMemory(length); } } finally { ArrayPool <byte> .Shared.Return(source); } // Write size BitConverter.TryWriteBytes(memory.Span, written); // clear padding bits memory.Slice(sizeof(int), padding).Span.Clear(); writer.Advance(written + prefixLength); return(true); }
public static bool WriteBlockAndPreamble(TrackingPipeWriter writer, NettraceBlock block) { if (block.Type.Name != KnownTypeNames.EventBlock && block.Type.Name != KnownTypeNames.StackBlock) { return(false); } var blockSequence = block.BlockBody; var maxLength = BrotliEncoder.GetMaxCompressedLength((int)blockSequence.Length); var padding = BlockHelpers.GetPadding(writer !, block); var prefixLength = padding + sizeof(int); var memory = writer !.GetMemory(maxLength + prefixLength); // clear padding bits memory.Slice(0, prefixLength).Span.Clear(); using var encoder = new BrotliEncoder(quality: 9, window: 10); var slicedMemory = memory.Slice(prefixLength); var totalWritten = 0; OperationStatus status; foreach (var sequence in blockSequence) { status = encoder.Compress(sequence.Span, slicedMemory.Span, out var consumed, out var written, false); Debug.Assert(consumed == sequence.Span.Length); Debug.Assert(status == OperationStatus.Done); slicedMemory = slicedMemory.Slice(written); totalWritten += written; } status = encoder.Compress(ReadOnlySpan <byte> .Empty, slicedMemory.Span, out var _, out var written2, true); Debug.Assert(status == OperationStatus.Done); totalWritten += written2; // Write size BitConverter.TryWriteBytes(memory.Span, totalWritten); writer.Advance(totalWritten + prefixLength); return(true); }