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);
}
