public readonly ReadOnlyMemory <byte> SerializeToFrames(ushort channelNumber, uint frameMax)
{
int maxBodyPayloadBytes = (int)(frameMax == 0 ? int.MaxValue : frameMax - Framing.BaseFrameSize);
int size = Method.GetRequiredBufferSize() +
_header.GetRequiredPayloadBufferSize() +
Framing.BodySegment.FrameSize * (maxBodyPayloadBytes == int.MaxValue ? 1 : (_body.Length + maxBodyPayloadBytes - 1) / maxBodyPayloadBytes) + _body.Length
+ Framing.Method.FrameSize + Framing.Header.FrameSize;
// Will be returned by SocketFrameWriter.WriteLoop
byte[] rentedArray = ArrayPool <byte> .Shared.Rent(size);
int offset = Framing.Method.WriteTo(rentedArray, channelNumber, Method);
int remainingBodyBytes = _body.Length;
offset += Framing.Header.WriteTo(rentedArray.AsSpan(offset), channelNumber, _header, remainingBodyBytes);
if (remainingBodyBytes > 0)
{
ReadOnlySpan <byte> bodySpan = _body.Span;
while (remainingBodyBytes > 0)
{
int frameSize = remainingBodyBytes > maxBodyPayloadBytes ? maxBodyPayloadBytes : remainingBodyBytes;
offset += Framing.BodySegment.WriteTo(rentedArray.AsSpan(offset), channelNumber, bodySpan.Slice(bodySpan.Length - remainingBodyBytes, frameSize));
remainingBodyBytes -= frameSize;
}
}
System.Diagnostics.Debug.Assert(offset == size, $"Serialized to wrong size, expect {size}, offset {offset}");
return(new ReadOnlyMemory <byte>(rentedArray, 0, size));
}
private int GetMaxSize(int maxPayloadBytes)
{
if (!Method.HasContent)
{
return(Framing.Method.FrameSize + Method.GetRequiredBufferSize());
}
return(Framing.Method.FrameSize + Method.GetRequiredBufferSize() +
Framing.Header.FrameSize + Header.GetRequiredPayloadBufferSize() +
Framing.BodySegment.FrameSize * GetBodyFrameCount(maxPayloadBytes) + Body.Length);
}
