public static IMemoryOwner <byte> TranslateToMemory(S7UserDataDatagram datagram, out int memoryLength)
{
var offset = datagram.Header.GetHeaderSize() + datagram.Parameter.GetParamSize();
var dataSize = offset + datagram.Data.GetUserDataLength();
var result = S7HeaderDatagram.TranslateToMemory(datagram.Header, dataSize, out memoryLength);
var mem = result.Memory.Slice(0, memoryLength);
S7UserDataParameter.TranslateToMemory(datagram.Parameter, mem.Slice(datagram.Header.GetHeaderSize()));
mem.Span[offset++] = datagram.Data.ReturnCode;
mem.Span[offset++] = datagram.Data.TransportSize;
BinaryPrimitives.WriteUInt16BigEndian(mem.Slice(offset, 2).Span, datagram.Data.UserDataLength);
datagram.Data.Data.CopyTo(mem.Slice(offset + 2, datagram.Data.UserDataLength));
return(result);
}
public static S7UserDataDatagram TranslateFromMemory(Memory <byte> data)
{
var span = data.Span;
var result = new S7UserDataDatagram
{
Header = S7HeaderDatagram.TranslateFromMemory(data),
Data = new S7UserData()
};
result.Parameter = S7UserDataParameter.TranslateFromMemory(data.Slice(result.Header.GetHeaderSize()));
var offset = result.Header.GetHeaderSize() + result.Parameter.GetParamSize();
result.Data.ReturnCode = span[offset++];
result.Data.TransportSize = span[offset++];
result.Data.UserDataLength = BinaryPrimitives.ReadUInt16BigEndian(span.Slice(offset, 2));
offset += 2;
result.Data.Data = new byte[result.Data.UserDataLength];
data.Slice(offset, result.Data.UserDataLength).CopyTo(result.Data.Data);
return(result);
}
