public Packet(ReadOnlySpan <byte> bf)
{
if (bf.Length < HeaderSize)
{
throw new IndexOutOfRangeException();
}
int packetSize = 0;
fixed(byte *pinnedBuffer = &MemoryMarshal.GetReference(bf))
packetSize = CalculatePacketSize(pinnedBuffer);
if (packetSize < HeaderSize)
{
throw new IndexOutOfRangeException();
}
buffPtr = (byte *)Marshal.AllocHGlobal(packetSize);
fixed(byte *pinnedBuffer = &MemoryMarshal.GetReference(bf))
Buffer.MemoryCopy(pinnedBuffer, buffPtr, packetSize, packetSize);
_pHeader = *(packetHeader *)(buffPtr);
Seek(0, SeekOrigin.Begin);
}
public Packet(packetHeader header)
{
_pHeader = header;
int packetSize = Size;
if (packetSize < HeaderSize)
{
throw new IndexOutOfRangeException();
}
buffPtr = (byte *)Marshal.AllocHGlobal(packetSize);
new Span <byte>(buffPtr, packetSize).Fill(0);
*(packetHeader *)(buffPtr) = _pHeader;
Seek(0, SeekOrigin.Begin);
}
public Packet(byte[] bf)
{
if (bf.Length < HeaderSize)
{
throw new IndexOutOfRangeException();
}
int packetLenght = 0;
fixed(byte *pinnedBuffer = bf)
packetLenght = CalculatePacketSize(pinnedBuffer);
if (packetLenght < HeaderSize)
{
throw new IndexOutOfRangeException();
}
buffPtr = (byte *)Marshal.AllocHGlobal(packetLenght);
Marshal.Copy(bf, 0, (IntPtr)buffPtr, packetLenght);
_pHeader = *(packetHeader *)(buffPtr);
Seek(0, SeekOrigin.Begin);
}
