private MemoryView(MemoryView mv, int newStart, int newStop, int newStep, int newLen) : this(mv) {
Debug.Assert(_numDims > 0);
Debug.Assert(newLen <= _shape[0]);
var oldLen = _shape[0];
var newShape = _shape.ToArray();
newShape[0] = newLen;
_shape = newShape;
_offset += newStart * _strides[0];
if (newLen > 1)
{
var newStrides = _strides.ToArray();
newStrides[0] *= newStep;
_strides = newStrides;
}
if (oldLen != 0)
{
_numItems /= oldLen;
}
_numItems *= newLen;
_isCContig = _isCContig && newStep == 1;
_isFContig = _isCContig && _numDims <= 1; // TODO: support for ND Fortran arrays not implemented
}
public ByteArray InPlaceAdd(MemoryView other)
{
lock (this) {
_bytes.AddRange(other.tobytes());
return(this);
}
}
public bool __eq__(CodeContext /*!*/ context, [NotNull] MemoryView value)
{
if (_buffer == null)
{
return(value._buffer == null);
}
// TODO: comparing flat bytes is oversimplification; besides, no data copyimg
return(tobytes().Equals(value.tobytes()));
}
public override bool Equals(object obj)
{
MemoryView mv = obj as MemoryView;
if ((object)mv != null)
{
return(this == mv);
}
return(false);
}
private MemoryView(MemoryView @object, BufferFlags flags) : this(@object) {
// flags already checked for consistency with the underlying buffer
_flags = flags;
if (!_flags.HasFlag(BufferFlags.ND))
{
// flatten
_numDims = 1;
_shape = new[] { _numItems };
_isCContig = _isFContig = true;
}
}
public MemoryView([NotNone] MemoryView @object)
{
_exporter = @object._exporter;
_flags = BufferFlags.RecordsRO;
_buffer = _exporter.GetBuffer(_flags);
_offset = @object._offset;
_isReadOnly = @object._isReadOnly;
_numDims = @object._numDims;
_format = @object._format;
_itemSize = @object._itemSize;
_shape = @object._shape;
_strides = @object._strides;
_isCContig = @object._isCContig;
_isFContig = @object._isFContig;
_numItems = @object._numItems;
}
private MemoryView(MemoryView mv, string newFormat, int newItemSize, IReadOnlyList <int> newShape) : this(mv) {
// arguments already checked for consistency
// reformat
_format = newFormat;
_numItems *= _itemSize;
_numItems /= newItemSize;
_itemSize = newItemSize;
// reshape
_shape = newShape;
_numDims = _shape.Count;
_strides = GetContiguousStrides(_shape, _itemSize);
}
internal MemoryView(MemoryView mv, bool readOnly) : this(mv) {
_isReadOnly = _isReadOnly || readOnly;
}
public MemoryView(MemoryView @object) :
this(@object._buffer, @object._start, @object._end, @object._step, @object._format, @object._shape)
{
}
public MemoryView(MemoryView obj) : this(obj._buffer, obj._start, obj._end)
{
}
public bool __ne__(CodeContext /*!*/ context, [NotNull] MemoryView value) => !__eq__(context, value);
public MemoryView(MemoryView obj)
{
_buffer = obj._buffer;
_start = obj._start;
_end = obj._end;
}
public PythonTuple recvfrom_into(MemoryView buffer, [DefaultParameterValue(0)]int nbytes, [DefaultParameterValue(0)]int flags){
int bytesRead;
byte[] byteBuffer = buffer.tobytes().ToByteArray();
IPEndPoint remoteIPEP = new IPEndPoint(IPAddress.Any, 0);
EndPoint remoteEP = remoteIPEP;
try {
bytesRead = _socket.ReceiveFrom(byteBuffer, (SocketFlags)flags, ref remoteEP);
}
catch (Exception e) {
throw MakeRecvException(e, SocketError.InvalidArgument);
}
buffer[new Slice(0, bytesRead)] = byteBuffer.Slice(new Slice(0, bytesRead));
PythonTuple remoteAddress = EndPointToTuple((IPEndPoint)remoteEP);
return PythonTuple.MakeTuple(bytesRead, remoteAddress);
}
public int recv_into(MemoryView buffer, [DefaultParameterValue(0)]int nbytes, [DefaultParameterValue(0)]int flags) {
int bytesRead;
byte[] byteBuffer = buffer.tobytes().ToByteArray();
try {
bytesRead = _socket.Receive(byteBuffer, (SocketFlags)flags);
}
catch (Exception e) {
if (_socket.SendTimeout == 0) {
var s = new SocketException((int)SocketError.NotConnected);
throw PythonExceptions.CreateThrowable(error(_context), (int)SocketError.NotConnected, s.Message);
}
else
throw MakeException(_context, e);
}
buffer[new Slice(0, bytesRead)] = byteBuffer.Slice(new Slice(0, bytesRead));
return bytesRead;
}
public static Bytes hexlify(MemoryView data)
{
return hexlify(data.tobytes());
}
public MemoryView([NotNull] MemoryView @object) :
this(@object._buffer, @object._start, @object._end, @object._step, @object._format, @object._shape, @object._isReadOnly)
{
}
public bool __eq__(CodeContext /*!*/ context, [NotNull] MemoryView value) => tobytes().Equals(value.tobytes());
public MemoryView(MemoryView obj) : this(obj._buffer, obj._start, obj._end, obj._step, obj._format, obj._shape)
{
}
