private object GetSelectedRange()
{
IPythonArray arr = _object as IPythonArray;
if (arr != null)
{
return(arr.tostring());
}
ByteArray bytearr = _object as ByteArray;
if (bytearr != null)
{
return(new Bytes((IList <byte>)bytearr[GetSlice()]));
}
IPythonBufferable pyBuf = _object as IPythonBufferable;
if (pyBuf != null)
{
return(new Bytes(pyBuf.GetBytes(_offset, _size)));
}
return(PythonOps.GetIndex(_context, _object, GetSlice()));
}
private bool InitBufferObject(object o, int offset, int size)
{
if (offset < 0)
{
throw PythonOps.ValueError("offset must be zero or positive");
}
else if (size < -1)
{
// -1 is the way to ask for the default size so we allow -1 as a size
throw PythonOps.ValueError("size must be zero or positive");
}
// we currently support only buffers, strings and arrays
// of primitives, strings, bytes, and bytearray objects.
int length;
if (o is PythonBuffer)
{
PythonBuffer py = (PythonBuffer)o;
o = py._object; // grab the internal object
length = py._size;
}
else if (o is string)
{
string strobj = (string)o;
length = strobj.Length;
}
else if (o is Bytes)
{
length = ((Bytes)o).Count;
}
else if (o is ByteArray)
{
length = ((ByteArray)o).Count;
}
else if (o is Array || o is IPythonArray)
{
Array arr = o as Array;
if (arr != null)
{
Type t = arr.GetType().GetElementType();
if (!t.IsPrimitive && t != typeof(string))
{
return(false);
}
length = arr.Length;
}
else
{
IPythonArray pa = (IPythonArray)o;
length = pa.Count;
}
}
else if (o is IPythonBufferable)
{
length = ((IPythonBufferable)o).Size;
_object = o;
}
else
{
return(false);
}
// reset the size based on the given buffer's original size
if (size >= (length - offset) || size == -1)
{
_size = length - offset;
}
else
{
_size = size;
}
_object = o;
_offset = offset;
return(true);
}
