private void ProcessBuffer(PyBuffer buffer)
{
this.mStringBuilder.AppendFormat(
"[PyBuffer {0} bytes: {1}]", buffer.Length, HexDump.ByteArrayToHexViaLookup32(buffer.Value)
);
this.mStringBuilder.AppendLine();
}
/* This should never be used in the node, just the Cache Tool */
public bool Decode(PyObject from)
{
PyTuple data = (from as PyObjectData).Arguments as PyTuple;
// Just decode the cache info for now..
cache = data.Items[4] as PyBuffer;
return(true);
}
public void TestBufferRead()
{
string bufferTestString = "hello world! !$%&/()=?";
using var _ = Py.GIL();
using var pythonArray = ByteArrayFromAsciiString(bufferTestString);
byte[] managedArray = new byte[bufferTestString.Length];
using (PyBuffer buf = pythonArray.GetBuffer())
{
managedArray[0] = (byte)' ';
buf.Read(managedArray, 1, managedArray.Length - 1, 1);
}
string result = new UTF8Encoding().GetString(managedArray);
Assert.IsTrue(result == " " + bufferTestString.Substring(1));
}
public void TestBufferWrite()
{
string bufferTestString = "hello world! !$%&/()=?";
string bufferTestString2 = "h llo world! !$%&/()=?";
using var _ = Py.GIL();
using var pythonArray = ByteArrayFromAsciiString(bufferTestString);
using (PyBuffer buf = pythonArray.GetBuffer(PyBUF.WRITABLE))
{
byte[] managedArray = { (byte)' ' };
buf.Write(managedArray, 0, managedArray.Length, 1);
}
string result = pythonArray.InvokeMethod("decode", "utf-8".ToPython()).As <string>();
Assert.IsTrue(result == bufferTestString2);
}
public void TestBufferRead()
{
string bufferTestString = "hello world! !$%&/()=?";
using (Py.GIL())
{
using (var scope = Py.CreateScope())
{
scope.Exec($"arr = b'{bufferTestString}'");
PyObject pythonArray = scope.Get("arr");
byte[] managedArray = new byte[bufferTestString.Length];
using (PyBuffer buf = pythonArray.GetBuffer())
{
buf.Read(managedArray, 0, managedArray.Length);
}
string result = new UTF8Encoding().GetString(managedArray);
Assert.IsTrue(result == bufferTestString);
}
}
}
public void TestBufferWrite()
{
string bufferTestString = "hello world! !$%&/()=?";
using (Py.GIL())
{
using (var scope = Py.CreateScope())
{
scope.Exec($"arr = bytearray({bufferTestString.Length})");
PyObject pythonArray = scope.Get("arr");
byte[] managedArray = new UTF8Encoding().GetBytes(bufferTestString);
using (PyBuffer buf = pythonArray.GetBuffer())
{
buf.Write(managedArray, 0, managedArray.Length);
}
string result = scope.Eval("arr.decode('utf-8')").ToString();
Assert.IsTrue(result == bufferTestString);
}
}
}
/// <summary>
/// Converts the given <paramref name="data"/> to it's byte array representation.
/// Buffer are basic, binary byte arrays that do not follow any specific format
/// Their length is variable and is indicated by an extended size indicator
///
/// The following opcodes are supported
/// <seealso cref="Opcode.Buffer" /> 2 bytes minimum, the data comes right after the length indicator
/// </summary>
/// <param name="writer">Where to write the encoded data to</param>
/// <param name="buffer">The value to write</param>
private static void ProcessBuffer(BinaryWriter writer, PyBuffer buffer)
{
writer.WriteOpcode(Opcode.Buffer);
writer.WriteSizeEx(buffer.Value.Length);
writer.Write(buffer);
}
