private protected override unsafe TransformerEstimatorSafeHandle CreateTransformerFromSavedDataHelper(byte *rawData, IntPtr dataSize)
{
var result = CreateTransformerFromSavedDataNative(rawData, dataSize, out IntPtr transformer, out IntPtr errorHandle);
if (!result)
{
throw new Exception(GetErrorDetailsAndFreeNativeMemory(errorHandle));
}
var handle = new TransformerEstimatorSafeHandle(transformer, DestroyTransformerNative);
// Get the result of the transform and cache it. Pass in null so we get the Mode back.
result = TransformDataNative(handle, null, out IntPtr output, out IntPtr outputSize, out errorHandle);
if (!result)
{
throw new Exception(GetErrorDetailsAndFreeNativeMemory(errorHandle));
}
using (var handler = new TransformedDataSafeHandle(output, outputSize, DestroyTransformedDataNative))
{
#if NETSTANDARD2_0
byte[] buffer = new byte[outputSize.ToInt32()];
Marshal.Copy(output, buffer, 0, buffer.Length);
Result = new ReadOnlyMemory <char>(Encoding.UTF8.GetString(buffer).ToArray());
#else
var buffer = new ReadOnlySpan <byte>(output.ToPointer(), outputSize.ToInt32());
Result = new ReadOnlyMemory <char>(Encoding.UTF8.GetString(buffer).ToArray());
#endif
}
return(handle);
}
internal override unsafe void CreateTransformerFromEstimator(IDataView input)
{
TransformerHandler = CreateTransformerFromEstimatorBase(input);
// Get the result of the transform and cache it. Pass in null so we get the Mode back.
var result = TransformDataNative(TransformerHandler, null, out IntPtr output, out IntPtr outputSize, out IntPtr errorHandle);
if (!result)
{
throw new Exception(GetErrorDetailsAndFreeNativeMemory(errorHandle));
}
using (var handler = new TransformedDataSafeHandle(output, outputSize, DestroyTransformedDataNative))
{
#if NETSTANDARD2_0
byte[] buffer = new byte[outputSize.ToInt32()];
Marshal.Copy(output, buffer, 0, buffer.Length);
Result = new ReadOnlyMemory <char>(Encoding.UTF8.GetString(buffer).ToArray());
#else
var buffer = new ReadOnlySpan <byte>(output.ToPointer(), outputSize.ToInt32());
Result = new ReadOnlyMemory <char>(Encoding.UTF8.GetString(buffer).ToArray());
#endif
}
}
