Function ReadDataAssembly

IO/XML/vtkXMLPartitionedDataSetCollectionReader.cxx:24–52

namespace
{
vtkSmartPointer<vtkDataAssembly> ReadDataAssembly(
  vtkXMLDataElement* elem, vtkXMLPartitionedDataSetCollectionReader* self)
{
  if (elem->GetAttribute("encoding") == nullptr ||
    strcmp(elem->GetAttribute("encoding"), "base64") != 0 || elem->GetCharacterData() == nullptr)
  {
    vtkWarningWithObjectMacro(self, "Unsupported DataAssembly encoding. Ignoring.");
    return nullptr;
  }

  vtkNew<vtkDataAssembly> assembly;
  const char* encoded_buffer = elem->GetCharacterData();
  size_t len_encoded_data = strlen(encoded_buffer);
  char* decoded_buffer = new char[len_encoded_data];

  // remove leading whitespace, if any.
  while (std::isspace(static_cast<int>(*encoded_buffer)))
  {
    ++encoded_buffer;
    --len_encoded_data;
  }
  auto decoded_buffer_len =
    vtkBase64Utilities::DecodeSafely(reinterpret_cast<const unsigned char*>(encoded_buffer),
      len_encoded_data, reinterpret_cast<unsigned char*>(decoded_buffer), len_encoded_data);
  decoded_buffer[decoded_buffer_len] = '\0';
  assembly->InitializeFromXML(decoded_buffer);
  delete[] decoded_buffer;
  return assembly;
}
}

vtkStandardNewMacro(vtkXMLPartitionedDataSetCollectionReader);