Method ReadData

IO/Infovis/vtkDelimitedTextReader.cxx:300–401

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
int vtkDelimitedTextReader::ReadData(vtkTable* output_table)
{
  this->LastError = "";

  if (!this->PedigreeIdArrayName)
  {
    vtkErrorMacro("You must specify a pedigree id array name");
    return 1;
  }

  if (!this->ReadFromInputString && !this->FileName)
  {
    vtkWarningMacro("Cannot read from file without a file name set. Nothing read.");
    return 1;
  }

  std::unique_ptr<std::istream> input_stream = this->OpenStream();
  if (!input_stream)
  {
    vtkWarningMacro("Unable to open file, ReadData aborted.");
    return 1;
  }

  this->ReadBOM(input_stream.get());

  auto transCodec = vtkSmartPointer<vtkTextCodec>::Take(this->CreateTextCodec(input_stream.get()));

  char tstring[2];
  tstring[1] = '\0';
  tstring[0] = this->StringDelimiter;
  // don't use Set* methods since they change the MTime in
  // RequestData() !!!!!
  std::string fieldDelimiterCharacters = this->FieldDelimiterCharacters;
  if (this->AddTabFieldDelimiter)
  {
    fieldDelimiterCharacters.push_back('\t');
  }
  this->UnicodeFieldDelimiters = fieldDelimiterCharacters;
  this->UnicodeStringDelimiters = tstring;

  if (nullptr == transCodec)
  {
    // should this use the locale instead??
    return 1;
  }

  try
  {
    vtkDelimitedTextCodecIteratorPrivate iterator(this->SkippedRecords, this->MaxRecords,
      this->UnicodeRecordDelimiters, this->UnicodeFieldDelimiters, this->UnicodeStringDelimiters,
      this->UnicodeWhitespace, this->CommentCharacters, this->UnicodeEscapeCharacter,
      this->HaveHeaders, this->MergeConsecutiveDelimiters, this->UseStringDelimiter,
      this->DetectNumericColumns, this->ForceDouble, this->DefaultIntegerValue,
      this->DefaultDoubleValue, output_table);

    transCodec->ToUnicode(*input_stream, iterator);
    iterator.ReachedEndOfInput();