CsvFile::incrementCurrentPosition

protected function incrementCurrentPosition(): void
{
	$this->currentPosition ++;
	$this->bufferPosition ++;
	if ($this->bufferPosition >= $this->bufferSize)
	{
		$this->buffer = $this->read( 1024 * 1024);
		$this->bufferSize = $this->getStringByteLength($this->buffer);
		$this->bufferPosition = 0;
	}
}