/**
* Internal method for dumping
*
* @param object the dataset
* @param string the spacer
* @return string the dumped dataset
*/
protected function _dump($dataset, $spacer = '')
{
$out = '';
foreach ($dataset as $group => $elements) {
// Load dictionaries (Forced loading)
Nanodicom_Dictionary::load_dictionary($group, TRUE);
foreach ($elements as $element => $indexes) {
foreach ($indexes as $values) {
$elem = $values;
$elem['g'] = $group;
$elem['e'] = $element;
if (!isset($elem['done'])) {
// Read value if not read yet
$this->_read_value_from_blob($elem, $group, $element);
}
// Indent back when a delimiter was found. Must be done before dumping.
if ($group == Nanodicom::ITEMS_GROUP and in_array($element, array(Nanodicom::ITEM_DELIMITER, Nanodicom::SEQUENCE_DELIMITER))) {
$spacer = substr($spacer, 0, -1 * strlen($this->output['spacer']));
}
// Start the dataset and dump the current element
$out .= $this->output['dataset_begin'] . $this->_dump_element($elem, $spacer);
if (count($elem['ds']) > 0) {
// Take care of items
$out .= $this->_dump($elem['ds'], $spacer . $this->output['spacer']);
}
// Close the dataset
$out .= $this->output['dataset_end'];
}
unset($values);
}
unset($element, $indexes);
}
unset($group, $elements);
return $out;
}
/**
* Read the value from the blob
*
* @param object the element array
* @param integer the group
* @param integer the element
* @return void
*/
protected function _read_value_from_blob(&$elem, $group, $element)
{
// Load dictionaries (Forced loading)
Nanodicom_Dictionary::load_dictionary($group, TRUE);
// Save current pointer
$current_pointer = $this->_tell();
// Values have not been read
$this->_rewind($elem['_off']);
// Decode the right VR.
list($elem['vr'], $multiplicity, $name) = $this->_decode_vr($group, $element, $elem['_vr'], $elem['len']);
// Read the value
list($elem['val'], $elem['vr'], $elem['bin'], $elem['ds']) = $this->_read_value($elem['_vr'], $elem['vr'], $elem['len'], $this->_transfer_syntax);
// Element has been read. Set to true
$elem['done'] = TRUE;
// Rewind to previous pointer, we just read and returned everything back to normal
$this->_rewind($current_pointer);
}