protected static function parseBinaryIdentifier($binaryData, &$offsetIndex)
{
if (strlen($binaryData) <= $offsetIndex) {
throw new ParserException('Can not parse identifier from data: Offset index larger than input size', $offsetIndex);
}
$identifier = $binaryData[$offsetIndex++];
if (Identifier::isLongForm(ord($identifier)) == false) {
return $identifier;
}
while (true) {
if (strlen($binaryData) <= $offsetIndex) {
throw new ParserException('Can not parse identifier (long form) from data: Offset index larger than input size', $offsetIndex);
}
$nextOctet = $binaryData[$offsetIndex++];
$identifier .= $nextOctet;
if ((ord($nextOctet) & 0x80) === 0) {
// the most significant bit is 0 to we have reached the end of the identifier
break;
}
}
return $identifier;
}
/**
* Returns all identifier octets. If an inheriting class models a tag with
* the long form identifier format, it MUST reimplement this method to
* return all octets of the identifier.
*
* @throws LogicException If the identifier format is long form
*
* @return string Identifier as a set of octets
*/
public function getIdentifier()
{
$firstOctet = $this->getType();
if (Identifier::isLongForm($firstOctet)) {
throw new LogicException(sprintf('Identifier of %s uses the long form and must therefor override "Object::getIdentifier()".', get_class($this)));
}
return chr($firstOctet);
}
protected static function parseBinaryIdentifier($binaryData, &$offsetIndex)
{
$identifier = $binaryData[$offsetIndex++];
if (Identifier::isLongForm(ord($identifier)) == false) {
return $identifier;
}
while (true) {
$nextOctet = $binaryData[$offsetIndex++];
$identifier .= $nextOctet;
if ((ord($nextOctet) & 0x80) === 0) {
// the most significant bit is 0 to we have reached the end of the identifier
break;
}
}
return $identifier;
}
