/**
* @param $data
* @throws \Exception
*/
protected function readBinary(&$data)
{
if (strlen($data) < 204) {
throw new \Exception("Too few data!");
}
$this->data = $data;
// ok then, parse the header
$header = substr($this->data, 0, 204);
$header = array_values(unpack("C*", $header));
$this->memScramble($header);
// [0..25]: RedWolf Design GrpFolder
assert("RedWolf Design GrpFolder" === Data::parseStr($header, 0, 25));
// [28::31]: int(1)
assert(1 === Data::parseInt($header, 28));
// [32::35]: int(2)
assert(2 === Data::parseInt($header, 32));
// [36::39]: int(childs)
$this->setNumEntries(Data::parseInt($header, 36));
// [40..71]: author
$this->setAuthor(Data::parseStr($header, 40, 32));
// [72::103]: reserved
// [104::107]: int(created)
$this->setCreated(Data::parseInt($header, 104));
// [108::111]: int(original)
$this->setOriginal(1234567 === Data::parseInt($header, 108));
// [112::203]: reserved
// ok then, parse the file entries
for ($i = 0; $i < $this->getNumEntries(); $i++) {
$offset = 204 + $i * 316;
$data = array_values(unpack("C*", substr($this->data, $offset, 316)));
$entry = new C4GroupEntry($data);
$dataOffset = 204 + $this->getNumEntries() * 316 + $entry->getDataOffset();
$entry->setData(substr($this->data, $dataOffset, $entry->getFileSize()));
$this->addEntry($entry);
}
$this->data = null;
}
/**
* @param C4GroupEntry $entry
* @return C4Group|C4Scenario|mixed
*/
public static function getInstance(C4GroupEntry &$entry)
{
// TODO: implement proper subclasses
switch (strtolower(pathinfo($entry->getFilename(), PATHINFO_EXTENSION))) {
case "c4s":
return C4Scenario::fromBinary($entry->getData());
case "c4f":
return C4Group::fromBinary($entry->getData());
case "c4d":
return C4Group::fromBinary($entry->getData());
case "c4g":
return C4Group::fromBinary($entry->getData());
default:
return $entry->getData();
}
}
