/**
* Retrieve the list of the entries contained in this CHM.
*
* @throws Exception Throws an Exception in case of errors.
*
* @return Entry[]
*/
protected function retrieveEntryList()
{
$result = array();
$chunkOffset = $this->itsf->getDirectoryOffset() + $this->itsp->getHeaderLength();
$chunkSize = $this->itsp->getDirectoryChunkSize();
for ($i = $this->itsp->getFirstPMGLChunkNumber(), $l = $this->itsp->getLastPMGLChunkNumber(); $i <= $l; ++$i) {
$offset = $chunkOffset + $i * $chunkSize;
$this->reader->setPosition($offset);
try {
$pmgl = new Header\PMGL($this->reader);
} catch (UnexpectedHeaderException $x) {
if ($x->getFoundHeader() !== 'PMGI') {
throw $x;
}
$this->reader->setPosition($offset);
$pmgi = new Header\PMGI($this->reader);
$pmgl = null;
}
if ($pmgl !== null) {
$end = $offset + $chunkSize - $pmgl->getFreeSpace();
$cur = $this->reader->getPosition();
while ($cur < $end) {
$this->reader->setPosition($cur);
$entry = new Entry($this);
$result[$entry->getPath()] = $entry;
$cur = $this->reader->getPosition();
}
}
}
return $result;
}
/**
* Initializes the instance.
*
* @param Reader $reader The reader that provides the data.
*
* @throws UnexpectedHeaderException Throws an UnexpectedHeaderException if the header signature is not valid.
* @throws Exception Throws an Exception in case of errors.
*/
public function __construct(Reader $reader)
{
$size = $reader->readUInt32();
if ($size < 6) {
throw new Exception('The LZXC entry is too small');
}
parent::__construct($reader);
if ($this->headerSignature !== 'LZXC') {
throw UnexpectedHeaderException::create('LZXC', $this->headerSignature);
}
$this->version = $reader->readUInt32();
if ($this->version !== 2) {
throw new Exception("Unsupported LZXC header version: {$this->version}");
}
$this->resetInterval = $reader->readUInt32();
$this->windowSize = $reader->readUInt32();
$this->cacheSize = $reader->readUInt32();
}
/**
* Initialize the instance.
*
* @param Reader $reader The reader that provides the data.
*
* @throws \Exception Throws an Exception in case of errors.
*/
public function __construct(Reader $reader)
{
$this->headerSignature = $reader->readString(4);
}