Beispiel #1
0
 /**
  * Initializes 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->reader = $reader;
     $reader->setPosition(0);
     $this->itsf = new Header\ITSF($reader);
     if ($this->itsf->getSectionOffset() >= 0 && $this->itsf->getSectionLength() >= 16) {
         $reader->setPosition($this->itsf->getSectionOffset());
         /* Unknown (510) */
         $reader->readUInt32();
         /* Unknown (0) */
         $reader->readUInt32();
         $totalLength = $reader->readUInt64();
         if ($totalLength !== $reader->getLength()) {
             throw new Exception("Invalid CHM size: expected length {$totalLength}, current length {$reader->getLength()}");
         }
     }
     $reader->setPosition($this->itsf->getDirectoryOffset());
     $this->itsp = new Header\ITSP($reader);
     $expectedDirectoryLength = $this->itsf->getDirectoryLength();
     $calculatedDirectoryLength = $this->itsp->getHeaderLength() + $this->itsp->getNumberOfDirectoryChunks() * $this->itsp->getDirectoryChunkSize();
     if ($expectedDirectoryLength !== $calculatedDirectoryLength) {
         throw new Exception("Unexpected directory list size (expected: {$expectedDirectoryLength}, calculated: {$calculatedDirectoryLength})");
     }
     $this->sections = array();
     $this->sections[0] = new Section\UncompressedSection($this);
     $this->entries = $this->retrieveEntryList();
     $this->retrieveSectionList();
     $this->toc = null;
     $this->index = null;
 }
Beispiel #2
0
 /**
  * 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();
 }