private function createCompressedStream(Sector $sector)
{
$stream = $this->stream;
if ($this->block->isCompressed() && $this->block->getSize() > $this->block->getCompressedSize()) {
$parser = new BinaryStreamParser($this->stream);
$compressionType = $parser->readByte();
switch ($compressionType) {
case 0x0:
return $stream;
case 0x2:
$len = $parser->readUInt16();
$blockData = $stream->readBytes($len);
return new MemoryStream(gzinflate($blockData));
// case 0x02: return new CompressedStream($stream, new DeflateCompression());
// case 0x02: return new CompressedStream($stream, new DeflateCompression());
case 0x10:
return new CompressedStream($stream, new BZIPCompression());
default:
throw new CompressionException(sprintf('Invalid compression format: %s', $compressionType));
}
}
return $stream;
}
private function parseBlockTable()
{
$hashing = new FileKeyHashing();
$encryptedStream = new EncryptedStream($this->stream, new DefaultEncryption($hashing->hash('(block table)')));
$parser = new BinaryStreamParser($encryptedStream);
$parser->seek($this->getUserDataOffset() + $this->getHeader()->getBlockTablePos());
$blocks = array();
// $offsetFix = 0;
for ($i = 0; $i < $this->getHeader()->getBlockTableSize(); $i++) {
$block = $blocks[$i] = Block::parse($parser);
// if($block->getSize() == 0) {
// $offsetFix++;
// }
}
return new BlockTable($blocks);
}
public function testExistsFlag()
{
$parser = $this->createMemoryParser(hex2bin(self::TEST_EXISTS_BLOCK_DATA));
$block = Block::parse($parser);
$this->assertEquals(true, $block->isExisting());
}
