/**
* Constructor
*
* @param io.archive.zip.ZipArchiveWriter writer
* @param io.archive.zip.ZipFileEntry file
*/
public function __construct(ZipArchiveWriter $writer, ZipFileEntry $file)
{
$this->writer = $writer;
$this->file = $file;
$this->data = NULL;
$this->md = CRC32::digest();
}
/**
* Constructor
*
* @param io.streams.OutputStream out
* @param int level default 6
* @throws lang.IllegalArgumentException if the level is not between 0 and 9
*/
public function __construct(OutputStream $out, $level = 6)
{
if ($level < 0 || $level > 9) {
throw new IllegalArgumentException('Level ' . $level . ' out of range [0..9]');
}
// Write GZIP format header:
// * ID1, ID2 (Identification, \x1F, \x8B)
// * CM (Compression Method, 8 = deflate)
// * FLG (Flags, use 0)
// * MTIME (Modification time, Un*x timestamp)
// * XFL (Extra flags, 2 = compressor used maximum compression)
// * OS (Operating system, 255 = unknown)
$out->write(pack('CCCCVCC', 0x1f, 0x8b, 8, 0, time(), 2, 255));
// Now, convert stream to file handle and append deflating filter
$this->out = Streams::writeableFd($out);
if (!($this->filter = stream_filter_append($this->out, 'zlib.deflate', STREAM_FILTER_WRITE, $level))) {
fclose($this->out);
$this->out = NULL;
throw new IOException('Could not append stream filter');
}
$this->md = CRC32::digest();
}
/**
* Creates a new message digest object
*
* @return security.checksum.MessageDigestImpl
*/
protected function newDigest()
{
return CRC32::digest();
}
