org.tukaani.xz.LZMA2Decoder Maven / Gradle / Ivy
/*
* LZMA2Decoder
*
* Author: Lasse Collin
*
* This file has been put into the public domain.
* You can do whatever you want with this file.
*/
package org.tukaani.xz;
import java.io.InputStream;
class LZMA2Decoder extends LZMA2Coder implements FilterDecoder {
private int dictSize;
LZMA2Decoder(byte[] props) throws UnsupportedOptionsException {
// Up to 1.5 GiB dictionary is supported. The bigger ones
// are too big for int.
if (props.length != 1 || (props[0] & 0xFF) > 37)
throw new UnsupportedOptionsException(
"Unsupported LZMA2 properties");
dictSize = 2 | (props[0] & 1);
dictSize <<= (props[0] >>> 1) + 11;
}
public int getMemoryUsage() {
return LZMA2InputStream.getMemoryUsage(dictSize);
}
public InputStream getInputStream(InputStream in) {
return new LZMA2InputStream(in, dictSize);
}
}