1 /* 2 * LZMA2Decoder 3 * 4 * Author: Lasse Collin <lasse.collin (at) tukaani.org> 5 * 6 * This file has been put into the public domain. 7 * You can do whatever you want with this file. 8 */ 9 10 package org.tukaani.xz; 11 12 import java.io.InputStream; 13 14 class LZMA2Decoder extends LZMA2Coder implements FilterDecoder { 15 private int dictSize; 16 17 LZMA2Decoder(byte[] props) throws UnsupportedOptionsException { 18 // Up to 1.5 GiB dictionary is supported. The bigger ones 19 // are too big for int. 20 if (props.length != 1 || (props[0] & 0xFF) > 37) 21 throw new UnsupportedOptionsException( 22 "Unsupported LZMA2 properties"); 23 24 dictSize = 2 | (props[0] & 1); 25 dictSize <<= (props[0] >>> 1) + 11; 26 } 27 28 public int getMemoryUsage() { 29 return LZMA2InputStream.getMemoryUsage(dictSize); 30 } 31 32 public InputStream getInputStream(InputStream in) { 33 return new LZMA2InputStream(in, dictSize); 34 } 35 } 36
