| /* |
| * DeltaDecoder |
| * |
| * Author: Lasse Collin <lasse.collin@tukaani.org> |
| * |
| * This file has been put into the public domain. |
| * You can do whatever you want with this file. |
| */ |
| |
| package org.tukaani.xz.delta; |
| |
| public class DeltaDecoder extends DeltaCoder { |
| public DeltaDecoder(int distance) { |
| super(distance); |
| } |
| |
| public void decode(byte[] buf, int off, int len) { |
| int end = off + len; |
| for (int i = off; i < end; ++i) { |
| buf[i] += history[(distance + pos) & DISTANCE_MASK]; |
| history[pos-- & DISTANCE_MASK] = buf[i]; |
| } |
| } |
| } |