Index: trunk/src/org/tukaani/xz/delta/DeltaCoder.java
===================================================================
--- trunk/src/org/tukaani/xz/delta/DeltaCoder.java	(revision 13350)
+++ 	(revision )
@@ -1,27 +1,0 @@
-/*
- * DeltaCoder
- *
- * 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;
-
-abstract class DeltaCoder {
-    static final int DISTANCE_MIN = 1;
-    static final int DISTANCE_MAX = 256;
-    static final int DISTANCE_MASK = DISTANCE_MAX - 1;
-
-    final int distance;
-    final byte[] history = new byte[DISTANCE_MAX];
-    int pos = 0;
-
-    DeltaCoder(int distance) {
-        if (distance < DISTANCE_MIN || distance > DISTANCE_MAX)
-            throw new IllegalArgumentException();
-
-        this.distance = distance;
-    }
-}
Index: trunk/src/org/tukaani/xz/delta/DeltaDecoder.java
===================================================================
--- trunk/src/org/tukaani/xz/delta/DeltaDecoder.java	(revision 13350)
+++ 	(revision )
@@ -1,24 +1,0 @@
-/*
- * 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];
-        }
-    }
-}
Index: trunk/src/org/tukaani/xz/delta/DeltaEncoder.java
===================================================================
--- trunk/src/org/tukaani/xz/delta/DeltaEncoder.java	(revision 13350)
+++ 	(revision )
@@ -1,24 +1,0 @@
-/*
- * DeltaEncoder
- *
- * 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 DeltaEncoder extends DeltaCoder {
-    public DeltaEncoder(int distance) {
-        super(distance);
-    }
-
-    public void encode(byte[] in, int in_off, int len, byte[] out) {
-        for (int i = 0; i < len; ++i) {
-            byte tmp = history[(distance + pos) & DISTANCE_MASK];
-            history[pos-- & DISTANCE_MASK] = in[in_off + i];
-            out[i] = (byte)(in[in_off + i] - tmp);
-        }
-    }
-}