diff -r 4252bfc396fc -r d382dacfd73f emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/zip/Adler32.java
--- a/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/zip/Adler32.java	Tue Feb 26 14:55:55 2013 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,139 +0,0 @@
-/* -*-mode:java; c-basic-offset:2; -*- */
-/*
-Copyright (c) 2000-2011 ymnk, JCraft,Inc. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-  1. Redistributions of source code must retain the above copyright notice,
-     this list of conditions and the following disclaimer.
-
-  2. Redistributions in binary form must reproduce the above copyright 
-     notice, this list of conditions and the following disclaimer in 
-     the documentation and/or other materials provided with the distribution.
-
-  3. The names of the authors may not be used to endorse or promote products
-     derived from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
-INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
-INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
-INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
-OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
-EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-/*
- * This program is based on zlib-1.1.3, so all credit should go authors
- * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
- * and contributors of zlib.
- */
-
-package org.apidesign.bck2brwsr.emul.zip;
-
-final class Adler32 implements Checksum {
-
-  // largest prime smaller than 65536
-  static final private int BASE=65521; 
-  // NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1
-  static final private int NMAX=5552;
-
-  private long s1=1L;
-  private long s2=0L;
-
-  public void reset(long init){
-    s1=init&0xffff;
-    s2=(init>>16)&0xffff;
-  }
-
-  public void reset(){
-    s1=1L;
-    s2=0L;
-  }
-
-  public long getValue(){
-    return ((s2<<16)|s1);
-  }
-
-  public void update(byte[] buf, int index, int len){
-
-    if(len==1){
-      s1+=buf[index++]&0xff; s2+=s1;
-      s1%=BASE;
-      s2%=BASE;
-      return;
-    }
-
-    int len1 = len/NMAX;
-    int len2 = len%NMAX;
-    while(len1-->0) {
-      int k=NMAX;
-      len-=k;
-      while(k-->0){
-	s1+=buf[index++]&0xff; s2+=s1;
-      }
-      s1%=BASE;
-      s2%=BASE;
-    }
-
-    int k=len2;
-    len-=k;
-    while(k-->0){
-      s1+=buf[index++]&0xff; s2+=s1;
-    }
-    s1%=BASE;
-    s2%=BASE;
-  }
-
-  public Adler32 copy(){
-    Adler32 foo = new Adler32();
-    foo.s1 = this.s1;
-    foo.s2 = this.s2;
-    return foo;
-  }
-
-  // The following logic has come from zlib.1.2.
-  static long combine(long adler1, long adler2, long len2){
-    long BASEL = (long)BASE;
-    long sum1;
-    long sum2;
-    long rem;  // unsigned int
-
-    rem = len2 % BASEL;
-    sum1 = adler1 & 0xffffL;
-    sum2 = rem * sum1;
-    sum2 %= BASEL; // MOD(sum2);
-    sum1 += (adler2 & 0xffffL) + BASEL - 1;
-    sum2 += ((adler1 >> 16) & 0xffffL) + ((adler2 >> 16) & 0xffffL) + BASEL - rem;
-    if (sum1 >= BASEL) sum1 -= BASEL;
-    if (sum1 >= BASEL) sum1 -= BASEL;
-    if (sum2 >= (BASEL << 1)) sum2 -= (BASEL << 1);
-    if (sum2 >= BASEL) sum2 -= BASEL;
-    return sum1 | (sum2 << 16);
-  }
-
-/*
-  private java.util.zip.Adler32 adler=new java.util.zip.Adler32();
-  public void update(byte[] buf, int index, int len){
-    if(buf==null) {adler.reset();}
-    else{adler.update(buf, index, len);}
-  }
-  public void reset(){
-    adler.reset();
-  }
-  public void reset(long init){
-    if(init==1L){
-      adler.reset();
-    }
-    else{
-      System.err.println("unsupported operation");
-    }
-  }
-  public long getValue(){
-    return adler.getValue();
-  }
-*/
-}