diff --git a/res/values/strings.xml b/res/values/strings.xml index be2a671d0..47916fce5 100644 --- a/res/values/strings.xml +++ b/res/values/strings.xml @@ -332,6 +332,11 @@ Welcome to K-9 Mail setup. K-9 is an open source mail client for Android origin Delete from server Mark as read on server + Use compression on network: + Mobile + Wi-Fi + Other + Expunge messages Immediately after delete or move During each poll diff --git a/src/com/fsck/k9/Account.java b/src/com/fsck/k9/Account.java index cab6316a8..b885b7378 100644 --- a/src/com/fsck/k9/Account.java +++ b/src/com/fsck/k9/Account.java @@ -3,6 +3,7 @@ package com.fsck.k9; import android.content.Context; import android.content.SharedPreferences; +import android.net.ConnectivityManager; import android.net.Uri; import com.fsck.k9.mail.Address; import com.fsck.k9.mail.Folder; @@ -12,8 +13,11 @@ import com.fsck.k9.mail.store.LocalStore; import com.fsck.k9.mail.store.LocalStore.LocalFolder; import java.util.ArrayList; import java.util.Arrays; +import java.util.HashMap; import java.util.List; +import java.util.Map; import java.util.UUID; +import java.util.concurrent.ConcurrentHashMap; /** * Account stores all of the settings for a single account defined by the user. It is able to save @@ -29,6 +33,11 @@ public class Account public static final int DELETE_POLICY_7DAYS = 1; public static final int DELETE_POLICY_ON_DELETE = 2; public static final int DELETE_POLICY_MARK_AS_READ = 3; + + public static final String TYPE_WIFI = "WIFI"; + public static final String TYPE_MOBILE = "MOBILE"; + public static final String TYPE_OTHER = "OTHER"; + private static String[] networkTypes = { TYPE_WIFI, TYPE_MOBILE, TYPE_OTHER }; /** *
@@ -69,6 +78,7 @@ public class Account
     private boolean mIsSignatureBeforeQuotedText;
     private String mExpungePolicy = EXPUNGE_IMMEDIATELY;
     private int mMaxPushFolders;
+    private Map compressionMap = new ConcurrentHashMap(); 
 
     private List identities;
 
@@ -106,7 +116,7 @@ public class Account
         mExpungePolicy = EXPUNGE_IMMEDIATELY;
         mAutoExpandFolderName = "INBOX";
         mMaxPushFolders = 10;
-
+        
         identities = new ArrayList();
 
         Identity identity = new Identity();
@@ -157,6 +167,13 @@ public class Account
         mExpungePolicy = preferences.getPreferences().getString(mUuid  + ".expungePolicy", EXPUNGE_IMMEDIATELY);
 
         mMaxPushFolders = preferences.getPreferences().getInt(mUuid + ".maxPushFolders", 10);
+        
+        for (String type : networkTypes)
+        {
+            Boolean useCompression = preferences.getPreferences().getBoolean(mUuid + ".useCompression." + type,
+                    true);
+            compressionMap.put(type, useCompression);
+        }
 
         // Between r418 and r431 (version 0.103), folder names were set empty if the Incoming settings were
         // opened for non-IMAP accounts.  0.103 was never a market release, so perhaps this code
@@ -292,6 +309,10 @@ public class Account
         editor.remove(mUuid + ".signatureBeforeQuotedText");
         editor.remove(mUuid + ".expungePolicy");
         editor.remove(mUuid + ".maxPushFolders");
+        for (String type : networkTypes)
+        {
+            editor.remove(mUuid + ".useCompression." + type);
+        }
         deleteIdentities(preferences.getPreferences(), editor);
         editor.commit();
     }
@@ -364,6 +385,14 @@ public class Account
         editor.putBoolean(mUuid + ".signatureBeforeQuotedText", this.mIsSignatureBeforeQuotedText);
         editor.putString(mUuid + ".expungePolicy", mExpungePolicy);
         editor.putInt(mUuid + ".maxPushFolders", mMaxPushFolders);
+        for (String type : networkTypes)
+        {
+            Boolean useCompression = compressionMap.get(type);
+            if (useCompression != null)
+            {
+                editor.putBoolean(mUuid + ".useCompression." + type, useCompression);
+            }
+        }
         saveIdentities(preferences.getPreferences(), editor);
 
         editor.commit();
@@ -810,6 +839,39 @@ public class Account
         return mDescription;
     }
     
+    public void setCompression(String networkType, boolean useCompression)
+    {
+        compressionMap.put(networkType, useCompression);
+    }
+    
+    public boolean useCompression(String networkType)
+    {
+        Boolean useCompression = compressionMap.get(networkType);
+        if (useCompression == null)
+        {
+            return true;
+        }
+        else
+        {
+            return useCompression;
+        }
+    }
+    
+    public boolean useCompression(int type)
+    {
+        String networkType = TYPE_OTHER;
+        switch (type)
+        {
+            case ConnectivityManager.TYPE_MOBILE:
+                networkType = TYPE_MOBILE;
+                break;
+            case ConnectivityManager.TYPE_WIFI:
+                networkType = TYPE_WIFI;
+                break;
+        }
+        return useCompression(networkType);
+    }
+    
     @Override
     public boolean equals(Object o)
     {
diff --git a/src/com/fsck/k9/activity/setup/AccountSetupIncoming.java b/src/com/fsck/k9/activity/setup/AccountSetupIncoming.java
index 7ff0bd0f5..0d6c01e1c 100644
--- a/src/com/fsck/k9/activity/setup/AccountSetupIncoming.java
+++ b/src/com/fsck/k9/activity/setup/AccountSetupIncoming.java
@@ -11,6 +11,7 @@ import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.*;
+
 import com.fsck.k9.*;
 import com.fsck.k9.activity.ChooseFolder;
 import java.io.UnsupportedEncodingException;
@@ -79,6 +80,9 @@ public class AccountSetupIncoming extends K9Activity implements OnClickListener
     private Button mNextButton;
     private Account mAccount;
     private boolean mMakeDefault;
+    private CheckBox compressionMobile;
+    private CheckBox compressionWifi;
+    private CheckBox compressionOther;
 
     public static void actionIncomingSettings(Activity context, Account account, boolean makeDefault)
     {
@@ -118,6 +122,9 @@ public class AccountSetupIncoming extends K9Activity implements OnClickListener
         mWebdavAuthPathView = (EditText)findViewById(R.id.webdav_auth_path);
         mWebdavMailboxPathView = (EditText)findViewById(R.id.webdav_mailbox_path);
         mNextButton = (Button)findViewById(R.id.next);
+        compressionMobile = (CheckBox)findViewById(R.id.compression_mobile);
+        compressionWifi = (CheckBox)findViewById(R.id.compression_wifi);
+        compressionOther = (CheckBox)findViewById(R.id.compression_other);
 
         mImapFolderDrafts.setOnClickListener(this);
         mImapFolderSent.setOnClickListener(this);
@@ -279,6 +286,7 @@ public class AccountSetupIncoming extends K9Activity implements OnClickListener
                 findViewById(R.id.webdav_path_prefix_section).setVisibility(View.GONE);
                 findViewById(R.id.webdav_path_debug_section).setVisibility(View.GONE);
                 findViewById(R.id.account_auth_type).setVisibility(View.GONE);
+                findViewById(R.id.compression_section).setVisibility(View.GONE);
                 mAccount.setDeletePolicy(Account.DELETE_POLICY_NEVER);
 
 
@@ -312,6 +320,7 @@ public class AccountSetupIncoming extends K9Activity implements OnClickListener
                 /** Hide the unnecessary fields */
                 findViewById(R.id.imap_path_prefix_section).setVisibility(View.GONE);
                 findViewById(R.id.account_auth_type).setVisibility(View.GONE);
+                findViewById(R.id.compression_section).setVisibility(View.GONE);
                 if (uri.getPath() != null && uri.getPath().length() > 0)
                 {
                     String[] pathParts = uri.getPath().split("\\|");
@@ -358,7 +367,9 @@ public class AccountSetupIncoming extends K9Activity implements OnClickListener
                     SpinnerOption.setSpinnerOptionValue(mSecurityTypeView, i);
                 }
             }
-
+            compressionMobile.setChecked(mAccount.useCompression(Account.TYPE_MOBILE));
+            compressionWifi.setChecked(mAccount.useCompression(Account.TYPE_WIFI));
+            compressionOther.setChecked(mAccount.useCompression(Account.TYPE_OTHER));
             if (uri.getHost() != null)
             {
                 mServerView.setText(uri.getHost());
@@ -518,6 +529,9 @@ public class AccountSetupIncoming extends K9Activity implements OnClickListener
             mAccount.setSentFolderName(mImapFolderSent.getText().toString());
             mAccount.setTrashFolderName(mImapFolderTrash.getText().toString());
             mAccount.setOutboxFolderName(mImapFolderOutbox.getText().toString());
+            mAccount.setCompression(Account.TYPE_MOBILE, compressionMobile.isChecked());
+            mAccount.setCompression(Account.TYPE_WIFI, compressionWifi.isChecked());
+            mAccount.setCompression(Account.TYPE_OTHER, compressionOther.isChecked());
             AccountSetupCheckSettings.actionCheckSettings(this, mAccount, true, false);
         }
         catch (Exception e)
diff --git a/src/com/fsck/k9/mail/store/ImapStore.java b/src/com/fsck/k9/mail/store/ImapStore.java
index 219cd0fb3..7bb3bd4a9 100644
--- a/src/com/fsck/k9/mail/store/ImapStore.java
+++ b/src/com/fsck/k9/mail/store/ImapStore.java
@@ -1,8 +1,10 @@
 
 package com.fsck.k9.mail.store;
 
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
 import android.util.Log;
-
 import com.fsck.k9.Account;
 import com.fsck.k9.K9;
 import com.fsck.k9.PeekableInputStream;
@@ -13,6 +15,9 @@ import com.fsck.k9.mail.store.ImapResponseParser.ImapList;
 import com.fsck.k9.mail.store.ImapResponseParser.ImapResponse;
 import com.fsck.k9.mail.transport.CountingOutputStream;
 import com.fsck.k9.mail.transport.EOLConvertingOutputStream;
+import com.jcraft.jzlib.JZlib;
+import com.jcraft.jzlib.ZInputStream;
+import com.jcraft.jzlib.ZOutputStream;
 import com.beetstra.jutf7.CharsetProvider;
 
 import javax.net.ssl.SSLContext;
@@ -67,6 +72,9 @@ public class ImapStore extends Store
 
     private static final String CAPABILITY_CAPABILITY = "CAPABILITY";
     private static final String COMMAND_CAPABILITY = "CAPABILITY";
+    
+    private static final String CAPABILITY_COMPRESS_DEFLATE = "COMPRESS=DEFLATE";
+    private static final String COMMAND_COMPRESS_DEFLATE = "COMPRESS DEFLATE";
 
     private String mHost;
     private int mPort;
@@ -100,11 +108,12 @@ public class ImapStore extends Store
      * imap+tls+://auth:user:password@server:port CONNECTION_SECURITY_TLS_REQUIRED
      * imap+ssl+://auth:user:password@server:port CONNECTION_SECURITY_SSL_REQUIRED
      * imap+ssl://auth:user:password@server:port CONNECTION_SECURITY_SSL_OPTIONAL
+     *
+     * @param _uri
      */
     public ImapStore(Account account) throws MessagingException
     {
         super(account);
-
         URI uri;
         try
         {
@@ -1910,7 +1919,8 @@ public class ImapStore extends Store
                 
                 if (hasCapability(CAPABILITY_CAPABILITY) == false)
                 {
-                    Log.i(K9.LOG_TAG, "Did not get capabilities in banner, requesting CAPABILITY for " + getLogId());
+                    if (K9.DEBUG)
+                        Log.i(K9.LOG_TAG, "Did not get capabilities in banner, requesting CAPABILITY for " + getLogId());
                     List responses = receiveCapabilities(executeSimpleCommand(COMMAND_CAPABILITY));
                     if (responses.size() != 2)
                     {
@@ -1954,10 +1964,11 @@ public class ImapStore extends Store
                     if (mAuthType == AuthType.CRAM_MD5)
                     {
                         authCramMD5();
-                        // The authCramMD5 method on the previous line does not allow for handling updated capabilities
+                        // The authCramMD5 method called on the previous line does not allow for handling updated capabilities
                         // sent by the server.  So, to make sure we update to the post-authentication capability list
                         // we fetch the capabilities here.
-                        Log.i(K9.LOG_TAG, "Updating capabilities after CRAM-MD5 authentication for " + getLogId());
+                        if (K9.DEBUG)
+                            Log.i(K9.LOG_TAG, "Updating capabilities after CRAM-MD5 authentication for " + getLogId());
                         List responses = receiveCapabilities(executeSimpleCommand(COMMAND_CAPABILITY));
                         if (responses.size() != 2)
                         {
@@ -1980,6 +1991,51 @@ public class ImapStore extends Store
                 {
                     throw new AuthenticationFailedException(null, me);
                 }
+                if (K9.DEBUG)
+                {
+                    Log.d(K9.LOG_TAG, CAPABILITY_COMPRESS_DEFLATE + " = " + hasCapability(CAPABILITY_COMPRESS_DEFLATE));
+                }
+                if (hasCapability(CAPABILITY_COMPRESS_DEFLATE))
+                {
+                    ConnectivityManager connectivityManager = (ConnectivityManager)K9.app.getSystemService(Context.CONNECTIVITY_SERVICE);
+                    boolean useCompression = true;
+                    
+                    NetworkInfo netInfo = connectivityManager.getActiveNetworkInfo();
+                    if (netInfo != null)
+                    {
+                        int type = netInfo.getType();
+                        if (K9.DEBUG)
+                            Log.d(K9.LOG_TAG, "On network type " + type);
+                        useCompression = mAccount.useCompression(type);
+                        
+                    }
+                    if (K9.DEBUG)
+                        Log.d(K9.LOG_TAG, "useCompression " + useCompression);
+                    if (useCompression)
+                    {
+                        try
+                        {
+                            executeSimpleCommand(COMMAND_COMPRESS_DEFLATE);
+                            ZInputStream zInputStream = new ZInputStream(mSocket.getInputStream(), true);
+                            zInputStream.setFlushMode(JZlib.Z_PARTIAL_FLUSH);
+                            mIn = new PeekableInputStream(new BufferedInputStream(zInputStream, 1024));
+                            mParser = new ImapResponseParser(mIn);
+                            ZOutputStream zOutputStream = new ZOutputStream(mSocket.getOutputStream(), JZlib.Z_BEST_SPEED, true);
+                            mOut = new BufferedOutputStream(zOutputStream, 1024);
+                            zOutputStream.setFlushMode(JZlib.Z_PARTIAL_FLUSH);
+                            if (K9.DEBUG)
+                            {
+                                Log.i(K9.LOG_TAG, "Compression enabled for " + getLogId());
+                            }
+                        }
+                        catch (Exception e)
+                        {
+                            Log.e(K9.LOG_TAG, "Unable to negotiate compression", e);
+                        }
+                    }
+                }
+                
+                
                 if (K9.DEBUG)
                     Log.d(K9.LOG_TAG, "NAMESPACE = " + hasCapability(CAPABILITY_NAMESPACE)
                           + ", mPathPrefix = " + mPathPrefix);
diff --git a/src/com/jcraft/jzlib/Adler32.java b/src/com/jcraft/jzlib/Adler32.java
new file mode 100644
index 000000000..d8b6ef863
--- /dev/null
+++ b/src/com/jcraft/jzlib/Adler32.java
@@ -0,0 +1,94 @@
+/* -*-mode:java; c-basic-offset:2; -*- */
+/*
+Copyright (c) 2000,2001,2002,2003 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 com.jcraft.jzlib;
+
+final class Adler32{
+
+  // 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;
+
+  long adler32(long adler, byte[] buf, int index, int len){
+    if(buf == null){ return 1L; }
+
+    long s1=adler&0xffff;
+    long s2=(adler>>16)&0xffff;
+    int k;
+
+    while(len > 0) {
+      k=len=16){
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        s1+=buf[index++]&0xff; s2+=s1;
+        k-=16;
+      }
+      if(k!=0){
+        do{
+          s1+=buf[index++]&0xff; s2+=s1;
+        }
+        while(--k!=0);
+      }
+      s1%=BASE;
+      s2%=BASE;
+    }
+    return (s2<<16)|s1;
+  }
+
+  /*
+  private java.util.zip.Adler32 adler=new java.util.zip.Adler32();
+  long adler32(long value, byte[] buf, int index, int len){
+    if(value==1) {adler.reset();}
+    if(buf==null) {adler.reset();}
+    else{adler.update(buf, index, len);}
+    return adler.getValue();
+  }
+  */
+}
diff --git a/src/com/jcraft/jzlib/Deflate.java b/src/com/jcraft/jzlib/Deflate.java
new file mode 100644
index 000000000..99788020b
--- /dev/null
+++ b/src/com/jcraft/jzlib/Deflate.java
@@ -0,0 +1,1623 @@
+/* -*-mode:java; c-basic-offset:2; -*- */
+/*
+Copyright (c) 2000,2001,2002,2003 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 com.jcraft.jzlib;
+
+public 
+final class Deflate{
+
+  static final private int MAX_MEM_LEVEL=9;
+
+  static final private int Z_DEFAULT_COMPRESSION=-1;
+
+  static final private int MAX_WBITS=15;            // 32K LZ77 window
+  static final private int DEF_MEM_LEVEL=8;
+
+  static class Config{
+    int good_length; // reduce lazy search above this match length
+    int max_lazy;    // do not perform lazy search above this match length
+    int nice_length; // quit search above this match length
+    int max_chain;
+    int func;
+    Config(int good_length, int max_lazy, 
+	   int nice_length, int max_chain, int func){
+      this.good_length=good_length;
+      this.max_lazy=max_lazy;
+      this.nice_length=nice_length;
+      this.max_chain=max_chain;
+      this.func=func;
+    }
+  }
+  
+  static final private int STORED=0;
+  static final private int FAST=1;
+  static final private int SLOW=2;
+  static final private Config[] config_table;    
+  static{
+    config_table=new Config[10];
+    //                         good  lazy  nice  chain
+    config_table[0]=new Config(0,    0,    0,    0, STORED);
+    config_table[1]=new Config(4,    4,    8,    4, FAST);
+    config_table[2]=new Config(4,    5,   16,    8, FAST);
+    config_table[3]=new Config(4,    6,   32,   32, FAST);
+
+    config_table[4]=new Config(4,    4,   16,   16, SLOW);
+    config_table[5]=new Config(8,   16,   32,   32, SLOW);
+    config_table[6]=new Config(8,   16,  128,  128, SLOW);
+    config_table[7]=new Config(8,   32,  128,  256, SLOW);
+    config_table[8]=new Config(32, 128,  258, 1024, SLOW);
+    config_table[9]=new Config(32, 258,  258, 4096, SLOW);
+  }
+
+  static final private String[] z_errmsg = {
+    "need dictionary",     // Z_NEED_DICT       2
+    "stream end",          // Z_STREAM_END      1
+    "",                    // Z_OK              0
+    "file error",          // Z_ERRNO         (-1)
+    "stream error",        // Z_STREAM_ERROR  (-2)
+    "data error",          // Z_DATA_ERROR    (-3)
+    "insufficient memory", // Z_MEM_ERROR     (-4)
+    "buffer error",        // Z_BUF_ERROR     (-5)
+    "incompatible version",// Z_VERSION_ERROR (-6)
+    ""
+  };
+
+  // block not completed, need more input or more output
+  static final private int NeedMore=0; 
+
+  // block flush performed
+  static final private int BlockDone=1; 
+
+  // finish started, need only more output at next deflate
+  static final private int FinishStarted=2;
+
+  // finish done, accept no more input or output
+  static final private int FinishDone=3;
+
+  // preset dictionary flag in zlib header
+  static final private int PRESET_DICT=0x20;
+
+  static final private int Z_FILTERED=1;
+  static final private int Z_HUFFMAN_ONLY=2;
+  static final private int Z_DEFAULT_STRATEGY=0;
+
+  static final private int Z_NO_FLUSH=0;
+  static final private int Z_PARTIAL_FLUSH=1;
+  static final private int Z_SYNC_FLUSH=2;
+  static final private int Z_FULL_FLUSH=3;
+  static final private int Z_FINISH=4;
+
+  static final private int Z_OK=0;
+  static final private int Z_STREAM_END=1;
+  static final private int Z_NEED_DICT=2;
+  static final private int Z_ERRNO=-1;
+  static final private int Z_STREAM_ERROR=-2;
+  static final private int Z_DATA_ERROR=-3;
+  static final private int Z_MEM_ERROR=-4;
+  static final private int Z_BUF_ERROR=-5;
+  static final private int Z_VERSION_ERROR=-6;
+
+  static final private int INIT_STATE=42;
+  static final private int BUSY_STATE=113;
+  static final private int FINISH_STATE=666;
+
+  // The deflate compression method
+  static final private int Z_DEFLATED=8;
+
+  static final private int STORED_BLOCK=0;
+  static final private int STATIC_TREES=1;
+  static final private int DYN_TREES=2;
+
+  // The three kinds of block type
+  static final private int Z_BINARY=0;
+  static final private int Z_ASCII=1;
+  static final private int Z_UNKNOWN=2;
+
+  static final private int Buf_size=8*2;
+
+  // repeat previous bit length 3-6 times (2 bits of repeat count)
+  static final private int REP_3_6=16; 
+
+  // repeat a zero length 3-10 times  (3 bits of repeat count)
+  static final private int REPZ_3_10=17; 
+
+  // repeat a zero length 11-138 times  (7 bits of repeat count)
+  static final private int REPZ_11_138=18; 
+
+  static final private int MIN_MATCH=3;
+  static final private int MAX_MATCH=258;
+  static final private int MIN_LOOKAHEAD=(MAX_MATCH+MIN_MATCH+1);
+
+  static final private int MAX_BITS=15;
+  static final private int D_CODES=30;
+  static final private int BL_CODES=19;
+  static final private int LENGTH_CODES=29;
+  static final private int LITERALS=256;
+  static final private int L_CODES=(LITERALS+1+LENGTH_CODES);
+  static final private int HEAP_SIZE=(2*L_CODES+1);
+
+  static final private int END_BLOCK=256;
+
+  ZStream strm;         // pointer back to this zlib stream
+  int status;           // as the name implies
+  byte[] pending_buf;   // output still pending
+  int pending_buf_size; // size of pending_buf
+  int pending_out;      // next pending byte to output to the stream
+  int pending;          // nb of bytes in the pending buffer
+  int noheader;         // suppress zlib header and adler32
+  byte data_type;       // UNKNOWN, BINARY or ASCII
+  byte method;          // STORED (for zip only) or DEFLATED
+  int last_flush;       // value of flush param for previous deflate call
+
+  int w_size;           // LZ77 window size (32K by default)
+  int w_bits;           // log2(w_size)  (8..16)
+  int w_mask;           // w_size - 1
+
+  byte[] window;
+  // Sliding window. Input bytes are read into the second half of the window,
+  // and move to the first half later to keep a dictionary of at least wSize
+  // bytes. With this organization, matches are limited to a distance of
+  // wSize-MAX_MATCH bytes, but this ensures that IO is always
+  // performed with a length multiple of the block size. Also, it limits
+  // the window size to 64K, which is quite useful on MSDOS.
+  // To do: use the user input buffer as sliding window.
+
+  int window_size;
+  // Actual size of window: 2*wSize, except when the user input buffer
+  // is directly used as sliding window.
+
+  short[] prev;
+  // Link to older string with same hash index. To limit the size of this
+  // array to 64K, this link is maintained only for the last 32K strings.
+  // An index in this array is thus a window index modulo 32K.
+
+  short[] head; // Heads of the hash chains or NIL.
+
+  int ins_h;          // hash index of string to be inserted
+  int hash_size;      // number of elements in hash table
+  int hash_bits;      // log2(hash_size)
+  int hash_mask;      // hash_size-1
+
+  // Number of bits by which ins_h must be shifted at each input
+  // step. It must be such that after MIN_MATCH steps, the oldest
+  // byte no longer takes part in the hash key, that is:
+  // hash_shift * MIN_MATCH >= hash_bits
+  int hash_shift;
+
+  // Window position at the beginning of the current output block. Gets
+  // negative when the window is moved backwards.
+
+  int block_start;
+
+  int match_length;           // length of best match
+  int prev_match;             // previous match
+  int match_available;        // set if previous match exists
+  int strstart;               // start of string to insert
+  int match_start;            // start of matching string
+  int lookahead;              // number of valid bytes ahead in window
+
+  // Length of the best match at previous step. Matches not greater than this
+  // are discarded. This is used in the lazy match evaluation.
+  int prev_length;
+
+  // To speed up deflation, hash chains are never searched beyond this
+  // length.  A higher limit improves compression ratio but degrades the speed.
+  int max_chain_length;
+
+  // Attempt to find a better match only when the current match is strictly
+  // smaller than this value. This mechanism is used only for compression
+  // levels >= 4.
+  int max_lazy_match;
+
+  // Insert new strings in the hash table only if the match length is not
+  // greater than this length. This saves time but degrades compression.
+  // max_insert_length is used only for compression levels <= 3.
+
+  int level;    // compression level (1..9)
+  int strategy; // favor or force Huffman coding
+
+  // Use a faster search when the previous match is longer than this
+  int good_match;
+
+  // Stop searching when current match exceeds this
+  int nice_match;
+
+  short[] dyn_ltree;       // literal and length tree
+  short[] dyn_dtree;       // distance tree
+  short[] bl_tree;         // Huffman tree for bit lengths
+
+  Tree l_desc=new Tree();  // desc for literal tree
+  Tree d_desc=new Tree();  // desc for distance tree
+  Tree bl_desc=new Tree(); // desc for bit length tree
+
+  // number of codes at each bit length for an optimal tree
+  short[] bl_count=new short[MAX_BITS+1];
+
+  // heap used to build the Huffman trees
+  int[] heap=new int[2*L_CODES+1];
+
+  int heap_len;               // number of elements in the heap
+  int heap_max;               // element of largest frequency
+  // The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
+  // The same heap array is used to build all trees.
+
+  // Depth of each subtree used as tie breaker for trees of equal frequency
+  byte[] depth=new byte[2*L_CODES+1];
+
+  int l_buf;               // index for literals or lengths */
+
+  // Size of match buffer for literals/lengths.  There are 4 reasons for
+  // limiting lit_bufsize to 64K:
+  //   - frequencies can be kept in 16 bit counters
+  //   - if compression is not successful for the first block, all input
+  //     data is still in the window so we can still emit a stored block even
+  //     when input comes from standard input.  (This can also be done for
+  //     all blocks if lit_bufsize is not greater than 32K.)
+  //   - if compression is not successful for a file smaller than 64K, we can
+  //     even emit a stored file instead of a stored block (saving 5 bytes).
+  //     This is applicable only for zip (not gzip or zlib).
+  //   - creating new Huffman trees less frequently may not provide fast
+  //     adaptation to changes in the input data statistics. (Take for
+  //     example a binary file with poorly compressible code followed by
+  //     a highly compressible string table.) Smaller buffer sizes give
+  //     fast adaptation but have of course the overhead of transmitting
+  //     trees more frequently.
+  //   - I can't count above 4
+  int lit_bufsize;
+
+  int last_lit;      // running index in l_buf
+
+  // Buffer for distances. To simplify the code, d_buf and l_buf have
+  // the same number of elements. To use different lengths, an extra flag
+  // array would be necessary.
+
+  int d_buf;         // index of pendig_buf
+
+  int opt_len;        // bit length of current block with optimal trees
+  int static_len;     // bit length of current block with static trees
+  int matches;        // number of string matches in current block
+  int last_eob_len;   // bit length of EOB code for last block
+
+  // Output buffer. bits are inserted starting at the bottom (least
+  // significant bits).
+  short bi_buf;
+
+  // Number of valid bits in bi_buf.  All bits above the last valid bit
+  // are always zero.
+  int bi_valid;
+
+  Deflate(){
+    dyn_ltree=new short[HEAP_SIZE*2];
+    dyn_dtree=new short[(2*D_CODES+1)*2]; // distance tree
+    bl_tree=new short[(2*BL_CODES+1)*2];  // Huffman tree for bit lengths
+  }
+
+  void lm_init() {
+    window_size=2*w_size;
+
+    head[hash_size-1]=0;
+    for(int i=0; i= 3; max_blindex--) {
+      if (bl_tree[Tree.bl_order[max_blindex]*2+1] != 0) break;
+    }
+    // Update opt_len to include the bit length tree and counts
+    opt_len += 3*(max_blindex+1) + 5+5+4;
+
+    return max_blindex;
+  }
+
+
+  // Send the header for a block using dynamic Huffman trees: the counts, the
+  // lengths of the bit length codes, the literal tree and the distance tree.
+  // IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
+  void send_all_trees(int lcodes, int dcodes, int blcodes){
+    int rank;                    // index in bl_order
+
+    send_bits(lcodes-257, 5); // not +255 as stated in appnote.txt
+    send_bits(dcodes-1,   5);
+    send_bits(blcodes-4,  4); // not -3 as stated in appnote.txt
+    for (rank = 0; rank < blcodes; rank++) {
+      send_bits(bl_tree[Tree.bl_order[rank]*2+1], 3);
+    }
+    send_tree(dyn_ltree, lcodes-1); // literal tree
+    send_tree(dyn_dtree, dcodes-1); // distance tree
+  }
+
+  // Send a literal or distance tree in compressed form, using the codes in
+  // bl_tree.
+  void send_tree (short[] tree,// the tree to be sent
+		  int max_code // and its largest code of non zero frequency
+		  ){
+    int n;                     // iterates over all tree elements
+    int prevlen = -1;          // last emitted length
+    int curlen;                // length of current code
+    int nextlen = tree[0*2+1]; // length of next code
+    int count = 0;             // repeat count of the current code
+    int max_count = 7;         // max repeat count
+    int min_count = 4;         // min repeat count
+
+    if (nextlen == 0){ max_count = 138; min_count = 3; }
+
+    for (n = 0; n <= max_code; n++) {
+      curlen = nextlen; nextlen = tree[(n+1)*2+1];
+      if(++count < max_count && curlen == nextlen) {
+	continue;
+      }
+      else if(count < min_count) {
+	do { send_code(curlen, bl_tree); } while (--count != 0);
+      }
+      else if(curlen != 0){
+	if(curlen != prevlen){
+	  send_code(curlen, bl_tree); count--;
+	}
+	send_code(REP_3_6, bl_tree); 
+	send_bits(count-3, 2);
+      }
+      else if(count <= 10){
+	send_code(REPZ_3_10, bl_tree); 
+	send_bits(count-3, 3);
+      }
+      else{
+	send_code(REPZ_11_138, bl_tree);
+	send_bits(count-11, 7);
+      }
+      count = 0; prevlen = curlen;
+      if(nextlen == 0){
+	max_count = 138; min_count = 3;
+      }
+      else if(curlen == nextlen){
+	max_count = 6; min_count = 3;
+      }
+      else{
+	max_count = 7; min_count = 4;
+      }
+    }
+  }
+
+  // Output a byte on the stream.
+  // IN assertion: there is enough room in pending_buf.
+  final void put_byte(byte[] p, int start, int len){
+    System.arraycopy(p, start, pending_buf, pending, len);
+    pending+=len;
+  }
+
+  final void put_byte(byte c){
+    pending_buf[pending++]=c;
+  }
+  final void put_short(int w) {
+    put_byte((byte)(w/*&0xff*/));
+    put_byte((byte)(w>>>8));
+  }
+  final void putShortMSB(int b){
+    put_byte((byte)(b>>8));
+    put_byte((byte)(b/*&0xff*/));
+  }   
+
+  final void send_code(int c, short[] tree){
+    int c2=c*2;
+    send_bits((tree[c2]&0xffff), (tree[c2+1]&0xffff));
+  }
+
+  void send_bits(int value, int length){
+    int len = length;
+    if (bi_valid > (int)Buf_size - len) {
+      int val = value;
+//      bi_buf |= (val << bi_valid);
+      bi_buf |= ((val << bi_valid)&0xffff);
+      put_short(bi_buf);
+      bi_buf = (short)(val >>> (Buf_size - bi_valid));
+      bi_valid += len - Buf_size;
+    } else {
+//      bi_buf |= (value) << bi_valid;
+      bi_buf |= (((value) << bi_valid)&0xffff);
+      bi_valid += len;
+    }
+  }
+
+  // Send one empty static block to give enough lookahead for inflate.
+  // This takes 10 bits, of which 7 may remain in the bit buffer.
+  // The current inflate code requires 9 bits of lookahead. If the
+  // last two codes for the previous block (real code plus EOB) were coded
+  // on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
+  // the last real code. In this case we send two empty static blocks instead
+  // of one. (There are no problems if the previous block is stored or fixed.)
+  // To simplify the code, we assume the worst case of last real code encoded
+  // on one bit only.
+  void _tr_align(){
+    send_bits(STATIC_TREES<<1, 3);
+    send_code(END_BLOCK, StaticTree.static_ltree);
+
+    bi_flush();
+
+    // Of the 10 bits for the empty block, we have already sent
+    // (10 - bi_valid) bits. The lookahead for the last real code (before
+    // the EOB of the previous block) was thus at least one plus the length
+    // of the EOB plus what we have just sent of the empty static block.
+    if (1 + last_eob_len + 10 - bi_valid < 9) {
+      send_bits(STATIC_TREES<<1, 3);
+      send_code(END_BLOCK, StaticTree.static_ltree);
+      bi_flush();
+    }
+    last_eob_len = 7;
+  }
+
+
+  // Save the match info and tally the frequency counts. Return true if
+  // the current block must be flushed.
+  boolean _tr_tally (int dist, // distance of matched string
+		     int lc // match length-MIN_MATCH or unmatched char (if dist==0)
+		     ){
+
+    pending_buf[d_buf+last_lit*2] = (byte)(dist>>>8);
+    pending_buf[d_buf+last_lit*2+1] = (byte)dist;
+
+    pending_buf[l_buf+last_lit] = (byte)lc; last_lit++;
+
+    if (dist == 0) {
+      // lc is the unmatched char
+      dyn_ltree[lc*2]++;
+    } 
+    else {
+      matches++;
+      // Here, lc is the match length - MIN_MATCH
+      dist--;             // dist = match distance - 1
+      dyn_ltree[(Tree._length_code[lc]+LITERALS+1)*2]++;
+      dyn_dtree[Tree.d_code(dist)*2]++;
+    }
+
+    if ((last_lit & 0x1fff) == 0 && level > 2) {
+      // Compute an upper bound for the compressed length
+      int out_length = last_lit*8;
+      int in_length = strstart - block_start;
+      int dcode;
+      for (dcode = 0; dcode < D_CODES; dcode++) {
+	out_length += (int)dyn_dtree[dcode*2] *
+	  (5L+Tree.extra_dbits[dcode]);
+      }
+      out_length >>>= 3;
+      if ((matches < (last_lit/2)) && out_length < in_length/2) return true;
+    }
+
+    return (last_lit == lit_bufsize-1);
+    // We avoid equality with lit_bufsize because of wraparound at 64K
+    // on 16 bit machines and because stored blocks are restricted to
+    // 64K-1 bytes.
+  }
+
+  // Send the block data compressed using the given Huffman trees
+  void compress_block(short[] ltree, short[] dtree){
+    int  dist;      // distance of matched string
+    int lc;         // match length or unmatched char (if dist == 0)
+    int lx = 0;     // running index in l_buf
+    int code;       // the code to send
+    int extra;      // number of extra bits to send
+
+    if (last_lit != 0){
+      do{
+	dist=((pending_buf[d_buf+lx*2]<<8)&0xff00)|
+	  (pending_buf[d_buf+lx*2+1]&0xff);
+	lc=(pending_buf[l_buf+lx])&0xff; lx++;
+
+	if(dist == 0){
+	  send_code(lc, ltree); // send a literal byte
+	} 
+	else{
+	  // Here, lc is the match length - MIN_MATCH
+	  code = Tree._length_code[lc];
+
+	  send_code(code+LITERALS+1, ltree); // send the length code
+	  extra = Tree.extra_lbits[code];
+	  if(extra != 0){
+	    lc -= Tree.base_length[code];
+	    send_bits(lc, extra);       // send the extra length bits
+	  }
+	  dist--; // dist is now the match distance - 1
+	  code = Tree.d_code(dist);
+
+	  send_code(code, dtree);       // send the distance code
+	  extra = Tree.extra_dbits[code];
+	  if (extra != 0) {
+	    dist -= Tree.base_dist[code];
+	    send_bits(dist, extra);   // send the extra distance bits
+	  }
+	} // literal or match pair ?
+
+	// Check that the overlay between pending_buf and d_buf+l_buf is ok:
+      }
+      while (lx < last_lit);
+    }
+
+    send_code(END_BLOCK, ltree);
+    last_eob_len = ltree[END_BLOCK*2+1];
+  }
+
+  // Set the data type to ASCII or BINARY, using a crude approximation:
+  // binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise.
+  // IN assertion: the fields freq of dyn_ltree are set and the total of all
+  // frequencies does not exceed 64K (to fit in an int on 16 bit machines).
+  void set_data_type(){
+    int n = 0;
+    int  ascii_freq = 0;
+    int  bin_freq = 0;
+    while(n<7){ bin_freq += dyn_ltree[n*2]; n++;}
+    while(n<128){ ascii_freq += dyn_ltree[n*2]; n++;}
+    while(n (ascii_freq >>> 2) ? Z_BINARY : Z_ASCII);
+  }
+
+  // Flush the bit buffer, keeping at most 7 bits in it.
+  void bi_flush(){
+    if (bi_valid == 16) {
+      put_short(bi_buf);
+      bi_buf=0;
+      bi_valid=0;
+    }
+    else if (bi_valid >= 8) {
+      put_byte((byte)bi_buf);
+      bi_buf>>>=8;
+      bi_valid-=8;
+    }
+  }
+
+  // Flush the bit buffer and align the output on a byte boundary
+  void bi_windup(){
+    if (bi_valid > 8) {
+      put_short(bi_buf);
+    } else if (bi_valid > 0) {
+      put_byte((byte)bi_buf);
+    }
+    bi_buf = 0;
+    bi_valid = 0;
+  }
+
+  // Copy a stored block, storing first the length and its
+  // one's complement if requested.
+  void copy_block(int buf,         // the input data
+		  int len,         // its length
+		  boolean header   // true if block header must be written
+		  ){
+    int index=0;
+    bi_windup();      // align on byte boundary
+    last_eob_len = 8; // enough lookahead for inflate
+
+    if (header) {
+      put_short((short)len);   
+      put_short((short)~len);
+    }
+
+    //  while(len--!=0) {
+    //    put_byte(window[buf+index]);
+    //    index++;
+    //  }
+    put_byte(window, buf, len);
+  }
+
+  void flush_block_only(boolean eof){
+    _tr_flush_block(block_start>=0 ? block_start : -1,
+		    strstart-block_start,
+		    eof);
+    block_start=strstart;
+    strm.flush_pending();
+  }
+
+  // Copy without compression as much as possible from the input stream, return
+  // the current block state.
+  // This function does not insert new strings in the dictionary since
+  // uncompressible data is probably not useful. This function is used
+  // only for the level=0 compression option.
+  // NOTE: this function should be optimized to avoid extra copying from
+  // window to pending_buf.
+  int deflate_stored(int flush){
+    // Stored blocks are limited to 0xffff bytes, pending_buf is limited
+    // to pending_buf_size, and each stored block has a 5 byte header:
+
+    int max_block_size = 0xffff;
+    int max_start;
+
+    if(max_block_size > pending_buf_size - 5) {
+      max_block_size = pending_buf_size - 5;
+    }
+
+    // Copy as much as possible from input to output:
+    while(true){
+      // Fill the window as much as possible:
+      if(lookahead<=1){
+	fill_window();
+	if(lookahead==0 && flush==Z_NO_FLUSH) return NeedMore;
+	if(lookahead==0) break; // flush the current block
+      }
+
+      strstart+=lookahead;
+      lookahead=0;
+
+      // Emit a stored block if pending_buf will be full:
+      max_start=block_start+max_block_size;
+      if(strstart==0|| strstart>=max_start) {
+	// strstart == 0 is possible when wraparound on 16-bit machine
+	lookahead = (int)(strstart-max_start);
+	strstart = (int)max_start;
+      
+	flush_block_only(false);
+	if(strm.avail_out==0) return NeedMore;
+
+      }
+
+      // Flush if we may have to slide, otherwise block_start may become
+      // negative and the data will be gone:
+      if(strstart-block_start >= w_size-MIN_LOOKAHEAD) {
+	flush_block_only(false);
+	if(strm.avail_out==0) return NeedMore;
+      }
+    }
+
+    flush_block_only(flush == Z_FINISH);
+    if(strm.avail_out==0)
+      return (flush == Z_FINISH) ? FinishStarted : NeedMore;
+
+    return flush == Z_FINISH ? FinishDone : BlockDone;
+  }
+
+  // Send a stored block
+  void _tr_stored_block(int buf,        // input block
+			int stored_len, // length of input block
+			boolean eof     // true if this is the last block for a file
+			){
+    send_bits((STORED_BLOCK<<1)+(eof?1:0), 3);  // send block type
+    copy_block(buf, stored_len, true);          // with header
+  }
+
+  // Determine the best encoding for the current block: dynamic trees, static
+  // trees or store, and output the encoded block to the zip file.
+  void _tr_flush_block(int buf,        // input block, or NULL if too old
+		       int stored_len, // length of input block
+		       boolean eof     // true if this is the last block for a file
+		       ) {
+    int opt_lenb, static_lenb;// opt_len and static_len in bytes
+    int max_blindex = 0;      // index of last bit length code of non zero freq
+
+    // Build the Huffman trees unless a stored block is forced
+    if(level > 0) {
+      // Check if the file is ascii or binary
+      if(data_type == Z_UNKNOWN) set_data_type();
+
+      // Construct the literal and distance trees
+      l_desc.build_tree(this);
+
+      d_desc.build_tree(this);
+
+      // At this point, opt_len and static_len are the total bit lengths of
+      // the compressed block data, excluding the tree representations.
+
+      // Build the bit length tree for the above two trees, and get the index
+      // in bl_order of the last bit length code to send.
+      max_blindex=build_bl_tree();
+
+      // Determine the best encoding. Compute first the block length in bytes
+      opt_lenb=(opt_len+3+7)>>>3;
+      static_lenb=(static_len+3+7)>>>3;
+
+      if(static_lenb<=opt_lenb) opt_lenb=static_lenb;
+    }
+    else {
+      opt_lenb=static_lenb=stored_len+5; // force a stored block
+    }
+
+    if(stored_len+4<=opt_lenb && buf != -1){
+      // 4: two words for the lengths
+      // The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
+      // Otherwise we can't have processed more than WSIZE input bytes since
+      // the last block flush, because compression would have been
+      // successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
+      // transform a block into a stored block.
+      _tr_stored_block(buf, stored_len, eof);
+    }
+    else if(static_lenb == opt_lenb){
+      send_bits((STATIC_TREES<<1)+(eof?1:0), 3);
+      compress_block(StaticTree.static_ltree, StaticTree.static_dtree);
+    }
+    else{
+      send_bits((DYN_TREES<<1)+(eof?1:0), 3);
+      send_all_trees(l_desc.max_code+1, d_desc.max_code+1, max_blindex+1);
+      compress_block(dyn_ltree, dyn_dtree);
+    }
+
+    // The above check is made mod 2^32, for files larger than 512 MB
+    // and uLong implemented on 32 bits.
+
+    init_block();
+
+    if(eof){
+      bi_windup();
+    }
+  }
+
+  // Fill the window when the lookahead becomes insufficient.
+  // Updates strstart and lookahead.
+  //
+  // IN assertion: lookahead < MIN_LOOKAHEAD
+  // OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
+  //    At least one byte has been read, or avail_in == 0; reads are
+  //    performed for at least two bytes (required for the zip translate_eol
+  //    option -- not supported here).
+  void fill_window(){
+    int n, m;
+    int p;
+    int more;    // Amount of free space at the end of the window.
+
+    do{
+      more = (window_size-lookahead-strstart);
+
+      // Deal with !@#$% 64K limit:
+      if(more==0 && strstart==0 && lookahead==0){
+	more = w_size;
+      } 
+      else if(more==-1) {
+	// Very unlikely, but possible on 16 bit machine if strstart == 0
+	// and lookahead == 1 (input done one byte at time)
+	more--;
+
+	// If the window is almost full and there is insufficient lookahead,
+	// move the upper half to the lower one to make room in the upper half.
+      }
+      else if(strstart >= w_size+ w_size-MIN_LOOKAHEAD) {
+	System.arraycopy(window, w_size, window, 0, w_size);
+	match_start-=w_size;
+	strstart-=w_size; // we now have strstart >= MAX_DIST
+	block_start-=w_size;
+
+	// Slide the hash table (could be avoided with 32 bit values
+	// at the expense of memory usage). We slide even when level == 0
+	// to keep the hash table consistent if we switch back to level > 0
+	// later. (Using level 0 permanently is not an optimal usage of
+	// zlib, so we don't care about this pathological case.)
+
+	n = hash_size;
+	p=n;
+	do {
+	  m = (head[--p]&0xffff);
+	  head[p]=(m>=w_size ? (short)(m-w_size) : 0);
+	}
+	while (--n != 0);
+
+	n = w_size;
+	p = n;
+	do {
+	  m = (prev[--p]&0xffff);
+	  prev[p] = (m >= w_size ? (short)(m-w_size) : 0);
+	  // If n is not on any hash chain, prev[n] is garbage but
+	  // its value will never be used.
+	}
+	while (--n!=0);
+	more += w_size;
+      }
+
+      if (strm.avail_in == 0) return;
+
+      // If there was no sliding:
+      //    strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
+      //    more == window_size - lookahead - strstart
+      // => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
+      // => more >= window_size - 2*WSIZE + 2
+      // In the BIG_MEM or MMAP case (not yet supported),
+      //   window_size == input_size + MIN_LOOKAHEAD  &&
+      //   strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
+      // Otherwise, window_size == 2*WSIZE so more >= 2.
+      // If there was sliding, more >= WSIZE. So in all cases, more >= 2.
+
+      n = strm.read_buf(window, strstart + lookahead, more);
+      lookahead += n;
+
+      // Initialize the hash value now that we have some input:
+      if(lookahead >= MIN_MATCH) {
+	ins_h = window[strstart]&0xff;
+	ins_h=(((ins_h)<= MIN_MATCH){
+	ins_h=(((ins_h)<=MIN_MATCH){
+	//        check_match(strstart, match_start, match_length);
+
+	bflush=_tr_tally(strstart-match_start, match_length-MIN_MATCH);
+
+	lookahead -= match_length;
+
+	// Insert new strings in the hash table only if the match length
+	// is not too large. This saves time but degrades compression.
+	if(match_length <= max_lazy_match &&
+	   lookahead >= MIN_MATCH) {
+	  match_length--; // string at strstart already in hash table
+	  do{
+	    strstart++;
+
+	    ins_h=((ins_h<= MIN_MATCH) {
+	ins_h=(((ins_h)< 4096))) {
+
+	  // If prev_match is also MIN_MATCH, match_start is garbage
+	  // but we will ignore the current match anyway.
+	  match_length = MIN_MATCH-1;
+	}
+      }
+
+      // If there was a match at the previous step and the current
+      // match is not better, output the previous match:
+      if(prev_length >= MIN_MATCH && match_length <= prev_length) {
+	int max_insert = strstart + lookahead - MIN_MATCH;
+	// Do not insert strings in hash table beyond this.
+
+	//          check_match(strstart-1, prev_match, prev_length);
+
+	bflush=_tr_tally(strstart-1-prev_match, prev_length - MIN_MATCH);
+
+	// Insert in hash table all strings up to the end of the match.
+	// strstart-1 and strstart are already inserted. If there is not
+	// enough lookahead, the last two strings are not inserted in
+	// the hash table.
+	lookahead -= prev_length-1;
+	prev_length -= 2;
+	do{
+	  if(++strstart <= max_insert) {
+	    ins_h=(((ins_h)<(w_size-MIN_LOOKAHEAD) ?
+      strstart-(w_size-MIN_LOOKAHEAD) : 0;
+    int nice_match=this.nice_match;
+
+    // Stop when cur_match becomes <= limit. To simplify the code,
+    // we prevent matches with the string of window index 0.
+
+    int wmask = w_mask;
+
+    int strend = strstart + MAX_MATCH;
+    byte scan_end1 = window[scan+best_len-1];
+    byte scan_end = window[scan+best_len];
+
+    // The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+    // It is easy to get rid of this optimization if necessary.
+
+    // Do not waste too much time if we already have a good match:
+    if (prev_length >= good_match) {
+      chain_length >>= 2;
+    }
+
+    // Do not look for matches beyond the end of the input. This is necessary
+    // to make deflate deterministic.
+    if (nice_match > lookahead) nice_match = lookahead;
+
+    do {
+      match = cur_match;
+
+      // Skip to next match if the match length cannot increase
+      // or if the match length is less than 2:
+      if (window[match+best_len]   != scan_end  ||
+	  window[match+best_len-1] != scan_end1 ||
+	  window[match]       != window[scan]     ||
+	  window[++match]     != window[scan+1])      continue;
+
+      // The check at best_len-1 can be removed because it will be made
+      // again later. (This heuristic is not always a win.)
+      // It is not necessary to compare scan[2] and match[2] since they
+      // are always equal when the other bytes match, given that
+      // the hash keys are equal and that HASH_BITS >= 8.
+      scan += 2; match++;
+
+      // We check for insufficient lookahead only every 8th comparison;
+      // the 256th check will be made at strstart+258.
+      do {
+      } while (window[++scan] == window[++match] &&
+	       window[++scan] == window[++match] &&
+	       window[++scan] == window[++match] &&
+	       window[++scan] == window[++match] &&
+	       window[++scan] == window[++match] &&
+	       window[++scan] == window[++match] &&
+	       window[++scan] == window[++match] &&
+	       window[++scan] == window[++match] &&
+	       scan < strend);
+
+      len = MAX_MATCH - (int)(strend - scan);
+      scan = strend - MAX_MATCH;
+
+      if(len>best_len) {
+	match_start = cur_match;
+	best_len = len;
+	if (len >= nice_match) break;
+	scan_end1  = window[scan+best_len-1];
+	scan_end   = window[scan+best_len];
+      }
+
+    } while ((cur_match = (prev[cur_match & wmask]&0xffff)) > limit
+	     && --chain_length != 0);
+
+    if (best_len <= lookahead) return best_len;
+    return lookahead;
+  }
+    
+  int deflateInit(ZStream strm, int level, int bits){
+    return deflateInit2(strm, level, Z_DEFLATED, bits, DEF_MEM_LEVEL,
+			Z_DEFAULT_STRATEGY);
+  }
+  int deflateInit(ZStream strm, int level){
+    return deflateInit(strm, level, MAX_WBITS);
+  }
+  int deflateInit2(ZStream strm, int level, int method,  int windowBits,
+		   int memLevel, int strategy){
+    int noheader = 0;
+    //    byte[] my_version=ZLIB_VERSION;
+
+    //
+    //  if (version == null || version[0] != my_version[0]
+    //  || stream_size != sizeof(z_stream)) {
+    //  return Z_VERSION_ERROR;
+    //  }
+
+    strm.msg = null;
+
+    if (level == Z_DEFAULT_COMPRESSION) level = 6;
+
+    if (windowBits < 0) { // undocumented feature: suppress zlib header
+      noheader = 1;
+      windowBits = -windowBits;
+    }
+
+    if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || 
+	method != Z_DEFLATED ||
+	windowBits < 9 || windowBits > 15 || level < 0 || level > 9 ||
+        strategy < 0 || strategy > Z_HUFFMAN_ONLY) {
+      return Z_STREAM_ERROR;
+    }
+
+    strm.dstate = (Deflate)this;
+
+    this.noheader = noheader;
+    w_bits = windowBits;
+    w_size = 1 << w_bits;
+    w_mask = w_size - 1;
+
+    hash_bits = memLevel + 7;
+    hash_size = 1 << hash_bits;
+    hash_mask = hash_size - 1;
+    hash_shift = ((hash_bits+MIN_MATCH-1)/MIN_MATCH);
+
+    window = new byte[w_size*2];
+    prev = new short[w_size];
+    head = new short[hash_size];
+
+    lit_bufsize = 1 << (memLevel + 6); // 16K elements by default
+
+    // We overlay pending_buf and d_buf+l_buf. This works since the average
+    // output size for (length,distance) codes is <= 24 bits.
+    pending_buf = new byte[lit_bufsize*4];
+    pending_buf_size = lit_bufsize*4;
+
+    d_buf = lit_bufsize/2;
+    l_buf = (1+2)*lit_bufsize;
+
+    this.level = level;
+
+//System.out.println("level="+level);
+
+    this.strategy = strategy;
+    this.method = (byte)method;
+
+    return deflateReset(strm);
+  }
+
+  int deflateReset(ZStream strm){
+    strm.total_in = strm.total_out = 0;
+    strm.msg = null; //
+    strm.data_type = Z_UNKNOWN;
+
+    pending = 0;
+    pending_out = 0;
+
+    if(noheader < 0) {
+      noheader = 0; // was set to -1 by deflate(..., Z_FINISH);
+    }
+    status = (noheader!=0) ? BUSY_STATE : INIT_STATE;
+    strm.adler=strm._adler.adler32(0, null, 0, 0);
+
+    last_flush = Z_NO_FLUSH;
+
+    tr_init();
+    lm_init();
+    return Z_OK;
+  }
+
+  int deflateEnd(){
+    if(status!=INIT_STATE && status!=BUSY_STATE && status!=FINISH_STATE){
+      return Z_STREAM_ERROR;
+    }
+    // Deallocate in reverse order of allocations:
+    pending_buf=null;
+    head=null;
+    prev=null;
+    window=null;
+    // free
+    // dstate=null;
+    return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;
+  }
+
+  int deflateParams(ZStream strm, int _level, int _strategy){
+    int err=Z_OK;
+
+    if(_level == Z_DEFAULT_COMPRESSION){
+      _level = 6;
+    }
+    if(_level < 0 || _level > 9 || 
+       _strategy < 0 || _strategy > Z_HUFFMAN_ONLY) {
+      return Z_STREAM_ERROR;
+    }
+
+    if(config_table[level].func!=config_table[_level].func &&
+       strm.total_in != 0) {
+      // Flush the last buffer:
+      err = strm.deflate(Z_PARTIAL_FLUSH);
+    }
+
+    if(level != _level) {
+      level = _level;
+      max_lazy_match   = config_table[level].max_lazy;
+      good_match       = config_table[level].good_length;
+      nice_match       = config_table[level].nice_length;
+      max_chain_length = config_table[level].max_chain;
+    }
+    strategy = _strategy;
+    return err;
+  }
+
+  int deflateSetDictionary (ZStream strm, byte[] dictionary, int dictLength){
+    int length = dictLength;
+    int index=0;
+
+    if(dictionary == null || status != INIT_STATE)
+      return Z_STREAM_ERROR;
+
+    strm.adler=strm._adler.adler32(strm.adler, dictionary, 0, dictLength);
+
+    if(length < MIN_MATCH) return Z_OK;
+    if(length > w_size-MIN_LOOKAHEAD){
+      length = w_size-MIN_LOOKAHEAD;
+      index=dictLength-length; // use the tail of the dictionary
+    }
+    System.arraycopy(dictionary, index, window, 0, length);
+    strstart = length;
+    block_start = length;
+
+    // Insert all strings in the hash table (except for the last two bytes).
+    // s->lookahead stays null, so s->ins_h will be recomputed at the next
+    // call of fill_window.
+
+    ins_h = window[0]&0xff;
+    ins_h=(((ins_h)<Z_FINISH || flush<0){
+      return Z_STREAM_ERROR;
+    }
+
+    if(strm.next_out == null ||
+       (strm.next_in == null && strm.avail_in != 0) ||
+       (status == FINISH_STATE && flush != Z_FINISH)) {
+      strm.msg=z_errmsg[Z_NEED_DICT-(Z_STREAM_ERROR)];
+      return Z_STREAM_ERROR;
+    }
+    if(strm.avail_out == 0){
+      strm.msg=z_errmsg[Z_NEED_DICT-(Z_BUF_ERROR)];
+      return Z_BUF_ERROR;
+    }
+
+    this.strm = strm; // just in case
+    old_flush = last_flush;
+    last_flush = flush;
+
+    // Write the zlib header
+    if(status == INIT_STATE) {
+      int header = (Z_DEFLATED+((w_bits-8)<<4))<<8;
+      int level_flags=((level-1)&0xff)>>1;
+
+      if(level_flags>3) level_flags=3;
+      header |= (level_flags<<6);
+      if(strstart!=0) header |= PRESET_DICT;
+      header+=31-(header % 31);
+
+      status=BUSY_STATE;
+      putShortMSB(header);
+
+
+      // Save the adler32 of the preset dictionary:
+      if(strstart!=0){
+        putShortMSB((int)(strm.adler>>>16));
+        putShortMSB((int)(strm.adler&0xffff));
+      }
+      strm.adler=strm._adler.adler32(0, null, 0, 0);
+    }
+
+    // Flush as much pending output as possible
+    if(pending != 0) {
+      strm.flush_pending();
+      if(strm.avail_out == 0) {
+	//System.out.println("  avail_out==0");
+	// Since avail_out is 0, deflate will be called again with
+	// more output space, but possibly with both pending and
+	// avail_in equal to zero. There won't be anything to do,
+	// but this is not an error situation so make sure we
+	// return OK instead of BUF_ERROR at next call of deflate:
+	last_flush = -1;
+	return Z_OK;
+      }
+
+      // Make sure there is something to do and avoid duplicate consecutive
+      // flushes. For repeated and useless calls with Z_FINISH, we keep
+      // returning Z_STREAM_END instead of Z_BUFF_ERROR.
+    }
+    else if(strm.avail_in==0 && flush <= old_flush &&
+	    flush != Z_FINISH) {
+      strm.msg=z_errmsg[Z_NEED_DICT-(Z_BUF_ERROR)];
+      return Z_BUF_ERROR;
+    }
+
+    // User must not provide more input after the first FINISH:
+    if(status == FINISH_STATE && strm.avail_in != 0) {
+      strm.msg=z_errmsg[Z_NEED_DICT-(Z_BUF_ERROR)];
+      return Z_BUF_ERROR;
+    }
+
+    // Start a new block or continue the current one.
+    if(strm.avail_in!=0 || lookahead!=0 ||
+       (flush != Z_NO_FLUSH && status != FINISH_STATE)) {
+      int bstate=-1;
+      switch(config_table[level].func){
+      case STORED: 
+	bstate = deflate_stored(flush);
+	break;
+      case FAST: 
+	bstate = deflate_fast(flush);
+	break;
+      case SLOW: 
+	bstate = deflate_slow(flush);
+	break;
+      default:
+      }
+
+      if (bstate==FinishStarted || bstate==FinishDone) {
+	status = FINISH_STATE;
+      }
+      if (bstate==NeedMore || bstate==FinishStarted) {
+	if(strm.avail_out == 0) {
+	  last_flush = -1; // avoid BUF_ERROR next call, see above
+	}
+	return Z_OK;
+	// If flush != Z_NO_FLUSH && avail_out == 0, the next call
+	// of deflate should use the same flush parameter to make sure
+	// that the flush is complete. So we don't have to output an
+	// empty block here, this will be done at next call. This also
+	// ensures that for a very small output buffer, we emit at most
+	// one empty block.
+      }
+
+      if (bstate==BlockDone) {
+	if(flush == Z_PARTIAL_FLUSH) {
+	  _tr_align();
+	} 
+	else { // FULL_FLUSH or SYNC_FLUSH
+	  _tr_stored_block(0, 0, false);
+	  // For a full flush, this empty block will be recognized
+	  // as a special marker by inflate_sync().
+	  if(flush == Z_FULL_FLUSH) {
+	    //state.head[s.hash_size-1]=0;
+	    for(int i=0; i>>16));
+    putShortMSB((int)(strm.adler&0xffff));
+    strm.flush_pending();
+
+    // If avail_out is zero, the application will call deflate again
+    // to flush the rest.
+    noheader = -1; // write the trailer only once!
+    return pending != 0 ? Z_OK : Z_STREAM_END;
+  }
+}
diff --git a/src/com/jcraft/jzlib/InfBlocks.java b/src/com/jcraft/jzlib/InfBlocks.java
new file mode 100644
index 000000000..f6997fc6b
--- /dev/null
+++ b/src/com/jcraft/jzlib/InfBlocks.java
@@ -0,0 +1,614 @@
+/* -*-mode:java; c-basic-offset:2; -*- */
+/*
+Copyright (c) 2000,2001,2002,2003 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 com.jcraft.jzlib;
+
+final class InfBlocks{
+  static final private int MANY=1440;
+
+  // And'ing with mask[n] masks the lower n bits
+  static final private int[] inflate_mask = {
+    0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000f,
+    0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff, 0x000001ff,
+    0x000003ff, 0x000007ff, 0x00000fff, 0x00001fff, 0x00003fff,
+    0x00007fff, 0x0000ffff
+  };
+
+  // Table for deflate from PKZIP's appnote.txt.
+  static final int[] border = { // Order of the bit length code lengths
+    16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
+  };
+
+  static final private int Z_OK=0;
+  static final private int Z_STREAM_END=1;
+  static final private int Z_NEED_DICT=2;
+  static final private int Z_ERRNO=-1;
+  static final private int Z_STREAM_ERROR=-2;
+  static final private int Z_DATA_ERROR=-3;
+  static final private int Z_MEM_ERROR=-4;
+  static final private int Z_BUF_ERROR=-5;
+  static final private int Z_VERSION_ERROR=-6;
+
+  static final private int TYPE=0;  // get type bits (3, including end bit)
+  static final private int LENS=1;  // get lengths for stored
+  static final private int STORED=2;// processing stored block
+  static final private int TABLE=3; // get table lengths
+  static final private int BTREE=4; // get bit lengths tree for a dynamic block
+  static final private int DTREE=5; // get length, distance trees for a dynamic block
+  static final private int CODES=6; // processing fixed or dynamic block
+  static final private int DRY=7;   // output remaining window bytes
+  static final private int DONE=8;  // finished last block, done
+  static final private int BAD=9;   // ot a data error--stuck here
+
+  int mode;            // current inflate_block mode 
+
+  int left;            // if STORED, bytes left to copy 
+
+  int table;           // table lengths (14 bits) 
+  int index;           // index into blens (or border) 
+  int[] blens;         // bit lengths of codes 
+  int[] bb=new int[1]; // bit length tree depth 
+  int[] tb=new int[1]; // bit length decoding tree 
+
+  InfCodes codes=new InfCodes();      // if CODES, current state 
+
+  int last;            // true if this block is the last block 
+
+  // mode independent information 
+  int bitk;            // bits in bit buffer 
+  int bitb;            // bit buffer 
+  int[] hufts;         // single malloc for tree space 
+  byte[] window;       // sliding window 
+  int end;             // one byte after sliding window 
+  int read;            // window read pointer 
+  int write;           // window write pointer 
+  Object checkfn;      // check function 
+  long check;          // check on output 
+
+  InfTree inftree=new InfTree();
+
+  InfBlocks(ZStream z, Object checkfn, int w){
+    hufts=new int[MANY*3];
+    window=new byte[w];
+    end=w;
+    this.checkfn = checkfn;
+    mode = TYPE;
+    reset(z, null);
+  }
+
+  void reset(ZStream z, long[] c){
+    if(c!=null) c[0]=check;
+    if(mode==BTREE || mode==DTREE){
+    }
+    if(mode==CODES){
+      codes.free(z);
+    }
+    mode=TYPE;
+    bitk=0;
+    bitb=0;
+    read=write=0;
+
+    if(checkfn != null)
+      z.adler=check=z._adler.adler32(0L, null, 0, 0);
+  }
+
+  int proc(ZStream z, int r){
+    int t;              // temporary storage
+    int b;              // bit buffer
+    int k;              // bits in bit buffer
+    int p;              // input data pointer
+    int n;              // bytes available there
+    int q;              // output window write pointer
+    int m;              // bytes to end of window or read pointer
+
+    // copy input/output information to locals (UPDATE macro restores)
+    {p=z.next_in_index;n=z.avail_in;b=bitb;k=bitk;}
+    {q=write;m=(int)(q>> 1){
+        case 0:                         // stored 
+          {b>>>=(3);k-=(3);}
+          t = k & 7;                    // go to byte boundary
+
+          {b>>>=(t);k-=(t);}
+          mode = LENS;                  // get length of stored block
+          break;
+        case 1:                         // fixed
+          {
+            int[] bl=new int[1];
+	    int[] bd=new int[1];
+            int[][] tl=new int[1][];
+	    int[][] td=new int[1][];
+
+	    InfTree.inflate_trees_fixed(bl, bd, tl, td, z);
+            codes.init(bl[0], bd[0], tl[0], 0, td[0], 0, z);
+          }
+
+          {b>>>=(3);k-=(3);}
+
+          mode = CODES;
+          break;
+        case 2:                         // dynamic
+
+          {b>>>=(3);k-=(3);}
+
+          mode = TABLE;
+          break;
+        case 3:                         // illegal
+
+          {b>>>=(3);k-=(3);}
+          mode = BAD;
+          z.msg = "invalid block type";
+          r = Z_DATA_ERROR;
+
+	  bitb=b; bitk=k; 
+	  z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	  write=q;
+	  return inflate_flush(z,r);
+	}
+	break;
+      case LENS:
+
+	while(k<(32)){
+	  if(n!=0){
+	    r=Z_OK;
+	  }
+	  else{
+	    bitb=b; bitk=k; 
+	    z.avail_in=n;
+	    z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	    write=q;
+	    return inflate_flush(z,r);
+	  };
+	  n--;
+	  b|=(z.next_in[p++]&0xff)<>> 16) & 0xffff) != (b & 0xffff)){
+	  mode = BAD;
+	  z.msg = "invalid stored block lengths";
+	  r = Z_DATA_ERROR;
+
+	  bitb=b; bitk=k; 
+	  z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	  write=q;
+	  return inflate_flush(z,r);
+	}
+	left = (b & 0xffff);
+	b = k = 0;                       // dump bits
+	mode = left!=0 ? STORED : (last!=0 ? DRY : TYPE);
+	break;
+      case STORED:
+	if (n == 0){
+	  bitb=b; bitk=k; 
+	  z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	  write=q;
+	  return inflate_flush(z,r);
+	}
+
+	if(m==0){
+	  if(q==end&&read!=0){
+	    q=0; m=(int)(qn) t = n;
+	if(t>m) t = m;
+	System.arraycopy(z.next_in, p, window, q, t);
+	p += t;  n -= t;
+	q += t;  m -= t;
+	if ((left -= t) != 0)
+	  break;
+	mode = last!=0 ? DRY : TYPE;
+	break;
+      case TABLE:
+
+	while(k<(14)){
+	  if(n!=0){
+	    r=Z_OK;
+	  }
+	  else{
+	    bitb=b; bitk=k; 
+	    z.avail_in=n;
+	    z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	    write=q;
+	    return inflate_flush(z,r);
+	  };
+	  n--;
+	  b|=(z.next_in[p++]&0xff)< 29 || ((t >> 5) & 0x1f) > 29)
+	  {
+	    mode = BAD;
+	    z.msg = "too many length or distance symbols";
+	    r = Z_DATA_ERROR;
+
+	    bitb=b; bitk=k; 
+	    z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	    write=q;
+	    return inflate_flush(z,r);
+	  }
+	t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
+	if(blens==null || blens.length>>=(14);k-=(14);}
+
+	index = 0;
+	mode = BTREE;
+      case BTREE:
+	while (index < 4 + (table >>> 10)){
+	  while(k<(3)){
+	    if(n!=0){
+	      r=Z_OK;
+	    }
+	    else{
+	      bitb=b; bitk=k; 
+	      z.avail_in=n;
+	      z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	      write=q;
+	      return inflate_flush(z,r);
+	    };
+	    n--;
+	    b|=(z.next_in[p++]&0xff)<>>=(3);k-=(3);}
+	}
+
+	while(index < 19){
+	  blens[border[index++]] = 0;
+	}
+
+	bb[0] = 7;
+	t = inftree.inflate_trees_bits(blens, bb, tb, hufts, z);
+	if (t != Z_OK){
+	  r = t;
+	  if (r == Z_DATA_ERROR){
+	    blens=null;
+	    mode = BAD;
+	  }
+
+	  bitb=b; bitk=k; 
+	  z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	  write=q;
+	  return inflate_flush(z,r);
+	}
+
+	index = 0;
+	mode = DTREE;
+      case DTREE:
+	while (true){
+	  t = table;
+	  if(!(index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))){
+	    break;
+	  }
+
+	  int[] h;
+	  int i, j, c;
+
+	  t = bb[0];
+
+	  while(k<(t)){
+	    if(n!=0){
+	      r=Z_OK;
+	    }
+	    else{
+	      bitb=b; bitk=k; 
+	      z.avail_in=n;
+	      z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	      write=q;
+	      return inflate_flush(z,r);
+	    };
+	    n--;
+	    b|=(z.next_in[p++]&0xff)<>>=(t);k-=(t);
+	    blens[index++] = c;
+	  }
+	  else { // c == 16..18
+	    i = c == 18 ? 7 : c - 14;
+	    j = c == 18 ? 11 : 3;
+
+	    while(k<(t+i)){
+	      if(n!=0){
+		r=Z_OK;
+	      }
+	      else{
+		bitb=b; bitk=k; 
+		z.avail_in=n;
+		z.total_in+=p-z.next_in_index;z.next_in_index=p;
+		write=q;
+		return inflate_flush(z,r);
+	      };
+	      n--;
+	      b|=(z.next_in[p++]&0xff)<>>=(t);k-=(t);
+
+	    j += (b & inflate_mask[i]);
+
+	    b>>>=(i);k-=(i);
+
+	    i = index;
+	    t = table;
+	    if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
+		(c == 16 && i < 1)){
+	      blens=null;
+	      mode = BAD;
+	      z.msg = "invalid bit length repeat";
+	      r = Z_DATA_ERROR;
+
+	      bitb=b; bitk=k; 
+	      z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	      write=q;
+	      return inflate_flush(z,r);
+	    }
+
+	    c = c == 16 ? blens[i-1] : 0;
+	    do{
+	      blens[i++] = c;
+	    }
+	    while (--j!=0);
+	    index = i;
+	  }
+	}
+
+	tb[0]=-1;
+	{
+	  int[] bl=new int[1];
+	  int[] bd=new int[1];
+	  int[] tl=new int[1];
+	  int[] td=new int[1];
+	  bl[0] = 9;         // must be <= 9 for lookahead assumptions
+	  bd[0] = 6;         // must be <= 9 for lookahead assumptions
+
+	  t = table;
+	  t = inftree.inflate_trees_dynamic(257 + (t & 0x1f), 
+					    1 + ((t >> 5) & 0x1f),
+					    blens, bl, bd, tl, td, hufts, z);
+
+	  if (t != Z_OK){
+	    if (t == Z_DATA_ERROR){
+	      blens=null;
+	      mode = BAD;
+	    }
+	    r = t;
+
+	    bitb=b; bitk=k; 
+	    z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	    write=q;
+	    return inflate_flush(z,r);
+	  }
+	  codes.init(bl[0], bd[0], hufts, tl[0], hufts, td[0], z);
+	}
+	mode = CODES;
+      case CODES:
+	bitb=b; bitk=k;
+	z.avail_in=n; z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	write=q;
+
+	if ((r = codes.proc(this, z, r)) != Z_STREAM_END){
+	  return inflate_flush(z, r);
+	}
+	r = Z_OK;
+	codes.free(z);
+
+	p=z.next_in_index; n=z.avail_in;b=bitb;k=bitk;
+	q=write;m=(int)(q z.avail_out) n = z.avail_out;
+    if (n!=0 && r == Z_BUF_ERROR) r = Z_OK;
+
+    // update counters
+    z.avail_out -= n;
+    z.total_out += n;
+
+    // update check information
+    if(checkfn != null)
+      z.adler=check=z._adler.adler32(check, window, q, n);
+
+    // copy as far as end of window
+    System.arraycopy(window, q, z.next_out, p, n);
+    p += n;
+    q += n;
+
+    // see if more to copy at beginning of window
+    if (q == end){
+      // wrap pointers
+      q = 0;
+      if (write == end)
+        write = 0;
+
+      // compute bytes to copy
+      n = write - q;
+      if (n > z.avail_out) n = z.avail_out;
+      if (n!=0 && r == Z_BUF_ERROR) r = Z_OK;
+
+      // update counters
+      z.avail_out -= n;
+      z.total_out += n;
+
+      // update check information
+      if(checkfn != null)
+	z.adler=check=z._adler.adler32(check, window, q, n);
+
+      // copy
+      System.arraycopy(window, q, z.next_out, p, n);
+      p += n;
+      q += n;
+    }
+
+    // update pointers
+    z.next_out_index = p;
+    read = q;
+
+    // done
+    return r;
+  }
+}
diff --git a/src/com/jcraft/jzlib/InfCodes.java b/src/com/jcraft/jzlib/InfCodes.java
new file mode 100644
index 000000000..c768fb1cb
--- /dev/null
+++ b/src/com/jcraft/jzlib/InfCodes.java
@@ -0,0 +1,605 @@
+/* -*-mode:java; c-basic-offset:2; -*- */
+/*
+Copyright (c) 2000,2001,2002,2003 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 com.jcraft.jzlib;
+
+final class InfCodes{
+
+  static final private int[] inflate_mask = {
+    0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000f,
+    0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff, 0x000001ff,
+    0x000003ff, 0x000007ff, 0x00000fff, 0x00001fff, 0x00003fff,
+    0x00007fff, 0x0000ffff
+  };
+
+  static final private int Z_OK=0;
+  static final private int Z_STREAM_END=1;
+  static final private int Z_NEED_DICT=2;
+  static final private int Z_ERRNO=-1;
+  static final private int Z_STREAM_ERROR=-2;
+  static final private int Z_DATA_ERROR=-3;
+  static final private int Z_MEM_ERROR=-4;
+  static final private int Z_BUF_ERROR=-5;
+  static final private int Z_VERSION_ERROR=-6;
+
+  // waiting for "i:"=input,
+  //             "o:"=output,
+  //             "x:"=nothing
+  static final private int START=0;  // x: set up for LEN
+  static final private int LEN=1;    // i: get length/literal/eob next
+  static final private int LENEXT=2; // i: getting length extra (have base)
+  static final private int DIST=3;   // i: get distance next
+  static final private int DISTEXT=4;// i: getting distance extra
+  static final private int COPY=5;   // o: copying bytes in window, waiting for space
+  static final private int LIT=6;    // o: got literal, waiting for output space
+  static final private int WASH=7;   // o: got eob, possibly still output waiting
+  static final private int END=8;    // x: got eob and all data flushed
+  static final private int BADCODE=9;// x: got error
+
+  int mode;      // current inflate_codes mode
+
+  // mode dependent information
+  int len;
+
+  int[] tree; // pointer into tree
+  int tree_index=0;
+  int need;   // bits needed
+
+  int lit;
+
+  // if EXT or COPY, where and how much
+  int get;              // bits to get for extra
+  int dist;             // distance back to copy from
+
+  byte lbits;           // ltree bits decoded per branch
+  byte dbits;           // dtree bits decoder per branch
+  int[] ltree;          // literal/length/eob tree
+  int ltree_index;      // literal/length/eob tree
+  int[] dtree;          // distance tree
+  int dtree_index;      // distance tree
+
+  InfCodes(){
+  }
+  void init(int bl, int bd,
+	   int[] tl, int tl_index,
+	   int[] td, int td_index, ZStream z){
+    mode=START;
+    lbits=(byte)bl;
+    dbits=(byte)bd;
+    ltree=tl;
+    ltree_index=tl_index;
+    dtree = td;
+    dtree_index=td_index;
+    tree=null;
+  }
+
+  int proc(InfBlocks s, ZStream z, int r){ 
+    int j;              // temporary storage
+    int[] t;            // temporary pointer
+    int tindex;         // temporary pointer
+    int e;              // extra bits or operation
+    int b=0;            // bit buffer
+    int k=0;            // bits in bit buffer
+    int p=0;            // input data pointer
+    int n;              // bytes available there
+    int q;              // output window write pointer
+    int m;              // bytes to end of window or read pointer
+    int f;              // pointer to copy strings from
+
+    // copy input/output information to locals (UPDATE macro restores)
+    p=z.next_in_index;n=z.avail_in;b=s.bitb;k=s.bitk;
+    q=s.write;m=q= 258 && n >= 10){
+
+	  s.bitb=b;s.bitk=k;
+	  z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	  s.write=q;
+	  r = inflate_fast(lbits, dbits, 
+			   ltree, ltree_index, 
+			   dtree, dtree_index,
+			   s, z);
+
+	  p=z.next_in_index;n=z.avail_in;b=s.bitb;k=s.bitk;
+	  q=s.write;m=q>>=(tree[tindex+1]);
+	k-=(tree[tindex+1]);
+
+	e=tree[tindex];
+
+	if(e == 0){               // literal
+	  lit = tree[tindex+2];
+	  mode = LIT;
+	  break;
+	}
+	if((e & 16)!=0 ){          // length
+	  get = e & 15;
+	  len = tree[tindex+2];
+	  mode = LENEXT;
+	  break;
+	}
+	if ((e & 64) == 0){        // next table
+	  need = e;
+	  tree_index = tindex/3+tree[tindex+2];
+	  break;
+	}
+	if ((e & 32)!=0){               // end of block
+	  mode = WASH;
+	  break;
+	}
+	mode = BADCODE;        // invalid code
+	z.msg = "invalid literal/length code";
+	r = Z_DATA_ERROR;
+
+	s.bitb=b;s.bitk=k;
+	z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	s.write=q;
+	return s.inflate_flush(z,r);
+
+      case LENEXT:        // i: getting length extra (have base)
+	j = get;
+
+	while(k<(j)){
+	  if(n!=0)r=Z_OK;
+	  else{
+
+	    s.bitb=b;s.bitk=k;
+	    z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	    s.write=q;
+	    return s.inflate_flush(z,r);
+	  }
+	  n--; b|=(z.next_in[p++]&0xff)<>=j;
+	k-=j;
+
+	need = dbits;
+	tree = dtree;
+	tree_index=dtree_index;
+	mode = DIST;
+      case DIST:          // i: get distance next
+	j = need;
+
+	while(k<(j)){
+	  if(n!=0)r=Z_OK;
+	  else{
+
+	    s.bitb=b;s.bitk=k;
+	    z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	    s.write=q;
+	    return s.inflate_flush(z,r);
+	  }
+	  n--; b|=(z.next_in[p++]&0xff)<>=tree[tindex+1];
+	k-=tree[tindex+1];
+
+	e = (tree[tindex]);
+	if((e & 16)!=0){               // distance
+	  get = e & 15;
+	  dist = tree[tindex+2];
+	  mode = DISTEXT;
+	  break;
+	}
+	if ((e & 64) == 0){        // next table
+	  need = e;
+	  tree_index = tindex/3 + tree[tindex+2];
+	  break;
+	}
+	mode = BADCODE;        // invalid code
+	z.msg = "invalid distance code";
+	r = Z_DATA_ERROR;
+
+	s.bitb=b;s.bitk=k;
+	z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	s.write=q;
+	return s.inflate_flush(z,r);
+
+      case DISTEXT:       // i: getting distance extra
+	j = get;
+
+	while(k<(j)){
+	  if(n!=0)r=Z_OK;
+	  else{
+
+	    s.bitb=b;s.bitk=k;
+	    z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	    s.write=q;
+	    return s.inflate_flush(z,r);
+	  }
+	  n--; b|=(z.next_in[p++]&0xff)<>=j;
+	k-=j;
+
+	mode = COPY;
+      case COPY:          // o: copying bytes in window, waiting for space
+        f = q - dist;
+        while(f < 0){     // modulo window size-"while" instead
+          f += s.end;     // of "if" handles invalid distances
+	}
+	while (len!=0){
+
+	  if(m==0){
+	    if(q==s.end&&s.read!=0){q=0;m=q 7){        // return unused byte, if any
+	  k -= 8;
+	  n++;
+	  p--;             // can always return one
+	}
+
+	s.write=q; r=s.inflate_flush(z,r);
+	q=s.write;m=q= 258 && n >= 10
+      // get literal/length code
+      while(k<(20)){              // max bits for literal/length code
+	n--;
+	b|=(z.next_in[p++]&0xff)<>=(tp[tp_index_t_3+1]); k-=(tp[tp_index_t_3+1]);
+
+	s.window[q++] = (byte)tp[tp_index_t_3+2];
+	m--;
+	continue;
+      }
+      do {
+
+	b>>=(tp[tp_index_t_3+1]); k-=(tp[tp_index_t_3+1]);
+
+	if((e&16)!=0){
+	  e &= 15;
+	  c = tp[tp_index_t_3+2] + ((int)b & inflate_mask[e]);
+
+	  b>>=e; k-=e;
+
+	  // decode distance base of block to copy
+	  while(k<(15)){           // max bits for distance code
+	    n--;
+	    b|=(z.next_in[p++]&0xff)<>=(tp[tp_index_t_3+1]); k-=(tp[tp_index_t_3+1]);
+
+	    if((e&16)!=0){
+	      // get extra bits to add to distance base
+	      e &= 15;
+	      while(k<(e)){         // get extra bits (up to 13)
+		n--;
+		b|=(z.next_in[p++]&0xff)<>=(e); k-=(e);
+
+	      // do the copy
+	      m -= c;
+	      if (q >= d){                // offset before dest
+		//  just copy
+		r=q-d;
+		if(q-r>0 && 2>(q-r)){           
+		  s.window[q++]=s.window[r++]; // minimum count is three,
+		  s.window[q++]=s.window[r++]; // so unroll loop a little
+		  c-=2;
+		}
+		else{
+		  System.arraycopy(s.window, r, s.window, q, 2);
+		  q+=2; r+=2; c-=2;
+		}
+	      }
+	      else{                  // else offset after destination
+                r=q-d;
+                do{
+                  r+=s.end;          // force pointer in window
+                }while(r<0);         // covers invalid distances
+		e=s.end-r;
+		if(c>e){             // if source crosses,
+		  c-=e;              // wrapped copy
+		  if(q-r>0 && e>(q-r)){           
+		    do{s.window[q++] = s.window[r++];}
+		    while(--e!=0);
+		  }
+		  else{
+		    System.arraycopy(s.window, r, s.window, q, e);
+		    q+=e; r+=e; e=0;
+		  }
+		  r = 0;                  // copy rest from start of window
+		}
+
+	      }
+
+	      // copy all or what's left
+	      if(q-r>0 && c>(q-r)){           
+		do{s.window[q++] = s.window[r++];}
+		while(--c!=0);
+	      }
+	      else{
+		System.arraycopy(s.window, r, s.window, q, c);
+		q+=c; r+=c; c=0;
+	      }
+	      break;
+	    }
+	    else if((e&64)==0){
+	      t+=tp[tp_index_t_3+2];
+	      t+=(b&inflate_mask[e]);
+	      tp_index_t_3=(tp_index+t)*3;
+	      e=tp[tp_index_t_3];
+	    }
+	    else{
+	      z.msg = "invalid distance code";
+
+	      c=z.avail_in-n;c=(k>>3)>3:c;n+=c;p-=c;k-=c<<3;
+
+	      s.bitb=b;s.bitk=k;
+	      z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	      s.write=q;
+
+	      return Z_DATA_ERROR;
+	    }
+	  }
+	  while(true);
+	  break;
+	}
+
+	if((e&64)==0){
+	  t+=tp[tp_index_t_3+2];
+	  t+=(b&inflate_mask[e]);
+	  tp_index_t_3=(tp_index+t)*3;
+	  if((e=tp[tp_index_t_3])==0){
+
+	    b>>=(tp[tp_index_t_3+1]); k-=(tp[tp_index_t_3+1]);
+
+	    s.window[q++]=(byte)tp[tp_index_t_3+2];
+	    m--;
+	    break;
+	  }
+	}
+	else if((e&32)!=0){
+
+	  c=z.avail_in-n;c=(k>>3)>3:c;n+=c;p-=c;k-=c<<3;
+ 
+	  s.bitb=b;s.bitk=k;
+	  z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	  s.write=q;
+
+	  return Z_STREAM_END;
+	}
+	else{
+	  z.msg="invalid literal/length code";
+
+	  c=z.avail_in-n;c=(k>>3)>3:c;n+=c;p-=c;k-=c<<3;
+
+	  s.bitb=b;s.bitk=k;
+	  z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+	  s.write=q;
+
+	  return Z_DATA_ERROR;
+	}
+      } 
+      while(true);
+    } 
+    while(m>=258 && n>= 10);
+
+    // not enough input or output--restore pointers and return
+    c=z.avail_in-n;c=(k>>3)>3:c;n+=c;p-=c;k-=c<<3;
+
+    s.bitb=b;s.bitk=k;
+    z.avail_in=n;z.total_in+=p-z.next_in_index;z.next_in_index=p;
+    s.write=q;
+
+    return Z_OK;
+  }
+}
diff --git a/src/com/jcraft/jzlib/InfTree.java b/src/com/jcraft/jzlib/InfTree.java
new file mode 100644
index 000000000..cbca43667
--- /dev/null
+++ b/src/com/jcraft/jzlib/InfTree.java
@@ -0,0 +1,520 @@
+/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
+/*
+Copyright (c) 2000,2001,2002,2003 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 com.jcraft.jzlib;
+
+final class InfTree{
+
+  static final private int MANY=1440;
+
+  static final private int Z_OK=0;
+  static final private int Z_STREAM_END=1;
+  static final private int Z_NEED_DICT=2;
+  static final private int Z_ERRNO=-1;
+  static final private int Z_STREAM_ERROR=-2;
+  static final private int Z_DATA_ERROR=-3;
+  static final private int Z_MEM_ERROR=-4;
+  static final private int Z_BUF_ERROR=-5;
+  static final private int Z_VERSION_ERROR=-6;
+
+  static final int fixed_bl = 9;
+  static final int fixed_bd = 5;
+
+  static final int[] fixed_tl = {
+    96,7,256, 0,8,80, 0,8,16, 84,8,115,
+    82,7,31, 0,8,112, 0,8,48, 0,9,192,
+    80,7,10, 0,8,96, 0,8,32, 0,9,160,
+    0,8,0, 0,8,128, 0,8,64, 0,9,224,
+    80,7,6, 0,8,88, 0,8,24, 0,9,144,
+    83,7,59, 0,8,120, 0,8,56, 0,9,208,
+    81,7,17, 0,8,104, 0,8,40, 0,9,176,
+    0,8,8, 0,8,136, 0,8,72, 0,9,240,
+    80,7,4, 0,8,84, 0,8,20, 85,8,227,
+    83,7,43, 0,8,116, 0,8,52, 0,9,200,
+    81,7,13, 0,8,100, 0,8,36, 0,9,168,
+    0,8,4, 0,8,132, 0,8,68, 0,9,232,
+    80,7,8, 0,8,92, 0,8,28, 0,9,152,
+    84,7,83, 0,8,124, 0,8,60, 0,9,216,
+    82,7,23, 0,8,108, 0,8,44, 0,9,184,
+    0,8,12, 0,8,140, 0,8,76, 0,9,248,
+    80,7,3, 0,8,82, 0,8,18, 85,8,163,
+    83,7,35, 0,8,114, 0,8,50, 0,9,196,
+    81,7,11, 0,8,98, 0,8,34, 0,9,164,
+    0,8,2, 0,8,130, 0,8,66, 0,9,228,
+    80,7,7, 0,8,90, 0,8,26, 0,9,148,
+    84,7,67, 0,8,122, 0,8,58, 0,9,212,
+    82,7,19, 0,8,106, 0,8,42, 0,9,180,
+    0,8,10, 0,8,138, 0,8,74, 0,9,244,
+    80,7,5, 0,8,86, 0,8,22, 192,8,0,
+    83,7,51, 0,8,118, 0,8,54, 0,9,204,
+    81,7,15, 0,8,102, 0,8,38, 0,9,172,
+    0,8,6, 0,8,134, 0,8,70, 0,9,236,
+    80,7,9, 0,8,94, 0,8,30, 0,9,156,
+    84,7,99, 0,8,126, 0,8,62, 0,9,220,
+    82,7,27, 0,8,110, 0,8,46, 0,9,188,
+    0,8,14, 0,8,142, 0,8,78, 0,9,252,
+    96,7,256, 0,8,81, 0,8,17, 85,8,131,
+    82,7,31, 0,8,113, 0,8,49, 0,9,194,
+    80,7,10, 0,8,97, 0,8,33, 0,9,162,
+    0,8,1, 0,8,129, 0,8,65, 0,9,226,
+    80,7,6, 0,8,89, 0,8,25, 0,9,146,
+    83,7,59, 0,8,121, 0,8,57, 0,9,210,
+    81,7,17, 0,8,105, 0,8,41, 0,9,178,
+    0,8,9, 0,8,137, 0,8,73, 0,9,242,
+    80,7,4, 0,8,85, 0,8,21, 80,8,258,
+    83,7,43, 0,8,117, 0,8,53, 0,9,202,
+    81,7,13, 0,8,101, 0,8,37, 0,9,170,
+    0,8,5, 0,8,133, 0,8,69, 0,9,234,
+    80,7,8, 0,8,93, 0,8,29, 0,9,154,
+    84,7,83, 0,8,125, 0,8,61, 0,9,218,
+    82,7,23, 0,8,109, 0,8,45, 0,9,186,
+    0,8,13, 0,8,141, 0,8,77, 0,9,250,
+    80,7,3, 0,8,83, 0,8,19, 85,8,195,
+    83,7,35, 0,8,115, 0,8,51, 0,9,198,
+    81,7,11, 0,8,99, 0,8,35, 0,9,166,
+    0,8,3, 0,8,131, 0,8,67, 0,9,230,
+    80,7,7, 0,8,91, 0,8,27, 0,9,150,
+    84,7,67, 0,8,123, 0,8,59, 0,9,214,
+    82,7,19, 0,8,107, 0,8,43, 0,9,182,
+    0,8,11, 0,8,139, 0,8,75, 0,9,246,
+    80,7,5, 0,8,87, 0,8,23, 192,8,0,
+    83,7,51, 0,8,119, 0,8,55, 0,9,206,
+    81,7,15, 0,8,103, 0,8,39, 0,9,174,
+    0,8,7, 0,8,135, 0,8,71, 0,9,238,
+    80,7,9, 0,8,95, 0,8,31, 0,9,158,
+    84,7,99, 0,8,127, 0,8,63, 0,9,222,
+    82,7,27, 0,8,111, 0,8,47, 0,9,190,
+    0,8,15, 0,8,143, 0,8,79, 0,9,254,
+    96,7,256, 0,8,80, 0,8,16, 84,8,115,
+    82,7,31, 0,8,112, 0,8,48, 0,9,193,
+
+    80,7,10, 0,8,96, 0,8,32, 0,9,161,
+    0,8,0, 0,8,128, 0,8,64, 0,9,225,
+    80,7,6, 0,8,88, 0,8,24, 0,9,145,
+    83,7,59, 0,8,120, 0,8,56, 0,9,209,
+    81,7,17, 0,8,104, 0,8,40, 0,9,177,
+    0,8,8, 0,8,136, 0,8,72, 0,9,241,
+    80,7,4, 0,8,84, 0,8,20, 85,8,227,
+    83,7,43, 0,8,116, 0,8,52, 0,9,201,
+    81,7,13, 0,8,100, 0,8,36, 0,9,169,
+    0,8,4, 0,8,132, 0,8,68, 0,9,233,
+    80,7,8, 0,8,92, 0,8,28, 0,9,153,
+    84,7,83, 0,8,124, 0,8,60, 0,9,217,
+    82,7,23, 0,8,108, 0,8,44, 0,9,185,
+    0,8,12, 0,8,140, 0,8,76, 0,9,249,
+    80,7,3, 0,8,82, 0,8,18, 85,8,163,
+    83,7,35, 0,8,114, 0,8,50, 0,9,197,
+    81,7,11, 0,8,98, 0,8,34, 0,9,165,
+    0,8,2, 0,8,130, 0,8,66, 0,9,229,
+    80,7,7, 0,8,90, 0,8,26, 0,9,149,
+    84,7,67, 0,8,122, 0,8,58, 0,9,213,
+    82,7,19, 0,8,106, 0,8,42, 0,9,181,
+    0,8,10, 0,8,138, 0,8,74, 0,9,245,
+    80,7,5, 0,8,86, 0,8,22, 192,8,0,
+    83,7,51, 0,8,118, 0,8,54, 0,9,205,
+    81,7,15, 0,8,102, 0,8,38, 0,9,173,
+    0,8,6, 0,8,134, 0,8,70, 0,9,237,
+    80,7,9, 0,8,94, 0,8,30, 0,9,157,
+    84,7,99, 0,8,126, 0,8,62, 0,9,221,
+    82,7,27, 0,8,110, 0,8,46, 0,9,189,
+    0,8,14, 0,8,142, 0,8,78, 0,9,253,
+    96,7,256, 0,8,81, 0,8,17, 85,8,131,
+    82,7,31, 0,8,113, 0,8,49, 0,9,195,
+    80,7,10, 0,8,97, 0,8,33, 0,9,163,
+    0,8,1, 0,8,129, 0,8,65, 0,9,227,
+    80,7,6, 0,8,89, 0,8,25, 0,9,147,
+    83,7,59, 0,8,121, 0,8,57, 0,9,211,
+    81,7,17, 0,8,105, 0,8,41, 0,9,179,
+    0,8,9, 0,8,137, 0,8,73, 0,9,243,
+    80,7,4, 0,8,85, 0,8,21, 80,8,258,
+    83,7,43, 0,8,117, 0,8,53, 0,9,203,
+    81,7,13, 0,8,101, 0,8,37, 0,9,171,
+    0,8,5, 0,8,133, 0,8,69, 0,9,235,
+    80,7,8, 0,8,93, 0,8,29, 0,9,155,
+    84,7,83, 0,8,125, 0,8,61, 0,9,219,
+    82,7,23, 0,8,109, 0,8,45, 0,9,187,
+    0,8,13, 0,8,141, 0,8,77, 0,9,251,
+    80,7,3, 0,8,83, 0,8,19, 85,8,195,
+    83,7,35, 0,8,115, 0,8,51, 0,9,199,
+    81,7,11, 0,8,99, 0,8,35, 0,9,167,
+    0,8,3, 0,8,131, 0,8,67, 0,9,231,
+    80,7,7, 0,8,91, 0,8,27, 0,9,151,
+    84,7,67, 0,8,123, 0,8,59, 0,9,215,
+    82,7,19, 0,8,107, 0,8,43, 0,9,183,
+    0,8,11, 0,8,139, 0,8,75, 0,9,247,
+    80,7,5, 0,8,87, 0,8,23, 192,8,0,
+    83,7,51, 0,8,119, 0,8,55, 0,9,207,
+    81,7,15, 0,8,103, 0,8,39, 0,9,175,
+    0,8,7, 0,8,135, 0,8,71, 0,9,239,
+    80,7,9, 0,8,95, 0,8,31, 0,9,159,
+    84,7,99, 0,8,127, 0,8,63, 0,9,223,
+    82,7,27, 0,8,111, 0,8,47, 0,9,191,
+    0,8,15, 0,8,143, 0,8,79, 0,9,255
+  };
+  static final int[] fixed_td = {
+    80,5,1, 87,5,257, 83,5,17, 91,5,4097,
+    81,5,5, 89,5,1025, 85,5,65, 93,5,16385,
+    80,5,3, 88,5,513, 84,5,33, 92,5,8193,
+    82,5,9, 90,5,2049, 86,5,129, 192,5,24577,
+    80,5,2, 87,5,385, 83,5,25, 91,5,6145,
+    81,5,7, 89,5,1537, 85,5,97, 93,5,24577,
+    80,5,4, 88,5,769, 84,5,49, 92,5,12289,
+    82,5,13, 90,5,3073, 86,5,193, 192,5,24577
+  };
+
+  // Tables for deflate from PKZIP's appnote.txt.
+  static final int[] cplens = { // Copy lengths for literal codes 257..285
+        3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+        35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0
+  };
+
+  // see note #13 above about 258
+  static final int[] cplext = { // Extra bits for literal codes 257..285
+        0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
+        3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 112, 112  // 112==invalid
+  };
+
+  static final int[] cpdist = { // Copy offsets for distance codes 0..29
+        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+        257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+        8193, 12289, 16385, 24577
+  };
+
+  static final int[] cpdext = { // Extra bits for distance codes
+        0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
+        7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
+        12, 12, 13, 13};
+
+  // If BMAX needs to be larger than 16, then h and x[] should be uLong.
+  static final int BMAX=15;         // maximum bit length of any code
+
+  int[] hn = null;  // hufts used in space
+  int[] v = null;   // work area for huft_build 
+  int[] c = null;   // bit length count table
+  int[] r = null;   // table entry for structure assignment
+  int[] u = null;   // table stack
+  int[] x = null;   // bit offsets, then code stack
+
+  private int huft_build(int[] b, // code lengths in bits (all assumed <= BMAX)
+                         int bindex, 
+                         int n,   // number of codes (assumed <= 288)
+                         int s,   // number of simple-valued codes (0..s-1)
+                         int[] d, // list of base values for non-simple codes
+                         int[] e, // list of extra bits for non-simple codes
+                         int[] t, // result: starting table
+                         int[] m, // maximum lookup bits, returns actual
+                         int[] hp,// space for trees
+                         int[] hn,// hufts used in space
+                         int[] v  // working area: values in order of bit length
+                         ){
+    // Given a list of code lengths and a maximum table size, make a set of
+    // tables to decode that set of codes.  Return Z_OK on success, Z_BUF_ERROR
+    // if the given code set is incomplete (the tables are still built in this
+    // case), Z_DATA_ERROR if the input is invalid (an over-subscribed set of
+    // lengths), or Z_MEM_ERROR if not enough memory.
+
+    int a;                       // counter for codes of length k
+    int f;                       // i repeats in table every f entries
+    int g;                       // maximum code length
+    int h;                       // table level
+    int i;                       // counter, current code
+    int j;                       // counter
+    int k;                       // number of bits in current code
+    int l;                       // bits per table (returned in m)
+    int mask;                    // (1 << w) - 1, to avoid cc -O bug on HP
+    int p;                       // pointer into c[], b[], or v[]
+    int q;                       // points to current table
+    int w;                       // bits before this table == (l * h)
+    int xp;                      // pointer into x
+    int y;                       // number of dummy codes added
+    int z;                       // number of entries in current table
+
+    // Generate counts for each bit length
+
+    p = 0; i = n;
+    do {
+      c[b[bindex+p]]++; p++; i--;   // assume all entries <= BMAX
+    }while(i!=0);
+
+    if(c[0] == n){                // null input--all zero length codes
+      t[0] = -1;
+      m[0] = 0;
+      return Z_OK;
+    }
+
+    // Find minimum and maximum length, bound *m by those
+    l = m[0];
+    for (j = 1; j <= BMAX; j++)
+      if(c[j]!=0) break;
+    k = j;                        // minimum code length
+    if(l < j){
+      l = j;
+    }
+    for (i = BMAX; i!=0; i--){
+      if(c[i]!=0) break;
+    }
+    g = i;                        // maximum code length
+    if(l > i){
+      l = i;
+    }
+    m[0] = l;
+
+    // Adjust last length count to fill out codes, if needed
+    for (y = 1 << j; j < i; j++, y <<= 1){
+      if ((y -= c[j]) < 0){
+        return Z_DATA_ERROR;
+      }
+    }
+    if ((y -= c[i]) < 0){
+      return Z_DATA_ERROR;
+    }
+    c[i] += y;
+
+    // Generate starting offsets into the value table for each length
+    x[1] = j = 0;
+    p = 1;  xp = 2;
+    while (--i!=0) {                 // note that i == g from above
+      x[xp] = (j += c[p]);
+      xp++;
+      p++;
+    }
+
+    // Make a table of values in order of bit lengths
+    i = 0; p = 0;
+    do {
+      if ((j = b[bindex+p]) != 0){
+        v[x[j]++] = i;
+      }
+      p++;
+    }
+    while (++i < n);
+    n = x[g];                     // set n to length of v
+
+    // Generate the Huffman codes and for each, make the table entries
+    x[0] = i = 0;                 // first Huffman code is zero
+    p = 0;                        // grab values in bit order
+    h = -1;                       // no tables yet--level -1
+    w = -l;                       // bits decoded == (l * h)
+    u[0] = 0;                     // just to keep compilers happy
+    q = 0;                        // ditto
+    z = 0;                        // ditto
+
+    // go through the bit lengths (k already is bits in shortest code)
+    for (; k <= g; k++){
+      a = c[k];
+      while (a--!=0){
+	// here i is the Huffman code of length k bits for value *p
+	// make tables up to required level
+        while (k > w + l){
+          h++;
+          w += l;                 // previous table always l bits
+	  // compute minimum size table less than or equal to l bits
+          z = g - w;
+          z = (z > l) ? l : z;        // table size upper limit
+          if((f=1<<(j=k-w))>a+1){     // try a k-w bit table
+                                      // too few codes for k-w bit table
+            f -= a + 1;               // deduct codes from patterns left
+            xp = k;
+            if(j < z){
+              while (++j < z){        // try smaller tables up to z bits
+                if((f <<= 1) <= c[++xp])
+                  break;              // enough codes to use up j bits
+                f -= c[xp];           // else deduct codes from patterns
+              }
+	    }
+          }
+          z = 1 << j;                 // table entries for j-bit table
+
+	  // allocate new table
+          if (hn[0] + z > MANY){       // (note: doesn't matter for fixed)
+            return Z_DATA_ERROR;       // overflow of MANY
+          }
+          u[h] = q = /*hp+*/ hn[0];   // DEBUG
+          hn[0] += z;
+ 
+	  // connect to last table, if there is one
+	  if(h!=0){
+            x[h]=i;           // save pattern for backing up
+            r[0]=(byte)j;     // bits in this table
+            r[1]=(byte)l;     // bits to dump before this table
+            j=i>>>(w - l);
+            r[2] = (int)(q - u[h-1] - j);               // offset to this table
+            System.arraycopy(r, 0, hp, (u[h-1]+j)*3, 3); // connect to last table
+          }
+          else{
+            t[0] = q;               // first table is returned result
+	  }
+        }
+
+	// set up table entry in r
+        r[1] = (byte)(k - w);
+        if (p >= n){
+          r[0] = 128 + 64;      // out of values--invalid code
+	}
+        else if (v[p] < s){
+          r[0] = (byte)(v[p] < 256 ? 0 : 32 + 64);  // 256 is end-of-block
+          r[2] = v[p++];          // simple code is just the value
+        }
+        else{
+          r[0]=(byte)(e[v[p]-s]+16+64); // non-simple--look up in lists
+          r[2]=d[v[p++] - s];
+        }
+
+        // fill code-like entries with r
+        f=1<<(k-w);
+        for (j=i>>>w;j>>= 1){
+          i ^= j;
+	}
+        i ^= j;
+
+	// backup over finished tables
+        mask = (1 << w) - 1;      // needed on HP, cc -O bug
+        while ((i & mask) != x[h]){
+          h--;                    // don't need to update q
+          w -= l;
+          mask = (1 << w) - 1;
+        }
+      }
+    }
+    // Return Z_BUF_ERROR if we were given an incomplete table
+    return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
+  }
+
+  int inflate_trees_bits(int[] c,  // 19 code lengths
+                         int[] bb, // bits tree desired/actual depth
+                         int[] tb, // bits tree result
+                         int[] hp, // space for trees
+                         ZStream z // for messages
+                         ){
+    int result;
+    initWorkArea(19);
+    hn[0]=0;
+    result = huft_build(c, 0, 19, 19, null, null, tb, bb, hp, hn, v);
+
+    if(result == Z_DATA_ERROR){
+      z.msg = "oversubscribed dynamic bit lengths tree";
+    }
+    else if(result == Z_BUF_ERROR || bb[0] == 0){
+      z.msg = "incomplete dynamic bit lengths tree";
+      result = Z_DATA_ERROR;
+    }
+    return result;
+  }
+
+  int inflate_trees_dynamic(int nl,   // number of literal/length codes
+                            int nd,   // number of distance codes
+                            int[] c,  // that many (total) code lengths
+                            int[] bl, // literal desired/actual bit depth
+                            int[] bd, // distance desired/actual bit depth 
+                            int[] tl, // literal/length tree result
+                            int[] td, // distance tree result
+                            int[] hp, // space for trees
+                            ZStream z // for messages
+                            ){
+    int result;
+
+    // build literal/length tree
+    initWorkArea(288);
+    hn[0]=0;
+    result = huft_build(c, 0, nl, 257, cplens, cplext, tl, bl, hp, hn, v);
+    if (result != Z_OK || bl[0] == 0){
+      if(result == Z_DATA_ERROR){
+        z.msg = "oversubscribed literal/length tree";
+      }
+      else if (result != Z_MEM_ERROR){
+        z.msg = "incomplete literal/length tree";
+        result = Z_DATA_ERROR;
+      }
+      return result;
+    }
+
+    // build distance tree
+    initWorkArea(288);
+    result = huft_build(c, nl, nd, 0, cpdist, cpdext, td, bd, hp, hn, v);
+
+    if (result != Z_OK || (bd[0] == 0 && nl > 257)){
+      if (result == Z_DATA_ERROR){
+        z.msg = "oversubscribed distance tree";
+      }
+      else if (result == Z_BUF_ERROR) {
+        z.msg = "incomplete distance tree";
+        result = Z_DATA_ERROR;
+      }
+      else if (result != Z_MEM_ERROR){
+        z.msg = "empty distance tree with lengths";
+        result = Z_DATA_ERROR;
+      }
+      return result;
+    }
+
+    return Z_OK;
+  }
+
+  static int inflate_trees_fixed(int[] bl,  //literal desired/actual bit depth
+                                 int[] bd,  //distance desired/actual bit depth
+                                 int[][] tl,//literal/length tree result
+                                 int[][] td,//distance tree result 
+                                 ZStream z  //for memory allocation
+				 ){
+    bl[0]=fixed_bl;
+    bd[0]=fixed_bd;
+    tl[0]=fixed_tl;
+    td[0]=fixed_td;
+    return Z_OK;
+  }
+
+  private void initWorkArea(int vsize){
+    if(hn==null){
+      hn=new int[1];
+      v=new int[vsize];
+      c=new int[BMAX+1];
+      r=new int[3];
+      u=new int[BMAX];
+      x=new int[BMAX+1];
+    }
+    if(v.lengthstate);
+    return Z_OK;
+  }
+
+  int inflateInit(ZStream z, int w){
+    z.msg = null;
+    blocks = null;
+
+    // handle undocumented nowrap option (no zlib header or check)
+    nowrap = 0;
+    if(w < 0){
+      w = - w;
+      nowrap = 1;
+    }
+
+    // set window size
+    if(w<8 ||w>15){
+      inflateEnd(z);
+      return Z_STREAM_ERROR;
+    }
+    wbits=w;
+
+    z.istate.blocks=new InfBlocks(z, 
+				  z.istate.nowrap!=0 ? null : this,
+				  1<>4)+8>z.istate.wbits){
+          z.istate.mode = BAD;
+          z.msg="invalid window size";
+          z.istate.marker = 5;       // can't try inflateSync
+          break;
+        }
+        z.istate.mode=FLAG;
+      case FLAG:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        b = (z.next_in[z.next_in_index++])&0xff;
+
+        if((((z.istate.method << 8)+b) % 31)!=0){
+          z.istate.mode = BAD;
+          z.msg = "incorrect header check";
+          z.istate.marker = 5;       // can't try inflateSync
+          break;
+        }
+
+        if((b&PRESET_DICT)==0){
+          z.istate.mode = BLOCKS;
+          break;
+        }
+        z.istate.mode = DICT4;
+      case DICT4:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        z.istate.need=((z.next_in[z.next_in_index++]&0xff)<<24)&0xff000000L;
+        z.istate.mode=DICT3;
+      case DICT3:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        z.istate.need+=((z.next_in[z.next_in_index++]&0xff)<<16)&0xff0000L;
+        z.istate.mode=DICT2;
+      case DICT2:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        z.istate.need+=((z.next_in[z.next_in_index++]&0xff)<<8)&0xff00L;
+        z.istate.mode=DICT1;
+      case DICT1:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        z.istate.need += (z.next_in[z.next_in_index++]&0xffL);
+        z.adler = z.istate.need;
+        z.istate.mode = DICT0;
+        return Z_NEED_DICT;
+      case DICT0:
+        z.istate.mode = BAD;
+        z.msg = "need dictionary";
+        z.istate.marker = 0;       // can try inflateSync
+        return Z_STREAM_ERROR;
+      case BLOCKS:
+
+        r = z.istate.blocks.proc(z, r);
+        if(r == Z_DATA_ERROR){
+          z.istate.mode = BAD;
+          z.istate.marker = 0;     // can try inflateSync
+          break;
+        }
+        if(r == Z_OK){
+          r = f;
+        }
+        if(r != Z_STREAM_END){
+          return r;
+        }
+        r = f;
+        z.istate.blocks.reset(z, z.istate.was);
+        if(z.istate.nowrap!=0){
+          z.istate.mode=DONE;
+          break;
+        }
+        z.istate.mode=CHECK4;
+      case CHECK4:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        z.istate.need=((z.next_in[z.next_in_index++]&0xff)<<24)&0xff000000L;
+        z.istate.mode=CHECK3;
+      case CHECK3:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        z.istate.need+=((z.next_in[z.next_in_index++]&0xff)<<16)&0xff0000L;
+        z.istate.mode = CHECK2;
+      case CHECK2:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        z.istate.need+=((z.next_in[z.next_in_index++]&0xff)<<8)&0xff00L;
+        z.istate.mode = CHECK1;
+      case CHECK1:
+
+        if(z.avail_in==0)return r;r=f;
+
+        z.avail_in--; z.total_in++;
+        z.istate.need+=(z.next_in[z.next_in_index++]&0xffL);
+
+        if(((int)(z.istate.was[0])) != ((int)(z.istate.need))){
+          z.istate.mode = BAD;
+          z.msg = "incorrect data check";
+          z.istate.marker = 5;       // can't try inflateSync
+          break;
+        }
+
+        z.istate.mode = DONE;
+      case DONE:
+        return Z_STREAM_END;
+      case BAD:
+        return Z_DATA_ERROR;
+      default:
+        return Z_STREAM_ERROR;
+      }
+    }
+  }
+
+
+  int inflateSetDictionary(ZStream z, byte[] dictionary, int dictLength){
+    int index=0;
+    int length = dictLength;
+    if(z==null || z.istate == null|| z.istate.mode != DICT0)
+      return Z_STREAM_ERROR;
+
+    if(z._adler.adler32(1L, dictionary, 0, dictLength)!=z.adler){
+      return Z_DATA_ERROR;
+    }
+
+    z.adler = z._adler.adler32(0, null, 0, 0);
+
+    if(length >= (1<>>7)]);
+  }
+
+  short[] dyn_tree;      // the dynamic tree
+  int     max_code;      // largest code with non zero frequency
+  StaticTree stat_desc;  // the corresponding static tree
+
+  // Compute the optimal bit lengths for a tree and update the total bit length
+  // for the current block.
+  // IN assertion: the fields freq and dad are set, heap[heap_max] and
+  //    above are the tree nodes sorted by increasing frequency.
+  // OUT assertions: the field len is set to the optimal bit length, the
+  //     array bl_count contains the frequencies for each bit length.
+  //     The length opt_len is updated; static_len is also updated if stree is
+  //     not null.
+  void gen_bitlen(Deflate s){
+    short[] tree = dyn_tree;
+    short[] stree = stat_desc.static_tree;
+    int[] extra = stat_desc.extra_bits;
+    int base = stat_desc.extra_base;
+    int max_length = stat_desc.max_length;
+    int h;              // heap index
+    int n, m;           // iterate over the tree elements
+    int bits;           // bit length
+    int xbits;          // extra bits
+    short f;            // frequency
+    int overflow = 0;   // number of elements with bit length too large
+
+    for (bits = 0; bits <= MAX_BITS; bits++) s.bl_count[bits] = 0;
+
+    // In a first pass, compute the optimal bit lengths (which may
+    // overflow in the case of the bit length tree).
+    tree[s.heap[s.heap_max]*2+1] = 0; // root of the heap
+
+    for(h=s.heap_max+1; h max_length){ bits = max_length; overflow++; }
+      tree[n*2+1] = (short)bits;
+      // We overwrite tree[n*2+1] which is no longer needed
+
+      if (n > max_code) continue;  // not a leaf node
+
+      s.bl_count[bits]++;
+      xbits = 0;
+      if (n >= base) xbits = extra[n-base];
+      f = tree[n*2];
+      s.opt_len += f * (bits + xbits);
+      if (stree!=null) s.static_len += f * (stree[n*2+1] + xbits);
+    }
+    if (overflow == 0) return;
+
+    // This happens for example on obj2 and pic of the Calgary corpus
+    // Find the first bit length which could increase:
+    do {
+      bits = max_length-1;
+      while(s.bl_count[bits]==0) bits--;
+      s.bl_count[bits]--;      // move one leaf down the tree
+      s.bl_count[bits+1]+=2;   // move one overflow item as its brother
+      s.bl_count[max_length]--;
+      // The brother of the overflow item also moves one step up,
+      // but this does not affect bl_count[max_length]
+      overflow -= 2;
+    }
+    while (overflow > 0);
+
+    for (bits = max_length; bits != 0; bits--) {
+      n = s.bl_count[bits];
+      while (n != 0) {
+	m = s.heap[--h];
+	if (m > max_code) continue;
+	if (tree[m*2+1] != bits) {
+	  s.opt_len += ((long)bits - (long)tree[m*2+1])*(long)tree[m*2];
+	  tree[m*2+1] = (short)bits;
+	}
+	n--;
+      }
+    }
+  }
+
+  // Construct one Huffman tree and assigns the code bit strings and lengths.
+  // Update the total bit length for the current block.
+  // IN assertion: the field freq is set for all tree elements.
+  // OUT assertions: the fields len and code are set to the optimal bit length
+  //     and corresponding code. The length opt_len is updated; static_len is
+  //     also updated if stree is not null. The field max_code is set.
+  void build_tree(Deflate s){
+    short[] tree=dyn_tree;
+    short[] stree=stat_desc.static_tree;
+    int elems=stat_desc.elems;
+    int n, m;          // iterate over heap elements
+    int max_code=-1;   // largest code with non zero frequency
+    int node;          // new node being created
+
+    // Construct the initial heap, with least frequent element in
+    // heap[1]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
+    // heap[0] is not used.
+    s.heap_len = 0;
+    s.heap_max = HEAP_SIZE;
+
+    for(n=0; n=1; n--)
+      s.pqdownheap(tree, n);
+
+    // Construct the Huffman tree by repeatedly combining the least two
+    // frequent nodes.
+
+    node=elems;                 // next internal node of the tree
+    do{
+      // n = node of least frequency
+      n=s.heap[1];
+      s.heap[1]=s.heap[s.heap_len--];
+      s.pqdownheap(tree, 1);
+      m=s.heap[1];                // m = node of next least frequency
+
+      s.heap[--s.heap_max] = n; // keep the nodes sorted by frequency
+      s.heap[--s.heap_max] = m;
+
+      // Create a new node father of n and m
+      tree[node*2] = (short)(tree[n*2] + tree[m*2]);
+      s.depth[node] = (byte)(Math.max(s.depth[n],s.depth[m])+1);
+      tree[n*2+1] = tree[m*2+1] = (short)node;
+
+      // and insert the new node in the heap
+      s.heap[1] = node++;
+      s.pqdownheap(tree, 1);
+    }
+    while(s.heap_len>=2);
+
+    s.heap[--s.heap_max] = s.heap[1];
+
+    // At this point, the fields freq and dad are set. We can now
+    // generate the bit lengths.
+
+    gen_bitlen(s);
+
+    // The field len is now set, we can generate the bit codes
+    gen_codes(tree, max_code, s.bl_count);
+  }
+
+  // Generate the codes for a given tree and bit counts (which need not be
+  // optimal).
+  // IN assertion: the array bl_count contains the bit length statistics for
+  // the given tree and the field len is set for all tree elements.
+  // OUT assertion: the field code is set for all tree elements of non
+  //     zero code length.
+  static void gen_codes(short[] tree, // the tree to decorate
+			int max_code, // largest code with non zero frequency
+			short[] bl_count // number of codes at each bit length
+			){
+    short[] next_code=new short[MAX_BITS+1]; // next code value for each bit length
+    short code = 0;            // running code value
+    int bits;                  // bit index
+    int n;                     // code index
+
+    // The distribution counts are first used to generate the code values
+    // without bit reversal.
+    for (bits = 1; bits <= MAX_BITS; bits++) {
+      next_code[bits] = code = (short)((code + bl_count[bits-1]) << 1);
+    }
+
+    // Check that the bit counts in bl_count are consistent. The last code
+    // must be all ones.
+    //Assert (code + bl_count[MAX_BITS]-1 == (1<>>=1;
+      res<<=1;
+    } 
+    while(--len>0);
+    return res>>>1;
+  }
+}
+
diff --git a/src/com/jcraft/jzlib/ZInputStream.java b/src/com/jcraft/jzlib/ZInputStream.java
new file mode 100644
index 000000000..3f97c4483
--- /dev/null
+++ b/src/com/jcraft/jzlib/ZInputStream.java
@@ -0,0 +1,149 @@
+/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
+/*
+Copyright (c) 2001 Lapo Luchini.
+
+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 THE AUTHORS
+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 com.jcraft.jzlib;
+import java.io.*;
+
+public class ZInputStream extends FilterInputStream {
+
+  protected ZStream z=new ZStream();
+  protected int bufsize=512;
+  protected int flush=JZlib.Z_NO_FLUSH;
+  protected byte[] buf=new byte[bufsize],
+                   buf1=new byte[1];
+  protected boolean compress;
+
+  protected InputStream in=null;
+
+  public ZInputStream(InputStream in) {
+    this(in, false);
+  }
+  public ZInputStream(InputStream in, boolean nowrap) {
+    super(in);
+    this.in=in;
+    z.inflateInit(nowrap);
+    compress=false;
+    z.next_in=buf;
+    z.next_in_index=0;
+    z.avail_in=0;
+  }
+
+  public ZInputStream(InputStream in, int level) {
+    super(in);
+    this.in=in;
+    z.deflateInit(level);
+    compress=true;
+    z.next_in=buf;
+    z.next_in_index=0;
+    z.avail_in=0;
+  }
+
+  /*public int available() throws IOException {
+    return inf.finished() ? 0 : 1;
+  }*/
+
+  public int read() throws IOException {
+    if(read(buf1, 0, 1)==-1)
+      return(-1);
+    return(buf1[0]&0xFF);
+  }
+
+  private boolean nomoreinput=false;
+
+  public int read(byte[] b, int off, int len) throws IOException {
+    if(len==0)
+      return(0);
+    int err;
+    z.next_out=b;
+    z.next_out_index=off;
+    z.avail_out=len;
+    do {
+      if((z.avail_in==0)&&(!nomoreinput)) { // if buffer is empty and more input is avaiable, refill it
+	z.next_in_index=0;
+	z.avail_in=in.read(buf, 0, bufsize);//(bufsize0 || z.avail_out==0);
+  }
+
+  public int getFlushMode() {
+    return(flush);
+  }
+
+  public void setFlushMode(int flush) {
+    this.flush=flush;
+  }
+
+  public void finish() throws IOException {
+    int err;
+    do{
+      z.next_out=buf;
+      z.next_out_index=0;
+      z.avail_out=bufsize;
+      if(compress){ err=z.deflate(JZlib.Z_FINISH);  }
+      else{ err=z.inflate(JZlib.Z_FINISH); }
+      if(err!=JZlib.Z_STREAM_END && err != JZlib.Z_OK)
+      throw new ZStreamException((compress?"de":"in")+"flating: "+z.msg);
+      if(bufsize-z.avail_out>0){
+	out.write(buf, 0, bufsize-z.avail_out);
+      }
+    }
+    while(z.avail_in>0 || z.avail_out==0);
+    flush();
+  }
+  public void end() {
+    if(z==null)
+      return;
+    if(compress){ z.deflateEnd(); }
+    else{ z.inflateEnd(); }
+    z.free();
+    z=null;
+  }
+  public void close() throws IOException {
+    try{
+      try{finish();}
+      catch (IOException ignored) {}
+    }
+    finally{
+      end();
+      out.close();
+      out=null;
+    }
+  }
+
+  /**
+   * Returns the total number of bytes input so far.
+   */
+  public long getTotalIn() {
+    return z.total_in;
+  }
+
+  /**
+   * Returns the total number of bytes output so far.
+   */
+  public long getTotalOut() {
+    return z.total_out;
+  }
+
+  public void flush() throws IOException {
+    out.flush();
+  }
+
+}
diff --git a/src/com/jcraft/jzlib/ZStream.java b/src/com/jcraft/jzlib/ZStream.java
new file mode 100644
index 000000000..4e208527e
--- /dev/null
+++ b/src/com/jcraft/jzlib/ZStream.java
@@ -0,0 +1,195 @@
+/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
+/*
+Copyright (c) 2000,2001,2002,2003 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 com.jcraft.jzlib;
+
+final public class ZStream{
+
+  static final private int MAX_WBITS=15;        // 32K LZ77 window
+  static final private int DEF_WBITS=MAX_WBITS;
+
+  static final private int Z_STREAM_ERROR=-2;
+
+  public byte[] next_in;     // next input byte
+  public int next_in_index;
+  public int avail_in;       // number of bytes available at next_in
+  public long total_in;      // total nb of input bytes read so far
+
+  public byte[] next_out;    // next output byte should be put there
+  public int next_out_index;
+  public int avail_out;      // remaining free space at next_out
+  public long total_out;     // total nb of bytes output so far
+
+  public String msg;
+
+  Deflate dstate; 
+  Inflate istate; 
+
+  int data_type; // best guess about the data type: ascii or binary
+
+  public long adler;
+  Adler32 _adler=new Adler32();
+
+  public int inflateInit(){
+    return inflateInit(DEF_WBITS);
+  }
+  public int inflateInit(boolean nowrap){
+    return inflateInit(DEF_WBITS, nowrap);
+  }
+  public int inflateInit(int w){
+    return inflateInit(w, false);
+  }
+
+  public int inflateInit(int w, boolean nowrap){
+    istate=new Inflate();
+    return istate.inflateInit(this, nowrap?-w:w);
+  }
+
+  public int inflate(int f){
+    if(istate==null) return Z_STREAM_ERROR;
+    return istate.inflate(this, f);
+  }
+  public int inflateEnd(){
+    if(istate==null) return Z_STREAM_ERROR;
+    int ret=istate.inflateEnd(this);
+    istate = null;
+    return ret;
+  }
+  public int inflateSync(){
+    if(istate == null)
+      return Z_STREAM_ERROR;
+    return istate.inflateSync(this);
+  }
+  public int inflateSetDictionary(byte[] dictionary, int dictLength){
+    if(istate == null)
+      return Z_STREAM_ERROR;
+    return istate.inflateSetDictionary(this, dictionary, dictLength);
+  }
+
+  public int deflateInit(int level){
+    return deflateInit(level, MAX_WBITS);
+  }
+  public int deflateInit(int level, boolean nowrap){
+    return deflateInit(level, MAX_WBITS, nowrap);
+  }
+  public int deflateInit(int level, int bits){
+    return deflateInit(level, bits, false);
+  }
+  public int deflateInit(int level, int bits, boolean nowrap){
+    dstate=new Deflate();
+    return dstate.deflateInit(this, level, nowrap?-bits:bits);
+  }
+  public int deflate(int flush){
+    if(dstate==null){
+      return Z_STREAM_ERROR;
+    }
+    return dstate.deflate(this, flush);
+  }
+  public int deflateEnd(){
+    if(dstate==null) return Z_STREAM_ERROR;
+    int ret=dstate.deflateEnd();
+    dstate=null;
+    return ret;
+  }
+  public int deflateParams(int level, int strategy){
+    if(dstate==null) return Z_STREAM_ERROR;
+    return dstate.deflateParams(this, level, strategy);
+  }
+  public int deflateSetDictionary (byte[] dictionary, int dictLength){
+    if(dstate == null)
+      return Z_STREAM_ERROR;
+    return dstate.deflateSetDictionary(this, dictionary, dictLength);
+  }
+
+  // Flush as much pending output as possible. All deflate() output goes
+  // through this function so some applications may wish to modify it
+  // to avoid allocating a large strm->next_out buffer and copying into it.
+  // (See also read_buf()).
+  void flush_pending(){
+    int len=dstate.pending;
+
+    if(len>avail_out) len=avail_out;
+    if(len==0) return;
+
+    if(dstate.pending_buf.length<=dstate.pending_out ||
+       next_out.length<=next_out_index ||
+       dstate.pending_buf.length<(dstate.pending_out+len) ||
+       next_out.length<(next_out_index+len)){
+      System.out.println(dstate.pending_buf.length+", "+dstate.pending_out+
+			 ", "+next_out.length+", "+next_out_index+", "+len);
+      System.out.println("avail_out="+avail_out);
+    }
+
+    System.arraycopy(dstate.pending_buf, dstate.pending_out,
+		     next_out, next_out_index, len);
+
+    next_out_index+=len;
+    dstate.pending_out+=len;
+    total_out+=len;
+    avail_out-=len;
+    dstate.pending-=len;
+    if(dstate.pending==0){
+      dstate.pending_out=0;
+    }
+  }
+
+  // Read a new buffer from the current input stream, update the adler32
+  // and total number of bytes read.  All deflate() input goes through
+  // this function so some applications may wish to modify it to avoid
+  // allocating a large strm->next_in buffer and copying from it.
+  // (See also flush_pending()).
+  int read_buf(byte[] buf, int start, int size) {
+    int len=avail_in;
+
+    if(len>size) len=size;
+    if(len==0) return 0;
+
+    avail_in-=len;
+
+    if(dstate.noheader==0) {
+      adler=_adler.adler32(adler, next_in, next_in_index, len);
+    }
+    System.arraycopy(next_in, next_in_index, buf, start, len);
+    next_in_index  += len;
+    total_in += len;
+    return len;
+  }
+
+  public void free(){
+    next_in=null;
+    next_out=null;
+    msg=null;
+    _adler=null;
+  }
+}
diff --git a/src/com/jcraft/jzlib/ZStreamException.java b/src/com/jcraft/jzlib/ZStreamException.java
new file mode 100644
index 000000000..424b74b78
--- /dev/null
+++ b/src/com/jcraft/jzlib/ZStreamException.java
@@ -0,0 +1,44 @@
+/* -*-mode:java; c-basic-offset:2; -*- */
+/*
+Copyright (c) 2000,2001,2002,2003 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 com.jcraft.jzlib;
+
+public class ZStreamException extends java.io.IOException {
+  public ZStreamException() {
+    super();
+  }
+  public ZStreamException(String s) {
+    super(s);
+  }
+}