--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/com/jcraft/jzlib/JZlib.java	Thu Dec 03 11:23:55 2015 -0800
@@ -0,0 +1,92 @@
+/* -*-mode:java; c-basic-offset:2; -*- */
+/*
+Copyright (c) 2011 ymnk, JCraft,Inc. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  1. Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+
+  2. Redistributions in binary form must reproduce the above copyright 
+     notice, this list of conditions and the following disclaimer in 
+     the documentation and/or other materials provided with the distribution.
+
+  3. The names of the authors may not be used to endorse or promote products
+     derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
+INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/*
+ * This program is based on zlib-1.1.3, so all credit should go authors
+ * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)
+ * and contributors of zlib.
+ */
+
+package com.jcraft.jzlib;
+
+final public class JZlib{
+  private static final String version="1.1.0";
+  public static String version(){return version;}
+
+  static final public int MAX_WBITS=15;        // 32K LZ77 window
+  static final public int DEF_WBITS=MAX_WBITS;
+
+  public enum WrapperType {
+    NONE, ZLIB, GZIP, ANY
+  }
+
+  public static final WrapperType W_NONE = WrapperType.NONE;
+  public static final WrapperType W_ZLIB = WrapperType.ZLIB;
+  public static final WrapperType W_GZIP = WrapperType.GZIP;
+  public static final WrapperType W_ANY = WrapperType.ANY;
+
+  // compression levels
+  static final public int Z_NO_COMPRESSION=0;
+  static final public int Z_BEST_SPEED=1;
+  static final public int Z_BEST_COMPRESSION=9;
+  static final public int Z_DEFAULT_COMPRESSION=(-1);
+
+  // compression strategy
+  static final public int Z_FILTERED=1;
+  static final public int Z_HUFFMAN_ONLY=2;
+  static final public int Z_DEFAULT_STRATEGY=0;
+
+  static final public int Z_NO_FLUSH=0;
+  static final public int Z_PARTIAL_FLUSH=1;
+  static final public int Z_SYNC_FLUSH=2;
+  static final public int Z_FULL_FLUSH=3;
+  static final public int Z_FINISH=4;
+
+  static final public int Z_OK=0;
+  static final public int Z_STREAM_END=1;
+  static final public int Z_NEED_DICT=2;
+  static final public int Z_ERRNO=-1;
+  static final public int Z_STREAM_ERROR=-2;
+  static final public int Z_DATA_ERROR=-3;
+  static final public int Z_MEM_ERROR=-4;
+  static final public int Z_BUF_ERROR=-5;
+  static final public int Z_VERSION_ERROR=-6;
+
+  // The three kinds of block type
+  static final public byte Z_BINARY = 0;
+  static final public byte Z_ASCII = 1;
+  static final public byte Z_UNKNOWN = 2;
+
+  public static long adler32_combine(long adler1, long adler2, long len2){
+    return Adler32.combine(adler1, adler2, len2);
+  }
+
+  public static long crc32_combine(long crc1, long crc2, long len2){
+    return CRC32.combine(crc1, crc2, len2);
+  }
+}