--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/jcraft/jzlib/ZInputStream.java	Thu May 22 10:41:19 2014 -0700
@@ -0,0 +1,160 @@
+/* -*-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);  //(bufsize<z.avail_out ? bufsize : z.avail_out));
+
+                if (z.avail_in == -1) {
+                    z.avail_in = 0;
+                    nomoreinput = true;
+                }
+            }
+
+            if (compress)
+                err = z.deflate(flush);
+            else
+                err = z.inflate(flush);
+
+            if (nomoreinput && (err == JZlib.Z_BUF_ERROR))
+                return (-1);
+
+            if (err != JZlib.Z_OK && err != JZlib.Z_STREAM_END)
+                throw new ZStreamException((compress ? "de" : "in") + "flating: " + z.msg);
+
+            if ((nomoreinput || err == JZlib.Z_STREAM_END) && (z.avail_out == len))
+                return (-1);
+        }
+        while (z.avail_out == len && err == JZlib.Z_OK);
+
+        //System.err.print("("+(len-z.avail_out)+")");
+        return (len - z.avail_out);
+    }
+
+    public long skip(long n) throws IOException {
+        int len = 512;
+
+        if (n < len)
+            len = (int)n;
+
+        byte[] tmp = new byte[len];
+        return ((long)read(tmp));
+    }
+
+    public int getFlushMode() {
+        return (flush);
+    }
+
+    public void setFlushMode(int flush) {
+        this.flush = flush;
+    }
+
+    /**
+     * 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 close() throws IOException {
+        in.close();
+    }
+}