--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/jcraft/jzlib/ZStream.java	Thu May 22 10:41:19 2014 -0700
@@ -0,0 +1,222 @@
+/* -*-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_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 MAX_MEM_LEVEL = 9;
+
+    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;
+
+    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;
+    }
+}