--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/myVncClient/ZlibInStream.java	Sun Apr 24 16:55:29 2011 +0900
@@ -0,0 +1,116 @@
+package myVncClient;
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// A ZlibInStream reads from a zlib.io.InputStream
+//
+
+public class ZlibInStream extends InStream {
+
+	static final int defaultBufSize = 16384;
+
+	public ZlibInStream(int bufSize_) {
+		bufSize = bufSize_;
+		b = new byte[bufSize];
+		ptr = end = ptrOffset = 0;
+		inflater = new java.util.zip.Inflater();
+	}
+
+	public ZlibInStream() {
+		this(defaultBufSize);
+	}
+
+	public void setUnderlying(InStream is, int bytesIn_) {
+		underlying = is;
+		bytesIn = bytesIn_;
+		ptr = end = 0;
+	}
+
+	public void reset() throws Exception {
+		ptr = end = 0;
+		if (underlying == null)
+			return;
+
+		while (bytesIn > 0) {
+			decompress();
+			end = 0; // throw away any data
+		}
+		underlying = null;
+	}
+
+	public int pos() {
+		return ptrOffset + ptr;
+	}
+
+	protected int overrun(int itemSize, int nItems) throws Exception {
+		if (itemSize > bufSize)
+			throw new Exception("ZlibInStream overrun: max itemSize exceeded");
+		if (underlying == null)
+			throw new Exception("ZlibInStream overrun: no underlying stream");
+
+		if (end - ptr != 0)
+			System.arraycopy(b, ptr, b, 0, end - ptr);
+
+		ptrOffset += ptr;
+		end -= ptr;
+		ptr = 0;
+
+		while (end < itemSize) {
+			decompress();
+		}
+
+		if (itemSize * nItems > end)
+			nItems = end / itemSize;
+
+		return nItems;
+	}
+
+	// decompress() calls the decompressor once. Note that this won't
+	// necessarily generate any output data - it may just consume some input
+	// data. Returns false if wait is false and we would block on the underlying
+	// stream.
+
+	private void decompress() throws Exception {
+		try {
+			underlying.check(1);
+			int avail_in = underlying.getend() - underlying.getptr();
+			if (avail_in > bytesIn)
+				avail_in = bytesIn;
+
+			if (inflater.needsInput()) {
+				inflater.setInput(underlying.getbuf(), underlying.getptr(),
+						avail_in);
+			}
+			int n = inflater.inflate(b, end, bufSize - end);
+			end += n;
+			if (inflater.needsInput()) {
+				bytesIn -= avail_in;
+				underlying.setptr(underlying.getptr() + avail_in);
+			}
+		} catch (java.util.zip.DataFormatException e) {
+			throw new Exception("ZlibInStream: inflate failed");
+		}
+	}
+
+	private InStream underlying;
+	private int bufSize;
+	private int ptrOffset; 
+	private java.util.zip.Inflater inflater;
+	private int bytesIn;
+}