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diff --git a/pwmanager/pwmanager/compressgzip.h b/pwmanager/pwmanager/compressgzip.h
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+/***************************************************************************
+ *                                                                         *
+ *   copyright (C) 2003, 2004 by Michael Buesch                            *
+ *   email: mbuesch@freenet.de                                             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License version 2        *
+ *   as published by the Free Software Foundation.                         *
+ *                                                                         *
+ ***************************************************************************/
+
+/***************************************************************************
+ * copyright (C) 2004 by Ulf Schenk
+ * This file is originaly based on version 1.0.1 of pwmanager
+ * and was modified to run on embedded devices that run microkde
+ *
+ * $Id$
+ **************************************************************************/  
+
+#ifndef COMPRESSGZIP_H
+#define COMPRESSGZIP_H
+
+#include <string>
+using std::string;
+
+/** gzip compression */
+class CompressGzip
+{
+public:
+	CompressGzip() {}
+
+	/** compress the string d */
+	bool compress(string *d);
+	/** decompress the string d */
+	bool decompress(string *d);
+
+protected:
+	/** calculates the length of the dest-buffer
+	  * for compress() using the size of the source-buffer
+	  */
+	unsigned int calcCompressDestLen(unsigned int sourceLen)
+			{ return (sourceLen + (sourceLen / 100 / 10 + 12)); }
+	/** calculates the length of the dest-buffer
+	  * for decompress() using the size of the source-buffer
+	  */
+	unsigned int calcDecompressDestLen(unsigned int sourceLen)
+			{ return (sourceLen * 2); }
+};
+
+#endif