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diff --git a/xmlhelp/source/cxxhelp/inc/util/Decompressor.hxx b/xmlhelp/source/cxxhelp/inc/util/Decompressor.hxx
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@@ -0,0 +1,151 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+#ifndef _XMLSEARCH_UTIL_DECOMPRESSOR_HXX_
+#define _XMLSEARCH_UTIL_DECOMPRESSOR_HXX_
+
+#ifndef INCLUDED_STL_VECTOR
+#include <vector>
+#define INCLUDED_STL_VECTOR
+#endif
+#include <excep/XmlSearchExceptions.hxx>
+#include <util/RandomAccessStream.hxx>
+
+
+namespace xmlsearch {
+
+    namespace util {
+
+
+        class CompressorIterator;
+
+
+        class Decompressor
+        {
+        public:
+
+            Decompressor()
+                : toRead_( 0 ),
+                  path_( 0 )
+            {
+            }
+
+            virtual ~Decompressor() { }
+
+            virtual sal_Int32 getNextByte() = 0;
+
+            virtual void initReading()
+            {
+                toRead_ = 0;
+            }
+
+        private:
+
+            static const sal_Int32 BitsInByte;
+            static const sal_Int32 NBits;
+
+            sal_Int32 readByte_, toRead_, path_;
+        };
+
+
+
+
+        class StreamDecompressor
+            : public Decompressor
+        {
+        public:
+
+            StreamDecompressor( RandomAccessStream* in )
+                : in_( in )
+            {
+            }
+
+            ~StreamDecompressor() { }
+
+
+            virtual sal_Int32 getNextByte();
+
+        private:
+
+            RandomAccessStream* in_;
+
+        };
+
+
+
+        class ByteArrayDecompressor
+            : public Decompressor
+        {
+        public:
+
+            ByteArrayDecompressor( sal_Int32 arrayL,sal_Int8* array,sal_Int32 index )
+            {
+                initReading(array,arrayL,index);
+            }
+
+
+            ~ByteArrayDecompressor() { }
+
+            sal_Int32 bytesRead()
+            {
+                return index_ - index0_;
+            }
+
+
+            sal_Int32 getNextByte() throw( xmlsearch::excep::XmlSearchException )
+            {
+                if( arrayL_ <= index_ )
+                    throw  xmlsearch::excep::XmlSearchException(
+                        rtl::OUString::createFromAscii( "ByteArrayDecompressor->getNextByte()" ) );
+                return array_[index_++] & 0xFF;
+            }
+
+
+        private:
+
+            sal_Int32  arrayL_;
+            sal_Int8   *array_;
+
+            sal_Int32  index_,index0_;
+
+            using xmlsearch::util::Decompressor::initReading;
+            void initReading( sal_Int8* array,sal_Int32 arrayL,sal_Int32 index )
+            {
+                arrayL_ = arrayL;
+                array_ = array;
+                index_ = index0_ = index;
+                Decompressor::initReading();
+            }
+
+        };
+
+
+    }
+
+}
+
+
+#endif