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diff --git a/package/source/zipapi/MemoryByteGrabber.hxx b/package/source/zipapi/MemoryByteGrabber.hxx
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+++ b/package/source/zipapi/MemoryByteGrabber.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef INCLUDED_PACKAGE_SOURCE_ZIPAPI_MEMORYBYTEGRABBER_HXX
+#define INCLUDED_PACKAGE_SOURCE_ZIPAPI_MEMORYBYTEGRABBER_HXX
+
+#include <com/sun/star/uno/Sequence.h>
+
+class MemoryByteGrabber final
+{
+    const sal_Int8 *mpBuffer;
+    sal_Int32 mnCurrent, mnEnd;
+public:
+    MemoryByteGrabber ( const css::uno::Sequence < sal_Int8 > & rBuffer )
+    : mpBuffer ( rBuffer.getConstArray() )
+    , mnCurrent ( 0 )
+    , mnEnd ( rBuffer.getLength() )
+    {
+    }
+    MemoryByteGrabber(css::uno::Sequence<sal_Int8> &&) = delete;
+
+    const sal_Int8 * getCurrentPos () const { return mpBuffer + mnCurrent; }
+
+    sal_Int32 remainingSize() const { return mnEnd - mnCurrent; }
+
+    // XInputStream chained
+
+    /// @throws css::io::NotConnectedException
+    /// @throws css::io::BufferSizeExceededException
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    void skipBytes( sal_Int32 nBytesToSkip )
+    {
+        mnCurrent += nBytesToSkip;
+    }
+
+    // XSeekable chained...
+    sal_Int16 ReadInt16()
+    {
+        if (mnCurrent + 2 > mnEnd )
+            return 0;
+        sal_Int16 nInt16  =   mpBuffer[mnCurrent++] & 0xFF;
+        nInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
+        return nInt16;
+    }
+
+    sal_Int16 ReadUInt16()
+    {
+        if (mnCurrent + 2 > mnEnd )
+            return 0;
+        sal_uInt16 nInt16  =  mpBuffer[mnCurrent++] & 0xFF;
+        nInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
+        return nInt16;
+    }
+
+    sal_Int32 ReadInt32()
+    {
+        if (mnCurrent + 4 > mnEnd )
+            return 0;
+
+        sal_Int32 nInt32  =   mpBuffer[mnCurrent++] & 0xFF;
+        nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8;
+        nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 16;
+        nInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 24;
+        return nInt32;
+    }
+
+    sal_uInt32 ReadUInt32()
+    {
+        if (mnCurrent + 4 > mnEnd )
+            return 0;
+
+        sal_uInt32 nInt32  =   mpBuffer [mnCurrent++] & 0xFF;
+        nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8;
+        nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 16;
+        nInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 24;
+        return nInt32;
+    }
+
+    sal_uInt64 ReadUInt64()
+    {
+        if (mnCurrent + 8 > mnEnd)
+            return 0;
+
+        sal_uInt64 nInt64 = mpBuffer[mnCurrent++] & 0xFF;
+        nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 8;
+        nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 16;
+        nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 24;
+        nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 32;
+        nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 40;
+        nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 48;
+        nInt64 |= static_cast<sal_Int64>(mpBuffer[mnCurrent++] & 0xFF) << 56;
+        return nInt64;
+    }
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */