1 files changed, 125 insertions, 0 deletions
diff --git a/package/source/zipapi/ByteGrabber.cxx b/package/source/zipapi/ByteGrabber.cxx
new file mode 100644
index 000000000..b58a7087f
--- /dev/null
+++ b/package/source/zipapi/ByteGrabber.cxx
@@ -0,0 +1,125 @@
+/* -*- 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 .
+ */
+
+#include <ByteGrabber.hxx>
+#include <sal/log.hxx>
+#include <com/sun/star/io/IOException.hpp>
+#include <com/sun/star/io/XSeekable.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+
+using namespace ::com::sun::star;
+
+#if OSL_DEBUG_LEVEL > 0
+#define THROW_WHERE SAL_WHERE
+#else
+#define THROW_WHERE ""
+#endif
+
+/** ByteGrabber implements the >> operators on an XOutputStream. This is
+ *  potentially quite slow and may need to be optimised
+ */
+
+ByteGrabber::ByteGrabber(uno::Reference  < io::XInputStream > const & xIstream)
+: xStream(xIstream)
+, xSeek (xIstream, uno::UNO_QUERY )
+, aSequence ( 4 )
+{
+    pSequence = aSequence.getArray();
+}
+
+ByteGrabber::~ByteGrabber()
+{
+}
+
+void ByteGrabber::setInputStream (const uno::Reference < io::XInputStream >& xNewStream)
+{
+    std::scoped_lock aGuard( m_aMutex );
+    xStream = xNewStream;
+    xSeek.set(xNewStream, uno::UNO_QUERY);
+}
+
+// XInputStream chained
+sal_Int32 ByteGrabber::readBytes( uno::Sequence< sal_Int8 >& aData,
+                                        sal_Int32 nBytesToRead )
+{
+    std::scoped_lock aGuard( m_aMutex );
+    return xStream->readBytes(aData, nBytesToRead );
+}
+
+// XSeekable chained...
+void ByteGrabber::seek( sal_Int64 location )
+{
+    std::scoped_lock aGuard( m_aMutex );
+    if (!xSeek.is() )
+        throw io::IOException(THROW_WHERE );
+
+    sal_Int64 nLen = xSeek->getLength();
+    if ( location < 0 || location > nLen )
+        throw lang::IllegalArgumentException(THROW_WHERE, uno::Reference< uno::XInterface >(), 1 );
+    xSeek->seek( location );
+}
+
+sal_Int64 ByteGrabber::getPosition(  )
+{
+    std::scoped_lock aGuard( m_aMutex );
+    if (!xSeek.is() )
+        throw io::IOException(THROW_WHERE );
+
+    return xSeek->getPosition();
+}
+
+sal_Int64 ByteGrabber::getLength(  )
+{
+    std::scoped_lock aGuard( m_aMutex );
+    if (!xSeek.is() )
+        throw io::IOException(THROW_WHERE );
+
+    return xSeek->getLength();
+}
+
+sal_uInt16 ByteGrabber::ReadUInt16()
+{
+    std::scoped_lock aGuard( m_aMutex );
+
+    if (xStream->readBytes(aSequence, 2) != 2)
+        return 0;
+
+    pSequence = aSequence.getConstArray();
+    return static_cast <sal_uInt16>
+           ( (pSequence[0] & 0xFF)
+          | (pSequence[1] & 0xFF) << 8);
+}
+
+sal_uInt32 ByteGrabber::ReadUInt32()
+{
+    std::scoped_lock aGuard( m_aMutex );
+
+    if (xStream->readBytes(aSequence, 4) != 4)
+        return 0;
+
+    pSequence = aSequence.getConstArray();
+    return static_cast < sal_uInt32 >
+            ( (pSequence[0] & 0xFF)
+          | ( pSequence[1] & 0xFF ) << 8
+          | ( pSequence[2] & 0xFF ) << 16
+          | ( pSequence[3] & 0xFF ) << 24 );
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */