1 files changed, 123 insertions, 0 deletions
diff --git a/unotools/source/streaming/streamhelper.cxx b/unotools/source/streaming/streamhelper.cxx
new file mode 100644
index 000000000..b5f07e6a6
--- /dev/null
+++ b/unotools/source/streaming/streamhelper.cxx
@@ -0,0 +1,123 @@
+/* -*- 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 <sal/config.h>
+
+#include <com/sun/star/io/BufferSizeExceededException.hpp>
+#include <com/sun/star/io/IOException.hpp>
+#include <com/sun/star/io/NotConnectedException.hpp>
+#include <o3tl/safeint.hxx>
+#include <unotools/streamhelper.hxx>
+
+namespace utl
+{
+
+sal_Int32 SAL_CALL OInputStreamHelper::readBytes(css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
+{
+    if (!m_xLockBytes.is())
+        throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
+
+    if (nBytesToRead < 0)
+        throw css::io::BufferSizeExceededException(OUString(), static_cast<css::uno::XWeak*>(this));
+
+    std::scoped_lock aGuard( m_aMutex );
+    if (aData.getLength() < nBytesToRead)
+        aData.realloc(nBytesToRead);
+
+    std::size_t nRead(0);
+    ErrCode nError = m_xLockBytes->ReadAt(m_nActPos, static_cast<void*>(aData.getArray()), nBytesToRead, &nRead);
+    m_nActPos += nRead;
+
+    if (nError != ERRCODE_NONE)
+        throw css::io::IOException(OUString(), static_cast<css::uno::XWeak*>(this));
+
+    // adjust sequence if data read is lower than the desired data
+    if (nRead < o3tl::make_unsigned(aData.getLength()))
+        aData.realloc( nRead );
+
+    return nRead;
+}
+
+void SAL_CALL OInputStreamHelper::seek( sal_Int64 location )
+{
+    std::scoped_lock aGuard( m_aMutex );
+    m_nActPos = location;
+}
+
+sal_Int64 SAL_CALL OInputStreamHelper::getPosition(  )
+{
+    return m_nActPos;
+}
+
+sal_Int64 SAL_CALL OInputStreamHelper::getLength(  )
+{
+    if (!m_xLockBytes.is())
+        return 0;
+
+    std::scoped_lock aGuard( m_aMutex );
+    SvLockBytesStat aStat;
+    m_xLockBytes->Stat( &aStat );
+    return aStat.nSize;
+}
+
+sal_Int32 SAL_CALL OInputStreamHelper::readSomeBytes(css::uno::Sequence< sal_Int8 >& aData,
+                                                     sal_Int32 nMaxBytesToRead)
+{
+    // read all data desired
+    return readBytes(aData, nMaxBytesToRead);
+}
+
+void SAL_CALL OInputStreamHelper::skipBytes(sal_Int32 nBytesToSkip)
+{
+    std::scoped_lock aGuard( m_aMutex );
+    if (!m_xLockBytes.is())
+        throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
+
+    if (nBytesToSkip < 0)
+        throw css::io::BufferSizeExceededException(OUString(), static_cast<css::uno::XWeak*>(this));
+
+    m_nActPos += nBytesToSkip;
+}
+
+sal_Int32 SAL_CALL OInputStreamHelper::available()
+{
+    std::scoped_lock aGuard( m_aMutex );
+    if (!m_xLockBytes.is())
+        throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
+
+    return m_nAvailable;
+}
+
+void SAL_CALL OInputStreamHelper::closeInput()
+{
+    std::scoped_lock aGuard( m_aMutex );
+    if (!m_xLockBytes.is())
+        throw css::io::NotConnectedException(OUString(), static_cast<css::uno::XWeak*>(this));
+
+    m_xLockBytes = nullptr;
+}
+
+void SAL_CALL OInputStreamHelper::acquire() SAL_NOEXCEPT
+{
+    cppu::WeakImplHelper<css::io::XInputStream, css::io::XSeekable>::acquire();
+}
+
+} // namespace utl
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */