1 files changed, 247 insertions, 0 deletions
diff --git a/comphelper/source/streaming/seqstream.cxx b/comphelper/source/streaming/seqstream.cxx
new file mode 100644
index 000000000..1f37a7967
--- /dev/null
+++ b/comphelper/source/streaming/seqstream.cxx
@@ -0,0 +1,247 @@
+/* -*- 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/NotConnectedException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <comphelper/seqstream.hxx>
+
+#include <osl/diagnose.h>
+
+namespace comphelper
+{
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::io;
+using namespace ::com::sun::star::uno;
+using namespace ::osl;
+
+
+
+
+SequenceInputStream::SequenceInputStream(
+    css::uno::Sequence<sal_Int8> const & rData)
+:   m_aData(rData)
+,   m_nPos(0)
+{
+}
+
+// checks if closed, returns available size, not mutex-protected
+
+inline sal_Int32 SequenceInputStream::avail()
+{
+    if (m_nPos == -1)
+        throw NotConnectedException(OUString(), *this);
+
+    return m_aData.getLength() - m_nPos;
+}
+
+// css::io::XInputStream
+
+sal_Int32 SAL_CALL SequenceInputStream::readBytes( Sequence<sal_Int8>& aData, sal_Int32 nBytesToRead )
+{
+    if (nBytesToRead < 0)
+        throw BufferSizeExceededException(OUString(),*this);
+
+    std::scoped_lock aGuard( m_aMutex );
+
+    sal_Int32 nAvail = avail();
+
+    if (nAvail < nBytesToRead)
+        nBytesToRead = nAvail;
+
+    aData.realloc(nBytesToRead);
+    memcpy(aData.getArray(), m_aData.getConstArray() + m_nPos, nBytesToRead);
+    m_nPos += nBytesToRead;
+
+    return nBytesToRead;
+}
+
+sal_Int32 SequenceInputStream::readSomeBytes( sal_Int8* pData, sal_Int32 nBytesToRead )
+{
+    if (nBytesToRead < 0)
+        throw BufferSizeExceededException(OUString(),*this);
+
+    std::scoped_lock aGuard( m_aMutex );
+
+    sal_Int32 nAvail = avail();
+
+    if (nAvail < nBytesToRead)
+        nBytesToRead = nAvail;
+
+    memcpy(pData, m_aData.getConstArray() + m_nPos, nBytesToRead);
+    m_nPos += nBytesToRead;
+
+    return nBytesToRead;
+}
+
+sal_Int64 SAL_CALL SequenceInputStream::getSomething( const css::uno::Sequence< sal_Int8 >& rIdentifier )
+{
+    if (rIdentifier == comphelper::ByteReader::getUnoTunnelId())
+        return reinterpret_cast<sal_Int64>(static_cast<comphelper::ByteReader*>(this));
+    return 0;
+}
+
+sal_Int32 SAL_CALL SequenceInputStream::readSomeBytes( Sequence<sal_Int8>& aData, sal_Int32 nMaxBytesToRead )
+{
+    // all data is available at once
+    return readBytes(aData, nMaxBytesToRead);
+}
+
+
+void SAL_CALL SequenceInputStream::skipBytes( sal_Int32 nBytesToSkip )
+{
+    if (nBytesToSkip < 0)
+        throw BufferSizeExceededException(OUString(),*this);
+
+    std::scoped_lock aGuard( m_aMutex );
+
+    sal_Int32 nAvail = avail();
+
+    if (nAvail < nBytesToSkip)
+        nBytesToSkip = nAvail;
+
+    m_nPos += nBytesToSkip;
+}
+
+
+sal_Int32 SAL_CALL SequenceInputStream::available(  )
+{
+    std::scoped_lock aGuard( m_aMutex );
+
+    return avail();
+}
+
+
+void SAL_CALL SequenceInputStream::closeInput(  )
+{
+    std::scoped_lock aGuard( m_aMutex );
+
+    if (m_nPos == -1)
+        throw NotConnectedException(OUString(), *this);
+
+    m_nPos = -1;
+}
+
+void SAL_CALL SequenceInputStream::seek( sal_Int64 location )
+{
+    if ( location > m_aData.getLength() || location < 0 || location > SAL_MAX_INT32 )
+        throw IllegalArgumentException("bad location", static_cast<cppu::OWeakObject*>(this), 1);
+    std::scoped_lock aGuard( m_aMutex );
+    m_nPos = static_cast<sal_Int32>(location);
+}
+
+sal_Int64 SAL_CALL SequenceInputStream::getPosition()
+{
+    std::scoped_lock aGuard( m_aMutex );
+    return m_nPos;
+}
+
+sal_Int64 SAL_CALL SequenceInputStream::getLength(  )
+{
+    std::scoped_lock aGuard( m_aMutex );
+    return m_aData.getLength();
+}
+
+
+OSequenceOutputStream::OSequenceOutputStream(Sequence< sal_Int8 >& _rSeq, double _nResizeFactor, sal_Int32 _nMinimumResize)
+    :m_rSequence(_rSeq)
+    ,m_nResizeFactor(_nResizeFactor)
+    ,m_nMinimumResize(_nMinimumResize)
+    ,m_nSize(0) // starting at position 0
+    ,m_bConnected(true)
+{
+    OSL_ENSURE(m_nResizeFactor > 1, "OSequenceOutputStream::OSequenceOutputStream : invalid resize factor !");
+
+    if (m_nResizeFactor <= 1)
+        m_nResizeFactor = 1.3;
+}
+
+
+void SAL_CALL OSequenceOutputStream::writeBytes( const Sequence< sal_Int8 >& _rData )
+{
+    std::scoped_lock aGuard(m_aMutex);
+    if (!m_bConnected)
+        throw NotConnectedException();
+
+    // ensure the sequence has enough space left
+    if (m_nSize + _rData.getLength() > m_rSequence.getLength())
+    {
+        sal_Int32 nCurrentLength = m_rSequence.getLength();
+        sal_Int32 nNewLength = static_cast< sal_Int32 >(
+            nCurrentLength * m_nResizeFactor);
+
+        if (m_nMinimumResize > nNewLength - nCurrentLength)
+            // we have a minimum so it's not too inefficient for small sequences and small write requests
+            nNewLength = nCurrentLength + m_nMinimumResize;
+
+        if (nNewLength < m_nSize + _rData.getLength())
+        {   // it's not enough... the data would not fit
+
+            // let's take the double amount of the length of the data to be written, as the next write
+            // request could be as large as this one
+            sal_Int32 nNewGrowth = _rData.getLength() * 2;
+            nNewLength = nCurrentLength + nNewGrowth;
+        }
+
+        // round it off to the next multiple of 4...
+        nNewLength = (nNewLength + 3) / 4 * 4;
+
+        m_rSequence.realloc(nNewLength);
+    }
+
+    OSL_ENSURE(m_rSequence.getLength() >= m_nSize + _rData.getLength(),
+        "ooops ... the realloc algorithm seems to be wrong :( !");
+
+    memcpy(m_rSequence.getArray() + m_nSize, _rData.getConstArray(), _rData.getLength());
+    m_nSize += _rData.getLength();
+}
+
+
+void SAL_CALL OSequenceOutputStream::flush(  )
+{
+    std::scoped_lock aGuard(m_aMutex);
+    if (!m_bConnected)
+        throw NotConnectedException();
+
+    // cut the sequence to the real size
+    m_rSequence.realloc(m_nSize);
+}
+
+void OSequenceOutputStream::finalizeOutput()
+{
+    // cut the sequence to the real size
+    m_rSequence.realloc(m_nSize);
+    // and don't allow any further accesses
+    m_bConnected = false;
+}
+
+void SAL_CALL OSequenceOutputStream::closeOutput()
+{
+    std::scoped_lock aGuard(m_aMutex);
+    if (!m_bConnected)
+        throw NotConnectedException();
+
+    finalizeOutput();
+}
+
+} // namespace comphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */