1 files changed, 155 insertions, 0 deletions
diff --git a/connectivity/source/drivers/firebird/Clob.cxx b/connectivity/source/drivers/firebird/Clob.cxx
new file mode 100644
index 000000000..2038dfc11
--- /dev/null
+++ b/connectivity/source/drivers/firebird/Clob.cxx
@@ -0,0 +1,155 @@
+/* -*- 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/.
+ */
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include "Clob.hxx"
+#include "Blob.hxx"
+
+#include <connectivity/CommonTools.hxx>
+#include <connectivity/dbexception.hxx>
+
+using namespace ::connectivity::firebird;
+
+using namespace ::osl;
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::io;
+using namespace ::com::sun::star::sdbc;
+using namespace ::com::sun::star::uno;
+
+Clob::Clob(isc_db_handle* pDatabaseHandle,
+           isc_tr_handle* pTransactionHandle,
+           ISC_QUAD const & aBlobID):
+    Clob_BASE(m_aMutex),
+    m_aBlob(new connectivity::firebird::Blob(pDatabaseHandle, pTransactionHandle, aBlobID)),
+    m_nCharCount(-1)
+{
+}
+
+void SAL_CALL Clob::disposing()
+{
+    m_aBlob->dispose();
+    m_aBlob.clear();
+    Clob_BASE::disposing();
+}
+
+sal_Int64 SAL_CALL Clob::length()
+{
+    MutexGuard aGuard(m_aMutex);
+    checkDisposed(Clob_BASE::rBHelper.bDisposed);
+
+    if( m_nCharCount >= 0 )
+        return m_nCharCount;
+    m_nCharCount = 0;
+
+    // Read each segment, and calculate it's size by interpreting it as a
+    // character stream. Assume that no characters are split by the segments.
+    bool bLastSegmRead = false;
+    do
+    {
+        uno::Sequence < sal_Int8 > aSegmentBytes;
+        bLastSegmRead = m_aBlob->readOneSegment( aSegmentBytes );
+        OUString sSegment ( reinterpret_cast< char *>( aSegmentBytes.getArray() ),
+                            aSegmentBytes.getLength(),
+                            RTL_TEXTENCODING_UTF8 );
+
+        if( !bLastSegmRead)
+            m_nCharCount += sSegment.getLength();
+    }while( !bLastSegmRead );
+
+    m_aBlob->closeInput(); // reset position
+    return m_nCharCount;
+}
+
+OUString SAL_CALL Clob::getSubString(sal_Int64 nPosition,
+                                               sal_Int32 nLength)
+{
+    MutexGuard aGuard(m_aMutex);
+    checkDisposed(Clob_BASE::rBHelper.bDisposed);
+    // TODO do not reset position if it is not necessary
+    m_aBlob->closeInput(); // reset position
+
+    OUStringBuffer sSegmentBuffer;
+    sal_Int64 nActPos = 1;
+    sal_Int32 nActLen = 0;
+
+    // skip irrelevant parts
+    while( nActPos < nPosition )
+    {
+        uno::Sequence < sal_Int8 > aSegmentBytes;
+        bool bLastRead = m_aBlob->readOneSegment( aSegmentBytes );
+        if( bLastRead )
+            throw lang::IllegalArgumentException("nPosition out of range", *this, 0);
+
+        OUString sSegment ( reinterpret_cast< char *>( aSegmentBytes.getArray() ),
+                            aSegmentBytes.getLength(),
+                            RTL_TEXTENCODING_UTF8 );
+        sal_Int32 nStrLen = sSegment.getLength();
+        nActPos += nStrLen;
+        if( nActPos > nPosition )
+        {
+            sal_Int32 nCharsToCopy = static_cast<sal_Int32>(nActPos - nPosition);
+            if( nCharsToCopy > nLength )
+                nCharsToCopy = nLength;
+            // append relevant part of first segment
+            sSegmentBuffer.append( std::u16string_view(sSegment).substr(0, nCharsToCopy) );
+            nActLen += sSegmentBuffer.getLength();
+        }
+    }
+
+    // read nLength characters
+    while( nActLen < nLength )
+    {
+        uno::Sequence < sal_Int8 > aSegmentBytes;
+        bool bLastRead = m_aBlob->readOneSegment( aSegmentBytes );
+
+        OUString sSegment ( reinterpret_cast< char *>( aSegmentBytes.getArray() ),
+                            aSegmentBytes.getLength(),
+                            RTL_TEXTENCODING_UTF8 );
+        sal_Int32 nStrLen = sSegment.getLength();
+        if( nActLen + nStrLen > nLength )
+            sSegmentBuffer.append(std::u16string_view(sSegment).substr(0, nLength - nActLen));
+        else
+            sSegmentBuffer.append(sSegment);
+        nActLen += nStrLen;
+
+        if( bLastRead && nActLen < nLength )
+            throw lang::IllegalArgumentException("out of range", *this, 0);
+    }
+
+    return sSegmentBuffer.makeStringAndClear();
+}
+
+uno::Reference< XInputStream > SAL_CALL  Clob::getCharacterStream()
+{
+    MutexGuard aGuard(m_aMutex);
+    checkDisposed(Clob_BASE::rBHelper.bDisposed);
+
+    return m_aBlob->getBinaryStream();
+}
+
+sal_Int64 SAL_CALL Clob::position(const OUString& /*rPattern*/,
+                                   sal_Int32 /*nStart*/)
+{
+    ::dbtools::throwFeatureNotImplementedSQLException("Clob::position", *this);
+    return 0;
+}
+
+sal_Int64 SAL_CALL Clob::positionOfClob(const Reference <XClob >& /*rPattern*/,
+                                         sal_Int64 /*aStart*/)
+{
+    ::dbtools::throwFeatureNotImplementedSQLException("Blob::positionOfBlob", *this);
+    return 0;
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */