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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /connectivity/source/drivers/firebird/Clob.cxx
parentInitial commit. (diff)
downloadlibreoffice-upstream.tar.xz
libreoffice-upstream.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--connectivity/source/drivers/firebird/Clob.cxx141
1 files changed, 141 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..dde050ede
--- /dev/null
+++ b/connectivity/source/drivers/firebird/Clob.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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 "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;
+ std::vector<char> aSegmentBytes;
+ do
+ {
+ bLastSegmRead = m_aBlob->readOneSegment( aSegmentBytes );
+ OUString sSegment(aSegmentBytes.data(), aSegmentBytes.size(), 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)
+{
+ if (nPosition < 1) // XClob is indexed from 1
+ throw lang::IllegalArgumentException("nPosition < 1", *this, 0);
+ --nPosition; // make 0-based
+
+ if (nLength < 0)
+ throw lang::IllegalArgumentException("nLength < 0", *this, 0);
+
+ 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;
+ std::vector<char> aSegmentBytes;
+
+ for (;;)
+ {
+ bool bLastRead = m_aBlob->readOneSegment( aSegmentBytes );
+ // TODO: handle possible case of split UTF-8 character
+ OUString sSegment(aSegmentBytes.data(), aSegmentBytes.size(), RTL_TEXTENCODING_UTF8);
+
+ // skip irrelevant parts
+ if (sSegment.getLength() < nPosition)
+ {
+ if (bLastRead)
+ throw lang::IllegalArgumentException("nPosition out of range", *this, 0);
+ nPosition -= sSegment.getLength();
+ continue;
+ }
+
+ // Getting here for the first time, nPosition may be > 0, meaning copy start offset.
+ // This also handles sSegment.getLength() == nPosition case, including nLength == 0.
+ const sal_Int32 nCharsToCopy = std::min<sal_Int32>(sSegment.getLength() - nPosition,
+ nLength - sSegmentBuffer.getLength());
+ sSegmentBuffer.append(sSegment.subView(nPosition, nCharsToCopy));
+ if (sSegmentBuffer.getLength() == nLength)
+ return sSegmentBuffer.makeStringAndClear();
+
+ assert(sSegmentBuffer.getLength() < nLength);
+
+ if (bLastRead)
+ throw lang::IllegalArgumentException("out of range", *this, 0);
+
+ nPosition = 0; // No offset after first append
+ }
+}
+
+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("Clob::positionOfClob", *this);
+ return 0;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */