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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:51:28 +0000 |
commit | 940b4d1848e8c70ab7642901a68594e8016caffc (patch) | |
tree | eb72f344ee6c3d9b80a7ecc079ea79e9fba8676d /connectivity/source/drivers/firebird/Clob.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-1ad18e38974bb28c3d98d0be8f7d8c18fc56de29.tar.xz libreoffice-1ad18e38974bb28c3d98d0be8f7d8c18fc56de29.zip |
Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'connectivity/source/drivers/firebird/Clob.cxx')
-rw-r--r-- | connectivity/source/drivers/firebird/Clob.cxx | 155 |
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: */ |