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/* -*- 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: */
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