From ed5640d8b587fbcfed7dd7967f3de04b37a76f26 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:06:44 +0200 Subject: Adding upstream version 4:7.4.7. Signed-off-by: Daniel Baumann --- comphelper/source/streaming/seqstream.cxx | 247 ++++++++++++++++++++++++++++++ 1 file changed, 247 insertions(+) create mode 100644 comphelper/source/streaming/seqstream.cxx (limited to 'comphelper/source/streaming/seqstream.cxx') 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 + +#include +#include +#include +#include + +#include + +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 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& 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(static_cast(this)); + return 0; +} + +sal_Int32 SAL_CALL SequenceInputStream::readSomeBytes( Sequence& 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(this), 1); + std::scoped_lock aGuard( m_aMutex ); + m_nPos = static_cast(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: */ -- cgit v1.2.3