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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:06:44 +0000 |
commit | ed5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch) | |
tree | 7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /oox/source/helper/binarystreambase.cxx | |
parent | Initial commit. (diff) | |
download | libreoffice-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 'oox/source/helper/binarystreambase.cxx')
-rw-r--r-- | oox/source/helper/binarystreambase.cxx | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/oox/source/helper/binarystreambase.cxx b/oox/source/helper/binarystreambase.cxx new file mode 100644 index 000000000..1e3ef11ae --- /dev/null +++ b/oox/source/helper/binarystreambase.cxx @@ -0,0 +1,146 @@ +/* -*- 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 <oox/helper/binarystreambase.hxx> +#include <oox/helper/helper.hxx> + +#include <com/sun/star/io/XSeekable.hpp> +#include <tools/diagnose_ex.h> + +namespace oox { + +using namespace ::com::sun::star::io; +using namespace ::com::sun::star::uno; + +BinaryStreamBase::~BinaryStreamBase() +{ +} + +sal_Int64 BinaryStreamBase::getRemaining() const +{ + // do not use isSeekable(), implementations may provide stream position and size even if not seekable + sal_Int64 nPos = tell(); + sal_Int64 nLen = size(); + return ((nPos >= 0) && (nLen >= 0)) ? ::std::max< sal_Int64 >( nLen - nPos, 0 ) : -1; +} + +void BinaryStreamBase::alignToBlock( sal_Int32 nBlockSize, sal_Int64 nAnchorPos ) +{ + sal_Int64 nStrmPos = tell(); + // nothing to do, if stream is at anchor position + if( mbSeekable && (0 <= nAnchorPos) && (nAnchorPos != nStrmPos) && (nBlockSize > 1) ) + { + // prevent modulo with negative arguments... + sal_Int64 nSkipSize = (nAnchorPos < nStrmPos) ? + (nBlockSize - ((nStrmPos - nAnchorPos - 1) % nBlockSize) - 1) : + ((nAnchorPos - nStrmPos) % nBlockSize); + seek( nStrmPos + nSkipSize ); + } +} + +BinaryXSeekableStream::BinaryXSeekableStream( const Reference< XSeekable >& rxSeekable ) : + BinaryStreamBase( rxSeekable.is() ), + mxSeekable( rxSeekable ) +{ +} + +BinaryXSeekableStream::~BinaryXSeekableStream() +{ +} + +sal_Int64 BinaryXSeekableStream::size() const +{ + if( mxSeekable.is() ) try + { + return mxSeekable->getLength(); + } + catch( Exception& ) + { + TOOLS_WARN_EXCEPTION( "oox", "BinaryXSeekableStream::size" ); + } + return -1; +} + +sal_Int64 BinaryXSeekableStream::tell() const +{ + if( mxSeekable.is() ) try + { + return mxSeekable->getPosition(); + } + catch( Exception& ) + { + TOOLS_WARN_EXCEPTION( "oox", "BinaryXSeekableStream::tell" ); + } + return -1; +} + +void BinaryXSeekableStream::seek( sal_Int64 nPos ) +{ + if( mxSeekable.is() ) try + { + mbEof = false; + mxSeekable->seek( nPos ); + } + catch( Exception& ) + { + mbEof = true; + } +} + +void BinaryXSeekableStream::close() +{ + mxSeekable.clear(); + mbEof = true; +} + +SequenceSeekableStream::SequenceSeekableStream( const StreamDataSequence& rData ) : + BinaryStreamBase( true ), + mpData( &rData ), + mnPos( 0 ) +{ +} + +sal_Int64 SequenceSeekableStream::size() const +{ + return mpData ? mpData->getLength() : -1; +} + +sal_Int64 SequenceSeekableStream::tell() const +{ + return mpData ? mnPos : -1; +} + +void SequenceSeekableStream::seek( sal_Int64 nPos ) +{ + if( mpData ) + { + mnPos = getLimitedValue< sal_Int32, sal_Int64 >( nPos, 0, mpData->getLength() ); + mbEof = mnPos != nPos; + } +} + +void SequenceSeekableStream::close() +{ + mpData = nullptr; + mbEof = true; +} + +} // namespace oox + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |