127 lines
3.7 KiB
C++
127 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <ByteGrabber.hxx>
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#include <sal/log.hxx>
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#include <com/sun/star/io/IOException.hpp>
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#include <com/sun/star/io/XSeekable.hpp>
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#include <com/sun/star/io/XInputStream.hpp>
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#include <com/sun/star/lang/IllegalArgumentException.hpp>
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using namespace ::com::sun::star;
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#if OSL_DEBUG_LEVEL > 0
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#define THROW_WHERE SAL_WHERE
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#else
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#define THROW_WHERE ""
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#endif
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/** ByteGrabber implements the >> operators on an XOutputStream. This is
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* potentially quite slow and may need to be optimised
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*/
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ByteGrabber::ByteGrabber(uno::Reference < io::XInputStream > const & xIstream)
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: xStream(xIstream)
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, xSeek (xIstream, uno::UNO_QUERY )
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{
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mpByteReader = dynamic_cast<comphelper::ByteReader*>(xStream.get());
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assert(mpByteReader);
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}
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ByteGrabber::~ByteGrabber()
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{
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}
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void ByteGrabber::setInputStream (const uno::Reference < io::XInputStream >& xNewStream)
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{
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xStream = xNewStream;
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xSeek.set(xNewStream, uno::UNO_QUERY);
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mpByteReader = dynamic_cast<comphelper::ByteReader*>(xStream.get());
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assert(mpByteReader);
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}
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sal_Int32 ByteGrabber::readBytes( sal_Int8* aData,
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sal_Int32 nBytesToRead )
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{
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return mpByteReader->readSomeBytes(aData, nBytesToRead );
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}
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// XSeekable chained...
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void ByteGrabber::seek( sal_Int64 location )
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{
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if (!xSeek.is() )
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throw io::IOException(THROW_WHERE );
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xSeek->seek( location );
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}
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sal_Int64 ByteGrabber::getPosition( )
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{
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if (!xSeek.is() )
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throw io::IOException(THROW_WHERE );
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return xSeek->getPosition();
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}
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sal_Int64 ByteGrabber::getLength( )
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{
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if (!xSeek.is() )
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throw io::IOException(THROW_WHERE );
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return xSeek->getLength();
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}
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sal_uInt16 ByteGrabber::ReadUInt16()
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{
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if (mpByteReader->readSomeBytes(maBuffer.data(), 2) != 2)
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return 0;
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return static_cast <sal_uInt16>
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( (maBuffer[0] & 0xFF)
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| (maBuffer[1] & 0xFF) << 8);
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}
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sal_uInt32 ByteGrabber::ReadUInt32()
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{
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if (mpByteReader->readSomeBytes(maBuffer.data(), 4) != 4)
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return 0;
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return static_cast < sal_uInt32 >
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( (maBuffer[0] & 0xFF)
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| ( maBuffer[1] & 0xFF ) << 8
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| ( maBuffer[2] & 0xFF ) << 16
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| ( maBuffer[3] & 0xFF ) << 24 );
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}
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sal_uInt64 ByteGrabber::ReadUInt64()
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{
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if (mpByteReader->readSomeBytes(maBuffer.data(), 8) != 8)
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return 0;
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return static_cast<sal_uInt64>(maBuffer[0] & 0xFF)
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| static_cast<sal_uInt64>(maBuffer[1] & 0xFF) << 8
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| static_cast<sal_uInt64>(maBuffer[2] & 0xFF) << 16
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| static_cast<sal_uInt64>(maBuffer[3] & 0xFF) << 24
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| static_cast<sal_uInt64>(maBuffer[4] & 0xFF) << 32
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| static_cast<sal_uInt64>(maBuffer[5] & 0xFF) << 40
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| static_cast<sal_uInt64>(maBuffer[6] & 0xFF) << 48
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| static_cast<sal_uInt64>(maBuffer[7] & 0xFF) << 56;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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