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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/.
*
* 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 <ByteGrabber.hxx>
#include <sal/log.hxx>
#include <com/sun/star/io/XSeekable.hpp>
#include <com/sun/star/io/XInputStream.hpp>
using namespace ::com::sun::star;
#if OSL_DEBUG_LEVEL > 0
#define THROW_WHERE SAL_WHERE
#else
#define THROW_WHERE ""
#endif
/** ByteGrabber implements the >> operators on an XOutputStream. This is
* potentially quite slow and may need to be optimised
*/
ByteGrabber::ByteGrabber(uno::Reference < io::XInputStream > const & xIstream)
: xStream(xIstream)
, xSeek (xIstream, uno::UNO_QUERY )
, aSequence ( 4 )
{
pSequence = aSequence.getArray();
}
ByteGrabber::~ByteGrabber()
{
}
void ByteGrabber::setInputStream (const uno::Reference < io::XInputStream >& xNewStream)
{
::osl::MutexGuard aGuard( m_aMutex );
xStream = xNewStream;
xSeek.set(xNewStream, uno::UNO_QUERY);
}
// XInputStream chained
sal_Int32 ByteGrabber::readBytes( uno::Sequence< sal_Int8 >& aData,
sal_Int32 nBytesToRead )
{
::osl::MutexGuard aGuard( m_aMutex );
return xStream->readBytes(aData, nBytesToRead );
}
// XSeekable chained...
void ByteGrabber::seek( sal_Int64 location )
{
::osl::MutexGuard aGuard( m_aMutex );
if (!xSeek.is() )
throw io::IOException(THROW_WHERE );
sal_Int64 nLen = xSeek->getLength();
if ( location < 0 || location > nLen )
throw lang::IllegalArgumentException(THROW_WHERE, uno::Reference< uno::XInterface >(), 1 );
if (location > nLen )
location = nLen;
xSeek->seek( location );
}
sal_Int64 ByteGrabber::getPosition( )
{
::osl::MutexGuard aGuard( m_aMutex );
if (!xSeek.is() )
throw io::IOException(THROW_WHERE );
return xSeek->getPosition();
}
sal_Int64 ByteGrabber::getLength( )
{
::osl::MutexGuard aGuard( m_aMutex );
if (!xSeek.is() )
throw io::IOException(THROW_WHERE );
return xSeek->getLength();
}
sal_uInt16 ByteGrabber::ReadUInt16()
{
::osl::MutexGuard aGuard( m_aMutex );
if (xStream->readBytes(aSequence, 2) != 2)
return 0;
pSequence = aSequence.getConstArray();
return static_cast <sal_uInt16>
( (pSequence[0] & 0xFF)
| (pSequence[1] & 0xFF) << 8);
}
sal_uInt32 ByteGrabber::ReadUInt32()
{
::osl::MutexGuard aGuard( m_aMutex );
if (xStream->readBytes(aSequence, 4) != 4)
return 0;
pSequence = aSequence.getConstArray();
return static_cast < sal_uInt32 >
( (pSequence[0] & 0xFF)
| ( pSequence[1] & 0xFF ) << 8
| ( pSequence[2] & 0xFF ) << 16
| ( pSequence[3] & 0xFF ) << 24 );
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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