xref: /AOO41X/main/package/source/zipapi/ByteGrabber.cxx (revision cdf0e10c4e3984b49a9502b011690b615761d4a3)

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
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 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_package.hxx"
#include <ByteGrabber.hxx>
#include <com/sun/star/io/XSeekable.hpp>
#include <com/sun/star/io/XInputStream.hpp>

using namespace ::com::sun::star;

/** ByteGrabber implements the >> operators on an XOutputStream. This is
 *  potentially quite slow and may need to be optimised
 */

ByteGrabber::ByteGrabber(uno::Reference  < io::XInputStream > xIstream)
: xStream(xIstream)
, xSeek (xIstream, uno::UNO_QUERY )
, aSequence ( 4 )
{
	pSequence = aSequence.getArray();
}

ByteGrabber::~ByteGrabber()
{
}

void ByteGrabber::setInputStream (uno::Reference < io::XInputStream > xNewStream)
{
    ::osl::MutexGuard aGuard( m_aMutex );
	xStream = xNewStream;
	xSeek = uno::Reference < io::XSeekable > (xNewStream, uno::UNO_QUERY);
}

// XInputStream chained
sal_Int32 SAL_CALL ByteGrabber::readBytes( uno::Sequence< sal_Int8 >& aData,
										sal_Int32 nBytesToRead )
	throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
{
    ::osl::MutexGuard aGuard( m_aMutex );
	return xStream->readBytes(aData, nBytesToRead );
}

// XSeekable chained...
sal_Int64 SAL_CALL ByteGrabber::seek( sal_Int64 location )
	throw(lang::IllegalArgumentException, io::IOException, uno::RuntimeException)
{
    ::osl::MutexGuard aGuard( m_aMutex );
	if (xSeek.is() )
	{
		sal_Int64 nLen = xSeek->getLength();
		if ( location < 0 || location > nLen )
			throw lang::IllegalArgumentException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >(), 1 );
		if (location > nLen )
			location = nLen;
		xSeek->seek( location );
		return location;
	}
	else
		throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
}

sal_Int64 SAL_CALL ByteGrabber::getPosition(  )
		throw(io::IOException, uno::RuntimeException)
{
    ::osl::MutexGuard aGuard( m_aMutex );
	if (xSeek.is() )
		return xSeek->getPosition();
	else
		throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
}

sal_Int64 SAL_CALL ByteGrabber::getLength(  )
		throw(io::IOException, uno::RuntimeException)
{
    ::osl::MutexGuard aGuard( m_aMutex );
	if (xSeek.is() )
		return xSeek->getLength();
	else
		throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
}

ByteGrabber& ByteGrabber::operator >> (sal_Int8& rInt8)
{
    ::osl::MutexGuard aGuard( m_aMutex );
	if (xStream->readBytes(aSequence,1) != 1)
		rInt8 = 0;
	else
		rInt8 = aSequence[0] & 0xFF;
	return *this;
}

ByteGrabber& ByteGrabber::operator >> (sal_Int16& rInt16)
{
    ::osl::MutexGuard aGuard( m_aMutex );
	if (xStream->readBytes ( aSequence, 2) != 2)
		rInt16 = 0;
	else
	{
		pSequence = aSequence.getConstArray();
		rInt16 = static_cast <sal_Int16>
			   ( (pSequence[0] & 0xFF)
		      | (pSequence[1] & 0xFF) << 8);
	}
	return *this;
}

ByteGrabber& ByteGrabber::operator >> (sal_Int32& rInt32)
{
    ::osl::MutexGuard aGuard( m_aMutex );

	if (xStream->readBytes(aSequence, 4) != 4)
		rInt32 = 0;
	else
	{
		pSequence = aSequence.getConstArray();
		rInt32 = static_cast < sal_Int32 >
			    ( (pSequence[0] & 0xFF)
		      | ( pSequence[1] & 0xFF ) << 8
		      | ( pSequence[2] & 0xFF ) << 16
		      | ( pSequence[3] & 0xFF ) << 24 );
	}
	return *this;
}

ByteGrabber& ByteGrabber::operator >> (sal_uInt8& rInt8)
{
    ::osl::MutexGuard aGuard( m_aMutex );

	if (xStream->readBytes(aSequence,1) != 1)
		rInt8 = 0;
	else
		rInt8 = static_cast < sal_uInt8 > (aSequence[0] & 0xFF );
	return *this;
}
ByteGrabber& ByteGrabber::operator >> (sal_uInt16& rInt16)
{
    ::osl::MutexGuard aGuard( m_aMutex );

	if (xStream->readBytes(aSequence, 2) != 2)
		rInt16 = 0;
	else
	{
		pSequence = aSequence.getConstArray();
		rInt16 = static_cast <sal_uInt16>
			   ( (pSequence[0] & 0xFF)
		      | (pSequence[1] & 0xFF) << 8);
	}
	return *this;
}
ByteGrabber& ByteGrabber::operator >> (sal_uInt32& ruInt32)
{
    ::osl::MutexGuard aGuard( m_aMutex );

	if (xStream->readBytes(aSequence, 4) != 4)
		ruInt32 = 0;
	else
	{
		pSequence = aSequence.getConstArray();
		ruInt32 = static_cast < sal_uInt32 >
			    ( (pSequence[0] & 0xFF)
		      | ( pSequence[1] & 0xFF ) << 8
		      | ( pSequence[2] & 0xFF ) << 16
		      | ( pSequence[3] & 0xFF ) << 24 );
	}
	return *this;
}