xref: /AOO41X/main/xmlhelp/source/cxxhelp/provider/inputstream.cxx (revision cdf0e10c4e3984b49a9502b011690b615761d4a3)

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 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
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 *
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 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * 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
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * 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>
 * for a copy of the LGPLv3 License.
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_xmlhelp.hxx"
#include "inputstream.hxx"


using namespace chelp;
using namespace com::sun::star;
using namespace com::sun::star::ucb;



XInputStream_impl::XInputStream_impl( const rtl::OUString& aUncPath )
    : m_bIsOpen( false ),
      m_aFile( aUncPath )
{
	m_bIsOpen = ( osl::FileBase::E_None == m_aFile.open( OpenFlag_Read ) );
}


XInputStream_impl::~XInputStream_impl()
{
	closeInput();
}


bool SAL_CALL XInputStream_impl::CtorSuccess()
{
	return m_bIsOpen;
};


uno::Any SAL_CALL
XInputStream_impl::queryInterface(
	const uno::Type& rType )
	throw( uno::RuntimeException)
{
	uno::Any aRet = cppu::queryInterface( rType,
										  SAL_STATIC_CAST( io::XInputStream*,this ),
										  SAL_STATIC_CAST( io::XSeekable*,this ) );
	return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
}


void SAL_CALL
XInputStream_impl::acquire(
	void )
	throw()
{
	OWeakObject::acquire();
}


void SAL_CALL
XInputStream_impl::release(
	void )
	throw()
{
	OWeakObject::release();
}



sal_Int32 SAL_CALL
XInputStream_impl::readBytes(
			     uno::Sequence< sal_Int8 >& aData,
			     sal_Int32 nBytesToRead )
	throw( io::NotConnectedException,
		   io::BufferSizeExceededException,
		   io::IOException,
		   uno::RuntimeException)
{
	if( ! m_bIsOpen )
        throw io::IOException();

    aData.realloc(nBytesToRead);
    //TODO! translate memory exhaustion (if it were detectable...) into
    // io::BufferSizeExceededException

	sal_uInt64 nrc;
	m_aFile.read( aData.getArray(),sal_uInt64(nBytesToRead),nrc );

    // Shrink aData in case we read less than nBytesToRead (XInputStream
    // documentation does not tell whether this is required, and I do not know
    // if any code relies on this, so be conservative---SB):
    if (nrc != sal::static_int_cast<sal_uInt64>( nBytesToRead) )
        aData.realloc(sal_Int32(nrc));
	return ( sal_Int32 ) nrc;
}

sal_Int32 SAL_CALL
XInputStream_impl::readSomeBytes(
	uno::Sequence< sal_Int8 >& aData,
	sal_Int32 nMaxBytesToRead )
	throw( io::NotConnectedException,
		   io::BufferSizeExceededException,
		   io::IOException,
		   uno::RuntimeException)
{
	return readBytes( aData,nMaxBytesToRead );
}


void SAL_CALL
XInputStream_impl::skipBytes(
	sal_Int32 nBytesToSkip )
	throw( io::NotConnectedException,
		   io::BufferSizeExceededException,
		   io::IOException,
		   uno::RuntimeException)
{
	m_aFile.setPos( osl_Pos_Current, sal_uInt64( nBytesToSkip ) );
}


sal_Int32 SAL_CALL
XInputStream_impl::available(
	void )
	throw( io::NotConnectedException,
		   io::IOException,
		   uno::RuntimeException)
{
	return 0;
}


void SAL_CALL
XInputStream_impl::closeInput(
	void )
	throw( io::NotConnectedException,
		   io::IOException,
		   uno::RuntimeException )
{
	if( m_bIsOpen )
	{
		osl::FileBase::RC err = m_aFile.close();
		if( err != osl::FileBase::E_None )
			throw io::IOException();
		m_bIsOpen = false;
	}
}


void SAL_CALL
XInputStream_impl::seek(
	sal_Int64 location )
	throw( lang::IllegalArgumentException,
		   io::IOException,
		   uno::RuntimeException )
{
	if( location < 0 )
		throw lang::IllegalArgumentException();
	if( osl::FileBase::E_None != m_aFile.setPos( Pos_Absolut, sal_uInt64( location ) ) )
		throw io::IOException();
}


sal_Int64 SAL_CALL
XInputStream_impl::getPosition(
	void )
	throw( io::IOException,
		   uno::RuntimeException )
{
	sal_uInt64 uPos;
	if( osl::FileBase::E_None != m_aFile.getPos( uPos ) )
		throw io::IOException();
	return sal_Int64( uPos );
}

sal_Int64 SAL_CALL
XInputStream_impl::getLength(
	void )
	throw( io::IOException,
		   uno::RuntimeException )
{
	osl::FileBase::RC	err;
	sal_uInt64			uCurrentPos, uEndPos;

	err = m_aFile.getPos( uCurrentPos );
	if( err != osl::FileBase::E_None )
		throw io::IOException();

	err = m_aFile.setPos( Pos_End, 0 );
	if( err != osl::FileBase::E_None )
		throw io::IOException();

	err = m_aFile.getPos( uEndPos );
	if( err != osl::FileBase::E_None )
		throw io::IOException();

	err = m_aFile.setPos( Pos_Absolut, uCurrentPos );
	if( err != osl::FileBase::E_None )
		throw io::IOException();
	else
		return sal_Int64( uEndPos );
}