/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/

 
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_ucb.hxx"
#include "filinpstr.hxx"
#ifndef _FILERROR_HXX_
#include "filerror.hxx"
#endif
#include "shell.hxx"
#include "prov.hxx"


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


XInputStream_impl::XInputStream_impl( shell* pMyShell,const rtl::OUString& aUncPath, sal_Bool bLock )
	: m_pMyShell( pMyShell ),
	  m_xProvider( pMyShell->m_pProvider ),
      m_bLock( bLock ),
	  m_aFile( aUncPath ),
	  m_nErrorCode( TASKHANDLER_NO_ERROR ),
	  m_nMinorErrorCode( TASKHANDLER_NO_ERROR )
{
    sal_uInt32 nFlags = OpenFlag_Read;
    if ( !bLock )
        nFlags |= OpenFlag_NoLock;

	osl::FileBase::RC err = m_aFile.open( nFlags );
	if( err != osl::FileBase::E_None )
	{
		m_nIsOpen = false;
		m_aFile.close();
	
		m_nErrorCode = TASKHANDLING_OPEN_FOR_INPUTSTREAM;
		m_nMinorErrorCode = err;
	}
	else
		m_nIsOpen = true;
}


XInputStream_impl::~XInputStream_impl()
{
	try
	{
		closeInput();
	}
    catch (io::IOException const &)
    {
        OSL_ENSURE(false, "unexpected situation");
    }
    catch (uno::RuntimeException const &)
    {
        OSL_ENSURE(false, "unexpected situation");
    }	
}


sal_Int32 SAL_CALL XInputStream_impl::CtorSuccess()
{
	return m_nErrorCode;
};


sal_Int32 SAL_CALL XInputStream_impl::getMinorError()
{
	return m_nMinorErrorCode;
}


//////////////////////////////////////////////////////////////////////////////////////////
//  XTypeProvider
//////////////////////////////////////////////////////////////////////////////////////////


XTYPEPROVIDER_IMPL_3( XInputStream_impl,
					  lang::XTypeProvider,
					  io::XSeekable,
					  io::XInputStream )


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( lang::XTypeProvider*,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_nIsOpen ) throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );

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

	sal_uInt64 nrc(0);
	if(m_aFile.read( aData.getArray(),sal_uInt64(nBytesToRead),nrc )
       != osl::FileBase::E_None)
        throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );

    // 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 (sal::static_int_cast<sal_Int32>(nrc) != 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_nIsOpen )
	{
		osl::FileBase::RC err = m_aFile.close();
		if( err != osl::FileBase::E_None )
			throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
		m_nIsOpen = false;
	}
}


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


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( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
	return sal_Int64( uPos );
}

sal_Int64 SAL_CALL
XInputStream_impl::getLength(
	void )
	throw( io::IOException,
		   uno::RuntimeException )
{
	sal_uInt64 uEndPos;
	if ( m_aFile.getSize(uEndPos) != osl::FileBase::E_None )
		throw io::IOException( ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( OSL_LOG_PREFIX ) ), uno::Reference< uno::XInterface >() );
	else
		return sal_Int64( uEndPos );
}