/**************************************************************
 * 
 * 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_comphelper.hxx"
#include <comphelper/oslfile2streamwrap.hxx>

#include <algorithm>

namespace comphelper
{
	using namespace osl;

//------------------------------------------------------------------
OSLInputStreamWrapper::OSLInputStreamWrapper( File& _rFile )
				 :m_pFile(&_rFile)
				 ,m_bFileOwner(sal_False)
{
}

//------------------------------------------------------------------
OSLInputStreamWrapper::OSLInputStreamWrapper( File* pStream, sal_Bool bOwner )
				 :m_pFile( pStream )
				 ,m_bFileOwner( bOwner )
{
}

//------------------------------------------------------------------
OSLInputStreamWrapper::~OSLInputStreamWrapper()
{
	if( m_bFileOwner )
		delete m_pFile;
}

//------------------------------------------------------------------------------
sal_Int32 SAL_CALL OSLInputStreamWrapper::readBytes(staruno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
				throw( stario::NotConnectedException, stario::BufferSizeExceededException, staruno::RuntimeException )
{
	if (!m_pFile)
		throw stario::NotConnectedException(::rtl::OUString(), static_cast<staruno::XWeak*>(this));

	if (nBytesToRead < 0)
		throw stario::BufferSizeExceededException(::rtl::OUString(),static_cast<staruno::XWeak*>(this));

	::osl::MutexGuard aGuard( m_aMutex );

	aData.realloc(nBytesToRead);

	sal_uInt64 nRead = 0;
	FileBase::RC eError = m_pFile->read((void*)aData.getArray(), nBytesToRead, nRead);
	if (eError != FileBase::E_None)
		throw stario::BufferSizeExceededException(::rtl::OUString(),static_cast<staruno::XWeak*>(this));

	// Wenn gelesene Zeichen < MaxLength, staruno::Sequence anpassen
	if (nRead < (sal_uInt32)nBytesToRead)
		aData.realloc( sal::static_int_cast< sal_Int32 >(nRead) );

	return sal::static_int_cast< sal_Int32 >(nRead);
}

//------------------------------------------------------------------------------
sal_Int32 SAL_CALL OSLInputStreamWrapper::readSomeBytes(staruno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead) throw( stario::NotConnectedException, stario::BufferSizeExceededException, staruno::RuntimeException )
{
	if (!m_pFile)
		throw stario::NotConnectedException(::rtl::OUString(), static_cast<staruno::XWeak*>(this));

	if (nMaxBytesToRead < 0)
		throw stario::BufferSizeExceededException(::rtl::OUString(),static_cast<staruno::XWeak*>(this));

	/*
	  if (m_pFile->IsEof())
	  {
	  aData.realloc(0);
	  return 0;
	  }
	  else
	*/
	return readBytes(aData, nMaxBytesToRead);
}

//------------------------------------------------------------------------------
void SAL_CALL OSLInputStreamWrapper::skipBytes(sal_Int32 nBytesToSkip) throw( stario::NotConnectedException, stario::BufferSizeExceededException, staruno::RuntimeException )
{
	::osl::MutexGuard aGuard( m_aMutex );
	if (!m_pFile)
		throw stario::NotConnectedException(::rtl::OUString(), static_cast<staruno::XWeak*>(this));

	sal_uInt64 nCurrentPos;
	m_pFile->getPos(nCurrentPos);

	sal_uInt64 nNewPos = nCurrentPos + nBytesToSkip;
	FileBase::RC eError = m_pFile->setPos(osl_Pos_Absolut, nNewPos);
	if (eError != FileBase::E_None)
	{
		throw stario::NotConnectedException(::rtl::OUString(), static_cast<staruno::XWeak*>(this));
	}

#ifdef DBG_UTIL
	m_pFile->getPos(nCurrentPos);
//  volatile int dummy = 0;						 // to take a look at last changes ;-)
#endif
}

//------------------------------------------------------------------------------
sal_Int32 SAL_CALL OSLInputStreamWrapper::available() throw( stario::NotConnectedException, staruno::RuntimeException )
{
	::osl::MutexGuard aGuard( m_aMutex );
	if (!m_pFile)
		throw stario::NotConnectedException(::rtl::OUString(), static_cast<staruno::XWeak*>(this));

	sal_uInt64 nPos;
	FileBase::RC eError = m_pFile->getPos(nPos);
	if (eError != FileBase::E_None)
		throw stario::NotConnectedException(::rtl::OUString(), static_cast<staruno::XWeak*>(this));

	sal_uInt64 nDummy = 0;
	eError = m_pFile->setPos(Pos_End, nDummy);
	if (eError != FileBase::E_None)
	   throw stario::NotConnectedException(::rtl::OUString(),static_cast<staruno::XWeak*>(this));

	sal_uInt64 nAvailable;
	eError = m_pFile->getPos(nAvailable);
	if (eError != FileBase::E_None)
	   throw stario::NotConnectedException(::rtl::OUString(),static_cast<staruno::XWeak*>(this));

	nAvailable = nAvailable - nPos;
	eError = m_pFile->setPos(Pos_Absolut, nPos);
	if (eError != FileBase::E_None)
	   throw stario::NotConnectedException(::rtl::OUString(),static_cast<staruno::XWeak*>(this));
	return sal::static_int_cast< sal_Int32 >(
        std::max(nAvailable, sal::static_int_cast< sal_uInt64 >(SAL_MAX_INT32)));
}

//------------------------------------------------------------------------------
void SAL_CALL OSLInputStreamWrapper::closeInput() throw( stario::NotConnectedException, staruno::RuntimeException )
{
	if (!m_pFile)
		throw stario::NotConnectedException(::rtl::OUString(), static_cast<staruno::XWeak*>(this));

	m_pFile->close();
	if (m_bFileOwner)
		delete m_pFile;

	m_pFile = NULL;
}

/*************************************************************************/
// stario::XOutputStream
//------------------------------------------------------------------------------
void SAL_CALL OSLOutputStreamWrapper::writeBytes(const staruno::Sequence< sal_Int8 >& aData) throw( stario::NotConnectedException, stario::BufferSizeExceededException, staruno::RuntimeException )
{
	sal_uInt64 nWritten;
	FileBase::RC eError = rFile.write(aData.getConstArray(),aData.getLength(), nWritten);
	if (eError != FileBase::E_None
        || nWritten != sal::static_int_cast< sal_uInt32 >(aData.getLength()))
	{
		throw stario::BufferSizeExceededException(::rtl::OUString(),static_cast<staruno::XWeak*>(this));
	}
}

//------------------------------------------------------------------
void SAL_CALL OSLOutputStreamWrapper::flush() throw( stario::NotConnectedException, stario::BufferSizeExceededException, staruno::RuntimeException )
{
}

//------------------------------------------------------------------
void SAL_CALL OSLOutputStreamWrapper::closeOutput() throw( stario::NotConnectedException, stario::BufferSizeExceededException, staruno::RuntimeException )
{
	rFile.close();
}

} // namespace comphelper