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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* 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
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* 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.
*
************************************************************************/
#ifndef _COMPHELPER_SEQSTREAM_HXX
#define _COMPHELPER_SEQSTREAM_HXX
#include <com/sun/star/uno/Sequence.hxx>
#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/io/XOutputStream.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <osl/mutex.hxx>
#include <cppuhelper/implbase1.hxx>
#include <cppuhelper/implbase2.hxx>
#include "comphelper/comphelperdllapi.h"
namespace comphelper
{
typedef ::com::sun::star::uno::Sequence<sal_Int8> ByteSequence;
//==================================================================
// SequenceInputStream
// stream for reading data from a sequence of bytes
//==================================================================
class COMPHELPER_DLLPUBLIC SequenceInputStream
: public ::cppu::WeakImplHelper2< ::com::sun::star::io::XInputStream, ::com::sun::star::io::XSeekable >
{
::osl::Mutex m_aMutex;
ByteSequence m_aData;
sal_Int32 m_nPos;
public:
SequenceInputStream(const ByteSequence& rData);
// com::sun::star::io::XInputStream
virtual sal_Int32 SAL_CALL readBytes( ::com::sun::star::uno::Sequence<sal_Int8>& aData, sal_Int32 nBytesToRead )
throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
virtual sal_Int32 SAL_CALL readSomeBytes( ::com::sun::star::uno::Sequence<sal_Int8>& aData, sal_Int32 nMaxBytesToRead )
throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
virtual sal_Int32 SAL_CALL available( )
throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
virtual void SAL_CALL closeInput( )
throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
virtual void SAL_CALL seek( sal_Int64 location ) throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
virtual sal_Int64 SAL_CALL getPosition( ) throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
virtual sal_Int64 SAL_CALL getLength( ) throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
private:
inline sal_Int32 avail();
};
typedef ::cppu::WeakImplHelper1< ::com::sun::star::io::XOutputStream > OSequenceOutputStream_Base;
class OSequenceOutputStream : public OSequenceOutputStream_Base
{
protected:
::com::sun::star::uno::Sequence< sal_Int8 >& m_rSequence;
double m_nResizeFactor;
sal_Int32 m_nMinimumResize;
sal_Int32 m_nMaximumResize;
sal_Int32 m_nSize;
// the size of the virtual stream. This is not the size of the sequence, but the number of bytes written
// into the stream at a given moment.
sal_Bool m_bConnected;
// closeOutput has been called ?
::osl::Mutex m_aMutex;
protected:
~OSequenceOutputStream() { if (m_bConnected) closeOutput(); }
public:
/** constructs the object. Everything written into the stream through the XOutputStream methods will be forwarded
to the sequence, reallocating it if neccessary. Writing will start at offset 0 within the sequence.
@param _rSeq a reference to the sequence which will be used for output.
The caller is responsible for taking care of the lifetime of the stream
object and the sequence. If you're in doubt about this, use <code>closeOutput</code>
before destroying the sequence
@param _nResizeFactor the factor which is used for resizing the sequence when neccessary. In every
resize step, the new sequence size will be calculated by multiplying the current
size with this factor, rounded off to the next multiple of 4.
@param _nMinimumResize the minmal number of bytes which is additionally allocated on resizing
@param _nMaximumResize as the growth of the stream size is exponential, you may want to specify a
maxmimum amount of memory which the sequence will grow by. If -1 is used,
no limit is applied
@see closeOutput
*/
OSequenceOutputStream(
::com::sun::star::uno::Sequence< sal_Int8 >& _rSeq,
double _nResizeFactor = 1.3,
sal_Int32 _nMinimumResize = 128,
sal_Int32 _nMaximumResize = -1
);
/// same as XOutputStream::writeBytes (as expected :)
virtual void SAL_CALL writeBytes( const ::com::sun::star::uno::Sequence< sal_Int8 >& aData ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
/// this is a dummy in this implementation, no buffering is used
virtual void SAL_CALL flush( ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
/** closes the output stream. In the case of this class, this means that the sequence used for writing is
resized to the really used size and not used any further, every subsequent call to one of the XOutputStream
methods will throw a <code>NotConnectedException</code>.
*/
virtual void SAL_CALL closeOutput( ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
};
} // namespace comphelper
#endif //_COMPHELPER_SEQSTREAM_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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