b9337e22ce
see https://gerrit.libreoffice.org/#/c/3367/ and Change-Id: I00c96fa77d04b33a6f8c8cd3490dfcd9bdc9e84a for details Change-Id: I199a75bc4042af20817265d5ef85b1134a96ff5a
139 lines
7.4 KiB
C++
139 lines
7.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef _COMPHELPER_SEQSTREAM_HXX
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#define _COMPHELPER_SEQSTREAM_HXX
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#include <com/sun/star/uno/Sequence.hxx>
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#include <com/sun/star/uno/Reference.hxx>
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#include <com/sun/star/io/XInputStream.hpp>
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#include <com/sun/star/io/XOutputStream.hpp>
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#include <com/sun/star/io/XSeekable.hpp>
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#include <osl/mutex.hxx>
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#include <cppuhelper/implbase1.hxx>
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#include <cppuhelper/implbase2.hxx>
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#include "comphelper/comphelperdllapi.h"
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namespace comphelper
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{
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typedef ::com::sun::star::uno::Sequence<sal_Int8> ByteSequence;
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//==================================================================
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// SequenceInputStream
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// stream for reading data from a sequence of bytes
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//==================================================================
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class COMPHELPER_DLLPUBLIC SequenceInputStream
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: public ::cppu::WeakImplHelper2< ::com::sun::star::io::XInputStream, ::com::sun::star::io::XSeekable >
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{
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::osl::Mutex m_aMutex;
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ByteSequence m_aData;
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sal_Int32 m_nPos;
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public:
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SequenceInputStream(const ByteSequence& rData);
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// com::sun::star::io::XInputStream
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virtual sal_Int32 SAL_CALL readBytes( ::com::sun::star::uno::Sequence<sal_Int8>& aData, sal_Int32 nBytesToRead )
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throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
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::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual sal_Int32 SAL_CALL readSomeBytes( ::com::sun::star::uno::Sequence<sal_Int8>& aData, sal_Int32 nMaxBytesToRead )
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throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
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::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
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throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
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::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual sal_Int32 SAL_CALL available( )
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throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual void SAL_CALL closeInput( )
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throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual void SAL_CALL seek( sal_Int64 location ) throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual sal_Int64 SAL_CALL getPosition( ) throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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virtual sal_Int64 SAL_CALL getLength( ) throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
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private:
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inline sal_Int32 avail();
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};
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typedef ::cppu::WeakImplHelper1< ::com::sun::star::io::XOutputStream > OSequenceOutputStream_Base;
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class OSequenceOutputStream : public OSequenceOutputStream_Base
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{
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protected:
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::com::sun::star::uno::Sequence< sal_Int8 >& m_rSequence;
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double m_nResizeFactor;
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sal_Int32 m_nMinimumResize;
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sal_Int32 m_nMaximumResize;
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sal_Int32 m_nSize;
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// the size of the virtual stream. This is not the size of the sequence, but the number of bytes written
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// into the stream at a given moment.
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sal_Bool m_bConnected;
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// closeOutput has been called ?
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::osl::Mutex m_aMutex;
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protected:
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~OSequenceOutputStream() { if (m_bConnected) closeOutput(); }
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public:
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/** constructs the object. Everything written into the stream through the XOutputStream methods will be forwarded
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to the sequence, reallocating it if neccessary. Writing will start at offset 0 within the sequence.
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@param _rSeq a reference to the sequence which will be used for output.
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The caller is responsible for taking care of the lifetime of the stream
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object and the sequence. If you're in doubt about this, use <code>closeOutput</code>
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before destroying the sequence
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@param _nResizeFactor the factor which is used for resizing the sequence when neccessary. In every
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resize step, the new sequence size will be calculated by multiplying the current
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size with this factor, rounded off to the next multiple of 4.
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@param _nMinimumResize the minmal number of bytes which is additionally allocated on resizing
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@param _nMaximumResize as the growth of the stream size is exponential, you may want to specify a
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maxmimum amount of memory which the sequence will grow by. If -1 is used,
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no limit is applied
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@see closeOutput
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*/
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OSequenceOutputStream(
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::com::sun::star::uno::Sequence< sal_Int8 >& _rSeq,
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double _nResizeFactor = 1.3,
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sal_Int32 _nMinimumResize = 128,
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sal_Int32 _nMaximumResize = -1
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);
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/// same as XOutputStream::writeBytes (as expected :)
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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);
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/// this is a dummy in this implementation, no buffering is used
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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);
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/** closes the output stream. In the case of this class, this means that the sequence used for writing is
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resized to the really used size and not used any further, every subsequent call to one of the XOutputStream
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methods will throw a <code>NotConnectedException</code>.
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*/
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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);
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};
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} // namespace comphelper
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#endif //_COMPHELPER_SEQSTREAM_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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