| /************************************************************** |
| * |
| * 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. |
| * |
| *************************************************************/ |
| |
| |
| #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 |
| |
| |