| /************************************************************** |
| * |
| * 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. |
| * |
| *************************************************************/ |
| |
| |
| |
| // Save NDEBUG state |
| #ifdef NDEBUG |
| #define STREAMHELPER_HXX_HAD_NDEBUG |
| #undef NDEBUG |
| #endif |
| |
| #if OSL_DEBUG_LEVEL == 0 |
| #define NDEBUG |
| #endif |
| #include <assert.h> |
| |
| #define Max( a, b ) (((a)>(b)) ? (a) : (b) ) |
| #define Min( a, b ) (((a)<(b)) ? (a) : (b) ) |
| |
| namespace io_stm { |
| |
| class IFIFO_OutOfBoundsException : |
| public Exception |
| {}; |
| |
| class IFIFO_OutOfMemoryException : |
| public Exception |
| {}; |
| |
| class IFIFO |
| { |
| public: |
| |
| |
| virtual void write( const Sequence<sal_Int8> &) throw( IFIFO_OutOfMemoryException, |
| IFIFO_OutOfBoundsException )=0; |
| |
| virtual void read( Sequence<sal_Int8> & , sal_Int32 nBytesToRead ) |
| throw( IFIFO_OutOfBoundsException )=0; |
| virtual void skip( sal_Int32 nBytesToSkip ) |
| throw( IFIFO_OutOfBoundsException )=0; |
| virtual sal_Int32 getSize() const throw( ) =0; |
| virtual void shrink() throw() = 0; |
| |
| virtual ~IFIFO() {}; |
| }; |
| |
| |
| class IRingBuffer_OutOfBoundsException : |
| public Exception |
| {}; |
| |
| class IRingBuffer_OutOfMemoryException : |
| public Exception |
| {}; |
| |
| class IRingBuffer |
| { |
| public: |
| /*** |
| * overwrites data at given position. Size is automatically extended, when |
| * data is written beyond end. |
| * |
| ***/ |
| |
| virtual void writeAt( sal_Int32 nPos, const Sequence<sal_Int8> &) |
| throw( IRingBuffer_OutOfMemoryException, |
| IRingBuffer_OutOfBoundsException )=0; |
| virtual void readAt( sal_Int32 nPos, Sequence<sal_Int8> & , sal_Int32 nBytesToRead ) const |
| throw( IRingBuffer_OutOfBoundsException )=0; |
| virtual sal_Int32 getSize() const throw( ) =0; |
| virtual void forgetFromStart( sal_Int32 nBytesToForget ) throw(IRingBuffer_OutOfBoundsException)=0; |
| virtual void forgetFromEnd( sal_Int32 nBytesToForget ) throw(IRingBuffer_OutOfBoundsException)=0; |
| virtual void shrink() throw() = 0; |
| virtual ~IRingBuffer() {}; |
| }; |
| |
| |
| class MemRingBuffer : |
| public IRingBuffer |
| { |
| public: |
| MemRingBuffer(); |
| virtual ~MemRingBuffer(); |
| |
| virtual void writeAt( sal_Int32 nPos, const Sequence<sal_Int8> &) |
| throw( IRingBuffer_OutOfMemoryException, |
| IRingBuffer_OutOfBoundsException ); |
| virtual void readAt( sal_Int32 nPos, Sequence<sal_Int8> & , sal_Int32 nBytesToRead ) const |
| throw( IRingBuffer_OutOfBoundsException ); |
| virtual sal_Int32 getSize() const throw( ); |
| virtual void forgetFromStart( sal_Int32 nBytesToForget ) throw(IRingBuffer_OutOfBoundsException); |
| virtual void forgetFromEnd( sal_Int32 nBytesToForget ) throw(IRingBuffer_OutOfBoundsException); |
| |
| virtual void shrink() throw(); |
| |
| private: |
| |
| void resizeBuffer( sal_Int32 nMinSize ) throw( IRingBuffer_OutOfMemoryException ); |
| inline void checkInvariants() |
| { |
| assert( m_nBufferLen >= 0 ); |
| assert( m_nOccupiedBuffer >= 0 ); |
| assert( m_nOccupiedBuffer <= m_nBufferLen ); |
| assert( m_nStart >= 0 ); |
| assert( 0 == m_nStart || m_nStart < m_nBufferLen ); |
| } |
| |
| sal_Int8 *m_p; |
| sal_Int32 m_nBufferLen; |
| sal_Int32 m_nStart; |
| sal_Int32 m_nOccupiedBuffer; |
| }; |
| |
| |
| class MemFIFO : |
| public IFIFO, |
| private MemRingBuffer |
| { |
| public: |
| virtual void write( const Sequence<sal_Int8> &) throw( IFIFO_OutOfMemoryException, |
| IFIFO_OutOfBoundsException ); |
| virtual void read( Sequence<sal_Int8> & , sal_Int32 nBytesToRead ) |
| throw( IFIFO_OutOfBoundsException ); |
| virtual void skip( sal_Int32 nBytesToSkip ) throw( IFIFO_OutOfBoundsException ); |
| virtual sal_Int32 getSize() const throw( ) |
| { return MemRingBuffer::getSize(); } |
| virtual void shrink() throw() |
| { MemRingBuffer::shrink(); } |
| |
| }; |
| |
| // Restore NDEBUG state |
| #ifdef STREAMHELPER_HXX_HAD_NDEBUG |
| #define NDEBUG |
| #else |
| #undef NDEBUG |
| #endif |
| |
| } |