196 lines
6.5 KiB
C++
196 lines
6.5 KiB
C++
/*************************************************************************
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*
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* $RCSfile: streamhelper.hxx,v $
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*
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* $Revision: 1.3 $
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*
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* last change: $Author: vg $ $Date: 2003-04-15 15:58:58 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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// Save NDEBUG state
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#ifdef NDEBUG
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#define STREAMHELPER_HXX_HAD_NDEBUG
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#undef NDEBUG
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#endif
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#if OSL_DEBUG_LEVEL == 0
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#define NDEBUG
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#endif
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#include <assert.h>
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#define Max( a, b ) (((a)>(b)) ? (a) : (b) )
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#define Min( a, b ) (((a)<(b)) ? (a) : (b) )
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namespace io_stm {
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class IFIFO_OutOfBoundsException :
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public Exception
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{};
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class IFIFO_OutOfMemoryException :
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public Exception
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{};
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class IFIFO
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{
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public:
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virtual void write( const Sequence<sal_Int8> &) throw( IFIFO_OutOfMemoryException,
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IFIFO_OutOfBoundsException )=0;
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virtual void read( Sequence<sal_Int8> & , sal_Int32 nBytesToRead )
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throw( IFIFO_OutOfBoundsException )=0;
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virtual void skip( sal_Int32 nBytesToSkip )
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throw( IFIFO_OutOfBoundsException )=0;
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virtual sal_Int32 getSize() const throw( ) =0;
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virtual void shrink() throw() = 0;
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virtual ~IFIFO() {};
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};
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class IRingBuffer_OutOfBoundsException :
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public Exception
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{};
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class IRingBuffer_OutOfMemoryException :
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public Exception
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{};
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class IRingBuffer
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{
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public:
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/***
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* overwrites data at given position. Size is automatically extended, when
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* data is written beyond end.
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*
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***/
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virtual void writeAt( sal_Int32 nPos, const Sequence<sal_Int8> &)
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throw( IRingBuffer_OutOfMemoryException,
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IRingBuffer_OutOfBoundsException )=0;
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virtual void readAt( sal_Int32 nPos, Sequence<sal_Int8> & , sal_Int32 nBytesToRead ) const
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throw( IRingBuffer_OutOfBoundsException )=0;
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virtual sal_Int32 getSize() const throw( ) =0;
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virtual void forgetFromStart( sal_Int32 nBytesToForget ) throw(IRingBuffer_OutOfBoundsException)=0;
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virtual void forgetFromEnd( sal_Int32 nBytesToForget ) throw(IRingBuffer_OutOfBoundsException)=0;
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virtual void shrink() throw() = 0;
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virtual ~IRingBuffer() {};
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};
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class MemRingBuffer :
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public IRingBuffer
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{
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public:
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MemRingBuffer();
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virtual ~MemRingBuffer();
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virtual void writeAt( sal_Int32 nPos, const Sequence<sal_Int8> &)
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throw( IRingBuffer_OutOfMemoryException,
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IRingBuffer_OutOfBoundsException );
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virtual void readAt( sal_Int32 nPos, Sequence<sal_Int8> & , sal_Int32 nBytesToRead ) const
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throw( IRingBuffer_OutOfBoundsException );
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virtual sal_Int32 getSize() const throw( );
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virtual void forgetFromStart( sal_Int32 nBytesToForget ) throw(IRingBuffer_OutOfBoundsException);
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virtual void forgetFromEnd( sal_Int32 nBytesToForget ) throw(IRingBuffer_OutOfBoundsException);
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virtual void shrink() throw();
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private:
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void resizeBuffer( sal_Int32 nMinSize ) throw( IRingBuffer_OutOfMemoryException );
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inline void checkInvariants()
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{
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assert( m_nBufferLen >= 0 );
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assert( m_nOccupiedBuffer >= 0 );
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assert( m_nOccupiedBuffer <= m_nBufferLen );
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assert( m_nStart >= 0 );
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assert( 0 == m_nStart || m_nStart < m_nBufferLen );
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}
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sal_Int8 *m_p;
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sal_Int32 m_nBufferLen;
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sal_Int32 m_nStart;
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sal_Int32 m_nOccupiedBuffer;
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};
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class MemFIFO :
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public IFIFO,
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private MemRingBuffer
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{
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public:
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virtual void write( const Sequence<sal_Int8> &) throw( IFIFO_OutOfMemoryException,
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IFIFO_OutOfBoundsException );
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virtual void read( Sequence<sal_Int8> & , sal_Int32 nBytesToRead )
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throw( IFIFO_OutOfBoundsException );
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virtual void skip( sal_Int32 nBytesToSkip ) throw( IFIFO_OutOfBoundsException );
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virtual sal_Int32 getSize() const throw( )
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{ return MemRingBuffer::getSize(); }
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virtual void shrink() throw()
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{ MemRingBuffer::shrink(); }
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};
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// Restore NDEBUG state
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#ifdef STREAMHELPER_HXX_HAD_NDEBUG
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#define NDEBUG
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#else
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#undef NDEBUG
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#endif
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}
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