301 lines
9 KiB
C++
301 lines
9 KiB
C++
/*************************************************************************
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*
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* $RCSfile: EntryInputStream.cxx,v $
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*
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* $Revision: 1.3 $
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*
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* last change: $Author: mtg $ $Date: 2000-11-21 17:57:07 $
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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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#ifndef _ENTRY_INPUT_STREAM_HXX
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#include "EntryInputStream.hxx"
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#endif
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#ifndef _COM_SUN_STAR_PACKAGE_ZIPCONSTANTS_HPP_
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#include <com/sun/star/package/ZipConstants.hpp>
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#endif
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using namespace rtl;
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using namespace com::sun::star;
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/** Provides access to the compressed data in a zipfile. Decompresses on the fly, but
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* does not currently support XSeekable into the compressed data stream.
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* Acts on the same underlying XInputStream as both the full Zip File and other
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* EntryInputStreams, and thus must maintain its current position in the stream and
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* seek to it before performing any reads.
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*/
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EntryInputStream::EntryInputStream( uno::Reference < io::XInputStream > xNewInput, sal_Int64 nNewBegin, sal_Int64 nNewEnd, sal_Int32 nNewBufferSize, sal_Int64 nUncompressedSize)
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: xStream( xNewInput )
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, xSeek( xNewInput, uno::UNO_QUERY )
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, nCompBegin( nNewBegin )
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, nCompCurrent( nNewBegin )
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, nCompEnd( nNewEnd )
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, nBegin( 0 )
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, nCurrent( 0 )
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, nEnd(nUncompressedSize)
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, aSequence ( nNewEnd - nNewBegin )
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, bReachEOF ( sal_False )
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, aInflater( sal_True )
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, aBuffer( nUncompressedSize )
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{
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if (nCompEnd - nCompBegin < nUncompressedSize)
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bDeflated = sal_True;
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else
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bDeflated = sal_False;
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if (bDeflated)
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{
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xSeek->seek(nNewBegin);
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xStream->readBytes(aSequence, nNewEnd - nNewBegin);
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aInflater.setInputSegment(aSequence, 0, nNewEnd - nNewBegin );
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aInflater.doInflate(aBuffer);
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}
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else
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{
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xSeek->seek(nNewBegin);
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xStream->readBytes(aBuffer, nUncompressedSize);
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}
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}
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EntryInputStream::~EntryInputStream( void )
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{
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}
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void EntryInputStream::fill(void)
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{
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sal_Int32 nLength, nBytesToRead = aSequence.getLength();
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if (nBytesToRead + nCompCurrent> nCompEnd)
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nBytesToRead = nCompEnd - nCompCurrent;
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if (xSeek.is())
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xSeek->seek( nCompCurrent );
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else
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throw (io::IOException());
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nLength = xStream->readBytes(aSequence, nBytesToRead);
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aInflater.setInputSegment(aSequence, 0, nLength);
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}
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sal_Int32 SAL_CALL EntryInputStream::readBytes( uno::Sequence< sal_Int8 >& aData,
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sal_Int32 nBytesToRead )
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throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
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{
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sal_Int64 nDataLen = aData.getLength();
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if (nBytesToRead <=0)
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return 0;
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if (nBytesToRead + nCurrent > nEnd)
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{
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if (nCurrent > nEnd)
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return 0;
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nBytesToRead = nEnd - nCurrent;
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}
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if (nBytesToRead > nDataLen)
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nBytesToRead = nDataLen;
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for ( sal_Int64 i = 0; i< nBytesToRead;i++,nCurrent++)
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aData[i] = aBuffer[nCurrent];
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return nBytesToRead;
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/*
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if (!bDeflated)
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{
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if (xSeek.is())
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xSeek->seek( nCompCurrent );
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sal_Int32 nRead = xStream->readBytes(aData, nBytesToRead );
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nCompCurrent+=nRead;
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return nRead;
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}
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while ( (n = aInflater.doInflate(aData)) == 0)
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{
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if (aInflater.finished() || aInflater.needsDictionary())
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{
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bReachEOF = sal_True;
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return -1;
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}
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if (aInflater.needsInput())
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fill();
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}
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nCurrent+=n;
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return n;
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//return xStream->readBytes(aData, nBytesToRead );
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*/
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}
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sal_Int32 SAL_CALL EntryInputStream::readSomeBytes( uno::Sequence< sal_Int8 >& aData,
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sal_Int32 nMaxBytesToRead )
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throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
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{
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/*
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if (nMaxBytesToRead + nCompCurrent > nEnd)
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{
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if (nCurrent > nEnd)
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return 0;
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nMaxBytesToRead = nEnd - nCurrent;
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}
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if (xSeek.is())
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xSeek->seek( nCurrent );
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else
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throw (io::IOException());
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*/
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return readBytes( aData, nMaxBytesToRead );
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}
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void SAL_CALL EntryInputStream::skipBytes( sal_Int32 nBytesToSkip )
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throw(io::NotConnectedException, io::BufferSizeExceededException, io::IOException, uno::RuntimeException)
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{
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if (nBytesToSkip == 0)
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return;
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if (nBytesToSkip + nCurrent > nEnd )
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nBytesToSkip = nEnd - nCurrent;
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nCurrent+=nBytesToSkip;
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/*
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if (!bDeflated)
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{
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if (nBytesToSkip + nCompCurrent> nCompEnd)
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{
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if (nCurrent> nCompEnd)
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return;
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nBytesToSkip = nCompEnd - nCompCurrent;
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}
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nCompCurrent+=nBytesToSkip;
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}
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else
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{
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sal_Int32 nTotal = 0;
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uno::Sequence < sal_Int8 > aTmpSequence ( 1024 );
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while ( nTotal < nBytesToSkip )
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{
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sal_Int32 nNewLength, nLength = nBytesToSkip - nTotal;
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if ( nLength > aTmpSequence.getLength())
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nLength = aTmpSequence.getLength();
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nNewLength = readSomeBytes(aTmpSequence, nLength);
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if (nNewLength < nLength)
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{
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bReachEOF = sal_True;
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break;
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}
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nTotal +=nNewLength;
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}
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nCurrent+=nBytesToSkip;
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}
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*/
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}
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sal_Int32 SAL_CALL EntryInputStream::available( )
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throw(io::NotConnectedException, io::IOException, uno::RuntimeException)
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{
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return aBuffer.getLength() - nCurrent;
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/*
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if (!bDeflated)
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return nCompEnd - nCompCurrent;
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else
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return nEnd - nCurrent;
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*/
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}
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void SAL_CALL EntryInputStream::closeInput( )
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throw(io::NotConnectedException, io::IOException, uno::RuntimeException)
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{
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}
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void SAL_CALL EntryInputStream::seek( sal_Int64 location )
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throw(lang::IllegalArgumentException, io::IOException, uno::RuntimeException)
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{
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if (location > aBuffer.getLength())
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location = aBuffer.getLength();
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if (location <0)
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location = 0;
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nCurrent = location;
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/*
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if (!bDeflated)
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{
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if (location < nCompBegin)
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location = nCompBegin;
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if (location > nCompEnd)
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location = nCompEnd;
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nCompCurrent = location;
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return;
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}
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else
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{
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if (location == 0)
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nCurrent = nCompCurrent = 0;
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else if (location > nCurrent)
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skipBytes(location - nCurrent);
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else
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{
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nCurrent = 0;
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skipBytes(location);
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}
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}
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*/
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}
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sal_Int64 SAL_CALL EntryInputStream::getPosition( )
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throw(io::IOException, uno::RuntimeException)
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{
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return nCurrent;
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/*
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if (!bDeflated)
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return nCompCurrent;
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else
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return nCurrent;
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*/
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}
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sal_Int64 SAL_CALL EntryInputStream::getLength( )
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throw(io::IOException, uno::RuntimeException)
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{
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return aBuffer.getLength();
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/*
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if (!bDeflated)
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return nCompEnd - nCompBegin;
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else
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return nEnd - nBegin;
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*/
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}
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