266 lines
7.4 KiB
C++
266 lines
7.4 KiB
C++
/*************************************************************************
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*
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* $RCSfile: Inflater.cxx,v $
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*
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* $Revision: 1.9 $
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*
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* last change: $Author: mtg $ $Date: 2001-07-04 14:56:24 $
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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): Martin Gallwey (gallwey@sun.com)
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*
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*
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************************************************************************/
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#ifndef _INFLATER_HXX_
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#include <Inflater.hxx>
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#endif
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#ifndef _ZLIB_H
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#include <external/zlib/zlib.h>
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#endif
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#ifndef _VOS_DIAGNOSE_H_
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#include <vos/diagnose.hxx>
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#endif
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#include <string.h> // for memset
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using namespace com::sun::star::uno;
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/** Provides general purpose decompression using the ZLIB library */
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Inflater::Inflater(sal_Bool bNoWrap)
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: bFinish(sal_False),
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bFinished(sal_False),
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bSetParams(sal_False),
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bNeedDict(sal_False),
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nOffset(0),
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nLength(0),
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pStream(NULL)
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{
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pStream = new z_stream;
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/* memset to 0 to set zalloc/opaque etc */
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memset (pStream, 0, sizeof(*pStream));
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sal_Int32 nRes;
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nRes = inflateInit2(pStream, bNoWrap ? -MAX_WBITS : MAX_WBITS);
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switch (nRes)
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{
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case Z_OK:
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break;
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case Z_MEM_ERROR:
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VOS_DEBUG_ONLY ( pStream->msg);
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delete pStream;
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break;
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case Z_STREAM_ERROR:
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VOS_DEBUG_ONLY ( pStream->msg);
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delete pStream;
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break;
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default:
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VOS_DEBUG_ONLY ( pStream->msg);
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break;
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}
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}
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Inflater::~Inflater()
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{
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end();
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}
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void SAL_CALL Inflater::setInputSegment( const Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
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throw(RuntimeException)
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{
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sInBuffer = rBuffer;
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nOffset = nNewOffset;
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nLength = nNewLength;
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}
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void SAL_CALL Inflater::setInput( const Sequence< sal_Int8 >& rBuffer )
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throw(RuntimeException)
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{
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sInBuffer = rBuffer;
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nOffset = 0;
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nLength = rBuffer.getLength();
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}
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void SAL_CALL Inflater::setDictionarySegment( const Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
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throw(RuntimeException)
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{
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if (pStream == NULL)
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{
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// do error handling
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}
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if (nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())
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{
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// do error handling
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}
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z_inflateSetDictionary(pStream, (const unsigned char*)rBuffer.getConstArray() + nNewOffset,
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nNewLength);
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}
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void SAL_CALL Inflater::setDictionary( const Sequence< sal_Int8 >& rBuffer )
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throw(RuntimeException)
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{
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if (pStream == NULL)
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{
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// do error handling
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}
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z_inflateSetDictionary(pStream, (const unsigned char*)rBuffer.getConstArray(),
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rBuffer.getLength());
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}
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sal_Int32 SAL_CALL Inflater::getRemaining( )
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throw(RuntimeException)
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{
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return nLength;
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}
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sal_Bool SAL_CALL Inflater::needsInput( )
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throw(RuntimeException)
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{
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return nLength <=0;
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}
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sal_Bool SAL_CALL Inflater::needsDictionary( )
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throw(RuntimeException)
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{
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return bNeedDict;
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}
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void SAL_CALL Inflater::finish( )
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throw(RuntimeException)
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{
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bFinish = sal_True;
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}
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sal_Bool SAL_CALL Inflater::finished( )
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throw(RuntimeException)
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{
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return bFinished;
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}
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sal_Int32 SAL_CALL Inflater::doInflateSegment( Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
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throw(RuntimeException)
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{
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if (nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())
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{
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// do error handling
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}
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return doInflateBytes(rBuffer, nNewOffset, nNewLength);
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}
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sal_Int32 SAL_CALL Inflater::doInflate( Sequence< sal_Int8 >& rBuffer )
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throw(RuntimeException)
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{
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return doInflateBytes(rBuffer, 0, rBuffer.getLength());
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}
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sal_Int32 SAL_CALL Inflater::getAdler( )
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throw(RuntimeException)
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{
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return pStream->adler;
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}
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sal_Int32 SAL_CALL Inflater::getTotalIn( )
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throw(RuntimeException)
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{
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return pStream->total_in;
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}
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sal_Int32 SAL_CALL Inflater::getTotalOut( )
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throw(RuntimeException)
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{
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return pStream->total_out;
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}
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void SAL_CALL Inflater::reset( )
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throw(RuntimeException)
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{
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z_inflateReset(pStream);
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bFinish = bNeedDict = bFinished = sal_False;
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nOffset = nLength = 0;
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}
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void SAL_CALL Inflater::end( )
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throw(RuntimeException)
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{
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if (pStream != NULL)
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{
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z_inflateEnd(pStream);
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delete pStream;
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}
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pStream = NULL;
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}
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sal_Int32 Inflater::doInflateBytes (Sequence < sal_Int8 > &rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength)
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{
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sal_Int32 nResult;
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pStream->next_in = ( unsigned char* ) ( sInBuffer.getConstArray() + nOffset );
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pStream->avail_in = nLength;
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pStream->next_out = reinterpret_cast < unsigned char* > ( rBuffer.getArray() + nNewOffset );
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pStream->avail_out = nNewLength;
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nResult = ::z_inflate(pStream, bFinish ? Z_SYNC_FLUSH : Z_PARTIAL_FLUSH);
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switch (nResult)
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{
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case Z_STREAM_END:
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bFinished = sal_True;
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case Z_OK:
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nOffset += nLength - pStream->avail_in;
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nLength = pStream->avail_in;
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return nNewLength - pStream->avail_out;
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case Z_NEED_DICT:
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bNeedDict = sal_True;
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nOffset += nLength - pStream->avail_in;
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nLength = pStream->avail_in;
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case Z_BUF_ERROR:
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return 0;
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case Z_DATA_ERROR:
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VOS_DEBUG_ONLY(pStream->msg);
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return 0;
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}
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return 0;
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}
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