162 lines
4.2 KiB
C++
162 lines
4.2 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org 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
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_package.hxx"
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#include <Inflater.hxx>
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#ifndef _ZLIB_H
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#ifdef SYSTEM_ZLIB
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#include <zlib.h>
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#else
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#include <external/zlib/zlib.h>
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#endif
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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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: 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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nLastInflateError(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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delete pStream;
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break;
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case Z_STREAM_ERROR:
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delete pStream;
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break;
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default:
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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::setInput( const Sequence< sal_Int8 >& rBuffer )
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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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sal_Bool SAL_CALL Inflater::needsDictionary( )
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{
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return bNeedDict;
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}
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sal_Bool SAL_CALL Inflater::finished( )
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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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{
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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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void SAL_CALL Inflater::end( )
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{
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if (pStream != NULL)
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{
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#ifdef SYSTEM_ZLIB
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inflateEnd(pStream);
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#else
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z_inflateEnd(pStream);
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#endif
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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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if ( !pStream )
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{
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nLastInflateError = Z_STREAM_ERROR;
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return 0;
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}
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nLastInflateError = 0;
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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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#ifdef SYSTEM_ZLIB
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sal_Int32 nResult = ::inflate(pStream, Z_PARTIAL_FLUSH);
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#else
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sal_Int32 nResult = ::z_inflate(pStream, Z_PARTIAL_FLUSH);
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#endif
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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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return 0;
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default:
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// it is no error, if there is no input or no output
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if ( nLength && nNewLength )
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nLastInflateError = nResult;
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}
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return 0;
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}
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