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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include <package/Inflater.hxx>
#include <zlib.h>
#include <string.h> // for memset
using namespace com::sun::star::uno;
using namespace ZipUtils;
/** Provides general purpose decompression using the ZLIB library */
Inflater::Inflater(sal_Bool bNoWrap)
: bFinished(sal_False),
bSetParams(sal_False),
bNeedDict(sal_False),
nOffset(0),
nLength(0),
nLastInflateError(0),
pStream(NULL)
{
pStream = new z_stream;
/* memset to 0 to set zalloc/opaque etc */
memset (pStream, 0, sizeof(*pStream));
sal_Int32 nRes;
nRes = inflateInit2(pStream, bNoWrap ? -MAX_WBITS : MAX_WBITS);
switch (nRes)
{
case Z_OK:
break;
case Z_MEM_ERROR:
delete pStream;
break;
case Z_STREAM_ERROR:
delete pStream;
break;
default:
break;
}
}
Inflater::~Inflater()
{
end();
}
void SAL_CALL Inflater::setInput( const Sequence< sal_Int8 >& rBuffer )
{
sInBuffer = rBuffer;
nOffset = 0;
nLength = rBuffer.getLength();
}
sal_Bool SAL_CALL Inflater::needsDictionary( )
{
return bNeedDict;
}
sal_Bool SAL_CALL Inflater::finished( )
{
return bFinished;
}
sal_Int32 SAL_CALL Inflater::doInflateSegment( Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
{
if (nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())
{
// do error handling
}
return doInflateBytes(rBuffer, nNewOffset, nNewLength);
}
void SAL_CALL Inflater::end( )
{
if (pStream != NULL)
{
#if !defined Z_PREFIX
inflateEnd(pStream);
#else
z_inflateEnd(pStream);
#endif
delete pStream;
}
pStream = NULL;
}
sal_Int32 Inflater::doInflateBytes (Sequence < sal_Int8 > &rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength)
{
if ( !pStream )
{
nLastInflateError = Z_STREAM_ERROR;
return 0;
}
nLastInflateError = 0;
pStream->next_in = ( unsigned char* ) ( sInBuffer.getConstArray() + nOffset );
pStream->avail_in = nLength;
pStream->next_out = reinterpret_cast < unsigned char* > ( rBuffer.getArray() + nNewOffset );
pStream->avail_out = nNewLength;
#if !defined Z_PREFIX
sal_Int32 nResult = ::inflate(pStream, Z_PARTIAL_FLUSH);
#else
sal_Int32 nResult = ::z_inflate(pStream, Z_PARTIAL_FLUSH);
#endif
switch (nResult)
{
case Z_STREAM_END:
bFinished = sal_True;
case Z_OK:
nOffset += nLength - pStream->avail_in;
nLength = pStream->avail_in;
return nNewLength - pStream->avail_out;
case Z_NEED_DICT:
bNeedDict = sal_True;
nOffset += nLength - pStream->avail_in;
nLength = pStream->avail_in;
return 0;
default:
// it is no error, if there is no input or no output
if ( nLength && nNewLength )
nLastInflateError = nResult;
}
return 0;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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