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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: Inflater.cxx,v $
*
* $Revision: 1.12 $
*
* last change: $Author: rt $ $Date: 2005-09-08 16:12:30 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef _INFLATER_HXX_
#include <Inflater.hxx>
#endif
#ifndef _ZLIB_H
#ifdef SYSTEM_ZLIB
#include <zlib.h>
#else
#include <external/zlib/zlib.h>
#endif
#endif
#ifndef _VOS_DIAGNOSE_H_
#include <vos/diagnose.hxx>
#endif
#include <string.h> // for memset
using namespace com::sun::star::uno;
/** Provides general purpose decompression using the ZLIB library */
Inflater::Inflater(sal_Bool bNoWrap)
: bFinish(sal_False),
bFinished(sal_False),
bSetParams(sal_False),
bNeedDict(sal_False),
nOffset(0),
nLength(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:
VOS_DEBUG_ONLY ( pStream->msg);
delete pStream;
break;
case Z_STREAM_ERROR:
VOS_DEBUG_ONLY ( pStream->msg);
delete pStream;
break;
default:
VOS_DEBUG_ONLY ( pStream->msg);
break;
}
}
Inflater::~Inflater()
{
end();
}
void SAL_CALL Inflater::setInputSegment( const Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
{
sInBuffer = rBuffer;
nOffset = nNewOffset;
nLength = nNewLength;
}
void SAL_CALL Inflater::setInput( const Sequence< sal_Int8 >& rBuffer )
{
sInBuffer = rBuffer;
nOffset = 0;
nLength = rBuffer.getLength();
}
void SAL_CALL Inflater::setDictionarySegment( const Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
{
if (pStream == NULL)
{
// do error handling
}
if (nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())
{
// do error handling
}
#ifdef SYSTEM_ZLIB
inflateSetDictionary(pStream, (const unsigned char*)rBuffer.getConstArray() + nNewOffset,
nNewLength);
#else
z_inflateSetDictionary(pStream, (const unsigned char*)rBuffer.getConstArray() + nNewOffset,
nNewLength);
#endif
}
void SAL_CALL Inflater::setDictionary( const Sequence< sal_Int8 >& rBuffer )
{
if (pStream == NULL)
{
// do error handling
}
#ifdef SYSTEM_ZLIB
inflateSetDictionary(pStream, (const unsigned char*)rBuffer.getConstArray(),
rBuffer.getLength());
#else
z_inflateSetDictionary(pStream, (const unsigned char*)rBuffer.getConstArray(),
rBuffer.getLength());
#endif
}
sal_Int32 SAL_CALL Inflater::getRemaining( )
{
return nLength;
}
sal_Bool SAL_CALL Inflater::needsInput( )
{
return nLength <=0;
}
sal_Bool SAL_CALL Inflater::needsDictionary( )
{
return bNeedDict;
}
void SAL_CALL Inflater::finish( )
{
bFinish = sal_True;
}
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);
}
sal_Int32 SAL_CALL Inflater::doInflate( Sequence< sal_Int8 >& rBuffer )
{
return doInflateBytes(rBuffer, 0, rBuffer.getLength());
}
sal_Int32 SAL_CALL Inflater::getAdler( )
{
return pStream->adler;
}
sal_Int32 SAL_CALL Inflater::getTotalIn( )
{
return pStream->total_in;
}
sal_Int32 SAL_CALL Inflater::getTotalOut( )
{
return pStream->total_out;
}
void SAL_CALL Inflater::reset( )
{
#ifdef SYSTEM_ZLIB
inflateReset(pStream);
#else
z_inflateReset(pStream);
#endif
bFinish = bNeedDict = bFinished = sal_False;
nOffset = nLength = 0;
}
void SAL_CALL Inflater::end( )
{
if (pStream != NULL)
{
#ifdef SYSTEM_ZLIB
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)
{
sal_Int32 nResult;
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;
#ifdef SYSTEM_ZLIB
nResult = ::inflate(pStream, bFinish ? Z_SYNC_FLUSH : Z_PARTIAL_FLUSH);
#else
nResult = ::z_inflate(pStream, bFinish ? Z_SYNC_FLUSH : 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;
case Z_BUF_ERROR:
return 0;
case Z_DATA_ERROR:
VOS_DEBUG_ONLY(pStream->msg);
return 0;
}
return 0;
}
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