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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <package/Inflater.hxx>
#include <zlib.h>
#include <string.h>
using namespace com::sun::star::uno;
using namespace ZipUtils;
/** Provides general purpose decompression using the ZLIB library */
Inflater::Inflater(bool bNoWrap)
: bFinished(false),
bNeedDict(false),
nOffset(0),
nLength(0),
nLastInflateError(0)
{
pStream.reset(new z_stream);
/* memset to 0 to set zalloc/opaque etc */
memset (pStream.get(), 0, sizeof(*pStream));
sal_Int32 nRes;
nRes = inflateInit2(pStream.get(), bNoWrap ? -MAX_WBITS : MAX_WBITS);
switch (nRes)
{
case Z_OK:
break;
case Z_MEM_ERROR:
pStream.reset();
break;
case Z_STREAM_ERROR:
pStream.reset();
break;
default:
break;
}
}
Inflater::~Inflater()
{
end();
}
void Inflater::setInput( const Sequence< sal_Int8 >& rBuffer )
{
sInBuffer = rBuffer;
nOffset = 0;
nLength = rBuffer.getLength();
}
sal_Int32 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 Inflater::end( )
{
if (pStream)
{
#if !defined Z_PREFIX
inflateEnd(pStream.get());
#else
z_inflateEnd(pStream.get());
#endif
pStream.reset();
}
}
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 = reinterpret_cast<const 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.get(), Z_PARTIAL_FLUSH);
#else
sal_Int32 nResult = ::z_inflate(pStream.get(), Z_PARTIAL_FLUSH);
#endif
switch (nResult)
{
case Z_STREAM_END:
bFinished = true;
[[fallthrough]];
case Z_OK:
nOffset += nLength - pStream->avail_in;
nLength = pStream->avail_in;
return nNewLength - pStream->avail_out;
case Z_NEED_DICT:
bNeedDict = 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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