Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include <package/Deflater.hxx>
      21             : #include <zlib.h>
      22             : #include <com/sun/star/packages/zip/ZipConstants.hpp>
      23             : #include <string.h>
      24             : 
      25             : using namespace com::sun::star::packages::zip::ZipConstants;
      26             : using namespace com::sun::star;
      27             : using namespace ZipUtils;
      28             : 
      29             : /** Provides general purpose compression using the ZLIB compression
      30             :  * library.
      31             :  */
      32             : 
      33       38328 : Deflater::~Deflater(void)
      34             : {
      35       19164 :     end();
      36       19164 : }
      37       19164 : void Deflater::init (sal_Int32 nLevelArg, sal_Int32 nStrategyArg, bool bNowrap)
      38             : {
      39       19164 :     pStream = new z_stream;
      40             :     /* Memset it to 0...sets zalloc/zfree/opaque to NULL */
      41       19164 :     memset (pStream, 0, sizeof(*pStream));
      42             : 
      43       19164 :     switch (deflateInit2(pStream, nLevelArg, Z_DEFLATED, bNowrap? -MAX_WBITS : MAX_WBITS,
      44             :                 DEF_MEM_LEVEL, nStrategyArg))
      45             :     {
      46             :         case Z_OK:
      47       19164 :             break;
      48             :         case Z_MEM_ERROR:
      49           0 :             delete pStream;
      50           0 :             break;
      51             :         case Z_STREAM_ERROR:
      52           0 :             delete pStream;
      53           0 :             break;
      54             :         default:
      55           0 :              break;
      56             :     }
      57       19164 : }
      58             : 
      59       19164 : Deflater::Deflater(sal_Int32 nSetLevel, bool bNowrap)
      60             : : bFinish(false)
      61             : , bFinished(false)
      62             : , nStrategy(DEFAULT_STRATEGY)
      63             : , nOffset(0)
      64       19164 : , nLength(0)
      65             : {
      66       19164 :     init(nSetLevel, DEFAULT_STRATEGY, bNowrap);
      67       19164 : }
      68             : 
      69       35778 : sal_Int32 Deflater::doDeflateBytes (uno::Sequence < sal_Int8 > &rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength)
      70             : {
      71             :     sal_Int32 nResult;
      72       35778 :     pStream->next_in   = (unsigned char*) sInBuffer.getConstArray() + nOffset;
      73       35778 :     pStream->next_out  = (unsigned char*) rBuffer.getArray()+nNewOffset;
      74       35778 :     pStream->avail_in  = nLength;
      75       35778 :     pStream->avail_out = nNewLength;
      76             : 
      77             : #if !defined Z_PREFIX
      78       35778 :     nResult = deflate(pStream, bFinish ? Z_FINISH : Z_NO_FLUSH);
      79             : #else
      80             :     nResult = z_deflate(pStream, bFinish ? Z_FINISH : Z_NO_FLUSH);
      81             : #endif
      82       35778 :     switch (nResult)
      83             :     {
      84             :         case Z_STREAM_END:
      85       17544 :             bFinished = true;
      86             :         case Z_OK:
      87       35778 :             nOffset += nLength - pStream->avail_in;
      88       35778 :             nLength = pStream->avail_in;
      89       35778 :             return nNewLength - pStream->avail_out;
      90             :         default:
      91           0 :             return 0;
      92             :     }
      93             : }
      94             : 
      95       18334 : void SAL_CALL Deflater::setInputSegment( const uno::Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
      96             : {
      97             :     OSL_ASSERT( !(nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength()));
      98             : 
      99       18334 :     sInBuffer = rBuffer;
     100       18334 :     nOffset = nNewOffset;
     101       18334 :     nLength = nNewLength;
     102       18334 : }
     103             : 
     104       36568 : bool SAL_CALL Deflater::needsInput(  )
     105             : {
     106       36568 :     return nLength <=0;
     107             : }
     108       17544 : void SAL_CALL Deflater::finish(  )
     109             : {
     110       17544 :     bFinish = true;
     111       17544 : }
     112       35778 : sal_Int32 SAL_CALL Deflater::doDeflateSegment( uno::Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength )
     113             : {
     114             :     OSL_ASSERT( !(nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength()));
     115       35778 :     return doDeflateBytes(rBuffer, nNewOffset, nNewLength);
     116             : }
     117       17534 : sal_Int64 SAL_CALL Deflater::getTotalIn(  )
     118             : {
     119       17534 :     return pStream->total_in; // FIXME64: zlib doesn't look 64bit clean here
     120             : }
     121       17534 : sal_Int64 SAL_CALL Deflater::getTotalOut(  )
     122             : {
     123       17534 :     return pStream->total_out; // FIXME64: zlib doesn't look 64bit clean here
     124             : }
     125       17544 : void SAL_CALL Deflater::reset(  )
     126             : {
     127             : #if !defined Z_PREFIX
     128       17544 :     deflateReset(pStream);
     129             : #else
     130             :     z_deflateReset(pStream);
     131             : #endif
     132       17544 :     bFinish = false;
     133       17544 :     bFinished = false;
     134       17544 :     nOffset = nLength = 0;
     135       17544 : }
     136       19164 : void SAL_CALL Deflater::end(  )
     137             : {
     138       19164 :     if (pStream != NULL)
     139             :     {
     140             : #if !defined Z_PREFIX
     141       19164 :         deflateEnd(pStream);
     142             : #else
     143             :         z_deflateEnd(pStream);
     144             : #endif
     145       19164 :         delete pStream;
     146             :     }
     147       19164 :     pStream = NULL;
     148       19164 : }
     149             : 
     150             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */