| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| // MARKER(update_precomp.py): autogen include statement, do not remove |
| #include "precompiled_package.hxx" |
| #include <Deflater.hxx> |
| #ifndef _ZLIB_H |
| #ifdef SYSTEM_ZLIB |
| #include <zlib.h> |
| #else |
| #include <external/zlib/zlib.h> |
| #endif |
| #endif |
| #include <com/sun/star/packages/zip/ZipConstants.hpp> |
| #include <string.h> // for memset |
| |
| using namespace com::sun::star::packages::zip::ZipConstants; |
| using namespace com::sun::star; |
| |
| /** Provides general purpose compression using the ZLIB compression |
| * library. |
| */ |
| |
| Deflater::~Deflater(void) |
| { |
| end(); |
| } |
| void Deflater::init (sal_Int32 nLevelArg, sal_Int32 nStrategyArg, sal_Bool bNowrap) |
| { |
| pStream = new z_stream; |
| /* Memset it to 0...sets zalloc/zfree/opaque to NULL */ |
| memset (pStream, 0, sizeof(*pStream)); |
| |
| switch (deflateInit2(pStream, nLevelArg, Z_DEFLATED, bNowrap? -MAX_WBITS : MAX_WBITS, |
| DEF_MEM_LEVEL, nStrategyArg)) |
| { |
| case Z_OK: |
| break; |
| case Z_MEM_ERROR: |
| delete pStream; |
| break; |
| case Z_STREAM_ERROR: |
| delete pStream; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| Deflater::Deflater(sal_Int32 nSetLevel, sal_Bool bNowrap) |
| : bFinish(sal_False) |
| , bFinished(sal_False) |
| , bSetParams(sal_False) |
| , nLevel(nSetLevel) |
| , nStrategy(DEFAULT_STRATEGY) |
| , nOffset(0) |
| , nLength(0) |
| { |
| init(nSetLevel, DEFAULT_STRATEGY, bNowrap); |
| } |
| |
| sal_Int32 Deflater::doDeflateBytes (uno::Sequence < sal_Int8 > &rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength) |
| { |
| sal_Int32 nResult; |
| if (bSetParams) |
| { |
| pStream->next_in = (unsigned char*) sInBuffer.getConstArray() + nOffset; |
| pStream->next_out = (unsigned char*) rBuffer.getArray()+nNewOffset; |
| pStream->avail_in = nLength; |
| pStream->avail_out = nNewLength; |
| |
| #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIX |
| nResult = deflateParams(pStream, nLevel, nStrategy); |
| #else |
| nResult = z_deflateParams(pStream, nLevel, nStrategy); |
| #endif |
| switch (nResult) |
| { |
| case Z_OK: |
| bSetParams = sal_False; |
| nOffset += nLength - pStream->avail_in; |
| nLength = pStream->avail_in; |
| return nNewLength - pStream->avail_out; |
| case Z_BUF_ERROR: |
| bSetParams = sal_False; |
| return 0; |
| default: |
| return 0; |
| } |
| } |
| else |
| { |
| pStream->next_in = (unsigned char*) sInBuffer.getConstArray() + nOffset; |
| pStream->next_out = (unsigned char*) rBuffer.getArray()+nNewOffset; |
| pStream->avail_in = nLength; |
| pStream->avail_out = nNewLength; |
| |
| #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIX |
| nResult = deflate(pStream, bFinish ? Z_FINISH : Z_NO_FLUSH); |
| #else |
| nResult = z_deflate(pStream, bFinish ? Z_FINISH : Z_NO_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_BUF_ERROR: |
| bSetParams = sal_False; |
| return 0; |
| default: |
| return 0; |
| } |
| } |
| } |
| |
| void SAL_CALL Deflater::setInputSegment( const uno::Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength ) |
| { |
| OSL_ASSERT( !(nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())); |
| |
| sInBuffer = rBuffer; |
| nOffset = nNewOffset; |
| nLength = nNewLength; |
| } |
| void SAL_CALL Deflater::setLevel( sal_Int32 nNewLevel ) |
| { |
| if ((nNewLevel < 0 || nNewLevel > 9) && nNewLevel != DEFAULT_COMPRESSION) |
| { |
| // do error handling |
| } |
| if (nNewLevel != nLevel) |
| { |
| nLevel = nNewLevel; |
| bSetParams = sal_True; |
| } |
| } |
| sal_Bool SAL_CALL Deflater::needsInput( ) |
| { |
| return nLength <=0; |
| } |
| void SAL_CALL Deflater::finish( ) |
| { |
| bFinish = sal_True; |
| } |
| sal_Bool SAL_CALL Deflater::finished( ) |
| { |
| return bFinished; |
| } |
| sal_Int32 SAL_CALL Deflater::doDeflateSegment( uno::Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength ) |
| { |
| OSL_ASSERT( !(nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())); |
| return doDeflateBytes(rBuffer, nNewOffset, nNewLength); |
| } |
| sal_Int32 SAL_CALL Deflater::getTotalIn( ) |
| { |
| return pStream->total_in; |
| } |
| sal_Int32 SAL_CALL Deflater::getTotalOut( ) |
| { |
| return pStream->total_out; |
| } |
| void SAL_CALL Deflater::reset( ) |
| { |
| #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIXB |
| deflateReset(pStream); |
| #else |
| z_deflateReset(pStream); |
| #endif |
| bFinish = sal_False; |
| bFinished = sal_False; |
| nOffset = nLength = 0; |
| } |
| void SAL_CALL Deflater::end( ) |
| { |
| if (pStream != NULL) |
| { |
| #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIX |
| deflateEnd(pStream); |
| #else |
| z_deflateEnd(pStream); |
| #endif |
| delete pStream; |
| } |
| pStream = NULL; |
| } |