| /************************************************************** |
| * |
| * 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 <Inflater.hxx> |
| #ifndef _ZLIB_H |
| #ifdef SYSTEM_ZLIB |
| #include <zlib.h> |
| #else |
| #include <external/zlib/zlib.h> |
| #endif |
| #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) |
| : 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 SYSTEM_ZLIB || !defined ZLIB_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 SYSTEM_ZLIB || !defined ZLIB_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; |
| } |
| |