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Diffstat (limited to '')
| -rw-r--r-- | package/source/zipapi/Inflater.cxx | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/package/source/zipapi/Inflater.cxx b/package/source/zipapi/Inflater.cxx new file mode 100644 index 000000000..d03fed8c0 --- /dev/null +++ b/package/source/zipapi/Inflater.cxx @@ -0,0 +1,137 @@ +/* -*- 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: */ |