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-rw-r--r-- | lotuswordpro/source/filter/explode.hxx | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/lotuswordpro/source/filter/explode.hxx b/lotuswordpro/source/filter/explode.hxx new file mode 100644 index 000000000..fb13a6f26 --- /dev/null +++ b/lotuswordpro/source/filter/explode.hxx @@ -0,0 +1,124 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * The Contents of this file are made available subject to the terms of + * either of the following licenses + * + * - GNU Lesser General Public License Version 2.1 + * - Sun Industry Standards Source License Version 1.1 + * + * Sun Microsystems Inc., October, 2000 + * + * GNU Lesser General Public License Version 2.1 + * ============================================= + * Copyright 2000 by Sun Microsystems, Inc. + * 901 San Antonio Road, Palo Alto, CA 94303, USA + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * + * Sun Industry Standards Source License Version 1.1 + * ================================================= + * The contents of this file are subject to the Sun Industry Standards + * Source License Version 1.1 (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.openoffice.org/license.html. + * + * Software provided under this License is provided on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, + * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS, + * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING. + * See the License for the specific provisions governing your rights and + * obligations concerning the Software. + * + * The Initial Developer of the Original Code is: IBM Corporation + * + * Copyright: 2008 by IBM Corporation + * + * All Rights Reserved. + * + * Contributor(s): _______________________________________ + * + * + ************************************************************************/ +#ifndef INCLUDED_LOTUSWORDPRO_SOURCE_FILTER_EXPLODE_HXX +#define INCLUDED_LOTUSWORDPRO_SOURCE_FILTER_EXPLODE_HXX + +#include <sal/types.h> +#include <memory> + +class SvStream; + +class HuffmanTreeNode +{ + std::unique_ptr<HuffmanTreeNode> left; + std::unique_ptr<HuffmanTreeNode> right; + sal_uInt32 value; + +public: + explicit HuffmanTreeNode(sal_uInt32 value = 0xffffffff); + ~HuffmanTreeNode(); + HuffmanTreeNode* InsertNode(sal_uInt32 nValue, const char* pInCode); + HuffmanTreeNode* QueryNode(const char* pCode); + sal_uInt32 QueryValue(const char* pCode); +}; + +/** + * @brief + * define the function type for input read, output write + */ +#define CHUNK 16384 +#define MAXWIN 4096 /* maximum window size */ +class Decompression +{ +public: + Decompression(SvStream* pInStream, SvStream* pOutStream); + /** + * @brief + * decompress from instream to outstream + */ + sal_Int32 explode(); + sal_uInt32 ReadBits(sal_uInt16 iCount, sal_uInt32& nBits); + sal_uInt32 Decode(HuffmanTreeNode* pRoot); + + /** + * @brief + * compressed/decompressed stream + */ + SvStream* m_pInStream; + SvStream* m_pOutStream; + + sal_uInt32 m_nCurrent4Byte; // bit buffer + sal_uInt32 m_nBitsLeft; // number of bits remained in bit buffer + + sal_uInt8 m_Buffer[CHUNK]; // input byte buffer + sal_uInt8* m_pBuffer; // pointer to input buffer + sal_uInt32 m_nBytesLeft; // number of bytes remained in byte buffer + + sal_uInt8 m_Output[MAXWIN]; // output byte buffer + sal_uInt32 m_nOutputBufferPos; // pointer to output buffer + + sal_uInt32 m_iArrayOfM[16]; + + std::unique_ptr<HuffmanTreeNode> m_Tree1, m_Tree2; + + void ConstructTree1(); + void ConstructTree2(); + void fillArray(); + static void ToString(sal_uInt32 nBits, char* pChar, sal_uInt32 nLen); +}; +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |