lotuswordpro/source/filter/lwpobjhdr.cxx

   1 /*************************************************************************
   2  *
   3  *  The Contents of this file are made available subject to the terms of
   4  *  either of the following licenses
   5  *
   6  *         - GNU Lesser General Public License Version 2.1
   7  *         - Sun Industry Standards Source License Version 1.1
   8  *
   9  *  Sun Microsystems Inc., October, 2000
  10  *
  11  *  GNU Lesser General Public License Version 2.1
  12  *  =============================================
  13  *  Copyright 2000 by Sun Microsystems, Inc.
  14  *  901 San Antonio Road, Palo Alto, CA 94303, USA
  15  *
  16  *  This library is free software; you can redistribute it and/or
  17  *  modify it under the terms of the GNU Lesser General Public
  18  *  License version 2.1, as published by the Free Software Foundation.
  19  *
  20  *  This library is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  *  Lesser General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU Lesser General Public
  26  *  License along with this library; if not, write to the Free Software
  27  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  28  *  MA  02111-1307  USA
  29  *
  30  *
  31  *  Sun Industry Standards Source License Version 1.1
  32  *  =================================================
  33  *  The contents of this file are subject to the Sun Industry Standards
  34  *  Source License Version 1.1 (the "License"); You may not use this file
  35  *  except in compliance with the License. You may obtain a copy of the
  36  *  License at http://www.openoffice.org/license.html.
  37  *
  38  *  Software provided under this License is provided on an "AS IS" basis,
  39  *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
  40  *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
  41  *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
  42  *  See the License for the specific provisions governing your rights and
  43  *  obligations concerning the Software.
  44  *
  45  *  The Initial Developer of the Original Code is: IBM Corporation
  46  *
  47  *  Copyright: 2008 by IBM Corporation
  48  *
  49  *  All Rights Reserved.
  50  *
  51  *  Contributor(s): _______________________________________
  52  *
  53  *
  54  ************************************************************************/
  55 /*************************************************************************
  56  * @file
  57  *  For LWP filter architecture prototype
  58  ************************************************************************/
  59 /*************************************************************************
  60  * Change History
  61  Jan 2005                       Created
  62  ************************************************************************/
  63
  64 #include "lwpobjhdr.hxx"
  65 #include "lwpdefs.hxx"
  66 #include "lwpfilehdr.hxx"
  67
  68 LwpObjectHeader::LwpObjectHeader()
  69         : m_nTag(0), m_ID(), m_nSize(0), m_bCompressed(sal_False)
  70         // m_nHeaderSize(0), m_nVersionID(0), m_nRefCount(0), m_nFlagBits(0),
  71         //m_nNextVersionOffset(0), m_nNextVersionID(0),
  72 {};
  73 /**
  74  * @descr  read header from stream
  75   */
  76 void LwpObjectHeader::Read(LwpSvStream &rStrm)
  77 {
  78
  79         sal_uInt8 nFlagBits = 0;
  80         sal_uInt32 nVersionID = 0;
  81         sal_uInt32 nRefCount = 0;
  82         sal_uInt32 nNextVersionOffset = 0;
  83         sal_uInt32 nNextVersionID = 0;
  84         sal_uInt32 nHeaderSize = 0;
  85
  86         if ( LwpFileHeader::m_nFileRevision < 0x000B)
  87         {
  88                 rStrm.Read(&m_nTag, sizeof(m_nTag));
  89                 m_ID.Read(&rStrm);
  90                 rStrm.Read(&nVersionID, sizeof(nVersionID));
  91                 rStrm.Read(&nRefCount, sizeof(nRefCount));
  92                 rStrm.Read(&nNextVersionOffset, sizeof(nNextVersionOffset));
  93
  94                 nHeaderSize = sizeof(m_nTag) + m_ID.DiskSize()
  95                         + sizeof(nVersionID)
  96                         + sizeof(nRefCount)
  97                         + sizeof(nNextVersionOffset)
  98                         + sizeof(m_nSize);
  99
 100                 if ((m_nTag == TAG_AMI) || ( LwpFileHeader::m_nFileRevision < 0x0006))
 101                 {
 102                         rStrm.Read(&nNextVersionID, sizeof(nNextVersionID));
 103                         nHeaderSize += sizeof(nNextVersionID);
 104                 }
 105                 rStrm.Read(&m_nSize, sizeof(m_nSize));
 106         }
 107         else
 108         {
 109                 sal_uInt16 VOType = 0;
 110                 rStrm.Read(&VOType, sizeof(VOType));
 111                 rStrm.Read(&nFlagBits, sizeof(nFlagBits));
 112
 113                 m_nTag = static_cast<sal_uInt32>(VOType);
 114                 m_ID.ReadIndexed(&rStrm);
 115                 nHeaderSize = sizeof(VOType) + sizeof(nFlagBits) + m_ID.DiskSizeIndexed();
 116
 117                 sal_uInt8 tmpByte;
 118                 sal_uInt16 tmpShort;
 119                 switch (nFlagBits & VERSION_BITS)
 120                 {
 121                         case ONE_BYTE_VERSION:
 122                                 rStrm.Read(&tmpByte, sizeof(tmpByte));
 123                                 nVersionID = static_cast<sal_uInt32>( tmpByte );
 124                                 nHeaderSize++;
 125                                 break;
 126
 127                         case TWO_BYTE_VERSION:
 128                                 rStrm.Read(&tmpShort, sizeof(tmpShort));
 129                                 nVersionID = static_cast<sal_uInt32>( tmpShort );
 130                                 nHeaderSize += 2;
 131                                 break;
 132
 133                         case FOUR_BYTE_VERSION:
 134                                 rStrm.Read(&nVersionID, sizeof(nVersionID));
 135                                 nHeaderSize += 4;
 136                                 break;
 137                         case DEFAULT_VERSION:   //fall through
 138                         default:
 139                                 nVersionID = 2;
 140                                 break;          // nothing
 141                 }
 142
 143                 switch (nFlagBits & REFCOUNT_BITS)
 144                 {
 145                         case ONE_BYTE_REFCOUNT:
 146                                 rStrm.Read(&tmpByte, sizeof(tmpByte));
 147                                 nRefCount = static_cast<sal_uInt32>( tmpByte );
 148                                 nHeaderSize++;
 149                                 break;
 150
 151                         case TWO_BYTE_REFCOUNT:
 152                                 rStrm.Read(&tmpShort, sizeof(tmpShort));
 153                                 nRefCount = static_cast<sal_uInt32>( tmpShort );
 154                                 nHeaderSize += 2;
 155                                 break;
 156
 157                         case FOUR_BYTE_REFCOUNT:        //through
 158                         default:
 159                                 rStrm.Read(&nRefCount, sizeof(nRefCount));
 160                                 nHeaderSize += 4;
 161                                 break;
 162                 }
 163
 164                 if (nFlagBits & HAS_PREVOFFSET)
 165                 {
 166                         rStrm.Read(&nNextVersionOffset, sizeof(nNextVersionOffset));
 167                         nHeaderSize += 4;
 168                 }
 169                 else
 170                         nNextVersionOffset = BAD_OFFSET;
 171
 172                 switch (nFlagBits & SIZE_BITS)
 173                 {
 174                         case ONE_BYTE_SIZE:
 175                                 rStrm.Read(&tmpByte, sizeof(tmpByte));
 176                                 m_nSize = static_cast<sal_uInt32>( tmpByte );
 177                                 nHeaderSize++;
 178                                 break;
 179
 180                         case TWO_BYTE_SIZE:
 181                                 rStrm.Read(&tmpShort, sizeof(tmpShort));
 182                                 m_nSize = static_cast<sal_uInt32>(tmpShort);
 183                                 nHeaderSize += 2;
 184                                 break;
 185
 186                         case FOUR_BYTE_SIZE:    //go through
 187                         default:
 188                                 rStrm.Read(&m_nSize, sizeof(m_nSize));
 189                                 nHeaderSize += 4;
 190                                 break;
 191                 }
 192
 193                 if (nFlagBits & DATA_COMPRESSED)
 194                 {
 195                         m_bCompressed = sal_True;
 196                 }
 197         }
 198 }