lotuswordpro/source/filter/lwpobjhdr.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*************************************************************************
   3  *
   4  *  The Contents of this file are made available subject to the terms of
   5  *  either of the following licenses
   6  *
   7  *         - GNU Lesser General Public License Version 2.1
   8  *         - Sun Industry Standards Source License Version 1.1
   9  *
  10  *  Sun Microsystems Inc., October, 2000
  11  *
  12  *  GNU Lesser General Public License Version 2.1
  13  *  =============================================
  14  *  Copyright 2000 by Sun Microsystems, Inc.
  15  *  901 San Antonio Road, Palo Alto, CA 94303, USA
  16  *
  17  *  This library is free software; you can redistribute it and/or
  18  *  modify it under the terms of the GNU Lesser General Public
  19  *  License version 2.1, as published by the Free Software Foundation.
  20  *
  21  *  This library is distributed in the hope that it will be useful,
  22  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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  24  *  Lesser General Public License for more details.
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  26  *  You should have received a copy of the GNU Lesser General Public
  27  *  License along with this library; if not, write to the Free Software
  28  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  29  *  MA  02111-1307  USA
  30  *
  31  *
  32  *  Sun Industry Standards Source License Version 1.1
  33  *  =================================================
  34  *  The contents of this file are subject to the Sun Industry Standards
  35  *  Source License Version 1.1 (the "License"); You may not use this file
  36  *  except in compliance with the License. You may obtain a copy of the
  37  *  License at http://www.openoffice.org/license.html.
  38  *
  39  *  Software provided under this License is provided on an "AS IS" basis,
  40  *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
  41  *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
  42  *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
  43  *  See the License for the specific provisions governing your rights and
  44  *  obligations concerning the Software.
  45  *
  46  *  The Initial Developer of the Original Code is: IBM Corporation
  47  *
  48  *  Copyright: 2008 by IBM Corporation
  49  *
  50  *  All Rights Reserved.
  51  *
  52  *  Contributor(s): _______________________________________
  53  *
  54  *
  55  ************************************************************************/
  56 /*************************************************************************
  57  * @file
  58  *  For LWP filter architecture prototype
  59  ************************************************************************/
  60 /*************************************************************************
  61  * Change History
  62  Jan 2005           Created
  63  ************************************************************************/
  64
  65 #include "lwpobjhdr.hxx"
  66 #include "lwpdefs.hxx"
  67 #include "lwpfilehdr.hxx"
  68
  69 LwpObjectHeader::LwpObjectHeader()
  70     : m_nTag(0), m_ID(), m_nSize(0), m_bCompressed(false)
  71     // m_nHeaderSize(0), m_nVersionID(0), m_nRefCount(0), m_nFlagBits(0),
  72     //m_nNextVersionOffset(0), m_nNextVersionID(0),
  73 {}
  74 /**
  75  * @descr  read header from stream
  76   */
  77 bool LwpObjectHeader::Read(LwpSvStream &rStrm)
  78 {
  79     sal_uInt32 nVersionID = 0;
  80     sal_uInt32 nRefCount = 0;
  81     sal_uInt32 nNextVersionOffset = 0;
  82     sal_uInt32 nHeaderSize = 0;
  83
  84     sal_Int64 nStartPos = rStrm.Tell();
  85
  86     if ( LwpFileHeader::m_nFileRevision < 0x000B)
  87     {
  88         rStrm.ReadUInt32( m_nTag );
  89         m_ID.Read(&rStrm);
  90         rStrm.ReadUInt32( nVersionID );
  91         rStrm.ReadUInt32( nRefCount );
  92         rStrm.ReadUInt32( nNextVersionOffset );
  93
  94         nHeaderSize = sizeof(m_nTag) + LwpObjectID::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             sal_uInt32 nNextVersionID = 0;
 103             rStrm.ReadUInt32( nNextVersionID );
 104             nHeaderSize += sizeof(nNextVersionID);
 105         }
 106         rStrm.ReadUInt32( m_nSize );
 107     }
 108     else
 109     {
 110         sal_uInt8 nFlagBits = 0;
 111         sal_uInt16 VOType = 0;
 112         rStrm.ReadUInt16( VOType );
 113         rStrm.ReadUInt8( nFlagBits );
 114
 115         m_nTag = static_cast<sal_uInt32>(VOType);
 116         m_ID.ReadIndexed(&rStrm);
 117         nHeaderSize = sizeof(VOType) + sizeof(nFlagBits) + m_ID.DiskSizeIndexed();
 118
 119         sal_uInt8 tmpByte;
 120         sal_uInt16 tmpShort;
 121         switch (nFlagBits & VERSION_BITS)
 122         {
 123             case ONE_BYTE_VERSION:
 124                 rStrm.ReadUInt8( tmpByte );
 125                 nVersionID = static_cast<sal_uInt32>( tmpByte );
 126                 nHeaderSize++;
 127                 break;
 128
 129             case TWO_BYTE_VERSION:
 130                 rStrm.ReadUInt16( tmpShort );
 131                 nVersionID = static_cast<sal_uInt32>( tmpShort );
 132                 nHeaderSize += 2;
 133                 break;
 134
 135             case FOUR_BYTE_VERSION:
 136                 rStrm.ReadUInt32( nVersionID );
 137                 nHeaderSize += 4;
 138                 break;
 139             case DEFAULT_VERSION:   //fall through
 140             default:
 141                 nVersionID = 2;
 142                 break;      // nothing
 143         }
 144
 145         switch (nFlagBits & REFCOUNT_BITS)
 146         {
 147             case ONE_BYTE_REFCOUNT:
 148                 rStrm.ReadUInt8( tmpByte );
 149                 nRefCount = static_cast<sal_uInt32>( tmpByte );
 150                 nHeaderSize++;
 151                 break;
 152
 153             case TWO_BYTE_REFCOUNT:
 154                 rStrm.ReadUInt16( tmpShort );
 155                 nRefCount = static_cast<sal_uInt32>( tmpShort );
 156                 nHeaderSize += 2;
 157                 break;
 158
 159             case FOUR_BYTE_REFCOUNT:    //through
 160             default:
 161                 rStrm.ReadUInt32( nRefCount );
 162                 nHeaderSize += 4;
 163                 break;
 164         }
 165
 166         if (nFlagBits & HAS_PREVOFFSET)
 167         {
 168             rStrm.ReadUInt32( nNextVersionOffset );
 169             nHeaderSize += 4;
 170         }
 171         else
 172             nNextVersionOffset = BAD_OFFSET;
 173
 174         switch (nFlagBits & SIZE_BITS)
 175         {
 176             case ONE_BYTE_SIZE:
 177                 rStrm.ReadUInt8( tmpByte );
 178                 m_nSize = static_cast<sal_uInt32>( tmpByte );
 179                 nHeaderSize++;
 180                 break;
 181
 182             case TWO_BYTE_SIZE:
 183                 rStrm.ReadUInt16( tmpShort );
 184                 m_nSize = static_cast<sal_uInt32>(tmpShort);
 185                 nHeaderSize += 2;
 186                 break;
 187
 188             case FOUR_BYTE_SIZE:    //go through
 189             default:
 190                 rStrm.ReadUInt32( m_nSize );
 191                 nHeaderSize += 4;
 192                 break;
 193         }
 194
 195         if (nFlagBits & DATA_COMPRESSED)
 196         {
 197             m_bCompressed = true;
 198         }
 199     }
 200     sal_Int64 nEndPos = rStrm.Tell();
 201     return (nStartPos + nHeaderSize == nEndPos);
 202 }
 203
 204 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */