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
  23  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  24  *  Lesser General Public License for more details.
  25  *
  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 #include "lwpobjhdr.hxx"
  62 #include "lwpdefs.hxx"
  63 #include "lwpfilehdr.hxx"
  64
  65 LwpObjectHeader::LwpObjectHeader()
  66     : m_nTag(0), m_ID(), m_nSize(0), m_bCompressed(false)
  67 {}
  68 /**
  69  * @descr  read header from stream
  70   */
  71 bool LwpObjectHeader::Read(LwpSvStream &rStrm)
  72 {
  73     sal_uInt32 nVersionID = 0;
  74     sal_uInt32 nRefCount = 0;
  75     sal_uInt32 nNextVersionOffset = 0;
  76     sal_uInt32 nHeaderSize = 0;
  77
  78     sal_Int64 nStartPos = rStrm.Tell();
  79
  80     if ( LwpFileHeader::m_nFileRevision < 0x000B)
  81     {
  82         rStrm.ReadUInt32( m_nTag );
  83         m_ID.Read(&rStrm);
  84         rStrm.ReadUInt32( nVersionID );
  85         rStrm.ReadUInt32( nRefCount );
  86         rStrm.ReadUInt32( nNextVersionOffset );
  87
  88         nHeaderSize = sizeof(m_nTag) + LwpObjectID::DiskSize()
  89             + sizeof(nVersionID)
  90             + sizeof(nRefCount)
  91             + sizeof(nNextVersionOffset)
  92             + sizeof(m_nSize);
  93
  94         if ((m_nTag == TAG_AMI) || ( LwpFileHeader::m_nFileRevision < 0x0006))
  95         {
  96             sal_uInt32 nNextVersionID = 0;
  97             rStrm.ReadUInt32( nNextVersionID );
  98             nHeaderSize += sizeof(nNextVersionID);
  99         }
 100         rStrm.ReadUInt32( m_nSize );
 101     }
 102     else
 103     {
 104         sal_uInt8 nFlagBits = 0;
 105         sal_uInt16 VOType = 0;
 106         rStrm.ReadUInt16( VOType );
 107         rStrm.ReadUInt8( nFlagBits );
 108
 109         m_nTag = static_cast<sal_uInt32>(VOType);
 110         m_ID.ReadIndexed(&rStrm);
 111         nHeaderSize = sizeof(VOType) + sizeof(nFlagBits) + m_ID.DiskSizeIndexed();
 112
 113         sal_uInt8 tmpByte;
 114         sal_uInt16 tmpShort;
 115         switch (nFlagBits & VERSION_BITS)
 116         {
 117             case ONE_BYTE_VERSION:
 118                 rStrm.ReadUInt8( tmpByte );
 119                 nVersionID = static_cast<sal_uInt32>( tmpByte );
 120                 nHeaderSize++;
 121                 break;
 122
 123             case TWO_BYTE_VERSION:
 124                 rStrm.ReadUInt16( tmpShort );
 125                 nVersionID = static_cast<sal_uInt32>( tmpShort );
 126                 nHeaderSize += 2;
 127                 break;
 128
 129             case FOUR_BYTE_VERSION:
 130                 rStrm.ReadUInt32( nVersionID );
 131                 nHeaderSize += 4;
 132                 break;
 133             case DEFAULT_VERSION:   //fall through
 134             default:
 135                 nVersionID = 2;
 136                 break;      // nothing
 137         }
 138
 139         switch (nFlagBits & REFCOUNT_BITS)
 140         {
 141             case ONE_BYTE_REFCOUNT:
 142                 rStrm.ReadUInt8( tmpByte );
 143                 nRefCount = static_cast<sal_uInt32>( tmpByte );
 144                 nHeaderSize++;
 145                 break;
 146
 147             case TWO_BYTE_REFCOUNT:
 148                 rStrm.ReadUInt16( tmpShort );
 149                 nRefCount = static_cast<sal_uInt32>( tmpShort );
 150                 nHeaderSize += 2;
 151                 break;
 152
 153             case FOUR_BYTE_REFCOUNT:    //through
 154             default:
 155                 rStrm.ReadUInt32( nRefCount );
 156                 nHeaderSize += 4;
 157                 break;
 158         }
 159
 160         if (nFlagBits & HAS_PREVOFFSET)
 161         {
 162             rStrm.ReadUInt32( nNextVersionOffset );
 163             nHeaderSize += 4;
 164         }
 165         else
 166             nNextVersionOffset = BAD_OFFSET;
 167
 168         switch (nFlagBits & SIZE_BITS)
 169         {
 170             case ONE_BYTE_SIZE:
 171                 rStrm.ReadUInt8( tmpByte );
 172                 m_nSize = static_cast<sal_uInt32>( tmpByte );
 173                 nHeaderSize++;
 174                 break;
 175
 176             case TWO_BYTE_SIZE:
 177                 rStrm.ReadUInt16( tmpShort );
 178                 m_nSize = static_cast<sal_uInt32>(tmpShort);
 179                 nHeaderSize += 2;
 180                 break;
 181
 182             case FOUR_BYTE_SIZE:    //go through
 183             default:
 184                 rStrm.ReadUInt32( m_nSize );
 185                 nHeaderSize += 4;
 186                 break;
 187         }
 188
 189         if (nFlagBits & DATA_COMPRESSED)
 190         {
 191             m_bCompressed = true;
 192         }
 193     }
 194     sal_Int64 nEndPos = rStrm.Tell();
 195     return (nStartPos + nHeaderSize == nEndPos);
 196 }
 197
 198 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */