sot/source/sdstor/stgole.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <memory>
  21 #include <algorithm>
  22
  23 #include "stgelem.hxx"
  24 #include "stgole.hxx"
  25 #include <o3tl/safeint.hxx>
  26 #include <sot/storinfo.hxx>
  27
  28 ///////////////////////// class StgInternalStream
  29
  30 StgInternalStream::StgInternalStream( BaseStorage& rStg, const OUString& rName, bool bWr )
  31 {
  32     m_isWritable = true;
  33     StreamMode nMode = bWr
  34                  ? StreamMode::WRITE | StreamMode::SHARE_DENYALL
  35                  : StreamMode::READ | StreamMode::SHARE_DENYWRITE | StreamMode::NOCREATE;
  36     m_pStrm.reset( rStg.OpenStream( rName, nMode ) );
  37
  38     // set the error code right here in the stream
  39     SetError( rStg.GetError() );
  40     SetBufferSize( 1024 );
  41 }
  42
  43 StgInternalStream::~StgInternalStream()
  44 {
  45 }
  46
  47 std::size_t StgInternalStream::GetData(void* pData, std::size_t nSize)
  48 {
  49     if( m_pStrm )
  50     {
  51         nSize = m_pStrm->Read( pData, nSize );
  52         SetError( m_pStrm->GetError() );
  53         return nSize;
  54     }
  55     else
  56         return 0;
  57 }
  58
  59 std::size_t StgInternalStream::PutData(const void* pData, std::size_t nSize)
  60 {
  61     if( m_pStrm )
  62     {
  63         nSize = m_pStrm->Write( pData, nSize );
  64         SetError( m_pStrm->GetError() );
  65         return nSize;
  66     }
  67     else
  68         return 0;
  69 }
  70
  71 sal_uInt64 StgInternalStream::SeekPos(sal_uInt64 const nPos)
  72 {
  73     return m_pStrm ? m_pStrm->Seek( nPos ) : 0;
  74 }
  75
  76 void StgInternalStream::FlushData()
  77 {
  78     if( m_pStrm )
  79     {
  80         m_pStrm->Flush();
  81         SetError( m_pStrm->GetError() );
  82     }
  83 }
  84
  85 void StgInternalStream::Commit()
  86 {
  87     Flush();
  88     m_pStrm->Commit();
  89 }
  90
  91 ///////////////////////// class StgCompObjStream
  92
  93 StgCompObjStream::StgCompObjStream( BaseStorage& rStg, bool bWr )
  94     : StgInternalStream( rStg, "\1CompObj", bWr )
  95 {
  96 }
  97
  98 bool StgCompObjStream::Load()
  99 {
 100     memset( &m_aClsId, 0, sizeof( ClsId ) );
 101     m_nCbFormat = SotClipboardFormatId::NONE;
 102     m_aUserName.clear();
 103     if( GetError() != ERRCODE_NONE )
 104         return false;
 105     Seek( 8 );     // skip the first part
 106     sal_Int32 nMarker = 0;
 107     ReadInt32( nMarker );
 108     if( nMarker == -1 )
 109     {
 110         ReadClsId( *this, m_aClsId );
 111         sal_Int32 nLen1 = 0;
 112         ReadInt32( nLen1 );
 113         if ( nLen1 > 0 )
 114         {
 115             // higher bits are ignored
 116             sal_Int32 nStrLen = ::std::min( nLen1, sal_Int32(0xFFFE) );
 117
 118             std::unique_ptr<char[]> p(new char[ nStrLen+1 ]);
 119             p[nStrLen] = 0;
 120             if (ReadBytes( p.get(), nStrLen ) == o3tl::make_unsigned(nStrLen))
 121             {
 122                 //The encoding here is "ANSI", which is pretty useless seeing as
 123                 //the actual codepage used doesn't seem to be specified/stored
 124                 //anywhere :-(. Might as well pick 1252 and be consistent on
 125                 //all platforms and envs
 126                 //https://bz.apache.org/ooo/attachment.cgi?id=68668
 127                 //for a good edge-case example
 128                 m_aUserName = OUString(p.get(), nStrLen, RTL_TEXTENCODING_MS_1252);
 129                 m_nCbFormat = ReadClipboardFormat( *this );
 130             }
 131             else
 132                 SetError( SVSTREAM_GENERALERROR );
 133         }
 134     }
 135     return GetError() == ERRCODE_NONE;
 136 }
 137
 138 bool StgCompObjStream::Store()
 139 {
 140     if( GetError() != ERRCODE_NONE )
 141         return false;
 142     Seek( 0 );
 143     OString aAsciiUserName(OUStringToOString(m_aUserName, RTL_TEXTENCODING_MS_1252));
 144     WriteInt16( 1 );          // Version?
 145     WriteInt16( -2 );                     // 0xFFFE = Byte Order Indicator
 146     WriteInt32( 0x0A03 );         // Windows 3.10
 147     WriteInt32( -1 );
 148     WriteClsId( *this, m_aClsId );             // Class ID
 149     WriteInt32( aAsciiUserName.getLength() + 1 );
 150     WriteOString( aAsciiUserName );
 151     WriteUChar( 0 );             // string terminator
 152     WriteClipboardFormat( *this, m_nCbFormat );
 153     WriteInt32( 0 );             // terminator
 154     Commit();
 155     return GetError() == ERRCODE_NONE;
 156 }
 157
 158 /////////////////////////// class StgOleStream
 159
 160 StgOleStream::StgOleStream( BaseStorage& rStg )
 161     : StgInternalStream( rStg, "\1Ole", true )
 162 {
 163 }
 164
 165 bool StgOleStream::Store()
 166 {
 167     if( GetError() != ERRCODE_NONE )
 168         return false;
 169
 170     Seek( 0 );
 171     WriteInt32( 0x02000001 );         // OLE version, format
 172     WriteInt32( 0 );             // Object flags
 173     WriteInt32( 0 );                  // Update Options
 174     WriteInt32( 0 );                  // reserved
 175     WriteInt32( 0 );                 // Moniker 1
 176     Commit();
 177     return GetError() == ERRCODE_NONE;
 178 }
 179
 180 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */