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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <memory>
#include <algorithm>
#include "stgelem.hxx"
#include "stgole.hxx"
#include <o3tl/safeint.hxx>
#include <sot/storinfo.hxx>
///////////////////////// class StgInternalStream
StgInternalStream::StgInternalStream( BaseStorage& rStg, const OUString& rName, bool bWr )
{
m_isWritable = true;
StreamMode nMode = bWr
? StreamMode::WRITE | StreamMode::SHARE_DENYALL
: StreamMode::READ | StreamMode::SHARE_DENYWRITE | StreamMode::NOCREATE;
m_pStrm.reset( rStg.OpenStream( rName, nMode ) );
// set the error code right here in the stream
SetError( rStg.GetError() );
SetBufferSize( 1024 );
}
StgInternalStream::~StgInternalStream()
{
}
std::size_t StgInternalStream::GetData(void* pData, std::size_t nSize)
{
if( m_pStrm )
{
nSize = m_pStrm->Read( pData, nSize );
SetError( m_pStrm->GetError() );
return nSize;
}
else
return 0;
}
std::size_t StgInternalStream::PutData(const void* pData, std::size_t nSize)
{
if( m_pStrm )
{
nSize = m_pStrm->Write( pData, nSize );
SetError( m_pStrm->GetError() );
return nSize;
}
else
return 0;
}
sal_uInt64 StgInternalStream::SeekPos(sal_uInt64 const nPos)
{
return m_pStrm ? m_pStrm->Seek( nPos ) : 0;
}
void StgInternalStream::FlushData()
{
if( m_pStrm )
{
m_pStrm->Flush();
SetError( m_pStrm->GetError() );
}
}
void StgInternalStream::Commit()
{
Flush();
m_pStrm->Commit();
}
///////////////////////// class StgCompObjStream
StgCompObjStream::StgCompObjStream( BaseStorage& rStg, bool bWr )
: StgInternalStream( rStg, "\1CompObj", bWr )
{
}
bool StgCompObjStream::Load()
{
memset( &m_aClsId, 0, sizeof( ClsId ) );
m_nCbFormat = SotClipboardFormatId::NONE;
m_aUserName.clear();
if( GetError() != ERRCODE_NONE )
return false;
Seek( 8 ); // skip the first part
sal_Int32 nMarker = 0;
ReadInt32( nMarker );
if( nMarker == -1 )
{
ReadClsId( *this, m_aClsId );
sal_Int32 nLen1 = 0;
ReadInt32( nLen1 );
if ( nLen1 > 0 )
{
// higher bits are ignored
sal_Int32 nStrLen = ::std::min( nLen1, sal_Int32(0xFFFE) );
std::unique_ptr<char[]> p(new char[ nStrLen+1 ]);
p[nStrLen] = 0;
if (ReadBytes( p.get(), nStrLen ) == o3tl::make_unsigned(nStrLen))
{
//The encoding here is "ANSI", which is pretty useless seeing as
//the actual codepage used doesn't seem to be specified/stored
//anywhere :-(. Might as well pick 1252 and be consistent on
//all platforms and envs
//https://bz.apache.org/ooo/attachment.cgi?id=68668
//for a good edge-case example
m_aUserName = OUString(p.get(), nStrLen, RTL_TEXTENCODING_MS_1252);
m_nCbFormat = ReadClipboardFormat( *this );
}
else
SetError( SVSTREAM_GENERALERROR );
}
}
return GetError() == ERRCODE_NONE;
}
bool StgCompObjStream::Store()
{
if( GetError() != ERRCODE_NONE )
return false;
Seek( 0 );
OString aAsciiUserName(OUStringToOString(m_aUserName, RTL_TEXTENCODING_MS_1252));
WriteInt16( 1 ); // Version?
WriteInt16( -2 ); // 0xFFFE = Byte Order Indicator
WriteInt32( 0x0A03 ); // Windows 3.10
WriteInt32( -1 );
WriteClsId( *this, m_aClsId ); // Class ID
WriteInt32( aAsciiUserName.getLength() + 1 );
WriteOString( aAsciiUserName );
WriteUChar( 0 ); // string terminator
WriteClipboardFormat( *this, m_nCbFormat );
WriteInt32( 0 ); // terminator
Commit();
return GetError() == ERRCODE_NONE;
}
/////////////////////////// class StgOleStream
StgOleStream::StgOleStream( BaseStorage& rStg )
: StgInternalStream( rStg, "\1Ole", true )
{
}
bool StgOleStream::Store()
{
if( GetError() != ERRCODE_NONE )
return false;
Seek( 0 );
WriteInt32( 0x02000001 ); // OLE version, format
WriteInt32( 0 ); // Object flags
WriteInt32( 0 ); // Update Options
WriteInt32( 0 ); // reserved
WriteInt32( 0 ); // Moniker 1
Commit();
return GetError() == ERRCODE_NONE;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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