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Diffstat (limited to 'sot/source/sdstor/stgole.cxx')
| -rw-r--r-- | sot/source/sdstor/stgole.cxx | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/sot/source/sdstor/stgole.cxx b/sot/source/sdstor/stgole.cxx new file mode 100644 index 000000000..ac23f7a14 --- /dev/null +++ b/sot/source/sdstor/stgole.cxx @@ -0,0 +1,180 @@ +/* -*- 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: */ |