Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 939 insertions, 0 deletions

diff --git a/sot/source/sdstor/stg.cxx b/sot/source/sdstor/stg.cxx
new file mode 100644
index 000000000..08af34309
--- /dev/null
+++ b/sot/source/sdstor/stg.cxx
@@ -0,0 +1,939 @@
+/* -*- 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 <sot/storinfo.hxx>
+#include <osl/file.hxx>
+#include <unotools/tempfile.hxx>
+#include <tools/stream.hxx>
+#include <tools/debug.hxx>
+
+#include <sot/stg.hxx>
+#include <utility>
+#include "stgelem.hxx"
+#include "stgdir.hxx"
+#include "stgio.hxx"
+#include "stgole.hxx"
+
+static tools::Long nTmpCount = 0;
+
+// The internal open mode is StreamMode::READ | StreamMode::TRUNC, which is silly
+// by itself. It inhibits the checking of sharing modes and is used
+// during CopyTo() and MoveTo() for opening a stream in read mode
+// although it may be open in DENYALL mode
+
+#define INTERNAL_MODE ( StreamMode::READ | StreamMode::TRUNC )
+
+///////////////////////// class StorageBase
+
+
+StorageBase::StorageBase()
+    : m_bAutoCommit( false )
+{
+    m_nMode  = StreamMode::READ;
+    m_nError = ERRCODE_NONE;
+}
+
+StorageBase::~StorageBase()
+{
+}
+
+// The following three methods are declared as const, since they
+// may be called from within a const method.
+
+ErrCode StorageBase::GetError() const
+{
+    const ErrCode n = m_nError;
+    m_nError = ERRCODE_NONE;
+    return n;
+}
+
+void StorageBase::SetError( ErrCode n ) const
+{
+    if( !m_nError )
+        m_nError = n;
+}
+
+void StorageBase::ResetError() const
+{
+    m_nError = ERRCODE_NONE;
+}
+
+OLEStorageBase::OLEStorageBase( StgIo* p, StgDirEntry* pe, StreamMode& nMode )
+    : nStreamMode( nMode ), pIo( p ), pEntry( pe )
+{
+    if ( p )
+        p->IncRef();
+    if( pe )
+        pe->m_nRefCnt++;
+}
+
+OLEStorageBase::~OLEStorageBase()
+{
+    if( pEntry )
+    {
+        DBG_ASSERT( pEntry->m_nRefCnt, "RefCount under 0" );
+        if( !--pEntry->m_nRefCnt )
+        {
+            if( pEntry->m_bZombie )
+                delete pEntry;
+            else
+                pEntry->Close();
+        }
+
+        pEntry = nullptr;
+    }
+
+
+    if( pIo && !pIo->DecRef() )
+    {
+        delete pIo;
+        pIo = nullptr;
+    }
+}
+
+// Validate the instance for I/O
+
+bool OLEStorageBase::Validate_Impl( bool bWrite ) const
+{
+    return pIo
+        && pIo->m_pTOC
+        && pEntry
+        && !pEntry->m_bInvalid
+        &&  ( !bWrite || !pEntry->m_bDirect || ( nStreamMode & StreamMode::WRITE ) );
+}
+
+bool OLEStorageBase::ValidateMode_Impl( StreamMode m, StgDirEntry const * p )
+{
+    if( m == INTERNAL_MODE )
+        return true;
+    StreamMode nCurMode = ( p && p->m_nRefCnt ) ? p->m_nMode : StreamMode::SHARE_DENYALL;
+    if( ( m & StreamMode::READWRITE ) == StreamMode::READ )
+    {
+        // only SHARE_DENYWRITE or SHARE_DENYALL allowed
+        if( ( ( m & StreamMode::SHARE_DENYWRITE )
+           && ( nCurMode & StreamMode::SHARE_DENYWRITE ) )
+         || ( ( m & StreamMode::SHARE_DENYALL )
+           && ( nCurMode & StreamMode::SHARE_DENYALL ) ) )
+            return true;
+    }
+    else
+    {
+        // only SHARE_DENYALL allowed
+        // storages open in r/o mode are OK, since only
+        // the commit may fail
+        if( ( m & StreamMode::SHARE_DENYALL )
+         && ( nCurMode & StreamMode::SHARE_DENYALL ) )
+            return true;
+    }
+    return false;
+}
+
+
+//////////////////////// class StorageStream
+
+
+StorageStream::StorageStream( StgIo* p, StgDirEntry* q, StreamMode m )
+             : OLEStorageBase( p, q, m_nMode ), nPos( 0 )
+{
+    // The dir entry may be 0; this means that the stream is invalid.
+    if( q && p )
+    {
+        if( q->m_nRefCnt == 1 )
+        {
+            q->m_nMode = m;
+            q->OpenStream( *p );
+        }
+    }
+    else
+        m &= ~StreamMode::READWRITE;
+    m_nMode = m;
+}
+
+StorageStream::~StorageStream()
+{
+    // Do an auto-commit if the entry is open in direct mode
+    if( m_bAutoCommit )
+        Commit();
+    if( pEntry && pEntry->m_nRefCnt && pEntry->m_bDirect && (m_nMode & StreamMode::WRITE) )
+        pEntry->Commit();
+}
+
+bool StorageStream::Equals( const BaseStorageStream& rStream ) const
+{
+    const StorageStream* pOther =  dynamic_cast<const StorageStream*>( &rStream );
+    return pOther && ( pOther->pEntry == pEntry );
+}
+
+sal_Int32 StorageStream::Read( void* pData, sal_Int32 nSize )
+{
+    if( Validate() )
+    {
+        pEntry->Seek( nPos );
+        nSize = pEntry->Read( pData, nSize );
+        pIo->MoveError( *this );
+        nPos += nSize;
+    }
+    else
+        nSize = 0;
+    return nSize;
+}
+
+sal_Int32 StorageStream::Write( const void* pData, sal_Int32 nSize )
+{
+    if( Validate( true ) )
+    {
+        pEntry->Seek( nPos );
+        nSize = pEntry->Write( pData, nSize );
+        pIo->MoveError( *this );
+        nPos += nSize;
+    }
+    else
+        nSize = 0;
+    return nSize;
+}
+
+sal_uInt64 StorageStream::Seek( sal_uInt64 n )
+{
+    if( Validate() )
+    {
+        nPos = pEntry->Seek( n );
+        return nPos;
+    }
+    else
+        return n;
+}
+
+void StorageStream::Flush()
+{
+    // Flushing means committing, since streams are never transacted
+    Commit();
+}
+
+bool StorageStream::SetSize( sal_uInt64 nNewSize )
+{
+    if( Validate( true ) )
+    {
+        bool b = pEntry->SetSize( nNewSize );
+        pIo->MoveError( *this );
+        return b;
+    }
+    else
+        return false;
+}
+
+sal_uInt64 StorageStream::GetSize() const
+{
+    if( Validate() )
+        return pEntry->GetSize();
+    return 0;
+}
+
+bool StorageStream::Commit()
+{
+    if( !Validate() )
+        return false;
+    if( !( m_nMode & StreamMode::WRITE ) )
+    {
+        SetError( SVSTREAM_ACCESS_DENIED );
+        return false;
+    }
+    else
+    {
+        pEntry->Commit();
+        pIo->MoveError( *this );
+        return Good();
+    }
+}
+
+void StorageStream::CopyTo( BaseStorageStream* pDest )
+{
+    if( !Validate() || !pDest || !pDest->Validate( true ) || Equals( *pDest ) )
+        return;
+    pEntry->Copy( *pDest );
+    pDest->Commit();
+    pIo->MoveError( *this );
+    SetError( pDest->GetError() );
+}
+
+bool StorageStream::Validate( bool bValidate ) const
+{
+    bool bRet = Validate_Impl( bValidate );
+    if ( !bRet )
+        SetError( SVSTREAM_ACCESS_DENIED );
+    return bRet;
+}
+
+bool StorageStream::ValidateMode( StreamMode nMode ) const
+{
+    bool bRet = ValidateMode_Impl( nMode );
+    if ( !bRet )
+        SetError( SVSTREAM_ACCESS_DENIED );
+    return bRet;
+}
+
+///////////////////////// class SvStorageInfo
+
+SvStorageInfo::SvStorageInfo( const StgDirEntry& rE )
+{
+    rE.m_aEntry.GetName( aName );
+    bStorage = rE.m_aEntry.GetType() == STG_STORAGE;
+    bStream  = rE.m_aEntry.GetType() == STG_STREAM;
+    nSize    = bStorage ? 0 : rE.m_aEntry.GetSize();
+}
+
+/////////////////////////// class Storage
+
+bool Storage::IsStorageFile( const OUString & rFileName )
+{
+    StgIo aIo;
+    if( aIo.Open( rFileName, StreamMode::STD_READ ) )
+        return aIo.Load();
+    return false;
+}
+
+bool Storage::IsStorageFile( SvStream* pStream )
+{
+    bool bRet = false;
+
+    if ( pStream )
+    {
+        StgHeader aHdr;
+        sal_uInt64 nPos = pStream->Tell();
+        bRet = ( aHdr.Load( *pStream ) && aHdr.Check() );
+
+        // It's not a stream error if it is too small for an OLE storage header
+        if ( pStream->GetErrorCode() == ERRCODE_IO_CANTSEEK )
+            pStream->ResetError();
+        pStream->Seek( nPos );
+    }
+
+    return bRet;
+}
+
+// Open the storage file. If writing is permitted and the file is not
+// a storage file, initialize it.
+
+
+Storage::Storage( OUString aFile, StreamMode m, bool bDirect )
+    : OLEStorageBase( new StgIo, nullptr, m_nMode )
+    , aName(std::move( aFile )), bIsRoot( false )
+{
+    bool bTemp = false;
+    if( aName.isEmpty() )
+    {
+        // no name = temporary name!
+        aName = utl::TempFile::CreateTempName();
+        bTemp = true;
+    }
+    // the root storage creates the I/O system
+    m_nMode = m;
+    if( pIo->Open( aName, m ) )
+    {
+        Init( ( m & ( StreamMode::TRUNC | StreamMode::NOCREATE ) ) == StreamMode::TRUNC );
+        if( pEntry )
+        {
+            pEntry->m_bDirect = bDirect;
+            pEntry->m_nMode = m;
+            pEntry->m_bTemp = bTemp;
+        }
+    }
+    else
+    {
+        pIo->MoveError( *this );
+        pEntry = nullptr;
+    }
+}
+
+// Create a storage on a given stream.
+
+Storage::Storage( SvStream& r, bool bDirect )
+    : OLEStorageBase( new StgIo, nullptr, m_nMode )
+    , bIsRoot( false )
+{
+    m_nMode = StreamMode::READ;
+    if( r.IsWritable() )
+        m_nMode = StreamMode::READ | StreamMode::WRITE;
+    if( r.GetError() == ERRCODE_NONE )
+    {
+        pIo->SetStrm( &r, false );
+        sal_uInt64 nSize = r.TellEnd();
+        r.Seek( 0 );
+        // Initializing is OK if the stream is empty
+        Init( nSize == 0 );
+        if( pEntry )
+        {
+            pEntry->m_bDirect = bDirect;
+            pEntry->m_nMode = m_nMode;
+        }
+        pIo->MoveError( *this );
+    }
+    else
+    {
+        SetError( r.GetError() );
+        pEntry = nullptr;
+    }
+}
+
+
+Storage::Storage( UCBStorageStream& rStrm, bool bDirect )
+       : OLEStorageBase( new StgIo, nullptr, m_nMode ), bIsRoot( false )
+{
+    m_nMode = StreamMode::READ;
+
+    if ( rStrm.GetError() != ERRCODE_NONE )
+    {
+        SetError( rStrm.GetError() );
+        pEntry = nullptr;
+        return;
+    }
+
+    SvStream* pStream = rStrm.GetModifySvStream();
+    if ( !pStream )
+    {
+        OSL_FAIL( "UCBStorageStream can not provide SvStream implementation!" );
+        SetError( SVSTREAM_GENERALERROR );
+        pEntry = nullptr;
+        return;
+    }
+
+    if( pStream->IsWritable() )
+        m_nMode = StreamMode::READ | StreamMode::WRITE;
+
+    pIo->SetStrm( &rStrm );
+
+    sal_uInt64 nSize = pStream->TellEnd();
+    pStream->Seek( 0 );
+    // Initializing is OK if the stream is empty
+    Init( nSize == 0 );
+    if( pEntry )
+    {
+        pEntry->m_bDirect = bDirect;
+        pEntry->m_nMode = m_nMode;
+    }
+
+    pIo->MoveError( *this );
+}
+
+
+// Perform common code for both ctors above.
+
+void Storage::Init( bool bCreate )
+{
+    pEntry = nullptr;
+    bool bHdrLoaded = false;
+    bIsRoot = true;
+
+    OSL_ENSURE( pIo, "The pointer may not be empty at this point!" );
+    if( pIo->Good() && pIo->GetStrm() )
+    {
+        sal_uInt64 nSize = pIo->GetStrm()->TellEnd();
+        pIo->GetStrm()->Seek( 0 );
+        if( nSize )
+        {
+            bHdrLoaded = pIo->Load();
+            if( !bHdrLoaded && !bCreate  )
+            {
+                // File is not a storage and not empty; do not destroy!
+                SetError( SVSTREAM_FILEFORMAT_ERROR );
+                return;
+            }
+        }
+    }
+    // file is a storage, empty or should be overwritten
+    pIo->ResetError();
+    // we have to set up the data structures, since
+    // the file is empty
+    if( !bHdrLoaded )
+        pIo->Init();
+    if( pIo->Good() && pIo->m_pTOC )
+    {
+        pEntry = pIo->m_pTOC->GetRoot();
+        pEntry->m_nRefCnt++;
+    }
+}
+
+// Internal ctor
+
+Storage::Storage( StgIo* p, StgDirEntry* q, StreamMode m )
+       : OLEStorageBase( p, q, m_nMode ), bIsRoot( false )
+{
+    if( q )
+        q->m_aEntry.GetName( aName );
+    else
+        m &= ~StreamMode::READWRITE;
+    m_nMode   = m;
+    if( q && q->m_nRefCnt == 1 )
+        q->m_nMode = m;
+}
+
+Storage::~Storage()
+{
+    // Invalidate all open substorages
+    if( m_bAutoCommit )
+        Commit();
+    if( pEntry )
+    {
+        // Do an auto-commit if the entry is open in direct mode
+        if( pEntry->m_nRefCnt && pEntry->m_bDirect && (m_nMode & StreamMode::WRITE) )
+            Commit();
+        if( pEntry->m_nRefCnt == 1 )
+            pEntry->Invalidate(false);
+    }
+    // close the stream is root storage
+    if( bIsRoot )
+        pIo->Close();
+    // remove the file if temporary root storage
+    if( bIsRoot && pEntry && pEntry->m_bTemp )
+    {
+        osl::File::remove( GetName() );
+    }
+}
+
+const OUString& Storage::GetName() const
+{
+    if( !bIsRoot && Validate() )
+        pEntry->m_aEntry.GetName( const_cast<Storage*>(this)->aName );
+    return aName;
+}
+
+// Fill in the info list for this storage
+
+void Storage::FillInfoList( SvStorageInfoList* pList ) const
+{
+    if( !(Validate() && pList) )
+        return;
+
+    StgIterator aIter( *pEntry );
+    StgDirEntry* p = aIter.First();
+    while( p )
+    {
+        if( !p->m_bInvalid )
+        {
+            SvStorageInfo aInfo( *p );
+            pList->push_back( aInfo );
+        }
+        p = aIter.Next();
+    }
+}
+
+// Open or create a substorage
+
+BaseStorage* Storage::OpenUCBStorage( const OUString& rName, StreamMode m, bool bDirect )
+{
+    OSL_FAIL("Not supported!");
+    return OpenStorage( rName, m, bDirect );
+}
+
+BaseStorage* Storage::OpenOLEStorage( const OUString& rName, StreamMode m, bool bDirect )
+{
+    return OpenStorage( rName, m, bDirect );
+}
+
+BaseStorage* Storage::OpenStorage( const OUString& rName, StreamMode m, bool bDirect )
+{
+    if( !Validate() || !ValidateMode( m ) )
+        return new Storage( pIo, nullptr, m );
+    if( bDirect && !pEntry->m_bDirect )
+        bDirect = false;
+
+    StgDirEntry* p = StgDirStrm::Find( *pEntry, rName );
+    if( !p )
+    {
+        if( !( m & StreamMode::NOCREATE ) )
+        {
+            bool bTemp = false;
+            // create a new storage
+            OUString aNewName = rName;
+            if( aNewName.isEmpty() )
+            {
+                aNewName = "Temp Stg " + OUString::number( ++nTmpCount );
+                bTemp = true;
+            }
+            p = pIo->m_pTOC->Create( *pEntry, aNewName, STG_STORAGE );
+            if( p )
+                p->m_bTemp = bTemp;
+        }
+        if( !p )
+            pIo->SetError( ( m & StreamMode::WRITE )
+                             ? SVSTREAM_CANNOT_MAKE : SVSTREAM_FILE_NOT_FOUND );
+    }
+    else if( !ValidateMode( m, p ) )
+        p = nullptr;
+    if( p && p->m_aEntry.GetType() != STG_STORAGE )
+    {
+        pIo->SetError( SVSTREAM_FILE_NOT_FOUND );
+        p = nullptr;
+    }
+
+    // Either direct or transacted mode is supported
+    if( p && pEntry->m_nRefCnt == 1 )
+        p->m_bDirect = bDirect;
+
+    // Don't check direct conflict if opening readonly
+    if( p && (m & StreamMode::WRITE ))
+    {
+        if( p->m_bDirect != bDirect )
+            SetError( SVSTREAM_ACCESS_DENIED );
+    }
+    Storage* pStg = new Storage( pIo, p, m );
+    pIo->MoveError( *pStg );
+    if( m & StreamMode::WRITE ) pStg->m_bAutoCommit = true;
+    return pStg;
+}
+
+// Open a stream
+
+BaseStorageStream* Storage::OpenStream( const OUString& rName, StreamMode m, bool )
+{
+    if( !Validate() || !ValidateMode( m ) )
+        return new StorageStream( pIo, nullptr, m );
+    StgDirEntry* p = StgDirStrm::Find( *pEntry, rName );
+    bool bTemp = false;
+    if( !p )
+    {
+        if( !( m & StreamMode::NOCREATE ) )
+        {
+            // create a new stream
+            // make a name if the stream is temporary (has no name)
+            OUString aNewName( rName );
+            if( aNewName.isEmpty() )
+            {
+                aNewName = "Temp Strm " + OUString::number( ++nTmpCount );
+                bTemp = true;
+            }
+            p = pIo->m_pTOC->Create( *pEntry, aNewName, STG_STREAM );
+        }
+        if( !p )
+            pIo->SetError( ( m & StreamMode::WRITE )
+                           ? SVSTREAM_CANNOT_MAKE : SVSTREAM_FILE_NOT_FOUND );
+    }
+    else if( !ValidateMode( m, p ) )
+        p = nullptr;
+    // coverity[Resource leak : FALSE] - "Create" method is called with STG_STREAM line 620,
+    // so we won't enter into this "if" block here.
+    if( p && p->m_aEntry.GetType() != STG_STREAM )
+    {
+        pIo->SetError( SVSTREAM_FILE_NOT_FOUND );
+        p = nullptr;
+    }
+    if( p )
+    {
+        p->m_bTemp = bTemp;
+        p->m_bDirect = pEntry->m_bDirect;
+    }
+    StorageStream* pStm = new StorageStream( pIo, p, m );
+    if( p && !p->m_bDirect )
+        pStm->SetAutoCommit( true );
+    pIo->MoveError( *pStm );
+    return pStm;
+}
+
+// Delete a stream or substorage by setting the temp bit.
+
+void Storage::Remove( const OUString& rName )
+{
+    if( !Validate( true ) )
+        return;
+    StgDirEntry* p = StgDirStrm::Find( *pEntry, rName );
+    if( p )
+    {
+        p->Invalidate( true );
+    }
+    else
+    {
+        SetError( SVSTREAM_FILE_NOT_FOUND );
+    }
+}
+
+// Copy one element
+
+bool Storage::CopyTo( const OUString& rElem, BaseStorage* pDest, const OUString& rNew )
+{
+    if( !Validate() || !pDest || !pDest->Validate( true ) )
+        return false;
+    StgDirEntry* pElem = StgDirStrm::Find( *pEntry, rElem );
+    if( pElem )
+    {
+        if( pElem->m_aEntry.GetType() == STG_STORAGE )
+        {
+            // copy the entire storage
+            tools::SvRef<BaseStorage> p1 = OpenStorage( rElem, INTERNAL_MODE );
+            tools::SvRef<BaseStorage> p2 = pDest->OpenOLEStorage( rNew, StreamMode::WRITE | StreamMode::SHARE_DENYALL, pEntry->m_bDirect );
+
+            if ( p2 )
+            {
+                ErrCode nTmpErr = p2->GetError();
+                if( !nTmpErr )
+                {
+                    p2->SetClassId( p1->GetClassId() );
+                    p1->CopyTo( p2.get() );
+                    SetError( p1->GetError() );
+
+                    nTmpErr = p2->GetError();
+                    if( !nTmpErr )
+                        p2->Commit();
+                    else
+                        pDest->SetError( nTmpErr );
+                }
+                else
+                    pDest->SetError( nTmpErr );
+            }
+
+            return Good() && pDest->Good();
+        }
+        else
+        {
+            // stream copy
+            tools::SvRef<BaseStorageStream> p1 = OpenStream( rElem, INTERNAL_MODE );
+            tools::SvRef<BaseStorageStream> p2 = pDest->OpenStream( rNew, StreamMode::WRITE | StreamMode::SHARE_DENYALL, pEntry->m_bDirect );
+
+            if ( p2 )
+            {
+                ErrCode nTmpErr = p2->GetError();
+                if( !nTmpErr )
+                {
+                    p1->CopyTo( p2.get() );
+                    SetError( p1->GetError() );
+
+                    nTmpErr = p2->GetError();
+                    if( !nTmpErr )
+                        p2->Commit();
+                    else
+                        pDest->SetError( nTmpErr );
+                }
+                else
+                    pDest->SetError( nTmpErr );
+            }
+
+            return Good() && pDest->Good();
+        }
+    }
+    SetError( SVSTREAM_FILE_NOT_FOUND );
+    return false;
+}
+
+bool Storage::CopyTo( BaseStorage* pDest ) const
+{
+    if( !Validate() || !pDest || !pDest->Validate( true ) || Equals( *pDest ) )
+    {
+        SetError( SVSTREAM_ACCESS_DENIED );
+        return false;
+    }
+    Storage* pThis = const_cast<Storage*>(this);
+    pDest->SetClassId( GetClassId() );
+    pDest->SetDirty();
+    SvStorageInfoList aList;
+    FillInfoList( &aList );
+    bool bRes = true;
+    for( size_t i = 0; i < aList.size() && bRes; i++ )
+    {
+        SvStorageInfo& rInfo = aList[ i ];
+        bRes = pThis->CopyTo( rInfo.GetName(), pDest, rInfo.GetName() );
+    }
+    if( !bRes )
+        SetError( pDest->GetError() );
+    return Good() && pDest->Good();
+}
+
+bool Storage::IsStorage( const OUString& rName ) const
+{
+    if( Validate() )
+    {
+        StgDirEntry* p = StgDirStrm::Find( *pEntry, rName );
+        if( p )
+            return p->m_aEntry.GetType() == STG_STORAGE;
+    }
+    return false;
+}
+
+bool Storage::IsStream( const OUString& rName ) const
+{
+    if( Validate() )
+    {
+        StgDirEntry* p = StgDirStrm::Find( *pEntry, rName );
+        if( p )
+            return p->m_aEntry.GetType() == STG_STREAM;
+    }
+    return false;
+}
+
+bool Storage::IsContained( const OUString& rName ) const
+{
+    if( Validate() )
+        return StgDirStrm::Find( *pEntry, rName ) != nullptr;
+    else
+        return false;
+}
+
+// Commit all sub-elements within this storage. If this is
+// the root, commit the FAT, the TOC and the header as well.
+
+bool Storage::Commit()
+{
+    bool bRes = true;
+    if( !Validate() )
+        return false;
+    if( !( m_nMode & StreamMode::WRITE ) )
+    {
+        SetError( SVSTREAM_ACCESS_DENIED );
+        return false;
+    }
+    else
+    {
+        // Also commit the sub-streams and Storages
+        StgIterator aIter( *pEntry );
+        for( StgDirEntry* p = aIter.First(); p && bRes; p = aIter.Next() )
+            bRes = p->Commit();
+        if( bRes && bIsRoot )
+        {
+            bRes = pEntry->Commit();
+            if( bRes )
+                bRes = pIo->CommitAll();
+        }
+        pIo->MoveError( *this );
+    }
+    return bRes;
+}
+
+bool Storage::Revert()
+{
+    return true;
+}
+
+///////////////////////////// OLE Support
+
+// Set the storage type
+
+void Storage::SetClass( const SvGlobalName & rClass,
+                        SotClipboardFormatId nOriginalClipFormat,
+                        const OUString & rUserTypeName )
+{
+    if( Validate( true ) )
+    {
+        // set the class name in the root entry
+        pEntry->m_aEntry.SetClassId( rClass.GetCLSID() );
+        pEntry->SetDirty();
+        // then create the streams
+        StgCompObjStream aCompObj( *this, true );
+        aCompObj.GetClsId() = rClass.GetCLSID();
+        aCompObj.GetCbFormat() = nOriginalClipFormat;
+        aCompObj.GetUserName() = rUserTypeName;
+        if( !aCompObj.Store() )
+            SetError( aCompObj.GetError() );
+        else
+        {
+            StgOleStream aOle(*this);
+            if( !aOle.Store() )
+                SetError( aOle.GetError() );
+        }
+    }
+    else
+        SetError( SVSTREAM_ACCESS_DENIED );
+}
+
+SvGlobalName Storage::GetClassName()
+{
+    StgCompObjStream aCompObj( *this, false );
+    if( aCompObj.Load() )
+        return SvGlobalName( aCompObj.GetClsId() );
+    pIo->ResetError();
+
+    if ( pEntry )
+        return SvGlobalName( pEntry->m_aEntry.GetClassId() );
+
+    return SvGlobalName();
+}
+
+SotClipboardFormatId Storage::GetFormat()
+{
+    StgCompObjStream aCompObj( *this, false );
+    if( aCompObj.Load() )
+        return aCompObj.GetCbFormat();
+    pIo->ResetError();
+    return SotClipboardFormatId::NONE;
+}
+
+OUString Storage::GetUserName()
+{
+    StgCompObjStream aCompObj( *this, false );
+    if( aCompObj.Load() )
+        return aCompObj.GetUserName();
+    pIo->ResetError();
+    return OUString();
+}
+
+bool Storage::ValidateFAT()
+{
+    FatError nErr = pIo->ValidateFATs();
+    return nErr == FatError::Ok;
+}
+
+void Storage::SetDirty()
+{
+    if ( pEntry )
+        pEntry->SetDirty();
+}
+
+void Storage::SetClassId( const ClsId& rId )
+{
+    if ( pEntry )
+        pEntry->m_aEntry.SetClassId( rId );
+}
+
+const ClsId& Storage::GetClassId() const
+{
+    if ( pEntry )
+        return pEntry->m_aEntry.GetClassId();
+
+    static const ClsId aDummyId = {0,0,0,{0,0,0,0,0,0,0,0}};
+    return aDummyId;
+}
+
+bool Storage::Validate( bool bValidate ) const
+{
+    bool bRet = Validate_Impl( bValidate );
+    if ( !bRet )
+        SetError( SVSTREAM_ACCESS_DENIED );
+    return bRet;
+}
+
+bool Storage::ValidateMode( StreamMode nMode ) const
+{
+    bool bRet = ValidateMode_Impl( nMode );
+    if ( !bRet )
+        SetError( SVSTREAM_ACCESS_DENIED );
+    return bRet;
+}
+
+bool Storage::ValidateMode( StreamMode nMode, StgDirEntry const * p ) const
+{
+    bool bRet = ValidateMode_Impl( nMode, p );
+    if ( !bRet )
+        SetError( SVSTREAM_ACCESS_DENIED );
+    return bRet;
+}
+
+bool Storage::Equals( const BaseStorage& rStorage ) const
+{
+    const Storage* pOther =  dynamic_cast<const Storage*>( &rStorage );
+    return pOther && ( pOther->pEntry == pEntry );
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */