1 files changed, 148 insertions, 0 deletions
diff --git a/sc/source/core/tool/rechead.cxx b/sc/source/core/tool/rechead.cxx
new file mode 100644
index 000000000..abd44d041
--- /dev/null
+++ b/sc/source/core/tool/rechead.cxx
@@ -0,0 +1,148 @@
+/* -*- 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 <rechead.hxx>
+#include <scerrors.hxx>
+
+#include <osl/diagnose.h>
+
+ScMultipleReadHeader::ScMultipleReadHeader(SvStream& rNewStream) :
+    rStream( rNewStream )
+{
+    sal_uInt32 nDataSize;
+    rStream.ReadUInt32( nDataSize );
+    sal_uInt64 nDataPos = rStream.Tell();
+    nTotalEnd = nDataPos + nDataSize;
+    nEntryEnd = nTotalEnd;
+
+    rStream.SeekRel(nDataSize);
+    sal_uInt16 nID;
+    rStream.ReadUInt16( nID );
+    if (nID != SCID_SIZES)
+    {
+        OSL_FAIL("SCID_SIZES not found");
+        if ( rStream.GetError() == ERRCODE_NONE )
+            rStream.SetError( SVSTREAM_FILEFORMAT_ERROR );
+
+        //  everything to 0, so  BytesLeft() aborts at least
+        pBuf = nullptr; pMemStream.reset();
+        nEntryEnd = nDataPos;
+    }
+    else
+    {
+        sal_uInt32 nSizeTableLen;
+        rStream.ReadUInt32( nSizeTableLen );
+        pBuf.reset( new sal_uInt8[nSizeTableLen] );
+        rStream.ReadBytes( pBuf.get(), nSizeTableLen );
+        pMemStream.reset(new SvMemoryStream( pBuf.get(), nSizeTableLen, StreamMode::READ ));
+    }
+
+    nEndPos = rStream.Tell();
+    rStream.Seek( nDataPos );
+}
+
+ScMultipleReadHeader::~ScMultipleReadHeader()
+{
+    if ( pMemStream && pMemStream->Tell() != pMemStream->GetEndOfData() )
+    {
+        OSL_FAIL( "Sizes not fully read" );
+        if ( rStream.GetError() == ERRCODE_NONE )
+            rStream.SetError( SCWARN_IMPORT_INFOLOST );
+    }
+    pMemStream.reset();
+
+    rStream.Seek(nEndPos);
+}
+
+void ScMultipleReadHeader::EndEntry()
+{
+    sal_uInt64 nPos = rStream.Tell();
+    OSL_ENSURE( nPos <= nEntryEnd, "read too much" );
+    if ( nPos != nEntryEnd )
+    {
+        if ( rStream.GetError() == ERRCODE_NONE )
+            rStream.SetError( SCWARN_IMPORT_INFOLOST );
+        rStream.Seek( nEntryEnd );          // ignore the rest
+    }
+
+    nEntryEnd = nTotalEnd;          // all remaining, if no StartEntry follows
+}
+
+void ScMultipleReadHeader::StartEntry()
+{
+    sal_uInt64 nPos = rStream.Tell();
+    sal_uInt32 nEntrySize;
+    (*pMemStream).ReadUInt32( nEntrySize );
+
+    nEntryEnd = nPos + nEntrySize;
+    OSL_ENSURE( nEntryEnd <= nTotalEnd, "read too many entries" );
+}
+
+sal_uInt64 ScMultipleReadHeader::BytesLeft() const
+{
+    sal_uInt64 nReadEnd = rStream.Tell();
+    if (nReadEnd <= nEntryEnd)
+        return nEntryEnd-nReadEnd;
+
+    OSL_FAIL("ScMultipleReadHeader::BytesLeft: Error");
+    return 0;
+}
+
+ScMultipleWriteHeader::ScMultipleWriteHeader(SvStream& rNewStream) :
+    rStream( rNewStream ),
+    aMemStream( 4096, 4096 )
+{
+    nDataSize = 0;
+    rStream.WriteUInt32( nDataSize );
+
+    nDataPos = rStream.Tell();
+    nEntryStart = nDataPos;
+}
+
+ScMultipleWriteHeader::~ScMultipleWriteHeader()
+{
+    sal_uInt64 nDataEnd = rStream.Tell();
+
+    rStream.WriteUInt16( SCID_SIZES );
+    rStream.WriteUInt32( aMemStream.Tell() );
+    rStream.WriteBytes( aMemStream.GetData(), aMemStream.Tell() );
+
+    if ( nDataEnd - nDataPos != nDataSize )                 // matched default ?
+    {
+        nDataSize = nDataEnd - nDataPos;
+        sal_uInt64 nPos = rStream.Tell();
+        rStream.Seek(nDataPos-sizeof(sal_uInt32));
+        rStream.WriteUInt32( nDataSize );                               // record size at the beginning
+        rStream.Seek(nPos);
+    }
+}
+
+void ScMultipleWriteHeader::EndEntry()
+{
+    sal_uInt64 nPos = rStream.Tell();
+    aMemStream.WriteUInt32( nPos - nEntryStart );
+}
+
+void ScMultipleWriteHeader::StartEntry()
+{
+    sal_uInt64 nPos = rStream.Tell();
+    nEntryStart = nPos;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */