/* -*- 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 <filter/msfilter/dffrecordheader.hxx>

bool ReadDffRecordHeader( SvStream& rIn, DffRecordHeader& rRec )
{
    rRec.nFilePos = rIn.Tell();
    sal_uInt16 nTmp(0);
    rIn.ReadUInt16( nTmp );
    rRec.nImpVerInst = nTmp;
    rRec.nRecVer = sal::static_int_cast< sal_uInt8 >(nTmp & 0x000F);
    rRec.nRecInstance = nTmp >> 4;
    rIn.ReadUInt16( rRec.nRecType );
    rIn.ReadUInt32( rRec.nRecLen );

    // preserving overflow, optimally we would check
    // the record size against the parent header
    if ( rRec.nRecLen > ( SAL_MAX_UINT32 - rRec.nFilePos ) )
      rIn.SetError( SVSTREAM_FILEFORMAT_ERROR );

    return rIn.good();
}

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