Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include "biffhelper.hxx"
      21             : 
      22             : #include <rtl/math.hxx>
      23             : #include <rtl/tencinfo.h>
      24             : #include <osl/diagnose.h>
      25             : #include "biffinputstream.hxx"
      26             : #include "worksheethelper.hxx"
      27             : #include <oox/helper/binaryoutputstream.hxx>
      28             : 
      29             : namespace oox {
      30             : namespace xls {
      31             : 
      32             : namespace {
      33             : 
      34             : const sal_Int32 BIFF_RK_100FLAG             = 0x00000001;
      35             : const sal_Int32 BIFF_RK_INTFLAG             = 0x00000002;
      36             : const sal_Int32 BIFF_RK_VALUEMASK           = 0xFFFFFFFC;
      37             : 
      38             : union DecodedDouble
      39             : {
      40             :     double              mfValue;
      41             :     sal_math_Double     maStruct;
      42             : 
      43           0 :     inline explicit     DecodedDouble() {}
      44           2 :     inline explicit     DecodedDouble( double fValue ) : mfValue( fValue ) {}
      45             : };
      46             : 
      47             : } // namespace
      48             : 
      49             : // conversion -----------------------------------------------------------------
      50             : 
      51           2 : /*static*/ double BiffHelper::calcDoubleFromRk( sal_Int32 nRkValue )
      52             : {
      53           2 :     DecodedDouble aDecDbl( 0.0 );
      54           2 :     if( getFlag( nRkValue, BIFF_RK_INTFLAG ) )
      55             :     {
      56           0 :         sal_Int32 nTemp = nRkValue >> 2;
      57           0 :         setFlag< sal_Int32 >( nTemp, 0xE0000000, nRkValue < 0 );
      58           0 :         aDecDbl.mfValue = nTemp;
      59             :     }
      60             :     else
      61             :     {
      62           2 :         aDecDbl.maStruct.w32_parts.msw = static_cast< sal_uInt32 >( nRkValue & BIFF_RK_VALUEMASK );
      63             :     }
      64             : 
      65           2 :     if( getFlag( nRkValue, BIFF_RK_100FLAG ) )
      66           0 :         aDecDbl.mfValue /= 100.0;
      67             : 
      68           2 :     return aDecDbl.mfValue;
      69             : }
      70             : 
      71           0 : /*static*/ double BiffHelper::calcDoubleFromError( sal_uInt8 nErrorCode )
      72             : {
      73           0 :     sal_uInt16 nApiError = 0x7FFF;
      74           0 :     switch( nErrorCode )
      75             :     {
      76           0 :         case BIFF_ERR_NULL:     nApiError = 521;    break;
      77           0 :         case BIFF_ERR_DIV0:     nApiError = 532;    break;
      78           0 :         case BIFF_ERR_VALUE:    nApiError = 519;    break;
      79           0 :         case BIFF_ERR_REF:      nApiError = 524;    break;
      80           0 :         case BIFF_ERR_NAME:     nApiError = 525;    break;
      81           0 :         case BIFF_ERR_NUM:      nApiError = 503;    break;
      82           0 :         case BIFF_ERR_NA:       nApiError = 0x7FFF; break;
      83             :         default:    OSL_FAIL( "BiffHelper::calcDoubleFromError - unknown error code" );
      84             :     }
      85           0 :     DecodedDouble aDecDbl;
      86           0 :     ::rtl::math::setNan( &aDecDbl.mfValue );
      87           0 :     aDecDbl.maStruct.nan_parts.fraction_lo = nApiError;
      88           0 :     return aDecDbl.mfValue;
      89             : }
      90             : 
      91             : // BIFF12 import --------------------------------------------------------------
      92             : 
      93          34 : /*static*/ OUString BiffHelper::readString( SequenceInputStream& rStrm, bool b32BitLen, bool bAllowNulChars )
      94             : {
      95          34 :     OUString aString;
      96          34 :     if( !rStrm.isEof() )
      97             :     {
      98          34 :         sal_Int32 nCharCount = b32BitLen ? rStrm.readValue< sal_Int32 >() : rStrm.readValue< sal_Int16 >();
      99             :         // string length -1 is often used to indicate a missing string
     100             :         OSL_ENSURE( !rStrm.isEof() && (nCharCount >= -1), "BiffHelper::readString - invalid string length" );
     101          34 :         if( !rStrm.isEof() && (nCharCount > 0) )
     102             :         {
     103             :             // SequenceInputStream always supports getRemaining()
     104          19 :             nCharCount = ::std::min( nCharCount, static_cast< sal_Int32 >( rStrm.getRemaining() / 2 ) );
     105          19 :             aString = rStrm.readUnicodeArray( nCharCount, bAllowNulChars );
     106             :         }
     107             :     }
     108          34 :     return aString;
     109             : }
     110             : 
     111             : // BIFF2-BIFF8 import ---------------------------------------------------------
     112             : 
     113           0 : /*static*/ bool BiffHelper::isBofRecord( BiffInputStream& rStrm )
     114             : {
     115             :     return
     116           0 :         (rStrm.getRecId() == BIFF2_ID_BOF) ||
     117           0 :         (rStrm.getRecId() == BIFF3_ID_BOF) ||
     118           0 :         (rStrm.getRecId() == BIFF4_ID_BOF) ||
     119           0 :         (rStrm.getRecId() == BIFF5_ID_BOF);
     120             : }
     121             : 
     122           0 : /*static*/ bool BiffHelper::skipRecordBlock( BiffInputStream& rStrm, sal_uInt16 nEndRecId )
     123             : {
     124           0 :     sal_uInt16 nStartRecId = rStrm.getRecId();
     125           0 :     while( rStrm.startNextRecord() && (rStrm.getRecId() != nEndRecId) )
     126           0 :         if( rStrm.getRecId() == nStartRecId )
     127           0 :             skipRecordBlock( rStrm, nEndRecId );
     128           0 :     return !rStrm.isEof() && (rStrm.getRecId() == nEndRecId);
     129             : }
     130             : 
     131             : } // namespace xls
     132          30 : } // namespace oox
     133             : 
     134             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */