sc/source/filter/oox/biffhelper.cxx

   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 <osl/diagnose.h>
  24 #include <oox/helper/binaryinputstream.hxx>
  25
  26 namespace oox::xls {
  27
  28 namespace {
  29
  30 const sal_Int32 BIFF_RK_100FLAG             = 0x00000001;
  31 const sal_Int32 BIFF_RK_INTFLAG             = 0x00000002;
  32 const sal_Int32 BIFF_RK_VALUEMASK           = 0xFFFFFFFC;
  33
  34 } // namespace
  35
  36 // conversion -----------------------------------------------------------------
  37
  38 /*static*/ double BiffHelper::calcDoubleFromRk( sal_Int32 nRkValue )
  39 {
  40     sal_math_Double  aMathDouble{};
  41     if( getFlag( nRkValue, BIFF_RK_INTFLAG ) )
  42     {
  43         sal_Int32 nTemp = nRkValue >> 2;
  44         setFlag< sal_Int32 >( nTemp, 0xE0000000, nRkValue < 0 );
  45         aMathDouble.value = nTemp;
  46     }
  47     else
  48     {
  49         aMathDouble.w32_parts.msw = static_cast< sal_uInt32 >( nRkValue & BIFF_RK_VALUEMASK );
  50     }
  51     if( getFlag( nRkValue, BIFF_RK_100FLAG ) )
  52         aMathDouble.value /= 100.0;
  53
  54     return aMathDouble.value;
  55 }
  56 /*static*/ double BiffHelper::calcDoubleFromError( sal_uInt8 nErrorCode )
  57 {
  58     sal_uInt16 nApiError = 0x7FFF;
  59     switch( nErrorCode )
  60     {
  61         case BIFF_ERR_NULL:     nApiError = 521;    break;
  62         case BIFF_ERR_DIV0:     nApiError = 532;    break;
  63         case BIFF_ERR_VALUE:    nApiError = 519;    break;
  64         case BIFF_ERR_REF:      nApiError = 524;    break;
  65         case BIFF_ERR_NAME:     nApiError = 525;    break;
  66         case BIFF_ERR_NUM:      nApiError = 503;    break;
  67         case BIFF_ERR_NA:       nApiError = 0x7FFF; break;
  68         default:    OSL_FAIL( "BiffHelper::calcDoubleFromError - unknown error code" );
  69     }
  70     sal_math_Double  aMathDouble;
  71     ::rtl::math::setNan( &aMathDouble.value );
  72     aMathDouble.nan_parts.fraction_lo = nApiError;
  73     return  aMathDouble.value;
  74 }
  75
  76 // BIFF12 import --------------------------------------------------------------
  77
  78 /*static*/ OUString BiffHelper::readString( SequenceInputStream& rStrm, bool b32BitLen )
  79 {
  80     OUString aString;
  81     if( !rStrm.isEof() )
  82     {
  83         sal_Int32 nCharCount = b32BitLen ? rStrm.readValue< sal_Int32 >() : rStrm.readValue< sal_Int16 >();
  84         // string length -1 is often used to indicate a missing string
  85         OSL_ENSURE( !rStrm.isEof() && (nCharCount >= -1), "BiffHelper::readString - invalid string length" );
  86         if( !rStrm.isEof() && (nCharCount > 0) )
  87         {
  88             // SequenceInputStream always supports getRemaining()
  89             nCharCount = ::std::min( nCharCount, static_cast< sal_Int32 >( rStrm.getRemaining() / 2 ) );
  90             aString = rStrm.readUnicodeArray( nCharCount );
  91         }
  92     }
  93     return aString;
  94 }
  95
  96 } // namespace oox::xls
  97
  98 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */