Version 6.4.0.3, tag libreoffice-6.4.0.3
[LibreOffice.git] / sc / source / filter / oox / biffhelper.cxx
blobce48e93d8c70c76b8a208a1ae1b313a702274847
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /*
3 * This file is part of the LibreOffice project.
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/.
9 * This file incorporates work covered by the following license notice:
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 .
20 #include <biffhelper.hxx>
22 #include <rtl/math.hxx>
23 #include <osl/diagnose.h>
24 #include <oox/helper/binaryinputstream.hxx>
26 namespace oox {
27 namespace xls {
29 namespace {
31 const sal_Int32 BIFF_RK_100FLAG = 0x00000001;
32 const sal_Int32 BIFF_RK_INTFLAG = 0x00000002;
33 const sal_Int32 BIFF_RK_VALUEMASK = 0xFFFFFFFC;
35 union DecodedDouble
37 double mfValue;
38 sal_math_Double maStruct;
40 explicit DecodedDouble() {}
41 explicit DecodedDouble( double fValue ) : mfValue( fValue ) {}
44 } // namespace
46 // conversion -----------------------------------------------------------------
48 /*static*/ double BiffHelper::calcDoubleFromRk( sal_Int32 nRkValue )
50 DecodedDouble aDecDbl( 0.0 );
51 if( getFlag( nRkValue, BIFF_RK_INTFLAG ) )
53 sal_Int32 nTemp = nRkValue >> 2;
54 setFlag< sal_Int32 >( nTemp, 0xE0000000, nRkValue < 0 );
55 aDecDbl.mfValue = nTemp;
57 else
59 aDecDbl.maStruct.w32_parts.msw = static_cast< sal_uInt32 >( nRkValue & BIFF_RK_VALUEMASK );
62 if( getFlag( nRkValue, BIFF_RK_100FLAG ) )
63 aDecDbl.mfValue /= 100.0;
65 return aDecDbl.mfValue;
68 /*static*/ double BiffHelper::calcDoubleFromError( sal_uInt8 nErrorCode )
70 sal_uInt16 nApiError = 0x7FFF;
71 switch( nErrorCode )
73 case BIFF_ERR_NULL: nApiError = 521; break;
74 case BIFF_ERR_DIV0: nApiError = 532; break;
75 case BIFF_ERR_VALUE: nApiError = 519; break;
76 case BIFF_ERR_REF: nApiError = 524; break;
77 case BIFF_ERR_NAME: nApiError = 525; break;
78 case BIFF_ERR_NUM: nApiError = 503; break;
79 case BIFF_ERR_NA: nApiError = 0x7FFF; break;
80 default: OSL_FAIL( "BiffHelper::calcDoubleFromError - unknown error code" );
82 DecodedDouble aDecDbl;
83 ::rtl::math::setNan( &aDecDbl.mfValue );
84 aDecDbl.maStruct.nan_parts.fraction_lo = nApiError;
85 return aDecDbl.mfValue;
88 // BIFF12 import --------------------------------------------------------------
90 /*static*/ OUString BiffHelper::readString( SequenceInputStream& rStrm, bool b32BitLen )
92 OUString aString;
93 if( !rStrm.isEof() )
95 sal_Int32 nCharCount = b32BitLen ? rStrm.readValue< sal_Int32 >() : rStrm.readValue< sal_Int16 >();
96 // string length -1 is often used to indicate a missing string
97 OSL_ENSURE( !rStrm.isEof() && (nCharCount >= -1), "BiffHelper::readString - invalid string length" );
98 if( !rStrm.isEof() && (nCharCount > 0) )
100 // SequenceInputStream always supports getRemaining()
101 nCharCount = ::std::min( nCharCount, static_cast< sal_Int32 >( rStrm.getRemaining() / 2 ) );
102 aString = rStrm.readUnicodeArray( nCharCount );
105 return aString;
108 } // namespace xls
109 } // namespace oox
111 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */