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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: */
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