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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 "biffinputstream.hxx"
25 : #include "worksheethelper.hxx"
26 : #include "oox/helper/binaryoutputstream.hxx"
27 :
28 : namespace oox {
29 : namespace xls {
30 :
31 :
32 :
33 :
34 : namespace {
35 :
36 : const sal_Int32 BIFF_RK_100FLAG = 0x00000001;
37 : const sal_Int32 BIFF_RK_INTFLAG = 0x00000002;
38 : const sal_Int32 BIFF_RK_VALUEMASK = 0xFFFFFFFC;
39 :
40 : union DecodedDouble
41 : {
42 : double mfValue;
43 : sal_math_Double maStruct;
44 :
45 0 : inline explicit DecodedDouble() {}
46 0 : inline explicit DecodedDouble( double fValue ) : mfValue( fValue ) {}
47 : };
48 :
49 : } // namespace
50 :
51 : // conversion -----------------------------------------------------------------
52 :
53 0 : /*static*/ double BiffHelper::calcDoubleFromRk( sal_Int32 nRkValue )
54 : {
55 0 : DecodedDouble aDecDbl( 0.0 );
56 0 : if( getFlag( nRkValue, BIFF_RK_INTFLAG ) )
57 : {
58 0 : sal_Int32 nTemp = nRkValue >> 2;
59 0 : setFlag< sal_Int32 >( nTemp, 0xE0000000, nRkValue < 0 );
60 0 : aDecDbl.mfValue = nTemp;
61 : }
62 : else
63 : {
64 0 : aDecDbl.maStruct.w32_parts.msw = static_cast< sal_uInt32 >( nRkValue & BIFF_RK_VALUEMASK );
65 : }
66 :
67 0 : if( getFlag( nRkValue, BIFF_RK_100FLAG ) )
68 0 : aDecDbl.mfValue /= 100.0;
69 :
70 0 : return aDecDbl.mfValue;
71 : }
72 :
73 0 : /*static*/ double BiffHelper::calcDoubleFromError( sal_uInt8 nErrorCode )
74 : {
75 0 : sal_uInt16 nApiError = 0x7FFF;
76 0 : switch( nErrorCode )
77 : {
78 0 : case BIFF_ERR_NULL: nApiError = 521; break;
79 0 : case BIFF_ERR_DIV0: nApiError = 532; break;
80 0 : case BIFF_ERR_VALUE: nApiError = 519; break;
81 0 : case BIFF_ERR_REF: nApiError = 524; break;
82 0 : case BIFF_ERR_NAME: nApiError = 525; break;
83 0 : case BIFF_ERR_NUM: nApiError = 503; break;
84 0 : case BIFF_ERR_NA: nApiError = 0x7FFF; break;
85 : default: OSL_FAIL( "BiffHelper::calcDoubleFromError - unknown error code" );
86 : }
87 0 : DecodedDouble aDecDbl;
88 0 : ::rtl::math::setNan( &aDecDbl.mfValue );
89 0 : aDecDbl.maStruct.nan_parts.fraction_lo = nApiError;
90 0 : return aDecDbl.mfValue;
91 : }
92 :
93 : // BIFF12 import --------------------------------------------------------------
94 :
95 0 : /*static*/ OUString BiffHelper::readString( SequenceInputStream& rStrm, bool b32BitLen, bool bAllowNulChars )
96 : {
97 0 : OUString aString;
98 0 : if( !rStrm.isEof() )
99 : {
100 0 : sal_Int32 nCharCount = b32BitLen ? rStrm.readValue< sal_Int32 >() : rStrm.readValue< sal_Int16 >();
101 : // string length -1 is often used to indicate a missing string
102 : OSL_ENSURE( !rStrm.isEof() && (nCharCount >= -1), "BiffHelper::readString - invalid string length" );
103 0 : if( !rStrm.isEof() && (nCharCount > 0) )
104 : {
105 : // SequenceInputStream always supports getRemaining()
106 0 : nCharCount = ::std::min( nCharCount, static_cast< sal_Int32 >( rStrm.getRemaining() / 2 ) );
107 0 : aString = rStrm.readUnicodeArray( nCharCount, bAllowNulChars );
108 : }
109 : }
110 0 : return aString;
111 : }
112 :
113 : // BIFF2-BIFF8 import ---------------------------------------------------------
114 :
115 0 : /*static*/ bool BiffHelper::isBofRecord( BiffInputStream& rStrm )
116 : {
117 : return
118 0 : (rStrm.getRecId() == BIFF2_ID_BOF) ||
119 0 : (rStrm.getRecId() == BIFF3_ID_BOF) ||
120 0 : (rStrm.getRecId() == BIFF4_ID_BOF) ||
121 0 : (rStrm.getRecId() == BIFF5_ID_BOF);
122 : }
123 :
124 0 : /*static*/ bool BiffHelper::skipRecordBlock( BiffInputStream& rStrm, sal_uInt16 nEndRecId )
125 : {
126 0 : sal_uInt16 nStartRecId = rStrm.getRecId();
127 0 : while( rStrm.startNextRecord() && (rStrm.getRecId() != nEndRecId) )
128 0 : if( rStrm.getRecId() == nStartRecId )
129 0 : skipRecordBlock( rStrm, nEndRecId );
130 0 : return !rStrm.isEof() && (rStrm.getRecId() == nEndRecId);
131 : }
132 :
133 : } // namespace xls
134 18 : } // namespace oox
135 :
136 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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