author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 10:12:19 +0200 | |
changeset 0 | f979ecb2b13e |
child 29 | 12af337248b1 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Provides Solar Term dates for Lunar Calendar. Reads and caches |
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* binary data file that lists solar term dates. |
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* |
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*/ |
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//debug |
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#include "calendarui_debug.h" |
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#include "calensolarterms.h" |
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#include "calenlunarpaths.h" |
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#include <f32file.h> |
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#include <s32file.h> |
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// CONSTANTS |
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_LIT(KSolarTermsFile, "SolarItems"); |
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// search path for solar item file |
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//Uncomment for emulator |
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_LIT( KSolarTermsPath, "//private//10005901//" ); |
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//_LIT( KSolarTermsPath, "//Data//calenlunarchinese//" ); |
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const TInt KFirstSolarTermYear(1900); |
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const TInt KLastSolarTermYear(2100); |
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// ======== MEMBER FUNCTIONS ======== |
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// --------------------------------------------------------------------------- |
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// |
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// --------------------------------------------------------------------------- |
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// |
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CCalenSolarTerms* CCalenSolarTerms::NewL(RFs& aFs) |
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{ |
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TRACE_ENTRY_POINT; |
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CCalenSolarTerms* self = new (ELeave) CCalenSolarTerms(aFs); |
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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CleanupStack::Pop( self ); |
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TRACE_EXIT_POINT; |
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return self; |
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} |
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// --------------------------------------------------------------------------- |
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// |
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// --------------------------------------------------------------------------- |
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// |
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CCalenSolarTerms::~CCalenSolarTerms() |
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{ |
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TRACE_ENTRY_POINT; |
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TRACE_EXIT_POINT; |
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} |
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// --------------------------------------------------------------------------- |
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// |
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// --------------------------------------------------------------------------- |
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// |
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TInt CCalenSolarTerms::CheckSolarTermDateL( const TDateTime& aDate ) |
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{ |
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TRACE_ENTRY_POINT; |
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ReadSolarTermsL( aDate ); |
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if ( HasSolarTermDataAvailable( aDate ) ) |
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{ |
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// Solar festival data is available for this date |
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for (TInt i(0); i < KSolarTermCount; i++) |
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{ |
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TDateTime date = iSolarTermDates[i]; |
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if (aDate.Month() == date.Month() && aDate.Day() == date.Day()) |
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{ |
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// First item in iSolarTermNames is LiChun ("Spring begins") |
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// occuring around 4.2 in western year. |
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// It is first solar term in Chinese Lunar year, but it's |
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// third term in western year. |
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// |
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// iSolarTermDates list terms from beginning of western year, |
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// that's why we subtract 2 and take modulo 24 here, to convert |
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// order from |
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// Xiao Han (~ 6.1.), Da Han (~22.1), Li Chun (~4.2)... |
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// to |
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// Li Chun (~4.2.), ..., ..., Da Han (~22.1) |
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103 |
i += KSolarTermCount - 2; |
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104 |
TInt foundIndex = i % KSolarTermCount; |
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|
105 |
|
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106 |
TRACE_EXIT_POINT; |
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107 |
return foundIndex; |
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108 |
} |
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109 |
} |
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110 |
TRACE_EXIT_POINT; |
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111 |
return KErrNotFound; |
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112 |
} |
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113 |
else |
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114 |
{ |
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115 |
// Solar festival data is NOT available for this date |
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TRACE_EXIT_POINT; |
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return KErrNotSupported; |
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118 |
} |
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119 |
} |
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120 |
|
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121 |
|
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122 |
|
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123 |
// --------------------------------------------------------------------------- |
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124 |
// ?description_if_needed |
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125 |
// --------------------------------------------------------------------------- |
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126 |
// |
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127 |
CCalenSolarTerms::CCalenSolarTerms(RFs& aFs) : iFs( aFs ) |
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128 |
{ |
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129 |
TRACE_ENTRY_POINT; |
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130 |
TRACE_EXIT_POINT; |
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131 |
} |
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132 |
|
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133 |
|
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134 |
// --------------------------------------------------------------------------- |
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135 |
// ?description_if_needed |
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136 |
// --------------------------------------------------------------------------- |
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137 |
// |
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138 |
void CCalenSolarTerms::ConstructL() |
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139 |
{ |
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140 |
TRACE_ENTRY_POINT; |
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141 |
TRACE_EXIT_POINT; |
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142 |
} |
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143 |
|
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144 |
|
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145 |
// --------------------------------------------------------------------------- |
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146 |
// ?description_if_needed |
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147 |
// --------------------------------------------------------------------------- |
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148 |
// |
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149 |
TBool CCalenSolarTerms::HasSolarTermDataAvailable(const TDateTime& aDate) const |
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150 |
{ |
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151 |
TRACE_ENTRY_POINT; |
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152 |
|
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153 |
// Note: day parameter for TDateTime starts from 0, not from 1 |
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154 |
const TDateTime KMinAvailable( KFirstSolarTermYear, EJanuary, 0, 0, 0, 0, 0 ); |
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155 |
const TDateTime KMaxAvailable( KLastSolarTermYear, EDecember, 31 - 1, 23, 59, 59, 0 ); |
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156 |
|
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157 |
TRACE_EXIT_POINT; |
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158 |
return TTime(KMinAvailable) <= TTime(aDate) && |
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159 |
TTime(aDate) <= TTime(KMaxAvailable); |
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160 |
} |
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161 |
|
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|
162 |
|
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163 |
// --------------------------------------------------------- |
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164 |
// Reads and caches 24 solar term dates for one year |
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165 |
// from "SolarItems" file |
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166 |
// --------------------------------------------------------- |
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167 |
// |
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|
168 |
void CCalenSolarTerms::ReadSolarTermsL(TDateTime aDate) |
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169 |
{ |
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170 |
TRACE_ENTRY_POINT; |
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|
171 |
|
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172 |
// Caches one year of solar items |
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173 |
if ( ! HasSolarTermDataAvailable( aDate ) ) |
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174 |
{ |
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175 |
return; |
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176 |
} |
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|
177 |
|
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178 |
TInt year = aDate.Year(); |
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|
179 |
|
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180 |
if (iCachedYear != year) |
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181 |
{ |
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182 |
RFile file; |
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183 |
RFs& fs = iFs; |
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184 |
TFindFile ffile(fs); |
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185 |
User::LeaveIfError(ffile.FindByDir(KSolarTermsFile, KSolarTermsPath)); |
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186 |
User::LeaveIfError(file.Open(fs, |
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|
187 |
ffile.File(), EFileRead)); |
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|
188 |
CleanupClosePushL(file); |
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|
189 |
|
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|
190 |
TInt seekPos = |
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191 |
(year - KFirstSolarTermYear) * sizeof(TUint8) * KSolarTermCount; |
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|
192 |
|
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|
193 |
RFileReadStream readStream( file, seekPos ); |
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194 |
readStream.PushL(); |
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|
195 |
|
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196 |
for (TInt i(0); i < KSolarTermCount; i++) |
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197 |
{ |
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|
198 |
TMonth month = static_cast<TMonth>( EJanuary + (i / 2) ); |
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199 |
TInt day = readStream.ReadUint8L(); |
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200 |
TDateTime dt(year, month, day-1, 0, 0, 0, 0); |
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|
201 |
iSolarTermDates[i] = dt; |
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202 |
} |
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|
203 |
|
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204 |
CleanupStack::PopAndDestroy(2); // readStream, file |
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205 |
iCachedYear = year; |
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206 |
} |
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|
207 |
|
f979ecb2b13e
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
208 |
TRACE_EXIT_POINT; |
f979ecb2b13e
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
209 |
} |