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1 // Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // Implementation of the TCalendar class. |
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15 // |
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16 |
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17 #include <e32def.h> |
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18 #include <e32math.h> |
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19 #include "calendar.h" |
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20 |
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21 // Constants |
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22 const TReal KRemainderApproxZero = 0.000000001; |
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23 |
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24 ////////////////////////////////////////////////////////////////////// |
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25 // Construction/Destruction |
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26 ////////////////////////////////////////////////////////////////////// |
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27 |
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28 //------------------------------------------------------ |
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29 // Class: TCalendar |
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30 // Function: TCalendar |
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31 // Arguments: None |
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32 // |
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33 // Comments: Constructor |
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34 // |
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35 // Return: none |
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36 //------------------------------------------------------ |
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37 TCalendar::TCalendar() |
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38 { |
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39 iJulianDay = 0; |
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40 } |
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41 |
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42 |
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43 //------------------------------------------------------ |
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44 // Class: TCalendar |
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45 // Function: operator = |
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46 // Arguments: TCalendar &TCal - the TCalendar |
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47 // class by referance. |
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48 // |
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49 // Comments: Copies the JulianDay value from one instance |
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50 // of TCalendar to an other. |
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51 // |
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52 // Return: *this |
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53 //------------------------------------------------------ |
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54 TCalendar& TCalendar::operator =(const TCalendar &TCal) |
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55 { |
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56 iJulianDay = TCal.iJulianDay; |
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57 return (*this); |
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58 } |
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59 |
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60 //------------------------------------------------------ |
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61 // Class: TCalendar |
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62 // Function: Floor |
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63 // Arguments: TReal& ,TReal& |
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64 // |
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65 // Comments: This function returns the floor value of the |
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66 // value given in the aNum argument as Determined by: |
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67 // |
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68 // the largest integer less than or equal to aNum |
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69 // |
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70 // Return: None |
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71 //------------------------------------------------------ |
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72 void TCalendar::Floor(TInt& aRes,const TReal& aNum) const |
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73 { |
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74 TReal tempReal; |
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75 TInt32 tempReal32; |
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76 TInt precision = 0; |
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77 |
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78 TReal wholeNoTemp; |
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79 Math::Frac(wholeNoTemp,aNum); |
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80 if(wholeNoTemp < 0) |
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81 { |
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82 wholeNoTemp = -wholeNoTemp; |
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83 } |
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84 |
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85 if((aNum == 0) || (wholeNoTemp < KRemainderApproxZero)) |
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86 { |
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87 tempReal = aNum; |
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88 } |
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89 else |
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90 { |
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91 tempReal = aNum - KCalConvPointFive; |
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92 } |
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93 Math::Round(tempReal,tempReal,precision); |
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94 Math::Int(tempReal32,tempReal); |
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95 aRes = tempReal32; |
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96 } |
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97 |
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98 //------------------------------------------------------ |
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99 // Class: TCalendar |
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100 // Function: Ceiling |
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101 // Arguments: TReal& ,TReal& |
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102 // |
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103 // Comments: This function returns the ceiling value of the |
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104 // value given in the aNum argument as Determined by: |
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105 // |
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106 // the smallest integer less than or equal to aNum |
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107 // |
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108 // Return: None |
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109 //------------------------------------------------------ |
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110 void TCalendar::Ceiling(TInt& aRes,const TReal& aNum) const |
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111 { |
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112 TReal tempReal; |
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113 TInt32 tempReal32; |
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114 TInt precision = 0; |
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115 |
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116 TReal wholeNoTemp; |
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117 Math::Frac(wholeNoTemp,aNum); |
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118 if(wholeNoTemp < 0) |
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119 { |
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120 wholeNoTemp = -wholeNoTemp; |
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121 } |
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122 |
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123 if((aNum == 0) || (wholeNoTemp < KRemainderApproxZero)) |
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124 { |
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125 tempReal = aNum; |
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126 } |
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127 else |
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128 { |
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129 tempReal = aNum + KCalConvPointFive; |
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130 } |
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131 Math::Round(tempReal,tempReal,precision); |
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132 Math::Int(tempReal32,tempReal); |
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133 aRes = tempReal32; |
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134 } |
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135 |
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136 //------------------------------------------------------ |
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137 // Class: TCalendar |
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138 // Function: Mod |
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139 // Arguments: TReal &, const TReal &, const TReal & |
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140 // |
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141 // Comments: return the mod of the aAbscissa / aDenominator |
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142 // quotient as Determined by: |
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143 // |
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144 // aAbscissa - aDenominator(floor(aAbscissa / aDenominator)) |
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145 // |
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146 // Return: None |
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147 //------------------------------------------------------ |
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148 void TCalendar::Mod(TReal &aRes, const TReal &aAbscissa, const TReal &aDenominator) const |
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149 { |
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150 TReal quo; |
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151 TInt tempInt; |
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152 |
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153 quo = aAbscissa / aDenominator; |
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154 |
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155 Floor(tempInt,quo); |
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156 |
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157 aRes = aAbscissa - (aDenominator * tempInt); |
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158 } |
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159 |
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160 //------------------------------------------------------ |
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161 // Class: TCalendar |
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162 // Function: Amod |
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163 // Arguments: TReal &, const TReal &, const TReal & |
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164 // |
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165 // Comments: Determines the adjusted remainder |
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166 // |
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167 // Return: None |
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168 //------------------------------------------------------ |
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169 void TCalendar::Amod(TReal &aRes, const TReal &aAbscissa, const TReal &aDenominator) const |
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170 { |
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171 Mod(aRes,aAbscissa,aDenominator); |
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172 |
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173 if(aRes == 0) |
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174 { |
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175 aRes = aDenominator; |
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176 } |
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177 } |
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178 |
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179 //------------------------------------------------------ |
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180 // Class: TCalendar |
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181 // Function: Round |
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182 // Arguments: TInt &, TReal & |
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183 // |
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184 // Comments: rounds of the aNum argument |
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185 // |
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186 // Return: None |
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187 //------------------------------------------------------ |
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188 void TCalendar::Round(TInt &aRes, TReal &aNum) const |
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189 { |
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190 TReal temp; |
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191 temp = aNum + 0.5; |
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192 Floor(aRes,temp); |
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193 } |
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194 |
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195 //------------------------------------------------------ |
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196 // Class: TCalendar |
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197 // Function: JulianDay |
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198 // Arguments: None |
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199 // |
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200 // Comments: Returns the Julian day as a TInt |
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201 // |
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202 // Return: TInt |
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203 //------------------------------------------------------ |
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204 TInt TCalendar::JulianDay() |
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205 { |
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206 return (TInt)iJulianDay; |
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207 } |