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1 /* |
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2 * Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 |
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18 |
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19 #include <e32std.h> |
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20 #include "FLDSTD.H" |
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21 |
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22 #include "FLDNUMS.H" |
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23 |
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24 LOCAL_D const TInt sDeneryArray[13] = { 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 }; |
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25 LOCAL_D const TText* const LsRomanArray[13] = { _S("M"), _S("CM"), _S("D"), _S("CD"),_S("C"), _S("XC"),_S("L"),_S("XL"),_S("X"),_S("IX"),_S("V"),_S("IV"),_S("I") }; |
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26 |
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27 ////////////////////////////// |
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28 // TDeneryToCharBase |
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29 ////////////////////////////// |
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30 |
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31 EXPORT_C TInt TDeneryToCharBase::DeneryToChar(TPtr& aValueText,TInt aDenary)const |
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32 // if aValueText is big enough to hold the result then the Roman Numeral representation of aDenery is inserted |
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33 // else the required size of aValueText is returned |
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34 // |
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35 { |
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36 aValueText.SetLength(0); |
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37 TInt numChars = NumChars(aDenary); |
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38 if (aValueText.MaxLength() < numChars) |
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39 return numChars; |
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40 else |
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41 { |
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42 DoDeneryToChar(aValueText,aDenary); |
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43 return KErrNone; |
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44 } |
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45 } |
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46 |
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47 |
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48 ////////////////////////////// |
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49 // TRomanNumeral |
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50 ////////////////////////////// |
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51 |
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52 EXPORT_C TInt TRomanNumeral::NumChars(TInt aDenery)const |
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53 // returns the number of characters in a given "roman number" |
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54 // |
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55 { |
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56 TInt numChars=0; |
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57 TInt i=0; |
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58 |
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59 while (aDenery > 0) |
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60 { |
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61 if (sDeneryArray[i] <= aDenery) |
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62 { |
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63 numChars += _L(sRomanArray[i]).Length(); |
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64 aDenery -= sDeneryArray[i]; |
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65 } |
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66 else |
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67 i++; |
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68 } |
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69 |
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70 return numChars; |
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71 } |
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72 |
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73 |
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74 EXPORT_C void TRomanNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const |
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75 // sets aValueText to the Roman Numeral representation of aDenery |
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76 // |
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77 { |
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78 aValueText.SetLength(0); |
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79 TInt i=0; |
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80 |
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81 while (aDenery > 0) |
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82 { |
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83 if (sDeneryArray[i] <= aDenery) |
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84 { |
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85 aValueText.Append(_L(sRomanArray[i])); |
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86 aDenery -= sDeneryArray[i]; |
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87 } |
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88 else |
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89 i++; |
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90 } |
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91 } |
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92 |
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93 |
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94 ///////////////////////// |
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95 // TArabicNumeral |
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96 ///////////////////////// |
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97 |
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98 EXPORT_C TInt TArabicNumeral::NumChars(TInt aNum)const |
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99 // returns num digits in an integer (including sign bit if negative) |
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100 // |
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101 { |
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102 TInt chars=1; |
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103 if (aNum<0) |
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104 { |
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105 chars++; |
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106 aNum = aNum*(-1); |
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107 } |
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108 while (aNum>=10) |
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109 { |
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110 aNum = aNum/10; |
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111 chars++; |
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112 } |
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113 return chars; |
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114 } |
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115 |
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116 |
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117 EXPORT_C void TArabicNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const |
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118 { |
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119 aValueText.Num(aDenery); |
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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 // TAlphabeticNumeral |
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125 ///////////////////////// |
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126 |
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127 EXPORT_C TInt TAlphabeticNumeral::NumChars(TInt aNum)const |
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128 // returns num digits in an integer (including sign bit if negative) |
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129 // |
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130 { |
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131 TInt chars=1; |
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132 if (aNum<0) |
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133 { |
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134 chars++; |
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135 aNum = aNum*(-1); |
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136 } |
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137 while (aNum>26) |
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138 { |
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139 aNum = aNum/26; |
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140 chars++; |
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141 } |
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142 return chars; |
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143 } |
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144 |
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145 |
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146 EXPORT_C void TAlphabeticNumeral::DoDeneryToChar(TPtr& aValueText,TInt aDenery)const |
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147 { |
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148 TInt digit=0; |
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149 while (aDenery>0) |
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150 { |
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151 digit = aDenery%26; // remainder gives least significant figure |
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152 PropendDigitAsChar(aValueText,digit); |
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153 aDenery -= digit; |
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154 aDenery = aDenery/26; |
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155 } |
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156 } |
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157 |
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158 |
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159 void TAlphabeticNumeral::PropendDigitAsChar(TPtr& aValueText,TInt aDigit)const |
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160 { |
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161 __ASSERT_ALWAYS(aDigit>0,Panic(ECharOutOfRange)); |
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162 __ASSERT_ALWAYS(aDigit<27,Panic(ECharOutOfRange)); |
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163 __ASSERT_ALWAYS(aValueText.Length()<aValueText.MaxLength(),Panic(EBufferFull)); |
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164 |
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165 TBuf<1> buf; |
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166 buf.Append(TChar(aDigit+64)); |
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167 aValueText.Insert(0,buf); // insert at position zero, ie propend |
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168 } |
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169 |
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170 |