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1 /* |
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2 * Copyright (c) 2005 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: TMMCScBkupDriveFilter implementation |
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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 "TMMCScBkupDriveFilter.h" |
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20 |
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21 // Constants |
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22 const TInt KMMCScBkupInitialDriveIndex = -1; |
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23 |
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24 |
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25 |
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26 // ========================= MEMBER FUNCTIONS ================================ |
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27 |
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28 // --------------------------------------------------------------------------- |
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29 // TMMCScBkupDriveFilter::Reset() |
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30 // |
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31 // |
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32 // --------------------------------------------------------------------------- |
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33 void TMMCScBkupDriveFilter::Reset() |
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34 { |
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35 iCurrentDrive = KMMCScBkupInitialDriveIndex; |
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36 } |
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37 |
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38 |
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39 // --------------------------------------------------------------------------- |
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40 // TMMCScBkupDriveFilter::SetPrimaryDriveFilter() |
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41 // |
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42 // |
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43 // --------------------------------------------------------------------------- |
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44 void TMMCScBkupDriveFilter::SetPrimaryDriveFilter( const TDriveList& aDriveList ) |
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45 { |
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46 iPrimaryDriveList = aDriveList; |
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47 } |
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48 |
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49 |
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50 // --------------------------------------------------------------------------- |
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51 // TMMCScBkupDriveFilter::SetSecondaryDriveFilter() |
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52 // |
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53 // |
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54 // --------------------------------------------------------------------------- |
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55 void TMMCScBkupDriveFilter::SetSecondaryDriveFilter( const TDriveList& aDriveList ) |
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56 { |
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57 iSecondaryDriveList = aDriveList; |
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58 iHaveSecondaryList = ETrue; |
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59 } |
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60 |
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61 |
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62 // --------------------------------------------------------------------------- |
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63 // TMMCScBkupDriveFilter::NextValidDrive() |
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64 // |
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65 // |
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66 // --------------------------------------------------------------------------- |
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67 TBool TMMCScBkupDriveFilter::NextValidDrive( TDriveNumber& aDrive ) |
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68 { |
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69 // Always move to the next drive before checking its availability. |
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70 // FindValidDrive takes care of ensuring the value falls within A-Z |
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71 // range. |
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72 ++iCurrentDrive; |
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73 |
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74 // Do we have an available primary drive? |
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75 TBool driveAvailable = EFalse; |
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76 while( iCurrentDrive >= EDriveA && iCurrentDrive <= EDriveZ ) |
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77 { |
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78 TDriveNumber drive; |
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79 driveAvailable = FindValidDrive( iPrimaryDriveList, drive ); |
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80 if ( driveAvailable && iHaveSecondaryList ) |
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81 { |
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82 // Verify against secondary drive list also... |
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83 const TBool makeOnlyOneDirectAttempt = ETrue; |
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84 driveAvailable = FindValidDrive( iSecondaryDriveList, drive, makeOnlyOneDirectAttempt ); |
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85 } |
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86 else if (!driveAvailable) |
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87 { |
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88 // No more primary drives left, so we're done here. |
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89 break; |
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90 } |
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91 |
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92 // Did we find a match on (just) the primary drive, or then |
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93 // the primary and secondary drive lists combined? |
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94 if (driveAvailable) |
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95 { |
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96 // Yes, match found - we're finished here. |
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97 aDrive = drive; |
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98 break; |
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99 } |
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100 else |
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101 { |
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102 // Try to search for the next drive that matches both the |
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103 // primary and secondary lists (if supported) |
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104 ++iCurrentDrive; |
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105 } |
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106 } |
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107 // |
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108 return driveAvailable; |
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109 } |
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110 |
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111 |
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112 // --------------------------------------------------------------------------- |
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113 // TMMCScBkupDriveFilter::CurrentDrive() |
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114 // |
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115 // |
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116 // --------------------------------------------------------------------------- |
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117 TDriveNumber TMMCScBkupDriveFilter::CurrentDrive() const |
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118 { |
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119 return static_cast< TDriveNumber >( iCurrentDrive ); |
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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 // TMMCScBkupDriveFilter::FindValidDrive() |
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125 // |
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126 // |
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127 // --------------------------------------------------------------------------- |
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128 TBool TMMCScBkupDriveFilter::FindValidDrive( const TDriveList& aList, TDriveNumber& aDrive, TBool aOneAttemptOnly ) |
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129 { |
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130 // If we've already reached Z then there isn't any sense in continuing |
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131 // as all drives have been processed. |
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132 TBool driveAvailable = EFalse; |
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133 |
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134 // Keep checking drives until we go past Z |
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135 while( iCurrentDrive >= EDriveA && iCurrentDrive <= EDriveZ ) |
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136 { |
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137 if ( aList[ iCurrentDrive ] != 0 ) |
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138 { |
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139 // Found an available drive |
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140 aDrive = static_cast< TDriveNumber >( iCurrentDrive ); |
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141 driveAvailable = ETrue; |
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142 break; |
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143 } |
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144 else if ( aOneAttemptOnly ) |
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145 { |
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146 break; |
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147 } |
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148 |
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149 // Try next drive |
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150 ++iCurrentDrive; |
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151 } |
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152 // |
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153 return driveAvailable; |
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154 } |
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155 |
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156 |
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157 |
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158 |