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1 // Copyright (c) 1996-2009 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 the License "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 // f32\sfat32\inc\sl_std.inl |
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15 // |
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16 // |
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17 |
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18 #ifndef SL_STD_INL |
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19 #define SL_STD_INL |
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20 |
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21 |
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22 |
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23 TBool IsPowerOf2(TUint32 aVal) |
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24 { |
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25 if (aVal==0) |
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26 return EFalse; |
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27 |
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28 return !(aVal & (aVal-1)); |
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29 } |
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30 |
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31 TUint32 Pow2(TUint32 aVal) |
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32 { |
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33 //ASSERT(aVal<32); |
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34 return 1 << aVal; |
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35 } |
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36 |
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37 |
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38 //--------------------------------------------------------------------------------------------------------------------------------- |
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39 // class TEntryPos |
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40 TUint32 TEntryPos::Cluster() const |
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41 { |
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42 return (TUint32) iCluster; |
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43 } |
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44 |
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45 TUint32 TEntryPos::Pos() const |
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46 { |
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47 return (TUint32) iPos; |
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48 } |
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49 |
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50 TBool TEntryPos::operator==(const TEntryPos& aRhs) const |
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51 { |
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52 ASSERT(this != &aRhs); |
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53 return (iCluster == aRhs.iCluster && iPos == aRhs.iPos); |
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54 } |
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55 |
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56 |
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57 //--------------------------------------------------------------------------------------------------------------------------------- |
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58 // class CFatMountCB |
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59 |
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60 inline TInt CFatMountCB::RootDirectorySector() const |
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61 {return iVolParam.RootDirectorySector();} |
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62 |
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63 inline TUint CFatMountCB::RootDirEnd() const |
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64 {return iVolParam.RootDirEnd();} |
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65 |
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66 inline TUint32 CFatMountCB::RootClusterNum() const |
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67 {return iVolParam.RootClusterNum(); } |
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68 |
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69 |
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70 inline TInt CFatMountCB::StartCluster(const TFatDirEntry & anEntry) const |
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71 { |
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72 if(Is32BitFat()) |
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73 return anEntry.StartCluster(); |
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74 else |
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75 return 0xFFFF&anEntry.StartCluster(); |
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76 } |
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77 |
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78 /** |
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79 returns true for root dir on Fat12/16 (fixed root dir versions of Fat) false on fat32 |
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80 this function is used to handle special cases for reading/writing the root directory on FAT via the use of cluster zero. |
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81 |
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82 @param aEntry position on volume being queried |
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83 @return Whether Root dir position or not |
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84 */ |
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85 TBool CFatMountCB::IsRootDir(const TEntryPos &aEntry) const |
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86 { |
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87 if(Is32BitFat()) |
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88 return EFalse; |
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89 else |
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90 return((aEntry.iCluster==0) ? (TBool)ETrue : (TBool)EFalse); |
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91 } |
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92 /** |
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93 Indicates the root directory cluster, For Fat12/16 root is always indicated by cluster number zero, on Fat32 the is a root cluster number |
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94 @return The root cluster indicator |
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95 */ |
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96 TInt CFatMountCB::RootIndicator() const |
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97 { |
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98 if(Is32BitFat()) |
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99 return iVolParam.RootClusterNum(); |
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100 else |
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101 return 0; |
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102 } |
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103 |
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104 |
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105 /** @return Log2 of cluster size on volume */ |
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106 TInt CFatMountCB::ClusterSizeLog2() const |
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107 {return(iVolParam.ClusterSizeLog2());} |
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108 |
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109 /** @return Log2 of media sector size */ |
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110 TInt CFatMountCB::SectorSizeLog2() const |
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111 {return(iVolParam.SectorSizeLog2());} |
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112 |
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113 /** @return sector per cluster */ |
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114 TInt CFatMountCB::SectorsPerCluster() const |
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115 {return(1<<(iVolParam.ClusterSizeLog2()-iVolParam.SectorSizeLog2()));} |
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116 |
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117 /** @return the base position of a cluster */ |
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118 TInt CFatMountCB::ClusterBasePosition() const |
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119 {return(iFirstFreeByte);} |
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120 |
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121 /** @return the offset into a cluster of a byte address */ |
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122 TInt CFatMountCB::ClusterRelativePos(TInt aPos) const |
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123 {return(aPos&((1<<ClusterSizeLog2())-1));} |
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124 |
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125 /** |
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126 Calculates the maximum number of clusters |
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127 @return maximum number of clusters |
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128 */ |
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129 TUint32 CFatMountCB::MaxClusterNumber() const |
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130 {return(TotalSectors()>>(ClusterSizeLog2()-SectorSizeLog2()));} |
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131 |
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132 /** @return the the total sectors on volume */ |
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133 TInt CFatMountCB::TotalSectors() const |
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134 {return iVolParam.TotalSectors();} |
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135 |
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136 /** @return total size of a Fat in bytes */ |
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137 TInt CFatMountCB::FatSizeInBytes() const |
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138 {return iVolParam.FatSizeInBytes();} |
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139 |
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140 /** @return first sector of the Fat */ |
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141 TUint32 CFatMountCB::FirstFatSector() const |
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142 {return iVolParam.FirstFatSector();} |
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143 |
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144 /** @return the byte offset of the Fat */ |
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145 TInt CFatMountCB::StartOfFatInBytes() const |
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146 {return(FirstFatSector()<<SectorSizeLog2());} |
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147 |
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148 /** @return Number of Fats used by the volume */ |
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149 TInt CFatMountCB::NumberOfFats() const |
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150 {return iVolParam.NumberOfFats();} |
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151 |
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152 |
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153 /** @return refrence to the fat table owned by the mount */ |
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154 CFatTable& CFatMountCB::FAT() const |
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155 {return(*iFatTable);} |
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156 /** |
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157 @return refrence to the file system object that has produced this CFatMountCB |
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158 */ |
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159 CFatFileSystem& CFatMountCB::FatFileSystem() const |
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160 { |
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161 return (CFatFileSystem&)(*FileSystem()); //-- CMountCB::FileSystem() provides correct answer |
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162 } |
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163 |
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164 |
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165 /** @return refrence to a raw disk object owned by the mount */ |
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166 CRawDisk& CFatMountCB::RawDisk() const |
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167 {return(*iRawDisk);} |
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168 |
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169 /** |
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170 @return ETrue if aCluster value is bad cluster marker defined in FAT specification |
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171 */ |
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172 TBool CFatMountCB::IsBadCluster(TInt aCluster) const |
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173 {return Is32BitFat() ? aCluster==0xFFFFFF7 : Is16BitFat() ? aCluster==0xFFF7 : aCluster==0xFF7;} |
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174 |
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175 /** |
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176 Returns whether the current mount is running as rugged Fat or not, this is held in the file system object |
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177 @return Is rugged fat flag |
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178 */ |
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179 TBool CFatMountCB::IsRuggedFSys() const |
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180 {return Drive().IsRugged();} |
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181 |
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182 /** |
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183 Sets the rugged flag in the file system object |
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184 @param Flag to set or clear the rugged flag |
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185 */ |
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186 void CFatMountCB::SetRuggedFSys(TBool aVal) |
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187 {Drive().SetRugged(aVal);} |
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188 |
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189 /** @return the usable clusters count for a volume */ |
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190 TUint32 CFatMountCB::UsableClusters() const |
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191 {return(iUsableClusters);} |
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192 |
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193 |
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194 TUint CFatMountCB::StartOfRootDirInBytes() const |
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195 {return iVolParam.RootDirectorySector()<<SectorSizeLog2();} |
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196 |
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197 |
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198 /** @return FAT type for this mount */ |
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199 TFatType CFatMountCB::FatType() const |
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200 { |
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201 return iFatType; |
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202 } |
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203 |
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204 /** @return ETrue if the mount has 16bit FAT */ |
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205 TBool CFatMountCB::Is16BitFat() const |
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206 { |
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207 return FatType() == EFat16; |
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208 } |
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209 |
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210 /** @return ETrue if the mount has 32bit FAT */ |
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211 TBool CFatMountCB::Is32BitFat() const |
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212 { |
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213 return FatType() == EFat32; |
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214 } |
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215 |
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216 CAsyncNotifier* CFatMountCB::Notifier() const |
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217 {return iNotifier;} |
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218 |
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219 |
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220 |
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221 /** |
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222 Set or reset Read Only mode for the mount. |
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223 @param aReadOnlyMode if ETrue, the mount will be set RO. |
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224 */ |
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225 void CFatMountCB::SetReadOnly(TBool aReadOnlyMode) |
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226 { |
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227 iReadOnly = aReadOnlyMode; |
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228 } |
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229 |
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230 |
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231 /** |
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232 @return ETrue if the volume is in Read-Only state |
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233 */ |
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234 TBool CFatMountCB::ReadOnly(void) const |
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235 { |
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236 return iReadOnly; |
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237 } |
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238 |
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239 /** @return state of the CFatMountCB*/ |
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240 CFatMountCB::TFatMntState CFatMountCB::State() const |
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241 { |
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242 return iState; |
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243 } |
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244 |
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245 /** |
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246 Set state of the CFatMountCB |
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247 @param aState state to set |
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248 */ |
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249 void CFatMountCB::SetState(TFatMntState aState) |
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250 { |
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251 __PRINT3(_L("#- CFatMountCB::SetState() drv:%d, %d->%d\n"),DriveNumber(),iState,aState); |
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252 iState = aState; |
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253 } |
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254 |
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255 |
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256 TFatDriveInterface& CFatMountCB::DriveInterface() const |
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257 { |
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258 return (TFatDriveInterface&)iDriverInterface; |
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259 } |
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260 |
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261 const TFatConfig& CFatMountCB::FatConfig() const |
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262 { |
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263 return iFatConfig; |
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264 } |
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265 |
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266 //--------------------------------------------------------------------------------------------------------------------------------- |
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267 /** |
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268 Check if the XFileCreationHelper object is initialised. |
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269 */ |
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270 TBool CFatMountCB::XFileCreationHelper::IsInitialised() const |
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271 { |
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272 return isInitialised; |
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273 } |
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274 |
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275 /** |
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276 Get number of new entries for file creation. |
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277 */ |
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278 TUint16 CFatMountCB::XFileCreationHelper::NumOfAddingEntries() const |
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279 { |
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280 ASSERT(isInitialised); |
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281 return iNumOfAddingEntries; |
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282 } |
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283 |
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284 /** |
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285 Get position of new entries for file creation. |
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286 */ |
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287 TEntryPos CFatMountCB::XFileCreationHelper::EntryAddingPos() const |
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288 { |
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289 ASSERT(isInitialised); |
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290 return iEntryAddingPos; |
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291 } |
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292 |
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293 /** |
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294 Check if position of new entries has been found. |
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295 */ |
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296 TBool CFatMountCB::XFileCreationHelper::IsNewEntryPosFound() const |
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297 { |
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298 ASSERT(isInitialised); |
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299 return isNewEntryPosFound; |
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300 } |
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301 |
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302 /** |
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303 Check if file name of the new file is a legal dos name. |
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304 */ |
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305 TBool CFatMountCB::XFileCreationHelper::IsTrgNameLegalDosName() const |
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306 { |
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307 ASSERT(isInitialised); |
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308 return isTrgNameLegalDosName; |
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309 } |
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310 |
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311 /** |
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312 Set entry position for new entries to be added. |
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313 */ |
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314 void CFatMountCB::XFileCreationHelper::SetEntryAddingPos(const TEntryPos& aEntryPos) |
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315 { |
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316 iEntryAddingPos = aEntryPos; |
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317 } |
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318 |
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319 /** |
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320 Set condition if position of new entries has been found. |
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321 */ |
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322 void CFatMountCB::XFileCreationHelper::SetIsNewEntryPosFound(TBool aFound) |
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323 { |
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324 isNewEntryPosFound = aFound; |
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325 } |
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326 |
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327 |
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328 //------- debug methods |
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329 #ifdef _DEBUG |
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330 /** |
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331 Debug function indicates whether write fails are active or not, for test |
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332 @return ETrue if write fails on or not |
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333 */ |
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334 TBool CFatMountCB::IsWriteFail()const |
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335 {return(iIsWriteFail);} |
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336 /** |
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337 Switches write fails on or off, for test |
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338 @param aIsWriteFail set true or false to set write fails on or off |
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339 */ |
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340 void CFatMountCB::SetWriteFail(TBool aIsWriteFail) |
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341 {iIsWriteFail=aIsWriteFail;} |
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342 |
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343 /** @return number of write fails to occur, for test */ |
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344 TInt CFatMountCB::WriteFailCount()const |
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345 {return(iWriteFailCount);} |
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346 |
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347 /** |
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348 Set the number of Write fails |
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349 @param aFailCount number of write fails, for test |
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350 */ |
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351 void CFatMountCB::SetWriteFailCount(TInt aFailCount) |
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352 {iWriteFailCount=aFailCount;} |
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353 |
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354 /** Decrement the number of write fails, for test */ |
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355 void CFatMountCB::DecWriteFailCount() |
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356 {--iWriteFailCount;} |
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357 |
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358 /** @return Error for a write failure, for test */ |
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359 TInt CFatMountCB::WriteFailError()const |
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360 {return iWriteFailError;} |
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361 |
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362 /** |
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363 Set the write fail error code, for test |
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364 @param aErrorValue The Error for a write fails |
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365 */ |
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366 void CFatMountCB::SetWriteFailError(TInt aErrorValue) |
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367 {iWriteFailError=aErrorValue;} |
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368 |
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369 #endif |
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370 |
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371 |
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372 //--------------------------------------------------------------------------------------------------------------------------------- |
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373 // class CFatFormatCB |
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374 |
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375 /** @return pointer to the owning mount object */ |
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376 CFatMountCB& CFatFormatCB::FatMount() |
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377 {return *(CFatMountCB*)&Mount();} |
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378 |
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379 /** |
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380 Returns the local drive used by the file systems from the owning mount |
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381 @return Pointer to the local drive |
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382 */ |
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383 CProxyDrive* CFatFormatCB::LocalDrive() |
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384 {return(FatMount().LocalDrive());} |
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385 |
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386 |
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387 //--------------------------------------------------------------------------------------------------------------------------------- |
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388 // class CFatFileCB |
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389 |
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390 /** |
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391 Returns the owning mount from file object |
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392 |
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393 @return pointer to the owning mount object |
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394 */ |
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395 CFatMountCB& CFatFileCB::FatMount() const |
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396 {return((CFatMountCB&)Mount());} |
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397 |
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398 /** |
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399 Returns the fat table used by the file system for this mount |
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400 |
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401 @return Refrence to the Fat table owned by the mount |
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402 */ |
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403 CFatTable& CFatFileCB::FAT() |
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404 {return(FatMount().FAT());} |
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405 |
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406 /** |
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407 Position with in a cluster for a given address |
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408 |
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409 @param aPos Byte position |
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410 */ |
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411 TInt CFatFileCB::ClusterRelativePos(TInt aPos) |
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412 {return(FatMount().ClusterRelativePos(aPos));} |
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413 /** |
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414 Returns Log2 of cluster size from mount |
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415 |
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416 @return cluster size |
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417 */ |
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418 TInt CFatFileCB::ClusterSizeLog2() |
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419 {return(FatMount().ClusterSizeLog2());} |
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420 |
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421 /* |
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422 Note: this replaces SeekIndex() which was only used in sl_mnt |
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423 to verify whether the seek index had been created/initialised |
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424 */ |
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425 inline TBool CFatFileCB::IsSeekIndex() const |
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426 {return (iSeekIndex==NULL?(TBool)EFalse:(TBool)ETrue); } |
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427 |
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428 |
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429 //--------------------------------------------------------------------------------------------------------------------------------- |
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430 // class CFatDirCB |
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431 |
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432 /** |
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433 Returns the owning mount from directory object |
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434 |
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435 @return pointer to the owning mount object |
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436 */ |
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437 CFatMountCB& CFatDirCB::FatMount() |
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438 {return((CFatMountCB&)Mount());} |
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439 |
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440 |
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441 |
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442 //--------------------------------------------------------------------------------------------------------------------------------- |
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443 // class CFatTable |
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444 |
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445 TUint32 CFatTable::FreeClusters() const |
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446 { |
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447 return iFreeClusters; |
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448 } |
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449 |
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450 TBool CFatTable::IsEof32Bit(TInt aCluster) const |
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451 {return(aCluster>=(TInt)0x0FFFFFF8 && aCluster<=(TInt)0x0FFFFFFF);} |
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452 |
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453 TBool CFatTable::IsEof16Bit(TInt aCluster) const |
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454 {return(aCluster>=0xFFF8 && aCluster<=0xFFFF);} |
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455 |
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456 TBool CFatTable::IsEof12Bit(TInt aCluster) const |
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457 {return(aCluster>=0xFF8 && aCluster<=0xFFF);} |
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458 |
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459 TInt CFatTable::SectorSizeLog2() const |
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460 {return(iOwner->SectorSizeLog2());} |
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461 |
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462 //--------------------------------------------------------------------------------------------------------------------------------- |
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463 |
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464 inline TFatType CFatTable::FatType() const |
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465 { |
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466 return iFatType; |
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467 } |
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468 |
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469 inline TBool CFatTable::IsFat12() const |
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470 { |
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471 return iFatType == EFat12; |
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472 } |
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473 |
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474 inline TBool CFatTable::IsFat16() const |
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475 { |
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476 return iFatType == EFat16; |
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477 } |
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478 |
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479 inline TBool CFatTable::IsFat32() const |
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480 { |
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481 return iFatType == EFat32; |
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482 } |
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483 |
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484 |
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485 /** |
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486 @return Maximal number of addresable FAT entries. This value is taken from the owning mount |
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487 */ |
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488 inline TUint32 CFatTable::MaxEntries() const |
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489 { |
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490 ASSERT(iMaxEntries > 0); |
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491 return iMaxEntries; |
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492 } |
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493 |
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494 |
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495 // class TFatDriveInterface |
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496 TBool TFatDriveInterface::NotifyUser() const |
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497 {return(iMount->GetNotifyUser());} |
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498 |
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499 |
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500 //---------------------------------------------------------------------------------------------------- |
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501 // class CRawDisk |
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502 |
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503 /** |
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504 Get pointer to the directory cache interface. Any client that reads/writes directory entries |
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505 MUST do it via this interface. |
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506 Default implementation returns NULL |
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507 |
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508 @return pointer to the MWTCacheInterface interface, or NULL if it is not present. |
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509 */ |
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510 MWTCacheInterface* CRawDisk::DirCacheInterface() |
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511 { |
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512 return NULL; |
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513 } |
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514 |
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515 //--------------------------------------------------------------------------------------------------------------------------------- |
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516 //-- class RBitVector |
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517 |
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518 /** @return size of the vector (number of bits) */ |
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519 inline TUint32 RBitVector::Size() const |
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520 { |
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521 return iNumBits; |
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522 } |
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523 |
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524 /** |
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525 Get a bit by index |
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526 |
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527 @param aIndex index in a bit vector |
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528 @return 0 if the bit at pos aIndex is 0, not zero otherwise |
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529 @panic EIndexOutOfRange if aIndex is out of range |
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530 */ |
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531 inline TBool RBitVector::operator[](TUint32 aIndex) const |
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532 { |
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533 __ASSERT_ALWAYS(aIndex < iNumBits, Panic(EIndexOutOfRange)); |
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534 return (ipData[WordNum(aIndex)] & (1<<BitInWord(aIndex))); |
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535 } |
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536 |
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537 /** |
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538 Set a bit at pos aIndex to '1' |
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539 @param aIndex index in a bit vector |
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540 @panic EIndexOutOfRange if aIndex is out of range |
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541 */ |
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542 inline void RBitVector::SetBit(TUint32 aIndex) |
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543 { |
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544 __ASSERT_ALWAYS(aIndex < iNumBits, Panic(EIndexOutOfRange)); |
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545 ipData[WordNum(aIndex)] |= (1<<BitInWord(aIndex)); |
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546 } |
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547 |
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548 /** |
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549 Set a bit at pos aIndex to '0' |
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550 @param aIndex index in a bit vector |
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551 @panic EIndexOutOfRange if aIndex is out of range |
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552 */ |
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553 inline void RBitVector::ResetBit(TUint32 aIndex) |
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554 { |
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555 __ASSERT_ALWAYS(aIndex < iNumBits, Panic(EIndexOutOfRange)); |
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556 ipData[WordNum(aIndex)] &= ~(1<<BitInWord(aIndex)); |
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557 } |
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558 |
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559 /** |
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560 Invert a bit at pos aIndex |
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561 @param aIndex index in a bit vector |
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562 @panic EIndexOutOfRange if aIndex is out of range |
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563 */ |
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564 inline void RBitVector::InvertBit(TUint32 aIndex) |
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565 { |
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566 __ASSERT_ALWAYS(aIndex < iNumBits, Panic(EIndexOutOfRange)); |
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567 ipData[WordNum(aIndex)] ^= (1<<BitInWord(aIndex)); |
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568 } |
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569 |
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570 /** |
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571 Set bit value at position aIndex |
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572 @param aIndex index in a bit vector |
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573 @panic EIndexOutOfRange if aIndex is out of range |
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574 */ |
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575 inline void RBitVector::SetBitVal(TUint32 aIndex, TBool aVal) |
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576 { |
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577 if(aVal) |
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578 SetBit(aIndex); |
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579 else |
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580 ResetBit(aIndex); |
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581 } |
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582 |
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583 |
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584 inline TUint32 RBitVector::MaskLastWord(TUint32 aVal) const |
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585 { |
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586 const TUint32 shift = (32-(iNumBits & 0x1F)) & 0x1F; |
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587 return (aVal << shift) >> shift; //-- mask unused high bits |
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588 } |
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589 |
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590 |
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591 |
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592 inline TUint32 RBitVector::WordNum(TUint32 aBitPos) const |
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593 { |
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594 return aBitPos >> 5; |
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595 } |
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596 |
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597 inline TUint32 RBitVector::BitInWord(TUint32 aBitPos) const |
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598 { |
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599 return aBitPos & 0x1F; |
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600 } |
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601 |
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602 /** |
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603 Calculate offset of the page starting position in the cluster |
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604 @param aPos the current entry position in bytes in the cluster |
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605 @param aPageSzLog2 page size in log2 |
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606 @return the starting position of the page that contains aPos |
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607 */ |
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608 inline TUint32 CalculatePageOffsetInCluster(TUint32 aPos, TUint aPageSzLog2) |
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609 { |
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610 return (aPos >> aPageSzLog2) << aPageSzLog2; |
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611 } |
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612 |
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613 #endif //SL_STD_INL |
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614 |
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615 |
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616 |
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617 |
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618 |