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1 // Copyright (c) 2006-2009 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 // IMAP Folder indexing |
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15 // |
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16 // |
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17 |
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18 #include "imappaniccodes.h" |
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19 #include "cimapfolderindex.h" |
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20 |
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21 // Illegal UID we use for marker |
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22 const TUint KIllegalUID = 0xffffffff; |
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23 |
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24 CImapFolderIndexEntry::CImapFolderIndexEntry() |
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25 { |
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26 // Default values |
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27 iUid = 0; |
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28 iMsvId = -1; |
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29 } |
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30 |
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31 CImapFolderIndexEntry::CImapFolderIndexEntry(CImapFolderIndexEntry& aFrom) |
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32 { |
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33 // Copy entry |
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34 iUid = aFrom.iUid; |
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35 iMsvId = aFrom.iMsvId; |
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36 } |
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37 |
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38 CImapFolderIndexEntry& CImapFolderIndexEntry::operator = (CImapFolderIndexEntry& aFrom) |
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39 { |
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40 // Copy entry |
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41 iUid = aFrom.iUid; |
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42 iMsvId = aFrom.iMsvId; |
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43 return(*this); |
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44 } |
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45 |
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46 CImapFolderIndex::CImapFolderIndex() |
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47 { |
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48 __DECLARE_NAME(_S("CImapFolderIndex")); |
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49 } |
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50 |
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51 CImapFolderIndex::~CImapFolderIndex() |
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52 { |
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53 // Dispose of index |
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54 delete iIndex; |
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55 } |
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56 |
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57 void CImapFolderIndex::Reset() |
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58 { |
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59 // Dispose of index |
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60 delete iIndex; |
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61 iIndex = NULL; |
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62 iSize = 0; |
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63 } |
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64 |
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65 void CImapFolderIndex::SetSizeL(const TUint aEntries) |
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66 { |
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67 // Set number of entries |
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68 if (!iIndex) |
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69 { |
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70 // Create new array (granularity 8 entries) |
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71 iIndex = new (ELeave) CArrayFixFlat<CImapFolderIndexEntry>(8); |
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72 } |
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73 |
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74 // Alter size, filling unused entries with 0xffffffff |
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75 CImapFolderIndexEntry blank; |
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76 blank.iUid = KIllegalUID; |
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77 blank.iMsvId = 0; |
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78 iIndex->ResizeL(aEntries,blank); |
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79 |
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80 // Save new size |
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81 iSize = aEntries; |
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82 } |
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83 |
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84 TInt CImapFolderIndex::Size() const |
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85 { |
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86 // Return current size |
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87 return(iSize); |
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88 } |
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89 |
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90 void CImapFolderIndex::SetUid(const TUint aMsgNr, const TUint aMsgUid) |
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91 { |
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92 __ASSERT_ALWAYS(aMsgNr <= TUint(iSize),User::Panic(_L("CImapFolderIndex"), TImapServerPanic::EMsgnrOutOfRange)); |
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93 |
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94 // Is UID already set? |
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95 if ((*iIndex)[aMsgNr-1].iUid != KIllegalUID && (*iIndex)[aMsgNr-1].iUid != aMsgUid) |
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96 { |
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97 // CHANGING a UID? No way! |
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98 User::Panic(_L("CImapFolderIndex"),TImapServerPanic::ECantChangeUID); |
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99 } |
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100 |
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101 // Set a UID for a message number |
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102 (*iIndex)[aMsgNr-1].iUid = aMsgUid; |
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103 } |
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104 |
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105 void CImapFolderIndex::SetMsvId(const TUint aMsgNr, const TMsvId aMsvId) |
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106 { |
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107 __ASSERT_ALWAYS(aMsgNr <= TUint(iSize),User::Panic(_L("CImapFolderIndex"), TImapServerPanic::EMsgnrOutOfRange)); |
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108 |
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109 // Is MsvId already set? |
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110 if ((*iIndex)[aMsgNr-1].iMsvId != 0 && (*iIndex)[aMsgNr-1].iMsvId != aMsvId) |
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111 { |
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112 // CHANGING a MsvId? No way! |
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113 User::Panic(_L("CImapFolderIndex"), TImapServerPanic::ECantChangeMsvId); |
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114 } |
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115 |
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116 // Set a MsvId for a message number |
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117 (*iIndex)[aMsgNr-1].iMsvId = aMsvId; |
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118 } |
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119 |
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120 void CImapFolderIndex::Expunge(const TUint aMsgNr) |
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121 { |
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122 __ASSERT_ALWAYS(aMsgNr <= TUint(iSize),User::Panic(_L("CImapFolderIndex"),TImapServerPanic::EMsgnrOutOfRange)); |
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123 |
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124 // Remove entry from index |
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125 iIndex->Delete(aMsgNr-1); |
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126 iSize--; |
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127 } |
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128 |
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129 TUint CImapFolderIndex::FindMsg(const TUint aMsgUid) |
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130 { |
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131 __ASSERT_ALWAYS(iSize>0,User::Panic(_L("CImapFolderIndex"),TImapServerPanic::EIndexEmpty)); |
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132 |
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133 // Binary search. |
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134 TInt max = iIndex->Count() - 1; //max index |
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135 TInt min = 0; //min index |
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136 TInt index; |
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137 |
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138 index = max/2; |
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139 |
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140 while (((*iIndex)[index].iUid != aMsgUid) && (min <= max)) |
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141 { |
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142 if ((*iIndex)[index].iUid > aMsgUid) |
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143 { |
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144 max = --index; |
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145 } |
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146 else |
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147 { |
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148 min = ++index; |
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149 } |
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150 |
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151 index = (max + min)/2; |
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152 } |
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153 |
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154 if(index < iIndex->Count()) |
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155 { |
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156 if((*iIndex)[index].iUid == aMsgUid) |
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157 { |
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158 return(++index); |
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159 } |
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160 } |
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161 |
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162 // Failure (0 not a legal message number) |
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163 return(0); |
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164 } |
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165 |
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166 // Access entry directly |
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167 CImapFolderIndexEntry& CImapFolderIndex::operator[] (const TInt aIndex) |
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168 { |
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169 return((*iIndex)[aIndex]); |
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170 } |
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171 |
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172 // Sort index by UID |
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173 void CImapFolderIndex::Sort() |
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174 { |
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175 // Sorting object |
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176 TKeyArrayFix uidKey(_FOFF(CImapFolderIndexEntry,iUid),ECmpTUint32); |
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177 |
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178 // Perform the sort |
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179 iIndex->Sort(uidKey); |
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180 } |