1 | 'TODO: ローカルオブジェクト確保及び解放時にTryServiceに通知する必要がある。
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2 |
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3 | Class TryLayer
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4 | Public
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5 | Const catchTable As *LONG_PTR
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6 | Const addressOfFinally As VoidPtr
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7 | Const basePtr As LONG_PTR
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8 | Const stackPtr As LONG_PTR
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9 |
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10 | Const debugProcNum As DWord
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11 |
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12 | Sub TryLayer( catchTable As *LONG_PTR, addressOfFinally As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR )
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13 | This.catchTable = catchTable
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14 | This.addressOfFinally = addressOfFinally
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15 | This.basePtr = basePtr
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16 | This.stackPtr = stackPtr
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17 |
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18 | #ifdef _DEBUG
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19 | Dim ThreadNum As Long
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20 | ThreadNum=_DebugSys_GetThread()
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21 | If ThreadNum <> -1 Then
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22 | debugProcNum = _DebugSys_ProcNum[ThreadNum]
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23 | End If
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24 | #endif
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25 | End Sub
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26 | Sub ~TryLayer()
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27 | End Sub
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28 |
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29 | Sub FinishFinally()
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30 | If Thread.CurrentThread().__IsThrowing() Then
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31 | Throw Thread.CurrentThread().__GetThrowintParamObject()
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32 | End If
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33 | End Sub
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34 |
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35 | Function ResolveCatchesOverload( ex As Object ) As LONG_PTR
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36 | Dim defaultCatchCodePos = 0 As LONG_PTR
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37 | Dim pos = 0 As Long
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38 | While catchTable[pos]
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39 | ' パラメータのクラス名
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40 | Dim paramName = catchTable[pos] As *Char
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41 | pos ++
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42 |
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43 | ' コード位置
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44 | Dim codePos = catchTable[pos] As LONG_PTR
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45 | pos ++
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46 |
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47 | If paramName[0] = 0 Then
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48 | ' Default Catch
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49 | defaultCatchCodePos = codePos
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50 | End If
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51 |
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52 | If Object.ReferenceEquals( ex, Nothing ) Then
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53 | ' パラメータなしのとき
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54 | If paramName[0] = 0 Then
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55 | ' マッチしたとき
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56 | Return codePos
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57 | End If
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58 | Else
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59 | If lstrcmp( paramName, ex.GetType().FullName ) = 0 Then
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60 | ' マッチしたとき
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61 | Return codePos
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62 | End If
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63 | End If
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64 | Wend
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65 | Return defaultCatchCodePos
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66 | End Function
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67 | End Class
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68 |
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69 | Class ExceptionService
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70 | ppTryLayers As **TryLayer
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71 | nTryLayers As Long
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72 |
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73 | Sub FreeLocalObjects()
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74 | 'TODO: 破棄されていないローカルオブジェクトを破棄
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75 | End Sub
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76 | Public
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77 |
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78 | Sub ExceptionService()
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79 | ppTryLayers = _System_malloc( 1 )
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80 | nTryLayers = 0
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81 | End Sub
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82 | Sub ~ExceptionService()
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83 | Dim i As Long
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84 | For i = 0 To ELM( nTryLayers )
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85 | Delete ppTryLayers[i]
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86 | Next
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87 | _System_free( ppTryLayers )
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88 | ppTryLayers = 0
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89 | End Sub
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90 |
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91 | 'Try
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92 | Function _BeginTryScope( catchTable As *LONG_PTR, addressOfFinally As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR ) As TryLayer
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93 | ppTryLayers = _System_realloc( ppTryLayers, ( nTryLayers + 1 ) * SizeOf( *TryLayer ) )
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94 | ppTryLayers[nTryLayers] = New TryLayer( catchTable, addressOfFinally, basePtr, stackPtr )
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95 | nTryLayers++
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96 |
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97 | Return ByVal ppTryLayers[nTryLayers-1]
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98 | End Function
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99 |
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100 | Static Function BeginTryScope( catchTable As *LONG_PTR, addressOfFinally As VoidPtr, basePtr As LONG_PTR, stackPtr As LONG_PTR ) As TryLayer
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101 | Return _System_pobj_AllThreads->GetCurrentException()->_BeginTryScope( catchTable, addressOfFinally, basePtr, stackPtr )
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102 | End Function
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103 |
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104 | 'End Try
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105 | Sub EndTryScope()
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106 | nTryLayers--
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107 | Delete ppTryLayers[nTryLayers]
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108 | End Sub
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109 |
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110 | 'Throw
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111 | Sub _Throw( ex As Object )
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112 | If nTryLayers <= 0 then
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113 | '例外処理スコープ制御が無効なとき
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114 |
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115 | 'TODO: 適切なエラー処理
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116 | MessageBox( NULL, "例外", "", MB_OK or MB_ICONEXCLAMATION )
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117 |
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118 | Return
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119 | End If
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120 |
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121 | ' スレッドへThrow処理を開始したことを通知
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122 | Thread.CurrentThread().__Throw( ex )
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123 |
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124 | '未解放なローカルオブジェクトを解放する
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125 | FreeLocalObjects()
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126 |
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127 | Dim pTryLayer = ppTryLayers[nTryLayers - 1] As *TryLayer
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128 |
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129 | Dim addressOfCatch = pTryLayer->ResolveCatchesOverload( ex ) As LONG_PTR
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130 | If addressOfCatch = NULL Then
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131 | ' Catchが定義されていないときはFinallyへ誘導
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132 | addressOfCatch = pTryLayer->addressOfFinally As LONG_PTR
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133 | End If
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134 |
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135 |
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136 | '--------------------------------------------------
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137 | ' スレッドのコンテキストを設定(Catchへ遷移する)
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138 | '--------------------------------------------------
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139 |
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140 | Dim context As CONTEXT
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141 | context.ContextFlags = CONTEXT_CONTROL or CONTEXT_INTEGER
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142 | If GetThreadContext( GetCurrentThread(), context ) = 0 Then
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143 | ' TODO: エラー処理
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144 | debug
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145 | End If
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146 |
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147 | '新しいip, sp, bpをセット
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148 | #ifdef _WIN64
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149 | context.Rip = addressOfCatch As QWord
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150 | context.Rbp = pTryLayer->basePtr
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151 | context.Rsp = pTryLayer->stackPtr
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152 | #else
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153 | context.Eip = addressOfCatch As DWord
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154 | context.Ebp = pTryLayer->basePtr
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155 | context.Esp = pTryLayer->stackPtr
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156 | #endif
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157 |
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158 | #ifdef _DEBUG
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159 | Dim ThreadNum As Long
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160 | ThreadNum=_DebugSys_GetThread()
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161 | If ThreadNum <> -1 Then
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162 | _DebugSys_ProcNum[ThreadNum] = pTryLayer->debugProcNum-1
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163 | End If
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164 | #endif
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165 |
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166 | If SetThreadContext( GetCurrentThread(), context ) = 0 Then
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167 | OutputDebugString(Ex"レジスタ情報の設定に失敗しました。\r\n")
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168 | Return
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169 | End If
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170 | End Sub
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171 |
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172 | Sub _ThrowWithParam( ex As Object )
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173 | _Throw( ex )
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174 | End Sub
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175 |
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176 | Sub _ThrowNoneParam()
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177 | _Throw( Nothing )
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178 | End Sub
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179 |
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180 | Sub FinishFinally()
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181 | Dim pTryLayer = ppTryLayers[nTryLayers - 1] As *TryLayer
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182 | pTryLayer->FinishFinally()
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183 | End Sub
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184 | End Class
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185 |
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