[256] | 1 |
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| 2 | /* ほんとはmiscかファイルを分けたほうがいいかもしれないが一先ず実装 */
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| 3 | Enum FileOptions
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| 4 | Asynchronous
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| 5 | DeleteOnClose
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| 6 | Encrypted
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| 7 | None
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| 8 | RandomAccess
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| 9 | SequentialScan
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| 10 | WriteThrough
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| 11 | End Enum
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| 12 |
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[105] | 13 | Class FileStream
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[256] | 14 | Inherits Stream
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| 15 |
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| 16 | handle As HANDLE
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| 17 |
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| 18 | /*
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| 19 | ファイルハンドルからこれらを取得できれば入らないが
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| 20 | 今のところは不明なので自前で実装するしかない
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| 21 | */
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| 22 | filePath As String
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| 23 | fileMode As DWord
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| 24 | fileAccess As DWord
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| 25 | fileShare As DWord
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| 26 | fileOptions As DWord
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| 27 |
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| 28 | /* 現在は未使用 */
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| 29 | /*Overlapped As OVERLAPPED*/
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| 30 |
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| 31 | Public
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| 32 | /* コンストラクタ.NETと同じように実装は難しい、一先ず動くものを実装したが要変更だと思う */
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| 33 | Sub FileStream(path As String, mode As FileMode, access As FileAccess, share As FileShare, options As FileOptions)
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| 34 | Dim acc As DWord
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| 35 | Dim mod As DWord
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| 36 | Dim sha As DWord
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| 37 | Dim opt As DWord
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| 38 |
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| 39 | Select Case access
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| 40 | Case FileAccess.Read
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| 41 | acc=GENERIC_READ
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| 42 | Case FileAccess.ReadWrite
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| 43 | acc=GENERIC_READ or GENERIC_WRITE
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| 44 | Case FileAccess.Write
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| 45 | acc=GENERIC_WRITE
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| 46 | End Select
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| 47 |
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| 48 | Select Case share
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| 49 | Case FileShare.DeleteFile
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| 50 | sha=FILE_SHARE_DELETE
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| 51 | Case FileShare.None
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| 52 | sha=0
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| 53 | Case FileShare.Read
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| 54 | sha=FILE_SHARE_READ
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| 55 | Case FileShare.ReadWrite
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| 56 | sha=FILE_SHARE_READ or FILE_SHARE_WRITE
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| 57 | Case Write
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| 58 | sha=FILE_SHARE_WRITE
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| 59 | End Select
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| 60 |
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| 61 | Select Case mode
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| 62 | Case FileMode.Append
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| 63 | mo=OPEN_ALWAYS
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| 64 | Case FileMode.Create
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| 65 | mo=CREATE_ALWAYS
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| 66 | Case FileMode.CreateNew
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| 67 | mo=CREATE_NEW
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| 68 | Case FileMode.Open
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| 69 | mo=OPEN_EXISTING
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| 70 | Case FileMode.OpenOrCreate
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| 71 | mo=OPEN_ALWAYS
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| 72 | Case FileMode.Truncate
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| 73 | mo=TRUNCATE_EXISTING
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| 74 | End Select
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| 75 |
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| 76 | Select Case options
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| 77 | Case FileOption.Asynchronous
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| 78 | opt=FILE_FLAG_OVERLAPPED
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| 79 | Case FileOptions.DeleteOnClose
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| 80 | opt=FILE_FLAG_DELETE_ON_CLOSE
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| 81 | Case FileOptions.Encrypted
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| 82 | Case FileOptions.None
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| 83 | opt=0
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| 84 | Case FileOptions.RandomAccess
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| 85 | opt=FILE_FLAG_RANDOM_ACCESS
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| 86 | Case FileOptions.SequentialScan
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| 87 | opt=FILE_FLAG_SEQUENTIAL_SCAN
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| 88 | Case FileOptions.WriteThrough
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| 89 | opt=FILE_FLAG_WRITE_THROUGH
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| 90 | End Select
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| 91 |
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| 92 | This.handle=CreateFile(path.Chars As PSTR,acc,sha,ByVal NULL,mo,opt,0)
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| 93 | If This.handle=HANDLE_INVALIDATE Then
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| 94 | 'エラー処理
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| 95 | 'Throw ArgumentException
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| 96 | 'Throw IOException
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| 97 | 'Throw System.IO.FileNotFoundException
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| 98 | Exit Sub
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| 99 | End If
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| 100 |
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| 101 | fileMode = mod
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| 102 | fileAccess = acc
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| 103 | fileShare = sha
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| 104 | fileOptions = opt
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| 105 | End Sub
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| 106 | Sub FileStream(path As String, mode As FileMode)
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| 107 | Dim acc As DWord
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| 108 | Dim mo As DWord
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| 109 | Select Case mode
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| 110 | Case FileMode.Append
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| 111 | acc=GENERIC_WRITE
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| 112 | mo=OPEN_ALWAYS
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| 113 | ' OutputDebugString(Ex"append\n")
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| 114 | Case FileMode.Create
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| 115 | acc=GENERIC_READ or GENERIC_WRITE
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| 116 | mo=CREATE_ALWAYS
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| 117 | ' OutputDebugString(Ex"create\n")
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| 118 | Case FileMode.CreateNew
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| 119 | acc=GENERIC_READ or GENERIC_WRITE
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| 120 | mo=CREATE_NEW
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| 121 | ' OutputDebugString(Ex"create new\n")
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| 122 | Case FileMode.Open
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| 123 | acc=GENERIC_READ or GENERIC_WRITE
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| 124 | mo=OPEN_EXISTING
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| 125 | ' OutputDebugString(Ex"open\n")
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| 126 | Case FileMode.OpenOrCreate
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| 127 | acc=GENERIC_READ or GENERIC_WRITE
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| 128 | mo=OPEN_ALWAYS
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| 129 | ' OutputDebugString(Ex"open or create\n")
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| 130 | Case FileMode.Truncate
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| 131 | acc=GENERIC_WRITE
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| 132 | mo=TRUNCATE_EXISTING
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| 133 | ' OutputDebugString(Ex"truncate\n")
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| 134 | End Select
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| 135 |
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| 136 | 'ファイルを作成または開く
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| 137 | This.handle=CreateFile(path.Chars As PSTR,acc,0,ByVal NULL,mo,0,0)
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| 138 |
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| 139 | 'エラー処理
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| 140 | 'Throw ArgumentException
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| 141 | 'Throw IOException
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| 142 | 'Throw System.IO.FileNotFoundException
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| 143 |
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| 144 |
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| 145 | 'ファイルを作成または開いた後の処理
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| 146 | If mode=FileMode.Append Then
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| 147 | SetFilePointer(This.handle,0,NULL,FILE_END)
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| 148 | End If
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| 149 | End Sub
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| 150 |
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| 151 | Sub ~FileStream()
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| 152 | This.Flush()
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| 153 | This.Close()
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| 154 | End Sub
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| 155 |
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| 156 | Public
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| 157 | Override Function CanRead() As Boolean
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| 158 | /* ファイルが読み込みに対応しているかを返す */
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| 159 | If fileAccess=GENERIC_READ/*FileAccess.Read*/ or fileAccess=GENERIC_READ or GENERIC_WRITE/*FileAccess.ReadWrite*/ Then
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| 160 | Return True
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| 161 | Else
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| 162 | Return False
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| 163 | End If
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| 164 | End Function
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| 165 |
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| 166 | Override Function CanSeek() As Boolean
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| 167 | /* ファイルがシークに対応しているかを返す */
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| 168 | Return True
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| 169 | End Function
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| 170 |
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| 171 | Override Function CanTimeout() As Boolean
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| 172 | /* ファイルがタイムアウトに対応しているかを返す */
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| 173 | Return False /*今のところ対応していないのでFalse*/
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| 174 | End Function
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| 175 |
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| 176 | Override Function CanWrite() As Boolean
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| 177 | /* ファイルが書き込みに対応しているかを返す */
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| 178 | If fileAccess=GENERIC_WRITE/*FileAccess.Write*/ or fileAccess=GENERIC_READ or GENERIC_WRITE/*FileAccess.ReadWrite*/ Then
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| 179 | Return True
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| 180 | Else
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| 181 | Return False
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| 182 | End If
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| 183 | End Function
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| 184 |
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| 185 | /*Handle*/
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| 186 |
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| 187 | Function IsAsync() As Boolean
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| 188 | /* ファイルが非同期操作に対応しているかを返す */
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| 189 | If fileOptions=FILE_FLAG_OVERLAPPED/*FileOptions.Asynchronous*/ Then
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| 190 | Return True
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| 191 | Else
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| 192 | Return False
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| 193 | End If
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| 194 | End Function
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| 195 |
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| 196 | Override Function Length() As Int64
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| 197 | /* ファイルのサイズの取得 */
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| 198 | Dim s As LARGE_INTEGER
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| 199 | s.LowPart=GetFileSize(This.handle,VarPtr(s.HighPart) As *DWord)
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| 200 | memcpy(VarPtr(Length),VarPtr(s),SizeOf(LARGE_INTEGER))
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| 201 | End Function
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| 202 |
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| 203 | Function Name() As String
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| 204 | /* 多分文字列をコピーして返す方がいいのと思うが。。。*/
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| 205 | Return filePath
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| 206 | End Function
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| 207 |
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| 208 | Override Sub Position(value As Int64)
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| 209 | /* ファイルポインタの位置の設定 */
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| 210 | Dim o As LARGE_INTEGER
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| 211 | memcpy(VarPtr(o),VarPtr(value),SizeOf(LARGE_INTEGER))
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| 212 | If o.HighPart=0 And value<0 Then
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| 213 | o.LowPart=-Abs(o.LowPart) As Long
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| 214 | End If
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| 215 | Dim ret As LARGE_INTEGER
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| 216 | SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_CURRENT)
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| 217 | End Sub
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| 218 | Override Function Position() As Int64
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| 219 | /* ファイルポインタの位置の取得 */
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| 220 | Dim o As LARGE_INTEGER
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| 221 | o.HighPart=0
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| 222 | o.LowPart=0
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| 223 | o.LowPart=SetFilePointer(This.handle,0,VarPtr(o.HighPart) As *DWord,FILE_CURRENT)
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| 224 | memcpy(VarPtr(Position),VarPtr(o),SizeOf(LARGE_INTEGER))
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| 225 | End Function
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| 226 |
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| 227 | Override Sub ReadTimeout(value As Long)
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| 228 | 'TODO
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| 229 | End Sub
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| 230 | Override Function ReadTimeout() As Long
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| 231 | 'TODO
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| 232 | End Function
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| 233 |
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| 234 | /* Safe~Handle系の実装は要相談!! */
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| 235 | /* Function SafeFileHandle() As SafeFileHandle
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| 236 | End Function*/
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| 237 |
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| 238 | Override Sub WriteTimeout(value As Long)
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| 239 | 'TODO
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| 240 | End Sub
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| 241 | Override Function WriteTimeout() As Long
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| 242 | 'TODO
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| 243 | End Function
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| 244 |
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| 245 |
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| 246 | Public
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| 247 | Override Function BeginRead(ByRef buffer[] As Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As IAsyncResult
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| 248 | 'TODO
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| 249 | End Function
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| 250 |
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| 251 | Override Function BeginWrite(ByRef buffer[] As Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As IAsyncResult
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| 252 | 'TODO
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| 253 | End Function
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| 254 |
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| 255 | Override Sub Close()
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| 256 | CloseHandle(This.handle)
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| 257 | End Sub
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| 258 |
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| 259 | /* CreateObjRef*/
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| 260 | /* Dispose*/
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| 261 |
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| 262 | Override Sub EndRead(ByRef asyncResult As IAsyncResult)
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| 263 | 'TODO
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| 264 | End Sub
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| 265 |
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| 266 | Override Sub EndWrite(ByRef asyncResult As IAsyncResult)
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| 267 | 'TODO
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| 268 | End Sub
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| 269 |
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| 270 | /* Equals*/
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| 271 |
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| 272 | Override Sub Flush()
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| 273 | FlushFileBuffers(This.handle)
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| 274 | End Sub
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| 275 |
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| 276 | /* Function GetAccessControl() As FileSecurity
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| 277 | FileSecurityの実装がまだできてない。
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| 278 | End Function*/
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| 279 |
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| 280 | Override Function GetHashCode() As Long
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| 281 | Return ObjPtr(This) As Long
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| 282 | End Function
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| 283 |
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| 284 | /* GetLifetimeService*/
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| 285 |
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| 286 | /* Override Function GetType() As TypeInfo
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| 287 | Return Super.GetType()
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| 288 | End Function*/
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| 289 |
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| 290 | /* InitializeLifetimeService*/
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| 291 |
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| 292 | Sub Lock(position As Int64, length As Int64)
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| 293 | Dim p As LARGE_INTEGER
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| 294 | Dim l As LARGE_INTEGER
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| 295 | memcpy(VarPtr(p),VarPtr(position),SizeOf(LARGE_INTEGER))
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| 296 | memcpy(VarPtr(l),VarPtr(length),SizeOf(LARGE_INTEGER))
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| 297 | LockFile(This.handle,p.LowPart,p.HighPart,l.LowPart,l.HighPart)
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| 298 | End Sub
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| 299 |
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| 300 | Override Function Read(ByRef buffer[] As Byte, offset As Long, count As Long) As Long
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| 301 | If offset Then
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| 302 | SetFilePointer(This.handle,offset,NULL,FILE_CURRENT)
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| 303 | End If
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| 304 | ReadFile(This.handle,buffer,count,VarPtr(Read) As *DWord,ByVal NULL)
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| 305 | End Function
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| 306 |
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| 307 | Override Function ReadByte() As Long
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| 308 | Dim b As Byte
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| 309 | Dim ret = Read(b, 0, 1)
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| 310 | If ret <> 0 Then
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| 311 | Return b As Long
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| 312 | Else
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| 313 | Return -1
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| 314 | End If
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| 315 | End Function
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| 316 | /* ReferenceEquals*/
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| 317 |
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| 318 | Override Function Seek(offset As Int64, origin As SeekOrigin) As Long
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| 319 | Dim o As LARGE_INTEGER
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| 320 | memcpy(VarPtr(o),VarPtr(offset),SizeOf(LARGE_INTEGER))
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| 321 | If o.HighPart=0 And offset<0 Then
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| 322 | o.LowPart=-o.LowPart
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| 323 | End If
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| 324 | Select Case origin
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| 325 | Case SeekOrigin.Begin
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| 326 | SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_BEGIN)
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| 327 | Case SeekOrigin.Current
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| 328 | SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_CURRENT)
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| 329 | Case SeekOrigin.End
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| 330 | SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_END)
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| 331 | End Select
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| 332 | End Function
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| 333 |
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| 334 | /* Sub SetAccessControl(fileSecurity As FileSecurity)
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| 335 | FileSecurityの実装がまだできてない。
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| 336 | End Sub*/
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| 337 |
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| 338 | Override Sub SetLength(value As Int64)
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| 339 | Dim o As LARGE_INTEGER
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| 340 | memcpy(VarPtr(o),VarPtr(value),SizeOf(LARGE_INTEGER))
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| 341 | If o.HighPart=0 And value<0 Then
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| 342 | o.LowPart=-o.LowPart
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| 343 | End If
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| 344 | If Length()=>value Then
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| 345 | SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_BEGIN)
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| 346 | SetEndOfFile(This.handle)
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| 347 | End If
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| 348 | End Sub
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| 349 |
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| 350 | /* Synchronized*/
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| 351 |
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| 352 | Override Function ToString() As String
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| 353 | Return Name()
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| 354 | End Function
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| 355 |
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| 356 | Sub Unlock(position As Int64, length As Int64)
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| 357 | Dim p As LARGE_INTEGER
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| 358 | Dim l As LARGE_INTEGER
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| 359 | memcpy(VarPtr(p),VarPtr(position),SizeOf(LARGE_INTEGER))
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| 360 | memcpy(VarPtr(l),VarPtr(length),SizeOf(LARGE_INTEGER))
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| 361 | UnlockFile(This.handle,p.LowPart,p.HighPart,l.LowPart,l.HighPart)
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| 362 | End Sub
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| 363 |
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| 364 | Override Sub Write(ByRef buffer[] As Byte, offset As Long, count As Long)
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| 365 | If offset Then
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| 366 | SetFilePointer(This.handle,offset,NULL,FILE_CURRENT)
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| 367 | End If
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| 368 | Dim ret As DWord
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| 369 | WriteFile(This.handle,buffer,count,VarPtr(ret),ByVal NULL)
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| 370 | End Sub
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| 371 |
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| 372 | Override Sub WriteByte(b As Byte)
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| 373 | Write(b, 0, 1)
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| 374 | End Sub
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| 375 |
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| 376 | Protected
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| 377 | /*非同期ファイル操作に必須だがどうやって実装しようか検討中*/
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| 378 | Override Function CreateWaitHandle() As WaitHandle
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| 379 | ' Return Nothing
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| 380 | End Function
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| 381 |
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| 382 | /* Dispose
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| 383 | Finalize
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| 384 | MemberwiseClone*/
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[105] | 385 | End Class
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