Last change
on this file since 665 was 665, checked in by イグトランス (egtra), 15 years ago |
TextWriter同様TextReaderでバッファリングし、StreamReaderはMultiByteToWideChar固定で仮実装。これで、マルチバイトモードでもStringReaderが使えるようにした。
(#235)
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File size:
1.8 KB
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[432] | 1 | 'Classes/System/IO/StreamReader.ab
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| 2 |
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[271] | 3 | Namespace System
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| 4 | Namespace IO
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| 5 |
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[432] | 6 | /*
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| 7 | @brief ストリームから読み取りを行うTextReaderの実装。
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| 8 | @date 2008/02/25
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| 9 | @auther Egtra
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| 10 | */
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[426] | 11 | Class StreamReader
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| 12 | Inherits TextReader
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| 13 | Public
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[432] | 14 | /*
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| 15 | @date 2008/02/25
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| 16 | @auther Egtra
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| 17 | */
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[426] | 18 | Sub StreamReader(path As String)
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| 19 | init(New FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))
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| 20 | End Sub
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[271] | 21 |
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[432] | 22 | /*
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| 23 | @date 2008/02/25
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| 24 | @auther Egtra
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| 25 | */
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[426] | 26 | Sub StreamReader(stream As Stream)
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| 27 | init(stream)
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| 28 | End Sub
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| 29 |
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[627] | 30 | Public
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[432] | 31 | /*
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[627] | 32 | @brief 基になるストリームを取得する
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| 33 | @date 2008/09/02
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| 34 | @auther NoWest
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| 35 | */
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| 36 | Function BaseStream () As Stream
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| 37 | Return s
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| 38 | End Function
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| 39 |
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[426] | 40 |
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[432] | 41 | Protected
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| 42 | /*
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| 43 | @date 2008/02/25
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| 44 | @auther Egtra
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| 45 | */
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| 46 | Override Sub Dispose(disposing As Boolean)
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| 47 | If disposing Then
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| 48 | If Not ActiveBasic.IsNothing(s) Then
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| 49 | s.Dispose(True)
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| 50 | End If
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[426] | 51 | End If
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[432] | 52 | s = Nothing
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| 53 | End Sub
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[426] | 54 |
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[432] | 55 | /*
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[665] | 56 | @date 2008/12/27
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[432] | 57 | @auther Egtra
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| 58 | */
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[665] | 59 | Override Function Underflow() As Boolean
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| 60 | Dim wcBuf[4095] As WCHAR
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| 61 | Dim mbBuf[4095] As SByte
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| 62 | Dim mbLen = s.Read(mbBuf As *Byte, 0, Len(buf))
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| 63 | If mbLen = 0 Then
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| 64 | Underflow = False
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[426] | 65 | Exit Function
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| 66 | End If
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[665] | 67 | Dim pNext = mbBuf As PSTR
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| 68 | Do
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| 69 | Dim q = CharNextExA(cp, pNext, 0)
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| 70 | If q = pNext Then
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| 71 | Exit Do
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| 72 | End If
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| 73 | pNext = q As PSTR
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| 74 | Loop
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| 75 | If pNext <> mbBuf + mbLen Then
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| 76 | leadByte = mbBuf[mbLen - 1]
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[426] | 77 | End If
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[665] | 78 | Dim wcLen = MultiByteToWideChar(cp, 0, mbBuf, (pNext - mbBuf) As Long, wcBuf, 4095)
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| 79 | Dim s = New String(wcBuf, wcLen)
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| 80 | Dim buf = Buffer
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| 81 | buf.Append(s)
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| 82 | Underflow = True
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[426] | 83 | End Function
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[665] | 84 | Private
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[426] | 85 |
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[432] | 86 | /*
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| 87 | @date 2008/02/25
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| 88 | @auther Egtra
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| 89 | */
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[426] | 90 | Sub init(str As Stream)
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| 91 | s = str
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[665] | 92 | cp = CP_ACP '暫定。
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| 93 | leadByte = 0
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[426] | 94 | End Sub
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| 95 |
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| 96 | s As Stream
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[665] | 97 | cp As Word
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| 98 | leadByte As Byte
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[271] | 99 | End Class
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| 100 |
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| 101 | End Namespace
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| 102 | End Namespace
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