1 | /*
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2 | @file Include/Classes/System/IO/StreamWriter.ab
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3 | @brief StreamWriterの実装。
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4 | */
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5 |
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6 | Namespace System
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7 | Namespace IO
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8 |
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9 | /*
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10 | @brief ストリームへの書き込みを行うTextWriterの派生。
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11 | @date 2008/03/09
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12 | @auther Egtra
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13 | */
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14 | Class StreamWriter
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15 | Inherits TextWriter
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16 | Public
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17 | /*
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18 | @date 2008/03/09
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19 | @auther Egtra
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20 | */
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21 | Sub StreamWriter(path As String)
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22 | init(New FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None))
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23 | End Sub
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24 |
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25 | /*
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26 | @date 2008/03/09
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27 | @auther Egtra
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28 | */
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29 | Sub StreamWriter(stream As Stream)
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30 | init(stream)
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31 | End Sub
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32 |
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33 | /*
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34 | @brief 基になるストリームを取得する
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35 | @date 2008/09/02
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36 | @auther NoWest
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37 | */
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38 | Function BaseStream () As System.IO.Stream
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39 | Return s
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40 | End Function
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41 |
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42 | Override Sub Flush()
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43 | Dim buf = Buffer()
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44 | Dim pws As PCWSTR
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45 | Dim size = GetWCStr(buf.ToString(), pws)
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46 | Dim pwsEnd = VarPtr(pws[size])
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47 | Dim charConverted As Long
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48 | Dim byteBuf[4095] As Byte
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49 | Dim byteSize As Long
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50 | Dim completed As Boolean
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51 | Do
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52 | Dim converted As Long
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53 | encoder.Convert(pws, size, byteBuf, Len(byteBuf), False, charConverted, byteSize, completed)
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54 | s.Write(byteBuf, 0, byteSize)
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55 | pws = VarPtr(pws[charConverted])
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56 | size -= charConverted
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57 | Loop Until pws = pwsEnd
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58 | buf.Length = 0
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59 | End Sub
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60 |
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61 | Protected
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62 | Override Sub Dispose(disposing As Boolean)
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63 | If disposing Then
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64 | Flush()
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65 | flushLast()
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66 | s.Dispose()
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67 | End If
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68 | End Sub
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69 |
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70 | Private
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71 | Sub init(stream As Stream)
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72 | s = stream
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73 | buf = New Text.StringBuilder(4096)
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74 | '暫定。正式版ではUTF-8を標準とする。
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75 | encoding = New Text.Detail.WindowsCodePageEncoding(CP_ACP)
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76 | encoder = encoding.GetEncoder()
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77 | End Sub
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78 |
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79 | Sub flushLast()
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80 | Dim charConverted As Long
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81 | Dim byteBuf[63] As Byte
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82 | Dim byteSize As Long
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83 | Dim completed As Boolean
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84 | Do
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85 | encoder.Convert(0, 0, byteBuf, Len(byteBuf), False, charConverted, byteSize, completed)
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86 | s.Write(byteBuf, 0, byteSize)
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87 | Loop Until completed
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88 | End Sub
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89 |
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90 | encoding As Text.Encoding
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91 | encoder As Text.Encoder
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92 | s As System.IO.Stream
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93 | End Class
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94 |
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95 | End Namespace
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96 | End Namespace
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