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), Nothing)
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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, Nothing)
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31 | End Sub
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32 |
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33 | /*
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34 | @date 2009/02/16
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35 | @auther Egtra
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36 | */
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37 | Sub StreamWriter(stream As Stream, encoding As Text.Encoding)
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38 | init(stream, encoding)
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39 | End Sub
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40 |
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41 | /*
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42 | @brief 基になるストリームを取得する
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43 | @date 2008/09/02
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44 | @auther NoWest
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45 | */
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46 | Function BaseStream () As System.IO.Stream
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47 | Return s
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48 | End Function
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49 |
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50 | Override Sub Flush()
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51 | Flush(False)
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52 | End Sub
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53 |
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54 | Sub Flush(last As Boolean)
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55 | #ifdef UNICODE
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56 | encoder.Encode(StrPtr(buf), buf.Length As SIZE_T, s, last)
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57 | buf.Remove(0, buf.Length)
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58 | #else
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59 | Dim p = StrPtr(buf)
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60 | Dim i = 0 As SIZE_T
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61 | Dim mbLen = 0 As SIZE_T
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62 | While i <= buf.Length
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63 | mbLen = i
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64 | 'ヌル文字で終わっていないので、CharNextは使えない
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65 | If IsDBCSLeadByte(p[i]) Then
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66 | i += 2
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67 | Else
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68 | i += 1
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69 | End If
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70 | Wend
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71 | Dim wcBuf As PCWSTR
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72 | Dim wcLen = GetStr(p, mbLen, wcBuf)
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73 | encoder.Encode(wcBuf, wcLen, s, last)
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74 | buf.Remove(0, mbLen)
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75 | If last Then
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76 | If buf.Length <> 0 Then
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77 | s.WriteByte(Asc("?"))
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78 | buf.Length = 0
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79 | End If
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80 | End If
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81 | #endif
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82 | End Sub
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83 |
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84 | Protected
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85 | Override Sub Dispose(disposing As Boolean)
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86 | If disposing Then
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87 | Flush(True)
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88 | s.Dispose()
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89 | End If
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90 | End Sub
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91 |
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92 | Private
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93 | Sub init(stream As Stream, e As Text.Encoding)
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94 | s = stream
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95 | buf = New Text.StringBuilder(4096)
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96 | If ActiveBasic.IsNothing(e) Then
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97 | '暫定。正式版ではUTF-8を標準とする。
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98 | encoder = New Text.Detail.WindowsCodePageEncoder(CP_ACP)
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99 | Else
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100 | encoder = e.GetEncoder()
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101 | End If
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102 | End Sub
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103 |
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104 | encoder As Text.Encoder
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105 | s As System.IO.Stream
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106 | End Class
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107 |
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108 | End Namespace
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109 | End Namespace
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