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76 lines
2.1 KiB
76 lines
2.1 KiB
Imports System.IO
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Imports Microsoft.VisualBasic.Net.Protocols
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Imports Microsoft.VisualBasic.Net.Protocols.Reflection
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Imports Microsoft.VisualBasic.Serialization
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Namespace FileSystem.Protocols
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Public Class FileStreamInfo : Inherits FileHandle
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Public Property CanRead As Boolean
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Public Property CanSeek As Boolean
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Public Property CanWrite As Boolean
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Public Property FileHandle As IntPtr
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Public Property IsAsync As Boolean
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Sub New()
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End Sub
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Public Shared Function GetInfo(file As FileStream) As FileStreamInfo
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#Disable Warning
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Dim handle As New FileStreamInfo With {
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.HashCode = file.GetHashCode,
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.CanRead = file.CanRead,
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.CanSeek = file.CanSeek,
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.CanWrite = file.CanWrite,
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.FileHandle = file.Handle,
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.IsAsync = file.IsAsync
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} ' 可能会出现重复的文件名，所以使用这个句柄对象来进行唯一标示
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#Enable Warning
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Return handle
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End Function
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End Class
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Public Class SeekArgs : Inherits FileHandle
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Public Property offset As Long
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Public Property origin As Integer
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Sub New(handle As FileHandle)
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Call MyBase.New(handle)
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End Sub
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Sub New()
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End Sub
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Public Function Seek(stream As System.IO.FileStream) As Long
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Dim ori As SeekOrigin = CType(origin, SeekOrigin)
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Return stream.Seek(offset, ori)
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End Function
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End Class
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Public Class LockArgs : Inherits FileHandle
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Public Property Lock As Boolean
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Public Property position As Long
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Public Property length As Long
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Sub New(handle As FileHandle)
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Call MyBase.New(handle)
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End Sub
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Sub New()
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End Sub
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Public Sub LockOrNot(stream As System.IO.FileStream)
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If Lock Then
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Call stream.Lock(position, length)
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Else
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Call stream.Unlock(position, length)
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End If
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End Sub
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End Class
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End Namespace |