Index: /Include/Classes/System/IO/FileStream.ab
===================================================================
--- /Include/Classes/System/IO/FileStream.ab	(revision 255)
+++ /Include/Classes/System/IO/FileStream.ab	(revision 256)
@@ -1,3 +1,385 @@
+
+/* 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 */
+Enum FileOptions
+	Asynchronous
+	DeleteOnClose
+	Encrypted
+	None
+	RandomAccess
+	SequentialScan
+	WriteThrough 
+End Enum
+
 Class FileStream
-	' TODO: 実装
+	Inherits Stream
+
+	handle As HANDLE
+
+	/*
+	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
+	今のところは不明なので自前で実装するしかない
+	*/
+	filePath As String
+	fileMode As DWord
+	fileAccess As DWord
+	fileShare As DWord
+	fileOptions As DWord
+
+	/* 現在は未使用 */
+	/*Overlapped As OVERLAPPED*/
+
+Public
+	/* 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 */
+	Sub FileStream(path As String, mode As FileMode, access As FileAccess, share As FileShare, options As FileOptions)
+		Dim acc As DWord
+		Dim mod As DWord
+		Dim sha As DWord
+		Dim opt As DWord
+
+		Select Case access
+			Case FileAccess.Read
+				acc=GENERIC_READ
+			Case FileAccess.ReadWrite
+				acc=GENERIC_READ or GENERIC_WRITE
+			Case FileAccess.Write
+				acc=GENERIC_WRITE
+		End Select
+
+		Select Case share
+			Case FileShare.DeleteFile
+				sha=FILE_SHARE_DELETE
+			Case FileShare.None
+				sha=0
+			Case FileShare.Read
+				sha=FILE_SHARE_READ
+			Case FileShare.ReadWrite
+				sha=FILE_SHARE_READ or FILE_SHARE_WRITE
+			Case Write
+				sha=FILE_SHARE_WRITE
+		End Select
+
+		Select Case mode
+			Case FileMode.Append
+				mo=OPEN_ALWAYS
+			Case FileMode.Create
+				mo=CREATE_ALWAYS
+			Case FileMode.CreateNew
+				mo=CREATE_NEW
+			Case FileMode.Open
+				mo=OPEN_EXISTING
+			Case FileMode.OpenOrCreate
+				mo=OPEN_ALWAYS
+			Case FileMode.Truncate
+				mo=TRUNCATE_EXISTING
+		End Select
+
+		Select Case options
+			Case FileOption.Asynchronous
+				opt=FILE_FLAG_OVERLAPPED
+			Case FileOptions.DeleteOnClose
+				opt=FILE_FLAG_DELETE_ON_CLOSE
+			Case FileOptions.Encrypted
+			Case FileOptions.None
+				opt=0
+			Case FileOptions.RandomAccess
+				opt=FILE_FLAG_RANDOM_ACCESS
+			Case FileOptions.SequentialScan
+				opt=FILE_FLAG_SEQUENTIAL_SCAN
+			Case FileOptions.WriteThrough
+				opt=FILE_FLAG_WRITE_THROUGH
+		End Select
+
+		This.handle=CreateFile(path.Chars As PSTR,acc,sha,ByVal NULL,mo,opt,0)
+		If This.handle=HANDLE_INVALIDATE Then
+		'エラー処理
+		'Throw ArgumentException
+		'Throw IOException
+		'Throw System.IO.FileNotFoundException 
+			Exit Sub
+		End If
+
+		fileMode = mod
+		fileAccess = acc
+		fileShare = sha
+		fileOptions = opt
+	End Sub
+	Sub FileStream(path As String, mode As FileMode)
+		Dim acc As DWord
+		Dim mo As DWord
+		Select Case mode
+			Case FileMode.Append
+				acc=GENERIC_WRITE
+				mo=OPEN_ALWAYS
+'				OutputDebugString(Ex"append\n")
+			Case FileMode.Create
+				acc=GENERIC_READ or GENERIC_WRITE
+				mo=CREATE_ALWAYS
+'				OutputDebugString(Ex"create\n")
+			Case FileMode.CreateNew
+				acc=GENERIC_READ or GENERIC_WRITE
+				mo=CREATE_NEW
+'				OutputDebugString(Ex"create new\n")
+			Case FileMode.Open
+				acc=GENERIC_READ or GENERIC_WRITE
+				mo=OPEN_EXISTING
+'				OutputDebugString(Ex"open\n")
+			Case FileMode.OpenOrCreate
+				acc=GENERIC_READ or GENERIC_WRITE
+				mo=OPEN_ALWAYS
+'				OutputDebugString(Ex"open or create\n")
+			Case FileMode.Truncate
+				acc=GENERIC_WRITE
+				mo=TRUNCATE_EXISTING
+'				OutputDebugString(Ex"truncate\n")
+		End Select
+
+		'ファイルを作成または開く
+		This.handle=CreateFile(path.Chars As PSTR,acc,0,ByVal NULL,mo,0,0)
+
+		'エラー処理
+		'Throw ArgumentException
+		'Throw IOException
+		'Throw System.IO.FileNotFoundException 
+
+
+		'ファイルを作成または開いた後の処理
+		If mode=FileMode.Append Then
+			SetFilePointer(This.handle,0,NULL,FILE_END)
+		End If
+	End Sub
+
+	Sub ~FileStream()
+		This.Flush()
+		This.Close()
+	End Sub
+
+Public
+	Override Function CanRead() As Boolean
+		/* ファイルが読み込みに対応しているかを返す */
+		If fileAccess=GENERIC_READ/*FileAccess.Read*/ or fileAccess=GENERIC_READ or GENERIC_WRITE/*FileAccess.ReadWrite*/ Then
+			Return True
+		Else
+			Return False
+		End If
+	End Function
+
+	Override Function CanSeek() As Boolean
+		/* ファイルがシークに対応しているかを返す */
+		Return True
+	End Function
+
+	Override Function CanTimeout() As Boolean
+		/* ファイルがタイムアウトに対応しているかを返す */
+		Return False /*今のところ対応していないのでFalse*/
+	End Function
+
+	Override Function CanWrite() As Boolean
+		/* ファイルが書き込みに対応しているかを返す */
+		If fileAccess=GENERIC_WRITE/*FileAccess.Write*/ or fileAccess=GENERIC_READ or GENERIC_WRITE/*FileAccess.ReadWrite*/ Then
+			Return True
+		Else
+			Return False
+		End If
+	End Function
+
+	/*Handle*/
+
+	Function IsAsync() As Boolean
+		/* ファイルが非同期操作に対応しているかを返す */
+		If fileOptions=FILE_FLAG_OVERLAPPED/*FileOptions.Asynchronous*/ Then
+			Return True
+		Else
+			Return False
+		End If
+	End Function
+
+	Override Function Length() As Int64
+		/* ファイルのサイズの取得 */
+		Dim s As LARGE_INTEGER
+		s.LowPart=GetFileSize(This.handle,VarPtr(s.HighPart) As *DWord)
+		memcpy(VarPtr(Length),VarPtr(s),SizeOf(LARGE_INTEGER))
+	End Function
+
+	Function Name() As String
+		/* 多分文字列をコピーして返す方がいいのと思うが。。。*/
+		Return filePath
+	End Function
+	
+	Override Sub Position(value As Int64)
+		/* ファイルポインタの位置の設定 */
+		Dim o As LARGE_INTEGER
+		memcpy(VarPtr(o),VarPtr(value),SizeOf(LARGE_INTEGER))
+		If o.HighPart=0 And value<0 Then
+			o.LowPart=-Abs(o.LowPart) As Long
+		End If
+		Dim ret As LARGE_INTEGER
+		SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_CURRENT)
+	End Sub
+	Override Function Position() As Int64
+		/* ファイルポインタの位置の取得 */
+		Dim o As LARGE_INTEGER
+		o.HighPart=0
+		o.LowPart=0
+		o.LowPart=SetFilePointer(This.handle,0,VarPtr(o.HighPart) As *DWord,FILE_CURRENT)
+		memcpy(VarPtr(Position),VarPtr(o),SizeOf(LARGE_INTEGER))
+	End Function
+
+	Override Sub ReadTimeout(value As Long)
+		'TODO
+	End Sub
+	Override Function ReadTimeout() As Long
+		'TODO
+	End Function
+
+	/* Safe～Handle系の実装は要相談！！ */
+/*	Function SafeFileHandle() As SafeFileHandle
+	End Function*/
+
+	Override Sub WriteTimeout(value As Long)
+		'TODO
+	End Sub
+	Override Function WriteTimeout() As Long
+		'TODO
+	End Function
+	
+
+Public
+	Override Function BeginRead(ByRef buffer[] As Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As IAsyncResult
+		'TODO
+	End Function
+
+	Override Function BeginWrite(ByRef buffer[] As Byte, offset As Long, count As Long, callback As AsyncCallback, state As Object) As IAsyncResult
+		'TODO
+	End Function
+
+	Override Sub Close()
+		CloseHandle(This.handle)
+	End Sub
+
+/*	CreateObjRef*/
+/*	Dispose*/
+
+	Override Sub EndRead(ByRef asyncResult As IAsyncResult)
+		'TODO
+	End Sub
+
+	Override Sub EndWrite(ByRef asyncResult As IAsyncResult)
+		'TODO
+	End Sub
+
+/*	Equals*/
+
+	Override Sub Flush()
+		FlushFileBuffers(This.handle)
+	End Sub
+
+/*	Function GetAccessControl() As FileSecurity
+	FileSecurityの実装がまだできてない。
+	End Function*/
+
+	Override Function GetHashCode() As Long
+		Return ObjPtr(This) As Long
+	End Function
+
+/*	GetLifetimeService*/
+
+/*	Override Function GetType() As TypeInfo
+		Return Super.GetType()
+	End Function*/
+
+/*	InitializeLifetimeService*/
+
+	Sub Lock(position As Int64, length As Int64)
+		Dim p As LARGE_INTEGER
+		Dim l As LARGE_INTEGER
+		memcpy(VarPtr(p),VarPtr(position),SizeOf(LARGE_INTEGER))
+		memcpy(VarPtr(l),VarPtr(length),SizeOf(LARGE_INTEGER))
+		LockFile(This.handle,p.LowPart,p.HighPart,l.LowPart,l.HighPart)
+	End Sub
+
+	Override Function Read(ByRef buffer[] As Byte, offset As Long, count As Long) As Long
+		If offset Then
+			SetFilePointer(This.handle,offset,NULL,FILE_CURRENT)
+		End If
+		ReadFile(This.handle,buffer,count,VarPtr(Read) As *DWord,ByVal NULL)
+	End Function
+
+	Override Function ReadByte() As Long
+		Dim b As Byte
+		Dim ret = Read(b, 0, 1)
+		If ret <> 0 Then
+			Return b As Long
+		Else
+			Return -1
+		End If
+	End Function
+/*	ReferenceEquals*/
+
+	Override Function Seek(offset As Int64, origin As SeekOrigin) As Long
+		Dim o As LARGE_INTEGER
+		memcpy(VarPtr(o),VarPtr(offset),SizeOf(LARGE_INTEGER))
+		If o.HighPart=0 And offset<0 Then
+			o.LowPart=-o.LowPart
+		End If
+		Select Case origin
+			Case SeekOrigin.Begin
+				SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_BEGIN)
+			Case SeekOrigin.Current
+				SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_CURRENT)
+			Case SeekOrigin.End
+				SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_END)
+		End Select
+	End Function
+
+/*	Sub SetAccessControl(fileSecurity As FileSecurity)
+	FileSecurityの実装がまだできてない。
+	End Sub*/
+
+	Override Sub SetLength(value As Int64)
+		Dim o As LARGE_INTEGER
+		memcpy(VarPtr(o),VarPtr(value),SizeOf(LARGE_INTEGER))
+		If o.HighPart=0 And value<0 Then
+			o.LowPart=-o.LowPart
+		End If
+		If Length()=>value Then
+			SetFilePointer(This.handle,o.LowPart,VarPtr(o.HighPart) As *DWord,FILE_BEGIN)
+			SetEndOfFile(This.handle)
+		End If
+	End Sub
+
+/*	Synchronized*/
+
+	Override Function ToString() As String
+		Return Name()
+	End Function
+
+	Sub Unlock(position As Int64, length As Int64)
+		Dim p As LARGE_INTEGER
+		Dim l As LARGE_INTEGER
+		memcpy(VarPtr(p),VarPtr(position),SizeOf(LARGE_INTEGER))
+		memcpy(VarPtr(l),VarPtr(length),SizeOf(LARGE_INTEGER))
+		UnlockFile(This.handle,p.LowPart,p.HighPart,l.LowPart,l.HighPart)
+	End Sub
+
+	Override Sub Write(ByRef buffer[] As Byte, offset As Long, count As Long)
+		If offset Then
+			SetFilePointer(This.handle,offset,NULL,FILE_CURRENT)
+		End If
+		Dim ret As DWord
+		WriteFile(This.handle,buffer,count,VarPtr(ret),ByVal NULL)
+	End Sub
+
+	Override Sub WriteByte(b As Byte)
+		Write(b, 0, 1)
+	End Sub
+
+Protected
+	/*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*/
+	Override Function CreateWaitHandle() As WaitHandle
+'		Return Nothing
+	End Function
+
+/*	Dispose
+	Finalize
+	MemberwiseClone*/
 End Class