Changeset 472
- Timestamp:
- Mar 12, 2008, 12:52:54 AM (17 years ago)
- File:
-
- 1 edited
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trunk/Include/Classes/System/IO/MemoryStream.ab
r445 r472 7 7 8 8 Public 9 /* 10 0に初期化される拡張可能な容量を使用して初期化 9 /*! 10 @brief MemoryStreamクラスの新しいインスタンスを初期化します。 11 @author NoWest 12 @date 2008/3/12 11 13 */ 12 14 Sub MemoryStream() 13 15 This.writable = True 14 This.Resizable = True 15 This.visible = False 16 This.handle = HeapCreate(0,0,0) 17 This.p = HeapAlloc(This.handle,HEAP_ZERO_MEMORY,0) 18 This.StreamLength = 0 19 This.CurrentPosition = 0 20 End Sub 16 This.resizable = True 17 This.visible = False 18 This.create() 19 This.pointer = This.allocate(0) 20 This.streamLength = 0 21 This.currentPosition = 0 22 End Sub 23 24 /*! 25 @brief MemoryStreamクラスの新しいインスタンスを初期容量を指定して初期化します。 26 @author NoWest 27 @date 2008/3/12 28 */ 21 29 Sub MemoryStream(capacity As Long) 22 30 This.writable = True 23 This.Resizable = True 24 This.visible = False 25 This.handle = HeapCreate(0,0,0) 26 This.p = HeapAlloc(This.handle,HEAP_ZERO_MEMORY,capacity) 27 This.StreamLength = capacity 28 This.CurrentPosition = 0 29 End Sub 31 This.resizable = True 32 This.visible = False 33 This.create() 34 This.pointer = This.allocate(capacity) 35 This.streamLength = capacity 36 This.currentPosition = 0 37 End Sub 38 39 /*! 40 @brief MemoryStreamクラスの新しいインスタンスを指定したバッファに基づいて初期化します。容量を変更することはできません。 41 @author NoWest 42 @date 2008/3/12 43 */ 30 44 Sub MemoryStream(buffer As *Byte, length As Long) 31 45 This.writable = True 32 This.Resizable = False 33 This.visible = False 34 This.handle = HeapCreate(0,0,0) 35 This.p = HeapAlloc(This.handle,HEAP_ZERO_MEMORY,length) 36 MoveMemory(This.p,buffer,length) 37 This.StreamLength = length 38 This.CurrentPosition = 0 39 End Sub 46 This.resizable = False 47 This.visible = False 48 This.create() 49 This.pointer = This.allocate(length) 50 MoveMemory(This.pointer,buffer,length) 51 This.streamLength = length 52 This.currentPosition = 0 53 End Sub 54 55 /*! 56 @brief MemoryStreamクラスの新しいインスタンスを指定したバッファに基づいて初期化します。容量を変更することはできません。また、書き込みをサポートするかどうかも指定できます。 57 @author NoWest 58 @date 2008/3/12 59 */ 40 60 Sub MemoryStream(buffer As *Byte, length As Long, writable As Boolean) 41 61 This.writable = writable 42 This.Resizable = False 43 This.visible = False 44 This.handle = HeapCreate(0,0,0) 45 This.p = HeapAlloc(This.handle,HEAP_ZERO_MEMORY,length) 46 MoveMemory(This.p,buffer,length) 47 This.StreamLength = length 48 This.CurrentPosition = 0 49 End Sub 62 This.resizable = False 63 This.visible = False 64 This.create() 65 This.pointer = This.allocate(length) 66 MoveMemory(This.pointer,buffer,length) 67 This.streamLength = length 68 This.currentPosition = 0 69 End Sub 70 71 /*! 72 @brief MemoryStreamクラスの新しいインスタンスを指定したバッファの指定された領域に基づいて初期化します。容量を変更することはできません。 73 @author NoWest 74 @date 2008/3/12 75 */ 50 76 Sub MemoryStream(buffer As *Byte, index As Long, count As Long) 51 77 This.writable = True 52 This.Resizable = False 53 This.visible = False 54 This.handle = HeapCreate(0,0,0) 55 This.p = HeapAlloc(This.handle,HEAP_ZERO_MEMORY,count) 56 MoveMemory(This.p,VarPtr(buffer[index]),count) 57 This.StreamLength = count 58 This.CurrentPosition = 0 59 End Sub 78 This.resizable = False 79 This.visible = False 80 This.create() 81 This.pointer = This.allocate(count) 82 MoveMemory(This.pointer,VarPtr(buffer[index]),count) 83 This.streamLength = count 84 This.currentPosition = 0 85 End Sub 86 87 /*! 88 @brief MemoryStreamクラスの新しいインスタンスを指定したバッファの指定された領域に基づいて初期化します。容量を変更することはできません。また、書き込みをサポートするかどうかを指定できます。 89 @author NoWest 90 @date 2008/3/12 91 */ 60 92 Sub MemoryStream(buffer As *Byte, index As Long, count As Long, writable As Boolean) 61 93 This.writable = writable 62 This.Resizable = False 63 This.visible = False 64 This.handle = HeapCreate(0,0,0) 65 This.p = HeapAlloc(This.handle,HEAP_ZERO_MEMORY,count) 66 MoveMemory(This.p,VarPtr(buffer[index]),count) 67 This.StreamLength = count 68 This.CurrentPosition = 0 69 End Sub 94 This.resizable = False 95 This.visible = False 96 This.create() 97 This.pointer = This.allocate(count) 98 MoveMemory(This.pointer,VarPtr(buffer[index]),count) 99 This.streamLength = count 100 This.currentPosition = 0 101 End Sub 102 103 /*! 104 @brief MemoryStreamクラスの新しいインスタンスを指定したバッファの指定された領域に基づいて初期化します。容量を変更することはできません。また、書き込みをサポートするかどうかを指定できます。GetBufferメソッドをサポートするかどうかを指定できます。 105 @author NoWest 106 @date 2008/3/12 107 */ 70 108 Sub MemoryStream(buffer As *Byte, index As Long, count As Long, writable As Boolean, visible As Boolean) 71 109 This.writable = writable 72 This. Resizable = False110 This.resizable = False 73 111 This.visible = visible 74 This.handle = HeapCreate(0,0,0) 75 This.p = HeapAlloc(This.handle,HEAP_ZERO_MEMORY,count) 76 MoveMemory(This.p,VarPtr(buffer[index]),count) 77 This.StreamLength = count 78 This.CurrentPosition = 0 79 End Sub 112 This.create() 113 This.pointer = This.allocate(count) 114 MoveMemory(This.pointer,VarPtr(buffer[index]),count) 115 This.streamLength = count 116 This.currentPosition = 0 117 End Sub 118 119 /*! 120 @brief MemoryStreamクラスのデストラクタです。 121 @author NoWest 122 @date 2008/3/12 123 */ 80 124 Sub ~MemoryStream() 81 125 This.Close() … … 83 127 84 128 Public 129 /*! 130 @brief ストリームが読み取りをサポートしているかどうかを示す値を取得します。 131 @author NoWest 132 @date 2008/3/12 133 */ 85 134 Override Function CanRead() As Boolean 86 If This.p Then135 If This.pointer Then 87 136 Return True 88 137 Else … … 91 140 End Function 92 141 142 /*! 143 @brief ストリームがシークをサポートしているかどうかを示す値を取得します。 144 @author NoWest 145 @date 2008/3/12 146 */ 93 147 Override Function CanSeek() As Boolean 94 If This.p Then148 If This.pointer Then 95 149 Return True 96 150 Else … … 99 153 End Function 100 154 155 /*! 156 @brief ストリームが書き込みをサポートしているかどうかを示す値を取得します。 157 @author NoWest 158 @date 2008/3/12 159 */ 101 160 Override Function CanWrite() As Boolean 102 If This.p Then161 If This.pointer Then 103 162 Return This.writable 104 163 Else … … 107 166 End Function 108 167 109 /* 110 メモリの容量であってストリームの長さではない 111 メモリはヒープからブロック単位で確保されるので 112 指定したストリーム長より大きくなることがある 113 また、配列として扱う場合の配列長となる 168 /*! 169 @brief ストリームに割り当てるメモリ容量をバイト単位で設定します。 170 @author NoWest 171 @date 2008/3/12 172 */ 173 Virtual Sub Capacity(value As Long) 174 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 175 If value < 0 Then Throw New ArgumentOutOfRangeException("MemoryStream.Capacity: A capacity is set to negative value.", New System.Int64(value),"Capacity") 176 If value < This.streamLength Then Throw New ArgumentOutOfRangeException("MemoryStream.Capacity: A capacity is less than the current length of the stream.",New System.Int64(value),"Capacity") 177 This.pointer = This.reallocate(This.pointer,value) 178 End Sub 179 180 /*! 181 @brief ストリームに割り当てられたメモリ容量をバイト単位で取得します。 182 @author NoWest 183 @date 2008/3/12 114 184 */ 115 185 Virtual Function Capacity() As Long 116 If This.p = 0 Then Debug'Throw New ObjectDisposedException 117 Return HeapSize(This.handle,0,This.p) 118 End Function 119 120 Virtual Sub Capacity(value As Long) 121 If This.p = 0 Then Debug'Throw New ObjectDisposedException 122 If value < 0 Then Debug'Throw New ArgumentOutOfRangeException 123 If value < This.StreamLength Then Debug'Throw New ArgumentOutOfRangeException 124 This.p = HeapReAlloc(This.handle,HEAP_ZERO_MEMORY,This.p,value) 125 End Sub 126 127 /* 128 こちらは容量とは別のストリーム長 129 実際のデータの長さはこちら 186 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 187 Return This.size(This.pointer) 188 End Function 189 190 /*! 191 @brief ストリームの長さをバイト単位で取得します。Capacityプロパティの値より小さい場合があります。 192 @author NoWest 193 @date 2008/3/12 130 194 */ 131 195 Override Function Length() As Int64 132 If This.p = 0 Then Debug'Throw New ObjectDisposedException 133 Return This.StreamLength 134 End Function 135 136 /* 137 ストリームの現在位置を取得または設定 196 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 197 Return This.streamLength 198 End Function 199 200 /*! 201 @brief ストリームの現在位置を設定します。 202 @author NoWest 203 @date 2008/3/12 138 204 */ 139 205 Override Sub Position(value As Int64) 140 If This.p = 0 Then Debug'Throw New ObjectDisposedException 141 If value < 0 Then Debug'Throw New ArgumentOutOfRangeException 142 If value > Int32.MaxValue() Then Debug'Throw New ArgumentOutOfRangeException 143 This.CurrentPosition = value As Long 144 End Sub 145 206 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 207 If value < 0 Then Throw New ArgumentOutOfRangeException("MemoryStream.Position: The position is set to a negative value.", New System.Int64(value), "Position") 208 If value > Int32.MaxValue() Then Throw New ArgumentOutOfRangeException("MemoryStream.Position: The position is a value greater than MaxValue.", New System.Int64(value), "Position") 209 This.currentPosition = value As Long 210 End Sub 211 212 /*! 213 @brief ストリームの現在位置を取得します。 214 @author NoWest 215 @date 2008/3/12 216 */ 146 217 Override Function Position() As Int64 147 If This.p = 0 Then Debug'Throw New ObjectDisposedException148 Return This. CurrentPosition As Int64218 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 219 Return This.currentPosition As Int64 149 220 End Function 150 221 … … 157 228 End Function*/ 158 229 230 /*! 231 @brief ストリームから指定されたバイト数を読み取り、bufferに書き込みます。 232 @author NoWest 233 @date 2008/3/12 234 */ 159 235 Override Function Read(buffer As *Byte, offset As Long, count As Long) As Long 160 If This.p = 0 Then Debug'Throw New ObjectDisposedException161 If buffer = 0 Then Debug 'Throw New ArgumentNullException162 If offset < 0 Then Debug'Throw New ArgumentOutOfRangeException163 If count < 0 Then Debug'Throw New ArgumentOutOfRangeException164 If (This. StreamLength - (This.CurrentPosition + count)) < 0 Then165 count + = (This. StreamLength - (This.CurrentPosition + count))236 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 237 If buffer = 0 Then Throw New ArgumentNullException("FileStream.Read: An argument is a null value.", "buffer") 238 If offset < 0 Then Throw New ArgumentOutOfRangeException("MemoryStream.Read: An argument is a negative value.", New System.Int64(offset), "offset") 239 If count < 0 Then Throw New ArgumentOutOfRangeException("MemoryStream.Read: An argument is a negative value.", New System.Int64(count), "count") 240 If (This.streamLength - (This.currentPosition + count)) < 0 Then 241 count + = (This.streamLength - (This.currentPosition + count)) 166 242 ElseIf count < 1 Then 167 243 Return 0 168 244 End If 169 MoveMemory(VarPtr(buffer[offset]),VarPtr(This.p [This.CurrentPosition]),count)170 This. CurrentPosition + = count245 MoveMemory(VarPtr(buffer[offset]),VarPtr(This.pointer[This.currentPosition]),count) 246 This.currentPosition + = count 171 247 Return count 172 248 End Function 173 249 250 /*! 251 @brief ストリームから指定された1バイト読み取ります。 252 @author NoWest 253 @date 2008/3/12 254 */ 174 255 Override Function ReadByte() As Long 175 256 Dim b As Byte … … 182 263 End Function 183 264 265 /*! 266 @brief ストリーム内の位置を指定した値に設定します。 267 @author NoWest 268 @date 2008/3/12 269 */ 184 270 Override Function Seek(offset As Int64, origin As SeekOrigin) As Int64 185 If This.p = 0 Then Debug'Throw New ObjectDisposedException186 If offset > Int32.MaxValue() Then Debug'Throw New ArgumentOutOfRangeException271 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 272 If offset > Int32.MaxValue() Then Throw New ArgumentOutOfRangeException("MemoryStream.Seek: The offset is a value greater than MaxValue.", New System.Int64(offset), "offset") 187 273 Select Case origin 188 274 Case SeekOrigin.Begin 189 If offset < 0 Then Debug 'Throw New IOException190 This. CurrentPosition = offset As Long275 If offset < 0 Then Throw New IOException("MemoryStream.Seek: Seeking is attempted before the beginning of the stream.") 276 This.currentPosition = offset As Long 191 277 Case SeekOrigin.Current 192 278 Beep(440,10) 193 If (This. CurrentPosition + offset) < 0 Then Debug 'Throw New IOException194 This. CurrentPosition += offset As Long279 If (This.currentPosition + offset) < 0 Then Throw New IOException("MemoryStream.Seek: Seeking is attempted before the beginning of the stream.") 280 This.currentPosition += offset As Long 195 281 Case SeekOrigin.End 196 If (This. StreamLength + offset) < 0 Then Debug 'Throw New IOException197 This. CurrentPosition = (This.StreamLength + offset) As Long282 If (This.streamLength + offset) < 0 Then Throw New IOException("MemoryStream.Seek: Seeking is attempted before the beginning of the stream.") 283 This.currentPosition = (This.streamLength + offset) As Long 198 284 Case Else 199 Debug 'Throw New ArgumentException285 Throw New ArgumentException("MemoryStream.Seek: An argument is an invalid SeekOrigin","origin") 200 286 End Select 201 Return This.CurrentPosition As Int64 202 End Function 203 287 Return This.currentPosition As Int64 288 End Function 289 290 /*! 291 @brief ストリームの長さを設定します。メモリ容量を超えては設定できません。 292 @author NoWest 293 @date 2008/3/12 294 */ 204 295 Override Sub SetLength(value As Int64) 205 If This.p = 0 Then Debug'Throw New ObjectDisposedException 206 If This.writable = False Then Debug 'Throw New NotSupportedException 207 If This.Resizable = False Then Debug 'Throw New NotSupportedException 208 If value < 0 Then Debug'Throw New ArgumentOutOfRangeException 209 If value > Int32.MaxValue() Then Debug'Throw New ArgumentOutOfRangeException 210 This.p = HeapReAlloc(This.handle,HEAP_ZERO_MEMORY,This.p,value As Long) 211 This.StreamLength = value As Long 212 End Sub 213 296 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 297 If This.writable = False Then Throw New NotSupportedException("MemoryStream: The current stream is not writable") 298 If This.resizable = False Then Throw New NotSupportedException("MemoryStream: The current stream is not resizable") 299 If value > This.Capacity() Then Throw New NotSupportedException("MemoryStream.SetLength: This stream length is larger than the current capacity.") 300 If value < 0 Then Throw New ArgumentOutOfRangeException("MemoryStream.Read: An argument is a negative value.", New System.Int64(value), "value") 301 If value > Int32.MaxValue() Then Throw New ArgumentOutOfRangeException("MemoryStream.SetLength: The length is a value greater than MaxValue.", New System.Int64(value), "value") 302 This.pointer = This.reallocate(This.pointer,value As Long) 303 This.streamLength = value As Long 304 End Sub 305 306 /*! 307 @brief ストリームにbufferの内容を指定したバイト数書き込みます。 308 @author NoWest 309 @date 2008/3/12 310 */ 214 311 Override Sub Write(buffer As *Byte, offset As Long, count As Long) 215 If This.p = 0 Then Debug'Throw New ObjectDisposedException 216 If This.writable = False Then Debug'Throw New NotSupportedException 217 If buffer = 0 Then Debug 'Throw New ArgumentNullException 218 If offset < 0 Then Debug'Throw New ArgumentOutOfRangeException 219 If count < 0 Then Debug'Throw New ArgumentOutOfRangeException 220 If count > (This.StreamLength - This.CurrentPosition) Then 221 If This.Resizable = False Then 222 Debug 'Throw New NotSupportedException 223 Else 224 If count > (This.Capacity() - This.CurrentPosition) Then 225 This.p = HeapReAlloc(This.handle,HEAP_ZERO_MEMORY,This.p,This.CurrentPosition+count) 226 End If 227 This.StreamLength = This.CurrentPosition+count 312 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 313 If This.writable = False Then Throw New NotSupportedException("MemoryStream: The current stream is not writable") 314 If buffer = 0 Then Throw New ArgumentNullException("MemoryStream.Write: An argument is a null value.", "buffer") 315 If offset < 0 Then Throw New ArgumentOutOfRangeException("MemoryStream.Write: An argument is a negative value.", New System.Int64(offset), "offset") 316 If count < 0 Then Throw New ArgumentOutOfRangeException("MemoryStream.Write: An argument is a negative value.", New System.Int64(count), "count") 317 If count > (This.streamLength - This.currentPosition) Then 318 If This.resizable = False Then Throw New NotSupportedException("MemoryStream: The current stream is not resizable") 319 If (This.Capacity() - This.currentPosition) < count Then 320 This.pointer = This.reallocate(This.pointer,This.currentPosition+count) 228 321 End If 229 End If 230 MoveMemory(VarPtr(This.p[This.CurrentPosition]),VarPtr(buffer[offset]),count) 231 This.CurrentPosition + = count 232 End Sub 233 322 This.streamLength = This.currentPosition+count 323 End If 324 MoveMemory(VarPtr(This.pointer[This.currentPosition]),VarPtr(buffer[offset]),count) 325 This.currentPosition + = count 326 End Sub 327 328 /*! 329 @brief ストリームに1バイト書き込みます。 330 @author NoWest 331 @date 2008/3/12 332 */ 234 333 Override Sub WriteByte(b As Byte) 235 334 Write(VarPtr(b), 0, 1) 236 335 End Sub 237 336 238 /* Virtual Function ToArray() As List<Byte>337 /* Virtual Function ToArray() As Array<Byte> 239 338 TODO: 240 339 End Function*/ 241 340 341 /*! 342 @brief ストリームの内容全体をまるごと別のストリームに書き込みます。 343 @author NoWest 344 @date 2008/3/12 345 */ 242 346 Virtual Sub WriteTo(stream As Stream) 243 If This.p = 0 Then Debug'Throw New ObjectDisposedException244 If ActiveBasic.IsNothing(stream) Then Debug 'Throw New ArgumentNullException("path")245 stream.Write(This.p ,0,This.Capacity())347 If This.pointer = 0 Then Throw New ObjectDisposedException("MemoryStream: This stream has closed.") 348 If ActiveBasic.IsNothing(stream) Then Throw New ArgumentNullException("MemoryStream.WriteTo: An argument is a null value.", "stream") 349 stream.Write(This.pointer,0,This.Capacity()) 246 350 End Sub 247 351 248 352 Protected 353 354 /*! 355 @brief Streamクラスから継承 356 @author NoWest 357 @date 2008/3/12 358 */ 249 359 Override Sub Dispose(disposing As Boolean) 250 HeapFree(This.handle,0,InterlockedExchangePointer(ByVal VarPtr(This.p) As VoidPtr,NULL) As VoidPtr) 360 This.destroy() 361 End Sub 362 363 Private 364 /* Heap memory address */ 365 pointer As *Byte 366 /* MemoryStream status */ 367 writable As Boolean 368 resizable As Boolean 369 visible As Boolean 370 streamLength As Long 371 currentPosition As Long 372 373 /* 374 バッファ管理用のPrivate関数類 375 一応初期設定ではGC_mallocでメモリを確保しています。 376 */ 377 handle As HANDLE 378 Sub create() 379 #ifdef NOT_USE_GC 380 This.handle = HeapCreate(0,0,0) 381 #endif 382 End Sub 383 384 Sub destroy() 385 #ifdef NOT_USE_GC 386 HeapFree(This.handle,0,InterlockedExchangePointer(ByVal VarPtr(This.pointer) As VoidPtr,NULL) As VoidPtr) 251 387 HeapDestroy(InterlockedExchangePointer(ByVal VarPtr(This.handle) As VoidPtr,NULL) As HANDLE) 252 End Sub 253 254 /* status */ 255 writable As Boolean 256 Resizable As Boolean 257 visible As Boolean 258 259 StreamLength As Long 260 CurrentPosition As Long 261 262 Private 263 handle As HANDLE 264 p As *Byte 388 #endif 389 End Sub 390 391 Function allocate(length As SIZE_T) As VoidPtr 392 #ifdef NOT_USE_GC 393 Return HeapAlloc(This.handle,HEAP_ZERO_MEMORY,length) 394 #else 395 Return GC_malloc_atomic(length) 396 #endif 397 End Function 398 399 Function reallocate(p As VoidPtr, length As SIZE_T) As VoidPtr 400 #ifdef NOT_USE_GC 401 Return HeapReAlloc(This.handle,HEAP_ZERO_MEMORY,p,This.currentPosition+count) 402 #else 403 Return _System_pGC->__realloc(p,length) 404 #endif 405 End Function 406 407 Function size(p As VoidPtr) As Long 408 #ifdef NOT_USE_GC 409 Return HeapSize(This.handle,0,p) 410 #else 411 Dim pmemobj = _System_pGC->GetMemoryObjectPtr(p) 412 Return pmemobj->size 413 #endif 414 End Function 265 415 End Class 266 416
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