| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// @assertion |
| /// ByteData.view( |
| /// ByteBuffer buffer, [ |
| /// int offsetInBytes = 0, int length |
| /// ]) |
| /// Creates an [ByteData] view of the specified region in buffer. |
| /// @description Checks that a new instance has the same elements as |
| /// the specified region. |
| /// @author msyabro |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(List<int> array, int offset, int length) { |
| var tmp = new Uint8List.fromList(array); |
| var byteBuffer = tmp.buffer; |
| |
| ByteData l = new ByteData.view(byteBuffer, offset, length); |
| Expect.equals(length, l.lengthInBytes); |
| for (int i = 0; i < l.lengthInBytes; ++i) { |
| Expect.equals(tmp[offset ~/ Uint8List.bytesPerElement + i], l.getUint8(i)); |
| } |
| } |
| |
| main() { |
| check([], 0, 0); |
| check([1], 0, 1); |
| check([127, 128], 0, 2); |
| check([1000, 1000, 1000], 0, 3); |
| check([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17], 0, 18); |
| check([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17], 5, 13); |
| check([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17], 17, 1); |
| } |