| // 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 |
| /// Float64List.view( |
| /// ByteBuffer buffer, [ |
| /// int byteOffset = 0, |
| /// int length |
| /// ]) |
| /// Creates an [Float64List] 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"; |
| |
| check(List<double> array, int offset, int length) { |
| var tmp = new Float64List.fromList(array); |
| var byteBuffer = tmp.buffer; |
| var l = new Float64List.view(byteBuffer, offset, length); |
| Expect.equals(length, l.length); |
| for (int i = 0; i < l.length; ++i) { |
| Expect.equals(tmp[offset ~/ Float64List.bytesPerElement + i], l[i]); |
| } |
| } |
| |
| main() { |
| check([], 0, 0); |
| check([1.0], 0, 1); |
| check([1.7976931348623157e308, 4.9e-324], 0, 2); |
| check([1000.0, 1000.0, 1000.0], 0, 3); |
| check([ |
| 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, |
| 14.0, 15.0, 16.0, 17.0 |
| ], 0, 18); |
| check([ |
| 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, |
| 14.0, 15.0, 16.0, 17.0 |
| ], 40, 13); |
| check([ |
| 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, |
| 14.0, 15.0, 16.0, 17.0 |
| ], 136, 1); |
| } |