| // Copyright (c) 2016, 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 int toUnsigned(int width) |
| * Returns the least significant width bits of this integer as a non-negative |
| * number (i.e. unsigned representation). The returned value has zeros in all |
| * bit positions higher than width. |
| * |
| * (-1).toUnsigned(5) == 31 // 11111111 -> 00011111 |
| * ... |
| * @description Checks that this method returns the least significant width bits |
| * of this integer as a non-negative number |
| * @author sgrekhov@unipro.ru |
| */ |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| Expect.equals(1, (-1).toUnsigned(1)); // 11111111 -> 00000001 |
| Expect.equals(3, (-1).toUnsigned(2)); // 11111111 -> 00000011 |
| Expect.equals(7, (-1).toUnsigned(3)); // 11111111 -> 00000111 |
| Expect.equals(15, (-1).toUnsigned(4)); // 11111111 -> 00001111 |
| Expect.equals(31, (-1).toUnsigned(5)); // 11111111 -> 00011111 |
| Expect.equals(63, (-1).toUnsigned(6)); // 11111111 -> 00111111 |
| Expect.equals(127, (-1).toUnsigned(7)); // 11111111 -> 01111111 |
| Expect.equals(255, (-1).toUnsigned(8)); // 11111111 -> 11111111 |
| } |
