| /* |
| * Copyright (c) 2017, 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 asFloat64List([int offsetInBytes = 0, int length ]) |
| * Creates a Float64List view of a region of this byte buffer. |
| * ... |
| * The start index and length must describe a valid 64-bit aligned range of the |
| * buffer: |
| * - offsetInBytes must not be negative, |
| * - offsetInBytes must be divisible by eight, |
| * - length must not be negative, and |
| * - offsetInBytes + length * 8 must not be greater than lengthInBytes. |
| |
| * @description Checks that creating Float64List view with negative offset, |
| * with offset not divisible by eight, with negative length, or with |
| * 'offsetInBytes + length * 8' greater then buffer length causes throwing |
| * error at runtime. |
| * @author ngl@unipro.ru |
| */ |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(ByteBuffer buffer) { |
| int shift = (Float64List.bytesPerElement == 8) ? 3 : 0; |
| // creates Float64List view with negative offset |
| Expect.throws(() { |
| buffer.asFloat64List(-8); |
| }); |
| // creates Float64List view with offset not divisible by four |
| Expect.throws(() { |
| buffer.asFloat64List(1); |
| }); |
| // creates Float64List view with negative length |
| Expect.throws(() { |
| buffer.asFloat64List(0, -8); |
| }); |
| // creates Float64List view with 'offsetInBytes + length * 4' |
| // greater then buffer length |
| Expect.throws(() { |
| buffer.asFloat64List(8, buffer.lengthInBytes >> shift); |
| }); |
| } |
| |
| main() { |
| var list2 = new List.filled(8, 0); |
| var list4 = new Int32x4List(6); |
| |
| check((new Int8List.fromList(list2)).buffer); |
| check((new Int16List.fromList(list2)).buffer); |
| check((new Int32List.fromList(list2)).buffer); |
| check((new Int64List.fromList(list2)).buffer); |
| check((new Int32x4List.fromList(list4)).buffer); |
| } |