| // 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 |
| /// void setInt32( |
| /// int byteOffset, |
| /// int value, [ |
| /// Endian endian = Endian.big |
| /// ]) |
| /// Sets the four bytes starting at the specified [byteOffset] in this object to |
| /// the two's complement binary representation of the specified [value], which |
| /// must fit in four bytes. |
| /// In other words, [value] must lie between -pow(2, 31) and pow(2, 31) - 1, |
| /// inclusive. |
| /// @description Checks that the value at the [byteOffset] is set to [value]. |
| /// @author msyabro |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var i32 = new Int32List(16); |
| var valuesToBeSet = [ |
| 123, -95, -25, 98, 0, 113, -20, -9, 1, 2147483647, -2147483648, |
| -25, -69, -52, -125, 31 |
| ]; |
| var expectedBigEndian = [ |
| 2063597568, -1577058305, -402653185, 1644167168, 0, 1895825408, |
| -318767105, -134217729, 16777216, -129, 128, -402653185, -1140850689, |
| -855638017, -2080374785, 520093696 |
| ]; |
| int bytesInElement = Int32List.bytesPerElement; |
| |
| var byteDataFromI32 = new ByteData.view(i32.buffer); |
| for (int i = 0; i < byteDataFromI32.lengthInBytes / bytesInElement; ++i) { |
| byteDataFromI32.setInt32(i * bytesInElement, valuesToBeSet[i], |
| Endian.little); |
| } |
| Expect.listEquals(valuesToBeSet, i32); |
| |
| for (int i = 0; i < byteDataFromI32.lengthInBytes / bytesInElement; ++i) { |
| byteDataFromI32.setInt32(i * bytesInElement, valuesToBeSet[i]); |
| } |
| Expect.listEquals(expectedBigEndian, i32); |
| } |