| // 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 |
| /// int getUint16( |
| /// int byteOffset, [ |
| /// Endian endian = Endian.big |
| /// ]) |
| /// Returns the positive integer represented by the two bytes starting at the |
| /// specified [byteOffset] in this object, in unsigned binary form. |
| /// The return value will be between 0 and pow(2, 16) - 1, inclusive. |
| /// @description Checks that the correct value is returned. |
| /// @author msyabro |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var u16 = new Uint16List.fromList( |
| [0, 1, 65535, 32768, 12, 54, 100, 23, 98, 23, 43, 15, 3]); |
| var u32 = new Uint32List.fromList( |
| [0x62e7a17b, 0xf7ec7100, 0xe7180101, 0x1f83ccbb]); |
| int bytesInElement = Uint16List.bytesPerElement; |
| |
| var byteDataFromU16 = new ByteData.view(u16.buffer); |
| for (int i = 0; i < byteDataFromU16.lengthInBytes / bytesInElement; ++i) { |
| Expect.equals(u16[i], |
| byteDataFromU16.getUint16(i * bytesInElement, |
| Endian.little)); |
| } |
| |
| var byteDataFromU32 = new ByteData.view(u32.buffer); |
| var expectedBigEndian = [31649, 59234, 113, 60663, 257, 6375, 48076, 33567]; |
| var expectedLittleEndian = [ |
| 41339, 25319, 28928, 63468, 257, 59160, 52411, 8067 |
| ]; |
| for (int i = 0; i < byteDataFromU32.lengthInBytes / bytesInElement; ++i) { |
| Expect.equals(expectedBigEndian[i], |
| byteDataFromU32.getUint16(i * bytesInElement, Endian.big)); |
| Expect.equals(expectedLittleEndian[i], |
| byteDataFromU32.getUint16( |
| i * bytesInElement, Endian.little)); |
| } |
| } |