| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // Copyright (C) 2017 Mozilla Corporation. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-dataview.prototype.getint32 |
| description: > |
| Return values from Buffer using a custom offset |
| info: | |
| 24.2.4.9 DataView.prototype.getInt32 ( byteOffset [ , littleEndian ] ) |
| |
| 1. Let v be the this value. |
| 2. If littleEndian is not present, let littleEndian be false. |
| 3. Return ? GetViewValue(v, byteOffset, littleEndian, "Int32"). |
| |
| 24.2.1.1 GetViewValue ( view, requestIndex, isLittleEndian, type ) |
| |
| ... |
| 14. Let bufferIndex be getIndex + viewOffset. |
| 15. Return GetValueFromBuffer(buffer, bufferIndex, type, isLittleEndian). |
| ... |
| |
| 24.1.1.5 GetValueFromBuffer ( arrayBuffer, byteIndex, type [ , isLittleEndian |
| ] ) |
| |
| ... |
| 8. If isLittleEndian is false, reverse the order of the elements of rawValue. |
| ... |
| features: [SharedArrayBuffer] |
| ---*/ |
| |
| var buffer = new SharedArrayBuffer(12); |
| var sample = new DataView(buffer, 0); |
| |
| sample.setUint8(0, 39); |
| sample.setUint8(1, 2); |
| sample.setUint8(2, 6); |
| sample.setUint8(3, 2); |
| sample.setUint8(4, 128); |
| sample.setUint8(5, 0); |
| sample.setUint8(6, 128); |
| sample.setUint8(7, 1); |
| sample.setUint8(8, 127); |
| sample.setUint8(9, 0); |
| sample.setUint8(10, 127); |
| sample.setUint8(11, 1); |
| |
| sample = new DataView(buffer, 4); |
| |
| assert.sameValue(sample.getInt32(0, false), -2147450879, "0, false"); |
| assert.sameValue(sample.getInt32(1, false), 8388991, "1, false"); |
| assert.sameValue(sample.getInt32(2, false), -2147385600, "2, false"); |
| assert.sameValue(sample.getInt32(3, false), 25100415, "3, false"); |
| |
| assert.sameValue(sample.getInt32(0, true), 25165952, "0, true"); |
| assert.sameValue(sample.getInt32(1, true), 2130804736, "1, true"); |
| assert.sameValue(sample.getInt32(2, true), 8323456, "2, true"); |
| assert.sameValue(sample.getInt32(3, true), 2130738945, "3, true"); |