| // Copyright (C) 2016 the V8 project authors. 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 |
| 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: [DataView.prototype.setUint8] |
| ---*/ |
| |
| var buffer = new ArrayBuffer(12); |
| var sample = new DataView(buffer, 0); |
| |
| sample.setUint8(0, 127); |
| sample.setUint8(1, 255); |
| sample.setUint8(2, 255); |
| sample.setUint8(3, 255); |
| sample.setUint8(4, 128); |
| sample.setUint8(5, 0); |
| sample.setUint8(6, 0); |
| sample.setUint8(7, 0); |
| sample.setUint8(8, 1); |
| sample.setUint8(9, 0); |
| sample.setUint8(10, 0); |
| sample.setUint8(11, 0); |
| |
| assert.sameValue(sample.getInt32(0, false), 2147483647, "0, false"); // 2**32-1 |
| assert.sameValue(sample.getInt32(1, false), -128, "1, false"); |
| assert.sameValue(sample.getInt32(2, false), -32768, "2, false"); |
| assert.sameValue(sample.getInt32(3, false), -8388608, "3, false"); |
| assert.sameValue(sample.getInt32(4, false), -2147483648, "4, false"); |
| assert.sameValue(sample.getInt32(5, false), 1, "5, false"); |
| assert.sameValue(sample.getInt32(6, false), 256, "6, false"); |
| assert.sameValue(sample.getInt32(7, false), 65536, "7, false"); |
| assert.sameValue(sample.getInt32(8, false), 16777216, "8, false"); |
| |
| assert.sameValue(sample.getInt32(0, true), -129, "0, true"); |
| assert.sameValue(sample.getInt32(1, true), -2130706433, "1, true"); |
| assert.sameValue(sample.getInt32(2, true), 8454143, "2, true"); |
| assert.sameValue(sample.getInt32(3, true), 33023, "3, true"); |
| assert.sameValue(sample.getInt32(4, true), 128, "4, true"); |
| assert.sameValue(sample.getInt32(5, true), 16777216, "5, true"); |
| assert.sameValue(sample.getInt32(6, true), 65536, "6, true"); |
| assert.sameValue(sample.getInt32(7, true), 256, "7, true"); |
| assert.sameValue(sample.getInt32(8, true), 1, "8, true"); |