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// |reftest| shell-option(--enable-arraybuffer-resizable) skip-if(!ArrayBuffer.prototype.resize||!xulRuntime.shell) -- resizable-arraybuffer is not enabled unconditionally, requires shell-options
'use strict';
// Copyright 2021 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-arraybuffer-length
description: >
Automatically ported from MapShrinkMidIteration test
in V8's mjsunit test typedarray-resizablearraybuffer.js
includes: [compareArray.js]
features: [resizable-arraybuffer]
flags: [onlyStrict]
---*/
class MyUint8Array extends Uint8Array {
}
class MyFloat32Array extends Float32Array {
}
class MyBigInt64Array extends BigInt64Array {
}
const builtinCtors = [
Uint8Array,
Int8Array,
Uint16Array,
Int16Array,
Uint32Array,
Int32Array,
Float32Array,
Float64Array,
Uint8ClampedArray,
BigUint64Array,
BigInt64Array
];
const ctors = [
...builtinCtors,
MyUint8Array,
MyFloat32Array,
MyBigInt64Array
];
function CreateResizableArrayBuffer(byteLength, maxByteLength) {
return new ArrayBuffer(byteLength, { maxByteLength: maxByteLength });
}
function IsBigIntTypedArray(ta) {
return ta instanceof BigInt64Array || ta instanceof BigUint64Array;
}
function WriteToTypedArray(array, index, value) {
if (array instanceof BigInt64Array || array instanceof BigUint64Array) {
array[index] = BigInt(value);
} else {
array[index] = value;
}
}
const TypedArrayMapHelper = (ta, ...rest) => {
return ta.map(...rest);
};
const ArrayMapHelper = (ta, ...rest) => {
return Array.prototype.map.call(ta, ...rest);
};
function MapShrinkMidIteration(mapHelper, hasUndefined) {
// Orig. array: [0, 2, 4, 6]
// [0, 2, 4, 6] << fixedLength
// [4, 6] << fixedLengthWithOffset
// [0, 2, 4, 6, ...] << lengthTracking
// [4, 6, ...] << lengthTrackingWithOffset
function CreateRabForTest(ctor) {
const rab = CreateResizableArrayBuffer(4 * ctor.BYTES_PER_ELEMENT, 8 * ctor.BYTES_PER_ELEMENT);
// Write some data into the array.
const taWrite = new ctor(rab);
for (let i = 0; i < 4; ++i) {
WriteToTypedArray(taWrite, i, 2 * i);
}
return rab;
}
let values;
let rab;
let resizeAfter;
let resizeTo;
function CollectValuesAndResize(n, ix, ta) {
if (typeof n == 'bigint') {
values.push(Number(n));
} else {
values.push(n);
}
if (values.length == resizeAfter) {
rab.resize(resizeTo);
}
// We still need to return a valid BigInt / non-BigInt, even if
// n is `undefined`.
if (IsBigIntTypedArray(ta)) {
return 0n;
}
return 0;
}
function Helper(array) {
values = [];
mapHelper(array, CollectValuesAndResize);
return values;
}
for (let ctor of ctors) {
rab = CreateRabForTest(ctor);
const fixedLength = new ctor(rab, 0, 4);
resizeAfter = 2;
resizeTo = 3 * ctor.BYTES_PER_ELEMENT;
if (hasUndefined) {
assert.compareArray(Helper(fixedLength), [
0,
2,
undefined,
undefined
]);
} else {
assert.compareArray(Helper(fixedLength), [
0,
2
]);
}
}
for (let ctor of ctors) {
rab = CreateRabForTest(ctor);
const fixedLengthWithOffset = new ctor(rab, 2 * ctor.BYTES_PER_ELEMENT, 2);
resizeAfter = 1;
resizeTo = 3 * ctor.BYTES_PER_ELEMENT;
if (hasUndefined) {
assert.compareArray(Helper(fixedLengthWithOffset), [
4,
undefined
]);
} else {
assert.compareArray(Helper(fixedLengthWithOffset), [4]);
}
}
for (let ctor of ctors) {
rab = CreateRabForTest(ctor);
const lengthTracking = new ctor(rab, 0);
resizeAfter = 2;
resizeTo = 3 * ctor.BYTES_PER_ELEMENT;
if (hasUndefined) {
assert.compareArray(Helper(lengthTracking), [
0,
2,
4,
undefined
]);
} else {
assert.compareArray(Helper(lengthTracking), [
0,
2,
4
]);
}
}
for (let ctor of ctors) {
rab = CreateRabForTest(ctor);
const lengthTrackingWithOffset = new ctor(rab, 2 * ctor.BYTES_PER_ELEMENT);
resizeAfter = 1;
resizeTo = 3 * ctor.BYTES_PER_ELEMENT;
if (hasUndefined) {
assert.compareArray(Helper(lengthTrackingWithOffset), [
4,
undefined
]);
} else {
assert.compareArray(Helper(lengthTrackingWithOffset), [4]);
}
}
}
MapShrinkMidIteration(TypedArrayMapHelper, true);
MapShrinkMidIteration(ArrayMapHelper, false);
reportCompare(0, 0);
|
