87 lines
2.6 KiB
JavaScript
Executable file
87 lines
2.6 KiB
JavaScript
Executable file
'use strict';
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var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
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var global = require('../internals/global');
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var fails = require('../internals/fails');
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var aFunction = require('../internals/a-function');
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var toLength = require('../internals/to-length');
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var internalSort = require('../internals/array-sort');
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var FF = require('../internals/engine-ff-version');
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var IE_OR_EDGE = require('../internals/engine-is-ie-or-edge');
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var V8 = require('../internals/engine-v8-version');
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var WEBKIT = require('../internals/engine-webkit-version');
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var aTypedArray = ArrayBufferViewCore.aTypedArray;
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var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
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var Uint16Array = global.Uint16Array;
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var nativeSort = Uint16Array && Uint16Array.prototype.sort;
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// WebKit
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var ACCEPT_INCORRECT_ARGUMENTS = !!nativeSort && !fails(function () {
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var array = new Uint16Array(2);
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array.sort(null);
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array.sort({});
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});
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var STABLE_SORT = !!nativeSort && !fails(function () {
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// feature detection can be too slow, so check engines versions
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if (V8) return V8 < 74;
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if (FF) return FF < 67;
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if (IE_OR_EDGE) return true;
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if (WEBKIT) return WEBKIT < 602;
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var array = new Uint16Array(516);
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var expected = Array(516);
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var index, mod;
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for (index = 0; index < 516; index++) {
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mod = index % 4;
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array[index] = 515 - index;
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expected[index] = index - 2 * mod + 3;
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}
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array.sort(function (a, b) {
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return (a / 4 | 0) - (b / 4 | 0);
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});
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for (index = 0; index < 516; index++) {
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if (array[index] !== expected[index]) return true;
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}
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});
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var getSortCompare = function (comparefn) {
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return function (x, y) {
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if (comparefn !== undefined) return +comparefn(x, y) || 0;
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// eslint-disable-next-line no-self-compare -- NaN check
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if (y !== y) return -1;
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// eslint-disable-next-line no-self-compare -- NaN check
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if (x !== x) return 1;
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if (x === 0 && y === 0) return 1 / x > 0 && 1 / y < 0 ? 1 : -1;
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return x > y;
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};
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};
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// `%TypedArray%.prototype.sort` method
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// https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
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exportTypedArrayMethod('sort', function sort(comparefn) {
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var array = this;
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if (comparefn !== undefined) aFunction(comparefn);
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if (STABLE_SORT) return nativeSort.call(array, comparefn);
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aTypedArray(array);
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var arrayLength = toLength(array.length);
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var items = Array(arrayLength);
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var index;
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for (index = 0; index < arrayLength; index++) {
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items[index] = array[index];
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}
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items = internalSort(array, getSortCompare(comparefn));
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for (index = 0; index < arrayLength; index++) {
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array[index] = items[index];
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}
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return array;
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}, !STABLE_SORT || ACCEPT_INCORRECT_ARGUMENTS);
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