[6a3a178] | 1 | 'use strict';
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| 2 | var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');
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| 3 | var DESCRIPTORS = require('../internals/descriptors');
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| 4 | var global = require('../internals/global');
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| 5 | var isObject = require('../internals/is-object');
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| 6 | var has = require('../internals/has');
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| 7 | var classof = require('../internals/classof');
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| 8 | var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
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| 9 | var redefine = require('../internals/redefine');
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| 10 | var defineProperty = require('../internals/object-define-property').f;
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| 11 | var getPrototypeOf = require('../internals/object-get-prototype-of');
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| 12 | var setPrototypeOf = require('../internals/object-set-prototype-of');
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| 13 | var wellKnownSymbol = require('../internals/well-known-symbol');
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| 14 | var uid = require('../internals/uid');
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| 15 |
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| 16 | var Int8Array = global.Int8Array;
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| 17 | var Int8ArrayPrototype = Int8Array && Int8Array.prototype;
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| 18 | var Uint8ClampedArray = global.Uint8ClampedArray;
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| 19 | var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
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| 20 | var TypedArray = Int8Array && getPrototypeOf(Int8Array);
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| 21 | var TypedArrayPrototype = Int8ArrayPrototype && getPrototypeOf(Int8ArrayPrototype);
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| 22 | var ObjectPrototype = Object.prototype;
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| 23 | var isPrototypeOf = ObjectPrototype.isPrototypeOf;
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| 24 |
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| 25 | var TO_STRING_TAG = wellKnownSymbol('toStringTag');
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| 26 | var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
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| 27 | var TYPED_ARRAY_CONSTRUCTOR = uid('TYPED_ARRAY_CONSTRUCTOR');
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| 28 | // Fixing native typed arrays in Opera Presto crashes the browser, see #595
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| 29 | var NATIVE_ARRAY_BUFFER_VIEWS = NATIVE_ARRAY_BUFFER && !!setPrototypeOf && classof(global.opera) !== 'Opera';
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| 30 | var TYPED_ARRAY_TAG_REQIRED = false;
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| 31 | var NAME, Constructor, Prototype;
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| 32 |
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| 33 | var TypedArrayConstructorsList = {
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| 34 | Int8Array: 1,
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| 35 | Uint8Array: 1,
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| 36 | Uint8ClampedArray: 1,
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| 37 | Int16Array: 2,
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| 38 | Uint16Array: 2,
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| 39 | Int32Array: 4,
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| 40 | Uint32Array: 4,
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| 41 | Float32Array: 4,
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| 42 | Float64Array: 8
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| 43 | };
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| 44 |
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| 45 | var BigIntArrayConstructorsList = {
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| 46 | BigInt64Array: 8,
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| 47 | BigUint64Array: 8
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| 48 | };
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| 49 |
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| 50 | var isView = function isView(it) {
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| 51 | if (!isObject(it)) return false;
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| 52 | var klass = classof(it);
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| 53 | return klass === 'DataView'
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| 54 | || has(TypedArrayConstructorsList, klass)
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| 55 | || has(BigIntArrayConstructorsList, klass);
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| 56 | };
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| 57 |
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| 58 | var isTypedArray = function (it) {
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| 59 | if (!isObject(it)) return false;
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| 60 | var klass = classof(it);
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| 61 | return has(TypedArrayConstructorsList, klass)
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| 62 | || has(BigIntArrayConstructorsList, klass);
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| 63 | };
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| 64 |
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| 65 | var aTypedArray = function (it) {
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| 66 | if (isTypedArray(it)) return it;
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| 67 | throw TypeError('Target is not a typed array');
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| 68 | };
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| 69 |
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| 70 | var aTypedArrayConstructor = function (C) {
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| 71 | if (setPrototypeOf && !isPrototypeOf.call(TypedArray, C)) {
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| 72 | throw TypeError('Target is not a typed array constructor');
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| 73 | } return C;
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| 74 | };
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| 75 |
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| 76 | var exportTypedArrayMethod = function (KEY, property, forced) {
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| 77 | if (!DESCRIPTORS) return;
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| 78 | if (forced) for (var ARRAY in TypedArrayConstructorsList) {
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| 79 | var TypedArrayConstructor = global[ARRAY];
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| 80 | if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) try {
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| 81 | delete TypedArrayConstructor.prototype[KEY];
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| 82 | } catch (error) { /* empty */ }
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| 83 | }
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| 84 | if (!TypedArrayPrototype[KEY] || forced) {
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| 85 | redefine(TypedArrayPrototype, KEY, forced ? property
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| 86 | : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);
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| 87 | }
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| 88 | };
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| 89 |
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| 90 | var exportTypedArrayStaticMethod = function (KEY, property, forced) {
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| 91 | var ARRAY, TypedArrayConstructor;
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| 92 | if (!DESCRIPTORS) return;
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| 93 | if (setPrototypeOf) {
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| 94 | if (forced) for (ARRAY in TypedArrayConstructorsList) {
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| 95 | TypedArrayConstructor = global[ARRAY];
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| 96 | if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) try {
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| 97 | delete TypedArrayConstructor[KEY];
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| 98 | } catch (error) { /* empty */ }
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| 99 | }
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| 100 | if (!TypedArray[KEY] || forced) {
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| 101 | // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
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| 102 | try {
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| 103 | return redefine(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS && TypedArray[KEY] || property);
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| 104 | } catch (error) { /* empty */ }
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| 105 | } else return;
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| 106 | }
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| 107 | for (ARRAY in TypedArrayConstructorsList) {
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| 108 | TypedArrayConstructor = global[ARRAY];
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| 109 | if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
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| 110 | redefine(TypedArrayConstructor, KEY, property);
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| 111 | }
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| 112 | }
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| 113 | };
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| 114 |
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| 115 | for (NAME in TypedArrayConstructorsList) {
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| 116 | Constructor = global[NAME];
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| 117 | Prototype = Constructor && Constructor.prototype;
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| 118 | if (Prototype) createNonEnumerableProperty(Prototype, TYPED_ARRAY_CONSTRUCTOR, Constructor);
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| 119 | else NATIVE_ARRAY_BUFFER_VIEWS = false;
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| 120 | }
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| 121 |
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| 122 | for (NAME in BigIntArrayConstructorsList) {
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| 123 | Constructor = global[NAME];
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| 124 | Prototype = Constructor && Constructor.prototype;
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| 125 | if (Prototype) createNonEnumerableProperty(Prototype, TYPED_ARRAY_CONSTRUCTOR, Constructor);
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| 126 | }
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| 127 |
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| 128 | // WebKit bug - typed arrays constructors prototype is Object.prototype
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| 129 | if (!NATIVE_ARRAY_BUFFER_VIEWS || typeof TypedArray != 'function' || TypedArray === Function.prototype) {
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| 130 | // eslint-disable-next-line no-shadow -- safe
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| 131 | TypedArray = function TypedArray() {
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| 132 | throw TypeError('Incorrect invocation');
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| 133 | };
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| 134 | if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
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| 135 | if (global[NAME]) setPrototypeOf(global[NAME], TypedArray);
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| 136 | }
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| 137 | }
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| 138 |
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| 139 | if (!NATIVE_ARRAY_BUFFER_VIEWS || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype) {
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| 140 | TypedArrayPrototype = TypedArray.prototype;
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| 141 | if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
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| 142 | if (global[NAME]) setPrototypeOf(global[NAME].prototype, TypedArrayPrototype);
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| 143 | }
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| 144 | }
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| 145 |
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| 146 | // WebKit bug - one more object in Uint8ClampedArray prototype chain
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| 147 | if (NATIVE_ARRAY_BUFFER_VIEWS && getPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {
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| 148 | setPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);
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| 149 | }
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| 150 |
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| 151 | if (DESCRIPTORS && !has(TypedArrayPrototype, TO_STRING_TAG)) {
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| 152 | TYPED_ARRAY_TAG_REQIRED = true;
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| 153 | defineProperty(TypedArrayPrototype, TO_STRING_TAG, { get: function () {
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| 154 | return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;
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| 155 | } });
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| 156 | for (NAME in TypedArrayConstructorsList) if (global[NAME]) {
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| 157 | createNonEnumerableProperty(global[NAME], TYPED_ARRAY_TAG, NAME);
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| 158 | }
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| 159 | }
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| 160 |
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| 161 | module.exports = {
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| 162 | NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS,
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| 163 | TYPED_ARRAY_CONSTRUCTOR: TYPED_ARRAY_CONSTRUCTOR,
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| 164 | TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,
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| 165 | aTypedArray: aTypedArray,
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| 166 | aTypedArrayConstructor: aTypedArrayConstructor,
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| 167 | exportTypedArrayMethod: exportTypedArrayMethod,
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| 168 | exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,
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| 169 | isView: isView,
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| 170 | isTypedArray: isTypedArray,
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| 171 | TypedArray: TypedArray,
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| 172 | TypedArrayPrototype: TypedArrayPrototype
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| 173 | };
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