--- /dev/null
+'use strict';
+var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');
+var DESCRIPTORS = require('../internals/descriptors');
+var global = require('../internals/global');
+var isObject = require('../internals/is-object');
+var has = require('../internals/has');
+var classof = require('../internals/classof');
+var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
+var redefine = require('../internals/redefine');
+var defineProperty = require('../internals/object-define-property').f;
+var getPrototypeOf = require('../internals/object-get-prototype-of');
+var setPrototypeOf = require('../internals/object-set-prototype-of');
+var wellKnownSymbol = require('../internals/well-known-symbol');
+var uid = require('../internals/uid');
+
+var Int8Array = global.Int8Array;
+var Int8ArrayPrototype = Int8Array && Int8Array.prototype;
+var Uint8ClampedArray = global.Uint8ClampedArray;
+var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
+var TypedArray = Int8Array && getPrototypeOf(Int8Array);
+var TypedArrayPrototype = Int8ArrayPrototype && getPrototypeOf(Int8ArrayPrototype);
+var ObjectPrototype = Object.prototype;
+var isPrototypeOf = ObjectPrototype.isPrototypeOf;
+
+var TO_STRING_TAG = wellKnownSymbol('toStringTag');
+var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
+// Fixing native typed arrays in Opera Presto crashes the browser, see #595
+var NATIVE_ARRAY_BUFFER_VIEWS = NATIVE_ARRAY_BUFFER && !!setPrototypeOf && classof(global.opera) !== 'Opera';
+var TYPED_ARRAY_TAG_REQIRED = false;
+var NAME;
+
+var TypedArrayConstructorsList = {
+ Int8Array: 1,
+ Uint8Array: 1,
+ Uint8ClampedArray: 1,
+ Int16Array: 2,
+ Uint16Array: 2,
+ Int32Array: 4,
+ Uint32Array: 4,
+ Float32Array: 4,
+ Float64Array: 8
+};
+
+var BigIntArrayConstructorsList = {
+ BigInt64Array: 8,
+ BigUint64Array: 8
+};
+
+var isView = function isView(it) {
+ if (!isObject(it)) return false;
+ var klass = classof(it);
+ return klass === 'DataView'
+ || has(TypedArrayConstructorsList, klass)
+ || has(BigIntArrayConstructorsList, klass);
+};
+
+var isTypedArray = function (it) {
+ if (!isObject(it)) return false;
+ var klass = classof(it);
+ return has(TypedArrayConstructorsList, klass)
+ || has(BigIntArrayConstructorsList, klass);
+};
+
+var aTypedArray = function (it) {
+ if (isTypedArray(it)) return it;
+ throw TypeError('Target is not a typed array');
+};
+
+var aTypedArrayConstructor = function (C) {
+ if (setPrototypeOf) {
+ if (isPrototypeOf.call(TypedArray, C)) return C;
+ } else for (var ARRAY in TypedArrayConstructorsList) if (has(TypedArrayConstructorsList, NAME)) {
+ var TypedArrayConstructor = global[ARRAY];
+ if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {
+ return C;
+ }
+ } throw TypeError('Target is not a typed array constructor');
+};
+
+var exportTypedArrayMethod = function (KEY, property, forced) {
+ if (!DESCRIPTORS) return;
+ if (forced) for (var ARRAY in TypedArrayConstructorsList) {
+ var TypedArrayConstructor = global[ARRAY];
+ if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) {
+ delete TypedArrayConstructor.prototype[KEY];
+ }
+ }
+ if (!TypedArrayPrototype[KEY] || forced) {
+ redefine(TypedArrayPrototype, KEY, forced ? property
+ : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);
+ }
+};
+
+var exportTypedArrayStaticMethod = function (KEY, property, forced) {
+ var ARRAY, TypedArrayConstructor;
+ if (!DESCRIPTORS) return;
+ if (setPrototypeOf) {
+ if (forced) for (ARRAY in TypedArrayConstructorsList) {
+ TypedArrayConstructor = global[ARRAY];
+ if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) {
+ delete TypedArrayConstructor[KEY];
+ }
+ }
+ if (!TypedArray[KEY] || forced) {
+ // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
+ try {
+ return redefine(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS && Int8Array[KEY] || property);
+ } catch (error) { /* empty */ }
+ } else return;
+ }
+ for (ARRAY in TypedArrayConstructorsList) {
+ TypedArrayConstructor = global[ARRAY];
+ if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
+ redefine(TypedArrayConstructor, KEY, property);
+ }
+ }
+};
+
+for (NAME in TypedArrayConstructorsList) {
+ if (!global[NAME]) NATIVE_ARRAY_BUFFER_VIEWS = false;
+}
+
+// WebKit bug - typed arrays constructors prototype is Object.prototype
+if (!NATIVE_ARRAY_BUFFER_VIEWS || typeof TypedArray != 'function' || TypedArray === Function.prototype) {
+ // eslint-disable-next-line no-shadow -- safe
+ TypedArray = function TypedArray() {
+ throw TypeError('Incorrect invocation');
+ };
+ if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
+ if (global[NAME]) setPrototypeOf(global[NAME], TypedArray);
+ }
+}
+
+if (!NATIVE_ARRAY_BUFFER_VIEWS || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype) {
+ TypedArrayPrototype = TypedArray.prototype;
+ if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
+ if (global[NAME]) setPrototypeOf(global[NAME].prototype, TypedArrayPrototype);
+ }
+}
+
+// WebKit bug - one more object in Uint8ClampedArray prototype chain
+if (NATIVE_ARRAY_BUFFER_VIEWS && getPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {
+ setPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);
+}
+
+if (DESCRIPTORS && !has(TypedArrayPrototype, TO_STRING_TAG)) {
+ TYPED_ARRAY_TAG_REQIRED = true;
+ defineProperty(TypedArrayPrototype, TO_STRING_TAG, { get: function () {
+ return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;
+ } });
+ for (NAME in TypedArrayConstructorsList) if (global[NAME]) {
+ createNonEnumerableProperty(global[NAME], TYPED_ARRAY_TAG, NAME);
+ }
+}
+
+module.exports = {
+ NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS,
+ TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,
+ aTypedArray: aTypedArray,
+ aTypedArrayConstructor: aTypedArrayConstructor,
+ exportTypedArrayMethod: exportTypedArrayMethod,
+ exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,
+ isView: isView,
+ isTypedArray: isTypedArray,
+ TypedArray: TypedArray,
+ TypedArrayPrototype: TypedArrayPrototype
+};