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- 'use strict';
- var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');
- var DESCRIPTORS = require('../internals/descriptors');
- var global = require('../internals/global');
- var isCallable = require('../internals/is-callable');
- var isObject = require('../internals/is-object');
- var hasOwn = require('../internals/has-own-property');
- var classof = require('../internals/classof');
- var tryToString = require('../internals/try-to-string');
- var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
- var redefine = require('../internals/redefine');
- var defineProperty = require('../internals/object-define-property').f;
- var isPrototypeOf = require('../internals/object-is-prototype-of');
- 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 TypeError = global.TypeError;
- var TO_STRING_TAG = wellKnownSymbol('toStringTag');
- var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
- var TYPED_ARRAY_CONSTRUCTOR = uid('TYPED_ARRAY_CONSTRUCTOR');
- // 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_REQUIRED = false;
- var NAME, Constructor, Prototype;
- 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'
- || hasOwn(TypedArrayConstructorsList, klass)
- || hasOwn(BigIntArrayConstructorsList, klass);
- };
- var isTypedArray = function (it) {
- if (!isObject(it)) return false;
- var klass = classof(it);
- return hasOwn(TypedArrayConstructorsList, klass)
- || hasOwn(BigIntArrayConstructorsList, klass);
- };
- var aTypedArray = function (it) {
- if (isTypedArray(it)) return it;
- throw TypeError('Target is not a typed array');
- };
- var aTypedArrayConstructor = function (C) {
- if (isCallable(C) && (!setPrototypeOf || isPrototypeOf(TypedArray, C))) return C;
- throw TypeError(tryToString(C) + ' is not a typed array constructor');
- };
- var exportTypedArrayMethod = function (KEY, property, forced, options) {
- if (!DESCRIPTORS) return;
- if (forced) for (var ARRAY in TypedArrayConstructorsList) {
- var TypedArrayConstructor = global[ARRAY];
- if (TypedArrayConstructor && hasOwn(TypedArrayConstructor.prototype, KEY)) try {
- delete TypedArrayConstructor.prototype[KEY];
- } catch (error) {
- // old WebKit bug - some methods are non-configurable
- try {
- TypedArrayConstructor.prototype[KEY] = property;
- } catch (error2) { /* empty */ }
- }
- }
- if (!TypedArrayPrototype[KEY] || forced) {
- redefine(TypedArrayPrototype, KEY, forced ? property
- : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property, options);
- }
- };
- 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 && hasOwn(TypedArrayConstructor, KEY)) try {
- delete TypedArrayConstructor[KEY];
- } catch (error) { /* empty */ }
- }
- 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 && TypedArray[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) {
- Constructor = global[NAME];
- Prototype = Constructor && Constructor.prototype;
- if (Prototype) createNonEnumerableProperty(Prototype, TYPED_ARRAY_CONSTRUCTOR, Constructor);
- else NATIVE_ARRAY_BUFFER_VIEWS = false;
- }
- for (NAME in BigIntArrayConstructorsList) {
- Constructor = global[NAME];
- Prototype = Constructor && Constructor.prototype;
- if (Prototype) createNonEnumerableProperty(Prototype, TYPED_ARRAY_CONSTRUCTOR, Constructor);
- }
- // WebKit bug - typed arrays constructors prototype is Object.prototype
- if (!NATIVE_ARRAY_BUFFER_VIEWS || !isCallable(TypedArray) || 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 && !hasOwn(TypedArrayPrototype, TO_STRING_TAG)) {
- TYPED_ARRAY_TAG_REQUIRED = 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_CONSTRUCTOR: TYPED_ARRAY_CONSTRUCTOR,
- TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQUIRED && TYPED_ARRAY_TAG,
- aTypedArray: aTypedArray,
- aTypedArrayConstructor: aTypedArrayConstructor,
- exportTypedArrayMethod: exportTypedArrayMethod,
- exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,
- isView: isView,
- isTypedArray: isTypedArray,
- TypedArray: TypedArray,
- TypedArrayPrototype: TypedArrayPrototype
- };
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