diff options
Diffstat (limited to 'node_modules/core-js/internals/array-buffer-view-core.js')
| -rw-r--r-- | node_modules/core-js/internals/array-buffer-view-core.js | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/node_modules/core-js/internals/array-buffer-view-core.js b/node_modules/core-js/internals/array-buffer-view-core.js new file mode 100644 index 0000000..c904eba --- /dev/null +++ b/node_modules/core-js/internals/array-buffer-view-core.js @@ -0,0 +1,167 @@ +'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 + 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 +}; |
