You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
190 lines
7.3 KiB
190 lines
7.3 KiB
'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 defineBuiltIn = require('../internals/define-built-in'); |
|
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 InternalStateModule = require('../internals/internal-state'); |
|
|
|
var enforceInternalState = InternalStateModule.enforce; |
|
var getInternalState = InternalStateModule.get; |
|
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 = 'TypedArrayConstructor'; |
|
// 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 getTypedArrayConstructor = function (it) { |
|
var proto = getPrototypeOf(it); |
|
if (!isObject(proto)) return; |
|
var state = getInternalState(proto); |
|
return (state && hasOwn(state, TYPED_ARRAY_CONSTRUCTOR)) ? state[TYPED_ARRAY_CONSTRUCTOR] : getTypedArrayConstructor(proto); |
|
}; |
|
|
|
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) { |
|
defineBuiltIn(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 defineBuiltIn(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)) { |
|
defineBuiltIn(TypedArrayConstructor, KEY, property); |
|
} |
|
} |
|
}; |
|
|
|
for (NAME in TypedArrayConstructorsList) { |
|
Constructor = global[NAME]; |
|
Prototype = Constructor && Constructor.prototype; |
|
if (Prototype) enforceInternalState(Prototype)[TYPED_ARRAY_CONSTRUCTOR] = Constructor; |
|
else NATIVE_ARRAY_BUFFER_VIEWS = false; |
|
} |
|
|
|
for (NAME in BigIntArrayConstructorsList) { |
|
Constructor = global[NAME]; |
|
Prototype = Constructor && Constructor.prototype; |
|
if (Prototype) enforceInternalState(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_TAG: TYPED_ARRAY_TAG_REQUIRED && TYPED_ARRAY_TAG, |
|
aTypedArray: aTypedArray, |
|
aTypedArrayConstructor: aTypedArrayConstructor, |
|
exportTypedArrayMethod: exportTypedArrayMethod, |
|
exportTypedArrayStaticMethod: exportTypedArrayStaticMethod, |
|
getTypedArrayConstructor: getTypedArrayConstructor, |
|
isView: isView, |
|
isTypedArray: isTypedArray, |
|
TypedArray: TypedArray, |
|
TypedArrayPrototype: TypedArrayPrototype |
|
};
|
|
|