core-js
Version:
Standard library
221 lines (198 loc) • 9.45 kB
JavaScript
;
if (require('../internals/descriptors')) {
var global = require('../internals/global');
var $export = require('../internals/export');
var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = require('../internals/typed-arrays-constructors-requires-wrappers');
var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
var ArrayBufferModule = require('../internals/array-buffer');
var anInstance = require('../internals/an-instance');
var createPropertyDescriptor = require('../internals/create-property-descriptor');
var hide = require('../internals/hide');
var toLength = require('../internals/to-length');
var toIndex = require('../internals/to-index');
var toOffset = require('../internals/to-offset');
var toPrimitive = require('../internals/to-primitive');
var has = require('../internals/has');
var classof = require('../internals/classof');
var isObject = require('../internals/is-object');
var create = require('../internals/object-create');
var setPrototypeOf = require('../internals/object-set-prototype-of');
var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
var typedArrayFrom = require('../internals/typed-array-from');
var arrayForEach = require('../internals/array-methods')(0);
var setSpecies = require('../internals/set-species');
var definePropertyModule = require('../internals/object-define-property');
var getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');
var InternalStateModule = require('../internals/internal-state');
var getInternalState = InternalStateModule.get;
var setInternalState = InternalStateModule.set;
var nativeDefineProperty = definePropertyModule.f;
var nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;
var RangeError = global.RangeError;
var ArrayBuffer = ArrayBufferModule.ArrayBuffer;
var DataView = ArrayBufferModule.DataView;
var NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
var TYPED_ARRAY_TAG = ArrayBufferViewCore.TYPED_ARRAY_TAG;
var TypedArray = ArrayBufferViewCore.TypedArray;
var TypedArrayPrototype = ArrayBufferViewCore.TypedArrayPrototype;
var aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;
var isTypedArray = ArrayBufferViewCore.isTypedArray;
var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
var WRONG_LENGTH = 'Wrong length';
var fromList = function (C, list) {
var index = 0;
var length = list.length;
var result = new (aTypedArrayConstructor(C))(length);
while (length > index) result[index] = list[index++];
return result;
};
var addGetter = function (it, key) {
nativeDefineProperty(it, key, { get: function () {
return getInternalState(this)[key];
} });
};
var isArrayBuffer = function (it) {
var klass;
return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
};
var isTypedArrayIndex = function (target, key) {
return isTypedArray(target)
&& typeof key != 'symbol'
&& key in target
&& String(+key) == String(key);
};
var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
return isTypedArrayIndex(target, key = toPrimitive(key, true))
? createPropertyDescriptor(2, target[key])
: nativeGetOwnPropertyDescriptor(target, key);
};
var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
if (isTypedArrayIndex(target, key = toPrimitive(key, true))
&& isObject(descriptor)
&& has(descriptor, 'value')
&& !has(descriptor, 'get')
&& !has(descriptor, 'set')
// TODO: add validation descriptor w/o calling accessors
&& !descriptor.configurable
&& (!has(descriptor, 'writable') || descriptor.writable)
&& (!has(descriptor, 'enumerable') || descriptor.enumerable)
) {
target[key] = descriptor.value;
return target;
} return nativeDefineProperty(target, key, descriptor);
};
if (!NATIVE_ARRAY_BUFFER_VIEWS) {
getOwnPropertyDescriptorModule.f = wrappedGetOwnPropertyDescriptor;
definePropertyModule.f = wrappedDefineProperty;
addGetter(TypedArrayPrototype, 'buffer');
addGetter(TypedArrayPrototype, 'byteOffset');
addGetter(TypedArrayPrototype, 'byteLength');
addGetter(TypedArrayPrototype, 'length');
}
$export({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
defineProperty: wrappedDefineProperty
});
// eslint-disable-next-line max-statements
module.exports = function (TYPE, BYTES, wrapper, CLAMPED) {
var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
var GETTER = 'get' + TYPE;
var SETTER = 'set' + TYPE;
var NativeTypedArrayConstructor = global[CONSTRUCTOR_NAME];
var TypedArrayConstructor = NativeTypedArrayConstructor;
var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
var exported = {};
var getter = function (that, index) {
var data = getInternalState(that);
return data.view[GETTER](index * BYTES + data.byteOffset, true);
};
var setter = function (that, index, value) {
var data = getInternalState(that);
if (CLAMPED) value = (value = Math.round(value)) < 0 ? 0 : value > 0xff ? 0xff : value & 0xff;
data.view[SETTER](index * BYTES + data.byteOffset, value, true);
};
var addElement = function (that, index) {
nativeDefineProperty(that, index, {
get: function () {
return getter(this, index);
},
set: function (value) {
return setter(this, index, value);
},
enumerable: true
});
};
if (!NATIVE_ARRAY_BUFFER_VIEWS) {
TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
var index = 0;
var byteOffset = 0;
var buffer, byteLength, length;
if (!isObject(data)) {
length = toIndex(data);
byteLength = length * BYTES;
buffer = new ArrayBuffer(byteLength);
} else if (isArrayBuffer(data)) {
buffer = data;
byteOffset = toOffset(offset, BYTES);
var $len = data.byteLength;
if ($length === undefined) {
if ($len % BYTES) throw RangeError(WRONG_LENGTH);
byteLength = $len - byteOffset;
if (byteLength < 0) throw RangeError(WRONG_LENGTH);
} else {
byteLength = toLength($length) * BYTES;
if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);
}
length = byteLength / BYTES;
} else if (isTypedArray(data)) {
return fromList(TypedArrayConstructor, data);
} else {
return typedArrayFrom.call(TypedArrayConstructor, data);
}
setInternalState(that, {
buffer: buffer,
byteOffset: byteOffset,
byteLength: byteLength,
length: length,
view: new DataView(buffer)
});
while (index < length) addElement(that, index++);
});
if (setPrototypeOf) setPrototypeOf(TypedArrayConstructor, TypedArray);
TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create(TypedArrayPrototype);
} else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS) {
TypedArrayConstructor = wrapper(function (that, data, typedArrayOffset, $length) {
anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));
if (isArrayBuffer(data)) return $length !== undefined
? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)
: typedArrayOffset !== undefined
? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))
: new NativeTypedArrayConstructor(data);
if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
return typedArrayFrom.call(TypedArrayConstructor, data);
});
if (setPrototypeOf) setPrototypeOf(TypedArrayConstructor, TypedArray);
arrayForEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {
if (!(key in TypedArrayConstructor)) hide(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
});
TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
}
if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
hide(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
}
if (TYPED_ARRAY_TAG) hide(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
$export({
global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
}, exported);
if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
hide(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
}
if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
hide(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
}
setSpecies(CONSTRUCTOR_NAME);
};
} else module.exports = function () { /* empty */ };