[6a3a178] | 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var global = require('../internals/global');
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| 4 | var DESCRIPTORS = require('../internals/descriptors');
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| 5 | var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = require('../internals/typed-array-constructors-require-wrappers');
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| 6 | var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
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| 7 | var ArrayBufferModule = require('../internals/array-buffer');
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| 8 | var anInstance = require('../internals/an-instance');
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| 9 | var createPropertyDescriptor = require('../internals/create-property-descriptor');
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| 10 | var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
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| 11 | var isInteger = require('../internals/is-integer');
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| 12 | var toLength = require('../internals/to-length');
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| 13 | var toIndex = require('../internals/to-index');
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| 14 | var toOffset = require('../internals/to-offset');
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| 15 | var toPropertyKey = require('../internals/to-property-key');
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| 16 | var has = require('../internals/has');
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| 17 | var classof = require('../internals/classof');
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| 18 | var isObject = require('../internals/is-object');
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| 19 | var isSymbol = require('../internals/is-symbol');
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| 20 | var create = require('../internals/object-create');
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| 21 | var setPrototypeOf = require('../internals/object-set-prototype-of');
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| 22 | var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
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| 23 | var typedArrayFrom = require('../internals/typed-array-from');
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| 24 | var forEach = require('../internals/array-iteration').forEach;
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| 25 | var setSpecies = require('../internals/set-species');
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| 26 | var definePropertyModule = require('../internals/object-define-property');
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| 27 | var getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');
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| 28 | var InternalStateModule = require('../internals/internal-state');
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| 29 | var inheritIfRequired = require('../internals/inherit-if-required');
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| 30 |
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| 31 | var getInternalState = InternalStateModule.get;
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| 32 | var setInternalState = InternalStateModule.set;
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| 33 | var nativeDefineProperty = definePropertyModule.f;
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| 34 | var nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;
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| 35 | var round = Math.round;
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| 36 | var RangeError = global.RangeError;
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| 37 | var ArrayBuffer = ArrayBufferModule.ArrayBuffer;
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| 38 | var DataView = ArrayBufferModule.DataView;
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| 39 | var NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
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| 40 | var TYPED_ARRAY_CONSTRUCTOR = ArrayBufferViewCore.TYPED_ARRAY_CONSTRUCTOR;
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| 41 | var TYPED_ARRAY_TAG = ArrayBufferViewCore.TYPED_ARRAY_TAG;
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| 42 | var TypedArray = ArrayBufferViewCore.TypedArray;
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| 43 | var TypedArrayPrototype = ArrayBufferViewCore.TypedArrayPrototype;
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| 44 | var aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;
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| 45 | var isTypedArray = ArrayBufferViewCore.isTypedArray;
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| 46 | var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
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| 47 | var WRONG_LENGTH = 'Wrong length';
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| 48 |
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| 49 | var fromList = function (C, list) {
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| 50 | var index = 0;
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| 51 | var length = list.length;
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| 52 | var result = new (aTypedArrayConstructor(C))(length);
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| 53 | while (length > index) result[index] = list[index++];
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| 54 | return result;
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| 55 | };
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| 56 |
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| 57 | var addGetter = function (it, key) {
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| 58 | nativeDefineProperty(it, key, { get: function () {
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| 59 | return getInternalState(this)[key];
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| 60 | } });
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| 61 | };
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| 62 |
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| 63 | var isArrayBuffer = function (it) {
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| 64 | var klass;
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| 65 | return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
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| 66 | };
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| 67 |
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| 68 | var isTypedArrayIndex = function (target, key) {
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| 69 | return isTypedArray(target)
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| 70 | && !isSymbol(key)
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| 71 | && key in target
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| 72 | && isInteger(+key)
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| 73 | && key >= 0;
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| 74 | };
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| 75 |
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| 76 | var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
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| 77 | key = toPropertyKey(key);
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| 78 | return isTypedArrayIndex(target, key)
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| 79 | ? createPropertyDescriptor(2, target[key])
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| 80 | : nativeGetOwnPropertyDescriptor(target, key);
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| 81 | };
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| 82 |
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| 83 | var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
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| 84 | key = toPropertyKey(key);
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| 85 | if (isTypedArrayIndex(target, key)
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| 86 | && isObject(descriptor)
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| 87 | && has(descriptor, 'value')
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| 88 | && !has(descriptor, 'get')
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| 89 | && !has(descriptor, 'set')
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| 90 | // TODO: add validation descriptor w/o calling accessors
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| 91 | && !descriptor.configurable
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| 92 | && (!has(descriptor, 'writable') || descriptor.writable)
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| 93 | && (!has(descriptor, 'enumerable') || descriptor.enumerable)
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| 94 | ) {
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| 95 | target[key] = descriptor.value;
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| 96 | return target;
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| 97 | } return nativeDefineProperty(target, key, descriptor);
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| 98 | };
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| 99 |
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| 100 | if (DESCRIPTORS) {
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| 101 | if (!NATIVE_ARRAY_BUFFER_VIEWS) {
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| 102 | getOwnPropertyDescriptorModule.f = wrappedGetOwnPropertyDescriptor;
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| 103 | definePropertyModule.f = wrappedDefineProperty;
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| 104 | addGetter(TypedArrayPrototype, 'buffer');
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| 105 | addGetter(TypedArrayPrototype, 'byteOffset');
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| 106 | addGetter(TypedArrayPrototype, 'byteLength');
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| 107 | addGetter(TypedArrayPrototype, 'length');
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| 108 | }
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| 109 |
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| 110 | $({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
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| 111 | getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
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| 112 | defineProperty: wrappedDefineProperty
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| 113 | });
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| 114 |
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| 115 | module.exports = function (TYPE, wrapper, CLAMPED) {
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| 116 | var BYTES = TYPE.match(/\d+$/)[0] / 8;
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| 117 | var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
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| 118 | var GETTER = 'get' + TYPE;
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| 119 | var SETTER = 'set' + TYPE;
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| 120 | var NativeTypedArrayConstructor = global[CONSTRUCTOR_NAME];
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| 121 | var TypedArrayConstructor = NativeTypedArrayConstructor;
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| 122 | var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
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| 123 | var exported = {};
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| 124 |
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| 125 | var getter = function (that, index) {
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| 126 | var data = getInternalState(that);
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| 127 | return data.view[GETTER](index * BYTES + data.byteOffset, true);
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| 128 | };
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| 129 |
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| 130 | var setter = function (that, index, value) {
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| 131 | var data = getInternalState(that);
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| 132 | if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
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| 133 | data.view[SETTER](index * BYTES + data.byteOffset, value, true);
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| 134 | };
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| 135 |
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| 136 | var addElement = function (that, index) {
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| 137 | nativeDefineProperty(that, index, {
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| 138 | get: function () {
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| 139 | return getter(this, index);
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| 140 | },
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| 141 | set: function (value) {
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| 142 | return setter(this, index, value);
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| 143 | },
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| 144 | enumerable: true
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| 145 | });
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| 146 | };
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| 147 |
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| 148 | if (!NATIVE_ARRAY_BUFFER_VIEWS) {
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| 149 | TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
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| 150 | anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
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| 151 | var index = 0;
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| 152 | var byteOffset = 0;
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| 153 | var buffer, byteLength, length;
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| 154 | if (!isObject(data)) {
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| 155 | length = toIndex(data);
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| 156 | byteLength = length * BYTES;
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| 157 | buffer = new ArrayBuffer(byteLength);
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| 158 | } else if (isArrayBuffer(data)) {
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| 159 | buffer = data;
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| 160 | byteOffset = toOffset(offset, BYTES);
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| 161 | var $len = data.byteLength;
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| 162 | if ($length === undefined) {
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| 163 | if ($len % BYTES) throw RangeError(WRONG_LENGTH);
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| 164 | byteLength = $len - byteOffset;
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| 165 | if (byteLength < 0) throw RangeError(WRONG_LENGTH);
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| 166 | } else {
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| 167 | byteLength = toLength($length) * BYTES;
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| 168 | if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);
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| 169 | }
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| 170 | length = byteLength / BYTES;
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| 171 | } else if (isTypedArray(data)) {
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| 172 | return fromList(TypedArrayConstructor, data);
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| 173 | } else {
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| 174 | return typedArrayFrom.call(TypedArrayConstructor, data);
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| 175 | }
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| 176 | setInternalState(that, {
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| 177 | buffer: buffer,
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| 178 | byteOffset: byteOffset,
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| 179 | byteLength: byteLength,
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| 180 | length: length,
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| 181 | view: new DataView(buffer)
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| 182 | });
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| 183 | while (index < length) addElement(that, index++);
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| 184 | });
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| 185 |
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| 186 | if (setPrototypeOf) setPrototypeOf(TypedArrayConstructor, TypedArray);
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| 187 | TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create(TypedArrayPrototype);
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| 188 | } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS) {
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| 189 | TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
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| 190 | anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
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| 191 | return inheritIfRequired(function () {
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| 192 | if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));
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| 193 | if (isArrayBuffer(data)) return $length !== undefined
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| 194 | ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)
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| 195 | : typedArrayOffset !== undefined
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| 196 | ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))
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| 197 | : new NativeTypedArrayConstructor(data);
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| 198 | if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
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| 199 | return typedArrayFrom.call(TypedArrayConstructor, data);
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| 200 | }(), dummy, TypedArrayConstructor);
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| 201 | });
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| 202 |
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| 203 | if (setPrototypeOf) setPrototypeOf(TypedArrayConstructor, TypedArray);
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| 204 | forEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {
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| 205 | if (!(key in TypedArrayConstructor)) {
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| 206 | createNonEnumerableProperty(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
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| 207 | }
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| 208 | });
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| 209 | TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
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| 210 | }
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| 211 |
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| 212 | if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
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| 213 | createNonEnumerableProperty(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
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| 214 | }
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| 215 |
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| 216 | createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_CONSTRUCTOR, TypedArrayConstructor);
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| 217 |
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| 218 | if (TYPED_ARRAY_TAG) {
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| 219 | createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
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| 220 | }
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| 221 |
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| 222 | exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
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| 223 |
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| 224 | $({
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| 225 | global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
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| 226 | }, exported);
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| 227 |
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| 228 | if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
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| 229 | createNonEnumerableProperty(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
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| 230 | }
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| 231 |
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| 232 | if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
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| 233 | createNonEnumerableProperty(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
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| 234 | }
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| 235 |
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| 236 | setSpecies(CONSTRUCTOR_NAME);
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| 237 | };
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| 238 | } else module.exports = function () { /* empty */ };
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