2 var global = require('../internals/global');
3 var uncurryThis = require('../internals/function-uncurry-this');
4 var DESCRIPTORS = require('../internals/descriptors');
5 var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-native');
6 var FunctionName = require('../internals/function-name');
7 var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
8 var redefineAll = require('../internals/redefine-all');
9 var fails = require('../internals/fails');
10 var anInstance = require('../internals/an-instance');
11 var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
12 var toLength = require('../internals/to-length');
13 var toIndex = require('../internals/to-index');
14 var IEEE754 = require('../internals/ieee754');
15 var getPrototypeOf = require('../internals/object-get-prototype-of');
16 var setPrototypeOf = require('../internals/object-set-prototype-of');
17 var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
18 var defineProperty = require('../internals/object-define-property').f;
19 var arrayFill = require('../internals/array-fill');
20 var arraySlice = require('../internals/array-slice-simple');
21 var setToStringTag = require('../internals/set-to-string-tag');
22 var InternalStateModule = require('../internals/internal-state');
24 var PROPER_FUNCTION_NAME = FunctionName.PROPER;
25 var CONFIGURABLE_FUNCTION_NAME = FunctionName.CONFIGURABLE;
26 var getInternalState = InternalStateModule.get;
27 var setInternalState = InternalStateModule.set;
28 var ARRAY_BUFFER = 'ArrayBuffer';
29 var DATA_VIEW = 'DataView';
30 var PROTOTYPE = 'prototype';
31 var WRONG_LENGTH = 'Wrong length';
32 var WRONG_INDEX = 'Wrong index';
33 var NativeArrayBuffer = global[ARRAY_BUFFER];
34 var $ArrayBuffer = NativeArrayBuffer;
35 var ArrayBufferPrototype = $ArrayBuffer && $ArrayBuffer[PROTOTYPE];
36 var $DataView = global[DATA_VIEW];
37 var DataViewPrototype = $DataView && $DataView[PROTOTYPE];
38 var ObjectPrototype = Object.prototype;
39 var Array = global.Array;
40 var RangeError = global.RangeError;
41 var fill = uncurryThis(arrayFill);
42 var reverse = uncurryThis([].reverse);
44 var packIEEE754 = IEEE754.pack;
45 var unpackIEEE754 = IEEE754.unpack;
47 var packInt8 = function (number) {
48 return [number & 0xFF];
51 var packInt16 = function (number) {
52 return [number & 0xFF, number >> 8 & 0xFF];
55 var packInt32 = function (number) {
56 return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
59 var unpackInt32 = function (buffer) {
60 return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
63 var packFloat32 = function (number) {
64 return packIEEE754(number, 23, 4);
67 var packFloat64 = function (number) {
68 return packIEEE754(number, 52, 8);
71 var addGetter = function (Constructor, key) {
72 defineProperty(Constructor[PROTOTYPE], key, { get: function () { return getInternalState(this)[key]; } });
75 var get = function (view, count, index, isLittleEndian) {
76 var intIndex = toIndex(index);
77 var store = getInternalState(view);
78 if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);
79 var bytes = getInternalState(store.buffer).bytes;
80 var start = intIndex + store.byteOffset;
81 var pack = arraySlice(bytes, start, start + count);
82 return isLittleEndian ? pack : reverse(pack);
85 var set = function (view, count, index, conversion, value, isLittleEndian) {
86 var intIndex = toIndex(index);
87 var store = getInternalState(view);
88 if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);
89 var bytes = getInternalState(store.buffer).bytes;
90 var start = intIndex + store.byteOffset;
91 var pack = conversion(+value);
92 for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
95 if (!NATIVE_ARRAY_BUFFER) {
96 $ArrayBuffer = function ArrayBuffer(length) {
97 anInstance(this, ArrayBufferPrototype);
98 var byteLength = toIndex(length);
99 setInternalState(this, {
100 bytes: fill(Array(byteLength), 0),
101 byteLength: byteLength
103 if (!DESCRIPTORS) this.byteLength = byteLength;
106 ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE];
108 $DataView = function DataView(buffer, byteOffset, byteLength) {
109 anInstance(this, DataViewPrototype);
110 anInstance(buffer, ArrayBufferPrototype);
111 var bufferLength = getInternalState(buffer).byteLength;
112 var offset = toIntegerOrInfinity(byteOffset);
113 if (offset < 0 || offset > bufferLength) throw RangeError('Wrong offset');
114 byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
115 if (offset + byteLength > bufferLength) throw RangeError(WRONG_LENGTH);
116 setInternalState(this, {
118 byteLength: byteLength,
122 this.buffer = buffer;
123 this.byteLength = byteLength;
124 this.byteOffset = offset;
128 DataViewPrototype = $DataView[PROTOTYPE];
131 addGetter($ArrayBuffer, 'byteLength');
132 addGetter($DataView, 'buffer');
133 addGetter($DataView, 'byteLength');
134 addGetter($DataView, 'byteOffset');
137 redefineAll(DataViewPrototype, {
138 getInt8: function getInt8(byteOffset) {
139 return get(this, 1, byteOffset)[0] << 24 >> 24;
141 getUint8: function getUint8(byteOffset) {
142 return get(this, 1, byteOffset)[0];
144 getInt16: function getInt16(byteOffset /* , littleEndian */) {
145 var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
146 return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
148 getUint16: function getUint16(byteOffset /* , littleEndian */) {
149 var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
150 return bytes[1] << 8 | bytes[0];
152 getInt32: function getInt32(byteOffset /* , littleEndian */) {
153 return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
155 getUint32: function getUint32(byteOffset /* , littleEndian */) {
156 return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
158 getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
159 return unpackIEEE754(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
161 getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
162 return unpackIEEE754(get(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
164 setInt8: function setInt8(byteOffset, value) {
165 set(this, 1, byteOffset, packInt8, value);
167 setUint8: function setUint8(byteOffset, value) {
168 set(this, 1, byteOffset, packInt8, value);
170 setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
171 set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
173 setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
174 set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
176 setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
177 set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
179 setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
180 set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
182 setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
183 set(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
185 setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
186 set(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
190 var INCORRECT_ARRAY_BUFFER_NAME = PROPER_FUNCTION_NAME && NativeArrayBuffer.name !== ARRAY_BUFFER;
191 /* eslint-disable no-new -- required for testing */
192 if (!fails(function () {
193 NativeArrayBuffer(1);
194 }) || !fails(function () {
195 new NativeArrayBuffer(-1);
196 }) || fails(function () {
197 new NativeArrayBuffer();
198 new NativeArrayBuffer(1.5);
199 new NativeArrayBuffer(NaN);
200 return INCORRECT_ARRAY_BUFFER_NAME && !CONFIGURABLE_FUNCTION_NAME;
202 /* eslint-enable no-new -- required for testing */
203 $ArrayBuffer = function ArrayBuffer(length) {
204 anInstance(this, ArrayBufferPrototype);
205 return new NativeArrayBuffer(toIndex(length));
208 $ArrayBuffer[PROTOTYPE] = ArrayBufferPrototype;
210 for (var keys = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys.length > j;) {
211 if (!((key = keys[j++]) in $ArrayBuffer)) {
212 createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]);
216 ArrayBufferPrototype.constructor = $ArrayBuffer;
217 } else if (INCORRECT_ARRAY_BUFFER_NAME && CONFIGURABLE_FUNCTION_NAME) {
218 createNonEnumerableProperty(NativeArrayBuffer, 'name', ARRAY_BUFFER);
221 // WebKit bug - the same parent prototype for typed arrays and data view
222 if (setPrototypeOf && getPrototypeOf(DataViewPrototype) !== ObjectPrototype) {
223 setPrototypeOf(DataViewPrototype, ObjectPrototype);
226 // iOS Safari 7.x bug
227 var testView = new $DataView(new $ArrayBuffer(2));
228 var $setInt8 = uncurryThis(DataViewPrototype.setInt8);
229 testView.setInt8(0, 2147483648);
230 testView.setInt8(1, 2147483649);
231 if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll(DataViewPrototype, {
232 setInt8: function setInt8(byteOffset, value) {
233 $setInt8(this, byteOffset, value << 24 >> 24);
235 setUint8: function setUint8(byteOffset, value) {
236 $setInt8(this, byteOffset, value << 24 >> 24);
238 }, { unsafe: true });
241 setToStringTag($ArrayBuffer, ARRAY_BUFFER);
242 setToStringTag($DataView, DATA_VIEW);
245 ArrayBuffer: $ArrayBuffer,