Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | (function(global, utils) { |
| 6 | |
| 7 | %CheckIsBootstrapping(); |
| 8 | |
| 9 | // ---------------------------------------------------------------------------- |
| 10 | // Imports |
| 11 | |
| 12 | var GlobalArray = global.Array; |
| 13 | var GlobalBoolean = global.Boolean; |
| 14 | var GlobalNumber = global.Number; |
| 15 | var GlobalObject = global.Object; |
| 16 | var InternalArray = utils.InternalArray; |
| 17 | var iteratorSymbol = utils.ImportNow("iterator_symbol"); |
| 18 | var MakeRangeError; |
| 19 | var MakeSyntaxError; |
| 20 | var MakeTypeError; |
| 21 | var MathAbs; |
| 22 | var NaN = %GetRootNaN(); |
| 23 | var ObjectToString = utils.ImportNow("object_to_string"); |
| 24 | var ObserveBeginPerformSplice; |
| 25 | var ObserveEndPerformSplice; |
| 26 | var ObserveEnqueueSpliceRecord; |
| 27 | var SameValue = utils.ImportNow("SameValue"); |
| 28 | var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol"); |
| 29 | |
| 30 | utils.Import(function(from) { |
| 31 | MakeRangeError = from.MakeRangeError; |
| 32 | MakeSyntaxError = from.MakeSyntaxError; |
| 33 | MakeTypeError = from.MakeTypeError; |
| 34 | MathAbs = from.MathAbs; |
| 35 | ObserveBeginPerformSplice = from.ObserveBeginPerformSplice; |
| 36 | ObserveEndPerformSplice = from.ObserveEndPerformSplice; |
| 37 | ObserveEnqueueSpliceRecord = from.ObserveEnqueueSpliceRecord; |
| 38 | }); |
| 39 | |
| 40 | // ---------------------------------------------------------------------------- |
| 41 | |
| 42 | |
| 43 | // ES6 18.2.3 isNaN(number) |
| 44 | function GlobalIsNaN(number) { |
| 45 | number = TO_NUMBER(number); |
| 46 | return NUMBER_IS_NAN(number); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | // ES6 18.2.2 isFinite(number) |
| 51 | function GlobalIsFinite(number) { |
| 52 | number = TO_NUMBER(number); |
| 53 | return NUMBER_IS_FINITE(number); |
| 54 | } |
| 55 | |
| 56 | |
| 57 | // ES6 18.2.5 parseInt(string, radix) |
| 58 | function GlobalParseInt(string, radix) { |
| 59 | if (IS_UNDEFINED(radix) || radix === 10 || radix === 0) { |
| 60 | // Some people use parseInt instead of Math.floor. This |
| 61 | // optimization makes parseInt on a Smi 12 times faster (60ns |
| 62 | // vs 800ns). The following optimization makes parseInt on a |
| 63 | // non-Smi number 9 times faster (230ns vs 2070ns). Together |
| 64 | // they make parseInt on a string 1.4% slower (274ns vs 270ns). |
| 65 | if (%_IsSmi(string)) return string; |
| 66 | if (IS_NUMBER(string) && |
| 67 | ((0.01 < string && string < 1e9) || |
| 68 | (-1e9 < string && string < -0.01))) { |
| 69 | // Truncate number. |
| 70 | return string | 0; |
| 71 | } |
| 72 | string = TO_STRING(string); |
| 73 | radix = radix | 0; |
| 74 | } else { |
| 75 | // The spec says ToString should be evaluated before ToInt32. |
| 76 | string = TO_STRING(string); |
| 77 | radix = TO_INT32(radix); |
| 78 | if (!(radix == 0 || (2 <= radix && radix <= 36))) { |
| 79 | return NaN; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | if (%_HasCachedArrayIndex(string) && |
| 84 | (radix == 0 || radix == 10)) { |
| 85 | return %_GetCachedArrayIndex(string); |
| 86 | } |
| 87 | return %StringParseInt(string, radix); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | // ES6 18.2.4 parseFloat(string) |
| 92 | function GlobalParseFloat(string) { |
| 93 | // 1. Let inputString be ? ToString(string). |
| 94 | string = TO_STRING(string); |
| 95 | if (%_HasCachedArrayIndex(string)) return %_GetCachedArrayIndex(string); |
| 96 | return %StringParseFloat(string); |
| 97 | } |
| 98 | |
| 99 | |
| 100 | // ---------------------------------------------------------------------------- |
| 101 | |
| 102 | // Set up global object. |
| 103 | var attributes = DONT_ENUM | DONT_DELETE | READ_ONLY; |
| 104 | |
| 105 | utils.InstallConstants(global, [ |
| 106 | // ES6 18.1.1 |
| 107 | "Infinity", INFINITY, |
| 108 | // ES6 18.1.2 |
| 109 | "NaN", NaN, |
| 110 | // ES6 18.1.3 |
| 111 | "undefined", UNDEFINED, |
| 112 | ]); |
| 113 | |
| 114 | // Set up non-enumerable function on the global object. |
| 115 | utils.InstallFunctions(global, DONT_ENUM, [ |
| 116 | "isNaN", GlobalIsNaN, |
| 117 | "isFinite", GlobalIsFinite, |
| 118 | "parseInt", GlobalParseInt, |
| 119 | "parseFloat", GlobalParseFloat, |
| 120 | ]); |
| 121 | |
| 122 | |
| 123 | // ---------------------------------------------------------------------------- |
| 124 | // Object |
| 125 | |
| 126 | // ES6 19.1.3.5 Object.prototype.toLocaleString([reserved1 [,reserved2]]) |
| 127 | function ObjectToLocaleString() { |
| 128 | CHECK_OBJECT_COERCIBLE(this, "Object.prototype.toLocaleString"); |
| 129 | return this.toString(); |
| 130 | } |
| 131 | |
| 132 | |
| 133 | // ES6 19.1.3.7 Object.prototype.valueOf() |
| 134 | function ObjectValueOf() { |
| 135 | return TO_OBJECT(this); |
| 136 | } |
| 137 | |
| 138 | |
| 139 | // ES6 7.3.11 |
| 140 | function ObjectHasOwnProperty(value) { |
| 141 | var name = TO_NAME(value); |
| 142 | var object = TO_OBJECT(this); |
| 143 | return %HasOwnProperty(object, name); |
| 144 | } |
| 145 | |
| 146 | |
| 147 | // ES6 19.1.3.3 Object.prototype.isPrototypeOf(V) |
| 148 | function ObjectIsPrototypeOf(V) { |
| 149 | if (!IS_RECEIVER(V)) return false; |
| 150 | var O = TO_OBJECT(this); |
| 151 | return %HasInPrototypeChain(V, O); |
| 152 | } |
| 153 | |
| 154 | |
| 155 | // ES6 19.1.3.4 |
| 156 | function ObjectPropertyIsEnumerable(V) { |
| 157 | var P = TO_NAME(V); |
| 158 | return %PropertyIsEnumerable(TO_OBJECT(this), P); |
| 159 | } |
| 160 | |
| 161 | |
| 162 | // Extensions for providing property getters and setters. |
| 163 | function ObjectDefineGetter(name, fun) { |
| 164 | var receiver = this; |
| 165 | if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { |
| 166 | receiver = %GlobalProxy(ObjectDefineGetter); |
| 167 | } |
| 168 | if (!IS_CALLABLE(fun)) { |
| 169 | throw MakeTypeError(kObjectGetterExpectingFunction); |
| 170 | } |
| 171 | var desc = new PropertyDescriptor(); |
| 172 | desc.setGet(fun); |
| 173 | desc.setEnumerable(true); |
| 174 | desc.setConfigurable(true); |
| 175 | DefineOwnProperty(TO_OBJECT(receiver), TO_NAME(name), desc, false); |
| 176 | } |
| 177 | |
| 178 | |
| 179 | function ObjectLookupGetter(name) { |
| 180 | var receiver = this; |
| 181 | if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { |
| 182 | receiver = %GlobalProxy(ObjectLookupGetter); |
| 183 | } |
| 184 | return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), GETTER); |
| 185 | } |
| 186 | |
| 187 | |
| 188 | function ObjectDefineSetter(name, fun) { |
| 189 | var receiver = this; |
| 190 | if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { |
| 191 | receiver = %GlobalProxy(ObjectDefineSetter); |
| 192 | } |
| 193 | if (!IS_CALLABLE(fun)) { |
| 194 | throw MakeTypeError(kObjectSetterExpectingFunction); |
| 195 | } |
| 196 | var desc = new PropertyDescriptor(); |
| 197 | desc.setSet(fun); |
| 198 | desc.setEnumerable(true); |
| 199 | desc.setConfigurable(true); |
| 200 | DefineOwnProperty(TO_OBJECT(receiver), TO_NAME(name), desc, false); |
| 201 | } |
| 202 | |
| 203 | |
| 204 | function ObjectLookupSetter(name) { |
| 205 | var receiver = this; |
| 206 | if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { |
| 207 | receiver = %GlobalProxy(ObjectLookupSetter); |
| 208 | } |
| 209 | return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), SETTER); |
| 210 | } |
| 211 | |
| 212 | |
| 213 | // ES6 6.2.4.1 |
| 214 | function IsAccessorDescriptor(desc) { |
| 215 | if (IS_UNDEFINED(desc)) return false; |
| 216 | return desc.hasGetter() || desc.hasSetter(); |
| 217 | } |
| 218 | |
| 219 | |
| 220 | // ES6 6.2.4.2 |
| 221 | function IsDataDescriptor(desc) { |
| 222 | if (IS_UNDEFINED(desc)) return false; |
| 223 | return desc.hasValue() || desc.hasWritable(); |
| 224 | } |
| 225 | |
| 226 | |
| 227 | // ES6 6.2.4.3 |
| 228 | function IsGenericDescriptor(desc) { |
| 229 | if (IS_UNDEFINED(desc)) return false; |
| 230 | return !(IsAccessorDescriptor(desc) || IsDataDescriptor(desc)); |
| 231 | } |
| 232 | |
| 233 | |
| 234 | function IsInconsistentDescriptor(desc) { |
| 235 | return IsAccessorDescriptor(desc) && IsDataDescriptor(desc); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | // Harmony Proxies |
| 240 | function FromGenericPropertyDescriptor(desc) { |
| 241 | if (IS_UNDEFINED(desc)) return desc; |
| 242 | var obj = new GlobalObject(); |
| 243 | |
| 244 | if (desc.hasValue()) { |
| 245 | %AddNamedProperty(obj, "value", desc.getValue(), NONE); |
| 246 | } |
| 247 | if (desc.hasWritable()) { |
| 248 | %AddNamedProperty(obj, "writable", desc.isWritable(), NONE); |
| 249 | } |
| 250 | if (desc.hasGetter()) { |
| 251 | %AddNamedProperty(obj, "get", desc.getGet(), NONE); |
| 252 | } |
| 253 | if (desc.hasSetter()) { |
| 254 | %AddNamedProperty(obj, "set", desc.getSet(), NONE); |
| 255 | } |
| 256 | if (desc.hasEnumerable()) { |
| 257 | %AddNamedProperty(obj, "enumerable", desc.isEnumerable(), NONE); |
| 258 | } |
| 259 | if (desc.hasConfigurable()) { |
| 260 | %AddNamedProperty(obj, "configurable", desc.isConfigurable(), NONE); |
| 261 | } |
| 262 | return obj; |
| 263 | } |
| 264 | |
| 265 | |
| 266 | // ES6 6.2.4.5 |
| 267 | function ToPropertyDescriptor(obj) { |
| 268 | if (!IS_RECEIVER(obj)) throw MakeTypeError(kPropertyDescObject, obj); |
| 269 | |
| 270 | var desc = new PropertyDescriptor(); |
| 271 | |
| 272 | if ("enumerable" in obj) { |
| 273 | desc.setEnumerable(TO_BOOLEAN(obj.enumerable)); |
| 274 | } |
| 275 | |
| 276 | if ("configurable" in obj) { |
| 277 | desc.setConfigurable(TO_BOOLEAN(obj.configurable)); |
| 278 | } |
| 279 | |
| 280 | if ("value" in obj) { |
| 281 | desc.setValue(obj.value); |
| 282 | } |
| 283 | |
| 284 | if ("writable" in obj) { |
| 285 | desc.setWritable(TO_BOOLEAN(obj.writable)); |
| 286 | } |
| 287 | |
| 288 | if ("get" in obj) { |
| 289 | var get = obj.get; |
| 290 | if (!IS_UNDEFINED(get) && !IS_CALLABLE(get)) { |
| 291 | throw MakeTypeError(kObjectGetterCallable, get); |
| 292 | } |
| 293 | desc.setGet(get); |
| 294 | } |
| 295 | |
| 296 | if ("set" in obj) { |
| 297 | var set = obj.set; |
| 298 | if (!IS_UNDEFINED(set) && !IS_CALLABLE(set)) { |
| 299 | throw MakeTypeError(kObjectSetterCallable, set); |
| 300 | } |
| 301 | desc.setSet(set); |
| 302 | } |
| 303 | |
| 304 | if (IsInconsistentDescriptor(desc)) { |
| 305 | throw MakeTypeError(kValueAndAccessor, obj); |
| 306 | } |
| 307 | return desc; |
| 308 | } |
| 309 | |
| 310 | // TODO(cbruni): remove once callers have been removed |
| 311 | function ToCompletePropertyDescriptor(obj) { |
| 312 | var desc = ToPropertyDescriptor(obj); |
| 313 | if (IsGenericDescriptor(desc) || IsDataDescriptor(desc)) { |
| 314 | if (!desc.hasValue()) desc.setValue(UNDEFINED); |
| 315 | if (!desc.hasWritable()) desc.setWritable(false); |
| 316 | } else { |
| 317 | // Is accessor descriptor. |
| 318 | if (!desc.hasGetter()) desc.setGet(UNDEFINED); |
| 319 | if (!desc.hasSetter()) desc.setSet(UNDEFINED); |
| 320 | } |
| 321 | if (!desc.hasEnumerable()) desc.setEnumerable(false); |
| 322 | if (!desc.hasConfigurable()) desc.setConfigurable(false); |
| 323 | return desc; |
| 324 | } |
| 325 | |
| 326 | |
| 327 | function PropertyDescriptor() { |
| 328 | // Initialize here so they are all in-object and have the same map. |
| 329 | // Default values from ES5 8.6.1. |
| 330 | this.value_ = UNDEFINED; |
| 331 | this.hasValue_ = false; |
| 332 | this.writable_ = false; |
| 333 | this.hasWritable_ = false; |
| 334 | this.enumerable_ = false; |
| 335 | this.hasEnumerable_ = false; |
| 336 | this.configurable_ = false; |
| 337 | this.hasConfigurable_ = false; |
| 338 | this.get_ = UNDEFINED; |
| 339 | this.hasGetter_ = false; |
| 340 | this.set_ = UNDEFINED; |
| 341 | this.hasSetter_ = false; |
| 342 | } |
| 343 | |
| 344 | utils.SetUpLockedPrototype(PropertyDescriptor, [ |
| 345 | "value_", |
| 346 | "hasValue_", |
| 347 | "writable_", |
| 348 | "hasWritable_", |
| 349 | "enumerable_", |
| 350 | "hasEnumerable_", |
| 351 | "configurable_", |
| 352 | "hasConfigurable_", |
| 353 | "get_", |
| 354 | "hasGetter_", |
| 355 | "set_", |
| 356 | "hasSetter_" |
| 357 | ], [ |
| 358 | "toString", function PropertyDescriptor_ToString() { |
| 359 | return "[object PropertyDescriptor]"; |
| 360 | }, |
| 361 | "setValue", function PropertyDescriptor_SetValue(value) { |
| 362 | this.value_ = value; |
| 363 | this.hasValue_ = true; |
| 364 | }, |
| 365 | "getValue", function PropertyDescriptor_GetValue() { |
| 366 | return this.value_; |
| 367 | }, |
| 368 | "hasValue", function PropertyDescriptor_HasValue() { |
| 369 | return this.hasValue_; |
| 370 | }, |
| 371 | "setEnumerable", function PropertyDescriptor_SetEnumerable(enumerable) { |
| 372 | this.enumerable_ = enumerable; |
| 373 | this.hasEnumerable_ = true; |
| 374 | }, |
| 375 | "isEnumerable", function PropertyDescriptor_IsEnumerable() { |
| 376 | return this.enumerable_; |
| 377 | }, |
| 378 | "hasEnumerable", function PropertyDescriptor_HasEnumerable() { |
| 379 | return this.hasEnumerable_; |
| 380 | }, |
| 381 | "setWritable", function PropertyDescriptor_SetWritable(writable) { |
| 382 | this.writable_ = writable; |
| 383 | this.hasWritable_ = true; |
| 384 | }, |
| 385 | "isWritable", function PropertyDescriptor_IsWritable() { |
| 386 | return this.writable_; |
| 387 | }, |
| 388 | "hasWritable", function PropertyDescriptor_HasWritable() { |
| 389 | return this.hasWritable_; |
| 390 | }, |
| 391 | "setConfigurable", |
| 392 | function PropertyDescriptor_SetConfigurable(configurable) { |
| 393 | this.configurable_ = configurable; |
| 394 | this.hasConfigurable_ = true; |
| 395 | }, |
| 396 | "hasConfigurable", function PropertyDescriptor_HasConfigurable() { |
| 397 | return this.hasConfigurable_; |
| 398 | }, |
| 399 | "isConfigurable", function PropertyDescriptor_IsConfigurable() { |
| 400 | return this.configurable_; |
| 401 | }, |
| 402 | "setGet", function PropertyDescriptor_SetGetter(get) { |
| 403 | this.get_ = get; |
| 404 | this.hasGetter_ = true; |
| 405 | }, |
| 406 | "getGet", function PropertyDescriptor_GetGetter() { |
| 407 | return this.get_; |
| 408 | }, |
| 409 | "hasGetter", function PropertyDescriptor_HasGetter() { |
| 410 | return this.hasGetter_; |
| 411 | }, |
| 412 | "setSet", function PropertyDescriptor_SetSetter(set) { |
| 413 | this.set_ = set; |
| 414 | this.hasSetter_ = true; |
| 415 | }, |
| 416 | "getSet", function PropertyDescriptor_GetSetter() { |
| 417 | return this.set_; |
| 418 | }, |
| 419 | "hasSetter", function PropertyDescriptor_HasSetter() { |
| 420 | return this.hasSetter_; |
| 421 | } |
| 422 | ]); |
| 423 | |
| 424 | |
| 425 | // Converts an array returned from Runtime_GetOwnProperty to an actual |
| 426 | // property descriptor. For a description of the array layout please |
| 427 | // see the runtime.cc file. |
| 428 | function ConvertDescriptorArrayToDescriptor(desc_array) { |
| 429 | if (IS_UNDEFINED(desc_array)) { |
| 430 | return UNDEFINED; |
| 431 | } |
| 432 | |
| 433 | var desc = new PropertyDescriptor(); |
| 434 | // This is an accessor. |
| 435 | if (desc_array[IS_ACCESSOR_INDEX]) { |
| 436 | desc.setGet(desc_array[GETTER_INDEX]); |
| 437 | desc.setSet(desc_array[SETTER_INDEX]); |
| 438 | } else { |
| 439 | desc.setValue(desc_array[VALUE_INDEX]); |
| 440 | desc.setWritable(desc_array[WRITABLE_INDEX]); |
| 441 | } |
| 442 | desc.setEnumerable(desc_array[ENUMERABLE_INDEX]); |
| 443 | desc.setConfigurable(desc_array[CONFIGURABLE_INDEX]); |
| 444 | |
| 445 | return desc; |
| 446 | } |
| 447 | |
| 448 | |
| 449 | // For Harmony proxies. |
| 450 | function GetTrap(handler, name, defaultTrap) { |
| 451 | var trap = handler[name]; |
| 452 | if (IS_UNDEFINED(trap)) { |
| 453 | if (IS_UNDEFINED(defaultTrap)) { |
| 454 | throw MakeTypeError(kIllegalInvocation); |
| 455 | } |
| 456 | trap = defaultTrap; |
| 457 | } else if (!IS_CALLABLE(trap)) { |
| 458 | throw MakeTypeError(kIllegalInvocation); |
| 459 | } |
| 460 | return trap; |
| 461 | } |
| 462 | |
| 463 | |
| 464 | function CallTrap1(handler, name, defaultTrap, x) { |
| 465 | return %_Call(GetTrap(handler, name, defaultTrap), handler, x); |
| 466 | } |
| 467 | |
| 468 | |
| 469 | function CallTrap2(handler, name, defaultTrap, x, y) { |
| 470 | return %_Call(GetTrap(handler, name, defaultTrap), handler, x, y); |
| 471 | } |
| 472 | |
| 473 | |
| 474 | // ES5 section 8.12.1. |
| 475 | // TODO(jkummerow): Deprecated. Migrate all callers to |
| 476 | // ObjectGetOwnPropertyDescriptor and delete this. |
| 477 | function GetOwnPropertyJS(obj, v) { |
| 478 | var p = TO_NAME(v); |
| 479 | if (IS_PROXY(obj)) { |
| 480 | // TODO(rossberg): adjust once there is a story for symbols vs proxies. |
| 481 | if (IS_SYMBOL(v)) return UNDEFINED; |
| 482 | |
| 483 | var handler = %JSProxyGetHandler(obj); |
| 484 | var descriptor = CallTrap1( |
| 485 | handler, "getOwnPropertyDescriptor", UNDEFINED, p); |
| 486 | if (IS_UNDEFINED(descriptor)) return descriptor; |
| 487 | var desc = ToCompletePropertyDescriptor(descriptor); |
| 488 | if (!desc.isConfigurable()) { |
| 489 | throw MakeTypeError(kIllegalInvocation); |
| 490 | } |
| 491 | return desc; |
| 492 | } |
| 493 | |
| 494 | // GetOwnProperty returns an array indexed by the constants |
| 495 | // defined in macros.py. |
| 496 | // If p is not a property on obj undefined is returned. |
| 497 | var props = %GetOwnProperty_Legacy(TO_OBJECT(obj), p); |
| 498 | |
| 499 | return ConvertDescriptorArrayToDescriptor(props); |
| 500 | } |
| 501 | |
| 502 | |
| 503 | // ES6 7.3.9 |
| 504 | function GetMethod(obj, p) { |
| 505 | var func = obj[p]; |
| 506 | if (IS_NULL_OR_UNDEFINED(func)) return UNDEFINED; |
| 507 | if (IS_CALLABLE(func)) return func; |
| 508 | throw MakeTypeError(kCalledNonCallable, typeof func); |
| 509 | } |
| 510 | |
| 511 | |
| 512 | // Harmony proxies. |
| 513 | function DefineProxyProperty(obj, p, attributes, should_throw) { |
| 514 | // TODO(rossberg): adjust once there is a story for symbols vs proxies. |
| 515 | if (IS_SYMBOL(p)) return false; |
| 516 | |
| 517 | var handler = %JSProxyGetHandler(obj); |
| 518 | var result = CallTrap2(handler, "defineProperty", UNDEFINED, p, attributes); |
| 519 | if (!result) { |
| 520 | if (should_throw) { |
| 521 | throw MakeTypeError(kIllegalInvocation); |
| 522 | } else { |
| 523 | return false; |
| 524 | } |
| 525 | } |
| 526 | return true; |
| 527 | } |
| 528 | |
| 529 | |
| 530 | // ES6 9.1.6 [[DefineOwnProperty]](P, Desc) |
| 531 | function DefineObjectProperty(obj, p, desc, should_throw) { |
| 532 | var current_array = %GetOwnProperty_Legacy(obj, TO_NAME(p)); |
| 533 | var current = ConvertDescriptorArrayToDescriptor(current_array); |
| 534 | var extensible = %object_is_extensible(obj); |
| 535 | |
| 536 | if (IS_UNDEFINED(current) && !extensible) { |
| 537 | if (should_throw) { |
| 538 | throw MakeTypeError(kDefineDisallowed, p); |
| 539 | } else { |
| 540 | return false; |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | if (!IS_UNDEFINED(current)) { |
| 545 | if ((IsGenericDescriptor(desc) || |
| 546 | IsDataDescriptor(desc) == IsDataDescriptor(current)) && |
| 547 | (!desc.hasEnumerable() || |
| 548 | SameValue(desc.isEnumerable(), current.isEnumerable())) && |
| 549 | (!desc.hasConfigurable() || |
| 550 | SameValue(desc.isConfigurable(), current.isConfigurable())) && |
| 551 | (!desc.hasWritable() || |
| 552 | SameValue(desc.isWritable(), current.isWritable())) && |
| 553 | (!desc.hasValue() || |
| 554 | SameValue(desc.getValue(), current.getValue())) && |
| 555 | (!desc.hasGetter() || |
| 556 | SameValue(desc.getGet(), current.getGet())) && |
| 557 | (!desc.hasSetter() || |
| 558 | SameValue(desc.getSet(), current.getSet()))) { |
| 559 | return true; |
| 560 | } |
| 561 | if (!current.isConfigurable()) { |
| 562 | // Step 7 |
| 563 | if (desc.isConfigurable() || |
| 564 | (desc.hasEnumerable() && |
| 565 | desc.isEnumerable() != current.isEnumerable())) { |
| 566 | if (should_throw) { |
| 567 | throw MakeTypeError(kRedefineDisallowed, p); |
| 568 | } else { |
| 569 | return false; |
| 570 | } |
| 571 | } |
| 572 | // Step 8 |
| 573 | if (!IsGenericDescriptor(desc)) { |
| 574 | // Step 9a |
| 575 | if (IsDataDescriptor(current) != IsDataDescriptor(desc)) { |
| 576 | if (should_throw) { |
| 577 | throw MakeTypeError(kRedefineDisallowed, p); |
| 578 | } else { |
| 579 | return false; |
| 580 | } |
| 581 | } |
| 582 | // Step 10a |
| 583 | if (IsDataDescriptor(current) && IsDataDescriptor(desc)) { |
| 584 | var currentIsWritable = current.isWritable(); |
| 585 | if (currentIsWritable != desc.isWritable()) { |
| 586 | if (!currentIsWritable || IS_STRONG(obj)) { |
| 587 | if (should_throw) { |
| 588 | throw currentIsWritable |
| 589 | ? MakeTypeError(kStrongRedefineDisallowed, obj, p) |
| 590 | : MakeTypeError(kRedefineDisallowed, p); |
| 591 | } else { |
| 592 | return false; |
| 593 | } |
| 594 | } |
| 595 | } |
| 596 | if (!currentIsWritable && desc.hasValue() && |
| 597 | !SameValue(desc.getValue(), current.getValue())) { |
| 598 | if (should_throw) { |
| 599 | throw MakeTypeError(kRedefineDisallowed, p); |
| 600 | } else { |
| 601 | return false; |
| 602 | } |
| 603 | } |
| 604 | } |
| 605 | // Step 11 |
| 606 | if (IsAccessorDescriptor(desc) && IsAccessorDescriptor(current)) { |
| 607 | if (desc.hasSetter() && |
| 608 | !SameValue(desc.getSet(), current.getSet())) { |
| 609 | if (should_throw) { |
| 610 | throw MakeTypeError(kRedefineDisallowed, p); |
| 611 | } else { |
| 612 | return false; |
| 613 | } |
| 614 | } |
| 615 | if (desc.hasGetter() && !SameValue(desc.getGet(),current.getGet())) { |
| 616 | if (should_throw) { |
| 617 | throw MakeTypeError(kRedefineDisallowed, p); |
| 618 | } else { |
| 619 | return false; |
| 620 | } |
| 621 | } |
| 622 | } |
| 623 | } |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | // Send flags - enumerable and configurable are common - writable is |
| 628 | // only send to the data descriptor. |
| 629 | // Take special care if enumerable and configurable is not defined on |
| 630 | // desc (we need to preserve the existing values from current). |
| 631 | var flag = NONE; |
| 632 | if (desc.hasEnumerable()) { |
| 633 | flag |= desc.isEnumerable() ? 0 : DONT_ENUM; |
| 634 | } else if (!IS_UNDEFINED(current)) { |
| 635 | flag |= current.isEnumerable() ? 0 : DONT_ENUM; |
| 636 | } else { |
| 637 | flag |= DONT_ENUM; |
| 638 | } |
| 639 | |
| 640 | if (desc.hasConfigurable()) { |
| 641 | flag |= desc.isConfigurable() ? 0 : DONT_DELETE; |
| 642 | } else if (!IS_UNDEFINED(current)) { |
| 643 | flag |= current.isConfigurable() ? 0 : DONT_DELETE; |
| 644 | } else |
| 645 | flag |= DONT_DELETE; |
| 646 | |
| 647 | if (IsDataDescriptor(desc) || |
| 648 | (IsGenericDescriptor(desc) && |
| 649 | (IS_UNDEFINED(current) || IsDataDescriptor(current)))) { |
| 650 | // There are 3 cases that lead here: |
| 651 | // Step 4a - defining a new data property. |
| 652 | // Steps 9b & 12 - replacing an existing accessor property with a data |
| 653 | // property. |
| 654 | // Step 12 - updating an existing data property with a data or generic |
| 655 | // descriptor. |
| 656 | |
| 657 | if (desc.hasWritable()) { |
| 658 | flag |= desc.isWritable() ? 0 : READ_ONLY; |
| 659 | } else if (!IS_UNDEFINED(current)) { |
| 660 | flag |= current.isWritable() ? 0 : READ_ONLY; |
| 661 | } else { |
| 662 | flag |= READ_ONLY; |
| 663 | } |
| 664 | |
| 665 | var value = UNDEFINED; // Default value is undefined. |
| 666 | if (desc.hasValue()) { |
| 667 | value = desc.getValue(); |
| 668 | } else if (!IS_UNDEFINED(current) && IsDataDescriptor(current)) { |
| 669 | value = current.getValue(); |
| 670 | } |
| 671 | |
| 672 | %DefineDataPropertyUnchecked(obj, p, value, flag); |
| 673 | } else { |
| 674 | // There are 3 cases that lead here: |
| 675 | // Step 4b - defining a new accessor property. |
| 676 | // Steps 9c & 12 - replacing an existing data property with an accessor |
| 677 | // property. |
| 678 | // Step 12 - updating an existing accessor property with an accessor |
| 679 | // descriptor. |
| 680 | var getter = null; |
| 681 | if (desc.hasGetter()) { |
| 682 | getter = desc.getGet(); |
| 683 | } else if (IsAccessorDescriptor(current) && current.hasGetter()) { |
| 684 | getter = current.getGet(); |
| 685 | } |
| 686 | var setter = null; |
| 687 | if (desc.hasSetter()) { |
| 688 | setter = desc.getSet(); |
| 689 | } else if (IsAccessorDescriptor(current) && current.hasSetter()) { |
| 690 | setter = current.getSet(); |
| 691 | } |
| 692 | %DefineAccessorPropertyUnchecked(obj, p, getter, setter, flag); |
| 693 | } |
| 694 | return true; |
| 695 | } |
| 696 | |
| 697 | |
| 698 | // ES5 section 15.4.5.1. |
| 699 | function DefineArrayProperty(obj, p, desc, should_throw) { |
| 700 | // Step 3 - Special handling for array index. |
| 701 | if (!IS_SYMBOL(p)) { |
| 702 | var index = TO_UINT32(p); |
| 703 | var emit_splice = false; |
| 704 | if (TO_STRING(index) == p && index != 4294967295) { |
| 705 | var length = obj.length; |
| 706 | if (index >= length && %IsObserved(obj)) { |
| 707 | emit_splice = true; |
| 708 | ObserveBeginPerformSplice(obj); |
| 709 | } |
| 710 | |
| 711 | var length_desc = GetOwnPropertyJS(obj, "length"); |
| 712 | if ((index >= length && !length_desc.isWritable()) || |
| 713 | !DefineObjectProperty(obj, p, desc, true)) { |
| 714 | if (emit_splice) |
| 715 | ObserveEndPerformSplice(obj); |
| 716 | if (should_throw) { |
| 717 | throw MakeTypeError(kDefineDisallowed, p); |
| 718 | } else { |
| 719 | return false; |
| 720 | } |
| 721 | } |
| 722 | if (index >= length) { |
| 723 | obj.length = index + 1; |
| 724 | } |
| 725 | if (emit_splice) { |
| 726 | ObserveEndPerformSplice(obj); |
| 727 | ObserveEnqueueSpliceRecord(obj, length, [], index + 1 - length); |
| 728 | } |
| 729 | return true; |
| 730 | } |
| 731 | } |
| 732 | |
| 733 | // Step 5 - Fallback to default implementation. |
| 734 | return DefineObjectProperty(obj, p, desc, should_throw); |
| 735 | } |
| 736 | |
| 737 | |
| 738 | // ES5 section 8.12.9, ES5 section 15.4.5.1 and Harmony proxies. |
| 739 | function DefineOwnProperty(obj, p, desc, should_throw) { |
| 740 | if (IS_PROXY(obj)) { |
| 741 | // TODO(rossberg): adjust once there is a story for symbols vs proxies. |
| 742 | if (IS_SYMBOL(p)) return false; |
| 743 | |
| 744 | var attributes = FromGenericPropertyDescriptor(desc); |
| 745 | return DefineProxyProperty(obj, p, attributes, should_throw); |
| 746 | } else if (IS_ARRAY(obj)) { |
| 747 | return DefineArrayProperty(obj, p, desc, should_throw); |
| 748 | } else { |
| 749 | return DefineObjectProperty(obj, p, desc, should_throw); |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | |
| 754 | // ES6 section 19.1.2.9 |
| 755 | function ObjectGetPrototypeOf(obj) { |
| 756 | return %_GetPrototype(TO_OBJECT(obj)); |
| 757 | } |
| 758 | |
| 759 | // ES6 section 19.1.2.18. |
| 760 | function ObjectSetPrototypeOf(obj, proto) { |
| 761 | CHECK_OBJECT_COERCIBLE(obj, "Object.setPrototypeOf"); |
| 762 | |
| 763 | if (proto !== null && !IS_RECEIVER(proto)) { |
| 764 | throw MakeTypeError(kProtoObjectOrNull, proto); |
| 765 | } |
| 766 | |
| 767 | if (IS_RECEIVER(obj)) { |
| 768 | %SetPrototype(obj, proto); |
| 769 | } |
| 770 | |
| 771 | return obj; |
| 772 | } |
| 773 | |
| 774 | |
| 775 | // ES6 section 19.1.2.6 |
| 776 | function ObjectGetOwnPropertyDescriptor(obj, p) { |
| 777 | return %GetOwnProperty(obj, p); |
| 778 | } |
| 779 | |
| 780 | |
| 781 | // ES5 section 15.2.3.4. |
| 782 | function ObjectGetOwnPropertyNames(obj) { |
| 783 | obj = TO_OBJECT(obj); |
| 784 | return %GetOwnPropertyKeys(obj, PROPERTY_FILTER_SKIP_SYMBOLS); |
| 785 | } |
| 786 | |
| 787 | |
| 788 | // ES5 section 15.2.3.6. |
| 789 | function ObjectDefineProperty(obj, p, attributes) { |
| 790 | // The new pure-C++ implementation doesn't support O.o. |
| 791 | // TODO(jkummerow): Implement missing features and remove fallback path. |
| 792 | if (%IsObserved(obj)) { |
| 793 | if (!IS_RECEIVER(obj)) { |
| 794 | throw MakeTypeError(kCalledOnNonObject, "Object.defineProperty"); |
| 795 | } |
| 796 | var name = TO_NAME(p); |
| 797 | var desc = ToPropertyDescriptor(attributes); |
| 798 | DefineOwnProperty(obj, name, desc, true); |
| 799 | return obj; |
| 800 | } |
| 801 | return %ObjectDefineProperty(obj, p, attributes); |
| 802 | } |
| 803 | |
| 804 | |
| 805 | function GetOwnEnumerablePropertyNames(object) { |
| 806 | return %GetOwnPropertyKeys(object, PROPERTY_FILTER_ONLY_ENUMERABLE); |
| 807 | } |
| 808 | |
| 809 | |
| 810 | // ES5 section 15.2.3.7. |
| 811 | function ObjectDefineProperties(obj, properties) { |
| 812 | // The new pure-C++ implementation doesn't support O.o. |
| 813 | // TODO(jkummerow): Implement missing features and remove fallback path. |
| 814 | if (%IsObserved(obj)) { |
| 815 | if (!IS_RECEIVER(obj)) { |
| 816 | throw MakeTypeError(kCalledOnNonObject, "Object.defineProperties"); |
| 817 | } |
| 818 | var props = TO_OBJECT(properties); |
| 819 | var names = GetOwnEnumerablePropertyNames(props); |
| 820 | var descriptors = new InternalArray(); |
| 821 | for (var i = 0; i < names.length; i++) { |
| 822 | descriptors.push(ToPropertyDescriptor(props[names[i]])); |
| 823 | } |
| 824 | for (var i = 0; i < names.length; i++) { |
| 825 | DefineOwnProperty(obj, names[i], descriptors[i], true); |
| 826 | } |
| 827 | return obj; |
| 828 | } |
| 829 | return %ObjectDefineProperties(obj, properties); |
| 830 | } |
| 831 | |
| 832 | |
| 833 | // ES6 B.2.2.1.1 |
| 834 | function ObjectGetProto() { |
| 835 | return %_GetPrototype(TO_OBJECT(this)); |
| 836 | } |
| 837 | |
| 838 | |
| 839 | // ES6 B.2.2.1.2 |
| 840 | function ObjectSetProto(proto) { |
| 841 | CHECK_OBJECT_COERCIBLE(this, "Object.prototype.__proto__"); |
| 842 | |
| 843 | if ((IS_RECEIVER(proto) || IS_NULL(proto)) && IS_RECEIVER(this)) { |
| 844 | %SetPrototype(this, proto); |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | |
| 849 | // ES6 19.1.1.1 |
| 850 | function ObjectConstructor(x) { |
| 851 | if (GlobalObject != new.target && !IS_UNDEFINED(new.target)) { |
| 852 | return this; |
| 853 | } |
| 854 | if (IS_NULL(x) || IS_UNDEFINED(x)) return {}; |
| 855 | return TO_OBJECT(x); |
| 856 | } |
| 857 | |
| 858 | |
| 859 | // ---------------------------------------------------------------------------- |
| 860 | // Object |
| 861 | |
| 862 | %SetNativeFlag(GlobalObject); |
| 863 | %SetCode(GlobalObject, ObjectConstructor); |
| 864 | |
| 865 | %AddNamedProperty(GlobalObject.prototype, "constructor", GlobalObject, |
| 866 | DONT_ENUM); |
| 867 | |
| 868 | // Set up non-enumerable functions on the Object.prototype object. |
| 869 | utils.InstallFunctions(GlobalObject.prototype, DONT_ENUM, [ |
| 870 | "toString", ObjectToString, |
| 871 | "toLocaleString", ObjectToLocaleString, |
| 872 | "valueOf", ObjectValueOf, |
| 873 | "hasOwnProperty", ObjectHasOwnProperty, |
| 874 | "isPrototypeOf", ObjectIsPrototypeOf, |
| 875 | "propertyIsEnumerable", ObjectPropertyIsEnumerable, |
| 876 | "__defineGetter__", ObjectDefineGetter, |
| 877 | "__lookupGetter__", ObjectLookupGetter, |
| 878 | "__defineSetter__", ObjectDefineSetter, |
| 879 | "__lookupSetter__", ObjectLookupSetter |
| 880 | ]); |
| 881 | utils.InstallGetterSetter(GlobalObject.prototype, "__proto__", ObjectGetProto, |
| 882 | ObjectSetProto); |
| 883 | |
| 884 | // Set up non-enumerable functions in the Object object. |
| 885 | utils.InstallFunctions(GlobalObject, DONT_ENUM, [ |
| 886 | // assign is added in bootstrapper.cc. |
| 887 | // keys is added in bootstrapper.cc. |
| 888 | "defineProperty", ObjectDefineProperty, |
| 889 | "defineProperties", ObjectDefineProperties, |
| 890 | "getPrototypeOf", ObjectGetPrototypeOf, |
| 891 | "setPrototypeOf", ObjectSetPrototypeOf, |
| 892 | "getOwnPropertyDescriptor", ObjectGetOwnPropertyDescriptor, |
| 893 | "getOwnPropertyNames", ObjectGetOwnPropertyNames, |
| 894 | // getOwnPropertySymbols is added in symbol.js. |
| 895 | "is", SameValue, // ECMA-262, Edition 6, section 19.1.2.10 |
| 896 | // deliverChangeRecords, getNotifier, observe and unobserve are added |
| 897 | // in object-observe.js. |
| 898 | ]); |
| 899 | |
| 900 | |
| 901 | // ---------------------------------------------------------------------------- |
| 902 | // Boolean |
| 903 | |
| 904 | function BooleanConstructor(x) { |
| 905 | // TODO(bmeurer): Move this to toplevel. |
| 906 | "use strict"; |
| 907 | if (!IS_UNDEFINED(new.target)) { |
| 908 | %_SetValueOf(this, TO_BOOLEAN(x)); |
| 909 | } else { |
| 910 | return TO_BOOLEAN(x); |
| 911 | } |
| 912 | } |
| 913 | |
| 914 | |
| 915 | function BooleanToString() { |
| 916 | // NOTE: Both Boolean objects and values can enter here as |
| 917 | // 'this'. This is not as dictated by ECMA-262. |
| 918 | var b = this; |
| 919 | if (!IS_BOOLEAN(b)) { |
| 920 | if (!IS_BOOLEAN_WRAPPER(b)) { |
| 921 | throw MakeTypeError(kNotGeneric, 'Boolean.prototype.toString'); |
| 922 | } |
| 923 | b = %_ValueOf(b); |
| 924 | } |
| 925 | return b ? 'true' : 'false'; |
| 926 | } |
| 927 | |
| 928 | |
| 929 | function BooleanValueOf() { |
| 930 | // NOTE: Both Boolean objects and values can enter here as |
| 931 | // 'this'. This is not as dictated by ECMA-262. |
| 932 | if (!IS_BOOLEAN(this) && !IS_BOOLEAN_WRAPPER(this)) { |
| 933 | throw MakeTypeError(kNotGeneric, 'Boolean.prototype.valueOf'); |
| 934 | } |
| 935 | return %_ValueOf(this); |
| 936 | } |
| 937 | |
| 938 | |
| 939 | // ---------------------------------------------------------------------------- |
| 940 | |
| 941 | %SetCode(GlobalBoolean, BooleanConstructor); |
| 942 | %FunctionSetPrototype(GlobalBoolean, new GlobalBoolean(false)); |
| 943 | %AddNamedProperty(GlobalBoolean.prototype, "constructor", GlobalBoolean, |
| 944 | DONT_ENUM); |
| 945 | |
| 946 | utils.InstallFunctions(GlobalBoolean.prototype, DONT_ENUM, [ |
| 947 | "toString", BooleanToString, |
| 948 | "valueOf", BooleanValueOf |
| 949 | ]); |
| 950 | |
| 951 | |
| 952 | // ---------------------------------------------------------------------------- |
| 953 | // Number |
| 954 | |
| 955 | // ES6 Number.prototype.toString([ radix ]) |
| 956 | function NumberToStringJS(radix) { |
| 957 | // NOTE: Both Number objects and values can enter here as |
| 958 | // 'this'. This is not as dictated by ECMA-262. |
| 959 | var number = this; |
| 960 | if (!IS_NUMBER(this)) { |
| 961 | if (!IS_NUMBER_WRAPPER(this)) { |
| 962 | throw MakeTypeError(kNotGeneric, 'Number.prototype.toString'); |
| 963 | } |
| 964 | // Get the value of this number in case it's an object. |
| 965 | number = %_ValueOf(this); |
| 966 | } |
| 967 | // Fast case: Convert number in radix 10. |
| 968 | if (IS_UNDEFINED(radix) || radix === 10) { |
| 969 | return %_NumberToString(number); |
| 970 | } |
| 971 | |
| 972 | // Convert the radix to an integer and check the range. |
| 973 | radix = TO_INTEGER(radix); |
| 974 | if (radix < 2 || radix > 36) throw MakeRangeError(kToRadixFormatRange); |
| 975 | // Convert the number to a string in the given radix. |
| 976 | return %NumberToRadixString(number, radix); |
| 977 | } |
| 978 | |
| 979 | |
| 980 | // ES6 20.1.3.4 Number.prototype.toLocaleString([reserved1 [, reserved2]]) |
| 981 | function NumberToLocaleString() { |
| 982 | return %_Call(NumberToStringJS, this); |
| 983 | } |
| 984 | |
| 985 | |
| 986 | // ES6 20.1.3.7 Number.prototype.valueOf() |
| 987 | function NumberValueOf() { |
| 988 | // NOTE: Both Number objects and values can enter here as |
| 989 | // 'this'. This is not as dictated by ECMA-262. |
| 990 | if (!IS_NUMBER(this) && !IS_NUMBER_WRAPPER(this)) { |
| 991 | throw MakeTypeError(kNotGeneric, 'Number.prototype.valueOf'); |
| 992 | } |
| 993 | return %_ValueOf(this); |
| 994 | } |
| 995 | |
| 996 | |
| 997 | // ES6 20.1.3.3 Number.prototype.toFixed(fractionDigits) |
| 998 | function NumberToFixedJS(fractionDigits) { |
| 999 | var x = this; |
| 1000 | if (!IS_NUMBER(this)) { |
| 1001 | if (!IS_NUMBER_WRAPPER(this)) { |
| 1002 | throw MakeTypeError(kIncompatibleMethodReceiver, |
| 1003 | "Number.prototype.toFixed", this); |
| 1004 | } |
| 1005 | // Get the value of this number in case it's an object. |
| 1006 | x = %_ValueOf(this); |
| 1007 | } |
| 1008 | var f = TO_INTEGER(fractionDigits); |
| 1009 | |
| 1010 | if (f < 0 || f > 20) { |
| 1011 | throw MakeRangeError(kNumberFormatRange, "toFixed() digits"); |
| 1012 | } |
| 1013 | |
| 1014 | if (NUMBER_IS_NAN(x)) return "NaN"; |
| 1015 | if (x == INFINITY) return "Infinity"; |
| 1016 | if (x == -INFINITY) return "-Infinity"; |
| 1017 | |
| 1018 | return %NumberToFixed(x, f); |
| 1019 | } |
| 1020 | |
| 1021 | |
| 1022 | // ES6 20.1.3.2 Number.prototype.toExponential(fractionDigits) |
| 1023 | function NumberToExponentialJS(fractionDigits) { |
| 1024 | var x = this; |
| 1025 | if (!IS_NUMBER(this)) { |
| 1026 | if (!IS_NUMBER_WRAPPER(this)) { |
| 1027 | throw MakeTypeError(kIncompatibleMethodReceiver, |
| 1028 | "Number.prototype.toExponential", this); |
| 1029 | } |
| 1030 | // Get the value of this number in case it's an object. |
| 1031 | x = %_ValueOf(this); |
| 1032 | } |
| 1033 | var f = IS_UNDEFINED(fractionDigits) ? UNDEFINED : TO_INTEGER(fractionDigits); |
| 1034 | |
| 1035 | if (NUMBER_IS_NAN(x)) return "NaN"; |
| 1036 | if (x == INFINITY) return "Infinity"; |
| 1037 | if (x == -INFINITY) return "-Infinity"; |
| 1038 | |
| 1039 | if (IS_UNDEFINED(f)) { |
| 1040 | f = -1; // Signal for runtime function that f is not defined. |
| 1041 | } else if (f < 0 || f > 20) { |
| 1042 | throw MakeRangeError(kNumberFormatRange, "toExponential()"); |
| 1043 | } |
| 1044 | return %NumberToExponential(x, f); |
| 1045 | } |
| 1046 | |
| 1047 | |
| 1048 | // ES6 20.1.3.5 Number.prototype.toPrecision(precision) |
| 1049 | function NumberToPrecisionJS(precision) { |
| 1050 | var x = this; |
| 1051 | if (!IS_NUMBER(this)) { |
| 1052 | if (!IS_NUMBER_WRAPPER(this)) { |
| 1053 | throw MakeTypeError(kIncompatibleMethodReceiver, |
| 1054 | "Number.prototype.toPrecision", this); |
| 1055 | } |
| 1056 | // Get the value of this number in case it's an object. |
| 1057 | x = %_ValueOf(this); |
| 1058 | } |
| 1059 | if (IS_UNDEFINED(precision)) return TO_STRING(x); |
| 1060 | var p = TO_INTEGER(precision); |
| 1061 | |
| 1062 | if (NUMBER_IS_NAN(x)) return "NaN"; |
| 1063 | if (x == INFINITY) return "Infinity"; |
| 1064 | if (x == -INFINITY) return "-Infinity"; |
| 1065 | |
| 1066 | if (p < 1 || p > 21) { |
| 1067 | throw MakeRangeError(kToPrecisionFormatRange); |
| 1068 | } |
| 1069 | return %NumberToPrecision(x, p); |
| 1070 | } |
| 1071 | |
| 1072 | |
| 1073 | // Harmony isFinite. |
| 1074 | function NumberIsFinite(number) { |
| 1075 | return IS_NUMBER(number) && NUMBER_IS_FINITE(number); |
| 1076 | } |
| 1077 | |
| 1078 | |
| 1079 | // Harmony isInteger |
| 1080 | function NumberIsInteger(number) { |
| 1081 | return NumberIsFinite(number) && TO_INTEGER(number) == number; |
| 1082 | } |
| 1083 | |
| 1084 | |
| 1085 | // Harmony isNaN. |
| 1086 | function NumberIsNaN(number) { |
| 1087 | return IS_NUMBER(number) && NUMBER_IS_NAN(number); |
| 1088 | } |
| 1089 | |
| 1090 | |
| 1091 | // Harmony isSafeInteger |
| 1092 | function NumberIsSafeInteger(number) { |
| 1093 | if (NumberIsFinite(number)) { |
| 1094 | var integral = TO_INTEGER(number); |
| 1095 | if (integral == number) { |
| 1096 | return MathAbs(integral) <= kMaxSafeInteger; |
| 1097 | } |
| 1098 | } |
| 1099 | return false; |
| 1100 | } |
| 1101 | |
| 1102 | |
| 1103 | // ---------------------------------------------------------------------------- |
| 1104 | |
| 1105 | %FunctionSetPrototype(GlobalNumber, new GlobalNumber(0)); |
| 1106 | |
| 1107 | %OptimizeObjectForAddingMultipleProperties(GlobalNumber.prototype, 8); |
| 1108 | // Set up the constructor property on the Number prototype object. |
| 1109 | %AddNamedProperty(GlobalNumber.prototype, "constructor", GlobalNumber, |
| 1110 | DONT_ENUM); |
| 1111 | |
| 1112 | utils.InstallConstants(GlobalNumber, [ |
| 1113 | // ECMA-262 section 15.7.3.1. |
| 1114 | "MAX_VALUE", 1.7976931348623157e+308, |
| 1115 | // ECMA-262 section 15.7.3.2. |
| 1116 | "MIN_VALUE", 5e-324, |
| 1117 | // ECMA-262 section 15.7.3.3. |
| 1118 | "NaN", NaN, |
| 1119 | // ECMA-262 section 15.7.3.4. |
| 1120 | "NEGATIVE_INFINITY", -INFINITY, |
| 1121 | // ECMA-262 section 15.7.3.5. |
| 1122 | "POSITIVE_INFINITY", INFINITY, |
| 1123 | |
| 1124 | // --- Harmony constants (no spec refs until settled.) |
| 1125 | |
| 1126 | "MAX_SAFE_INTEGER", %_MathPow(2, 53) - 1, |
| 1127 | "MIN_SAFE_INTEGER", -%_MathPow(2, 53) + 1, |
| 1128 | "EPSILON", %_MathPow(2, -52) |
| 1129 | ]); |
| 1130 | |
| 1131 | // Set up non-enumerable functions on the Number prototype object. |
| 1132 | utils.InstallFunctions(GlobalNumber.prototype, DONT_ENUM, [ |
| 1133 | "toString", NumberToStringJS, |
| 1134 | "toLocaleString", NumberToLocaleString, |
| 1135 | "valueOf", NumberValueOf, |
| 1136 | "toFixed", NumberToFixedJS, |
| 1137 | "toExponential", NumberToExponentialJS, |
| 1138 | "toPrecision", NumberToPrecisionJS |
| 1139 | ]); |
| 1140 | |
| 1141 | // Harmony Number constructor additions |
| 1142 | utils.InstallFunctions(GlobalNumber, DONT_ENUM, [ |
| 1143 | "isFinite", NumberIsFinite, |
| 1144 | "isInteger", NumberIsInteger, |
| 1145 | "isNaN", NumberIsNaN, |
| 1146 | "isSafeInteger", NumberIsSafeInteger, |
| 1147 | "parseInt", GlobalParseInt, |
| 1148 | "parseFloat", GlobalParseFloat |
| 1149 | ]); |
| 1150 | |
| 1151 | %SetForceInlineFlag(NumberIsNaN); |
| 1152 | |
| 1153 | |
| 1154 | // ---------------------------------------------------------------------------- |
| 1155 | // Iterator related spec functions. |
| 1156 | |
| 1157 | // ES6 7.4.1 GetIterator(obj, method) |
| 1158 | function GetIterator(obj, method) { |
| 1159 | if (IS_UNDEFINED(method)) { |
| 1160 | method = obj[iteratorSymbol]; |
| 1161 | } |
| 1162 | if (!IS_CALLABLE(method)) { |
| 1163 | throw MakeTypeError(kNotIterable, obj); |
| 1164 | } |
| 1165 | var iterator = %_Call(method, obj); |
| 1166 | if (!IS_RECEIVER(iterator)) { |
| 1167 | throw MakeTypeError(kNotAnIterator, iterator); |
| 1168 | } |
| 1169 | return iterator; |
| 1170 | } |
| 1171 | |
| 1172 | // ---------------------------------------------------------------------------- |
| 1173 | // Exports |
| 1174 | |
| 1175 | utils.Export(function(to) { |
| 1176 | to.GetIterator = GetIterator; |
| 1177 | to.GetMethod = GetMethod; |
| 1178 | to.IsFinite = GlobalIsFinite; |
| 1179 | to.IsNaN = GlobalIsNaN; |
| 1180 | to.NumberIsNaN = NumberIsNaN; |
| 1181 | to.ObjectDefineProperties = ObjectDefineProperties; |
| 1182 | to.ObjectDefineProperty = ObjectDefineProperty; |
| 1183 | to.ObjectHasOwnProperty = ObjectHasOwnProperty; |
| 1184 | }); |
| 1185 | |
| 1186 | %InstallToContext([ |
| 1187 | "object_value_of", ObjectValueOf, |
| 1188 | ]); |
| 1189 | |
| 1190 | }) |