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| 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 FLAG_harmony_tostring; | |
| 13 var GlobalArray = global.Array; | |
| 14 var GlobalBoolean = global.Boolean; | |
| 15 var GlobalFunction = global.Function; | |
| 16 var GlobalNumber = global.Number; | |
| 17 var GlobalObject = global.Object; | |
| 18 var InternalArray = utils.InternalArray; | |
| 19 var iteratorSymbol = utils.ImportNow("iterator_symbol"); | |
| 20 var MathAbs; | |
| 21 var ProxyDelegateCallAndConstruct; | |
| 22 var ProxyDerivedHasOwnTrap; | |
| 23 var ProxyDerivedKeysTrap; | |
| 24 var StringIndexOf; | |
| 25 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol"); | |
| 26 | |
| 27 utils.Import(function(from) { | |
| 28 MathAbs = from.MathAbs; | |
| 29 StringIndexOf = from.StringIndexOf; | |
| 30 }); | |
| 31 | |
| 32 utils.ImportFromExperimental(function(from) { | |
| 33 FLAG_harmony_tostring = from.FLAG_harmony_tostring; | |
| 34 ProxyDelegateCallAndConstruct = from.ProxyDelegateCallAndConstruct; | |
| 35 ProxyDerivedHasOwnTrap = from.ProxyDerivedHasOwnTrap; | |
| 36 ProxyDerivedKeysTrap = from.ProxyDerivedKeysTrap; | |
| 37 }); | |
| 38 | |
| 39 // ---------------------------------------------------------------------------- | |
| 40 | |
| 41 | |
| 42 // ECMA 262 - 15.1.4 | |
| 43 function GlobalIsNaN(number) { | |
| 44 number = TO_NUMBER(number); | |
| 45 return NUMBER_IS_NAN(number); | |
| 46 } | |
| 47 | |
| 48 | |
| 49 // ECMA 262 - 15.1.5 | |
| 50 function GlobalIsFinite(number) { | |
| 51 number = TO_NUMBER(number); | |
| 52 return NUMBER_IS_FINITE(number); | |
| 53 } | |
| 54 | |
| 55 | |
| 56 // ECMA-262 - 15.1.2.2 | |
| 57 function GlobalParseInt(string, radix) { | |
| 58 if (IS_UNDEFINED(radix) || radix === 10 || radix === 0) { | |
| 59 // Some people use parseInt instead of Math.floor. This | |
| 60 // optimization makes parseInt on a Smi 12 times faster (60ns | |
| 61 // vs 800ns). The following optimization makes parseInt on a | |
| 62 // non-Smi number 9 times faster (230ns vs 2070ns). Together | |
| 63 // they make parseInt on a string 1.4% slower (274ns vs 270ns). | |
| 64 if (%_IsSmi(string)) return string; | |
| 65 if (IS_NUMBER(string) && | |
| 66 ((0.01 < string && string < 1e9) || | |
| 67 (-1e9 < string && string < -0.01))) { | |
| 68 // Truncate number. | |
| 69 return string | 0; | |
| 70 } | |
| 71 string = TO_STRING(string); | |
| 72 radix = radix | 0; | |
| 73 } else { | |
| 74 // The spec says ToString should be evaluated before ToInt32. | |
| 75 string = TO_STRING(string); | |
| 76 radix = TO_INT32(radix); | |
| 77 if (!(radix == 0 || (2 <= radix && radix <= 36))) { | |
| 78 return NAN; | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 if (%_HasCachedArrayIndex(string) && | |
| 83 (radix == 0 || radix == 10)) { | |
| 84 return %_GetCachedArrayIndex(string); | |
| 85 } | |
| 86 return %StringParseInt(string, radix); | |
| 87 } | |
| 88 | |
| 89 | |
| 90 // ECMA-262 - 15.1.2.3 | |
| 91 function GlobalParseFloat(string) { | |
| 92 string = TO_STRING(string); | |
| 93 if (%_HasCachedArrayIndex(string)) return %_GetCachedArrayIndex(string); | |
| 94 return %StringParseFloat(string); | |
| 95 } | |
| 96 | |
| 97 | |
| 98 function GlobalEval(x) { | |
| 99 if (!IS_STRING(x)) return x; | |
| 100 | |
| 101 var global_proxy = %GlobalProxy(GlobalEval); | |
| 102 | |
| 103 var f = %CompileString(x, false); | |
| 104 if (!IS_FUNCTION(f)) return f; | |
| 105 | |
| 106 return %_CallFunction(global_proxy, f); | |
| 107 } | |
| 108 | |
| 109 | |
| 110 // ---------------------------------------------------------------------------- | |
| 111 | |
| 112 // Set up global object. | |
| 113 var attributes = DONT_ENUM | DONT_DELETE | READ_ONLY; | |
| 114 | |
| 115 utils.InstallConstants(global, [ | |
| 116 // ECMA 262 - 15.1.1.1. | |
| 117 "NaN", NAN, | |
| 118 // ECMA-262 - 15.1.1.2. | |
| 119 "Infinity", INFINITY, | |
| 120 // ECMA-262 - 15.1.1.2. | |
| 121 "undefined", UNDEFINED, | |
| 122 ]); | |
| 123 | |
| 124 // Set up non-enumerable function on the global object. | |
| 125 utils.InstallFunctions(global, DONT_ENUM, [ | |
| 126 "isNaN", GlobalIsNaN, | |
| 127 "isFinite", GlobalIsFinite, | |
| 128 "parseInt", GlobalParseInt, | |
| 129 "parseFloat", GlobalParseFloat, | |
| 130 "eval", GlobalEval | |
| 131 ]); | |
| 132 | |
| 133 | |
| 134 // ---------------------------------------------------------------------------- | |
| 135 // Object | |
| 136 | |
| 137 // ECMA-262 - 15.2.4.2 | |
| 138 function ObjectToString() { | |
| 139 if (IS_UNDEFINED(this)) return "[object Undefined]"; | |
| 140 if (IS_NULL(this)) return "[object Null]"; | |
| 141 var O = TO_OBJECT(this); | |
| 142 var builtinTag = %_ClassOf(O); | |
| 143 var tag; | |
| 144 | |
| 145 // TODO(caitp): cannot wait to get rid of this flag :> | |
| 146 if (FLAG_harmony_tostring) { | |
| 147 tag = O[toStringTagSymbol]; | |
| 148 if (!IS_STRING(tag)) { | |
| 149 tag = builtinTag; | |
| 150 } | |
| 151 } else { | |
| 152 tag = builtinTag; | |
| 153 } | |
| 154 | |
| 155 return `[object ${tag}]`; | |
| 156 } | |
| 157 | |
| 158 | |
| 159 // ECMA-262 - 15.2.4.3 | |
| 160 function ObjectToLocaleString() { | |
| 161 CHECK_OBJECT_COERCIBLE(this, "Object.prototype.toLocaleString"); | |
| 162 return this.toString(); | |
| 163 } | |
| 164 | |
| 165 | |
| 166 // ECMA-262 - 15.2.4.4 | |
| 167 function ObjectValueOf() { | |
| 168 return TO_OBJECT(this); | |
| 169 } | |
| 170 | |
| 171 | |
| 172 // ECMA-262 - 15.2.4.5 | |
| 173 function ObjectHasOwnProperty(value) { | |
| 174 var name = TO_NAME(value); | |
| 175 var object = TO_OBJECT(this); | |
| 176 | |
| 177 if (%_IsJSProxy(object)) { | |
| 178 // TODO(rossberg): adjust once there is a story for symbols vs proxies. | |
| 179 if (IS_SYMBOL(value)) return false; | |
| 180 | |
| 181 var handler = %GetHandler(object); | |
| 182 return CallTrap1(handler, "hasOwn", ProxyDerivedHasOwnTrap, name); | |
| 183 } | |
| 184 return %HasOwnProperty(object, name); | |
| 185 } | |
| 186 | |
| 187 | |
| 188 // ECMA-262 - 15.2.4.6 | |
| 189 function ObjectIsPrototypeOf(V) { | |
| 190 if (!IS_SPEC_OBJECT(V)) return false; | |
| 191 var O = TO_OBJECT(this); | |
| 192 return %_HasInPrototypeChain(V, O); | |
| 193 } | |
| 194 | |
| 195 | |
| 196 // ECMA-262 - 15.2.4.6 | |
| 197 function ObjectPropertyIsEnumerable(V) { | |
| 198 var P = TO_NAME(V); | |
| 199 if (%_IsJSProxy(this)) { | |
| 200 // TODO(rossberg): adjust once there is a story for symbols vs proxies. | |
| 201 if (IS_SYMBOL(V)) return false; | |
| 202 | |
| 203 var desc = GetOwnPropertyJS(this, P); | |
| 204 return IS_UNDEFINED(desc) ? false : desc.isEnumerable(); | |
| 205 } | |
| 206 return %IsPropertyEnumerable(TO_OBJECT(this), P); | |
| 207 } | |
| 208 | |
| 209 | |
| 210 // Extensions for providing property getters and setters. | |
| 211 function ObjectDefineGetter(name, fun) { | |
| 212 var receiver = this; | |
| 213 if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { | |
| 214 receiver = %GlobalProxy(ObjectDefineGetter); | |
| 215 } | |
| 216 if (!IS_CALLABLE(fun)) { | |
| 217 throw MakeTypeError(kObjectGetterExpectingFunction); | |
| 218 } | |
| 219 var desc = new PropertyDescriptor(); | |
| 220 desc.setGet(fun); | |
| 221 desc.setEnumerable(true); | |
| 222 desc.setConfigurable(true); | |
| 223 DefineOwnProperty(TO_OBJECT(receiver), TO_NAME(name), desc, false); | |
| 224 } | |
| 225 | |
| 226 | |
| 227 function ObjectLookupGetter(name) { | |
| 228 var receiver = this; | |
| 229 if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { | |
| 230 receiver = %GlobalProxy(ObjectLookupGetter); | |
| 231 } | |
| 232 return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), GETTER); | |
| 233 } | |
| 234 | |
| 235 | |
| 236 function ObjectDefineSetter(name, fun) { | |
| 237 var receiver = this; | |
| 238 if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { | |
| 239 receiver = %GlobalProxy(ObjectDefineSetter); | |
| 240 } | |
| 241 if (!IS_CALLABLE(fun)) { | |
| 242 throw MakeTypeError(kObjectSetterExpectingFunction); | |
| 243 } | |
| 244 var desc = new PropertyDescriptor(); | |
| 245 desc.setSet(fun); | |
| 246 desc.setEnumerable(true); | |
| 247 desc.setConfigurable(true); | |
| 248 DefineOwnProperty(TO_OBJECT(receiver), TO_NAME(name), desc, false); | |
| 249 } | |
| 250 | |
| 251 | |
| 252 function ObjectLookupSetter(name) { | |
| 253 var receiver = this; | |
| 254 if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { | |
| 255 receiver = %GlobalProxy(ObjectLookupSetter); | |
| 256 } | |
| 257 return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), SETTER); | |
| 258 } | |
| 259 | |
| 260 | |
| 261 function ObjectKeys(obj) { | |
| 262 obj = TO_OBJECT(obj); | |
| 263 if (%_IsJSProxy(obj)) { | |
| 264 var handler = %GetHandler(obj); | |
| 265 var names = CallTrap0(handler, "keys", ProxyDerivedKeysTrap); | |
| 266 return ToNameArray(names, "keys", false); | |
| 267 } | |
| 268 return %OwnKeys(obj); | |
| 269 } | |
| 270 | |
| 271 | |
| 272 // ES5 8.10.1. | |
| 273 function IsAccessorDescriptor(desc) { | |
| 274 if (IS_UNDEFINED(desc)) return false; | |
| 275 return desc.hasGetter() || desc.hasSetter(); | |
| 276 } | |
| 277 | |
| 278 | |
| 279 // ES5 8.10.2. | |
| 280 function IsDataDescriptor(desc) { | |
| 281 if (IS_UNDEFINED(desc)) return false; | |
| 282 return desc.hasValue() || desc.hasWritable(); | |
| 283 } | |
| 284 | |
| 285 | |
| 286 // ES5 8.10.3. | |
| 287 function IsGenericDescriptor(desc) { | |
| 288 if (IS_UNDEFINED(desc)) return false; | |
| 289 return !(IsAccessorDescriptor(desc) || IsDataDescriptor(desc)); | |
| 290 } | |
| 291 | |
| 292 | |
| 293 function IsInconsistentDescriptor(desc) { | |
| 294 return IsAccessorDescriptor(desc) && IsDataDescriptor(desc); | |
| 295 } | |
| 296 | |
| 297 | |
| 298 // ES5 8.10.4 | |
| 299 function FromPropertyDescriptor(desc) { | |
| 300 if (IS_UNDEFINED(desc)) return desc; | |
| 301 | |
| 302 if (IsDataDescriptor(desc)) { | |
| 303 return { value: desc.getValue(), | |
| 304 writable: desc.isWritable(), | |
| 305 enumerable: desc.isEnumerable(), | |
| 306 configurable: desc.isConfigurable() }; | |
| 307 } | |
| 308 // Must be an AccessorDescriptor then. We never return a generic descriptor. | |
| 309 return { get: desc.getGet(), | |
| 310 set: desc.getSet(), | |
| 311 enumerable: desc.isEnumerable(), | |
| 312 configurable: desc.isConfigurable() }; | |
| 313 } | |
| 314 | |
| 315 | |
| 316 // Harmony Proxies | |
| 317 function FromGenericPropertyDescriptor(desc) { | |
| 318 if (IS_UNDEFINED(desc)) return desc; | |
| 319 var obj = new GlobalObject(); | |
| 320 | |
| 321 if (desc.hasValue()) { | |
| 322 %AddNamedProperty(obj, "value", desc.getValue(), NONE); | |
| 323 } | |
| 324 if (desc.hasWritable()) { | |
| 325 %AddNamedProperty(obj, "writable", desc.isWritable(), NONE); | |
| 326 } | |
| 327 if (desc.hasGetter()) { | |
| 328 %AddNamedProperty(obj, "get", desc.getGet(), NONE); | |
| 329 } | |
| 330 if (desc.hasSetter()) { | |
| 331 %AddNamedProperty(obj, "set", desc.getSet(), NONE); | |
| 332 } | |
| 333 if (desc.hasEnumerable()) { | |
| 334 %AddNamedProperty(obj, "enumerable", desc.isEnumerable(), NONE); | |
| 335 } | |
| 336 if (desc.hasConfigurable()) { | |
| 337 %AddNamedProperty(obj, "configurable", desc.isConfigurable(), NONE); | |
| 338 } | |
| 339 return obj; | |
| 340 } | |
| 341 | |
| 342 | |
| 343 // ES5 8.10.5. | |
| 344 function ToPropertyDescriptor(obj) { | |
| 345 if (!IS_SPEC_OBJECT(obj)) throw MakeTypeError(kPropertyDescObject, obj); | |
| 346 | |
| 347 var desc = new PropertyDescriptor(); | |
| 348 | |
| 349 if ("enumerable" in obj) { | |
| 350 desc.setEnumerable(TO_BOOLEAN(obj.enumerable)); | |
| 351 } | |
| 352 | |
| 353 if ("configurable" in obj) { | |
| 354 desc.setConfigurable(TO_BOOLEAN(obj.configurable)); | |
| 355 } | |
| 356 | |
| 357 if ("value" in obj) { | |
| 358 desc.setValue(obj.value); | |
| 359 } | |
| 360 | |
| 361 if ("writable" in obj) { | |
| 362 desc.setWritable(TO_BOOLEAN(obj.writable)); | |
| 363 } | |
| 364 | |
| 365 if ("get" in obj) { | |
| 366 var get = obj.get; | |
| 367 if (!IS_UNDEFINED(get) && !IS_CALLABLE(get)) { | |
| 368 throw MakeTypeError(kObjectGetterCallable, get); | |
| 369 } | |
| 370 desc.setGet(get); | |
| 371 } | |
| 372 | |
| 373 if ("set" in obj) { | |
| 374 var set = obj.set; | |
| 375 if (!IS_UNDEFINED(set) && !IS_CALLABLE(set)) { | |
| 376 throw MakeTypeError(kObjectSetterCallable, set); | |
| 377 } | |
| 378 desc.setSet(set); | |
| 379 } | |
| 380 | |
| 381 if (IsInconsistentDescriptor(desc)) { | |
| 382 throw MakeTypeError(kValueAndAccessor, obj); | |
| 383 } | |
| 384 return desc; | |
| 385 } | |
| 386 | |
| 387 | |
| 388 // For Harmony proxies. | |
| 389 function ToCompletePropertyDescriptor(obj) { | |
| 390 var desc = ToPropertyDescriptor(obj); | |
| 391 if (IsGenericDescriptor(desc) || IsDataDescriptor(desc)) { | |
| 392 if (!desc.hasValue()) desc.setValue(UNDEFINED); | |
| 393 if (!desc.hasWritable()) desc.setWritable(false); | |
| 394 } else { | |
| 395 // Is accessor descriptor. | |
| 396 if (!desc.hasGetter()) desc.setGet(UNDEFINED); | |
| 397 if (!desc.hasSetter()) desc.setSet(UNDEFINED); | |
| 398 } | |
| 399 if (!desc.hasEnumerable()) desc.setEnumerable(false); | |
| 400 if (!desc.hasConfigurable()) desc.setConfigurable(false); | |
| 401 return desc; | |
| 402 } | |
| 403 | |
| 404 | |
| 405 function PropertyDescriptor() { | |
| 406 // Initialize here so they are all in-object and have the same map. | |
| 407 // Default values from ES5 8.6.1. | |
| 408 this.value_ = UNDEFINED; | |
| 409 this.hasValue_ = false; | |
| 410 this.writable_ = false; | |
| 411 this.hasWritable_ = false; | |
| 412 this.enumerable_ = false; | |
| 413 this.hasEnumerable_ = false; | |
| 414 this.configurable_ = false; | |
| 415 this.hasConfigurable_ = false; | |
| 416 this.get_ = UNDEFINED; | |
| 417 this.hasGetter_ = false; | |
| 418 this.set_ = UNDEFINED; | |
| 419 this.hasSetter_ = false; | |
| 420 } | |
| 421 | |
| 422 utils.SetUpLockedPrototype(PropertyDescriptor, [ | |
| 423 "value_", | |
| 424 "hasValue_", | |
| 425 "writable_", | |
| 426 "hasWritable_", | |
| 427 "enumerable_", | |
| 428 "hasEnumerable_", | |
| 429 "configurable_", | |
| 430 "hasConfigurable_", | |
| 431 "get_", | |
| 432 "hasGetter_", | |
| 433 "set_", | |
| 434 "hasSetter_" | |
| 435 ], [ | |
| 436 "toString", function PropertyDescriptor_ToString() { | |
| 437 return "[object PropertyDescriptor]"; | |
| 438 }, | |
| 439 "setValue", function PropertyDescriptor_SetValue(value) { | |
| 440 this.value_ = value; | |
| 441 this.hasValue_ = true; | |
| 442 }, | |
| 443 "getValue", function PropertyDescriptor_GetValue() { | |
| 444 return this.value_; | |
| 445 }, | |
| 446 "hasValue", function PropertyDescriptor_HasValue() { | |
| 447 return this.hasValue_; | |
| 448 }, | |
| 449 "setEnumerable", function PropertyDescriptor_SetEnumerable(enumerable) { | |
| 450 this.enumerable_ = enumerable; | |
| 451 this.hasEnumerable_ = true; | |
| 452 }, | |
| 453 "isEnumerable", function PropertyDescriptor_IsEnumerable() { | |
| 454 return this.enumerable_; | |
| 455 }, | |
| 456 "hasEnumerable", function PropertyDescriptor_HasEnumerable() { | |
| 457 return this.hasEnumerable_; | |
| 458 }, | |
| 459 "setWritable", function PropertyDescriptor_SetWritable(writable) { | |
| 460 this.writable_ = writable; | |
| 461 this.hasWritable_ = true; | |
| 462 }, | |
| 463 "isWritable", function PropertyDescriptor_IsWritable() { | |
| 464 return this.writable_; | |
| 465 }, | |
| 466 "hasWritable", function PropertyDescriptor_HasWritable() { | |
| 467 return this.hasWritable_; | |
| 468 }, | |
| 469 "setConfigurable", | |
| 470 function PropertyDescriptor_SetConfigurable(configurable) { | |
| 471 this.configurable_ = configurable; | |
| 472 this.hasConfigurable_ = true; | |
| 473 }, | |
| 474 "hasConfigurable", function PropertyDescriptor_HasConfigurable() { | |
| 475 return this.hasConfigurable_; | |
| 476 }, | |
| 477 "isConfigurable", function PropertyDescriptor_IsConfigurable() { | |
| 478 return this.configurable_; | |
| 479 }, | |
| 480 "setGet", function PropertyDescriptor_SetGetter(get) { | |
| 481 this.get_ = get; | |
| 482 this.hasGetter_ = true; | |
| 483 }, | |
| 484 "getGet", function PropertyDescriptor_GetGetter() { | |
| 485 return this.get_; | |
| 486 }, | |
| 487 "hasGetter", function PropertyDescriptor_HasGetter() { | |
| 488 return this.hasGetter_; | |
| 489 }, | |
| 490 "setSet", function PropertyDescriptor_SetSetter(set) { | |
| 491 this.set_ = set; | |
| 492 this.hasSetter_ = true; | |
| 493 }, | |
| 494 "getSet", function PropertyDescriptor_GetSetter() { | |
| 495 return this.set_; | |
| 496 }, | |
| 497 "hasSetter", function PropertyDescriptor_HasSetter() { | |
| 498 return this.hasSetter_; | |
| 499 } | |
| 500 ]); | |
| 501 | |
| 502 | |
| 503 // Converts an array returned from Runtime_GetOwnProperty to an actual | |
| 504 // property descriptor. For a description of the array layout please | |
| 505 // see the runtime.cc file. | |
| 506 function ConvertDescriptorArrayToDescriptor(desc_array) { | |
| 507 if (IS_UNDEFINED(desc_array)) { | |
| 508 return UNDEFINED; | |
| 509 } | |
| 510 | |
| 511 var desc = new PropertyDescriptor(); | |
| 512 // This is an accessor. | |
| 513 if (desc_array[IS_ACCESSOR_INDEX]) { | |
| 514 desc.setGet(desc_array[GETTER_INDEX]); | |
| 515 desc.setSet(desc_array[SETTER_INDEX]); | |
| 516 } else { | |
| 517 desc.setValue(desc_array[VALUE_INDEX]); | |
| 518 desc.setWritable(desc_array[WRITABLE_INDEX]); | |
| 519 } | |
| 520 desc.setEnumerable(desc_array[ENUMERABLE_INDEX]); | |
| 521 desc.setConfigurable(desc_array[CONFIGURABLE_INDEX]); | |
| 522 | |
| 523 return desc; | |
| 524 } | |
| 525 | |
| 526 | |
| 527 // For Harmony proxies. | |
| 528 function GetTrap(handler, name, defaultTrap) { | |
| 529 var trap = handler[name]; | |
| 530 if (IS_UNDEFINED(trap)) { | |
| 531 if (IS_UNDEFINED(defaultTrap)) { | |
| 532 throw MakeTypeError(kProxyHandlerTrapMissing, handler, name); | |
| 533 } | |
| 534 trap = defaultTrap; | |
| 535 } else if (!IS_CALLABLE(trap)) { | |
| 536 throw MakeTypeError(kProxyHandlerTrapMustBeCallable, handler, name); | |
| 537 } | |
| 538 return trap; | |
| 539 } | |
| 540 | |
| 541 | |
| 542 function CallTrap0(handler, name, defaultTrap) { | |
| 543 return %_CallFunction(handler, GetTrap(handler, name, defaultTrap)); | |
| 544 } | |
| 545 | |
| 546 | |
| 547 function CallTrap1(handler, name, defaultTrap, x) { | |
| 548 return %_CallFunction(handler, x, GetTrap(handler, name, defaultTrap)); | |
| 549 } | |
| 550 | |
| 551 | |
| 552 function CallTrap2(handler, name, defaultTrap, x, y) { | |
| 553 return %_CallFunction(handler, x, y, GetTrap(handler, name, defaultTrap)); | |
| 554 } | |
| 555 | |
| 556 | |
| 557 // ES5 section 8.12.1. | |
| 558 function GetOwnPropertyJS(obj, v) { | |
| 559 var p = TO_NAME(v); | |
| 560 if (%_IsJSProxy(obj)) { | |
| 561 // TODO(rossberg): adjust once there is a story for symbols vs proxies. | |
| 562 if (IS_SYMBOL(v)) return UNDEFINED; | |
| 563 | |
| 564 var handler = %GetHandler(obj); | |
| 565 var descriptor = CallTrap1( | |
| 566 handler, "getOwnPropertyDescriptor", UNDEFINED, p); | |
| 567 if (IS_UNDEFINED(descriptor)) return descriptor; | |
| 568 var desc = ToCompletePropertyDescriptor(descriptor); | |
| 569 if (!desc.isConfigurable()) { | |
| 570 throw MakeTypeError(kProxyPropNotConfigurable, | |
| 571 handler, p, "getOwnPropertyDescriptor"); | |
| 572 } | |
| 573 return desc; | |
| 574 } | |
| 575 | |
| 576 // GetOwnProperty returns an array indexed by the constants | |
| 577 // defined in macros.py. | |
| 578 // If p is not a property on obj undefined is returned. | |
| 579 var props = %GetOwnProperty(TO_OBJECT(obj), p); | |
| 580 | |
| 581 return ConvertDescriptorArrayToDescriptor(props); | |
| 582 } | |
| 583 | |
| 584 | |
| 585 // ES5 section 8.12.7. | |
| 586 function Delete(obj, p, should_throw) { | |
| 587 var desc = GetOwnPropertyJS(obj, p); | |
| 588 if (IS_UNDEFINED(desc)) return true; | |
| 589 if (desc.isConfigurable()) { | |
| 590 %DeleteProperty_Sloppy(obj, p); | |
| 591 return true; | |
| 592 } else if (should_throw) { | |
| 593 throw MakeTypeError(kDefineDisallowed, p); | |
| 594 } else { | |
| 595 return; | |
| 596 } | |
| 597 } | |
| 598 | |
| 599 | |
| 600 // ES6, draft 12-24-14, section 7.3.8 | |
| 601 function GetMethod(obj, p) { | |
| 602 var func = obj[p]; | |
| 603 if (IS_NULL_OR_UNDEFINED(func)) return UNDEFINED; | |
| 604 if (IS_CALLABLE(func)) return func; | |
| 605 throw MakeTypeError(kCalledNonCallable, typeof func); | |
| 606 } | |
| 607 | |
| 608 | |
| 609 // Harmony proxies. | |
| 610 function DefineProxyProperty(obj, p, attributes, should_throw) { | |
| 611 // TODO(rossberg): adjust once there is a story for symbols vs proxies. | |
| 612 if (IS_SYMBOL(p)) return false; | |
| 613 | |
| 614 var handler = %GetHandler(obj); | |
| 615 var result = CallTrap2(handler, "defineProperty", UNDEFINED, p, attributes); | |
| 616 if (!result) { | |
| 617 if (should_throw) { | |
| 618 throw MakeTypeError(kProxyHandlerReturned, | |
| 619 handler, "false", "defineProperty"); | |
| 620 } else { | |
| 621 return false; | |
| 622 } | |
| 623 } | |
| 624 return true; | |
| 625 } | |
| 626 | |
| 627 | |
| 628 // ES5 8.12.9. | |
| 629 function DefineObjectProperty(obj, p, desc, should_throw) { | |
| 630 var current_array = %GetOwnProperty(obj, TO_NAME(p)); | |
| 631 var current = ConvertDescriptorArrayToDescriptor(current_array); | |
| 632 var extensible = %IsExtensible(obj); | |
| 633 | |
| 634 // Error handling according to spec. | |
| 635 // Step 3 | |
| 636 if (IS_UNDEFINED(current) && !extensible) { | |
| 637 if (should_throw) { | |
| 638 throw MakeTypeError(kDefineDisallowed, p); | |
| 639 } else { | |
| 640 return false; | |
| 641 } | |
| 642 } | |
| 643 | |
| 644 if (!IS_UNDEFINED(current)) { | |
| 645 // Step 5 and 6 | |
| 646 if ((IsGenericDescriptor(desc) || | |
| 647 IsDataDescriptor(desc) == IsDataDescriptor(current)) && | |
| 648 (!desc.hasEnumerable() || | |
| 649 $sameValue(desc.isEnumerable(), current.isEnumerable())) && | |
| 650 (!desc.hasConfigurable() || | |
| 651 $sameValue(desc.isConfigurable(), current.isConfigurable())) && | |
| 652 (!desc.hasWritable() || | |
| 653 $sameValue(desc.isWritable(), current.isWritable())) && | |
| 654 (!desc.hasValue() || | |
| 655 $sameValue(desc.getValue(), current.getValue())) && | |
| 656 (!desc.hasGetter() || | |
| 657 $sameValue(desc.getGet(), current.getGet())) && | |
| 658 (!desc.hasSetter() || | |
| 659 $sameValue(desc.getSet(), current.getSet()))) { | |
| 660 return true; | |
| 661 } | |
| 662 if (!current.isConfigurable()) { | |
| 663 // Step 7 | |
| 664 if (desc.isConfigurable() || | |
| 665 (desc.hasEnumerable() && | |
| 666 desc.isEnumerable() != current.isEnumerable())) { | |
| 667 if (should_throw) { | |
| 668 throw MakeTypeError(kRedefineDisallowed, p); | |
| 669 } else { | |
| 670 return false; | |
| 671 } | |
| 672 } | |
| 673 // Step 8 | |
| 674 if (!IsGenericDescriptor(desc)) { | |
| 675 // Step 9a | |
| 676 if (IsDataDescriptor(current) != IsDataDescriptor(desc)) { | |
| 677 if (should_throw) { | |
| 678 throw MakeTypeError(kRedefineDisallowed, p); | |
| 679 } else { | |
| 680 return false; | |
| 681 } | |
| 682 } | |
| 683 // Step 10a | |
| 684 if (IsDataDescriptor(current) && IsDataDescriptor(desc)) { | |
| 685 var currentIsWritable = current.isWritable(); | |
| 686 if (currentIsWritable != desc.isWritable()) { | |
| 687 if (!currentIsWritable || IS_STRONG(obj)) { | |
| 688 if (should_throw) { | |
| 689 throw currentIsWritable | |
| 690 ? MakeTypeError(kStrongRedefineDisallowed, obj, p) | |
| 691 : MakeTypeError(kRedefineDisallowed, p); | |
| 692 } else { | |
| 693 return false; | |
| 694 } | |
| 695 } | |
| 696 } | |
| 697 if (!currentIsWritable && desc.hasValue() && | |
| 698 !$sameValue(desc.getValue(), current.getValue())) { | |
| 699 if (should_throw) { | |
| 700 throw MakeTypeError(kRedefineDisallowed, p); | |
| 701 } else { | |
| 702 return false; | |
| 703 } | |
| 704 } | |
| 705 } | |
| 706 // Step 11 | |
| 707 if (IsAccessorDescriptor(desc) && IsAccessorDescriptor(current)) { | |
| 708 if (desc.hasSetter() && | |
| 709 !$sameValue(desc.getSet(), current.getSet())) { | |
| 710 if (should_throw) { | |
| 711 throw MakeTypeError(kRedefineDisallowed, p); | |
| 712 } else { | |
| 713 return false; | |
| 714 } | |
| 715 } | |
| 716 if (desc.hasGetter() && !$sameValue(desc.getGet(),current.getGet())) { | |
| 717 if (should_throw) { | |
| 718 throw MakeTypeError(kRedefineDisallowed, p); | |
| 719 } else { | |
| 720 return false; | |
| 721 } | |
| 722 } | |
| 723 } | |
| 724 } | |
| 725 } | |
| 726 } | |
| 727 | |
| 728 // Send flags - enumerable and configurable are common - writable is | |
| 729 // only send to the data descriptor. | |
| 730 // Take special care if enumerable and configurable is not defined on | |
| 731 // desc (we need to preserve the existing values from current). | |
| 732 var flag = NONE; | |
| 733 if (desc.hasEnumerable()) { | |
| 734 flag |= desc.isEnumerable() ? 0 : DONT_ENUM; | |
| 735 } else if (!IS_UNDEFINED(current)) { | |
| 736 flag |= current.isEnumerable() ? 0 : DONT_ENUM; | |
| 737 } else { | |
| 738 flag |= DONT_ENUM; | |
| 739 } | |
| 740 | |
| 741 if (desc.hasConfigurable()) { | |
| 742 flag |= desc.isConfigurable() ? 0 : DONT_DELETE; | |
| 743 } else if (!IS_UNDEFINED(current)) { | |
| 744 flag |= current.isConfigurable() ? 0 : DONT_DELETE; | |
| 745 } else | |
| 746 flag |= DONT_DELETE; | |
| 747 | |
| 748 if (IsDataDescriptor(desc) || | |
| 749 (IsGenericDescriptor(desc) && | |
| 750 (IS_UNDEFINED(current) || IsDataDescriptor(current)))) { | |
| 751 // There are 3 cases that lead here: | |
| 752 // Step 4a - defining a new data property. | |
| 753 // Steps 9b & 12 - replacing an existing accessor property with a data | |
| 754 // property. | |
| 755 // Step 12 - updating an existing data property with a data or generic | |
| 756 // descriptor. | |
| 757 | |
| 758 if (desc.hasWritable()) { | |
| 759 flag |= desc.isWritable() ? 0 : READ_ONLY; | |
| 760 } else if (!IS_UNDEFINED(current)) { | |
| 761 flag |= current.isWritable() ? 0 : READ_ONLY; | |
| 762 } else { | |
| 763 flag |= READ_ONLY; | |
| 764 } | |
| 765 | |
| 766 var value = UNDEFINED; // Default value is undefined. | |
| 767 if (desc.hasValue()) { | |
| 768 value = desc.getValue(); | |
| 769 } else if (!IS_UNDEFINED(current) && IsDataDescriptor(current)) { | |
| 770 value = current.getValue(); | |
| 771 } | |
| 772 | |
| 773 %DefineDataPropertyUnchecked(obj, p, value, flag); | |
| 774 } else { | |
| 775 // There are 3 cases that lead here: | |
| 776 // Step 4b - defining a new accessor property. | |
| 777 // Steps 9c & 12 - replacing an existing data property with an accessor | |
| 778 // property. | |
| 779 // Step 12 - updating an existing accessor property with an accessor | |
| 780 // descriptor. | |
| 781 var getter = null; | |
| 782 if (desc.hasGetter()) { | |
| 783 getter = desc.getGet(); | |
| 784 } else if (IsAccessorDescriptor(current) && current.hasGetter()) { | |
| 785 getter = current.getGet(); | |
| 786 } | |
| 787 var setter = null; | |
| 788 if (desc.hasSetter()) { | |
| 789 setter = desc.getSet(); | |
| 790 } else if (IsAccessorDescriptor(current) && current.hasSetter()) { | |
| 791 setter = current.getSet(); | |
| 792 } | |
| 793 %DefineAccessorPropertyUnchecked(obj, p, getter, setter, flag); | |
| 794 } | |
| 795 return true; | |
| 796 } | |
| 797 | |
| 798 | |
| 799 // ES5 section 15.4.5.1. | |
| 800 function DefineArrayProperty(obj, p, desc, should_throw) { | |
| 801 // Step 3 - Special handling for array index. | |
| 802 if (!IS_SYMBOL(p)) { | |
| 803 var index = TO_UINT32(p); | |
| 804 var emit_splice = false; | |
| 805 if (TO_STRING(index) == p && index != 4294967295) { | |
| 806 var length = obj.length; | |
| 807 if (index >= length && %IsObserved(obj)) { | |
| 808 emit_splice = true; | |
| 809 $observeBeginPerformSplice(obj); | |
| 810 } | |
| 811 | |
| 812 var length_desc = GetOwnPropertyJS(obj, "length"); | |
| 813 if ((index >= length && !length_desc.isWritable()) || | |
| 814 !DefineObjectProperty(obj, p, desc, true)) { | |
| 815 if (emit_splice) | |
| 816 $observeEndPerformSplice(obj); | |
| 817 if (should_throw) { | |
| 818 throw MakeTypeError(kDefineDisallowed, p); | |
| 819 } else { | |
| 820 return false; | |
| 821 } | |
| 822 } | |
| 823 if (index >= length) { | |
| 824 obj.length = index + 1; | |
| 825 } | |
| 826 if (emit_splice) { | |
| 827 $observeEndPerformSplice(obj); | |
| 828 $observeEnqueueSpliceRecord(obj, length, [], index + 1 - length); | |
| 829 } | |
| 830 return true; | |
| 831 } | |
| 832 } | |
| 833 | |
| 834 // Step 5 - Fallback to default implementation. | |
| 835 return DefineObjectProperty(obj, p, desc, should_throw); | |
| 836 } | |
| 837 | |
| 838 | |
| 839 // ES5 section 8.12.9, ES5 section 15.4.5.1 and Harmony proxies. | |
| 840 function DefineOwnProperty(obj, p, desc, should_throw) { | |
| 841 if (%_IsJSProxy(obj)) { | |
| 842 // TODO(rossberg): adjust once there is a story for symbols vs proxies. | |
| 843 if (IS_SYMBOL(p)) return false; | |
| 844 | |
| 845 var attributes = FromGenericPropertyDescriptor(desc); | |
| 846 return DefineProxyProperty(obj, p, attributes, should_throw); | |
| 847 } else if (IS_ARRAY(obj)) { | |
| 848 return DefineArrayProperty(obj, p, desc, should_throw); | |
| 849 } else { | |
| 850 return DefineObjectProperty(obj, p, desc, should_throw); | |
| 851 } | |
| 852 } | |
| 853 | |
| 854 | |
| 855 function DefineOwnPropertyFromAPI(obj, p, value, desc) { | |
| 856 return DefineOwnProperty(obj, p, ToPropertyDescriptor({ | |
| 857 value: value, | |
| 858 writable: desc[0], | |
| 859 enumerable: desc[1], | |
| 860 configurable: desc[2] | |
| 861 }), | |
| 862 false); | |
| 863 } | |
| 864 | |
| 865 | |
| 866 // ES6 section 19.1.2.9 | |
| 867 function ObjectGetPrototypeOf(obj) { | |
| 868 return %_GetPrototype(TO_OBJECT(obj)); | |
| 869 } | |
| 870 | |
| 871 // ES6 section 19.1.2.19. | |
| 872 function ObjectSetPrototypeOf(obj, proto) { | |
| 873 CHECK_OBJECT_COERCIBLE(obj, "Object.setPrototypeOf"); | |
| 874 | |
| 875 if (proto !== null && !IS_SPEC_OBJECT(proto)) { | |
| 876 throw MakeTypeError(kProtoObjectOrNull, proto); | |
| 877 } | |
| 878 | |
| 879 if (IS_SPEC_OBJECT(obj)) { | |
| 880 %SetPrototype(obj, proto); | |
| 881 } | |
| 882 | |
| 883 return obj; | |
| 884 } | |
| 885 | |
| 886 | |
| 887 // ES6 section 19.1.2.6 | |
| 888 function ObjectGetOwnPropertyDescriptor(obj, p) { | |
| 889 var desc = GetOwnPropertyJS(TO_OBJECT(obj), p); | |
| 890 return FromPropertyDescriptor(desc); | |
| 891 } | |
| 892 | |
| 893 | |
| 894 // For Harmony proxies | |
| 895 function ToNameArray(obj, trap, includeSymbols) { | |
| 896 if (!IS_SPEC_OBJECT(obj)) { | |
| 897 throw MakeTypeError(kProxyNonObjectPropNames, trap, obj); | |
| 898 } | |
| 899 var n = TO_UINT32(obj.length); | |
| 900 var array = new GlobalArray(n); | |
| 901 var realLength = 0; | |
| 902 var names = { __proto__: null }; // TODO(rossberg): use sets once ready. | |
| 903 for (var index = 0; index < n; index++) { | |
| 904 var s = TO_NAME(obj[index]); | |
| 905 // TODO(rossberg): adjust once there is a story for symbols vs proxies. | |
| 906 if (IS_SYMBOL(s) && !includeSymbols) continue; | |
| 907 if (%HasOwnProperty(names, s)) { | |
| 908 throw MakeTypeError(kProxyRepeatedPropName, trap, s); | |
| 909 } | |
| 910 array[realLength] = s; | |
| 911 ++realLength; | |
| 912 names[s] = 0; | |
| 913 } | |
| 914 array.length = realLength; | |
| 915 return array; | |
| 916 } | |
| 917 | |
| 918 | |
| 919 function ObjectGetOwnPropertyKeys(obj, filter) { | |
| 920 var nameArrays = new InternalArray(); | |
| 921 filter |= PROPERTY_ATTRIBUTES_PRIVATE_SYMBOL; | |
| 922 var interceptorInfo = %GetInterceptorInfo(obj); | |
| 923 | |
| 924 // Find all the indexed properties. | |
| 925 | |
| 926 // Only get own element names if we want to include string keys. | |
| 927 if ((filter & PROPERTY_ATTRIBUTES_STRING) === 0) { | |
| 928 var ownElementNames = %GetOwnElementNames(obj); | |
| 929 for (var i = 0; i < ownElementNames.length; ++i) { | |
| 930 ownElementNames[i] = %_NumberToString(ownElementNames[i]); | |
| 931 } | |
| 932 nameArrays.push(ownElementNames); | |
| 933 // Get names for indexed interceptor properties. | |
| 934 if ((interceptorInfo & 1) != 0) { | |
| 935 var indexedInterceptorNames = %GetIndexedInterceptorElementNames(obj); | |
| 936 if (!IS_UNDEFINED(indexedInterceptorNames)) { | |
| 937 nameArrays.push(indexedInterceptorNames); | |
| 938 } | |
| 939 } | |
| 940 } | |
| 941 | |
| 942 // Find all the named properties. | |
| 943 | |
| 944 // Get own property names. | |
| 945 nameArrays.push(%GetOwnPropertyNames(obj, filter)); | |
| 946 | |
| 947 // Get names for named interceptor properties if any. | |
| 948 if ((interceptorInfo & 2) != 0) { | |
| 949 var namedInterceptorNames = | |
| 950 %GetNamedInterceptorPropertyNames(obj); | |
| 951 if (!IS_UNDEFINED(namedInterceptorNames)) { | |
| 952 nameArrays.push(namedInterceptorNames); | |
| 953 } | |
| 954 } | |
| 955 | |
| 956 var propertyNames = | |
| 957 %Apply(InternalArray.prototype.concat, | |
| 958 nameArrays[0], nameArrays, 1, nameArrays.length - 1); | |
| 959 | |
| 960 // Property names are expected to be unique strings, | |
| 961 // but interceptors can interfere with that assumption. | |
| 962 if (interceptorInfo != 0) { | |
| 963 var seenKeys = { __proto__: null }; | |
| 964 var j = 0; | |
| 965 for (var i = 0; i < propertyNames.length; ++i) { | |
| 966 var name = propertyNames[i]; | |
| 967 if (IS_SYMBOL(name)) { | |
| 968 if ((filter & PROPERTY_ATTRIBUTES_SYMBOLIC) || IS_PRIVATE(name)) { | |
| 969 continue; | |
| 970 } | |
| 971 } else { | |
| 972 if (filter & PROPERTY_ATTRIBUTES_STRING) continue; | |
| 973 name = TO_STRING(name); | |
| 974 } | |
| 975 if (seenKeys[name]) continue; | |
| 976 seenKeys[name] = true; | |
| 977 propertyNames[j++] = name; | |
| 978 } | |
| 979 propertyNames.length = j; | |
| 980 } | |
| 981 | |
| 982 return propertyNames; | |
| 983 } | |
| 984 | |
| 985 | |
| 986 // ES6 section 9.1.12 / 9.5.12 | |
| 987 function OwnPropertyKeys(obj) { | |
| 988 if (%_IsJSProxy(obj)) { | |
| 989 var handler = %GetHandler(obj); | |
| 990 // TODO(caitp): Proxy.[[OwnPropertyKeys]] can not be implemented to spec | |
| 991 // without an implementation of Direct Proxies. | |
| 992 var names = CallTrap0(handler, "ownKeys", UNDEFINED); | |
| 993 return ToNameArray(names, "getOwnPropertyNames", false); | |
| 994 } | |
| 995 return ObjectGetOwnPropertyKeys(obj, PROPERTY_ATTRIBUTES_PRIVATE_SYMBOL); | |
| 996 } | |
| 997 | |
| 998 | |
| 999 // ES5 section 15.2.3.4. | |
| 1000 function ObjectGetOwnPropertyNames(obj) { | |
| 1001 obj = TO_OBJECT(obj); | |
| 1002 // Special handling for proxies. | |
| 1003 if (%_IsJSProxy(obj)) { | |
| 1004 var handler = %GetHandler(obj); | |
| 1005 var names = CallTrap0(handler, "getOwnPropertyNames", UNDEFINED); | |
| 1006 return ToNameArray(names, "getOwnPropertyNames", false); | |
| 1007 } | |
| 1008 | |
| 1009 return ObjectGetOwnPropertyKeys(obj, PROPERTY_ATTRIBUTES_SYMBOLIC); | |
| 1010 } | |
| 1011 | |
| 1012 | |
| 1013 // ES5 section 15.2.3.5. | |
| 1014 function ObjectCreate(proto, properties) { | |
| 1015 if (!IS_SPEC_OBJECT(proto) && proto !== null) { | |
| 1016 throw MakeTypeError(kProtoObjectOrNull, proto); | |
| 1017 } | |
| 1018 var obj = {}; | |
| 1019 %InternalSetPrototype(obj, proto); | |
| 1020 if (!IS_UNDEFINED(properties)) ObjectDefineProperties(obj, properties); | |
| 1021 return obj; | |
| 1022 } | |
| 1023 | |
| 1024 | |
| 1025 // ES5 section 15.2.3.6. | |
| 1026 function ObjectDefineProperty(obj, p, attributes) { | |
| 1027 if (!IS_SPEC_OBJECT(obj)) { | |
| 1028 throw MakeTypeError(kCalledOnNonObject, "Object.defineProperty"); | |
| 1029 } | |
| 1030 var name = TO_NAME(p); | |
| 1031 if (%_IsJSProxy(obj)) { | |
| 1032 // Clone the attributes object for protection. | |
| 1033 // TODO(rossberg): not spec'ed yet, so not sure if this should involve | |
| 1034 // non-own properties as it does (or non-enumerable ones, as it doesn't?). | |
| 1035 var attributesClone = { __proto__: null }; | |
| 1036 for (var a in attributes) { | |
| 1037 attributesClone[a] = attributes[a]; | |
| 1038 } | |
| 1039 DefineProxyProperty(obj, name, attributesClone, true); | |
| 1040 // The following would implement the spec as in the current proposal, | |
| 1041 // but after recent comments on es-discuss, is most likely obsolete. | |
| 1042 /* | |
| 1043 var defineObj = FromGenericPropertyDescriptor(desc); | |
| 1044 var names = ObjectGetOwnPropertyNames(attributes); | |
| 1045 var standardNames = | |
| 1046 {value: 0, writable: 0, get: 0, set: 0, enumerable: 0, configurable: 0}; | |
| 1047 for (var i = 0; i < names.length; i++) { | |
| 1048 var N = names[i]; | |
| 1049 if (!(%HasOwnProperty(standardNames, N))) { | |
| 1050 var attr = GetOwnPropertyJS(attributes, N); | |
| 1051 DefineOwnProperty(descObj, N, attr, true); | |
| 1052 } | |
| 1053 } | |
| 1054 // This is really confusing the types, but it is what the proxies spec | |
| 1055 // currently requires: | |
| 1056 desc = descObj; | |
| 1057 */ | |
| 1058 } else { | |
| 1059 var desc = ToPropertyDescriptor(attributes); | |
| 1060 DefineOwnProperty(obj, name, desc, true); | |
| 1061 } | |
| 1062 return obj; | |
| 1063 } | |
| 1064 | |
| 1065 | |
| 1066 function GetOwnEnumerablePropertyNames(object) { | |
| 1067 var names = new InternalArray(); | |
| 1068 for (var key in object) { | |
| 1069 if (%HasOwnProperty(object, key)) { | |
| 1070 names.push(key); | |
| 1071 } | |
| 1072 } | |
| 1073 | |
| 1074 var filter = PROPERTY_ATTRIBUTES_STRING | PROPERTY_ATTRIBUTES_PRIVATE_SYMBOL; | |
| 1075 var symbols = %GetOwnPropertyNames(object, filter); | |
| 1076 for (var i = 0; i < symbols.length; ++i) { | |
| 1077 var symbol = symbols[i]; | |
| 1078 if (IS_SYMBOL(symbol)) { | |
| 1079 var desc = ObjectGetOwnPropertyDescriptor(object, symbol); | |
| 1080 if (desc.enumerable) names.push(symbol); | |
| 1081 } | |
| 1082 } | |
| 1083 | |
| 1084 return names; | |
| 1085 } | |
| 1086 | |
| 1087 | |
| 1088 // ES5 section 15.2.3.7. | |
| 1089 function ObjectDefineProperties(obj, properties) { | |
| 1090 if (!IS_SPEC_OBJECT(obj)) { | |
| 1091 throw MakeTypeError(kCalledOnNonObject, "Object.defineProperties"); | |
| 1092 } | |
| 1093 var props = TO_OBJECT(properties); | |
| 1094 var names = GetOwnEnumerablePropertyNames(props); | |
| 1095 var descriptors = new InternalArray(); | |
| 1096 for (var i = 0; i < names.length; i++) { | |
| 1097 descriptors.push(ToPropertyDescriptor(props[names[i]])); | |
| 1098 } | |
| 1099 for (var i = 0; i < names.length; i++) { | |
| 1100 DefineOwnProperty(obj, names[i], descriptors[i], true); | |
| 1101 } | |
| 1102 return obj; | |
| 1103 } | |
| 1104 | |
| 1105 | |
| 1106 // Harmony proxies. | |
| 1107 function ProxyFix(obj) { | |
| 1108 var handler = %GetHandler(obj); | |
| 1109 var props = CallTrap0(handler, "fix", UNDEFINED); | |
| 1110 if (IS_UNDEFINED(props)) { | |
| 1111 throw MakeTypeError(kProxyHandlerReturned, handler, "undefined", "fix"); | |
| 1112 } | |
| 1113 | |
| 1114 if (%IsJSFunctionProxy(obj)) { | |
| 1115 var callTrap = %GetCallTrap(obj); | |
| 1116 var constructTrap = %GetConstructTrap(obj); | |
| 1117 var code = ProxyDelegateCallAndConstruct(callTrap, constructTrap); | |
| 1118 %Fix(obj); // becomes a regular function | |
| 1119 %SetCode(obj, code); | |
| 1120 // TODO(rossberg): What about length and other properties? Not specified. | |
| 1121 // We just put in some half-reasonable defaults for now. | |
| 1122 var prototype = new GlobalObject(); | |
| 1123 ObjectDefineProperty(prototype, "constructor", | |
| 1124 {value: obj, writable: true, enumerable: false, configurable: true}); | |
| 1125 // TODO(v8:1530): defineProperty does not handle prototype and length. | |
| 1126 %FunctionSetPrototype(obj, prototype); | |
| 1127 obj.length = 0; | |
| 1128 } else { | |
| 1129 %Fix(obj); | |
| 1130 } | |
| 1131 ObjectDefineProperties(obj, props); | |
| 1132 } | |
| 1133 | |
| 1134 | |
| 1135 // ES5 section 15.2.3.8. | |
| 1136 function ObjectSealJS(obj) { | |
| 1137 if (!IS_SPEC_OBJECT(obj)) return obj; | |
| 1138 var isProxy = %_IsJSProxy(obj); | |
| 1139 if (isProxy || %HasSloppyArgumentsElements(obj) || %IsObserved(obj)) { | |
| 1140 if (isProxy) { | |
| 1141 ProxyFix(obj); | |
| 1142 } | |
| 1143 var names = ObjectGetOwnPropertyNames(obj); | |
| 1144 for (var i = 0; i < names.length; i++) { | |
| 1145 var name = names[i]; | |
| 1146 var desc = GetOwnPropertyJS(obj, name); | |
| 1147 if (desc.isConfigurable()) { | |
| 1148 desc.setConfigurable(false); | |
| 1149 DefineOwnProperty(obj, name, desc, true); | |
| 1150 } | |
| 1151 } | |
| 1152 %PreventExtensions(obj); | |
| 1153 } else { | |
| 1154 // TODO(adamk): Is it worth going to this fast path if the | |
| 1155 // object's properties are already in dictionary mode? | |
| 1156 %ObjectSeal(obj); | |
| 1157 } | |
| 1158 return obj; | |
| 1159 } | |
| 1160 | |
| 1161 | |
| 1162 // ES5 section 15.2.3.9. | |
| 1163 function ObjectFreezeJS(obj) { | |
| 1164 if (!IS_SPEC_OBJECT(obj)) return obj; | |
| 1165 var isProxy = %_IsJSProxy(obj); | |
| 1166 // TODO(conradw): Investigate modifying the fast path to accommodate strong | |
| 1167 // objects. | |
| 1168 if (isProxy || %HasSloppyArgumentsElements(obj) || %IsObserved(obj) || | |
| 1169 IS_STRONG(obj)) { | |
| 1170 if (isProxy) { | |
| 1171 ProxyFix(obj); | |
| 1172 } | |
| 1173 var names = ObjectGetOwnPropertyNames(obj); | |
| 1174 for (var i = 0; i < names.length; i++) { | |
| 1175 var name = names[i]; | |
| 1176 var desc = GetOwnPropertyJS(obj, name); | |
| 1177 if (desc.isWritable() || desc.isConfigurable()) { | |
| 1178 if (IsDataDescriptor(desc)) desc.setWritable(false); | |
| 1179 desc.setConfigurable(false); | |
| 1180 DefineOwnProperty(obj, name, desc, true); | |
| 1181 } | |
| 1182 } | |
| 1183 %PreventExtensions(obj); | |
| 1184 } else { | |
| 1185 // TODO(adamk): Is it worth going to this fast path if the | |
| 1186 // object's properties are already in dictionary mode? | |
| 1187 %ObjectFreeze(obj); | |
| 1188 } | |
| 1189 return obj; | |
| 1190 } | |
| 1191 | |
| 1192 | |
| 1193 // ES5 section 15.2.3.10 | |
| 1194 function ObjectPreventExtension(obj) { | |
| 1195 if (!IS_SPEC_OBJECT(obj)) return obj; | |
| 1196 if (%_IsJSProxy(obj)) { | |
| 1197 ProxyFix(obj); | |
| 1198 } | |
| 1199 %PreventExtensions(obj); | |
| 1200 return obj; | |
| 1201 } | |
| 1202 | |
| 1203 | |
| 1204 // ES5 section 15.2.3.11 | |
| 1205 function ObjectIsSealed(obj) { | |
| 1206 if (!IS_SPEC_OBJECT(obj)) return true; | |
| 1207 if (%_IsJSProxy(obj)) { | |
| 1208 return false; | |
| 1209 } | |
| 1210 if (%IsExtensible(obj)) { | |
| 1211 return false; | |
| 1212 } | |
| 1213 var names = ObjectGetOwnPropertyNames(obj); | |
| 1214 for (var i = 0; i < names.length; i++) { | |
| 1215 var name = names[i]; | |
| 1216 var desc = GetOwnPropertyJS(obj, name); | |
| 1217 if (desc.isConfigurable()) { | |
| 1218 return false; | |
| 1219 } | |
| 1220 } | |
| 1221 return true; | |
| 1222 } | |
| 1223 | |
| 1224 | |
| 1225 // ES5 section 15.2.3.12 | |
| 1226 function ObjectIsFrozen(obj) { | |
| 1227 if (!IS_SPEC_OBJECT(obj)) return true; | |
| 1228 if (%_IsJSProxy(obj)) { | |
| 1229 return false; | |
| 1230 } | |
| 1231 if (%IsExtensible(obj)) { | |
| 1232 return false; | |
| 1233 } | |
| 1234 var names = ObjectGetOwnPropertyNames(obj); | |
| 1235 for (var i = 0; i < names.length; i++) { | |
| 1236 var name = names[i]; | |
| 1237 var desc = GetOwnPropertyJS(obj, name); | |
| 1238 if (IsDataDescriptor(desc) && desc.isWritable()) return false; | |
| 1239 if (desc.isConfigurable()) return false; | |
| 1240 } | |
| 1241 return true; | |
| 1242 } | |
| 1243 | |
| 1244 | |
| 1245 // ES5 section 15.2.3.13 | |
| 1246 function ObjectIsExtensible(obj) { | |
| 1247 if (!IS_SPEC_OBJECT(obj)) return false; | |
| 1248 if (%_IsJSProxy(obj)) { | |
| 1249 return true; | |
| 1250 } | |
| 1251 return %IsExtensible(obj); | |
| 1252 } | |
| 1253 | |
| 1254 | |
| 1255 // ECMA-262, Edition 6, section 19.1.2.10 | |
| 1256 function ObjectIs(obj1, obj2) { | |
| 1257 return $sameValue(obj1, obj2); | |
| 1258 } | |
| 1259 | |
| 1260 | |
| 1261 // ECMA-262, Edition 6, section 19.1.2.1 | |
| 1262 function ObjectAssign(target, sources) { | |
| 1263 // TODO(bmeurer): Move this to toplevel. | |
| 1264 "use strict"; | |
| 1265 var to = TO_OBJECT(target); | |
| 1266 var argsLen = %_ArgumentsLength(); | |
| 1267 if (argsLen < 2) return to; | |
| 1268 | |
| 1269 for (var i = 1; i < argsLen; ++i) { | |
| 1270 var nextSource = %_Arguments(i); | |
| 1271 if (IS_NULL_OR_UNDEFINED(nextSource)) { | |
| 1272 continue; | |
| 1273 } | |
| 1274 | |
| 1275 var from = TO_OBJECT(nextSource); | |
| 1276 var keys = OwnPropertyKeys(from); | |
| 1277 var len = keys.length; | |
| 1278 | |
| 1279 for (var j = 0; j < len; ++j) { | |
| 1280 var key = keys[j]; | |
| 1281 if (%IsPropertyEnumerable(from, key)) { | |
| 1282 var propValue = from[key]; | |
| 1283 to[key] = propValue; | |
| 1284 } | |
| 1285 } | |
| 1286 } | |
| 1287 return to; | |
| 1288 } | |
| 1289 | |
| 1290 | |
| 1291 // ECMA-262, Edition 6, section B.2.2.1.1 | |
| 1292 function ObjectGetProto() { | |
| 1293 return %_GetPrototype(TO_OBJECT(this)); | |
| 1294 } | |
| 1295 | |
| 1296 | |
| 1297 // ECMA-262, Edition 6, section B.2.2.1.2 | |
| 1298 function ObjectSetProto(proto) { | |
| 1299 CHECK_OBJECT_COERCIBLE(this, "Object.prototype.__proto__"); | |
| 1300 | |
| 1301 if ((IS_SPEC_OBJECT(proto) || IS_NULL(proto)) && IS_SPEC_OBJECT(this)) { | |
| 1302 %SetPrototype(this, proto); | |
| 1303 } | |
| 1304 } | |
| 1305 | |
| 1306 | |
| 1307 function ObjectConstructor(x) { | |
| 1308 if (%_IsConstructCall()) { | |
| 1309 if (x == null) return this; | |
| 1310 return TO_OBJECT(x); | |
| 1311 } else { | |
| 1312 if (x == null) return { }; | |
| 1313 return TO_OBJECT(x); | |
| 1314 } | |
| 1315 } | |
| 1316 | |
| 1317 | |
| 1318 // ---------------------------------------------------------------------------- | |
| 1319 // Object | |
| 1320 | |
| 1321 %SetNativeFlag(GlobalObject); | |
| 1322 %SetCode(GlobalObject, ObjectConstructor); | |
| 1323 | |
| 1324 %AddNamedProperty(GlobalObject.prototype, "constructor", GlobalObject, | |
| 1325 DONT_ENUM); | |
| 1326 | |
| 1327 // Set up non-enumerable functions on the Object.prototype object. | |
| 1328 utils.InstallFunctions(GlobalObject.prototype, DONT_ENUM, [ | |
| 1329 "toString", ObjectToString, | |
| 1330 "toLocaleString", ObjectToLocaleString, | |
| 1331 "valueOf", ObjectValueOf, | |
| 1332 "hasOwnProperty", ObjectHasOwnProperty, | |
| 1333 "isPrototypeOf", ObjectIsPrototypeOf, | |
| 1334 "propertyIsEnumerable", ObjectPropertyIsEnumerable, | |
| 1335 "__defineGetter__", ObjectDefineGetter, | |
| 1336 "__lookupGetter__", ObjectLookupGetter, | |
| 1337 "__defineSetter__", ObjectDefineSetter, | |
| 1338 "__lookupSetter__", ObjectLookupSetter | |
| 1339 ]); | |
| 1340 utils.InstallGetterSetter(GlobalObject.prototype, "__proto__", ObjectGetProto, | |
| 1341 ObjectSetProto); | |
| 1342 | |
| 1343 // Set up non-enumerable functions in the Object object. | |
| 1344 utils.InstallFunctions(GlobalObject, DONT_ENUM, [ | |
| 1345 "assign", ObjectAssign, | |
| 1346 "keys", ObjectKeys, | |
| 1347 "create", ObjectCreate, | |
| 1348 "defineProperty", ObjectDefineProperty, | |
| 1349 "defineProperties", ObjectDefineProperties, | |
| 1350 "freeze", ObjectFreezeJS, | |
| 1351 "getPrototypeOf", ObjectGetPrototypeOf, | |
| 1352 "setPrototypeOf", ObjectSetPrototypeOf, | |
| 1353 "getOwnPropertyDescriptor", ObjectGetOwnPropertyDescriptor, | |
| 1354 "getOwnPropertyNames", ObjectGetOwnPropertyNames, | |
| 1355 // getOwnPropertySymbols is added in symbol.js. | |
| 1356 "is", ObjectIs, | |
| 1357 "isExtensible", ObjectIsExtensible, | |
| 1358 "isFrozen", ObjectIsFrozen, | |
| 1359 "isSealed", ObjectIsSealed, | |
| 1360 "preventExtensions", ObjectPreventExtension, | |
| 1361 "seal", ObjectSealJS | |
| 1362 // deliverChangeRecords, getNotifier, observe and unobserve are added | |
| 1363 // in object-observe.js. | |
| 1364 ]); | |
| 1365 | |
| 1366 | |
| 1367 // ---------------------------------------------------------------------------- | |
| 1368 // Boolean | |
| 1369 | |
| 1370 function BooleanConstructor(x) { | |
| 1371 // TODO(bmeurer): Move this to toplevel. | |
| 1372 "use strict"; | |
| 1373 if (%_IsConstructCall()) { | |
| 1374 %_SetValueOf(this, TO_BOOLEAN(x)); | |
| 1375 } else { | |
| 1376 return TO_BOOLEAN(x); | |
| 1377 } | |
| 1378 } | |
| 1379 | |
| 1380 | |
| 1381 function BooleanToString() { | |
| 1382 // NOTE: Both Boolean objects and values can enter here as | |
| 1383 // 'this'. This is not as dictated by ECMA-262. | |
| 1384 var b = this; | |
| 1385 if (!IS_BOOLEAN(b)) { | |
| 1386 if (!IS_BOOLEAN_WRAPPER(b)) { | |
| 1387 throw MakeTypeError(kNotGeneric, 'Boolean.prototype.toString'); | |
| 1388 } | |
| 1389 b = %_ValueOf(b); | |
| 1390 } | |
| 1391 return b ? 'true' : 'false'; | |
| 1392 } | |
| 1393 | |
| 1394 | |
| 1395 function BooleanValueOf() { | |
| 1396 // NOTE: Both Boolean objects and values can enter here as | |
| 1397 // 'this'. This is not as dictated by ECMA-262. | |
| 1398 if (!IS_BOOLEAN(this) && !IS_BOOLEAN_WRAPPER(this)) { | |
| 1399 throw MakeTypeError(kNotGeneric, 'Boolean.prototype.valueOf'); | |
| 1400 } | |
| 1401 return %_ValueOf(this); | |
| 1402 } | |
| 1403 | |
| 1404 | |
| 1405 // ---------------------------------------------------------------------------- | |
| 1406 | |
| 1407 %SetCode(GlobalBoolean, BooleanConstructor); | |
| 1408 %FunctionSetPrototype(GlobalBoolean, new GlobalBoolean(false)); | |
| 1409 %AddNamedProperty(GlobalBoolean.prototype, "constructor", GlobalBoolean, | |
| 1410 DONT_ENUM); | |
| 1411 | |
| 1412 utils.InstallFunctions(GlobalBoolean.prototype, DONT_ENUM, [ | |
| 1413 "toString", BooleanToString, | |
| 1414 "valueOf", BooleanValueOf | |
| 1415 ]); | |
| 1416 | |
| 1417 | |
| 1418 // ---------------------------------------------------------------------------- | |
| 1419 // Number | |
| 1420 | |
| 1421 function NumberConstructor(x) { | |
| 1422 // TODO(bmeurer): Move this to toplevel. | |
| 1423 "use strict"; | |
| 1424 var value = %_ArgumentsLength() == 0 ? 0 : TO_NUMBER(x); | |
| 1425 if (%_IsConstructCall()) { | |
| 1426 %_SetValueOf(this, value); | |
| 1427 } else { | |
| 1428 return value; | |
| 1429 } | |
| 1430 } | |
| 1431 | |
| 1432 | |
| 1433 // ECMA-262 section 15.7.4.2. | |
| 1434 function NumberToStringJS(radix) { | |
| 1435 // NOTE: Both Number objects and values can enter here as | |
| 1436 // 'this'. This is not as dictated by ECMA-262. | |
| 1437 var number = this; | |
| 1438 if (!IS_NUMBER(this)) { | |
| 1439 if (!IS_NUMBER_WRAPPER(this)) { | |
| 1440 throw MakeTypeError(kNotGeneric, 'Number.prototype.toString'); | |
| 1441 } | |
| 1442 // Get the value of this number in case it's an object. | |
| 1443 number = %_ValueOf(this); | |
| 1444 } | |
| 1445 // Fast case: Convert number in radix 10. | |
| 1446 if (IS_UNDEFINED(radix) || radix === 10) { | |
| 1447 return %_NumberToString(number); | |
| 1448 } | |
| 1449 | |
| 1450 // Convert the radix to an integer and check the range. | |
| 1451 radix = TO_INTEGER(radix); | |
| 1452 if (radix < 2 || radix > 36) throw MakeRangeError(kToRadixFormatRange); | |
| 1453 // Convert the number to a string in the given radix. | |
| 1454 return %NumberToRadixString(number, radix); | |
| 1455 } | |
| 1456 | |
| 1457 | |
| 1458 // ECMA-262 section 15.7.4.3 | |
| 1459 function NumberToLocaleString() { | |
| 1460 return %_CallFunction(this, NumberToStringJS); | |
| 1461 } | |
| 1462 | |
| 1463 | |
| 1464 // ECMA-262 section 15.7.4.4 | |
| 1465 function NumberValueOf() { | |
| 1466 // NOTE: Both Number objects and values can enter here as | |
| 1467 // 'this'. This is not as dictated by ECMA-262. | |
| 1468 if (!IS_NUMBER(this) && !IS_NUMBER_WRAPPER(this)) { | |
| 1469 throw MakeTypeError(kNotGeneric, 'Number.prototype.valueOf'); | |
| 1470 } | |
| 1471 return %_ValueOf(this); | |
| 1472 } | |
| 1473 | |
| 1474 | |
| 1475 // ECMA-262 section 15.7.4.5 | |
| 1476 function NumberToFixedJS(fractionDigits) { | |
| 1477 var x = this; | |
| 1478 if (!IS_NUMBER(this)) { | |
| 1479 if (!IS_NUMBER_WRAPPER(this)) { | |
| 1480 throw MakeTypeError(kIncompatibleMethodReceiver, | |
| 1481 "Number.prototype.toFixed", this); | |
| 1482 } | |
| 1483 // Get the value of this number in case it's an object. | |
| 1484 x = %_ValueOf(this); | |
| 1485 } | |
| 1486 var f = TO_INTEGER(fractionDigits); | |
| 1487 | |
| 1488 if (f < 0 || f > 20) { | |
| 1489 throw MakeRangeError(kNumberFormatRange, "toFixed() digits"); | |
| 1490 } | |
| 1491 | |
| 1492 if (NUMBER_IS_NAN(x)) return "NaN"; | |
| 1493 if (x == INFINITY) return "Infinity"; | |
| 1494 if (x == -INFINITY) return "-Infinity"; | |
| 1495 | |
| 1496 return %NumberToFixed(x, f); | |
| 1497 } | |
| 1498 | |
| 1499 | |
| 1500 // ECMA-262 section 15.7.4.6 | |
| 1501 function NumberToExponentialJS(fractionDigits) { | |
| 1502 var x = this; | |
| 1503 if (!IS_NUMBER(this)) { | |
| 1504 if (!IS_NUMBER_WRAPPER(this)) { | |
| 1505 throw MakeTypeError(kIncompatibleMethodReceiver, | |
| 1506 "Number.prototype.toExponential", this); | |
| 1507 } | |
| 1508 // Get the value of this number in case it's an object. | |
| 1509 x = %_ValueOf(this); | |
| 1510 } | |
| 1511 var f = IS_UNDEFINED(fractionDigits) ? UNDEFINED : TO_INTEGER(fractionDigits); | |
| 1512 | |
| 1513 if (NUMBER_IS_NAN(x)) return "NaN"; | |
| 1514 if (x == INFINITY) return "Infinity"; | |
| 1515 if (x == -INFINITY) return "-Infinity"; | |
| 1516 | |
| 1517 if (IS_UNDEFINED(f)) { | |
| 1518 f = -1; // Signal for runtime function that f is not defined. | |
| 1519 } else if (f < 0 || f > 20) { | |
| 1520 throw MakeRangeError(kNumberFormatRange, "toExponential()"); | |
| 1521 } | |
| 1522 return %NumberToExponential(x, f); | |
| 1523 } | |
| 1524 | |
| 1525 | |
| 1526 // ECMA-262 section 15.7.4.7 | |
| 1527 function NumberToPrecisionJS(precision) { | |
| 1528 var x = this; | |
| 1529 if (!IS_NUMBER(this)) { | |
| 1530 if (!IS_NUMBER_WRAPPER(this)) { | |
| 1531 throw MakeTypeError(kIncompatibleMethodReceiver, | |
| 1532 "Number.prototype.toPrecision", this); | |
| 1533 } | |
| 1534 // Get the value of this number in case it's an object. | |
| 1535 x = %_ValueOf(this); | |
| 1536 } | |
| 1537 if (IS_UNDEFINED(precision)) return TO_STRING(x); | |
| 1538 var p = TO_INTEGER(precision); | |
| 1539 | |
| 1540 if (NUMBER_IS_NAN(x)) return "NaN"; | |
| 1541 if (x == INFINITY) return "Infinity"; | |
| 1542 if (x == -INFINITY) return "-Infinity"; | |
| 1543 | |
| 1544 if (p < 1 || p > 21) { | |
| 1545 throw MakeRangeError(kToPrecisionFormatRange); | |
| 1546 } | |
| 1547 return %NumberToPrecision(x, p); | |
| 1548 } | |
| 1549 | |
| 1550 | |
| 1551 // Harmony isFinite. | |
| 1552 function NumberIsFinite(number) { | |
| 1553 return IS_NUMBER(number) && NUMBER_IS_FINITE(number); | |
| 1554 } | |
| 1555 | |
| 1556 | |
| 1557 // Harmony isInteger | |
| 1558 function NumberIsInteger(number) { | |
| 1559 return NumberIsFinite(number) && TO_INTEGER(number) == number; | |
| 1560 } | |
| 1561 | |
| 1562 | |
| 1563 // Harmony isNaN. | |
| 1564 function NumberIsNaN(number) { | |
| 1565 return IS_NUMBER(number) && NUMBER_IS_NAN(number); | |
| 1566 } | |
| 1567 | |
| 1568 | |
| 1569 // Harmony isSafeInteger | |
| 1570 function NumberIsSafeInteger(number) { | |
| 1571 if (NumberIsFinite(number)) { | |
| 1572 var integral = TO_INTEGER(number); | |
| 1573 if (integral == number) { | |
| 1574 return MathAbs(integral) <= kMaxSafeInteger; | |
| 1575 } | |
| 1576 } | |
| 1577 return false; | |
| 1578 } | |
| 1579 | |
| 1580 | |
| 1581 // ---------------------------------------------------------------------------- | |
| 1582 | |
| 1583 %SetCode(GlobalNumber, NumberConstructor); | |
| 1584 %FunctionSetPrototype(GlobalNumber, new GlobalNumber(0)); | |
| 1585 | |
| 1586 %OptimizeObjectForAddingMultipleProperties(GlobalNumber.prototype, 8); | |
| 1587 // Set up the constructor property on the Number prototype object. | |
| 1588 %AddNamedProperty(GlobalNumber.prototype, "constructor", GlobalNumber, | |
| 1589 DONT_ENUM); | |
| 1590 | |
| 1591 utils.InstallConstants(GlobalNumber, [ | |
| 1592 // ECMA-262 section 15.7.3.1. | |
| 1593 "MAX_VALUE", 1.7976931348623157e+308, | |
| 1594 // ECMA-262 section 15.7.3.2. | |
| 1595 "MIN_VALUE", 5e-324, | |
| 1596 // ECMA-262 section 15.7.3.3. | |
| 1597 "NaN", NAN, | |
| 1598 // ECMA-262 section 15.7.3.4. | |
| 1599 "NEGATIVE_INFINITY", -INFINITY, | |
| 1600 // ECMA-262 section 15.7.3.5. | |
| 1601 "POSITIVE_INFINITY", INFINITY, | |
| 1602 | |
| 1603 // --- Harmony constants (no spec refs until settled.) | |
| 1604 | |
| 1605 "MAX_SAFE_INTEGER", %_MathPow(2, 53) - 1, | |
| 1606 "MIN_SAFE_INTEGER", -%_MathPow(2, 53) + 1, | |
| 1607 "EPSILON", %_MathPow(2, -52) | |
| 1608 ]); | |
| 1609 | |
| 1610 // Set up non-enumerable functions on the Number prototype object. | |
| 1611 utils.InstallFunctions(GlobalNumber.prototype, DONT_ENUM, [ | |
| 1612 "toString", NumberToStringJS, | |
| 1613 "toLocaleString", NumberToLocaleString, | |
| 1614 "valueOf", NumberValueOf, | |
| 1615 "toFixed", NumberToFixedJS, | |
| 1616 "toExponential", NumberToExponentialJS, | |
| 1617 "toPrecision", NumberToPrecisionJS | |
| 1618 ]); | |
| 1619 | |
| 1620 // Harmony Number constructor additions | |
| 1621 utils.InstallFunctions(GlobalNumber, DONT_ENUM, [ | |
| 1622 "isFinite", NumberIsFinite, | |
| 1623 "isInteger", NumberIsInteger, | |
| 1624 "isNaN", NumberIsNaN, | |
| 1625 "isSafeInteger", NumberIsSafeInteger, | |
| 1626 "parseInt", GlobalParseInt, | |
| 1627 "parseFloat", GlobalParseFloat | |
| 1628 ]); | |
| 1629 | |
| 1630 %SetForceInlineFlag(NumberIsNaN); | |
| 1631 | |
| 1632 | |
| 1633 // ---------------------------------------------------------------------------- | |
| 1634 // Function | |
| 1635 | |
| 1636 function NativeCodeFunctionSourceString(func) { | |
| 1637 var name = %FunctionGetName(func); | |
| 1638 if (name) { | |
| 1639 // Mimic what KJS does. | |
| 1640 return 'function ' + name + '() { [native code] }'; | |
| 1641 } | |
| 1642 | |
| 1643 return 'function () { [native code] }'; | |
| 1644 } | |
| 1645 | |
| 1646 function FunctionSourceString(func) { | |
| 1647 while (%IsJSFunctionProxy(func)) { | |
| 1648 func = %GetCallTrap(func); | |
| 1649 } | |
| 1650 | |
| 1651 if (!IS_FUNCTION(func)) { | |
| 1652 throw MakeTypeError(kNotGeneric, 'Function.prototype.toString'); | |
| 1653 } | |
| 1654 | |
| 1655 if (%FunctionHidesSource(func)) { | |
| 1656 return NativeCodeFunctionSourceString(func); | |
| 1657 } | |
| 1658 | |
| 1659 var classSource = %ClassGetSourceCode(func); | |
| 1660 if (IS_STRING(classSource)) { | |
| 1661 return classSource; | |
| 1662 } | |
| 1663 | |
| 1664 var source = %FunctionGetSourceCode(func); | |
| 1665 if (!IS_STRING(source)) { | |
| 1666 return NativeCodeFunctionSourceString(func); | |
| 1667 } | |
| 1668 | |
| 1669 if (%FunctionIsArrow(func)) { | |
| 1670 return source; | |
| 1671 } | |
| 1672 | |
| 1673 var name = %FunctionNameShouldPrintAsAnonymous(func) | |
| 1674 ? 'anonymous' | |
| 1675 : %FunctionGetName(func); | |
| 1676 | |
| 1677 var isGenerator = %FunctionIsGenerator(func); | |
| 1678 var head = %FunctionIsConciseMethod(func) | |
| 1679 ? (isGenerator ? '*' : '') | |
| 1680 : (isGenerator ? 'function* ' : 'function '); | |
| 1681 return head + name + source; | |
| 1682 } | |
| 1683 | |
| 1684 | |
| 1685 function FunctionToString() { | |
| 1686 return FunctionSourceString(this); | |
| 1687 } | |
| 1688 | |
| 1689 | |
| 1690 // ES5 15.3.4.5 | |
| 1691 function FunctionBind(this_arg) { // Length is 1. | |
| 1692 if (!IS_CALLABLE(this)) throw MakeTypeError(kFunctionBind); | |
| 1693 | |
| 1694 var boundFunction = function () { | |
| 1695 // Poison .arguments and .caller, but is otherwise not detectable. | |
| 1696 "use strict"; | |
| 1697 // This function must not use any object literals (Object, Array, RegExp), | |
| 1698 // since the literals-array is being used to store the bound data. | |
| 1699 if (%_IsConstructCall()) { | |
| 1700 return %NewObjectFromBound(boundFunction); | |
| 1701 } | |
| 1702 var bindings = %BoundFunctionGetBindings(boundFunction); | |
| 1703 | |
| 1704 var argc = %_ArgumentsLength(); | |
| 1705 if (argc == 0) { | |
| 1706 return %Apply(bindings[0], bindings[1], bindings, 2, bindings.length - 2); | |
| 1707 } | |
| 1708 if (bindings.length === 2) { | |
| 1709 return %Apply(bindings[0], bindings[1], arguments, 0, argc); | |
| 1710 } | |
| 1711 var bound_argc = bindings.length - 2; | |
| 1712 var argv = new InternalArray(bound_argc + argc); | |
| 1713 for (var i = 0; i < bound_argc; i++) { | |
| 1714 argv[i] = bindings[i + 2]; | |
| 1715 } | |
| 1716 for (var j = 0; j < argc; j++) { | |
| 1717 argv[i++] = %_Arguments(j); | |
| 1718 } | |
| 1719 return %Apply(bindings[0], bindings[1], argv, 0, bound_argc + argc); | |
| 1720 }; | |
| 1721 | |
| 1722 var new_length = 0; | |
| 1723 var old_length = this.length; | |
| 1724 // FunctionProxies might provide a non-UInt32 value. If so, ignore it. | |
| 1725 if ((typeof old_length === "number") && | |
| 1726 ((old_length >>> 0) === old_length)) { | |
| 1727 var argc = %_ArgumentsLength(); | |
| 1728 if (argc > 0) argc--; // Don't count the thisArg as parameter. | |
| 1729 new_length = old_length - argc; | |
| 1730 if (new_length < 0) new_length = 0; | |
| 1731 } | |
| 1732 // This runtime function finds any remaining arguments on the stack, | |
| 1733 // so we don't pass the arguments object. | |
| 1734 var result = %FunctionBindArguments(boundFunction, this, | |
| 1735 this_arg, new_length); | |
| 1736 | |
| 1737 var name = this.name; | |
| 1738 var bound_name = IS_STRING(name) ? name : ""; | |
| 1739 %DefineDataPropertyUnchecked(result, "name", "bound " + bound_name, | |
| 1740 DONT_ENUM | READ_ONLY); | |
| 1741 | |
| 1742 // We already have caller and arguments properties on functions, | |
| 1743 // which are non-configurable. It therefore makes no sence to | |
| 1744 // try to redefine these as defined by the spec. The spec says | |
| 1745 // that bind should make these throw a TypeError if get or set | |
| 1746 // is called and make them non-enumerable and non-configurable. | |
| 1747 // To be consistent with our normal functions we leave this as it is. | |
| 1748 // TODO(lrn): Do set these to be thrower. | |
| 1749 return result; | |
| 1750 } | |
| 1751 | |
| 1752 | |
| 1753 function NewFunctionString(args, function_token) { | |
| 1754 var n = args.length; | |
| 1755 var p = ''; | |
| 1756 if (n > 1) { | |
| 1757 p = TO_STRING(args[0]); | |
| 1758 for (var i = 1; i < n - 1; i++) { | |
| 1759 p += ',' + TO_STRING(args[i]); | |
| 1760 } | |
| 1761 // If the formal parameters string include ) - an illegal | |
| 1762 // character - it may make the combined function expression | |
| 1763 // compile. We avoid this problem by checking for this early on. | |
| 1764 if (%_CallFunction(p, ')', StringIndexOf) != -1) { | |
| 1765 throw MakeSyntaxError(kParenthesisInArgString); | |
| 1766 } | |
| 1767 // If the formal parameters include an unbalanced block comment, the | |
| 1768 // function must be rejected. Since JavaScript does not allow nested | |
| 1769 // comments we can include a trailing block comment to catch this. | |
| 1770 p += '\n/' + '**/'; | |
| 1771 } | |
| 1772 var body = (n > 0) ? TO_STRING(args[n - 1]) : ''; | |
| 1773 return '(' + function_token + '(' + p + ') {\n' + body + '\n})'; | |
| 1774 } | |
| 1775 | |
| 1776 | |
| 1777 function FunctionConstructor(arg1) { // length == 1 | |
| 1778 var source = NewFunctionString(arguments, 'function'); | |
| 1779 var global_proxy = %GlobalProxy(FunctionConstructor); | |
| 1780 // Compile the string in the constructor and not a helper so that errors | |
| 1781 // appear to come from here. | |
| 1782 var f = %_CallFunction(global_proxy, %CompileString(source, true)); | |
| 1783 %FunctionMarkNameShouldPrintAsAnonymous(f); | |
| 1784 return f; | |
| 1785 } | |
| 1786 | |
| 1787 | |
| 1788 // ---------------------------------------------------------------------------- | |
| 1789 | |
| 1790 %SetCode(GlobalFunction, FunctionConstructor); | |
| 1791 %AddNamedProperty(GlobalFunction.prototype, "constructor", GlobalFunction, | |
| 1792 DONT_ENUM); | |
| 1793 | |
| 1794 utils.InstallFunctions(GlobalFunction.prototype, DONT_ENUM, [ | |
| 1795 "bind", FunctionBind, | |
| 1796 "toString", FunctionToString | |
| 1797 ]); | |
| 1798 | |
| 1799 // ---------------------------------------------------------------------------- | |
| 1800 // Iterator related spec functions. | |
| 1801 | |
| 1802 // ES6 rev 33, 2015-02-12 | |
| 1803 // 7.4.1 GetIterator ( obj, method ) | |
| 1804 function GetIterator(obj, method) { | |
| 1805 if (IS_UNDEFINED(method)) { | |
| 1806 method = obj[iteratorSymbol]; | |
| 1807 } | |
| 1808 if (!IS_CALLABLE(method)) { | |
| 1809 throw MakeTypeError(kNotIterable, obj); | |
| 1810 } | |
| 1811 var iterator = %_CallFunction(obj, method); | |
| 1812 if (!IS_SPEC_OBJECT(iterator)) { | |
| 1813 throw MakeTypeError(kNotAnIterator, iterator); | |
| 1814 } | |
| 1815 return iterator; | |
| 1816 } | |
| 1817 | |
| 1818 // ---------------------------------------------------------------------------- | |
| 1819 // Exports | |
| 1820 | |
| 1821 utils.Export(function(to) { | |
| 1822 to.Delete = Delete; | |
| 1823 to.FunctionSourceString = FunctionSourceString; | |
| 1824 to.GetIterator = GetIterator; | |
| 1825 to.GetMethod = GetMethod; | |
| 1826 to.IsFinite = GlobalIsFinite; | |
| 1827 to.IsNaN = GlobalIsNaN; | |
| 1828 to.NewFunctionString = NewFunctionString; | |
| 1829 to.NumberIsNaN = NumberIsNaN; | |
| 1830 to.ObjectDefineProperties = ObjectDefineProperties; | |
| 1831 to.ObjectDefineProperty = ObjectDefineProperty; | |
| 1832 to.ObjectFreeze = ObjectFreezeJS; | |
| 1833 to.ObjectGetOwnPropertyKeys = ObjectGetOwnPropertyKeys; | |
| 1834 to.ObjectHasOwnProperty = ObjectHasOwnProperty; | |
| 1835 to.ObjectIsFrozen = ObjectIsFrozen; | |
| 1836 to.ObjectIsSealed = ObjectIsSealed; | |
| 1837 to.ObjectToString = ObjectToString; | |
| 1838 to.ToNameArray = ToNameArray; | |
| 1839 }); | |
| 1840 | |
| 1841 %InstallToContext([ | |
| 1842 "global_eval_fun", GlobalEval, | |
| 1843 "object_value_of", ObjectValueOf, | |
| 1844 "object_to_string", ObjectToString, | |
| 1845 "object_define_own_property", DefineOwnPropertyFromAPI, | |
| 1846 "object_get_own_property_descriptor", ObjectGetOwnPropertyDescriptor, | |
| 1847 "to_complete_property_descriptor", ToCompletePropertyDescriptor, | |
| 1848 ]); | |
| 1849 | |
| 1850 }) | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1398733002:
Move builtin JavaScript sources into own directory. (Closed)
Base URL: https://chromium.googlesource.com/v8/v8.git@master