| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| (function(global, utils) { |
| |
| %CheckIsBootstrapping(); |
| |
| // ---------------------------------------------------------------------------- |
| // Imports |
| |
| var GlobalArray = global.Array; |
| var GlobalBoolean = global.Boolean; |
| var GlobalNumber = global.Number; |
| var GlobalObject = global.Object; |
| var InternalArray = utils.InternalArray; |
| var iteratorSymbol = utils.ImportNow("iterator_symbol"); |
| var MakeRangeError; |
| var MakeSyntaxError; |
| var MakeTypeError; |
| var MathAbs; |
| var NaN = %GetRootNaN(); |
| var ObjectToString = utils.ImportNow("object_to_string"); |
| var ObserveBeginPerformSplice; |
| var ObserveEndPerformSplice; |
| var ObserveEnqueueSpliceRecord; |
| var SameValue = utils.ImportNow("SameValue"); |
| var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol"); |
| |
| utils.Import(function(from) { |
| MakeRangeError = from.MakeRangeError; |
| MakeSyntaxError = from.MakeSyntaxError; |
| MakeTypeError = from.MakeTypeError; |
| MathAbs = from.MathAbs; |
| ObserveBeginPerformSplice = from.ObserveBeginPerformSplice; |
| ObserveEndPerformSplice = from.ObserveEndPerformSplice; |
| ObserveEnqueueSpliceRecord = from.ObserveEnqueueSpliceRecord; |
| }); |
| |
| // ---------------------------------------------------------------------------- |
| |
| |
| // ES6 18.2.3 isNaN(number) |
| function GlobalIsNaN(number) { |
| number = TO_NUMBER(number); |
| return NUMBER_IS_NAN(number); |
| } |
| |
| |
| // ES6 18.2.2 isFinite(number) |
| function GlobalIsFinite(number) { |
| number = TO_NUMBER(number); |
| return NUMBER_IS_FINITE(number); |
| } |
| |
| |
| // ES6 18.2.5 parseInt(string, radix) |
| function GlobalParseInt(string, radix) { |
| if (IS_UNDEFINED(radix) || radix === 10 || radix === 0) { |
| // Some people use parseInt instead of Math.floor. This |
| // optimization makes parseInt on a Smi 12 times faster (60ns |
| // vs 800ns). The following optimization makes parseInt on a |
| // non-Smi number 9 times faster (230ns vs 2070ns). Together |
| // they make parseInt on a string 1.4% slower (274ns vs 270ns). |
| if (%_IsSmi(string)) return string; |
| if (IS_NUMBER(string) && |
| ((0.01 < string && string < 1e9) || |
| (-1e9 < string && string < -0.01))) { |
| // Truncate number. |
| return string | 0; |
| } |
| string = TO_STRING(string); |
| radix = radix | 0; |
| } else { |
| // The spec says ToString should be evaluated before ToInt32. |
| string = TO_STRING(string); |
| radix = TO_INT32(radix); |
| if (!(radix == 0 || (2 <= radix && radix <= 36))) { |
| return NaN; |
| } |
| } |
| |
| if (%_HasCachedArrayIndex(string) && |
| (radix == 0 || radix == 10)) { |
| return %_GetCachedArrayIndex(string); |
| } |
| return %StringParseInt(string, radix); |
| } |
| |
| |
| // ES6 18.2.4 parseFloat(string) |
| function GlobalParseFloat(string) { |
| // 1. Let inputString be ? ToString(string). |
| string = TO_STRING(string); |
| if (%_HasCachedArrayIndex(string)) return %_GetCachedArrayIndex(string); |
| return %StringParseFloat(string); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| |
| // Set up global object. |
| var attributes = DONT_ENUM | DONT_DELETE | READ_ONLY; |
| |
| utils.InstallConstants(global, [ |
| // ES6 18.1.1 |
| "Infinity", INFINITY, |
| // ES6 18.1.2 |
| "NaN", NaN, |
| // ES6 18.1.3 |
| "undefined", UNDEFINED, |
| ]); |
| |
| // Set up non-enumerable function on the global object. |
| utils.InstallFunctions(global, DONT_ENUM, [ |
| "isNaN", GlobalIsNaN, |
| "isFinite", GlobalIsFinite, |
| "parseInt", GlobalParseInt, |
| "parseFloat", GlobalParseFloat, |
| ]); |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Object |
| |
| // ES6 19.1.3.5 Object.prototype.toLocaleString([reserved1 [,reserved2]]) |
| function ObjectToLocaleString() { |
| CHECK_OBJECT_COERCIBLE(this, "Object.prototype.toLocaleString"); |
| return this.toString(); |
| } |
| |
| |
| // ES6 19.1.3.7 Object.prototype.valueOf() |
| function ObjectValueOf() { |
| return TO_OBJECT(this); |
| } |
| |
| |
| // ES6 7.3.11 |
| function ObjectHasOwnProperty(value) { |
| var name = TO_NAME(value); |
| var object = TO_OBJECT(this); |
| return %HasOwnProperty(object, name); |
| } |
| |
| |
| // ES6 19.1.3.3 Object.prototype.isPrototypeOf(V) |
| function ObjectIsPrototypeOf(V) { |
| if (!IS_RECEIVER(V)) return false; |
| var O = TO_OBJECT(this); |
| return %HasInPrototypeChain(V, O); |
| } |
| |
| |
| // ES6 19.1.3.4 |
| function ObjectPropertyIsEnumerable(V) { |
| var P = TO_NAME(V); |
| return %PropertyIsEnumerable(TO_OBJECT(this), P); |
| } |
| |
| |
| // Extensions for providing property getters and setters. |
| function ObjectDefineGetter(name, fun) { |
| var receiver = this; |
| if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { |
| receiver = %GlobalProxy(ObjectDefineGetter); |
| } |
| if (!IS_CALLABLE(fun)) { |
| throw MakeTypeError(kObjectGetterExpectingFunction); |
| } |
| var desc = new PropertyDescriptor(); |
| desc.setGet(fun); |
| desc.setEnumerable(true); |
| desc.setConfigurable(true); |
| DefineOwnProperty(TO_OBJECT(receiver), TO_NAME(name), desc, false); |
| } |
| |
| |
| function ObjectLookupGetter(name) { |
| var receiver = this; |
| if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { |
| receiver = %GlobalProxy(ObjectLookupGetter); |
| } |
| return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), GETTER); |
| } |
| |
| |
| function ObjectDefineSetter(name, fun) { |
| var receiver = this; |
| if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { |
| receiver = %GlobalProxy(ObjectDefineSetter); |
| } |
| if (!IS_CALLABLE(fun)) { |
| throw MakeTypeError(kObjectSetterExpectingFunction); |
| } |
| var desc = new PropertyDescriptor(); |
| desc.setSet(fun); |
| desc.setEnumerable(true); |
| desc.setConfigurable(true); |
| DefineOwnProperty(TO_OBJECT(receiver), TO_NAME(name), desc, false); |
| } |
| |
| |
| function ObjectLookupSetter(name) { |
| var receiver = this; |
| if (IS_NULL(receiver) || IS_UNDEFINED(receiver)) { |
| receiver = %GlobalProxy(ObjectLookupSetter); |
| } |
| return %LookupAccessor(TO_OBJECT(receiver), TO_NAME(name), SETTER); |
| } |
| |
| |
| // ES6 6.2.4.1 |
| function IsAccessorDescriptor(desc) { |
| if (IS_UNDEFINED(desc)) return false; |
| return desc.hasGetter() || desc.hasSetter(); |
| } |
| |
| |
| // ES6 6.2.4.2 |
| function IsDataDescriptor(desc) { |
| if (IS_UNDEFINED(desc)) return false; |
| return desc.hasValue() || desc.hasWritable(); |
| } |
| |
| |
| // ES6 6.2.4.3 |
| function IsGenericDescriptor(desc) { |
| if (IS_UNDEFINED(desc)) return false; |
| return !(IsAccessorDescriptor(desc) || IsDataDescriptor(desc)); |
| } |
| |
| |
| function IsInconsistentDescriptor(desc) { |
| return IsAccessorDescriptor(desc) && IsDataDescriptor(desc); |
| } |
| |
| |
| // Harmony Proxies |
| function FromGenericPropertyDescriptor(desc) { |
| if (IS_UNDEFINED(desc)) return desc; |
| var obj = new GlobalObject(); |
| |
| if (desc.hasValue()) { |
| %AddNamedProperty(obj, "value", desc.getValue(), NONE); |
| } |
| if (desc.hasWritable()) { |
| %AddNamedProperty(obj, "writable", desc.isWritable(), NONE); |
| } |
| if (desc.hasGetter()) { |
| %AddNamedProperty(obj, "get", desc.getGet(), NONE); |
| } |
| if (desc.hasSetter()) { |
| %AddNamedProperty(obj, "set", desc.getSet(), NONE); |
| } |
| if (desc.hasEnumerable()) { |
| %AddNamedProperty(obj, "enumerable", desc.isEnumerable(), NONE); |
| } |
| if (desc.hasConfigurable()) { |
| %AddNamedProperty(obj, "configurable", desc.isConfigurable(), NONE); |
| } |
| return obj; |
| } |
| |
| |
| // ES6 6.2.4.5 |
| function ToPropertyDescriptor(obj) { |
| if (!IS_RECEIVER(obj)) throw MakeTypeError(kPropertyDescObject, obj); |
| |
| var desc = new PropertyDescriptor(); |
| |
| if ("enumerable" in obj) { |
| desc.setEnumerable(TO_BOOLEAN(obj.enumerable)); |
| } |
| |
| if ("configurable" in obj) { |
| desc.setConfigurable(TO_BOOLEAN(obj.configurable)); |
| } |
| |
| if ("value" in obj) { |
| desc.setValue(obj.value); |
| } |
| |
| if ("writable" in obj) { |
| desc.setWritable(TO_BOOLEAN(obj.writable)); |
| } |
| |
| if ("get" in obj) { |
| var get = obj.get; |
| if (!IS_UNDEFINED(get) && !IS_CALLABLE(get)) { |
| throw MakeTypeError(kObjectGetterCallable, get); |
| } |
| desc.setGet(get); |
| } |
| |
| if ("set" in obj) { |
| var set = obj.set; |
| if (!IS_UNDEFINED(set) && !IS_CALLABLE(set)) { |
| throw MakeTypeError(kObjectSetterCallable, set); |
| } |
| desc.setSet(set); |
| } |
| |
| if (IsInconsistentDescriptor(desc)) { |
| throw MakeTypeError(kValueAndAccessor, obj); |
| } |
| return desc; |
| } |
| |
| // TODO(cbruni): remove once callers have been removed |
| function ToCompletePropertyDescriptor(obj) { |
| var desc = ToPropertyDescriptor(obj); |
| if (IsGenericDescriptor(desc) || IsDataDescriptor(desc)) { |
| if (!desc.hasValue()) desc.setValue(UNDEFINED); |
| if (!desc.hasWritable()) desc.setWritable(false); |
| } else { |
| // Is accessor descriptor. |
| if (!desc.hasGetter()) desc.setGet(UNDEFINED); |
| if (!desc.hasSetter()) desc.setSet(UNDEFINED); |
| } |
| if (!desc.hasEnumerable()) desc.setEnumerable(false); |
| if (!desc.hasConfigurable()) desc.setConfigurable(false); |
| return desc; |
| } |
| |
| |
| function PropertyDescriptor() { |
| // Initialize here so they are all in-object and have the same map. |
| // Default values from ES5 8.6.1. |
| this.value_ = UNDEFINED; |
| this.hasValue_ = false; |
| this.writable_ = false; |
| this.hasWritable_ = false; |
| this.enumerable_ = false; |
| this.hasEnumerable_ = false; |
| this.configurable_ = false; |
| this.hasConfigurable_ = false; |
| this.get_ = UNDEFINED; |
| this.hasGetter_ = false; |
| this.set_ = UNDEFINED; |
| this.hasSetter_ = false; |
| } |
| |
| utils.SetUpLockedPrototype(PropertyDescriptor, [ |
| "value_", |
| "hasValue_", |
| "writable_", |
| "hasWritable_", |
| "enumerable_", |
| "hasEnumerable_", |
| "configurable_", |
| "hasConfigurable_", |
| "get_", |
| "hasGetter_", |
| "set_", |
| "hasSetter_" |
| ], [ |
| "toString", function PropertyDescriptor_ToString() { |
| return "[object PropertyDescriptor]"; |
| }, |
| "setValue", function PropertyDescriptor_SetValue(value) { |
| this.value_ = value; |
| this.hasValue_ = true; |
| }, |
| "getValue", function PropertyDescriptor_GetValue() { |
| return this.value_; |
| }, |
| "hasValue", function PropertyDescriptor_HasValue() { |
| return this.hasValue_; |
| }, |
| "setEnumerable", function PropertyDescriptor_SetEnumerable(enumerable) { |
| this.enumerable_ = enumerable; |
| this.hasEnumerable_ = true; |
| }, |
| "isEnumerable", function PropertyDescriptor_IsEnumerable() { |
| return this.enumerable_; |
| }, |
| "hasEnumerable", function PropertyDescriptor_HasEnumerable() { |
| return this.hasEnumerable_; |
| }, |
| "setWritable", function PropertyDescriptor_SetWritable(writable) { |
| this.writable_ = writable; |
| this.hasWritable_ = true; |
| }, |
| "isWritable", function PropertyDescriptor_IsWritable() { |
| return this.writable_; |
| }, |
| "hasWritable", function PropertyDescriptor_HasWritable() { |
| return this.hasWritable_; |
| }, |
| "setConfigurable", |
| function PropertyDescriptor_SetConfigurable(configurable) { |
| this.configurable_ = configurable; |
| this.hasConfigurable_ = true; |
| }, |
| "hasConfigurable", function PropertyDescriptor_HasConfigurable() { |
| return this.hasConfigurable_; |
| }, |
| "isConfigurable", function PropertyDescriptor_IsConfigurable() { |
| return this.configurable_; |
| }, |
| "setGet", function PropertyDescriptor_SetGetter(get) { |
| this.get_ = get; |
| this.hasGetter_ = true; |
| }, |
| "getGet", function PropertyDescriptor_GetGetter() { |
| return this.get_; |
| }, |
| "hasGetter", function PropertyDescriptor_HasGetter() { |
| return this.hasGetter_; |
| }, |
| "setSet", function PropertyDescriptor_SetSetter(set) { |
| this.set_ = set; |
| this.hasSetter_ = true; |
| }, |
| "getSet", function PropertyDescriptor_GetSetter() { |
| return this.set_; |
| }, |
| "hasSetter", function PropertyDescriptor_HasSetter() { |
| return this.hasSetter_; |
| } |
| ]); |
| |
| |
| // Converts an array returned from Runtime_GetOwnProperty to an actual |
| // property descriptor. For a description of the array layout please |
| // see the runtime.cc file. |
| function ConvertDescriptorArrayToDescriptor(desc_array) { |
| if (IS_UNDEFINED(desc_array)) { |
| return UNDEFINED; |
| } |
| |
| var desc = new PropertyDescriptor(); |
| // This is an accessor. |
| if (desc_array[IS_ACCESSOR_INDEX]) { |
| desc.setGet(desc_array[GETTER_INDEX]); |
| desc.setSet(desc_array[SETTER_INDEX]); |
| } else { |
| desc.setValue(desc_array[VALUE_INDEX]); |
| desc.setWritable(desc_array[WRITABLE_INDEX]); |
| } |
| desc.setEnumerable(desc_array[ENUMERABLE_INDEX]); |
| desc.setConfigurable(desc_array[CONFIGURABLE_INDEX]); |
| |
| return desc; |
| } |
| |
| |
| // For Harmony proxies. |
| function GetTrap(handler, name, defaultTrap) { |
| var trap = handler[name]; |
| if (IS_UNDEFINED(trap)) { |
| if (IS_UNDEFINED(defaultTrap)) { |
| throw MakeTypeError(kIllegalInvocation); |
| } |
| trap = defaultTrap; |
| } else if (!IS_CALLABLE(trap)) { |
| throw MakeTypeError(kIllegalInvocation); |
| } |
| return trap; |
| } |
| |
| |
| function CallTrap1(handler, name, defaultTrap, x) { |
| return %_Call(GetTrap(handler, name, defaultTrap), handler, x); |
| } |
| |
| |
| function CallTrap2(handler, name, defaultTrap, x, y) { |
| return %_Call(GetTrap(handler, name, defaultTrap), handler, x, y); |
| } |
| |
| |
| // ES5 section 8.12.1. |
| // TODO(jkummerow): Deprecated. Migrate all callers to |
| // ObjectGetOwnPropertyDescriptor and delete this. |
| function GetOwnPropertyJS(obj, v) { |
| var p = TO_NAME(v); |
| if (IS_PROXY(obj)) { |
| // TODO(rossberg): adjust once there is a story for symbols vs proxies. |
| if (IS_SYMBOL(v)) return UNDEFINED; |
| |
| var handler = %JSProxyGetHandler(obj); |
| var descriptor = CallTrap1( |
| handler, "getOwnPropertyDescriptor", UNDEFINED, p); |
| if (IS_UNDEFINED(descriptor)) return descriptor; |
| var desc = ToCompletePropertyDescriptor(descriptor); |
| if (!desc.isConfigurable()) { |
| throw MakeTypeError(kIllegalInvocation); |
| } |
| return desc; |
| } |
| |
| // GetOwnProperty returns an array indexed by the constants |
| // defined in macros.py. |
| // If p is not a property on obj undefined is returned. |
| var props = %GetOwnProperty_Legacy(TO_OBJECT(obj), p); |
| |
| return ConvertDescriptorArrayToDescriptor(props); |
| } |
| |
| |
| // ES6 7.3.9 |
| function GetMethod(obj, p) { |
| var func = obj[p]; |
| if (IS_NULL_OR_UNDEFINED(func)) return UNDEFINED; |
| if (IS_CALLABLE(func)) return func; |
| throw MakeTypeError(kCalledNonCallable, typeof func); |
| } |
| |
| |
| // Harmony proxies. |
| function DefineProxyProperty(obj, p, attributes, should_throw) { |
| // TODO(rossberg): adjust once there is a story for symbols vs proxies. |
| if (IS_SYMBOL(p)) return false; |
| |
| var handler = %JSProxyGetHandler(obj); |
| var result = CallTrap2(handler, "defineProperty", UNDEFINED, p, attributes); |
| if (!result) { |
| if (should_throw) { |
| throw MakeTypeError(kIllegalInvocation); |
| } else { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| |
| // ES6 9.1.6 [[DefineOwnProperty]](P, Desc) |
| function DefineObjectProperty(obj, p, desc, should_throw) { |
| var current_array = %GetOwnProperty_Legacy(obj, TO_NAME(p)); |
| var current = ConvertDescriptorArrayToDescriptor(current_array); |
| var extensible = %object_is_extensible(obj); |
| |
| if (IS_UNDEFINED(current) && !extensible) { |
| if (should_throw) { |
| throw MakeTypeError(kDefineDisallowed, p); |
| } else { |
| return false; |
| } |
| } |
| |
| if (!IS_UNDEFINED(current)) { |
| if ((IsGenericDescriptor(desc) || |
| IsDataDescriptor(desc) == IsDataDescriptor(current)) && |
| (!desc.hasEnumerable() || |
| SameValue(desc.isEnumerable(), current.isEnumerable())) && |
| (!desc.hasConfigurable() || |
| SameValue(desc.isConfigurable(), current.isConfigurable())) && |
| (!desc.hasWritable() || |
| SameValue(desc.isWritable(), current.isWritable())) && |
| (!desc.hasValue() || |
| SameValue(desc.getValue(), current.getValue())) && |
| (!desc.hasGetter() || |
| SameValue(desc.getGet(), current.getGet())) && |
| (!desc.hasSetter() || |
| SameValue(desc.getSet(), current.getSet()))) { |
| return true; |
| } |
| if (!current.isConfigurable()) { |
| // Step 7 |
| if (desc.isConfigurable() || |
| (desc.hasEnumerable() && |
| desc.isEnumerable() != current.isEnumerable())) { |
| if (should_throw) { |
| throw MakeTypeError(kRedefineDisallowed, p); |
| } else { |
| return false; |
| } |
| } |
| // Step 8 |
| if (!IsGenericDescriptor(desc)) { |
| // Step 9a |
| if (IsDataDescriptor(current) != IsDataDescriptor(desc)) { |
| if (should_throw) { |
| throw MakeTypeError(kRedefineDisallowed, p); |
| } else { |
| return false; |
| } |
| } |
| // Step 10a |
| if (IsDataDescriptor(current) && IsDataDescriptor(desc)) { |
| var currentIsWritable = current.isWritable(); |
| if (currentIsWritable != desc.isWritable()) { |
| if (!currentIsWritable || IS_STRONG(obj)) { |
| if (should_throw) { |
| throw currentIsWritable |
| ? MakeTypeError(kStrongRedefineDisallowed, obj, p) |
| : MakeTypeError(kRedefineDisallowed, p); |
| } else { |
| return false; |
| } |
| } |
| } |
| if (!currentIsWritable && desc.hasValue() && |
| !SameValue(desc.getValue(), current.getValue())) { |
| if (should_throw) { |
| throw MakeTypeError(kRedefineDisallowed, p); |
| } else { |
| return false; |
| } |
| } |
| } |
| // Step 11 |
| if (IsAccessorDescriptor(desc) && IsAccessorDescriptor(current)) { |
| if (desc.hasSetter() && |
| !SameValue(desc.getSet(), current.getSet())) { |
| if (should_throw) { |
| throw MakeTypeError(kRedefineDisallowed, p); |
| } else { |
| return false; |
| } |
| } |
| if (desc.hasGetter() && !SameValue(desc.getGet(),current.getGet())) { |
| if (should_throw) { |
| throw MakeTypeError(kRedefineDisallowed, p); |
| } else { |
| return false; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| // Send flags - enumerable and configurable are common - writable is |
| // only send to the data descriptor. |
| // Take special care if enumerable and configurable is not defined on |
| // desc (we need to preserve the existing values from current). |
| var flag = NONE; |
| if (desc.hasEnumerable()) { |
| flag |= desc.isEnumerable() ? 0 : DONT_ENUM; |
| } else if (!IS_UNDEFINED(current)) { |
| flag |= current.isEnumerable() ? 0 : DONT_ENUM; |
| } else { |
| flag |= DONT_ENUM; |
| } |
| |
| if (desc.hasConfigurable()) { |
| flag |= desc.isConfigurable() ? 0 : DONT_DELETE; |
| } else if (!IS_UNDEFINED(current)) { |
| flag |= current.isConfigurable() ? 0 : DONT_DELETE; |
| } else |
| flag |= DONT_DELETE; |
| |
| if (IsDataDescriptor(desc) || |
| (IsGenericDescriptor(desc) && |
| (IS_UNDEFINED(current) || IsDataDescriptor(current)))) { |
| // There are 3 cases that lead here: |
| // Step 4a - defining a new data property. |
| // Steps 9b & 12 - replacing an existing accessor property with a data |
| // property. |
| // Step 12 - updating an existing data property with a data or generic |
| // descriptor. |
| |
| if (desc.hasWritable()) { |
| flag |= desc.isWritable() ? 0 : READ_ONLY; |
| } else if (!IS_UNDEFINED(current)) { |
| flag |= current.isWritable() ? 0 : READ_ONLY; |
| } else { |
| flag |= READ_ONLY; |
| } |
| |
| var value = UNDEFINED; // Default value is undefined. |
| if (desc.hasValue()) { |
| value = desc.getValue(); |
| } else if (!IS_UNDEFINED(current) && IsDataDescriptor(current)) { |
| value = current.getValue(); |
| } |
| |
| %DefineDataPropertyUnchecked(obj, p, value, flag); |
| } else { |
| // There are 3 cases that lead here: |
| // Step 4b - defining a new accessor property. |
| // Steps 9c & 12 - replacing an existing data property with an accessor |
| // property. |
| // Step 12 - updating an existing accessor property with an accessor |
| // descriptor. |
| var getter = null; |
| if (desc.hasGetter()) { |
| getter = desc.getGet(); |
| } else if (IsAccessorDescriptor(current) && current.hasGetter()) { |
| getter = current.getGet(); |
| } |
| var setter = null; |
| if (desc.hasSetter()) { |
| setter = desc.getSet(); |
| } else if (IsAccessorDescriptor(current) && current.hasSetter()) { |
| setter = current.getSet(); |
| } |
| %DefineAccessorPropertyUnchecked(obj, p, getter, setter, flag); |
| } |
| return true; |
| } |
| |
| |
| // ES5 section 15.4.5.1. |
| function DefineArrayProperty(obj, p, desc, should_throw) { |
| // Step 3 - Special handling for array index. |
| if (!IS_SYMBOL(p)) { |
| var index = TO_UINT32(p); |
| var emit_splice = false; |
| if (TO_STRING(index) == p && index != 4294967295) { |
| var length = obj.length; |
| if (index >= length && %IsObserved(obj)) { |
| emit_splice = true; |
| ObserveBeginPerformSplice(obj); |
| } |
| |
| var length_desc = GetOwnPropertyJS(obj, "length"); |
| if ((index >= length && !length_desc.isWritable()) || |
| !DefineObjectProperty(obj, p, desc, true)) { |
| if (emit_splice) |
| ObserveEndPerformSplice(obj); |
| if (should_throw) { |
| throw MakeTypeError(kDefineDisallowed, p); |
| } else { |
| return false; |
| } |
| } |
| if (index >= length) { |
| obj.length = index + 1; |
| } |
| if (emit_splice) { |
| ObserveEndPerformSplice(obj); |
| ObserveEnqueueSpliceRecord(obj, length, [], index + 1 - length); |
| } |
| return true; |
| } |
| } |
| |
| // Step 5 - Fallback to default implementation. |
| return DefineObjectProperty(obj, p, desc, should_throw); |
| } |
| |
| |
| // ES5 section 8.12.9, ES5 section 15.4.5.1 and Harmony proxies. |
| function DefineOwnProperty(obj, p, desc, should_throw) { |
| if (IS_PROXY(obj)) { |
| // TODO(rossberg): adjust once there is a story for symbols vs proxies. |
| if (IS_SYMBOL(p)) return false; |
| |
| var attributes = FromGenericPropertyDescriptor(desc); |
| return DefineProxyProperty(obj, p, attributes, should_throw); |
| } else if (IS_ARRAY(obj)) { |
| return DefineArrayProperty(obj, p, desc, should_throw); |
| } else { |
| return DefineObjectProperty(obj, p, desc, should_throw); |
| } |
| } |
| |
| |
| // ES6 section 19.1.2.9 |
| function ObjectGetPrototypeOf(obj) { |
| return %_GetPrototype(TO_OBJECT(obj)); |
| } |
| |
| // ES6 section 19.1.2.18. |
| function ObjectSetPrototypeOf(obj, proto) { |
| CHECK_OBJECT_COERCIBLE(obj, "Object.setPrototypeOf"); |
| |
| if (proto !== null && !IS_RECEIVER(proto)) { |
| throw MakeTypeError(kProtoObjectOrNull, proto); |
| } |
| |
| if (IS_RECEIVER(obj)) { |
| %SetPrototype(obj, proto); |
| } |
| |
| return obj; |
| } |
| |
| |
| // ES6 section 19.1.2.6 |
| function ObjectGetOwnPropertyDescriptor(obj, p) { |
| return %GetOwnProperty(obj, p); |
| } |
| |
| |
| // ES5 section 15.2.3.4. |
| function ObjectGetOwnPropertyNames(obj) { |
| obj = TO_OBJECT(obj); |
| return %GetOwnPropertyKeys(obj, PROPERTY_FILTER_SKIP_SYMBOLS); |
| } |
| |
| |
| // ES5 section 15.2.3.6. |
| function ObjectDefineProperty(obj, p, attributes) { |
| // The new pure-C++ implementation doesn't support O.o. |
| // TODO(jkummerow): Implement missing features and remove fallback path. |
| if (%IsObserved(obj)) { |
| if (!IS_RECEIVER(obj)) { |
| throw MakeTypeError(kCalledOnNonObject, "Object.defineProperty"); |
| } |
| var name = TO_NAME(p); |
| var desc = ToPropertyDescriptor(attributes); |
| DefineOwnProperty(obj, name, desc, true); |
| return obj; |
| } |
| return %ObjectDefineProperty(obj, p, attributes); |
| } |
| |
| |
| function GetOwnEnumerablePropertyNames(object) { |
| return %GetOwnPropertyKeys(object, PROPERTY_FILTER_ONLY_ENUMERABLE); |
| } |
| |
| |
| // ES5 section 15.2.3.7. |
| function ObjectDefineProperties(obj, properties) { |
| // The new pure-C++ implementation doesn't support O.o. |
| // TODO(jkummerow): Implement missing features and remove fallback path. |
| if (%IsObserved(obj)) { |
| if (!IS_RECEIVER(obj)) { |
| throw MakeTypeError(kCalledOnNonObject, "Object.defineProperties"); |
| } |
| var props = TO_OBJECT(properties); |
| var names = GetOwnEnumerablePropertyNames(props); |
| var descriptors = new InternalArray(); |
| for (var i = 0; i < names.length; i++) { |
| descriptors.push(ToPropertyDescriptor(props[names[i]])); |
| } |
| for (var i = 0; i < names.length; i++) { |
| DefineOwnProperty(obj, names[i], descriptors[i], true); |
| } |
| return obj; |
| } |
| return %ObjectDefineProperties(obj, properties); |
| } |
| |
| |
| // ES6 B.2.2.1.1 |
| function ObjectGetProto() { |
| return %_GetPrototype(TO_OBJECT(this)); |
| } |
| |
| |
| // ES6 B.2.2.1.2 |
| function ObjectSetProto(proto) { |
| CHECK_OBJECT_COERCIBLE(this, "Object.prototype.__proto__"); |
| |
| if ((IS_RECEIVER(proto) || IS_NULL(proto)) && IS_RECEIVER(this)) { |
| %SetPrototype(this, proto); |
| } |
| } |
| |
| |
| // ES6 19.1.1.1 |
| function ObjectConstructor(x) { |
| if (GlobalObject != new.target && !IS_UNDEFINED(new.target)) { |
| return this; |
| } |
| if (IS_NULL(x) || IS_UNDEFINED(x)) return {}; |
| return TO_OBJECT(x); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Object |
| |
| %SetNativeFlag(GlobalObject); |
| %SetCode(GlobalObject, ObjectConstructor); |
| |
| %AddNamedProperty(GlobalObject.prototype, "constructor", GlobalObject, |
| DONT_ENUM); |
| |
| // Set up non-enumerable functions on the Object.prototype object. |
| utils.InstallFunctions(GlobalObject.prototype, DONT_ENUM, [ |
| "toString", ObjectToString, |
| "toLocaleString", ObjectToLocaleString, |
| "valueOf", ObjectValueOf, |
| "hasOwnProperty", ObjectHasOwnProperty, |
| "isPrototypeOf", ObjectIsPrototypeOf, |
| "propertyIsEnumerable", ObjectPropertyIsEnumerable, |
| "__defineGetter__", ObjectDefineGetter, |
| "__lookupGetter__", ObjectLookupGetter, |
| "__defineSetter__", ObjectDefineSetter, |
| "__lookupSetter__", ObjectLookupSetter |
| ]); |
| utils.InstallGetterSetter(GlobalObject.prototype, "__proto__", ObjectGetProto, |
| ObjectSetProto); |
| |
| // Set up non-enumerable functions in the Object object. |
| utils.InstallFunctions(GlobalObject, DONT_ENUM, [ |
| // assign is added in bootstrapper.cc. |
| // keys is added in bootstrapper.cc. |
| "defineProperty", ObjectDefineProperty, |
| "defineProperties", ObjectDefineProperties, |
| "getPrototypeOf", ObjectGetPrototypeOf, |
| "setPrototypeOf", ObjectSetPrototypeOf, |
| "getOwnPropertyDescriptor", ObjectGetOwnPropertyDescriptor, |
| "getOwnPropertyNames", ObjectGetOwnPropertyNames, |
| // getOwnPropertySymbols is added in symbol.js. |
| "is", SameValue, // ECMA-262, Edition 6, section 19.1.2.10 |
| // deliverChangeRecords, getNotifier, observe and unobserve are added |
| // in object-observe.js. |
| ]); |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Boolean |
| |
| function BooleanConstructor(x) { |
| // TODO(bmeurer): Move this to toplevel. |
| "use strict"; |
| if (!IS_UNDEFINED(new.target)) { |
| %_SetValueOf(this, TO_BOOLEAN(x)); |
| } else { |
| return TO_BOOLEAN(x); |
| } |
| } |
| |
| |
| function BooleanToString() { |
| // NOTE: Both Boolean objects and values can enter here as |
| // 'this'. This is not as dictated by ECMA-262. |
| var b = this; |
| if (!IS_BOOLEAN(b)) { |
| if (!IS_BOOLEAN_WRAPPER(b)) { |
| throw MakeTypeError(kNotGeneric, 'Boolean.prototype.toString'); |
| } |
| b = %_ValueOf(b); |
| } |
| return b ? 'true' : 'false'; |
| } |
| |
| |
| function BooleanValueOf() { |
| // NOTE: Both Boolean objects and values can enter here as |
| // 'this'. This is not as dictated by ECMA-262. |
| if (!IS_BOOLEAN(this) && !IS_BOOLEAN_WRAPPER(this)) { |
| throw MakeTypeError(kNotGeneric, 'Boolean.prototype.valueOf'); |
| } |
| return %_ValueOf(this); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| |
| %SetCode(GlobalBoolean, BooleanConstructor); |
| %FunctionSetPrototype(GlobalBoolean, new GlobalBoolean(false)); |
| %AddNamedProperty(GlobalBoolean.prototype, "constructor", GlobalBoolean, |
| DONT_ENUM); |
| |
| utils.InstallFunctions(GlobalBoolean.prototype, DONT_ENUM, [ |
| "toString", BooleanToString, |
| "valueOf", BooleanValueOf |
| ]); |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Number |
| |
| // ES6 Number.prototype.toString([ radix ]) |
| function NumberToStringJS(radix) { |
| // NOTE: Both Number objects and values can enter here as |
| // 'this'. This is not as dictated by ECMA-262. |
| var number = this; |
| if (!IS_NUMBER(this)) { |
| if (!IS_NUMBER_WRAPPER(this)) { |
| throw MakeTypeError(kNotGeneric, 'Number.prototype.toString'); |
| } |
| // Get the value of this number in case it's an object. |
| number = %_ValueOf(this); |
| } |
| // Fast case: Convert number in radix 10. |
| if (IS_UNDEFINED(radix) || radix === 10) { |
| return %_NumberToString(number); |
| } |
| |
| // Convert the radix to an integer and check the range. |
| radix = TO_INTEGER(radix); |
| if (radix < 2 || radix > 36) throw MakeRangeError(kToRadixFormatRange); |
| // Convert the number to a string in the given radix. |
| return %NumberToRadixString(number, radix); |
| } |
| |
| |
| // ES6 20.1.3.4 Number.prototype.toLocaleString([reserved1 [, reserved2]]) |
| function NumberToLocaleString() { |
| return %_Call(NumberToStringJS, this); |
| } |
| |
| |
| // ES6 20.1.3.7 Number.prototype.valueOf() |
| function NumberValueOf() { |
| // NOTE: Both Number objects and values can enter here as |
| // 'this'. This is not as dictated by ECMA-262. |
| if (!IS_NUMBER(this) && !IS_NUMBER_WRAPPER(this)) { |
| throw MakeTypeError(kNotGeneric, 'Number.prototype.valueOf'); |
| } |
| return %_ValueOf(this); |
| } |
| |
| |
| // ES6 20.1.3.3 Number.prototype.toFixed(fractionDigits) |
| function NumberToFixedJS(fractionDigits) { |
| var x = this; |
| if (!IS_NUMBER(this)) { |
| if (!IS_NUMBER_WRAPPER(this)) { |
| throw MakeTypeError(kIncompatibleMethodReceiver, |
| "Number.prototype.toFixed", this); |
| } |
| // Get the value of this number in case it's an object. |
| x = %_ValueOf(this); |
| } |
| var f = TO_INTEGER(fractionDigits); |
| |
| if (f < 0 || f > 20) { |
| throw MakeRangeError(kNumberFormatRange, "toFixed() digits"); |
| } |
| |
| if (NUMBER_IS_NAN(x)) return "NaN"; |
| if (x == INFINITY) return "Infinity"; |
| if (x == -INFINITY) return "-Infinity"; |
| |
| return %NumberToFixed(x, f); |
| } |
| |
| |
| // ES6 20.1.3.2 Number.prototype.toExponential(fractionDigits) |
| function NumberToExponentialJS(fractionDigits) { |
| var x = this; |
| if (!IS_NUMBER(this)) { |
| if (!IS_NUMBER_WRAPPER(this)) { |
| throw MakeTypeError(kIncompatibleMethodReceiver, |
| "Number.prototype.toExponential", this); |
| } |
| // Get the value of this number in case it's an object. |
| x = %_ValueOf(this); |
| } |
| var f = IS_UNDEFINED(fractionDigits) ? UNDEFINED : TO_INTEGER(fractionDigits); |
| |
| if (NUMBER_IS_NAN(x)) return "NaN"; |
| if (x == INFINITY) return "Infinity"; |
| if (x == -INFINITY) return "-Infinity"; |
| |
| if (IS_UNDEFINED(f)) { |
| f = -1; // Signal for runtime function that f is not defined. |
| } else if (f < 0 || f > 20) { |
| throw MakeRangeError(kNumberFormatRange, "toExponential()"); |
| } |
| return %NumberToExponential(x, f); |
| } |
| |
| |
| // ES6 20.1.3.5 Number.prototype.toPrecision(precision) |
| function NumberToPrecisionJS(precision) { |
| var x = this; |
| if (!IS_NUMBER(this)) { |
| if (!IS_NUMBER_WRAPPER(this)) { |
| throw MakeTypeError(kIncompatibleMethodReceiver, |
| "Number.prototype.toPrecision", this); |
| } |
| // Get the value of this number in case it's an object. |
| x = %_ValueOf(this); |
| } |
| if (IS_UNDEFINED(precision)) return TO_STRING(x); |
| var p = TO_INTEGER(precision); |
| |
| if (NUMBER_IS_NAN(x)) return "NaN"; |
| if (x == INFINITY) return "Infinity"; |
| if (x == -INFINITY) return "-Infinity"; |
| |
| if (p < 1 || p > 21) { |
| throw MakeRangeError(kToPrecisionFormatRange); |
| } |
| return %NumberToPrecision(x, p); |
| } |
| |
| |
| // Harmony isFinite. |
| function NumberIsFinite(number) { |
| return IS_NUMBER(number) && NUMBER_IS_FINITE(number); |
| } |
| |
| |
| // Harmony isInteger |
| function NumberIsInteger(number) { |
| return NumberIsFinite(number) && TO_INTEGER(number) == number; |
| } |
| |
| |
| // Harmony isNaN. |
| function NumberIsNaN(number) { |
| return IS_NUMBER(number) && NUMBER_IS_NAN(number); |
| } |
| |
| |
| // Harmony isSafeInteger |
| function NumberIsSafeInteger(number) { |
| if (NumberIsFinite(number)) { |
| var integral = TO_INTEGER(number); |
| if (integral == number) { |
| return MathAbs(integral) <= kMaxSafeInteger; |
| } |
| } |
| return false; |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| |
| %FunctionSetPrototype(GlobalNumber, new GlobalNumber(0)); |
| |
| %OptimizeObjectForAddingMultipleProperties(GlobalNumber.prototype, 8); |
| // Set up the constructor property on the Number prototype object. |
| %AddNamedProperty(GlobalNumber.prototype, "constructor", GlobalNumber, |
| DONT_ENUM); |
| |
| utils.InstallConstants(GlobalNumber, [ |
| // ECMA-262 section 15.7.3.1. |
| "MAX_VALUE", 1.7976931348623157e+308, |
| // ECMA-262 section 15.7.3.2. |
| "MIN_VALUE", 5e-324, |
| // ECMA-262 section 15.7.3.3. |
| "NaN", NaN, |
| // ECMA-262 section 15.7.3.4. |
| "NEGATIVE_INFINITY", -INFINITY, |
| // ECMA-262 section 15.7.3.5. |
| "POSITIVE_INFINITY", INFINITY, |
| |
| // --- Harmony constants (no spec refs until settled.) |
| |
| "MAX_SAFE_INTEGER", %_MathPow(2, 53) - 1, |
| "MIN_SAFE_INTEGER", -%_MathPow(2, 53) + 1, |
| "EPSILON", %_MathPow(2, -52) |
| ]); |
| |
| // Set up non-enumerable functions on the Number prototype object. |
| utils.InstallFunctions(GlobalNumber.prototype, DONT_ENUM, [ |
| "toString", NumberToStringJS, |
| "toLocaleString", NumberToLocaleString, |
| "valueOf", NumberValueOf, |
| "toFixed", NumberToFixedJS, |
| "toExponential", NumberToExponentialJS, |
| "toPrecision", NumberToPrecisionJS |
| ]); |
| |
| // Harmony Number constructor additions |
| utils.InstallFunctions(GlobalNumber, DONT_ENUM, [ |
| "isFinite", NumberIsFinite, |
| "isInteger", NumberIsInteger, |
| "isNaN", NumberIsNaN, |
| "isSafeInteger", NumberIsSafeInteger, |
| "parseInt", GlobalParseInt, |
| "parseFloat", GlobalParseFloat |
| ]); |
| |
| %SetForceInlineFlag(NumberIsNaN); |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Iterator related spec functions. |
| |
| // ES6 7.4.1 GetIterator(obj, method) |
| function GetIterator(obj, method) { |
| if (IS_UNDEFINED(method)) { |
| method = obj[iteratorSymbol]; |
| } |
| if (!IS_CALLABLE(method)) { |
| throw MakeTypeError(kNotIterable, obj); |
| } |
| var iterator = %_Call(method, obj); |
| if (!IS_RECEIVER(iterator)) { |
| throw MakeTypeError(kNotAnIterator, iterator); |
| } |
| return iterator; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Exports |
| |
| utils.Export(function(to) { |
| to.GetIterator = GetIterator; |
| to.GetMethod = GetMethod; |
| to.IsFinite = GlobalIsFinite; |
| to.IsNaN = GlobalIsNaN; |
| to.NumberIsNaN = NumberIsNaN; |
| to.ObjectDefineProperties = ObjectDefineProperties; |
| to.ObjectDefineProperty = ObjectDefineProperty; |
| to.ObjectHasOwnProperty = ObjectHasOwnProperty; |
| }); |
| |
| %InstallToContext([ |
| "object_value_of", ObjectValueOf, |
| ]); |
| |
| }) |