// Copyright 2006-2008 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // This file relies on the fact that the following declarations have been made // // in runtime.js: // const $Object = global.Object; // const $Boolean = global.Boolean; // const $Number = global.Number; // const $Function = global.Function; // const $Array = global.Array; // const $NaN = 0/0; // // in math.js: // const $floor = MathFloor const $isNaN = GlobalIsNaN; const $isFinite = GlobalIsFinite; // ---------------------------------------------------------------------------- // Helper function used to install functions on objects. function InstallFunctions(object, attributes, functions) { if (functions.length >= 8) { %OptimizeObjectForAddingMultipleProperties(object, functions.length >> 1); } for (var i = 0; i < functions.length; i += 2) { var key = functions[i]; var f = functions[i + 1]; %FunctionSetName(f, key); %SetProperty(object, key, f, attributes); } %ToFastProperties(object); } // Emulates JSC by installing functions on a hidden prototype that // lies above the current object/prototype. This lets you override // functions on String.prototype etc. and then restore the old function // with delete. See http://code.google.com/p/chromium/issues/detail?id=1717 function InstallFunctionsOnHiddenPrototype(object, attributes, functions) { var hidden_prototype = new $Object(); %SetHiddenPrototype(object, hidden_prototype); InstallFunctions(hidden_prototype, attributes, functions); } // ---------------------------------------------------------------------------- // ECMA 262 - 15.1.4 function GlobalIsNaN(number) { var n = ToNumber(number); return NUMBER_IS_NAN(n); } // ECMA 262 - 15.1.5 function GlobalIsFinite(number) { return %NumberIsFinite(ToNumber(number)); } // ECMA-262 - 15.1.2.2 function GlobalParseInt(string, radix) { if (IS_UNDEFINED(radix)) { // 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; } radix = 0; } else { radix = TO_INT32(radix); if (!(radix == 0 || (2 <= radix && radix <= 36))) return $NaN; } return %StringParseInt(ToString(string), radix); } // ECMA-262 - 15.1.2.3 function GlobalParseFloat(string) { return %StringParseFloat(ToString(string)); } function GlobalEval(x) { if (!IS_STRING(x)) return x; var global_receiver = %GlobalReceiver(global); var this_is_global_receiver = (this === global_receiver); var global_is_detached = (global === global_receiver); if (!this_is_global_receiver || global_is_detached) { throw new $EvalError('The "this" object passed to eval must ' + 'be the global object from which eval originated'); } var f = %CompileString(x, false); if (!IS_FUNCTION(f)) return f; return f.call(this); } // execScript for IE compatibility. function GlobalExecScript(expr, lang) { // NOTE: We don't care about the character casing. if (!lang || /javascript/i.test(lang)) { var f = %CompileString(ToString(expr), false); f.call(%GlobalReceiver(global)); } return null; } // ---------------------------------------------------------------------------- function SetupGlobal() { // ECMA 262 - 15.1.1.1. %SetProperty(global, "NaN", $NaN, DONT_ENUM | DONT_DELETE); // ECMA-262 - 15.1.1.2. %SetProperty(global, "Infinity", 1/0, DONT_ENUM | DONT_DELETE); // ECMA-262 - 15.1.1.3. %SetProperty(global, "undefined", void 0, DONT_ENUM | DONT_DELETE); // Setup non-enumerable function on the global object. InstallFunctions(global, DONT_ENUM, $Array( "isNaN", GlobalIsNaN, "isFinite", GlobalIsFinite, "parseInt", GlobalParseInt, "parseFloat", GlobalParseFloat, "eval", GlobalEval, "execScript", GlobalExecScript )); } SetupGlobal(); // ---------------------------------------------------------------------------- // Boolean (first part of definition) %SetCode($Boolean, function(x) { if (%_IsConstructCall()) { %_SetValueOf(this, ToBoolean(x)); } else { return ToBoolean(x); } }); %FunctionSetPrototype($Boolean, new $Boolean(false)); %SetProperty($Boolean.prototype, "constructor", $Boolean, DONT_ENUM); // ---------------------------------------------------------------------------- // Object $Object.prototype.constructor = $Object; // ECMA-262 - 15.2.4.2 function ObjectToString() { return "[object " + %_ClassOf(ToObject(this)) + "]"; } // ECMA-262 - 15.2.4.3 function ObjectToLocaleString() { return this.toString(); } // ECMA-262 - 15.2.4.4 function ObjectValueOf() { return ToObject(this); } // ECMA-262 - 15.2.4.5 function ObjectHasOwnProperty(V) { return %HasLocalProperty(ToObject(this), ToString(V)); } // ECMA-262 - 15.2.4.6 function ObjectIsPrototypeOf(V) { if (!IS_OBJECT(V) && !IS_FUNCTION(V)) return false; return %IsInPrototypeChain(this, V); } // ECMA-262 - 15.2.4.6 function ObjectPropertyIsEnumerable(V) { if (this == null) return false; if (!IS_OBJECT(this) && !IS_FUNCTION(this)) return false; return %IsPropertyEnumerable(this, ToString(V)); } // Extensions for providing property getters and setters. function ObjectDefineGetter(name, fun) { if (this == null) { throw new $TypeError('Object.prototype.__defineGetter__: this is Null'); } if (!IS_FUNCTION(fun)) { throw new $TypeError('Object.prototype.__defineGetter__: Expecting function'); } return %DefineAccessor(ToObject(this), ToString(name), GETTER, fun); } function ObjectLookupGetter(name) { if (this == null) { throw new $TypeError('Object.prototype.__lookupGetter__: this is Null'); } return %LookupAccessor(ToObject(this), ToString(name), GETTER); } function ObjectDefineSetter(name, fun) { if (this == null) { throw new $TypeError('Object.prototype.__defineSetter__: this is Null'); } if (!IS_FUNCTION(fun)) { throw new $TypeError( 'Object.prototype.__defineSetter__: Expecting function'); } return %DefineAccessor(ToObject(this), ToString(name), SETTER, fun); } function ObjectLookupSetter(name) { if (this == null) { throw new $TypeError('Object.prototype.__lookupSetter__: this is Null'); } return %LookupAccessor(ToObject(this), ToString(name), SETTER); } function ObjectKeys(obj) { if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj)) throw MakeTypeError("obj_ctor_property_non_object", ["keys"]); return %LocalKeys(obj); } // ES5 8.10.1. function IsAccessorDescriptor(desc) { if (IS_UNDEFINED(desc)) return false; return desc.hasGetter_ || desc.hasSetter_; } // ES5 8.10.2. function IsDataDescriptor(desc) { if (IS_UNDEFINED(desc)) return false; return desc.hasValue_ || desc.hasWritable_; } // ES5 8.10.3. function IsGenericDescriptor(desc) { return !(IsAccessorDescriptor(desc) || IsDataDescriptor(desc)); } function IsInconsistentDescriptor(desc) { return IsAccessorDescriptor(desc) && IsDataDescriptor(desc); } // ES5 8.10.4 function FromPropertyDescriptor(desc) { if (IS_UNDEFINED(desc)) return desc; var obj = new $Object(); if (IsDataDescriptor(desc)) { obj.value = desc.getValue(); obj.writable = desc.isWritable(); } if (IsAccessorDescriptor(desc)) { obj.get = desc.getGet(); obj.set = desc.getSet(); } obj.enumerable = desc.isEnumerable(); obj.configurable = desc.isConfigurable(); return obj; } // ES5 8.10.5. function ToPropertyDescriptor(obj) { if (!IS_OBJECT(obj)) { throw MakeTypeError("property_desc_object", [obj]); } var desc = new PropertyDescriptor(); if ("enumerable" in obj) { desc.setEnumerable(ToBoolean(obj.enumerable)); } if ("configurable" in obj) { desc.setConfigurable(ToBoolean(obj.configurable)); } if ("value" in obj) { desc.setValue(obj.value); } if ("writable" in obj) { desc.setWritable(ToBoolean(obj.writable)); } if ("get" in obj) { var get = obj.get; if (!IS_UNDEFINED(get) && !IS_FUNCTION(get)) { throw MakeTypeError("getter_must_be_callable", [get]); } desc.setGet(get); } if ("set" in obj) { var set = obj.set; if (!IS_UNDEFINED(set) && !IS_FUNCTION(set)) { throw MakeTypeError("setter_must_be_callable", [set]); } desc.setSet(set); } if (IsInconsistentDescriptor(desc)) { throw MakeTypeError("value_and_accessor", [obj]); } 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_ = void 0; this.hasValue_ = false; this.writable_ = false; this.hasWritable_ = false; this.enumerable_ = false; this.hasEnumerable_ = false; this.configurable_ = false; this.hasConfigurable_ = false; this.get_ = void 0; this.hasGetter_ = false; this.set_ = void 0; this.hasSetter_ = false; } PropertyDescriptor.prototype.setValue = function(value) { this.value_ = value; this.hasValue_ = true; } PropertyDescriptor.prototype.getValue = function() { return this.value_; } PropertyDescriptor.prototype.hasValue = function() { return this.hasValue_; } PropertyDescriptor.prototype.setEnumerable = function(enumerable) { this.enumerable_ = enumerable; this.hasEnumerable_ = true; } PropertyDescriptor.prototype.isEnumerable = function () { return this.enumerable_; } PropertyDescriptor.prototype.hasEnumerable = function() { return this.hasEnumerable_; } PropertyDescriptor.prototype.setWritable = function(writable) { this.writable_ = writable; this.hasWritable_ = true; } PropertyDescriptor.prototype.isWritable = function() { return this.writable_; } PropertyDescriptor.prototype.setConfigurable = function(configurable) { this.configurable_ = configurable; this.hasConfigurable_ = true; } PropertyDescriptor.prototype.hasConfigurable = function() { return this.hasConfigurable_; } PropertyDescriptor.prototype.isConfigurable = function() { return this.configurable_; } PropertyDescriptor.prototype.setGet = function(get) { this.get_ = get; this.hasGetter_ = true; } PropertyDescriptor.prototype.getGet = function() { return this.get_; } PropertyDescriptor.prototype.hasGetter = function() { return this.hasGetter_; } PropertyDescriptor.prototype.setSet = function(set) { this.set_ = set; this.hasSetter_ = true; } PropertyDescriptor.prototype.getSet = function() { return this.set_; } PropertyDescriptor.prototype.hasSetter = function() { return this.hasSetter_; } // ES5 section 8.12.1. function GetOwnProperty(obj, p) { var desc = new PropertyDescriptor(); // An array with: // obj is a data property [false, value, Writeable, Enumerable, Configurable] // obj is an accessor [true, Get, Set, Enumerable, Configurable] var props = %GetOwnProperty(ToObject(obj), ToString(p)); if (IS_UNDEFINED(props)) return void 0; // This is an accessor if (props[0]) { desc.setGet(props[1]); desc.setSet(props[2]); } else { desc.setValue(props[1]); desc.setWritable(props[2]); } desc.setEnumerable(props[3]); desc.setConfigurable(props[4]); return desc; } // ES5 section 8.12.2. function GetProperty(obj, p) { var prop = GetOwnProperty(obj); if (!IS_UNDEFINED(prop)) return prop; var proto = obj.__proto__; if (IS_NULL(proto)) return void 0; return GetProperty(proto, p); } // ES5 section 8.12.6 function HasProperty(obj, p) { var desc = GetProperty(obj, p); return IS_UNDEFINED(desc) ? false : true; } // ES5 8.12.9. function DefineOwnProperty(obj, p, desc, should_throw) { var current = GetOwnProperty(obj, p); var extensible = %IsExtensible(ToObject(obj)); // Error handling according to spec. // Step 3 if (IS_UNDEFINED(current) && !extensible) throw MakeTypeError("define_disallowed", ["defineProperty"]); if (!IS_UNDEFINED(current) && !current.isConfigurable()) { // Step 7 if (desc.isConfigurable() || desc.isEnumerable() != current.isEnumerable()) throw MakeTypeError("redefine_disallowed", ["defineProperty"]); // Step 9 if (IsDataDescriptor(current) != IsDataDescriptor(desc)) throw MakeTypeError("redefine_disallowed", ["defineProperty"]); // Step 10 if (IsDataDescriptor(current) && IsDataDescriptor(desc)) { if (!current.isWritable() && desc.isWritable()) throw MakeTypeError("redefine_disallowed", ["defineProperty"]); if (!current.isWritable() && desc.hasValue() && !SameValue(desc.getValue(), current.getValue())) { throw MakeTypeError("redefine_disallowed", ["defineProperty"]); } } // Step 11 if (IsAccessorDescriptor(desc) && IsAccessorDescriptor(current)) { if (desc.hasSetter() && !SameValue(desc.getSet(), current.getSet())){ throw MakeTypeError("redefine_disallowed", ["defineProperty"]); } if (desc.hasGetter() && !SameValue(desc.getGet(),current.getGet())) throw MakeTypeError("redefine_disallowed", ["defineProperty"]); } } // 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)) { flag |= desc.isWritable() ? 0 : READ_ONLY; %DefineOrRedefineDataProperty(obj, p, desc.getValue(), flag); } else { if (desc.hasGetter() && IS_FUNCTION(desc.getGet())) { %DefineOrRedefineAccessorProperty(obj, p, GETTER, desc.getGet(), flag); } if (desc.hasSetter() && IS_FUNCTION(desc.getSet())) { %DefineOrRedefineAccessorProperty(obj, p, SETTER, desc.getSet(), flag); } } return true; } // ES5 section 15.2.3.2. function ObjectGetPrototypeOf(obj) { if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj)) throw MakeTypeError("obj_ctor_property_non_object", ["getPrototypeOf"]); return obj.__proto__; } // ES5 section 15.2.3.3 function ObjectGetOwnPropertyDescriptor(obj, p) { if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj)) throw MakeTypeError("obj_ctor_property_non_object", ["getOwnPropertyDescriptor"]); var desc = GetOwnProperty(obj, p); return FromPropertyDescriptor(desc); } // ES5 section 15.2.3.4. function ObjectGetOwnPropertyNames(obj) { if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj)) throw MakeTypeError("obj_ctor_property_non_object", ["getOwnPropertyNames"]); // Find all the indexed properties. // Get the local element names. var propertyNames = %GetLocalElementNames(obj); // Get names for indexed interceptor properties. if (%GetInterceptorInfo(obj) & 1) { var indexedInterceptorNames = %GetIndexedInterceptorElementNames(obj); if (indexedInterceptorNames) propertyNames = propertyNames.concat(indexedInterceptorNames); } // Find all the named properties. // Get the local property names. propertyNames = propertyNames.concat(%GetLocalPropertyNames(obj)); // Get names for named interceptor properties if any. if (%GetInterceptorInfo(obj) & 2) { var namedInterceptorNames = %GetNamedInterceptorPropertyNames(obj); if (namedInterceptorNames) { propertyNames = propertyNames.concat(namedInterceptorNames); } } // Property names are expected to be strings. for (var i = 0; i < propertyNames.length; ++i) propertyNames[i] = ToString(propertyNames[i]); return propertyNames; } // ES5 section 15.2.3.5. function ObjectCreate(proto, properties) { if (!IS_OBJECT(proto) && !IS_NULL(proto)) { throw MakeTypeError("proto_object_or_null", [proto]); } var obj = new $Object(); obj.__proto__ = proto; if (!IS_UNDEFINED(properties)) ObjectDefineProperties(obj, properties); return obj; } // ES5 section 15.2.3.6. function ObjectDefineProperty(obj, p, attributes) { if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj)) throw MakeTypeError("obj_ctor_property_non_object", ["defineProperty"]); var name = ToString(p); var desc = ToPropertyDescriptor(attributes); DefineOwnProperty(obj, name, desc, true); return obj; } // ES5 section 15.2.3.7. function ObjectDefineProperties(obj, properties) { if ((!IS_OBJECT(obj) || IS_NULL_OR_UNDEFINED(obj)) && !IS_FUNCTION(obj)) throw MakeTypeError("obj_ctor_property_non_object", ["defineProperties"]); var props = ToObject(properties); var key_values = []; for (var key in props) { if (%HasLocalProperty(props, key)) { key_values.push(key); var value = props[key]; var desc = ToPropertyDescriptor(value); key_values.push(desc); } } for (var i = 0; i < key_values.length; i += 2) { var key = key_values[i]; var desc = key_values[i + 1]; DefineOwnProperty(obj, key, desc, true); } return obj; } %SetCode($Object, function(x) { if (%_IsConstructCall()) { if (x == null) return this; return ToObject(x); } else { if (x == null) return { }; return ToObject(x); } }); // ---------------------------------------------------------------------------- function SetupObject() { // Setup non-enumerable functions on the Object.prototype object. InstallFunctions($Object.prototype, DONT_ENUM, $Array( "toString", ObjectToString, "toLocaleString", ObjectToLocaleString, "valueOf", ObjectValueOf, "hasOwnProperty", ObjectHasOwnProperty, "isPrototypeOf", ObjectIsPrototypeOf, "propertyIsEnumerable", ObjectPropertyIsEnumerable, "__defineGetter__", ObjectDefineGetter, "__lookupGetter__", ObjectLookupGetter, "__defineSetter__", ObjectDefineSetter, "__lookupSetter__", ObjectLookupSetter )); InstallFunctions($Object, DONT_ENUM, $Array( "keys", ObjectKeys, "create", ObjectCreate, "defineProperty", ObjectDefineProperty, "defineProperties", ObjectDefineProperties, "getPrototypeOf", ObjectGetPrototypeOf, "getOwnPropertyDescriptor", ObjectGetOwnPropertyDescriptor, "getOwnPropertyNames", ObjectGetOwnPropertyNames )); } SetupObject(); // ---------------------------------------------------------------------------- // Boolean function BooleanToString() { // 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 new $TypeError('Boolean.prototype.toString is not generic'); return ToString(%_ValueOf(this)); } 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 new $TypeError('Boolean.prototype.valueOf is not generic'); return %_ValueOf(this); } function BooleanToJSON(key) { return CheckJSONPrimitive(this.valueOf()); } // ---------------------------------------------------------------------------- function SetupBoolean() { InstallFunctions($Boolean.prototype, DONT_ENUM, $Array( "toString", BooleanToString, "valueOf", BooleanValueOf, "toJSON", BooleanToJSON )); } SetupBoolean(); // ---------------------------------------------------------------------------- // Number // Set the Number function and constructor. %SetCode($Number, function(x) { var value = %_ArgumentsLength() == 0 ? 0 : ToNumber(x); if (%_IsConstructCall()) { %_SetValueOf(this, value); } else { return value; } }); %FunctionSetPrototype($Number, new $Number(0)); // ECMA-262 section 15.7.4.2. function NumberToString(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 new $TypeError('Number.prototype.toString is not generic'); // 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 ToString(number); } // Convert the radix to an integer and check the range. radix = TO_INTEGER(radix); if (radix < 2 || radix > 36) { throw new $RangeError('toString() radix argument must be between 2 and 36'); } // Convert the number to a string in the given radix. return %NumberToRadixString(number, radix); } // ECMA-262 section 15.7.4.3 function NumberToLocaleString() { return this.toString(); } // ECMA-262 section 15.7.4.4 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 new $TypeError('Number.prototype.valueOf is not generic'); return %_ValueOf(this); } // ECMA-262 section 15.7.4.5 function NumberToFixed(fractionDigits) { var f = TO_INTEGER(fractionDigits); if (f < 0 || f > 20) { throw new $RangeError("toFixed() digits argument must be between 0 and 20"); } var x = ToNumber(this); return %NumberToFixed(x, f); } // ECMA-262 section 15.7.4.6 function NumberToExponential(fractionDigits) { var f = -1; if (!IS_UNDEFINED(fractionDigits)) { f = TO_INTEGER(fractionDigits); if (f < 0 || f > 20) { throw new $RangeError("toExponential() argument must be between 0 and 20"); } } var x = ToNumber(this); return %NumberToExponential(x, f); } // ECMA-262 section 15.7.4.7 function NumberToPrecision(precision) { if (IS_UNDEFINED(precision)) return ToString(%_ValueOf(this)); var p = TO_INTEGER(precision); if (p < 1 || p > 21) { throw new $RangeError("toPrecision() argument must be between 1 and 21"); } var x = ToNumber(this); return %NumberToPrecision(x, p); } function CheckJSONPrimitive(val) { if (!IsPrimitive(val)) throw MakeTypeError('result_not_primitive', ['toJSON', val]); return val; } function NumberToJSON(key) { return CheckJSONPrimitive(this.valueOf()); } // ---------------------------------------------------------------------------- function SetupNumber() { %OptimizeObjectForAddingMultipleProperties($Number.prototype, 8); // Setup the constructor property on the Number prototype object. %SetProperty($Number.prototype, "constructor", $Number, DONT_ENUM); %OptimizeObjectForAddingMultipleProperties($Number, 5); // ECMA-262 section 15.7.3.1. %SetProperty($Number, "MAX_VALUE", 1.7976931348623157e+308, DONT_ENUM | DONT_DELETE | READ_ONLY); // ECMA-262 section 15.7.3.2. %SetProperty($Number, "MIN_VALUE", 5e-324, DONT_ENUM | DONT_DELETE | READ_ONLY); // ECMA-262 section 15.7.3.3. %SetProperty($Number, "NaN", $NaN, DONT_ENUM | DONT_DELETE | READ_ONLY); // ECMA-262 section 15.7.3.4. %SetProperty($Number, "NEGATIVE_INFINITY", -1/0, DONT_ENUM | DONT_DELETE | READ_ONLY); // ECMA-262 section 15.7.3.5. %SetProperty($Number, "POSITIVE_INFINITY", 1/0, DONT_ENUM | DONT_DELETE | READ_ONLY); %ToFastProperties($Number); // Setup non-enumerable functions on the Number prototype object. InstallFunctions($Number.prototype, DONT_ENUM, $Array( "toString", NumberToString, "toLocaleString", NumberToLocaleString, "valueOf", NumberValueOf, "toFixed", NumberToFixed, "toExponential", NumberToExponential, "toPrecision", NumberToPrecision, "toJSON", NumberToJSON )); } SetupNumber(); // ---------------------------------------------------------------------------- // Function $Function.prototype.constructor = $Function; function FunctionSourceString(func) { if (!IS_FUNCTION(func)) { throw new $TypeError('Function.prototype.toString is not generic'); } var source = %FunctionGetSourceCode(func); if (!IS_STRING(source) || %FunctionIsBuiltin(func)) { var name = %FunctionGetName(func); if (name) { // Mimic what KJS does. return 'function ' + name + '() { [native code] }'; } else { return 'function () { [native code] }'; } } var name = %FunctionGetName(func); return 'function ' + name + source; } function FunctionToString() { return FunctionSourceString(this); } function NewFunction(arg1) { // length == 1 var n = %_ArgumentsLength(); var p = ''; if (n > 1) { p = new $Array(n - 1); // Explicitly convert all parameters to strings. // Array.prototype.join replaces null with empty strings which is // not appropriate. for (var i = 0; i < n - 1; i++) p[i] = ToString(%_Arguments(i)); p = p.join(','); // If the formal parameters string include ) - an illegal // character - it may make the combined function expression // compile. We avoid this problem by checking for this early on. if (p.indexOf(')') != -1) throw MakeSyntaxError('unable_to_parse',[]); } var body = (n > 0) ? ToString(%_Arguments(n - 1)) : ''; var source = '(function(' + p + ') {\n' + body + '\n})'; // The call to SetNewFunctionAttributes will ensure the prototype // property of the resulting function is enumerable (ECMA262, 15.3.5.2). var f = %CompileString(source, false)(); %FunctionSetName(f, "anonymous"); return %SetNewFunctionAttributes(f); } %SetCode($Function, NewFunction); // ---------------------------------------------------------------------------- function SetupFunction() { InstallFunctions($Function.prototype, DONT_ENUM, $Array( "toString", FunctionToString )); } SetupFunction();