| // 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 GlobalNumber = global.Number; |
| var GlobalObject = global.Object; |
| 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 toStringTagSymbol = utils.ImportNow("to_string_tag_symbol"); |
| |
| utils.Import(function(from) { |
| MakeRangeError = from.MakeRangeError; |
| MakeSyntaxError = from.MakeSyntaxError; |
| MakeTypeError = from.MakeTypeError; |
| MathAbs = from.MathAbs; |
| }); |
| |
| // ---------------------------------------------------------------------------- |
| |
| |
| // 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 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); |
| } |
| |
| // 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); |
| } |
| |
| // 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 B.2.2.1.1 |
| function ObjectGetProto() { |
| return %object_get_prototype_of(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, |
| "isPrototypeOf", ObjectIsPrototypeOf, |
| "propertyIsEnumerable", ObjectPropertyIsEnumerable, |
| // __defineGetter__ is added in bootstrapper.cc. |
| // __lookupGetter__ is added in bootstrapper.cc. |
| // __defineSetter__ is added in bootstrapper.cc. |
| // __lookupSetter__ is added in bootstrapper.cc. |
| ]); |
| utils.InstallGetterSetter( |
| GlobalObject.prototype, "__proto__", ObjectGetProto, ObjectSetProto); |
| |
| // Set up non-enumerable functions in the Object object. |
| utils.InstallFunctions(GlobalObject, DONT_ENUM, [ |
| "setPrototypeOf", ObjectSetPrototypeOf, |
| // getOwnPropertySymbols is added in symbol.js. |
| // Others are added in bootstrapper.cc. |
| ]); |
| |
| |
| |
| // ---------------------------------------------------------------------------- |
| // 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.IsNaN = GlobalIsNaN; |
| to.NumberIsNaN = NumberIsNaN; |
| to.NumberIsInteger = NumberIsInteger; |
| to.ObjectHasOwnProperty = GlobalObject.prototype.hasOwnProperty; |
| }); |
| |
| %InstallToContext([ |
| "object_value_of", ObjectValueOf, |
| ]); |
| |
| }) |