| // 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) { |
| 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); |
| } |
| } |
| |
| // 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 (radix === void 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) && |
| ((string < -0.01 && -1e9 < string) || |
| (0.01 < string && string < 1e9))) { |
| // 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; |
| |
| if (this !== global && this !== %GlobalReceiver(global)) { |
| 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() { |
| var c = %ClassOf(this); |
| // Hide Arguments from the outside. |
| if (c === 'Arguments') c = 'Object'; |
| return "[object " + c + "]"; |
| } |
| |
| |
| // ECMA-262 - 15.2.4.3 |
| function ObjectToLocaleString() { |
| return this.toString(); |
| } |
| |
| |
| // ECMA-262 - 15.2.4.4 |
| function ObjectValueOf() { |
| return 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 $TypeError('Object.prototype.__lookupSetter__: this is Null'); |
| } |
| return %LookupAccessor(ToObject(this), ToString(name), SETTER); |
| } |
| |
| |
| %SetCode($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 |
| )); |
| } |
| |
| 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) && !%HasBooleanClass(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) && !%HasBooleanClass(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 (!%HasNumberClass(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) && !%HasNumberClass(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 $RangeError("toPrecision() argument must be between 1 and 21"); |
| } |
| var x = ToNumber(this); |
| return %NumberToPrecision(x, p); |
| } |
| |
| |
| function CheckJSONPrimitive(val) { |
| if (!IsPrimitive(val)) |
| throw MakeTypeError('result_not_primitive', ['toJSON', val]); |
| return val; |
| } |
| |
| |
| function NumberToJSON(key) { |
| return CheckJSONPrimitive(this.valueOf()); |
| } |
| |
| |
| // ---------------------------------------------------------------------------- |
| |
| function SetupNumber() { |
| // Setup the constructor property on the Number prototype object. |
| %SetProperty($Number.prototype, "constructor", $Number, DONT_ENUM); |
| |
| // ECMA-262 section 15.7.3.1. |
| %SetProperty($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($Number, |
| "POSITIVE_INFINITY", |
| 1/0, |
| DONT_ENUM | DONT_DELETE | READ_ONLY); |
| |
| // Setup non-enumerable functions on the Number prototype object. |
| InstallFunctions($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) { |
| // NOTE: Both Function objects and values can enter here as |
| // 'func'. This is not as dictated by ECMA-262. |
| if (!IS_FUNCTION(func) && !%HasFunctionClass(func)) |
| throw new $TypeError('Function.prototype.toString is not generic'); |
| |
| var source = %FunctionGetSourceCode(func); |
| if (!IS_STRING(source)) { |
| var name = %FunctionGetName(func); |
| if (name) { |
| // Mimic what KJS does. |
| return 'function ' + name + '() { [native code] }'; |
| } else { |
| return 'function () { [native code] }'; |
| } |
| } |
| |
| // Censor occurrences of internal calls. We do that for all |
| // functions and don't cache under the assumption that people rarly |
| // convert functions to strings. Note that we (apparently) can't |
| // use regular expression literals in natives files. |
| var regexp = ORIGINAL_REGEXP("%(\\w+\\()", "gm"); |
| if (source.match(regexp)) source = source.replace(regexp, "$1"); |
| 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(); |
| |