2008-07-05 Sam Weinig <sam@webkit.org>

        Reviewed by Cameron Zwarich.

        First step in broad cleanup effort.

        [ File list elided ]



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@35022 268f45cc-cd09-0410-ab3c-d52691b4dbfc

JavaScriptCore/ChangeLog

+2008-07-05  Sam Weinig  <sam@webkit.org>
+
+        Reviewed by Cameron Zwarich.
+
+        First step in broad cleanup effort.
+
+        [ File list elided ]
+
 2008-07-05  Sam Weinig  <sam@webkit.org>
 
         Rubber-stamped by Cameron Zwarich.

JavaScriptCore/JavaScriptCore.xcodeproj/project.pbxproj

@@ -1090,10 +1090,10 @@
 				F68EBB8C0255D4C601FF60F7 /* config.h */,
 				BC8F3CCF0DAF17BA00577A80 /* ConstructData.h */,
 				F692A8540255597D01FF60F7 /* create_hash_table */,
-				BC1166000E1997B1008066DD /* DateInstance.cpp */,
-				BC1166010E1997B1008066DD /* DateInstance.h */,
 				BCD203450E17135E002C7E82 /* DateConstructor.cpp */,
 				BCD203460E17135E002C7E82 /* DateConstructor.h */,
+				BC1166000E1997B1008066DD /* DateInstance.cpp */,
+				BC1166010E1997B1008066DD /* DateInstance.h */,
 				BCD203470E17135E002C7E82 /* DatePrototype.cpp */,
 				BCD203480E17135E002C7E82 /* DatePrototype.h */,
 				D21202280AD4310C00ED79B6 /* DateMath.cpp */,

JavaScriptCore/VM/Machine.cpp

@@ -2699,8 +2699,8 @@ JSValue* Machine::retrieveArguments(ExecState* exec, JSFunction* function) const
 
     JSActivation* activation = static_cast<JSActivation*>(callFrame[RegisterFile::OptionalCalleeActivation].u.jsValue);
     if (!activation) {
-        CodeBlock* codeBlock = &function->body->generatedCode();
-        activation = new (exec) JSActivation(function->body, callFrame + RegisterFile::CallFrameHeaderSize + codeBlock->numLocals);
+        CodeBlock* codeBlock = &function->m_body->generatedCode();
+        activation = new (exec) JSActivation(function->m_body, callFrame + RegisterFile::CallFrameHeaderSize + codeBlock->numLocals);
         callFrame[RegisterFile::OptionalCalleeActivation].u.jsValue = activation;
     }
 

JavaScriptCore/kjs/Arguments.cpp

@@ -35,62 +35,62 @@ namespace KJS {
 const ClassInfo Arguments::info = { "Arguments", 0, 0, 0 };
 
 // ECMA 10.1.8
-Arguments::Arguments(ExecState* exec, JSFunction* func, const ArgList& args, JSActivation* act)
+Arguments::Arguments(ExecState* exec, JSFunction* function, const ArgList& args, JSActivation* activation)
     : JSObject(exec->lexicalGlobalObject()->objectPrototype())
-    , _activationObject(act)
-    , indexToNameMap(func, args)
+    , m_activationObject(activation)
+    , m_indexToNameMap(function, args)
 {
-    putDirect(exec->propertyNames().callee, func, DontEnum);
+    putDirect(exec->propertyNames().callee, function, DontEnum);
     putDirect(exec, exec->propertyNames().length, args.size(), DontEnum);
   
     int i = 0;
     ArgList::const_iterator end = args.end();
     for (ArgList::const_iterator it = args.begin(); it != end; ++it, ++i) {
         Identifier name = Identifier::from(exec, i);
-        if (!indexToNameMap.isMapped(name))
+        if (!m_indexToNameMap.isMapped(name))
             putDirect(name, *it, DontEnum);
     }
 }
 
 void Arguments::mark() 
 {
-  JSObject::mark();
-  if (_activationObject && !_activationObject->marked())
-    _activationObject->mark();
+    JSObject::mark();
+    if (m_activationObject && !m_activationObject->marked())
+        m_activationObject->mark();
 }
 
 JSValue* Arguments::mappedIndexGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot& slot)
 {
-  Arguments* thisObj = static_cast<Arguments*>(slot.slotBase());
-  return thisObj->_activationObject->get(exec, thisObj->indexToNameMap[propertyName]);
+      Arguments* thisObj = static_cast<Arguments*>(slot.slotBase());
+      return thisObj->m_activationObject->get(exec, thisObj->m_indexToNameMap[propertyName]);
 }
 
 bool Arguments::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
 {
-  if (indexToNameMap.isMapped(propertyName)) {
-    slot.setCustom(this, mappedIndexGetter);
-    return true;
-  }
+    if (m_indexToNameMap.isMapped(propertyName)) {
+        slot.setCustom(this, mappedIndexGetter);
+        return true;
+    }
 
-  return JSObject::getOwnPropertySlot(exec, propertyName, slot);
+    return JSObject::getOwnPropertySlot(exec, propertyName, slot);
 }
 
 void Arguments::put(ExecState* exec, const Identifier& propertyName, JSValue* value)
 {
-    if (indexToNameMap.isMapped(propertyName))
-        _activationObject->put(exec, indexToNameMap[propertyName], value);
+    if (m_indexToNameMap.isMapped(propertyName))
+        m_activationObject->put(exec, m_indexToNameMap[propertyName], value);
     else
         JSObject::put(exec, propertyName, value);
 }
 
 bool Arguments::deleteProperty(ExecState* exec, const Identifier& propertyName) 
 {
-  if (indexToNameMap.isMapped(propertyName)) {
-    indexToNameMap.unMap(exec, propertyName);
-    return true;
-  } else {
+    if (m_indexToNameMap.isMapped(propertyName)) {
+        m_indexToNameMap.unMap(exec, propertyName);
+        return true;
+    }
+
     return JSObject::deleteProperty(exec, propertyName);
-  }
 }
 
 } // namespace KJS

JavaScriptCore/kjs/Arguments.h

@@ -29,23 +29,27 @@
 
 namespace KJS {
 
-  class JSActivation;
-
-  class Arguments : public JSObject {
-  public:
-    Arguments(ExecState*, JSFunction* func, const ArgList& args, JSActivation* act);
-    virtual void mark();
-    virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
-    virtual void put(ExecState*, const Identifier& propertyName, JSValue*);
-    virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
-    virtual const ClassInfo* classInfo() const { return &info; }
-    static const ClassInfo info;
-  private:
-    static JSValue* mappedIndexGetter(ExecState*, const Identifier&, const PropertySlot& slot);
-
-    JSActivation* _activationObject;
-    mutable IndexToNameMap indexToNameMap;
-  };
+    class JSActivation;
+
+    class Arguments : public JSObject {
+    public:
+        Arguments(ExecState*, JSFunction*, const ArgList&, JSActivation*);
+
+        virtual void mark();
+
+        virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
+        virtual void put(ExecState*, const Identifier& propertyName, JSValue*);
+        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
+
+        virtual const ClassInfo* classInfo() const { return &info; }
+        static const ClassInfo info;
+
+    private:
+        static JSValue* mappedIndexGetter(ExecState*, const Identifier&, const PropertySlot& slot);
+
+        JSActivation* m_activationObject;
+        mutable IndexToNameMap m_indexToNameMap;
+    };
 
 } // namespace KJS
 

JavaScriptCore/kjs/ArrayConstructor.cpp

@@ -31,11 +31,11 @@
 
 namespace KJS {
 
-ArrayConstructor::ArrayConstructor(ExecState* exec, FunctionPrototype* funcProto, ArrayPrototype* arrayProto)
-    : InternalFunction(funcProto, Identifier(exec, arrayProto->classInfo()->className))
+ArrayConstructor::ArrayConstructor(ExecState* exec, FunctionPrototype* functionPrototype, ArrayPrototype* arrayPrototype)
+    : InternalFunction(functionPrototype, Identifier(exec, arrayPrototype->classInfo()->className))
 {
     // ECMA 15.4.3.1 Array.prototype
-    putDirect(exec->propertyNames().prototype, arrayProto, DontEnum|DontDelete|ReadOnly);
+    putDirect(exec->propertyNames().prototype, arrayPrototype, DontEnum | DontDelete | ReadOnly);
 
     // no. of arguments for constructor
     putDirect(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
@@ -80,4 +80,4 @@ CallType ArrayConstructor::getCallData(CallData& callData)
     return CallTypeNative;
 }
 
-}
+} // namespace KJS

JavaScriptCore/kjs/ArrayConstructor.h

@@ -25,15 +25,16 @@
 
 namespace KJS {
 
-  class ArrayPrototype;
-  class FunctionPrototype;
-
-  class ArrayConstructor : public InternalFunction {
-  public:
-    ArrayConstructor(ExecState*, FunctionPrototype*, ArrayPrototype*);
-    virtual ConstructType getConstructData(ConstructData&);
-    virtual CallType getCallData(CallData&);
-  };
+    class ArrayPrototype;
+    class FunctionPrototype;
+
+    class ArrayConstructor : public InternalFunction {
+    public:
+        ArrayConstructor(ExecState*, FunctionPrototype*, ArrayPrototype*);
+
+        virtual ConstructType getConstructData(ConstructData&);
+        virtual CallType getCallData(CallData&);
+    };
 
 } // namespace KJS
 

JavaScriptCore/kjs/ArrayPrototype.cpp

@@ -28,9 +28,9 @@
 #include "ObjectPrototype.h"
 #include "lookup.h"
 #include "operations.h"
+#include <algorithm>
 #include <wtf/Assertions.h>
 #include <wtf/HashSet.h>
-#include <algorithm> // for std::min
 
 namespace KJS {
 
@@ -89,8 +89,8 @@ const ClassInfo ArrayPrototype::info = {"Array", &JSArray::info, 0, ExecState::a
 */
 
 // ECMA 15.4.4
-ArrayPrototype::ArrayPrototype(ExecState*, ObjectPrototype* objProto)
-    : JSArray(objProto, 0)
+ArrayPrototype::ArrayPrototype(ExecState*, ObjectPrototype* objectPrototype)
+    : JSArray(objectPrototype, 0)
 {
 }
 
@@ -774,4 +774,4 @@ JSValue* arrayProtoFuncLastIndexOf(ExecState* exec, JSObject*, JSValue* thisValu
     return jsNumber(exec, -1);
 }
 
-}
+} // namespace KJS

JavaScriptCore/kjs/ArrayPrototype.h

@@ -26,14 +26,15 @@
 
 namespace KJS {
 
- class ArrayPrototype : public JSArray {
-  public:
-    ArrayPrototype(ExecState*, ObjectPrototype*);
-
-    bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
-    virtual const ClassInfo* classInfo() const { return &info; }
-    static const ClassInfo info;
-  };
+    class ArrayPrototype : public JSArray {
+    public:
+        ArrayPrototype(ExecState*, ObjectPrototype*);
+
+        bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
+
+        virtual const ClassInfo* classInfo() const { return &info; }
+        static const ClassInfo info;
+    };
 
 } // namespace KJS
 

JavaScriptCore/kjs/BooleanConstructor.h

@@ -28,14 +28,10 @@ namespace KJS {
     class BooleanPrototype;
     class FunctionPrototype;
 
-    /**
-     * @internal
-     *
-     * The initial value of the the global variable's "Boolean" property
-     */
     class BooleanConstructor : public InternalFunction {
     public:
         BooleanConstructor(ExecState*, FunctionPrototype*, BooleanPrototype*);
+
     private:
         virtual ConstructType getConstructData(ConstructData&);
         virtual CallType getCallData(CallData&);

JavaScriptCore/kjs/BooleanObject.cpp

@@ -25,8 +25,8 @@ namespace KJS {
 
 const ClassInfo BooleanObject::info = { "Boolean", 0, 0, 0 };
 
-BooleanObject::BooleanObject(JSObject* proto)
-    : JSWrapperObject(proto)
+BooleanObject::BooleanObject(JSObject* prototype)
+    : JSWrapperObject(prototype)
 {
 }
 

JavaScriptCore/kjs/BooleanObject.h

@@ -27,7 +27,7 @@ namespace KJS {
 
     class BooleanObject : public JSWrapperObject {
     public:
-        BooleanObject(JSObject* proto);
+        BooleanObject(JSObject* prototype);
 
         virtual const ClassInfo* classInfo() const { return &info; }
         static const ClassInfo info;

JavaScriptCore/kjs/BooleanPrototype.h

@@ -28,12 +28,6 @@ namespace KJS {
     class FunctionPrototype;
     class ObjectPrototype;
 
-    /**
-     * @internal
-     *
-     * The initial value of Boolean.prototype (and thus all objects created
-     * with the Boolean constructor
-     */
     class BooleanPrototype : public BooleanObject {
     public:
         BooleanPrototype(ExecState*, ObjectPrototype*, FunctionPrototype*);

JavaScriptCore/kjs/ClassInfo.h

@@ -27,37 +27,35 @@
 
 namespace KJS {
 
-  struct HashEntry;
-  struct HashTable;
-
-  /**
-   * Class Information
-   */
-  struct ClassInfo {
-    /**
-     * A string denoting the class name. Example: "Window".
-     */
-    const char* className;
-    /**
-     * Pointer to the class information of the base class.
-     * 0L if there is none.
-     */
-    const ClassInfo* parentClass;
-    /**
-     * Static hash-table of properties.
-     * For classes that can be used from multiple threads, it is accessed via a getter function that would typically return a pointer to thread-specific value.
-     */
-    const HashTable* propHashTable(ExecState* exec) const
-    {
-        if (classPropHashTableGetterFunction)
-            return classPropHashTableGetterFunction(exec);
-        return staticPropHashTable;
-    }
-
-    const HashTable* staticPropHashTable;
-    typedef const HashTable* (*ClassPropHashTableGetterFunction)(ExecState*);
-    const ClassPropHashTableGetterFunction classPropHashTableGetterFunction;
-  };
+    struct HashEntry;
+    struct HashTable;
+
+    struct ClassInfo {
+        /**
+         * A string denoting the class name. Example: "Window".
+         */
+        const char* className;
+
+        /**
+         * Pointer to the class information of the base class.
+         * 0L if there is none.
+         */
+        const ClassInfo* parentClass;
+        /**
+         * Static hash-table of properties.
+         * For classes that can be used from multiple threads, it is accessed via a getter function that would typically return a pointer to thread-specific value.
+         */
+        const HashTable* propHashTable(ExecState* exec) const
+        {
+            if (classPropHashTableGetterFunction)
+                return classPropHashTableGetterFunction(exec);
+            return staticPropHashTable;
+        }
+
+        const HashTable* staticPropHashTable;
+        typedef const HashTable* (*ClassPropHashTableGetterFunction)(ExecState*);
+        const ClassPropHashTableGetterFunction classPropHashTableGetterFunction;
+    };
 
 } // namespace KJS
 

JavaScriptCore/kjs/CollectorHeapIntrospector.h

@@ -29,47 +29,48 @@
 #ifndef CollectorHeapIntrospector_h
 #define CollectorHeapIntrospector_h
 
-#include <malloc/malloc.h>
 #include "Assertions.h"
+#include <malloc/malloc.h>
 
 namespace KJS {
 
-struct CollectorHeap;
-    
-class CollectorHeapIntrospector {
-public:
-    static void init(CollectorHeap*, CollectorHeap*);
-    static kern_return_t enumerate(task_t, void* context, unsigned typeMask, vm_address_t zoneAddress, memory_reader_t, vm_range_recorder_t);
-    static size_t goodSize(malloc_zone_t*, size_t size) { return size; }
-    static boolean_t check(malloc_zone_t*) { return true; }
-    static void  print(malloc_zone_t*, boolean_t) { }
-    static void log(malloc_zone_t*, void*) { }
-    static void forceLock(malloc_zone_t*) { }
-    static void forceUnlock(malloc_zone_t*) { }
-    static void statistics(malloc_zone_t*, malloc_statistics_t*);
+    struct CollectorHeap;
+        
+    class CollectorHeapIntrospector {
+    public:
+        static void init(CollectorHeap*, CollectorHeap*);
+        static kern_return_t enumerate(task_t, void* context, unsigned typeMask, vm_address_t zoneAddress, memory_reader_t, vm_range_recorder_t);
+        static size_t goodSize(malloc_zone_t*, size_t size) { return size; }
+        static boolean_t check(malloc_zone_t*) { return true; }
+        static void  print(malloc_zone_t*, boolean_t) { }
+        static void log(malloc_zone_t*, void*) { }
+        static void forceLock(malloc_zone_t*) { }
+        static void forceUnlock(malloc_zone_t*) { }
+        static void statistics(malloc_zone_t*, malloc_statistics_t*);
+
+    private:
+        CollectorHeapIntrospector(CollectorHeap*, CollectorHeap*);
 
-private:
-    CollectorHeapIntrospector(CollectorHeap*, CollectorHeap*);
-    static size_t size(malloc_zone_t*, const void*) { return 0; }
-    static void* zoneMalloc(malloc_zone_t*, size_t) { LOG_ERROR("malloc is not supported"); return 0; }
-    static void* zoneCalloc(malloc_zone_t*, size_t, size_t) { LOG_ERROR("calloc is not supported"); return 0; }
-    static void* zoneRealloc(malloc_zone_t*, void*, size_t) { LOG_ERROR("realloc is not supported"); return 0; }
-    static void* zoneValloc(malloc_zone_t*, size_t) { LOG_ERROR("valloc is not supported"); return 0; }
-    static void zoneDestroy(malloc_zone_t*) { }
+        static size_t size(malloc_zone_t*, const void*) { return 0; }
+        static void* zoneMalloc(malloc_zone_t*, size_t) { LOG_ERROR("malloc is not supported"); return 0; }
+        static void* zoneCalloc(malloc_zone_t*, size_t, size_t) { LOG_ERROR("calloc is not supported"); return 0; }
+        static void* zoneRealloc(malloc_zone_t*, void*, size_t) { LOG_ERROR("realloc is not supported"); return 0; }
+        static void* zoneValloc(malloc_zone_t*, size_t) { LOG_ERROR("valloc is not supported"); return 0; }
+        static void zoneDestroy(malloc_zone_t*) { }
 
-    static void zoneFree(malloc_zone_t*, void* ptr)
-    {
-        // Due to <rdar://problem/5671357> zoneFree may be called by the system free even if the pointer
-        // is not in this zone.  When this happens, the pointer being freed was not allocated by any
-        // zone so we need to print a useful error for the application developer.
-        malloc_printf("*** error for object %p: pointer being freed was not allocated\n", ptr);
-    }
+        static void zoneFree(malloc_zone_t*, void* ptr)
+        {
+            // Due to <rdar://problem/5671357> zoneFree may be called by the system free even if the pointer
+            // is not in this zone.  When this happens, the pointer being freed was not allocated by any
+            // zone so we need to print a useful error for the application developer.
+            malloc_printf("*** error for object %p: pointer being freed was not allocated\n", ptr);
+        }
 
-    malloc_zone_t m_zone;
-    CollectorHeap* m_primaryHeap;
-    CollectorHeap* m_numberHeap;
-};
+        malloc_zone_t m_zone;
+        CollectorHeap* m_primaryHeap;
+        CollectorHeap* m_numberHeap;
+    };
 
-}
+} // namespace KJS
 
 #endif // CollectorHeapIntrospector_h

JavaScriptCore/kjs/CommonIdentifiers.h

@@ -18,8 +18,8 @@
  *
  */
 
-#ifndef KJS_COMMON_IDENTIFIERS_H
-#define KJS_COMMON_IDENTIFIERS_H
+#ifndef CommonIdentifiers_h
+#define CommonIdentifiers_h
 
 #include "identifier.h"
 #include <wtf/Noncopyable.h>
@@ -81,7 +81,7 @@ namespace KJS {
         KJS_COMMON_IDENTIFIERS_EACH_PROPERTY_NAME(KJS_IDENTIFIER_DECLARE_PROPERTY_NAME_GLOBAL)
 #undef KJS_IDENTIFIER_DECLARE_PROPERTY_NAME_GLOBAL
     };
-} // namespace KJS
 
-#endif // KJS_COMMON_IDENTIFIERS_H
+} // namespace KJS
 
+#endif // CommonIdentifiers_h

JavaScriptCore/kjs/DateConstructor.cpp

@@ -49,62 +49,64 @@ static JSValue* dateParse(ExecState*, JSObject*, JSValue*, const ArgList&);
 static JSValue* dateNow(ExecState*, JSObject*, JSValue*, const ArgList&);
 static JSValue* dateUTC(ExecState*, JSObject*, JSValue*, const ArgList&);
 
-DateConstructor::DateConstructor(ExecState* exec, FunctionPrototype* funcProto, DatePrototype* dateProto)
-  : InternalFunction(funcProto, Identifier(exec, dateProto->classInfo()->className))
+DateConstructor::DateConstructor(ExecState* exec, FunctionPrototype* functionPrototype, DatePrototype* datePrototype)
+    : InternalFunction(functionPrototype, Identifier(exec, datePrototype->classInfo()->className))
 {
-  putDirect(exec->propertyNames().prototype, dateProto, DontEnum|DontDelete|ReadOnly);
-  putDirectFunction(new (exec) PrototypeFunction(exec, funcProto, 1, exec->propertyNames().parse, dateParse), DontEnum);
-  putDirectFunction(new (exec) PrototypeFunction(exec, funcProto, 7, exec->propertyNames().UTC, dateUTC), DontEnum);
-  putDirectFunction(new (exec) PrototypeFunction(exec, funcProto, 0, exec->propertyNames().now, dateNow), DontEnum);
-  putDirect(exec, exec->propertyNames().length, 7, ReadOnly | DontEnum | DontDelete);
+      putDirect(exec->propertyNames().prototype, datePrototype, DontEnum|DontDelete|ReadOnly);
+
+      putDirectFunction(new (exec) PrototypeFunction(exec, functionPrototype, 1, exec->propertyNames().parse, dateParse), DontEnum);
+      putDirectFunction(new (exec) PrototypeFunction(exec, functionPrototype, 7, exec->propertyNames().UTC, dateUTC), DontEnum);
+      putDirectFunction(new (exec) PrototypeFunction(exec, functionPrototype, 0, exec->propertyNames().now, dateNow), DontEnum);
+
+      putDirect(exec, exec->propertyNames().length, 7, ReadOnly | DontEnum | DontDelete);
 }
 
 // ECMA 15.9.3
 static JSObject* constructDate(ExecState* exec, JSObject*, const ArgList& args)
 {
-  int numArgs = args.size();
-
-  double value;
-
-  if (numArgs == 0) { // new Date() ECMA 15.9.3.3
-    value = getCurrentUTCTime();
-  } else if (numArgs == 1) {
-    if (args[0]->isObject(&DateInstance::info))
-      value = static_cast<DateInstance*>(args[0])->internalNumber();
-    else {
-      JSValue* primitive = args[0]->toPrimitive(exec);
-      if (primitive->isString())
-        value = parseDate(primitive->getString());
-      else
-        value = primitive->toNumber(exec);
-    }
-  } else {
-    if (isnan(args[0]->toNumber(exec))
-        || isnan(args[1]->toNumber(exec))
-        || (numArgs >= 3 && isnan(args[2]->toNumber(exec)))
-        || (numArgs >= 4 && isnan(args[3]->toNumber(exec)))
-        || (numArgs >= 5 && isnan(args[4]->toNumber(exec)))
-        || (numArgs >= 6 && isnan(args[5]->toNumber(exec)))
-        || (numArgs >= 7 && isnan(args[6]->toNumber(exec)))) {
-      value = NaN;
+    int numArgs = args.size();
+
+    double value;
+
+    if (numArgs == 0) // new Date() ECMA 15.9.3.3
+        value = getCurrentUTCTime();
+    else if (numArgs == 1) {
+        if (args[0]->isObject(&DateInstance::info))
+            value = static_cast<DateInstance*>(args[0])->internalNumber();
+        else {
+            JSValue* primitive = args[0]->toPrimitive(exec);
+            if (primitive->isString())
+                value = parseDate(primitive->getString());
+            else
+                value = primitive->toNumber(exec);
+        }
     } else {
-      GregorianDateTime t;
-      int year = args[0]->toInt32(exec);
-      t.year = (year >= 0 && year <= 99) ? year : year - 1900;
-      t.month = args[1]->toInt32(exec);
-      t.monthDay = (numArgs >= 3) ? args[2]->toInt32(exec) : 1;
-      t.hour = args[3]->toInt32(exec);
-      t.minute = args[4]->toInt32(exec);
-      t.second = args[5]->toInt32(exec);
-      t.isDST = -1;
-      double ms = (numArgs >= 7) ? args[6]->toNumber(exec) : 0;
-      value = gregorianDateTimeToMS(t, ms, false);
+        if (isnan(args[0]->toNumber(exec))
+                || isnan(args[1]->toNumber(exec))
+                || (numArgs >= 3 && isnan(args[2]->toNumber(exec)))
+                || (numArgs >= 4 && isnan(args[3]->toNumber(exec)))
+                || (numArgs >= 5 && isnan(args[4]->toNumber(exec)))
+                || (numArgs >= 6 && isnan(args[5]->toNumber(exec)))
+                || (numArgs >= 7 && isnan(args[6]->toNumber(exec))))
+            value = NaN;
+        else {
+          GregorianDateTime t;
+          int year = args[0]->toInt32(exec);
+          t.year = (year >= 0 && year <= 99) ? year : year - 1900;
+          t.month = args[1]->toInt32(exec);
+          t.monthDay = (numArgs >= 3) ? args[2]->toInt32(exec) : 1;
+          t.hour = args[3]->toInt32(exec);
+          t.minute = args[4]->toInt32(exec);
+          t.second = args[5]->toInt32(exec);
+          t.isDST = -1;
+          double ms = (numArgs >= 7) ? args[6]->toNumber(exec) : 0;
+          value = gregorianDateTimeToMS(t, ms, false);
+        }
     }
-  }
-  
-  DateInstance* ret = new (exec) DateInstance(exec->lexicalGlobalObject()->datePrototype());
-  ret->setInternalValue(jsNumber(exec, timeClip(value)));
-  return ret;