- Specialized IsClassOf for Number, Boolean, Arguments, and Function.

src/runtime.cc

 // 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
@@ skipping 203 matching lines @@
 
 
 static Object* Runtime_ClassOf(Arguments args) {
   NoHandleAllocation ha;
   ASSERT(args.length() == 1);
   Object* obj = args[0];
   if (!obj->IsJSObject()) return Heap::null_value();
   return JSObject::cast(obj)->class_name();
 }
 
 inline static Object* IsSpecificClassOf(Arguments args, String* name) {

[Mads Ager (chromium), 2008/10/17 11:19:11]

HasSpecificClass?

   NoHandleAllocation ha;
   ASSERT(args.length() == 1);
   Object* obj = args[0];
   if (obj->IsJSObject() && (JSObject::cast(obj)->class_name() == name)) {
     return Heap::true_value();
   }
   return Heap::false_value();
 }
 
 static Object* Runtime_IsStringClass(Arguments args) {
   return IsSpecificClassOf(args, Heap::String_symbol());
 }
 
 
 static Object* Runtime_IsDateClass(Arguments args) {
   return IsSpecificClassOf(args, Heap::Date_symbol());
 }
 
 
 static Object* Runtime_IsArrayClass(Arguments args) {
   return IsSpecificClassOf(args, Heap::Array_symbol());
 }
 
 
+static Object* Runtime_IsFunctionClass(Arguments args) {
+  return IsSpecificClassOf(args, Heap::function_class_symbol());
+}
+
+
+static Object* Runtime_IsNumberClass(Arguments args) {
+  return IsSpecificClassOf(args, Heap::Number_symbol());
+}
+
+
+static Object* Runtime_IsBooleanClass(Arguments args) {
+  return IsSpecificClassOf(args, Heap::Boolean_symbol());
+}
+
+
+static Object* Runtime_IsArgumentsClass(Arguments args) {
+  return IsSpecificClassOf(args, Heap::Arguments_symbol());
+}
+
+
 static Object* Runtime_IsInPrototypeChain(Arguments args) {
   NoHandleAllocation ha;
   ASSERT(args.length() == 2);
   // See ECMA-262, section 15.3.5.3, page 88 (steps 5 - 8).
   Object* O = args[0];
   Object* V = args[1];
   while (true) {
     Object* prototype = V->GetPrototype();
     if (prototype->IsNull()) return Heap::false_value();
     if (O == prototype) return Heap::true_value();
@@ skipping 5144 matching lines @@
 
 void Runtime::PerformGC(Object* result) {
   Failure* failure = Failure::cast(result);
   // Try to do a garbage collection; ignore it if it fails. The C
   // entry stub will throw an out-of-memory exception in that case.
   Heap::CollectGarbage(failure->requested(), failure->allocation_space());
 }
 
 
 } }  // namespace v8::internal