Added Object.defineProperty + needed internal functionality:...

src/runtime.js

 // 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 488 matching lines @@
   // Fast case check.
   if (IS_STRING(x)) return x;
   // Normal behavior.
   if (!IS_OBJECT(x) && !IS_FUNCTION(x)) return x;
   if (x == null) return x;  // check for null, undefined
   if (hint == NO_HINT) hint = (IS_DATE(x)) ? STRING_HINT : NUMBER_HINT;
   return (hint == NUMBER_HINT) ? %DefaultNumber(x) : %DefaultString(x);
 }
 
 
+// ECMA-262, section 9.2, page 30
+function ToBoolean(x) {
+  if (IS_BOOLEAN(x)) return x;
+  if (IS_STRING(x)) return x.length != 0;
+  if (x == null) return false;
+  if (IS_NUMBER(x)) return !((x == 0) || NUMBER_IS_NAN(x));
+  return true;
+}
+
+
 // ECMA-262, section 9.3, page 31.
 function ToNumber(x) {
   if (IS_NUMBER(x)) return x;
   if (IS_STRING(x)) return %StringToNumber(x);
   if (IS_BOOLEAN(x)) return x ? 1 : 0;
   if (IS_UNDEFINED(x)) return $NaN;
   return (IS_NULL(x)) ? 0 : ToNumber(%DefaultNumber(x));
 }
 
 
 // ECMA-262, section 9.8, page 35.
 function ToString(x) {
   if (IS_STRING(x)) return x;
   if (IS_NUMBER(x)) return %NumberToString(x);
   if (IS_BOOLEAN(x)) return x ? 'true' : 'false';
   if (IS_UNDEFINED(x)) return 'undefined';
   return (IS_NULL(x)) ? 'null' : %ToString(%DefaultString(x));
 }
 
 
-// ... where did this come from?
-function ToBoolean(x) {
-  if (IS_BOOLEAN(x)) return x;
-  if (IS_STRING(x)) return x.length != 0;
-  if (x == null) return false;
-  if (IS_NUMBER(x)) return !((x == 0) || NUMBER_IS_NAN(x));
-  return true;
-}
-
-
 // ECMA-262, section 9.9, page 36.
 function ToObject(x) {
   if (IS_STRING(x)) return new $String(x);
   if (IS_NUMBER(x)) return new $Number(x);
   if (IS_BOOLEAN(x)) return new $Boolean(x);
   if (IS_NULL_OR_UNDEFINED(x) && !IS_UNDETECTABLE(x)) {
     throw %MakeTypeError('null_to_object', []);
   }
   return x;
 }
@@ skipping 13 matching lines @@
 }
 
 
 // ECMA-262, section 9.5, page 34
 function ToInt32(x) {
   if (%_IsSmi(x)) return x;
   return %NumberToJSInt32(ToNumber(x));
 }
 
 
+// ES5, section 9.12
+function SameValue(x, y) {
+  if (typeof x != typeof y) return false;
+  if (IS_NULL_OR_UNDEFINED(x)) return true;
+  if (IS_NUMBER(x)) {
+    if (NUMBER_IS_NAN(x) && NUMBER_IS_NAN(y)) return true;
+    // x is +0 and y is -0 or vice versa
+    if (x === 0 && y === 0 && !%_IsSmi(x) && !%_IsSmi(y) && 
+        ((1 / x < 0 && 1 / y > 0) || (1 / x > 0 && 1 / y < 0))) {
+      return false;
+    }
+    return x == y;    
+  }
+  if (IS_STRING(x)) return %StringEquals(x, y);
+  if (IS_BOOLEAN(x))return %NumberEquals(%ToNumber(x),%ToNumber(y));
+
+  return %_ObjectEquals(x, y);
+}
+
 
 /* ---------------------------------
    - - -   U t i l i t i e s   - - -
    ---------------------------------
 */
 
 // Returns if the given x is a primitive value - not an object or a
 // function.
 function IsPrimitive(x) {
   if (!IS_OBJECT(x) && !IS_FUNCTION(x)) {
@@ skipping 37 matching lines @@
   throw %MakeTypeError('cannot_convert_to_primitive', []);
 }
 
 
 // NOTE: Setting the prototype for Array must take place as early as
 // possible due to code generation for array literals.  When
 // generating code for a array literal a boilerplate array is created
 // that is cloned when running the code.  It is essiential that the
 // boilerplate gets the right prototype.
 %FunctionSetPrototype($Array, new $Array(0));