Introduce v8::Integer::NewFromUnsigned method.

include/v8.h

 // Copyright 2007-2009 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 1045 matching lines @@
   static void CheckCast(v8::Value* obj);
 };
 
 
 /**
  * A JavaScript value representing a signed integer.
  */
 class V8EXPORT Integer : public Number {
  public:
   static Local<Integer> New(int32_t value);
+  static inline Local<Integer> NewFromUnsigned(uint32_t value);
   int64_t Value() const;
   static inline Integer* Cast(v8::Value* obj);
  private:
   Integer();
   static void CheckCast(v8::Value* obj);
 };
 
 
 /**
  * A JavaScript value representing a 32-bit signed integer.
@@ skipping 1942 matching lines @@
 
 
 Number* Number::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);
 #endif
   return static_cast<Number*>(value);
 }
 
 
+Local<Integer> Integer::NewFromUnsigned(uint32_t value) {
+  // If highest bit is not set, chances are it's SMI.
+  bool fits_into_int32_t = (value & (1 << 31)) == 0;
+  if (fits_into_int32_t) {
+    return Integer::New(static_cast<int32_t>(value));
+  }
+  return Local<Integer>::Cast(Number::New(value));
+}
+
+
 Integer* Integer::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);
 #endif
   return static_cast<Integer*>(value);
 }
 
 
 Date* Date::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
@@ skipping 64 matching lines @@
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef V8EXPORT_INLINE
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_