Fix input and output to handle UTF16 surrogate pairs.

src/handles.h

 // Copyright 2011 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 152 matching lines @@
 
 // ----------------------------------------------------------------------------
 // Handle operations.
 // They might invoke garbage collection. The result is an handle to
 // an object of expected type, or the handle is an error if running out
 // of space or encountering an internal error.
 
 // Flattens a string.
 void FlattenString(Handle<String> str);
 
+

[rossberg, 2012/03/12 10:55:05]

Nit: accidental extra newline?

[Erik Corry, 2012/03/12 12:34:10]

Done.

 // Flattens a string and returns the underlying external or sequential
 // string.
 Handle<String> FlattenGetString(Handle<String> str);
 
+int Utf8Length(Handle<String> str);
+
 Handle<Object> SetProperty(Handle<Object> object,
                            Handle<Object> key,
                            Handle<Object> value,
                            PropertyAttributes attributes,
                            StrictModeFlag strict_mode);
 
 Handle<Object> ForceSetProperty(Handle<JSObject> object,
                                 Handle<Object> key,
                                 Handle<Object> value,
                                 PropertyAttributes attributes);
@@ skipping 104 matching lines @@
   inline NoHandleAllocation();
   inline ~NoHandleAllocation();
  private:
   int level_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HANDLES_H_