Add support for medium integers to the native message format

runtime/include/dart_api.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
  *
  * Dart is a class-based programming language for creating structured
@@ skipping 530 matching lines @@
  * A Dart_CObject is used for representing Dart objects as native C
  * data outside the Dart heap. These objects are totally detached from
  * the Dart heap. Only a subset of the Dart objects have a
  * representation as a Dart_CObject.
  */
 struct Dart_CObject {
   enum Type {
     kNull = 0,
     kBool,
     kInt32,
+    kInt64,
     kDouble,
     kString,
     kArray,
     kByteArray,
     kNumberOfTypes
   };
   Type type;
   union {
     bool as_bool;
     int32_t as_int32;
+    int64_t as_int64;
     double as_double;
     char* as_string;
     struct {
       int length;
       Dart_CObject** values;
     } as_array;
     struct {
       int length;
       uint8_t* values;
     } as_byte_array;
@@ skipping 21 matching lines @@
  * A native message handler.
  *
  * This handler is associated with a native port by calling
  * Dart_NewNativePort.
  *
  * The message received is decoded into the message structure. The
  * lifetime of the message data is controlled by the caller. All the
  * data references from the message are allocated by the caller and
  * will be reclaimed when returning to it.
  */
+
 typedef void (*Dart_NativeMessageHandler)(Dart_Port dest_port_id,
                                           Dart_Port reply_port_id,
                                           Dart_CObject* message);
 
 /**
  * Creates a new native port.  When messages are received on this
  * native port, then they will be dispatched to the provided native
  * message handler.
  *
  * \param name The name of this port in debugging messages.
@@ skipping 853 matching lines @@
 
 // --- Profiling support ----
 
 // External pprof support for gathering and dumping symbolic
 // information that can be used for better profile reports for
 // dynamically generated code.
 DART_EXPORT void Dart_InitPprofSupport();
 DART_EXPORT void Dart_GetPprofSymbolInfo(void** buffer, int* buffer_size);
 
 #endif  // INCLUDE_DART_API_H_