|  | // 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. | 
|  |  | 
|  | #include "vm/bootstrap_natives.h" | 
|  |  | 
|  | #include "include/dart_api.h" | 
|  | #include "vm/dart_api_impl.h" | 
|  | #include "vm/dart_entry.h" | 
|  | #include "vm/exceptions.h" | 
|  | #include "vm/isolate.h" | 
|  | #include "vm/native_entry.h" | 
|  | #include "vm/object.h" | 
|  | #include "vm/object_store.h" | 
|  | #include "vm/symbols.h" | 
|  |  | 
|  | namespace dart { | 
|  |  | 
|  | DEFINE_NATIVE_ENTRY(Bool_fromEnvironment, 3) { | 
|  | GET_NON_NULL_NATIVE_ARGUMENT(String, name, arguments->NativeArgAt(1)); | 
|  | GET_NATIVE_ARGUMENT(Bool, default_value, arguments->NativeArgAt(2)); | 
|  | // Call the embedder to supply us with the environment. | 
|  | const String& env_value = | 
|  | String::Handle(Api::GetEnvironmentValue(thread, name)); | 
|  | if (!env_value.IsNull()) { | 
|  | if (Symbols::True().Equals(env_value)) { | 
|  | return Bool::True().raw(); | 
|  | } | 
|  | if (Symbols::False().Equals(env_value)) { | 
|  | return Bool::False().raw(); | 
|  | } | 
|  | } | 
|  | return default_value.raw(); | 
|  | } | 
|  |  | 
|  | }  // namespace dart |