- Allow for loading dart:html and friends into the standalone

runtime/bin/builtin_natives.cc

 // 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 <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 
 #include "include/dart_api.h"
 #include "include/dart_tools_api.h"
@@ skipping 26 matching lines @@
 
 static struct NativeEntries {
   const char* name_;
   Dart_NativeFunction function_;
   int argument_count_;
 } BuiltinEntries[] = {
   BUILTIN_NATIVE_LIST(REGISTER_FUNCTION)
 };
 
 
+void Builtin_DummyNative(Dart_NativeArguments args) {
+  UNREACHABLE();
+}
+
+
+
 /**
  * Looks up native functions in both libdart_builtin and libdart_io.
  */
 Dart_NativeFunction Builtin::NativeLookup(Dart_Handle name,
                                           int argument_count,
                                           bool* auto_setup_scope) {
   const char* function_name = NULL;
-  Dart_Handle result = Dart_StringToCString(name, &function_name);
-  DART_CHECK_VALID(result);
+  Dart_Handle err = Dart_StringToCString(name, &function_name);
+  DART_CHECK_VALID(err);
   ASSERT(function_name != NULL);
   ASSERT(auto_setup_scope != NULL);
   *auto_setup_scope = true;
   int num_entries = sizeof(BuiltinEntries) / sizeof(struct NativeEntries);
   for (int i = 0; i < num_entries; i++) {
     struct NativeEntries* entry = &(BuiltinEntries[i]);
     if ((strcmp(function_name, entry->name_) == 0) &&
         (entry->argument_count_ == argument_count)) {
       return reinterpret_cast<Dart_NativeFunction>(entry->function_);
     }
   }
-  return IONativeLookup(name, argument_count, auto_setup_scope);
+  Dart_NativeFunction result =
+      IONativeLookup(name, argument_count, auto_setup_scope);
+  if (result == NULL) {
+    result = Builtin_DummyNative;
+  }
+  return result;
 }
 
 
 const uint8_t* Builtin::NativeSymbol(Dart_NativeFunction nf) {
   int num_entries = sizeof(BuiltinEntries) / sizeof(struct NativeEntries);
   for (int i = 0; i < num_entries; i++) {
     struct NativeEntries* entry = &(BuiltinEntries[i]);
     if (reinterpret_cast<Dart_NativeFunction>(entry->function_) == nf) {
       return reinterpret_cast<const uint8_t*>(entry->name_);
     }
@@ skipping 22 matching lines @@
     // For now we report print output on the Stdout stream.
     uint8_t newline[] = { '\n' };
     Dart_ServiceSendDataEvent("Stdout", "WriteEvent", chars, length);
     Dart_ServiceSendDataEvent("Stdout", "WriteEvent",
                               newline, sizeof(newline));
   }
 }
 
 }  // namespace bin
 }  // namespace dart