Native implementation of List,setRange for frog.

frog/lib/corelib_impl.dart

 // Copyright (c) 2011, 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.
 
 #library("dart:coreimpl");
 
 #source("../../corelib/src/implementation/dual_pivot_quicksort.dart");
 #source("../../corelib/src/implementation/duration_implementation.dart");
 #source("../../corelib/src/implementation/exceptions.dart");
 #source("../../corelib/src/implementation/future_implementation.dart");
@@ skipping 54 matching lines @@
   int lastIndexOf(E element, [int start]) native;
   void clear() { length = 0; }
 
   E removeLast() native "return this.pop();";
 
   E last() => this[this.length-1];
 
   List<E> getRange(int start, int length) native
     "return this.slice(start, start + length);";
 
-  void setRange(int start, int length, List<E> from, [int startFrom]) native;
+  void setRange(int start, int length, List<E> from, [int startFrom]) native
+    """
+    startFrom = (startFrom === null ? 0 : startFrom);

[jimhug, 2012/01/04 17:38:17]

startFrom == null will do the correct comparison on the JS side to handle either
null or undefined - which is something that the dart compiler will occasionally
rely on.

[dominich, 2012/01/05 18:19:57]

Done.

+    for (var i = 0; i < length; ++i)
+      this[start + i] = from[startFrom + i];
+    """;
   void removeRange(int start, int length) native "this.splice(start, length);";
 
   void insertRange(int start, int length, [E initialValue]) native
     """
     // Splice in the values with a minimum of array allocations.
     var args = new Array(length + 2);
     args[0] = start;
     args[1] = 0;
     for (var i = 0; i < length; i++) {
       args[i + 2] = initialValue;
@@ skipping 361 matching lines @@
     } else if (isNaN()) {
       if (other.isNaN()) {
         return 0;
       }
       return 1;
     } else {
       return -1;
     }
   }
 }