Use ByteArray's native for Socket and File.

runtime/lib/byte_array.dart

Index: runtime/lib/byte_array.dart
===================================================================
--- runtime/lib/byte_array.dart	(revision 3627)
+++ runtime/lib/byte_array.dart	(working copy)
@@ -63,6 +63,31 @@
     return _length();
   }
 

[cshapiro, 2012/01/28 02:25:48]

This code should be moved downward beneath the List interface header.

[Anders Johnsen, 2012/01/30 21:15:28]

Done.

+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (length < 0) {
+      throw new IllegalArgumentException("negative length $length");
+    }
+    if (from is ByteArray) {
+      _setRange(from, startFrom, start, length);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+  
+  List getRange(int start, int length) {
+    if (length == 0) return [];
+    Arrays.rangeCheck(this, start, length);
+    ByteArray list = new ByteArray(length);
+    list._setRange(this, start, 0, length);
+    return list;
+  }
+
+  void _setRange(ByteArray src,

[cshapiro, 2012/01/28 02:25:48]

This should be moved to the very bottom with the other native (implementation)
methods.

[Anders Johnsen, 2012/01/30 21:15:28]

Done.

+                 int srcStart,
+                 int dstStart,
+                 int count)
+      native "ByteArray_setRange";
+
   bool every(bool f(int element)) {
     return Collections.every(this, f);
   }