Refactor List.setRange function.

sdk/lib/io/buffer_list.dart

 // 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.
 
 part of dart.io;
 
 /**
  * Utility class that holds a number of byte buffers and can deliver
  * the bytes either one by one or in chunks.
  */
@@ skipping 76 matching lines @@
           _buffers.removeFirst();
           _index = 0;
         }
         return result;
       } else {
         result = new Uint8List(count);
         int remaining = count;
         while (remaining > 0) {
           int bytesInFirst = _buffers.first.length - _index;
           if (bytesInFirst <= remaining) {
-            result.setRange(count - remaining,
-                            bytesInFirst,
-                            _buffers.first,
-                            _index);
+            int startIndex = count - remaining;
+            int endIndex = startIndex + bytesInFirst;
+            result.setRange(startIndex, endIndex, _buffers.first, _index);
             _buffers.removeFirst();
             _index = 0;
             _length -= bytesInFirst;
             remaining -= bytesInFirst;
           } else {
-            result.setRange(count - remaining,
-                            remaining,
-                            _buffers.first,
-                            _index);
+            result.setRange(count - remaining, count, _buffers.first, _index);
             _index = remaining;
             _length -= remaining;
             remaining = 0;
             assert(_index < _buffers.first.length);
           }
         }
         return result;
       }
     }
   }
@@ skipping 32 matching lines @@
   void clear() {
     _index = 0;
     _length = 0;
     _buffers = new Queue();
   }
 
   int _length;  // Total number of bytes remaining in the buffers.
   Queue<List<int>> _buffers;  // List of data buffers.
   int _index;  // Index of the next byte in the first buffer.
 }