Implement {Int,Uint}{8,16,32,64} and Float{32,64} typed arrays.

runtime/lib/byte_array.dart

Index: runtime/lib/byte_array.dart
diff --git a/runtime/lib/byte_array.dart b/runtime/lib/byte_array.dart
index 7a807d7aa246406e893ba9b1097b01ff29fa7a36..bcb6b561a794d5209733eb6ea1d019bb6425ec40 100644
--- a/runtime/lib/byte_array.dart
+++ b/runtime/lib/byte_array.dart
@@ -2,10 +2,14 @@
 // 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.
 
-interface ByteArray extends List default _InternalByteArray {
+interface ByteArray default _Uint8Array {
+  // TODO: remove constructor and default implementation after dart:io
+  // is updated to use Uint8Array directly instead of ByteArray
   ByteArray(int length);
 
-  int get length();
+  int lengthInBytes();
+
+  ByteArray subByteArray([int start, int length]);
 
   int getInt8(int byteOffset);
 
@@ -49,509 +53,2230 @@ interface ByteArray extends List default _InternalByteArray {
 }
 
 
-class _ByteArrayBase {
+interface ByteArrayViewable {
+  int bytesPerElement();
 
-  // Iterable interface
+  int lengthInBytes();
 
-  Iterator iterator() {
-    return new _ByteArrayIterator(this);
-  }
+  ByteArray asByteArray([int offsetInBytes, int lengthInBytes]);
+}
 
-  // Collection interface
 
-  int get length() {
-    return _length();
-  }
+interface Int8Array extends List<int>, ByteArrayViewable
+    default _Int8Array {
+  Int8Array(int length);
+  Int8Array.view(ByteArray array, [int start, int length]);
+}
 
-  bool every(bool f(int element)) {
-    return Collections.every(this, f);
-  }
 
-  Collection map(f(int element)) {
-    return Collections.map(this,
-                           new GrowableObjectArray.withCapacity(length), 
-                           f);
-  }
+interface Uint8Array extends List<int>, ByteArrayViewable
+    default _Uint8Array {
+  Uint8Array(int length);
+  Uint8Array.view(ByteArray array, [int start, int length]);
+}
 
-  Collection filter(bool f(int element)) {
-    return Collections.filter(this, new GrowableObjectArray(), f);
-  }
 
-  void forEach(f(int element)) {
-    Collections.forEach(this, f);
-  }
+interface Int16Array extends List<int>, ByteArrayViewable
+    default _Int16Array {
+  Int16Array(int length);
+  Int16Array.view(ByteArray array, [int start, int length]);
+}
 
-  bool isEmpty() {
-    return this.length === 0;
-  }
 
-  bool some(bool f(int element)) {
-    return Collections.some(this, f);
-  }
+interface Uint16Array extends List<int>, ByteArrayViewable
+    default _Uint16Array {
+  Uint16Array(int length);
+  Uint16Array.view(ByteArray array, [int start, int length]);
+}
 
-  // List interface
 
-  int operator[](int index) {
-    return getUint8(index);
-  }
+interface Int32Array extends List<int>, ByteArrayViewable
+    default _Int32Array {
+  Int32Array(int length);
+  Int32Array.view(ByteArray array, [int start, int length]);
+}
 
-  void operator[]=(int index, int value) {
-    setUint8(index, value);
-  }
 
-  void set length(int newLength) {
-    throw const UnsupportedOperationException("Cannot add to a byte array");
-  }
+interface Uint32Array extends List<int>, ByteArrayViewable
+    default _Uint32Array {
+  Uint32Array(int length);
+  Uint32Array.view(ByteArray array, [int start, int length]);
 
-  void add(int element) {
-    throw const UnsupportedOperationException("Cannot add to a byte array");
-  }
+}
 
-  void addLast(int element) {
-    add(element);
-  }
 
-  void addAll(Collection elements) {
-    throw const UnsupportedOperationException("Cannot add to a byte array");
-  }
+interface Int64Array extends List<int>, ByteArrayViewable
+    default _Int64Array {
+  Int64Array(int length);
+  Int64Array.view(ByteArray array, [int start, int length]);
+}
+
+
+interface Uint64Array extends List<int>, ByteArrayViewable
+    default _Uint64Array {
+  Uint64Array(int length);
+  Uint64Array.view(ByteArray array, [int start, int length]);
+}
+
+
+interface Float32Array extends List<double>, ByteArrayViewable
+    default _Float32Array {
+  Float32Array(int length);
+  Float32Array.view(ByteArray array, [int start, int length]);
+}
+
+
+interface Float64Array extends List<double>, ByteArrayViewable
+    default _Float64Array {
+  Float64Array(int length);
+  Float64Array.view(ByteArray array, [int start, int length]);
+}
 
-  void sort(int compare(int a,  b)) {
-    DualPivotQuicksort.sort(this, compare);
+
+abstract class _ByteArrayBase {
+  void add(value) {
+    throw const UnsupportedOperationException(
+        "Cannot add to a non-extendable array");
   }
 
-  int indexOf(int element, [int start = 0]) {
-    return Arrays.indexOf(this, element, start, this.length);
+  void addLast(value) {
+    throw const UnsupportedOperationException(
+        "Cannot add to a non-extendable array");
   }
 
-  int lastIndexOf(int element, [int start = null]) {
-    if (start === null) start = length - 1;
-    return Arrays.lastIndexOf(this, element, start);
+  void addAll(Collection value) {
+    throw const UnsupportedOperationException(
+        "Cannot add to a non-extendable array");
   }
 
   void clear() {
-    throw const UnsupportedOperationException("Cannot clear a byte array");
+    throw const UnsupportedOperationException(
+        "Cannot remove from a non-extendable array");
   }
 
-  int removeLast() {
+  void insertRange(int start, int length, [initialValue]) {
     throw const UnsupportedOperationException(
-      "Cannot remove from a byte array");
+        "Cannot add to a non-extendable array");
   }
 
-  int last() {
-    return this[length - 1];
+  int get length() {
+    return _length();
   }
 
-  String toString() {
-    return Collections.collectionToString(this);
+  set length(newLength) {
+    throw const UnsupportedOperationException(
+        "Cannot resize a non-extendable array");
   }
 
-  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(start, length, from, startFrom);
-    } else {
-      Arrays.copy(from, startFrom, this, start, length);
-    }
+  int removeLast() {
+    throw const UnsupportedOperationException(
+        "Cannot remove from a non-extendable array");
   }
-  
-  List getRange(int start, int length) {
-    if (length == 0) return [];
-    Arrays.rangeCheck(this, start, length);
-    ByteArray list = new ByteArray(length);
-    list._setRange(0, length, this, start);
-    return list;
+
+  void removeRange(int start, int length) {
+    throw const UnsupportedOperationException(
+        "Cannot remove from a non-extendable array");
   }
 
-  // Implementation
+  ByteArray asByteArray([int offsetInBytes = 0, int lengthInBytes]) {
+    if (lengthInBytes === null) {
+      lengthInBytes = this.lengthInBytes();
+    }
+    return new _ByteArrayView(this, offsetInBytes, lengthInBytes);
+  }
 
-  static final int _UINT8_MAX = (1 << 8) - 1;
-  static final int _UINT16_MAX = (1 << 16) - 1;
-  static final int _UINT32_MAX = (1 << 32) - 1;
-  static final int _UINT64_MAX = (1 << 64) - 1;
+  int _length() native "ByteArray_getLength";
 
-  int _toInt(int value, int mask) {
-    int result = value & mask;
-    return result > (mask >> 1) ? (result - mask) : result;
-  }
+  void _setRange(int startInBytes, int lengthInBytes,
+                 _ByteArrayBase from, int startFromInBytes)
+      native "ByteArray_setRange";
 
-  int _toInt8(int value) {
-    return _toInt(value, _UINT8_MAX);
-  }
+  int _getInt8(int byteOffset) native "ByteArray_getInt8";
+  void _setInt8(int byteOffset, int value) native "ByteArray_setInt8";
 
-  int _toUint8(int value) {
-    return value & _UINT8_MAX;
-  }
+  int _getUint8(int byteOffset) native "ByteArray_getUint8";
+  void _setUint8(int byteOffset, int value) native "ByteArray_setUint8";
 
-  int _toInt16(int value) {
-    return _toInt(value, _UINT16_MAX);
-  }
+  int _getInt16(int byteOffset) native "ByteArray_getInt16";
+  void _setInt16(int byteOffset, int value) native "ByteArray_setInt16";
 
-  int _toUint16(int value) {
-    return value & _UINT16_MAX;
-  }
+  int _getUint16(int byteOffset) native "ByteArray_getUint16";
+  void _setUint16(int byteOffset, int value) native "ByteArray_setUint16";
 
-  int _toInt32(int value) {
-    return _toInt(value, _UINT32_MAX);
-  }
+  int _getInt32(int byteOffset) native "ByteArray_getInt32";
+  void _setInt32(int byteOffset, int value) native "ByteArray_setInt32";
 
-  int _toUint32(int value) {
-    return value & _UINT32_MAX;
-  }
+  int _getUint32(int byteOffset) native "ByteArray_getUint32";
+  void _setUint32(int byteOffset, int value) native "ByteArray_setUint32";
 
-  int _toInt64(int value) {
-    return _toInt(value, _UINT64_MAX);
-  }
+  int _getInt64(int byteOffset) native "ByteArray_getInt64";
+  void _setInt64(int byteOffset, int value) native "ByteArray_setInt64";
 
-  int _toUint64(int value) {
-    return value & _UINT64_MAX;
-  }
+  int _getUint64(int byteOffset) native "ByteArray_getUint64";
+  void _setUint64(int byteOffset, int value) native "ByteArray_setUint64";
 
-  int _length() native "ByteArray_getLength";
+  double _getFloat32(int byteOffset) native "ByteArray_getFloat32";
+  void _setFloat32(int byteOffset, double value) native "ByteArray_setFloat32";
 
-  void _setRange(int start, int length, ByteArray from, int startFrom)
-      native "ByteArray_setRange";
+  double _getFloat64(int byteOffset) native "ByteArray_getFloat64";
+  void _setFloat64(int byteOffset, double value) native "ByteArray_setFloat64";
 }
 
 
-class _ByteArrayIterator implements Iterator {
-  _ByteArrayIterator(List byteArray)
-      : _byteArray = byteArray, _length = byteArray.length, _pos = 0 {
-    assert(byteArray is ByteArray);
-  }
+int _toInt(int value, int mask) {
+  value &= mask;
+  if (value > (mask >> 1)) value -= mask + 1;
+  return value;
+}
 
-  bool hasNext() {
-   return _length > _pos;
-  }
+int _toInt8(int value) {
+  return _toInt(value, 0xFF);
+}
+int _toUint8(int value) {
+  return value & 0xFF;
+}
 
-  int next() {
-    if (!hasNext()) {
-      throw const NoMoreElementsException();
-    }
-    return _byteArray[_pos++];
-  }
 
-  final List _byteArray;
+int _toInt16(int value) {
+  return _toInt(value, 0xFFFF);
+}
+int _toUint16(int value) {
+  return value & 0xFFFF;
+}
 
-  final int _length;
 
-  int _pos;
+int _toInt32(int value) {
+  return _toInt(value, 0xFFFFFFFF);
+}
+int _toUint32(int value) {
+  return value & 0xFFFFFFFF;
 }
 
 
-class _InternalByteArray extends _ByteArrayBase implements ByteArray {
-  factory _InternalByteArray(int length) {
-    return _allocate(length);
-  }
+int _toInt64(int value) {
+  return _toInt(value, 0xFFFFFFFFFFFFFFFF);
+}
+int _toUint64(int value) {
+  return value & 0xFFFFFFFFFFFFFFFF;
+}
 
-  // ByteArray interface
 
-  int getInt8(int byteOffset) {
-    return _getInt8(byteOffset);
+class _Int8Array extends _ByteArrayBase implements Int8Array {
+  factory _Int8Array(int length) {
+    return _new(length);
   }
 
-  void setInt8(int byteOffset, int value) {
-    _setInt8(byteOffset, _toInt8(value));
+  factory _Int8Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = array.lengthInBytes();
+    }
+    return new _Int8ArrayView(array, start, length);
   }
 
-  int getUint8(int byteOffset) {
-    return _getUint8(byteOffset);
+  int operator[](int index) {
+    return _getIndexed(index);
   }
 
-  void setUint8(int byteOffset, int value) {
-    _setUint8(byteOffset, _toUint8(value));
+  void operator[]=(int index, int value) {
+    _setIndexed(index, _toInt8(value));
   }
 
-  int getInt16(int byteOffset) {
-    return _getInt16(byteOffset);
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
   }
 
-  void setInt16(int byteOffset, int value) {
-    _setInt16(byteOffset, _toInt16(value));
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Int8Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
   }
 
-  int getUint16(int byteOffset) {
-    return _getInt16(byteOffset);
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Int8Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
   }
 
-  void setUint16(int byteOffset, int value) {
-    _setUint16(byteOffset, _toUint16(value));
+  String toString() {
+    return Collections.collectionToString(this);
   }
 
-  int getInt32(int byteOffset) {
-    return _getInt32(byteOffset);
+  int bytesPerElement() {
+    return 1;
   }
 
-  void setInt32(int byteOffset, int value) {
-    _setInt32(byteOffset, _toInt32(value));
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
   }
 
-  int getUint32(int byteOffset) {
-    return _getUint32(byteOffset);
+  static _Int8Array _new(int length) native "Int8Array_new";
+
+  int _getIndexed(int index) native "Int8Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "Int8Array_setIndexed";
+}
+
+
+class _Uint8Array extends _ByteArrayBase implements Uint8Array {
+  factory _Uint8Array(int length) {
+    return _new(length);
   }
 
-  void setUint32(int byteOffset, int value) {
-    _setUint32(byteOffset, _toUint32(value));
+  factory _Uint8Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = array.lengthInBytes();
+    }
+    return new _Uint8ArrayView(array, start, length);
   }
 
-  int getInt64(int byteOffset) {
-    return _getInt64(byteOffset);
+  factory ByteArray(int length) { return _new(length); }  // TODO
+
+  int operator[](int index) {
+    return _getIndexed(index);
   }
 
-  void setInt64(int byteOffset, int value) {
-    _setInt64(byteOffset, _toInt64(value));
+  void operator[]=(int index, int value) {
+    _setIndexed(index, _toUint8(value));
   }
 
-  int getUint64(int byteOffset) {
-    return _getUint64(byteOffset);
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
   }
 
-  void setUint64(int byteOffset, int value) {
-    _setUint64(byteOffset, _toUint64(value));
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Uint8Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
   }
 
-  double getFloat32(int byteOffset) {
-    return _getFloat32(byteOffset);
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Uint8Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
   }
 
-  void setFloat32(int byteOffset, double value) {
-    _setFloat32(byteOffset, value);
+  String toString() {
+    return Collections.collectionToString(this);
   }
 
-  double getFloat64(int byteOffset) {
-    return _getFloat64(byteOffset);
+  int bytesPerElement() {
+    return 1;
   }
 
-  void setFloat64(int byteOffset, double value) {
-    _setFloat64(byteOffset, value);
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
   }
 
-  // Implementation
+  static _Uint8Array _new(int length) native "Uint8Array_new";
 
-  static _InternalByteArray _allocate(int length)
-    native "InternalByteArray_allocate";
+  int _getIndexed(int index) native "Uint8Array_getIndexed";
 
-  int _getInt8(int byteOffset)
-    native "InternalByteArray_getInt8";
+  void _setIndexed(int index, int value) native "Uint8Array_setIndexed";
+}
 
-  void _setInt8(int byteOffset, int value)
-    native "InternalByteArray_setInt8";
 
-  int _getUint8(int byteOffset)
-    native "InternalByteArray_getUint8";
+class _Int16Array extends _ByteArrayBase implements Int16Array {
+  factory _Int16Array(int length) {
+    return _new(length);
+  }
 
-  void _setUint8(int byteOffset, int value)
-    native "InternalByteArray_setUint8";
+  factory _Int16Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = (array.lengthInBytes() - start) ~/ 2;
+    }
+    return new _Int16ArrayView(array, start, length);
+  }
 
-  int _getInt16(int byteOffset)
-    native "InternalByteArray_getInt16";
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
 
-  void _setInt16(int byteOffset, int value)
-    native "InternalByteArray_setInt16";
+  void operator[]=(int index, int value) {
+    _setIndexed(index, _toInt16(value));
+  }
 
-  int _getUint16(int byteOffset)
-    native "InternalByteArray_getUint16";
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
 
-  void _setUint16(int byteOffset, int value)
-    native "InternalByteArray_setUint16";
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Int16Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
 
-  int _getInt32(int byteOffset)
-    native "InternalByteArray_getInt32";
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Int16Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
 
-  void _setInt32(int byteOffset, int value)
-    native "InternalByteArray_setInt32";
+  String toString() {
+    return Collections.collectionToString(this);
+  }
 
-  int _getUint32(int byteOffset)
-    native "InternalByteArray_getUint32";
+  int bytesPerElement() {
+    return 2;
+  }
 
-  void _setUint32(int byteOffset, int value)
-    native "InternalByteArray_setUint32";
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
 
-  int _getInt64(int byteOffset)
-    native "InternalByteArray_getInt64";
+  static _Int16Array _new(int length) native "Int16Array_new";
 
-  void _setInt64(int byteOffset, int value)
-    native "InternalByteArray_setInt64";
+  int _getIndexed(int index) native "Int16Array_getIndexed";
 
-  int _getUint64(int byteOffset)
-    native "InternalByteArray_getUint64";
+  void _setIndexed(int index, int value) native "Int16Array_setIndexed";
+}
 
-  void _setUint64(int byteOffset, int value)
-    native "InternalByteArray_setUint64";
 
-  double _getFloat32(int byteOffset)
-    native "InternalByteArray_getFloat32";
+class _Uint16Array extends _ByteArrayBase implements Uint16Array {
+  factory _Uint16Array(int length) {
+    return _new(length);
+  }
 
-  void _setFloat32(int byteOffset, double value)
-    native "InternalByteArray_setFloat32";
+  factory _Uint16Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = (array.lengthInBytes() - start) ~/ 2;
+    }
+    return new _Uint16ArrayView(array, start, length);
+  }
 
-  double _getFloat64(int byteOffset)
-    native "InternalByteArray_getFloat64";
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
 
-  void _setFloat64(int byteOffset, double value)
-    native "InternalByteArray_setFloat64";
-}
+  void operator[]=(int index, int value) {
+    _setIndexed(index, _toUint16(value));
+  }
 
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
 
-class _ExternalByteArray extends _ByteArrayBase implements ByteArray {
-  // Collection interface
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Uint16Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
 
-  int get length() {
-    return _length();
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Uint16Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
   }
 
-  // List interface
+  String toString() {
+    return Collections.collectionToString(this);
+  }
 
-  int operator[](int index) {
-    return _getUint8(index);
+  int bytesPerElement() {
+    return 2;
   }
 
-  void operator[]=(int index, int value) {
-    _setUint8(index, value);
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
   }
 
-  // ByteArray interface
+  static _Uint16Array _new(int length) native "Uint16Array_new";
 
-  int getInt8(int byteOffset) {
-    return _getInt8(byteOffset);
+  int _getIndexed(int index) native "Uint16Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "Uint16Array_setIndexed";
+}
+
+
+class _Int32Array extends _ByteArrayBase implements Int32Array {
+  factory _Int32Array(int length) {
+    return _new(length);
   }
 
-  void setInt8(int byteOffset, int value) {
-    _setInt8(byteOffset, _toInt8(value));
+  factory _Int32Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = (array.lengthInBytes() - start) ~/ 4;
+    }
+    return new _Int32ArrayView(array, start, length);
   }
 
-  int getUint8(int byteOffset) {
-    return _getUint8(byteOffset);
+  int operator[](int index) {
+    return _getIndexed(index);
   }
 
-  void setUint8(int byteOffset, int value) {
-    _setUint8(byteOffset, _toUint8(value));
+  void operator[]=(int index, int value) {
+    _setIndexed(index, _toInt32(value));
   }
 
-  int getInt16(int byteOffset) {
-    return _getInt16(byteOffset);
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
   }
 
-  void setInt16(int byteOffset, int value) {
-    _setInt16(byteOffset, _toInt16(value));
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Int32Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
   }
 
-  int getUint16(int byteOffset) {
-    return _getInt16(byteOffset);
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Int32Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
   }
 
-  void setUint16(int byteOffset, int value) {
-    _setUint16(byteOffset, _toUint16(value));
+  String toString() {
+    return Collections.collectionToString(this);
   }
 
-  int getInt32(int byteOffset) {
-    return _getInt32(byteOffset);
+  int bytesPerElement() {
+    return 4;
   }
 
-  void setInt32(int byteOffset, int value) {
-    _setInt32(byteOffset, _toInt32(value));
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
   }
 
-  int getUint32(int byteOffset) {
-    return _getUint32(byteOffset);
+  static _Int32Array _new(int length) native "Int32Array_new";
+
+  int _getIndexed(int index) native "Int32Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "Int32Array_setIndexed";
+}
+
+
+class _Uint32Array extends _ByteArrayBase implements Uint32Array {
+  factory _Uint32Array(int length) {
+    return _new(length);
   }
 
-  void setUint32(int byteOffset, int value) {
-    _setUint32(byteOffset, _toUint32(value));
+  factory _Uint32Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = (array.lengthInBytes() - start) ~/ 4;
+    }
+    return new _Uint32ArrayView(array, start, length);
   }
 
-  int getInt64(int byteOffset) {
-    return _getInt64(byteOffset);
+  int operator[](int index) {
+    return _getIndexed(index);
   }
 
-  void setInt64(int byteOffset, int value) {
-    _setInt64(byteOffset, _toInt64(value));
+  void operator[]=(int index, int value) {
+    _setIndexed(index, _toUint32(value));
   }
 
-  int getUint64(int byteOffset) {
-    return _getUint64(byteOffset);
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
   }
 
-  void setUint64(int byteOffset, int value) {
-    _setUint64(byteOffset, _toUint64(value));
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Uint32Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
   }
 
-  double getFloat32(int byteOffset) {
-    return _getFloat32(byteOffset);
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Uint32Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
   }
 
-  void setFloat32(int byteOffset, double value) {
-    _setFloat32(byteOffset, value);
+  String toString() {
+    return Collections.collectionToString(this);
   }
 
-  double getFloat64(int byteOffset) {
-    return _getFloat64(byteOffset);
+  int bytesPerElement() {
+    return 4;
   }
 
-  void setFloat64(int byteOffset, double value) {
-    _setFloat64(byteOffset, value);
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
   }
 
-  // Implementation
+  static _Uint32Array _new(int length) native "Uint32Array_new";
 
-  int _getInt8(int byteOffset)
-    native "ExternalByteArray_getInt8";
+  int _getIndexed(int index) native "Uint32Array_getIndexed";
 
-  void _setInt8(int byteOffset, int value)
-    native "ExternalByteArray_setInt8";
+  void _setIndexed(int index, int value) native "Uint32Array_setIndexed";
+}
 
-  int _getUint8(int byteOffset)
-    native "ExternalByteArray_getUint8";
 
-  void _setUint8(int byteOffset, int value)
-    native "ExternalByteArray_setUint8";
+class _Int64Array extends _ByteArrayBase implements Int64Array {
+  factory _Int64Array(int length) {
+    return _new(length);
+  }
 
-  int _getInt16(int byteOffset)
-    native "ExternalByteArray_getInt16";
+  factory _Int64Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = (array.lengthInBytes() - start) ~/ 8;
+    }
+    return new _Int64ArrayView(array, start, length);
+  }
 
-  void _setInt16(int byteOffset, int value)
-    native "ExternalByteArray_setInt16";
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
 
-  int _getUint16(int byteOffset)
-    native "ExternalByteArray_getUint16";
+  void operator[]=(int index, int value) {
+    _setIndexed(index, _toInt64(value));
+  }
 
-  void _setUint16(int byteOffset, int value)
-    native "ExternalByteArray_setUint16";
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
 
-  int _getInt32(int byteOffset)
-    native "ExternalByteArray_getInt32";
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Int64Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
 
-  void _setInt32(int byteOffset, int value)
-    native "ExternalByteArray_setInt32";
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Int64Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
 
-  int _getUint32(int byteOffset)
-    native "ExternalByteArray_getUint32";
+  String toString() {
+    return Collections.collectionToString(this);
+  }
 
-  void _setUint32(int byteOffset, int value)
-    native "ExternalByteArray_setUint32";
+  int bytesPerElement() {
+    return 8;
+  }
 
-  int _getInt64(int byteOffset)
-    native "ExternalByteArray_getInt64";
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
 
-  void _setInt64(int byteOffset, int value)
-    native "ExternalByteArray_setInt64";
+  static _Int64Array _new(int length) native "Int64Array_new";
 
-  int _getUint64(int byteOffset)
-    native "ExternalByteArray_getUint64";
+  int _getIndexed(int index) native "Int64Array_getIndexed";
 
-  void _setUint64(int byteOffset, int value)
-    native "ExternalByteArray_setUint64";
+  void _setIndexed(int index, int value) native "Int64Array_setIndexed";
+}
 
-  double _getFloat32(int byteOffset)
-    native "ExternalByteArray_getFloat32";
 
-  void _setFloat32(int byteOffset, double value)
-    native "ExternalByteArray_setFloat32";
+class _Uint64Array extends _ByteArrayBase implements Uint64Array {
+  factory _Uint64Array(int length) {
+    return _new(length);
+  }
 
-  double _getFloat64(int byteOffset)
-    native "ExternalByteArray_getFloat64";
+  factory _Uint64Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = (array.lengthInBytes() - start) ~/ 8;
+    }
+    return new _Uint64ArrayView(array, start, length);
+  }
 
-  void _setFloat64(int byteOffset, double value)
-    native "ExternalByteArray_setFloat64";
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  void operator[]=(int index, int value) {
+    _setIndexed(index, _toUint64(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Uint64Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Uint64Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 8;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  static _Uint64Array _new(int length) native "Uint64Array_new";
+
+  int _getIndexed(int index) native "Uint64Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "Uint64Array_setIndexed";
+}
+
+
+class _Float32Array extends _ByteArrayBase implements Float32Array {
+  factory _Float32Array(int length) {
+    return _new(length);
+  }
+
+  factory _Float32Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = (array.lengthInBytes() - start) ~/ 4;
+    }
+    return new _Float32ArrayView(array, start, length);
+  }
+
+  double operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  void operator[]=(int index, double value) {
+    _setIndexed(index, value);
+  }
+
+  Iterator<double> iterator() {
+    return new _ByteArrayIterator<double>(this);
+  }
+
+  List<double> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Float32Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Float32Array) {
+      int startInBytes = start * _bytesPerElement;
+      int lengthInBytes = length * _bytesPerElement;
+      int startFromInBytes = startFrom * _bytesPerElement;
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return _bytesPerElement;
+  }
+
+  int lengthInBytes() {
+    return _length() * _bytesPerElement;
+  }
+
+  static final int _bytesPerElement = 4;
+
+  static _Float32Array _new(int length) native "Float32Array_new";
+
+  int _getIndexed(int index) native "Float32Array_getIndexed";
+
+  void _setIndexed(int index, double value) native "Float32Array_setIndexed";
+}
+
+
+class _Float64Array extends _ByteArrayBase implements Float64Array {
+  factory _Float64Array(int length) {
+    return _new(length);
+  }
+
+  factory _Float64Array.view(ByteArray array, [int start = 0, int length]) {
+    if (length === null) {
+      length = array.lengthInBytes() ~/ 8;
+    }
+    return new _Float64ArrayView(array, start, length);
+  }
+
+  double operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  void operator[]=(int index, double value) {
+    _setIndexed(index, value);
+  }
+
+  Iterator<double> iterator() {
+    return new _ByteArrayIterator<double>(this);
+  }
+
+  List<double> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Float64Array result = _new(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _Float64Array) {
+      int startInBytes = start * _bytesPerElement;
+      int lengthInBytes = length * _bytesPerElement;
+      int startFromInBytes = startFrom * _bytesPerElement;
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 8;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  static final int _bytesPerElement = 8;
+
+  static _Float64Array _new(int length) native "Float64Array_new";
+
+  int _getIndexed(int index) native "Float64Array_getIndexed";
+
+  void _setIndexed(int index, double value) native "Float64Array_setIndexed";
+}
+
+
+class _ExternalInt8Array extends _ByteArrayBase implements Int8Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, int value) {
+    _setIndexed(index, _toInt8(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  _Int8Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Int8Array result = new Int8Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _ExternalInt8Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 1;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalInt8Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "ExternalInt8Array_setIndexed";
+}
+
+
+class _ExternalUint8Array extends _ByteArrayBase implements Uint8Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, int value) {
+    _setIndexed(index, _toUint8(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  _Uint8Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Uint8Array result = new Uint8Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _ExternalUint8Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 1;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalUint8Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "ExternalUint8Array_setIndexed";
+}
+
+
+class _ExternalInt16Array extends _ByteArrayBase implements Int16Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, int value) {
+    _setIndexed(index, _toInt16(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  _Int16Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Int16Array result = new Int16Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _ExternalInt16Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 2;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalInt16Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "ExternalInt16Array_setIndexed";
+}
+
+
+class _ExternalUint16Array extends _ByteArrayBase implements Uint16Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, int value) {
+    _setIndexed(index, _toUint16(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  _Uint16Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Uint16Array result = new Uint16Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _ExternalUint16Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 2;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalUint16Array_getIndexed";
+
+  void _setIndexed(int index, int value)
+      native "ExternalUint16Array_setIndexed";
+}
+
+
+class _ExternalInt32Array extends _ByteArrayBase implements Int32Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, int value) {
+    _setIndexed(index, _toInt32(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  _Int32Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Int32Array result = new Int32Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _ExternalInt32Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 4;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalInt32Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "ExternalInt32Array_setIndexed";
+}
+
+
+class _ExternalUint32Array extends _ByteArrayBase implements Uint32Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, int value) {
+    _setIndexed(index, _toUint32(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  _Uint32Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Uint32Array result = new Uint32Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _ExternalUint32Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 4;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalUint32Array_getIndexed";
+
+  void _setIndexed(int index, int value)
+      native "ExternalUint32Array_setIndexed";
+}
+
+
+class _ExternalInt64Array extends _ByteArrayBase implements Int64Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, int value) {
+    _setIndexed(index, _toInt64(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  _Int64Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Int64Array result = new Int64Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _ExternalInt64Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 8;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalInt64Array_getIndexed";
+
+  void _setIndexed(int index, int value) native "ExternalInt64Array_setIndexed";
+}
+
+
+class _ExternalUint64Array extends _ByteArrayBase implements Uint64Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, int value) {
+    _setIndexed(index, _toUint64(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  _Uint64Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Uint64Array result = new Uint64Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    if (from is _ExternalUint64Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 8;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalUint64Array_getIndexed";
+
+  void _setIndexed(int index, int value)
+      native "ExternalUint64Array_setIndexed";
+}
+
+
+class _ExternalFloat32Array extends _ByteArrayBase implements Float32Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, double value) {
+    _setIndexed(index, value);
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<double>(this);
+  }
+
+  _Float32Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Float32Array result = new Float32Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<double> from, [int startFrom = 0]) {
+    if (from is _ExternalFloat32Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 4;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalFloat32Array_getIndexed";
+
+  void _setIndexed(int index, int value)
+      native "ExternalFloat32Array_setIndexed";
+}
+
+
+class _ExternalFloat64Array extends _ByteArrayBase implements Float64Array {
+  int operator[](int index) {
+    return _getIndexed(index);
+  }
+
+  int operator[]=(int index, double value) {
+    _setIndexed(index, value);
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<double>(this);
+  }
+
+  _Float64Array getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    _Float64Array result = new Float64Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<double> from, [int startFrom = 0]) {
+    if (from is _ExternalFloat64Array) {
+      int startInBytes = start * bytesPerElement();
+      int lengthInBytes = length * bytesPerElement();
+      int startFromInBytes = startFrom * bytesPerElement();
+      _setRange(startInBytes, lengthInBytes, from, startFromInBytes);
+    } else {
+      Arrays.copy(from, startFrom, this, start, length);
+    }
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 8;
+  }
+
+  int lengthInBytes() {
+    return _length() * bytesPerElement();
+  }
+
+  int _getIndexed(int index) native "ExternalFloat64Array_getIndexed";
+
+  void _setIndexed(int index, int value)
+      native "ExternalFloat64Array_setIndexed";
+}
+
+
+class _ByteArrayIterator<E> implements Iterator<E> {
+  _ByteArrayIterator(_ByteArrayBase array)
+      : _array = array, _length = array.length, _pos = 0 {
+    assert(array is _ByteArrayBase);

[Ivan Posva, 2012/05/03 05:53:19]

Isn't this assert redundant? This test will already be executed as part of the
parameter checking when running in checked mode.

[cshapiro, 2012/05/04 04:42:04]

Removed.

+  }
+
+  bool hasNext() {
+   return _length > _pos;
+  }
+
+  E next() {
+    if (!hasNext()) {
+      throw const NoMoreElementsException();
+    }
+    return _array[_pos++];
+  }
+
+  final List<E> _array;
+
+  final int _length;
+
+  int _pos;
+}
+
+
+class _ByteArrayView implements ByteArray {
+  _ByteArrayView(this._array, this._offset, this._length) {
+  }
+
+  int lengthInBytes() {
+    return _length;
+  }
+
+  ByteArray subByteArray([int start = 0, int length]) {
+    if (length === null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return new _ByteArrayView(_array, _offset + start, length);
+  }
+
+  int getInt8(int byteOffset) {
+    return _array._getInt8(_offset + byteOffset);
+  }
+  void setInt8(int byteOffset, int value) {
+    _array._setInt8(_offset + byteOffset, value);
+  }
+
+  int getUint8(int byteOffset) {
+    return _array._getUint8(_offset + byteOffset);
+  }
+  void setUint8(int byteOffset, int value) {
+    _array._setUint8(_offset + byteOffset, value);
+  }
+
+  int getInt16(int byteOffset) {
+    return _array._getInt16(_offset + byteOffset);
+  }
+  void setInt16(int byteOffset, int value) {
+    _array._setInt16(_offset + byteOffset, value);
+  }
+
+  int getUint16(int byteOffset) {
+    return _array._getUint16(_offset + byteOffset);
+  }
+  void setUint16(int byteOffset, int value) {
+    _array._setUint16(_offset + byteOffset, value);
+  }
+
+  int getInt32(int byteOffset) {
+    return _array._getInt32(_offset + byteOffset);
+  }
+  void setInt32(int byteOffset, int value) {
+    _array._setInt32(_offset + byteOffset, value);
+  }
+
+  int getUint32(int byteOffset) {
+    return _array._getUint32(_offset + byteOffset);
+  }
+  void setUint32(int byteOffset, int value) {
+    _array._setUint32(_offset + byteOffset, value);
+  }
+
+  int getInt64(int byteOffset) {
+    return _array._getInt64(_offset + byteOffset);
+  }
+  void setInt64(int byteOffset, int value) {
+    _array._setInt64(_offset + byteOffset, value);
+  }
+
+  int getUint64(int byteOffset) {
+    return _array._getUint64(_offset + byteOffset);
+  }
+  void setUint64(int byteOffset, int value) {
+    _array._setUint64(_offset + byteOffset, value);
+  }
+
+  double getFloat32(int byteOffset) {
+    return _array._getFloat32(_offset + byteOffset);
+  }
+  void setFloat32(int byteOffset, double value) {
+    _array._setFloat32(_offset + byteOffset, value);
+  }
+
+  double getFloat64(int byteOffset) {
+    return _array._getFloat64(_offset + byteOffset);
+  }
+  void setFloat64(int byteOffset, double value) {
+    _array._setFloat64(_offset + byteOffset, value);
+  }
+
+  final _ByteArrayBase _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _ByteArrayViewBase<E> {

[Ivan Posva, 2012/05/03 05:53:19]

The use of E in this case is inconsistent to the _ByteArrayBase above. Also you
are not passing a type parameter in any of the subclasses. Please either remove
the E and or make it consistent.

[cshapiro, 2012/05/04 04:42:04]

Removed.

+  void add(E value) {
+    throw const UnsupportedOperationException(
+        "Cannot add to a non-extendable array");
+  }
+
+  void addLast(E value) {
+    throw const UnsupportedOperationException(
+        "Cannot add to a non-extendable array");
+  }
+
+  void addAll(Collection<int> value) {

[Ivan Posva, 2012/05/03 05:53:19]

If you keep E then please change this to "Collection<E>".

[cshapiro, 2012/05/04 04:42:04]

Removed.

+    throw const UnsupportedOperationException(
+        "Cannot add to a non-extendable array");
+  }
+
+  void clear() {
+    throw const UnsupportedOperationException(
+        "Cannot remove from a non-extendable array");
+  }
+
+  void insertRange(int start, int length, [E initialValue]) {
+    throw const UnsupportedOperationException(
+        "Cannot add to a non-extendable array");
+  }
+
+  set length(int newLength) {
+    throw const UnsupportedOperationException(
+        "Cannot resize a non-extendable array");
+  }
+
+  int removeLast() {
+    throw const UnsupportedOperationException(
+        "Cannot remove from a non-extendable array");
+  }
+
+  void removeRange(int start, int length) {
+    throw const UnsupportedOperationException(
+        "Cannot remove from a non-extendable array");
+  }
+}
+
+
+class _Int8ArrayView extends _ByteArrayViewBase implements Int8Array {
+  _Int8ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  int operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getInt8(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, int value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setInt8(_offset + (index * bytesPerElement()), _toInt8(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Int8Array result = new Int8Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 1;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Uint8ArrayView extends _ByteArrayViewBase implements Uint8Array {
+  _Uint8ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  int operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getUint8(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, int value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setUint8(_offset + (index * bytesPerElement()), _toUint8(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Uint8Array result = new Uint8Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 1;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Int16ArrayView extends _ByteArrayViewBase implements Int16Array {
+  _Int16ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  int operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getInt16(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, int value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setInt16(_offset + (index * bytesPerElement()), _toInt16(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Int16Array result = new Int16Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 2;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Uint16ArrayView extends _ByteArrayViewBase implements Uint16Array {
+  _Uint16ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  int operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getUint16(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, int value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setUint16(_offset + (index * bytesPerElement()), _toUint16(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Uint16Array result = new Uint16Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 2;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Int32ArrayView extends _ByteArrayViewBase implements Int32Array {
+  _Int32ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  int operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getInt32(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, int value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setInt32(_offset + (index * bytesPerElement()), _toInt32(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Int32Array result = new Int32Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 4;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Uint32ArrayView extends _ByteArrayViewBase implements Uint32Array {
+  _Uint32ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  int operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getUint32(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, int value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setUint32(_offset + (index * bytesPerElement()), _toUint32(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Uint32Array result = new Uint32Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 4;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Int64ArrayView extends _ByteArrayViewBase implements Int64Array {
+  _Int64ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  int operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getInt64(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, int value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setInt64(_offset + (index * bytesPerElement()), _toInt64(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Int64Array result = new Int64Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 8;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Uint64ArrayView extends _ByteArrayViewBase implements Uint64Array {
+  _Uint64ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  int operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getUint64(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, int value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setUint64(_offset + (index * bytesPerElement()), _toUint64(value));
+  }
+
+  Iterator<int> iterator() {
+    return new _ByteArrayIterator<int>(this);
+  }
+
+  List<int> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Uint64Array result = new Uint64Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<int> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 8;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Float32ArrayView extends _ByteArrayViewBase<double> implements Float32Array {
+  _Float32ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  double operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getFloat32(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, double value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setFloat32(_offset + (index * bytesPerElement()), value);
+  }
+
+  Iterator<double> iterator() {
+    return new _ByteArrayIterator<double>(this);
+  }
+
+  List<double> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Float32Array result = new Float32Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<double> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 4;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
+}
+
+
+class _Float64ArrayView extends _ByteArrayViewBase<double> implements Float64Array {
+  _Float64ArrayView(ByteArray array, [int offsetInBytes = 0, int length])
+    : _array = array,
+      _offset = offsetInBytes,
+      _length = (length === null) ? (array.lengthInBytes() - offsetInBytes)
+    : length {
+    if (offsetInBytes < 0 || offsetInBytes >= array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(offsetInBytes);
+    }
+    int lengthInBytes = length * bytesPerElement();
+    if (length < 0 || (lengthInBytes + _offset) > array.lengthInBytes()) {
+      throw new IndexOutOfRangeException(length);
+    }
+  }
+
+  get length() {
+    return _length;
+  }
+
+  double operator[](int index) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    return _array.getFloat64(_offset + (index * bytesPerElement()));
+  }
+
+  void operator[]=(int index, double value) {
+    if (index < 0 || index >= _length) {
+      throw new IndexOutOfRangeException(index);
+    }
+    _array.setFloat64(_offset + (index * bytesPerElement()), value);
+  }
+
+  Iterator<double> iterator() {
+    return new _ByteArrayIterator<double>(this);
+  }
+
+  List<double> getRange(int start, int length) {
+    Arrays.rangeCheck(this, start, length);
+    Float64Array result = new Float64Array(length);
+    result.setRange(0, length, this, start);
+    return result;
+  }
+
+  void setRange(int start, int length, List<double> from, [int startFrom = 0]) {
+    Arrays.copy(from, startFrom, this, start, length);
+  }
+
+  String toString() {
+    return Collections.collectionToString(this);
+  }
+
+  int bytesPerElement() {
+    return 8;
+  }
+
+  int lengthInBytes() {
+    return _length * bytesPerElement();
+  }
+
+  ByteArray asByteArray([int start = 0, int length]) {
+    if (length == null) {
+      length = this.lengthInBytes();
+    }
+    Arrays.rangeCheck(start, length);
+    return _array.subByteArray(_offset + start, length);
+  }
+
+  final ByteArray _array;
+  final int _offset;
+  final int _length;
 }