Add ByteArray interface and provide internal and external implementations.

runtime/lib/byte_buffer.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.
-
-class ByteBuffer implements List {
-  factory ByteBuffer(int length) {
-    return _allocate(length);
-  }
-
-  int getInt8(int byteOffset) {
-    return _getInt8(byteOffset);
-  }
-  void setInt8(int byteOffset, int value) {
-    _setInt8(byteOffset, value);
-  }
-
-  int getUint8(int byteOffset) {
-    return _getUint8(byteOffset);
-  }
-  void setUint8(int byteOffset, int value) {
-    _setUint8(byteOffset, value);
-  }
-
-  int getInt16(int byteOffset) {
-    return _getInt16(byteOffset);
-  }
-  void setInt16(int byteOffset, int value) {
-    _setInt16(byteOffset, value);
-  }
-
-  int getUint16(int byteOffset) {
-    return _getInt16(byteOffset);
-  }
-  void setUint16(int byteOffset, int value) {
-    _setUint16(byteOffset, value);
-  }
-
-  int getInt32(int byteOffset) {
-    return _getInt32(byteOffset);
-  }
-  void setInt32(int byteOffset, int value) {
-    _setInt32(byteOffset, value);
-  }
-
-  int getUint32(int byteOffset) {
-    return _getUint32(byteOffset);
-  }
-  void setUint32(int byteOffset, int value) {
-    _setUint32(byteOffset, value);
-  }
-
-  int getInt64(int byteOffset) {
-    return _getInt64(byteOffset);
-  }
-  void setInt64(int byteOffset, int value) {
-    _setInt64(byteOffset, value);
-  }
-
-  int getUint64(int byteOffset) {
-    return _getUint64(byteOffset);
-  }
-  void setUint64(int byteOffset, int value) {
-    _setUint64(byteOffset, value);
-  }
-
-  double getFloat32(int byteOffset) {
-    return _getFloat32(byteOffset);
-  }
-  void setFloat32(int byteOffset, double value) {
-    _setFloat32(byteOffset, value);
-  }
-
-  double getFloat64(int byteOffset) {
-    return _getFloat64(byteOffset);
-  }
-  void setFloat64(int byteOffset, double value) {
-    _setFloat64(byteOffset, value);
-  }
-
-  // Iterable interface
-
-  Iterator iterator() {
-    return new ByteBufferIterator(this);
-  }
-
-  // Collection interface
-
-  int get length() {
-    return _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);
-  }
-
-  Collection filter(bool f(int element)) {
-    return Collections.filter(this, new GrowableObjectArray(), f);
-  }
-
-  void forEach(f(int element)) {
-    Collections.forEach(this, f);
-  }
-
-  bool isEmpty() {
-    return this.length === 0;
-  }
-
-  bool some(bool f(int element)) {
-    return Collections.some(this, f);
-  }
-
-  // List interface
-
-  int operator[](int index) {
-    return _getUint8(index);
-  }
-
-  void operator[]=(int index, int value) {
-    _setUint8(index, value);
-  }
-
-  void set length(int newLength) {
-    throw const UnsupportedOperationException("Cannot add to a byte buffer");
-  }
-
-  void add(int element) {
-    throw const UnsupportedOperationException("Cannot add to a byte buffer");
-  }
-
-  void addLast(int element) {
-    add(element);
-  }
-
-  void addAll(Collection elements) {
-    throw const UnsupportedOperationException("Cannot add to a byte buffer");
-  }
-
-  void sort(int compare(int a,  b)) {
-    DualPivotQuicksort.sort(this, compare);
-  }
-
-  int indexOf(int element, [int start = 0]) {
-    return Arrays.indexOf(this, element, start, this.length);
-  }
-
-  int lastIndexOf(int element, [int start = null]) {
-    if (start === null) start = length - 1;
-    return Arrays.lastIndexOf(this, element, start);
-  }
-
-  void clear() {
-    throw const UnsupportedOperationException("Cannot clear a byte buffer");
-  }
-
-  int removeLast() {
-    throw const UnsupportedOperationException(
-      "Cannot remove from a byte buffer");
-  }
-
-  int last() {
-    return this[length - 1];
-  }
-
-  // Implementation
-
-  static ByteBuffer _allocate(int length) native "ByteBuffer_allocate";
-
-  int _length() native "ByteBuffer_getLength";
-
-  int _getInt8(int byteOffset) native "ByteBuffer_getInt8";
-  void _setInt8(int byteOffset, int value) native "ByteBuffer_setInt8";
-
-  int _getUint8(int byteOffset) native "ByteBuffer_getUint8";
-  void _setUint8(int byteOffset, int value) native "ByteBuffer_setUint8";
-
-  int _getInt16(int byteOffset) native "ByteBuffer_getInt16";
-  void _setInt16(int byteOffset, int value) native "ByteBuffer_setInt16";
-
-  int _getUint16(int byteOffset) native "ByteBuffer_getUint16";
-  void _setUint16(int byteOffset, int value) native "ByteBuffer_setUint16";
-
-  int _getInt32(int byteOffset) native "ByteBuffer_getInt32";
-  void _setInt32(int byteOffset, int value) native "ByteBuffer_setInt32";
-
-  int _getUint32(int byteOffset) native "ByteBuffer_getUint32";
-  void _setUint32(int byteOffset, int value) native "ByteBuffer_setUint32";
-
-  int _getInt64(int byteOffset) native "ByteBuffer_getInt64";
-  void _setInt64(int byteOffset, int value) native "ByteBuffer_setInt64";
-
-  int _getUint64(int byteOffset) native "ByteBuffer_getUint64";
-  void _setUint64(int byteOffset, int value) native "ByteBuffer_setUint64";
-
-  double _getFloat32(int byteOffset) native "ByteBuffer_getFloat32";
-  void _setFloat32(int byteOffset, double value) native "ByteBuffer_setFloat32";
-
-  double _getFloat64(int byteOffset) native "ByteBuffer_getFloat64";
-  void _setFloat64(int byteOffset, double value) native "ByteBuffer_setFloat64";
-}
-
-
-class ByteBufferIterator implements Iterator {
-  ByteBufferIterator(List byteBuffer)
-      : _byteBuffer = byteBuffer, _length = byteBuffer.length, _pos = 0 {
-    assert(byteBuffer is ByteBuffer);
-  }
-
-  bool hasNext() {
-   return _length > _pos;
-  }
-
-  int next() {
-    if (!hasNext()) {
-      throw const NoMoreElementsException();
-    }
-    return _byteBuffer[_pos++];
-  }
-
-  final List _byteBuffer;
-  final int _length;  // Cache byte buffer length for faster access.
-  int _pos;
-}