Remove support for 'dart:scalarlist' in the Dart VM.

sdk/lib/scalarlist/byte_arrays.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.scalarlist;
-
-/**
- * A random-access sequence of bytes that also provides random access to
- * the fixed-width integers and floating point numbers represented by
- * those bytes. Byte arrays may be used to pack and unpack data from
- * external sources (such as networks or files systems), and to process
- * large quantities of numerical data more efficiently than would be possible
- * with ordinary [List] implementations. Byte arrays can save space, by
- * eliminating the need for object headers, and time, by eliminating the
- * need for data copies. Finally, Byte arrays may be used to intentionally
- * reinterpret the bytes representing one arithmetic type as another.
- * For example this code fragment determine what 64-bit signed integer
- * is represented by the bytes of a 64-bit floating point number:
- *
- *     var ba = new Uint8List(8).asByteArray();
- *     ba.setFloat64(0, 3.14159265358979323846);
- *     int huh = ba.getInt64(0);
- */
-abstract class ByteArray {
-  /**
-   * Returns the length of this byte array, in bytes.
-   */
-  int lengthInBytes();
-
-  // TODO(lrn): Change the signature to match String.substring.
-  /**
-   * Returns a [ByteArray] _view_ of a portion of this byte array.
-   * The returned byte array consists of [length] bytes starting
-   * at position [start] in this byte array. The returned byte array
-   * is backed by the same data as this byte array. In other words,
-   * changes to the returned byte array are visible in this byte array
-   * and vice-versa.
-   *
-   * Throws [RangeError] if [start] or [length] are negative, or
-   * if `start + length` is greater than the length of this byte array.
-   *
-   * Throws [ArgumentError] if [length] is negative.
-   */
-  ByteArray subByteArray([int start, int length]);
-
-  /**
-   * Returns the (possibly negative) integer represented by the byte at the
-   * specified [byteOffset] in this byte array, in two's complement binary
-   * representation. The return value will be between -128 and 127, inclusive.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * greater than or equal to the length of this byte array.
-   */
-  int getInt8(int byteOffset);
-
-  /**
-   * Sets the byte at the specified [byteOffset] in this byte array to the
-   * two's complement binary representation of the specified [value], which
-   * must fit in a single byte. In other words, [value] must be between
-   * -128 and 127, inclusive.
-   *
-   * Returns `byteOffset + 1`, which is the offset of the first byte in the
-   * array after the byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * greater than or equal to the length of this byte array.
-   *
-   * Throws [ArgumentError] if [value] is less than -128 or
-   * greater than 127.
-   */
-  int setInt8(int byteOffset, int value);
-
-  /**
-   * Returns the positive integer represented by the byte at the specified
-   * [byteOffset] in this byte array, in unsigned binary form. The
-   * return value will be between 0 and 255, inclusive.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * greater than or equal to the length of this byte array.
-   */
-  int getUint8(int byteOffset);
-
-  /**
-   * Sets the byte at the specified [byteOffset] in this byte array to the
-   * unsigned binary representation of the specified [value], which must fit
-   * in a single byte. in other words, [value] must be between 0 and 255,
-   * inclusive.
-   *
-   * Returns `byteOffset + 1`, which is the offset of the first byte in the
-   * array after the byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative,
-   * or greater than or equal to the length of this byte array.
-   *
-   * Throws [ArgumentError] if [value] is negative or
-   * greater than 255.
-   */
-  int setUint8(int byteOffset, int value);
-
-  /**
-   * Returns the (possibly negative) integer represented by the two bytes at
-   * the specified [byteOffset] in this byte array, in two's complement binary
-   * form. The return value will be between 2<sup>15</sup> and 2<sup>15 - 1,
-   * inclusive.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 2` is greater than the length of this byte array.
-   */
-  int getInt16(int byteOffset);
-
-  /**
-   * Sets the two bytes starting at the specified [byteOffset] in this
-   * byte array to the two's complement binary representation of the specified
-   * [value], which must fit in two bytes. In other words, [value] must lie
-   * between 2<sup>15</sup> and 2<sup>15 - 1, inclusive.
-   *
-   * Returns `byteOffset + 2`, which is the offset of the first byte in the
-   * array after the last byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 2` is greater than the length of this byte array.
-   *
-   * Throws [ArgumentError] if [value] is less than 2<sup>15</sup>
-   * or greater than 2<sup>15 - 1.
-   */
-  int setInt16(int byteOffset, int value);
-
-  /**
-   * Returns the positive integer represented by the two bytes starting
-   * at the specified [byteOffset] in this byte array, in unsigned binary
-   * form. The return value will be between 0 and  2<sup>16 - 1, inclusive.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 2` is greater than the length of this byte array.
-   */
-  int getUint16(int byteOffset);
-
-  /**
-   * Sets the two bytes starting at the specified [byteOffset] in this byte
-   * array to the unsigned binary representation of the specified [value],
-   * which must fit in two bytes. in other words, [value] must be between
-   * 0 and 2<sup>16 - 1, inclusive.
-   *
-   * Returns `byteOffset + 2`, which is the offset of the first byte in the
-   * array after the last byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 2` is greater than the length of this byte array.
-   *
-   * Throws [ArgumentError] if [value] is negative or
-   * greater than 2<sup>16 - 1.
-   */
-  int setUint16(int byteOffset, int value);
-
-  /**
-   * Returns the (possibly negative) integer represented by the four bytes at
-   * the specified [byteOffset] in this byte array, in two's complement binary
-   * form. The return value will be between 2<sup>31</sup> and 2<sup>31 - 1,
-   * inclusive.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 4` is greater than the length of this byte array.
-   */
-  int getInt32(int byteOffset);
-
-  /**
-   * Sets the four bytes starting at the specified [byteOffset] in this
-   * byte array to the two's complement binary representation of the specified
-   * [value], which must fit in four bytes. In other words, [value] must lie
-   * between 2<sup>31</sup> and 2<sup>31 - 1, inclusive.
-   *
-   * Returns `byteOffset + 4`, which is the offset of the first byte in the
-   * array after the last byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 4` is greater than the length of this byte array.
-   *
-   * Throws [ArgumentError] if [value] is less than 2<sup>31</sup>
-   * or greater than 2<sup>31 - 1.
-   */
-  int setInt32(int byteOffset, int value);
-
-  /**
-   * Returns the positive integer represented by the four bytes starting
-   * at the specified [byteOffset] in this byte array, in unsigned binary
-   * form. The return value will be between 0 and  2<sup>32 - 1, inclusive.
-   *
-   */
-  int getUint32(int byteOffset);
-
-  /**
-   * Sets the four bytes starting at the specified [byteOffset] in this byte
-   * array to the unsigned binary representation of the specified [value],
-   * which must fit in four bytes. in other words, [value] must be between
-   * 0 and 2<sup>32 - 1, inclusive.
-   *
-   * Returns `byteOffset + 4`, which is the offset of the first byte in the
-   * array after the last byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 4` is greater than the length of this byte array.
-   *
-   * Throws [ArgumentError] if [value] is negative or
-   * greater than 2<sup>32 - 1.
-   */
-  int setUint32(int byteOffset, int value);
-
-  /**
-   * Returns the (possibly negative) integer represented by the eight bytes at
-   * the specified [byteOffset] in this byte array, in two's complement binary
-   * form. The return value will be between 2<sup>63</sup> and 2<sup>63 - 1,
-   * inclusive.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 8` is greater than the length of this byte array.
-   */
-  int getInt64(int byteOffset);
-
-  /**
-   * Sets the eight bytes starting at the specified [byteOffset] in this
-   * byte array to the two's complement binary representation of the specified
-   * [value], which must fit in eight bytes. In other words, [value] must lie
-   * between 2<sup>63</sup> and 2<sup>63 - 1, inclusive.
-   *
-   * Returns `byteOffset + 8`, which is the offset of the first byte in the
-   * array after the last byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 8` is greater than the length of this byte array.
-   *
-   * Throws [ArgumentError] if [value] is less than 2<sup>63</sup>
-   * or greater than 2<sup>63 - 1.
-   */
-  int setInt64(int byteOffset, int value);
-
-  /**
-   * Returns the positive integer represented by the eight bytes starting
-   * at the specified [byteOffset] in this byte array, in unsigned binary
-   * form. The return value will be between 0 and  2<sup>64 - 1, inclusive.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 8` is greater than the length of this byte array.
-   */
-  int getUint64(int byteOffset);
-
-  /**
-   * Sets the eight bytes starting at the specified [byteOffset] in this byte
-   * array to the unsigned binary representation of the specified [value],
-   * which must fit in eight bytes. in other words, [value] must be between
-   * 0 and 2<sup>64 - 1, inclusive.
-   *
-   * Returns `byteOffset + 8`, which is the offset of the first byte in the
-   * array after the last byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 8` is greater than the length of this byte array.
-   *
-   * Throws [ArgumentError] if [value] is negative or
-   * greater than 2<sup>64 - 1.
-   */
-  int setUint64(int byteOffset, int value);
-
-  /**
-   * Returns the floating point number represented by the four bytes at
-   * the specified [byteOffset] in this byte array, in IEEE 754
-   * single-precision binary floating-point format (binary32).
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 4` is greater than the length of this byte array.
-   */
-  double getFloat32(int byteOffset);
-
-  /**
-   * Sets the four bytes starting at the specified [byteOffset] in this
-   * byte array to the IEEE 754 single-precision binary floating-point
-   * (binary32) representation of the specified [value].
-   *
-   * **Note that this method can lose precision.** The input [value] is
-   * a 64-bit floating point value, which will be converted to 32-bit
-   * floating point value by IEEE 754 rounding rules before it is stored.
-   * If [value] cannot be represented exactly as a binary32, it will be
-   * converted to the nearest binary32 value.  If two binary32 values are
-   * equally close, the one whose least significant bit is zero will be used.
-   * Note that finite (but large) values can be converted to infinity, and
-   * small non-zero values can be converted to zero.
-   *
-   * Returns `byteOffset + 4`, which is the offset of the first byte in the
-   * array after the last byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 4` is greater than the length of this byte array.
-   */
-  int setFloat32(int byteOffset, double value);
-
-  /**
-   * Returns the floating point number represented by the eight bytes at
-   * the specified [byteOffset] in this byte array, in IEEE 754
-   * double-precision binary floating-point format (binary64).
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 8` is greater than the length of this byte array.
-   */
-  double getFloat64(int byteOffset);
-
-  /**
-   * Sets the eight bytes starting at the specified [byteOffset] in this
-   * byte array to the IEEE 754 double-precision binary floating-point
-   * (binary64) representation of the specified [value].
-   *
-   * Returns `byteOffset + 8`, which is the offset of the first byte in the
-   * array after the last byte that was set by this call. This return value can
-   * be passed as the [byteOffset] parameter to a subsequent `setXxx` call.
-   *
-   * Throws [RangeError] if [byteOffset] is negative, or
-   * `byteOffset + 8` is greater than the length of this byte array.
-   */
-  int setFloat64(int byteOffset, double value);
-}
-
-/**
- * A "mixin interface" that allows a type, typically but not necessarily
- * a [List], to be viewed as a [ByteArray].
- */
-abstract class ByteArrayViewable {
-  /**
-   * Returns the number of bytes in the representation of each element in
-   * this list, or the number bytes in the representation of the entire
-   * object if it is not a list.
-   */
-  int bytesPerElement();
-
-  /**
-   * Returns the length of this view, in bytes.
-   */
-  int lengthInBytes();
-
-  /**
-   * Returns the byte array view of this object. This view allows the
-   * byte representation of the object to be read and written directly.
-   */
-  ByteArray asByteArray([int start, int length]);
-}
-
-
-/**
- * A fixed-length list of 8-bit signed integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- */
-abstract class Int8List implements List<int>, ByteArrayViewable {
-  /**
-   * Creates an [Int8List] of the specified length (in elements), all of
-   * whose elements are initially zero.
-   */
-  external factory Int8List(int length);
-
-  /**
-   * Creates an [Int8List] _view_ of the specified region in the specified
-   * byte [array]. Changes in the [Int8List] will be visible in the byte
-   * array and vice versa. If the [start] index of the region is not specified,
-   * it defaults to zero (the first byte in the byte array). If the length is
-   * not specified, it defaults to null, which indicates that the view extends
-   * to the end of the byte array.
-   */
-  external factory Int8List.view(ByteArray array, [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of 8-bit unsigned integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- */
-abstract class Uint8List implements List<int>, ByteArrayViewable {
-  /**
-   * Creates a [Uint8List] of the specified length (in elements), all of
-   * whose elements are initially zero.
-   */
-  external factory Uint8List(int length);
-
-  /**
-   * Creates a [Uint8List] _view_ of the specified region in the specified
-   * byte [array]. Changes in the [Uint8List] will be visible in the byte
-   * array and vice versa. If the [start] index of the region is not specified,
-   * it defaults to zero (the first byte in the byte array). If the length is
-   * not specified, it defaults to null, which indicates that the view extends
-   * to the end of the byte array.
-   */
-  external factory Uint8List.view(ByteArray array, [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of 8-bit unsigned integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- * Indexed store clamps the value to range 0..0xFF.
- */
-abstract class Uint8ClampedList implements List<int>, ByteArrayViewable {
-  /**
-   * Creates a [Uint8ClampedList] of the specified length (in elements), all of
-   * whose elements are initially zero.
-   */
-  external factory Uint8ClampedList(int length);
-
-  /**
-   * Creates a [Uint8ClampedList] _view_ of the specified region in the
-   * specified byte [array]. Changes in the [Uint8List] will be visible in the
-   * byte array and vice versa. If the [start] index of the region is not
-   * specified, it defaults to zero (the first byte in the byte array). If the
-   * length is not specified, it defaults to null, which indicates that the view
-   * extends to the end of the byte array.
-   */
-  external factory Uint8ClampedList.view(ByteArray array,
-                                         [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of 16-bit signed integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- */
-abstract class Int16List implements List<int>, ByteArrayViewable {
-  /**
-   * Creates an [Int16List] of the specified length (in elements), all of
-   * whose elements are initially zero.
-   */
-  external factory Int16List(int length);
-
-  /**
-   * Creates an [Int16List] _view_ of the specified region in the specified
-   * byte [array]. Changes in the [Int16List] will be visible in the byte
-   * array and vice versa. If the [start] index of the region is not specified,
-   * it defaults to zero (the first byte in the byte array). If the length is
-   * not specified, it defaults to null, which indicates that the view extends
-   * to the end of the byte array.
-   *
-   * Throws [ArgumentError] if the length of the specified region
-   * is not divisible by 2 (the size of an "int16" in bytes), or if the
-   * [start] of the region is not divisible by 2. If, however, [array]
-   * is a view of another byte array, this constructor will throw
-   * [ArgumentError] if the implicit starting position in the
-   * "ultimately backing" byte array is not divisible by 2. In plain terms,
-   * this constructor throws [ArgumentError] if the specified
-   * region does not contain an integral number of "int16s," or if it
-   * is not "int16-aligned."
-   */
-  external factory Int16List.view(ByteArray array, [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of 16-bit unsigned integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- */
-abstract class Uint16List implements List<int>, ByteArrayViewable {
-  /**
-   * Creates a [Uint16List] of the specified length (in elements), all
-   * of whose elements are initially zero.
-   */
-  external factory Uint16List(int length);
-
-  /**
-   * Creates a [Uint16List] _view_ of the specified region in
-   * the specified byte [array]. Changes in the [Uint16List] will be
-   * visible in the byte array and vice versa. If the [start] index of the
-   * region is not specified, it defaults to zero (the first byte in the byte
-   * array). If the length is not specified, it defaults to null, which
-   * indicates that the view extends to the end of the byte array.
-   *
-   * Throws [ArgumentError] if the length of the specified region
-   * is not divisible by 2 (the size of a "uint16" in bytes), or if the
-   * [start] of the region is not divisible by 2. If, however, [array]
-   * is a view of another byte array, this constructor will throw
-   * [ArgumentError] if the implicit starting position in the
-   * "ultimately backing" byte array is not divisible by 2. In plain terms,
-   * this constructor throws [ArgumentError] if the specified
-   * region does not contain an integral number of "uint16s," or if it
-   * is not "uint16-aligned."
-   */
-  external factory Uint16List.view(ByteArray array,
-                                   [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of 32-bit signed integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- */
-abstract class Int32List implements List<int>, ByteArrayViewable {
-  /**
-   * Creates an [Int32List] of the specified length (in elements), all of
-   * whose elements are initially zero.
-   */
-  external factory Int32List(int length);
-
-  /**
-   * Creates an [Int32List] _view_ of the specified region in the specified
-   * byte [array]. Changes in the [Int32List] will be visible in the byte
-   * array and vice versa. If the [start] index of the region is not specified,
-   * it defaults to zero (the first byte in the byte array). If the length is
-   * not specified, it defaults to null, which indicates that the view extends
-   * to the end of the byte array.
-   *
-   * Throws [ArgumentError] if the length of the specified region
-   * is not divisible by 4 (the size of an "int32" in bytes), or if the
-   * [start] of the region is not divisible by 4. If, however, [array]
-   * is a view of another byte array, this constructor will throw
-   * [ArgumentError] if the implicit starting position in the
-   * "ultimately backing" byte array is not divisible by 4. In plain terms,
-   * this constructor throws [ArgumentError] if the specified
-   * region does not contain an integral number of "int32s," or if it
-   * is not "int32-aligned."
-   */
-  external factory Int32List.view(ByteArray array, [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of 32-bit unsigned integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- */
-abstract class Uint32List implements List<int>, ByteArrayViewable {
-  /**
-   * Creates a [Uint32List] of the specified length (in elements), all
-   * of whose elements are initially zero.
-   */
-  external factory Uint32List(int length);
-
-  /**
-   * Creates a [Uint32List] _view_ of the specified region in
-   * the specified byte [array]. Changes in the [Uint32] will be
-   * visible in the byte array and vice versa. If the [start] index of the
-   * region is not specified, it defaults to zero (the first byte in the byte
-   * array). If the length is not specified, it defaults to null, which
-   * indicates that the view extends to the end of the byte array.
-   *
-   * Throws [ArgumentError] if the length of the specified region
-   * is not divisible by 4 (the size of a "uint32" in bytes), or if the
-   * [start] of the region is not divisible by 4. If, however, [array]
-   * is a view of another byte array, this constructor will throw
-   * [ArgumentError] if the implicit starting position in the
-   * "ultimately backing" byte array is not divisible by 4. In plain terms,
-   * this constructor throws [ArgumentError] if the specified
-   * region does not contain an integral number of "uint32s," or if it
-   * is not "uint32-aligned."
-   */
-  external factory Uint32List.view(ByteArray array,
-                                   [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of 64-bit signed integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- */
-abstract class Int64List implements List<int>, ByteArrayViewable {
-  /**
-   * Creates an [Int64List] of the specified length (in elements), all of
-   * whose elements are initially zero.
-   */
-  external factory Int64List(int length);
-
-  /**
-   * Creates an [Int64List] _view_ of the specified region in the specified
-   * byte [array]. Changes in the [Int64List] will be visible in the byte
-   * array and vice versa. If the [start] index of the region is not specified,
-   * it defaults to zero (the first byte in the byte array). If the length is
-   * not specified, it defaults to null, which indicates that the view extends
-   * to the end of the byte array.
-   *
-   * Throws [ArgumentError] if the length of the specified region
-   * is not divisible by 8 (the size of an "int64" in bytes), or if the
-   * [start] of the region is not divisible by 8. If, however, [array]
-   * is a view of another byte array, this constructor will throw
-   * [ArgumentError] if the implicit starting position in the
-   * "ultimately backing" byte array is not divisible by 8. In plain terms,
-   * this constructor throws [ArgumentError] if the specified
-   * region does not contain an integral number of "int64s," or if it
-   * is not "int64-aligned."
-   */
-  external factory Int64List.view(ByteArray array, [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of 64-bit unsigned integers that is viewable as a
- * [ByteArray]. For long lists, this implementation will be considerably
- * more space- and time-efficient than the default [List] implementation.
- */
-abstract class Uint64List implements List<int>, ByteArrayViewable {
-  /**
-   * Creates a [Uint64List] of the specified length (in elements), all
-   * of whose elements are initially zero.
-   */
-  external factory Uint64List(int length);
-
-  /**
-   * Creates an [Uint64List] _view_ of the specified region in
-   * the specified byte [array]. Changes in the [Uint64List] will be
-   * visible in the byte array and vice versa. If the [start] index of the
-   * region is not specified, it defaults to zero (the first byte in the byte
-   * array). If the length is not specified, it defaults to null, which
-   * indicates that the view extends to the end of the byte array.
-   *
-   * Throws [ArgumentError] if the length of the specified region
-   * is not divisible by 8 (the size of a "uint64" in bytes), or if the
-   * [start] of the region is not divisible by 8. If, however, [array]
-   * is a view of another byte array, this constructor will throw
-   * [ArgumentError] if the implicit starting position in the
-   * "ultimately backing" byte array is not divisible by 8. In plain terms,
-   * this constructor throws [ArgumentError] if the specified
-   * region does not contain an integral number of "uint64s," or if it
-   * is not "uint64-aligned."
-   */
-  external factory Uint64List.view(ByteArray array,
-                                   [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of IEEE 754 single-precision binary floating-point
- * numbers  that is viewable as a [ByteArray]. For long lists, this
- * implementation will be considerably more space- and time-efficient than
- * the default [List] implementation.
- */
-abstract class Float32List implements List<double>, ByteArrayViewable {
-  /**
-   * Creates a [Float32List] of the specified length (in elements), all of
-   * whose elements are initially zero.
-   */
-  external factory Float32List(int length);
-
-  /**
-   * Creates a [Float32List] _view_ of the specified region in the specified
-   * byte [array]. Changes in the [Float32List] will be visible in the byte
-   * array and vice versa. If the [start] index of the region is not specified,
-   * it defaults to zero (the first byte in the byte array). If the length is
-   * not specified, it defaults to null, which indicates that the view extends
-   * to the end of the byte array.
-   *
-   * Throws [ArgumentError] if the length of the specified region
-   * is not divisible by 4 (the size of a "float32" in bytes), or if the
-   * [start] of the region is not divisible by 4. If, however, [array]
-   * is a view of another byte array, this constructor will throw
-   * [ArgumentError] if the implicit starting position in the
-   * "ultimately backing" byte array is not divisible by 4. In plain terms,
-   * this constructor throws [ArgumentError] if the specified
-   * region does not contain an integral number of "float32s," or if it
-   * is not "float32-aligned."
-   */
-  external factory Float32List.view(ByteArray array,
-                                    [int start = 0, int length]);
-}
-
-
-/**
- * A fixed-length list of IEEE 754 double-precision binary floating-point
- * numbers  that is viewable as a [ByteArray]. For long lists, this
- * implementation will be considerably more space- and time-efficient than
- * the default [List] implementation.
- */
-abstract class Float64List implements List<double>, ByteArrayViewable {
-  /**
-   * Creates a [Float64List] of the specified length (in elements), all of
-   * whose elements are initially zero.
-   */
-  external factory Float64List(int length);
-
-  /**
-   * Creates a [Float64List] _view_ of the specified region in the specified
-   * byte [array]. Changes in the [Float64List] will be visible in the byte
-   * array and vice versa. If the [start] index of the region is not specified,
-   * it defaults to zero (the first byte in the byte array). If the length is
-   * not specified, it defaults to null, which indicates that the view extends
-   * to the end of the byte array.
-   *
-   * Throws [ArgumentError] if the length of the specified region
-   * is not divisible by 8 (the size of a "float64" in bytes), or if the
-   * [start] of the region is not divisible by 8. If, however, [array]
-   * is a view of another byte array, this constructor will throw
-   * [ArgumentError] if the implicit starting position in the
-   * "ultimately backing" byte array is not divisible by 8. In plain terms,
-   * this constructor throws [ArgumentError] if the specified
-   * region does not contain an integral number of "float64s," or if it
-   * is not "float64-aligned."
-   */
-  external factory Float64List.view(ByteArray array,
-                                    [int start = 0, int length]);
-}