// Copyright (c) 2017, 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.

/// @assertion Float64x2List asFloat64x2List([int offsetInBytes = 0, int length])
/// Creates a Float64x2List view of a region of this byte buffer.
/// ...
/// The start index and length must describe a valid 128-bit aligned range of
/// the buffer:
///  - offsetInBytes must not be negative,
///  - offsetInBytes must be divisible by sixteen,
///  - length must not be negative, and
///  - offsetInBytes + length * 16 must not be greater than lengthInBytes.
/// @description Checks that creating Float64x2List view with negative offset,
/// with offset not divisible by sixteen, with negative length, or with
/// 'offsetInBytes + length * 16' greater then buffer length causes throwing
/// error at runtime.
/// @author ngl@unipro.ru


import "dart:typed_data";
import "../../../Utils/expect.dart";

void check(ByteBuffer buffer) {
  int bufSizeInBytes =buffer.lengthInBytes;
  int shift = (Float64x2List.bytesPerElement == 16) ? 4 : 0;
  // creates Float64x2List view with negative offset
  Expect.throws(() {
    buffer.asFloat64x2List(-1);
  });
  // creates Float64x2List view with offset not divisible by sixteen
  Expect.throws(() {
    buffer.asFloat64x2List(1);
  });
  // creates Float64x2List view with negative length
  Expect.throws(() {
    buffer.asFloat64x2List(0, -8);
  });
  // creates Float64x2List view with 'offsetInBytes + length * 16' greater then
  // buffer length
  Expect.throws(() {
    buffer.asFloat64x2List(16,  bufSizeInBytes >> shift);
  });
}

main() {
  var list2 = new List.filled(32, 0);
  var list4 = new Int32x4List(6);

  check((new Int8List.fromList(list2)).buffer);
  check((new Int16List.fromList(list2)).buffer);
  check((new Int32List.fromList(list2)).buffer);
  if (!isJS) {
    check((new Int64List.fromList(list2)).buffer);
  }
  check((new Int32x4List.fromList(list4)).buffer);
}