LibTest/ffi/Array/Array_A01_t02.dart

// Copyright (c) 2021, 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
/// const Array<T extends NativeType>(
/// int dimension1,
///  [int dimension2,
///  int dimension3,
///  int dimension4,
///  int dimension5]
///  )
///  Const constructor to specify Array dimensions in Structs.
///
///  class MyStruct extends Struct {
///  @Array(8)
///  external Array<Uint8> inlineArray;
///
///  @Array(2, 2, 2)
///  external Array<Array<Array<Uint8>>> threeDimensionalInlineArray;
///  }
///  Do not invoke in normal code.
///
/// @description Checks that this class controls array boundaries
/// @author sgrekhov@unipro.ru

import "dart:ffi";
import "package:ffi/ffi.dart";
import "../../../Utils/expect.dart";

class MyStruct extends Struct {
  @Array(8)
  external Array<Uint8> a0;
}

void main() {
  final pointer = calloc<MyStruct>();
  try {
    final array = pointer.ref.a0;

    for (int i = 0; i < 8; i++) {
      array[i] = i + 1;
      Expect.equals(i + 1, array[i]);
    }
    Expect.throws(() {
      array[-1];
    });
    Expect.throws(() {
      array[8];
    });
  } finally {
    calloc.free(pointer);
  }
}