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// Copyright (c) 2019, 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.
library FfiTestCoordinateManual;
import 'dart:ffi' as ffi;
/// Sample struct for dart:ffi library without use of ffi annotations.
class Coordinate extends ffi.Pointer<ffi.Void> {
ffi.Pointer<ffi.Double> get _xPtr => cast();
set x(double v) =>;
double get x => _xPtr.load();
ffi.Pointer<ffi.Double> get _yPtr =>
offsetBy(ffi.sizeOf<ffi.Double>() * 1).cast();
set y(double v) =>;
double get y => _yPtr.load();
ffi.Pointer<Coordinate> get _nextPtr =>
offsetBy(ffi.sizeOf<ffi.Double>() * 2).cast();
set next(Coordinate v) =>;
Coordinate get next => _nextPtr.load();
static int sizeOf() =>
ffi.sizeOf<ffi.Double>() * 2 + ffi.sizeOf<ffi.IntPtr>();
Coordinate offsetBy(int offsetInBytes) =>
Coordinate elementAt(int index) => offsetBy(sizeOf() * index);
static Coordinate allocate({int count: 1}) =>
ffi.allocate<ffi.Uint8>(count: count * sizeOf()).cast();
/// Allocate a new [Coordinate] in C memory and populate its fields.
factory Coordinate(double x, double y, Coordinate next) {
Coordinate result = Coordinate.allocate()
..x = x
..y = y = next;
return result;