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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. // @dart = 2.9 import 'dart:ffi'; import 'package:ffi/ffi.dart'; import 'calloc.dart'; import 'coordinate.dart'; import 'dylib_utils.dart'; typedef NativeCoordinateOp = Pointer Function(Pointer); main() { print('start main'); DynamicLibrary ffiTestFunctions = dlopenPlatformSpecific("ffi_test_functions"); { // Pass a struct to a c function and get a struct as return value. Pointer> p1 = ffiTestFunctions.lookup("TransposeCoordinate"); NativeCoordinateOp f1 = p1.asFunction(); final c1 = calloc() ..ref.x = 10.0 ..ref.y = 20.0; final c2 = calloc() ..ref.x = 42.0 ..ref.y = 84.0 ..ref.next = c1; c1.ref.next = c2; Coordinate result = f1(c1).ref; print(c1.ref.x); print(c1.ref.y); print(result.runtimeType); print(result.x); print(result.y); } { // Pass an array of structs to a c funtion. Pointer> p1 = ffiTestFunctions.lookup("CoordinateElemAt1"); NativeCoordinateOp f1 = p1.asFunction(); Pointer c1 = calloc(3); Pointer c2 = c1.elementAt(1); Pointer c3 = c1.elementAt(2); c1.ref.x = 10.0; c1.ref.y = 10.0; c1.ref.next = c3; c2.ref.x = 20.0; c2.ref.y = 20.0; c2.ref.next = c1; c3.ref.x = 30.0; c3.ref.y = 30.0; c3.ref.next = c2; Coordinate result = f1(c1).ref; print(result.x); print(result.y); } print("end main"); }