tests/ffi/function_structs_by_value_generated_ret_arg_test.dart

// Copyright (c) 2020, 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.
//
// This file has been automatically generated. Please do not edit it manually.
// Generated by tests/ffi/generator/structs_by_value_tests_generator.dart.
//
// SharedObjects=ffi_test_functions
// VMOptions=
// VMOptions=--deterministic --optimization-counter-threshold=90
// VMOptions=--use-slow-path
// VMOptions=--use-slow-path --stacktrace-every=100

import 'dart:ffi';

import 'package:expect/expect.dart';
// ignore: unused_import
import 'package:ffi/ffi.dart';

import 'dylib_utils.dart';

// Reuse the compound classes.
import 'function_structs_by_value_generated_compounds.dart';

final ffiTestFunctions = dlopenPlatformSpecific("ffi_test_functions");
void main() {
  for (int i = 0; i < 100; ++i) {
    testReturnStructArgumentStruct1ByteInt();
    testReturnStructArgumentInt32x8Struct1ByteInt();
    testReturnStructArgumentStruct8BytesHomogeneousFloat();
    testReturnStructArgumentStruct20BytesHomogeneousInt32();
    testReturnStructArgumentInt32x8Struct20BytesHomogeneou();
    testReturnStructArgumentStruct8BytesInlineArrayInt();
    testReturnStructArgumentStructStruct16BytesHomogeneous();
    testReturnStructArgumentStructStruct32BytesHomogeneous();
    testReturnStructArgumentStructStruct16BytesMixed3();
    testReturnStructAlignmentInt16();
    testReturnStructAlignmentInt32();
    testReturnStructAlignmentInt64();
    testReturnStruct8BytesNestedInt();
    testReturnStruct8BytesNestedFloat();
    testReturnStruct8BytesNestedFloat2();
    testReturnStruct8BytesNestedMixed();
    testReturnStruct16BytesNestedInt();
    testReturnStruct32BytesNestedInt();
    testReturnStructNestedIntStructAlignmentInt16();
    testReturnStructNestedIntStructAlignmentInt32();
    testReturnStructNestedIntStructAlignmentInt64();
    testReturnStructNestedIrregularEvenBigger();
  }
}

final returnStructArgumentStruct1ByteInt = ffiTestFunctions
    .lookupFunction<
      Struct1ByteInt Function(Struct1ByteInt),
      Struct1ByteInt Function(Struct1ByteInt)
    >("ReturnStructArgumentStruct1ByteInt");

/// Test that a struct passed in as argument can be returned.
/// Especially for ffi callbacks.
/// Struct is passed in int registers in most ABIs.
void testReturnStructArgumentStruct1ByteInt() {
  final a0Pointer = calloc<Struct1ByteInt>();
  final Struct1ByteInt a0 = a0Pointer.ref;

  a0.a0 = -1;

  final result = returnStructArgumentStruct1ByteInt(a0);

  print("result = $result");

  Expect.equals(a0.a0, result.a0);

  calloc.free(a0Pointer);
}

final returnStructArgumentInt32x8Struct1ByteInt = ffiTestFunctions
    .lookupFunction<
      Struct1ByteInt Function(
        Int32,
        Int32,
        Int32,
        Int32,
        Int32,
        Int32,
        Int32,
        Int32,
        Struct1ByteInt,
      ),
      Struct1ByteInt Function(
        int,
        int,
        int,
        int,
        int,
        int,
        int,
        int,
        Struct1ByteInt,
      )
    >("ReturnStructArgumentInt32x8Struct1ByteInt");

/// Test that a struct passed in as argument can be returned.
/// Especially for ffi callbacks.
/// Struct is passed on stack on all ABIs.
void testReturnStructArgumentInt32x8Struct1ByteInt() {
  int a0;
  int a1;
  int a2;
  int a3;
  int a4;
  int a5;
  int a6;
  int a7;
  final a8Pointer = calloc<Struct1ByteInt>();
  final Struct1ByteInt a8 = a8Pointer.ref;

  a0 = -1;
  a1 = 2;
  a2 = -3;
  a3 = 4;
  a4 = -5;
  a5 = 6;
  a6 = -7;
  a7 = 8;
  a8.a0 = -9;

  final result = returnStructArgumentInt32x8Struct1ByteInt(
    a0,
    a1,
    a2,
    a3,
    a4,
    a5,
    a6,
    a7,
    a8,
  );

  print("result = $result");

  Expect.equals(a8.a0, result.a0);

  calloc.free(a8Pointer);
}

final returnStructArgumentStruct8BytesHomogeneousFloat = ffiTestFunctions
    .lookupFunction<
      Struct8BytesHomogeneousFloat Function(Struct8BytesHomogeneousFloat),
      Struct8BytesHomogeneousFloat Function(Struct8BytesHomogeneousFloat)
    >("ReturnStructArgumentStruct8BytesHomogeneousFloat");

/// Test that a struct passed in as argument can be returned.
/// Especially for ffi callbacks.
/// Struct is passed in float registers in most ABIs.
void testReturnStructArgumentStruct8BytesHomogeneousFloat() {
  final a0Pointer = calloc<Struct8BytesHomogeneousFloat>();
  final Struct8BytesHomogeneousFloat a0 = a0Pointer.ref;

  a0.a0 = -1.0;
  a0.a1 = 2.0;

  final result = returnStructArgumentStruct8BytesHomogeneousFloat(a0);

  print("result = $result");

  Expect.approxEquals(a0.a0, result.a0);
  Expect.approxEquals(a0.a1, result.a1);

  calloc.free(a0Pointer);
}

final returnStructArgumentStruct20BytesHomogeneousInt32 = ffiTestFunctions
    .lookupFunction<
      Struct20BytesHomogeneousInt32 Function(Struct20BytesHomogeneousInt32),
      Struct20BytesHomogeneousInt32 Function(Struct20BytesHomogeneousInt32)
    >("ReturnStructArgumentStruct20BytesHomogeneousInt32");

/// On arm64, both argument and return value are passed in by pointer.
void testReturnStructArgumentStruct20BytesHomogeneousInt32() {
  final a0Pointer = calloc<Struct20BytesHomogeneousInt32>();
  final Struct20BytesHomogeneousInt32 a0 = a0Pointer.ref;

  a0.a0 = -1;
  a0.a1 = 2;
  a0.a2 = -3;
  a0.a3 = 4;
  a0.a4 = -5;

  final result = returnStructArgumentStruct20BytesHomogeneousInt32(a0);

  print("result = $result");

  Expect.equals(a0.a0, result.a0);
  Expect.equals(a0.a1, result.a1);
  Expect.equals(a0.a2, result.a2);
  Expect.equals(a0.a3, result.a3);
  Expect.equals(a0.a4, result.a4);

  calloc.free(a0Pointer);
}

final returnStructArgumentInt32x8Struct20BytesHomogeneou = ffiTestFunctions
    .lookupFunction<
      Struct20BytesHomogeneousInt32 Function(
        Int32,
        Int32,
        Int32,
        Int32,
        Int32,
        Int32,
        Int32,
        Int32,
        Struct20BytesHomogeneousInt32,
      ),
      Struct20BytesHomogeneousInt32 Function(
        int,
        int,
        int,
        int,
        int,
        int,
        int,
        int,
        Struct20BytesHomogeneousInt32,
      )
    >("ReturnStructArgumentInt32x8Struct20BytesHomogeneou");

/// On arm64, both argument and return value are passed in by pointer.
/// Ints exhaust registers, so that pointer is passed on stack.
void testReturnStructArgumentInt32x8Struct20BytesHomogeneou() {
  int a0;
  int a1;
  int a2;
  int a3;
  int a4;
  int a5;
  int a6;
  int a7;
  final a8Pointer = calloc<Struct20BytesHomogeneousInt32>();
  final Struct20BytesHomogeneousInt32 a8 = a8Pointer.ref;

  a0 = -1;
  a1 = 2;
  a2 = -3;
  a3 = 4;
  a4 = -5;
  a5 = 6;
  a6 = -7;
  a7 = 8;
  a8.a0 = -9;
  a8.a1 = 10;
  a8.a2 = -11;
  a8.a3 = 12;
  a8.a4 = -13;

  final result = returnStructArgumentInt32x8Struct20BytesHomogeneou(
    a0,
    a1,
    a2,
    a3,
    a4,
    a5,
    a6,
    a7,
    a8,
  );

  print("result = $result");

  Expect.equals(a8.a0, result.a0);
  Expect.equals(a8.a1, result.a1);
  Expect.equals(a8.a2, result.a2);
  Expect.equals(a8.a3, result.a3);
  Expect.equals(a8.a4, result.a4);

  calloc.free(a8Pointer);
}

final returnStructArgumentStruct8BytesInlineArrayInt = ffiTestFunctions
    .lookupFunction<
      Struct8BytesInlineArrayInt Function(Struct8BytesInlineArrayInt),
      Struct8BytesInlineArrayInt Function(Struct8BytesInlineArrayInt)
    >("ReturnStructArgumentStruct8BytesInlineArrayInt");

/// Test returning struct with inline array.
void testReturnStructArgumentStruct8BytesInlineArrayInt() {
  final a0Pointer = calloc<Struct8BytesInlineArrayInt>();
  final Struct8BytesInlineArrayInt a0 = a0Pointer.ref;

  a0.a0[0] = 1;
  a0.a0[1] = 2;
  a0.a0[2] = 3;
  a0.a0[3] = 4;
  a0.a0[4] = 5;
  a0.a0[5] = 6;
  a0.a0[6] = 7;
  a0.a0[7] = 8;

  final result = returnStructArgumentStruct8BytesInlineArrayInt(a0);

  print("result = $result");

  for (int i = 0; i < 8; i++) {
    Expect.equals(a0.a0[i], result.a0[i]);
  }

  calloc.free(a0Pointer);
}

final returnStructArgumentStructStruct16BytesHomogeneous = ffiTestFunctions
    .lookupFunction<
      StructStruct16BytesHomogeneousFloat2 Function(
        StructStruct16BytesHomogeneousFloat2,
      ),
      StructStruct16BytesHomogeneousFloat2 Function(
        StructStruct16BytesHomogeneousFloat2,
      )
    >("ReturnStructArgumentStructStruct16BytesHomogeneous");

/// Return value in FPU registers on arm hardfp and arm64.
void testReturnStructArgumentStructStruct16BytesHomogeneous() {
  final a0Pointer = calloc<StructStruct16BytesHomogeneousFloat2>();
  final StructStruct16BytesHomogeneousFloat2 a0 = a0Pointer.ref;

  a0.a0.a0 = -1.0;
  a0.a1[0].a0 = 2.0;
  a0.a1[1].a0 = -3.0;
  a0.a2 = 4.0;

  final result = returnStructArgumentStructStruct16BytesHomogeneous(a0);

  print("result = $result");

  Expect.approxEquals(a0.a0.a0, result.a0.a0);
  for (int i = 0; i < 2; i++) {
    Expect.approxEquals(a0.a1[i].a0, result.a1[i].a0);
  }
  Expect.approxEquals(a0.a2, result.a2);

  calloc.free(a0Pointer);
}

final returnStructArgumentStructStruct32BytesHomogeneous = ffiTestFunctions
    .lookupFunction<
      StructStruct32BytesHomogeneousDouble2 Function(
        StructStruct32BytesHomogeneousDouble2,
      ),
      StructStruct32BytesHomogeneousDouble2 Function(
        StructStruct32BytesHomogeneousDouble2,
      )
    >("ReturnStructArgumentStructStruct32BytesHomogeneous");

/// Return value in FPU registers on arm64.
void testReturnStructArgumentStructStruct32BytesHomogeneous() {
  final a0Pointer = calloc<StructStruct32BytesHomogeneousDouble2>();
  final StructStruct32BytesHomogeneousDouble2 a0 = a0Pointer.ref;

  a0.a0.a0 = -1.0;
  a0.a1[0].a0 = 2.0;
  a0.a1[1].a0 = -3.0;
  a0.a2 = 4.0;

  final result = returnStructArgumentStructStruct32BytesHomogeneous(a0);

  print("result = $result");

  Expect.approxEquals(a0.a0.a0, result.a0.a0);
  for (int i = 0; i < 2; i++) {
    Expect.approxEquals(a0.a1[i].a0, result.a1[i].a0);
  }
  Expect.approxEquals(a0.a2, result.a2);

  calloc.free(a0Pointer);
}

final returnStructArgumentStructStruct16BytesMixed3 = ffiTestFunctions
    .lookupFunction<
      StructStruct16BytesMixed3 Function(StructStruct16BytesMixed3),
      StructStruct16BytesMixed3 Function(StructStruct16BytesMixed3)
    >("ReturnStructArgumentStructStruct16BytesMixed3");

/// On x64 Linux, return value is split over FP and int registers.
void testReturnStructArgumentStructStruct16BytesMixed3() {
  final a0Pointer = calloc<StructStruct16BytesMixed3>();
  final StructStruct16BytesMixed3 a0 = a0Pointer.ref;

  a0.a0.a0 = -1.0;
  a0.a1[0].a0 = 2.0;
  a0.a1[0].a1 = -3;
  a0.a1[0].a2 = 4;
  a0.a2[0] = -5;
  a0.a2[1] = 6;

  final result = returnStructArgumentStructStruct16BytesMixed3(a0);

  print("result = $result");

  Expect.approxEquals(a0.a0.a0, result.a0.a0);
  for (int i = 0; i < 1; i++) {
    Expect.approxEquals(a0.a1[i].a0, result.a1[i].a0);
    Expect.equals(a0.a1[i].a1, result.a1[i].a1);
    Expect.equals(a0.a1[i].a2, result.a1[i].a2);
  }
  for (int i = 0; i < 2; i++) {
    Expect.equals(a0.a2[i], result.a2[i]);
  }

  calloc.free(a0Pointer);
}

final returnStructAlignmentInt16 = ffiTestFunctions
    .lookupFunction<
      StructAlignmentInt16 Function(Int8, Int16, Int8),
      StructAlignmentInt16 Function(int, int, int)
    >("ReturnStructAlignmentInt16");

/// Test alignment and padding of 16 byte int within struct.
void testReturnStructAlignmentInt16() {
  int a0;
  int a1;
  int a2;

  a0 = -1;
  a1 = 2;
  a2 = -3;

  final result = returnStructAlignmentInt16(a0, a1, a2);

  print("result = $result");

  Expect.equals(a0, result.a0);
  Expect.equals(a1, result.a1);
  Expect.equals(a2, result.a2);
}

final returnStructAlignmentInt32 = ffiTestFunctions
    .lookupFunction<
      StructAlignmentInt32 Function(Int8, Int32, Int8),
      StructAlignmentInt32 Function(int, int, int)
    >("ReturnStructAlignmentInt32");

/// Test alignment and padding of 32 byte int within struct.
void testReturnStructAlignmentInt32() {
  int a0;
  int a1;
  int a2;

  a0 = -1;
  a1 = 2;
  a2 = -3;

  final result = returnStructAlignmentInt32(a0, a1, a2);

  print("result = $result");

  Expect.equals(a0, result.a0);
  Expect.equals(a1, result.a1);
  Expect.equals(a2, result.a2);
}

final returnStructAlignmentInt64 = ffiTestFunctions
    .lookupFunction<
      StructAlignmentInt64 Function(Int8, Int64, Int8),
      StructAlignmentInt64 Function(int, int, int)
    >("ReturnStructAlignmentInt64");

/// Test alignment and padding of 64 byte int within struct.
void testReturnStructAlignmentInt64() {
  int a0;
  int a1;
  int a2;

  a0 = -1;
  a1 = 2;
  a2 = -3;

  final result = returnStructAlignmentInt64(a0, a1, a2);

  print("result = $result");

  Expect.equals(a0, result.a0);
  Expect.equals(a1, result.a1);
  Expect.equals(a2, result.a2);
}

final returnStruct8BytesNestedInt = ffiTestFunctions
    .lookupFunction<
      Struct8BytesNestedInt Function(
        Struct4BytesHomogeneousInt16,
        Struct4BytesHomogeneousInt16,
      ),
      Struct8BytesNestedInt Function(
        Struct4BytesHomogeneousInt16,
        Struct4BytesHomogeneousInt16,
      )
    >("ReturnStruct8BytesNestedInt");

/// Simple nested struct.
void testReturnStruct8BytesNestedInt() {
  final a0Pointer = calloc<Struct4BytesHomogeneousInt16>();
  final Struct4BytesHomogeneousInt16 a0 = a0Pointer.ref;
  final a1Pointer = calloc<Struct4BytesHomogeneousInt16>();
  final Struct4BytesHomogeneousInt16 a1 = a1Pointer.ref;

  a0.a0 = -1;
  a0.a1 = 2;
  a1.a0 = -3;
  a1.a1 = 4;

  final result = returnStruct8BytesNestedInt(a0, a1);

  print("result = $result");

  Expect.equals(a0.a0, result.a0.a0);
  Expect.equals(a0.a1, result.a0.a1);
  Expect.equals(a1.a0, result.a1.a0);
  Expect.equals(a1.a1, result.a1.a1);

  calloc.free(a0Pointer);
  calloc.free(a1Pointer);
}

final returnStruct8BytesNestedFloat = ffiTestFunctions
    .lookupFunction<
      Struct8BytesNestedFloat Function(Struct4BytesFloat, Struct4BytesFloat),
      Struct8BytesNestedFloat Function(Struct4BytesFloat, Struct4BytesFloat)
    >("ReturnStruct8BytesNestedFloat");

/// Simple nested struct with floats.
void testReturnStruct8BytesNestedFloat() {
  final a0Pointer = calloc<Struct4BytesFloat>();
  final Struct4BytesFloat a0 = a0Pointer.ref;
  final a1Pointer = calloc<Struct4BytesFloat>();
  final Struct4BytesFloat a1 = a1Pointer.ref;

  a0.a0 = -1.0;
  a1.a0 = 2.0;

  final result = returnStruct8BytesNestedFloat(a0, a1);

  print("result = $result");

  Expect.approxEquals(a0.a0, result.a0.a0);
  Expect.approxEquals(a1.a0, result.a1.a0);

  calloc.free(a0Pointer);
  calloc.free(a1Pointer);
}

final returnStruct8BytesNestedFloat2 = ffiTestFunctions
    .lookupFunction<
      Struct8BytesNestedFloat2 Function(Struct4BytesFloat, Float),
      Struct8BytesNestedFloat2 Function(Struct4BytesFloat, double)
    >("ReturnStruct8BytesNestedFloat2");

/// The nesting is irregular, testing homogenous float rules on arm and arm64,
/// and the fpu register usage on x64.
void testReturnStruct8BytesNestedFloat2() {
  final a0Pointer = calloc<Struct4BytesFloat>();
  final Struct4BytesFloat a0 = a0Pointer.ref;
  double a1;

  a0.a0 = -1.0;
  a1 = 2.0;

  final result = returnStruct8BytesNestedFloat2(a0, a1);

  print("result = $result");

  Expect.approxEquals(a0.a0, result.a0.a0);
  Expect.approxEquals(a1, result.a1);

  calloc.free(a0Pointer);
}

final returnStruct8BytesNestedMixed = ffiTestFunctions
    .lookupFunction<
      Struct8BytesNestedMixed Function(
        Struct4BytesHomogeneousInt16,
        Struct4BytesFloat,
      ),
      Struct8BytesNestedMixed Function(
        Struct4BytesHomogeneousInt16,
        Struct4BytesFloat,
      )
    >("ReturnStruct8BytesNestedMixed");

/// Simple nested struct with mixed members.
void testReturnStruct8BytesNestedMixed() {
  final a0Pointer = calloc<Struct4BytesHomogeneousInt16>();
  final Struct4BytesHomogeneousInt16 a0 = a0Pointer.ref;
  final a1Pointer = calloc<Struct4BytesFloat>();
  final Struct4BytesFloat a1 = a1Pointer.ref;

  a0.a0 = -1;
  a0.a1 = 2;
  a1.a0 = -3.0;

  final result = returnStruct8BytesNestedMixed(a0, a1);

  print("result = $result");

  Expect.equals(a0.a0, result.a0.a0);
  Expect.equals(a0.a1, result.a0.a1);
  Expect.approxEquals(a1.a0, result.a1.a0);

  calloc.free(a0Pointer);
  calloc.free(a1Pointer);
}

final returnStruct16BytesNestedInt = ffiTestFunctions
    .lookupFunction<
      Struct16BytesNestedInt Function(
        Struct8BytesNestedInt,
        Struct8BytesNestedInt,
      ),
      Struct16BytesNestedInt Function(
        Struct8BytesNestedInt,
        Struct8BytesNestedInt,
      )
    >("ReturnStruct16BytesNestedInt");

/// Deeper nested struct to test recursive member access.
void testReturnStruct16BytesNestedInt() {
  final a0Pointer = calloc<Struct8BytesNestedInt>();
  final Struct8BytesNestedInt a0 = a0Pointer.ref;
  final a1Pointer = calloc<Struct8BytesNestedInt>();
  final Struct8BytesNestedInt a1 = a1Pointer.ref;

  a0.a0.a0 = -1;
  a0.a0.a1 = 2;
  a0.a1.a0 = -3;
  a0.a1.a1 = 4;
  a1.a0.a0 = -5;
  a1.a0.a1 = 6;
  a1.a1.a0 = -7;
  a1.a1.a1 = 8;

  final result = returnStruct16BytesNestedInt(a0, a1);

  print("result = $result");

  Expect.equals(a0.a0.a0, result.a0.a0.a0);
  Expect.equals(a0.a0.a1, result.a0.a0.a1);
  Expect.equals(a0.a1.a0, result.a0.a1.a0);
  Expect.equals(a0.a1.a1, result.a0.a1.a1);
  Expect.equals(a1.a0.a0, result.a1.a0.a0);
  Expect.equals(a1.a0.a1, result.a1.a0.a1);
  Expect.equals(a1.a1.a0, result.a1.a1.a0);
  Expect.equals(a1.a1.a1, result.a1.a1.a1);

  calloc.free(a0Pointer);
  calloc.free(a1Pointer);
}

final returnStruct32BytesNestedInt = ffiTestFunctions
    .lookupFunction<
      Struct32BytesNestedInt Function(
        Struct16BytesNestedInt,
        Struct16BytesNestedInt,
      ),
      Struct32BytesNestedInt Function(
        Struct16BytesNestedInt,
        Struct16BytesNestedInt,
      )
    >("ReturnStruct32BytesNestedInt");

/// Even deeper nested struct to test recursive member access.
void testReturnStruct32BytesNestedInt() {
  final a0Pointer = calloc<Struct16BytesNestedInt>();
  final Struct16BytesNestedInt a0 = a0Pointer.ref;
  final a1Pointer = calloc<Struct16BytesNestedInt>();
  final Struct16BytesNestedInt a1 = a1Pointer.ref;

  a0.a0.a0.a0 = -1;
  a0.a0.a0.a1 = 2;
  a0.a0.a1.a0 = -3;
  a0.a0.a1.a1 = 4;
  a0.a1.a0.a0 = -5;
  a0.a1.a0.a1 = 6;
  a0.a1.a1.a0 = -7;
  a0.a1.a1.a1 = 8;
  a1.a0.a0.a0 = -9;
  a1.a0.a0.a1 = 10;
  a1.a0.a1.a0 = -11;
  a1.a0.a1.a1 = 12;
  a1.a1.a0.a0 = -13;
  a1.a1.a0.a1 = 14;
  a1.a1.a1.a0 = -15;
  a1.a1.a1.a1 = 16;

  final result = returnStruct32BytesNestedInt(a0, a1);

  print("result = $result");

  Expect.equals(a0.a0.a0.a0, result.a0.a0.a0.a0);
  Expect.equals(a0.a0.a0.a1, result.a0.a0.a0.a1);
  Expect.equals(a0.a0.a1.a0, result.a0.a0.a1.a0);
  Expect.equals(a0.a0.a1.a1, result.a0.a0.a1.a1);
  Expect.equals(a0.a1.a0.a0, result.a0.a1.a0.a0);
  Expect.equals(a0.a1.a0.a1, result.a0.a1.a0.a1);
  Expect.equals(a0.a1.a1.a0, result.a0.a1.a1.a0);
  Expect.equals(a0.a1.a1.a1, result.a0.a1.a1.a1);
  Expect.equals(a1.a0.a0.a0, result.a1.a0.a0.a0);
  Expect.equals(a1.a0.a0.a1, result.a1.a0.a0.a1);
  Expect.equals(a1.a0.a1.a0, result.a1.a0.a1.a0);
  Expect.equals(a1.a0.a1.a1, result.a1.a0.a1.a1);
  Expect.equals(a1.a1.a0.a0, result.a1.a1.a0.a0);
  Expect.equals(a1.a1.a0.a1, result.a1.a1.a0.a1);
  Expect.equals(a1.a1.a1.a0, result.a1.a1.a1.a0);
  Expect.equals(a1.a1.a1.a1, result.a1.a1.a1.a1);

  calloc.free(a0Pointer);
  calloc.free(a1Pointer);
}

final returnStructNestedIntStructAlignmentInt16 = ffiTestFunctions
    .lookupFunction<
      StructNestedIntStructAlignmentInt16 Function(
        StructAlignmentInt16,
        StructAlignmentInt16,
      ),
      StructNestedIntStructAlignmentInt16 Function(
        StructAlignmentInt16,
        StructAlignmentInt16,
      )
    >("ReturnStructNestedIntStructAlignmentInt16");

/// Test alignment and padding of nested struct with 16 byte int.
void testReturnStructNestedIntStructAlignmentInt16() {
  final a0Pointer = calloc<StructAlignmentInt16>();
  final StructAlignmentInt16 a0 = a0Pointer.ref;
  final a1Pointer = calloc<StructAlignmentInt16>();
  final StructAlignmentInt16 a1 = a1Pointer.ref;

  a0.a0 = -1;
  a0.a1 = 2;
  a0.a2 = -3;
  a1.a0 = 4;
  a1.a1 = -5;
  a1.a2 = 6;

  final result = returnStructNestedIntStructAlignmentInt16(a0, a1);

  print("result = $result");

  Expect.equals(a0.a0, result.a0.a0);
  Expect.equals(a0.a1, result.a0.a1);
  Expect.equals(a0.a2, result.a0.a2);
  Expect.equals(a1.a0, result.a1.a0);
  Expect.equals(a1.a1, result.a1.a1);
  Expect.equals(a1.a2, result.a1.a2);

  calloc.free(a0Pointer);
  calloc.free(a1Pointer);
}

final returnStructNestedIntStructAlignmentInt32 = ffiTestFunctions
    .lookupFunction<
      StructNestedIntStructAlignmentInt32 Function(
        StructAlignmentInt32,
        StructAlignmentInt32,
      ),
      StructNestedIntStructAlignmentInt32 Function(
        StructAlignmentInt32,
        StructAlignmentInt32,
      )
    >("ReturnStructNestedIntStructAlignmentInt32");

/// Test alignment and padding of nested struct with 32 byte int.
void testReturnStructNestedIntStructAlignmentInt32() {
  final a0Pointer = calloc<StructAlignmentInt32>();
  final StructAlignmentInt32 a0 = a0Pointer.ref;
  final a1Pointer = calloc<StructAlignmentInt32>();
  final StructAlignmentInt32 a1 = a1Pointer.ref;

  a0.a0 = -1;
  a0.a1 = 2;
  a0.a2 = -3;
  a1.a0 = 4;
  a1.a1 = -5;
  a1.a2 = 6;

  final result = returnStructNestedIntStructAlignmentInt32(a0, a1);

  print("result = $result");

  Expect.equals(a0.a0, result.a0.a0);
  Expect.equals(a0.a1, result.a0.a1);
  Expect.equals(a0.a2, result.a0.a2);
  Expect.equals(a1.a0, result.a1.a0);
  Expect.equals(a1.a1, result.a1.a1);
  Expect.equals(a1.a2, result.a1.a2);

  calloc.free(a0Pointer);
  calloc.free(a1Pointer);
}

final returnStructNestedIntStructAlignmentInt64 = ffiTestFunctions
    .lookupFunction<
      StructNestedIntStructAlignmentInt64 Function(
        StructAlignmentInt64,
        StructAlignmentInt64,
      ),
      StructNestedIntStructAlignmentInt64 Function(
        StructAlignmentInt64,
        StructAlignmentInt64,
      )
    >("ReturnStructNestedIntStructAlignmentInt64");

/// Test alignment and padding of nested struct with 64 byte int.
void testReturnStructNestedIntStructAlignmentInt64() {
  final a0Pointer = calloc<StructAlignmentInt64>();
  final StructAlignmentInt64 a0 = a0Pointer.ref;
  final a1Pointer = calloc<StructAlignmentInt64>();
  final StructAlignmentInt64 a1 = a1Pointer.ref;

  a0.a0 = -1;
  a0.a1 = 2;
  a0.a2 = -3;
  a1.a0 = 4;
  a1.a1 = -5;
  a1.a2 = 6;

  final result = returnStructNestedIntStructAlignmentInt64(a0, a1);

  print("result = $result");

  Expect.equals(a0.a0, result.a0.a0);
  Expect.equals(a0.a1, result.a0.a1);
  Expect.equals(a0.a2, result.a0.a2);
  Expect.equals(a1.a0, result.a1.a0);
  Expect.equals(a1.a1, result.a1.a1);
  Expect.equals(a1.a2, result.a1.a2);

  calloc.free(a0Pointer);
  calloc.free(a1Pointer);
}

final returnStructNestedIrregularEvenBigger = ffiTestFunctions
    .lookupFunction<
      StructNestedIrregularEvenBigger Function(
        Uint64,
        StructNestedIrregularBigger,
        StructNestedIrregularBigger,
        Double,
      ),
      StructNestedIrregularEvenBigger Function(
        int,
        StructNestedIrregularBigger,
        StructNestedIrregularBigger,
        double,
      )
    >("ReturnStructNestedIrregularEvenBigger");

/// Return big irregular struct as smoke test.
void testReturnStructNestedIrregularEvenBigger() {
  int a0;
  final a1Pointer = calloc<StructNestedIrregularBigger>();
  final StructNestedIrregularBigger a1 = a1Pointer.ref;
  final a2Pointer = calloc<StructNestedIrregularBigger>();
  final StructNestedIrregularBigger a2 = a2Pointer.ref;
  double a3;

  a0 = 1;
  a1.a0.a0 = 2;
  a1.a0.a1.a0.a0 = -3;
  a1.a0.a1.a0.a1 = 4;
  a1.a0.a1.a1.a0 = -5.0;
  a1.a0.a2 = 6;
  a1.a0.a3.a0.a0 = -7.0;
  a1.a0.a3.a1 = 8.0;
  a1.a0.a4 = 9;
  a1.a0.a5.a0.a0 = 10.0;
  a1.a0.a5.a1.a0 = -11.0;
  a1.a0.a6 = 12;
  a1.a1.a0.a0 = -13;
  a1.a1.a0.a1 = 14;
  a1.a1.a1.a0 = -15.0;
  a1.a2 = 16.0;
  a1.a3 = -17.0;
  a2.a0.a0 = 18;
  a2.a0.a1.a0.a0 = -19;
  a2.a0.a1.a0.a1 = 20;
  a2.a0.a1.a1.a0 = -21.0;
  a2.a0.a2 = 22;
  a2.a0.a3.a0.a0 = -23.0;
  a2.a0.a3.a1 = 24.0;
  a2.a0.a4 = 25;
  a2.a0.a5.a0.a0 = 26.0;
  a2.a0.a5.a1.a0 = -27.0;
  a2.a0.a6 = 28;
  a2.a1.a0.a0 = -29;
  a2.a1.a0.a1 = 30;
  a2.a1.a1.a0 = -31.0;
  a2.a2 = 32.0;
  a2.a3 = -33.0;
  a3 = 34.0;

  final result = returnStructNestedIrregularEvenBigger(a0, a1, a2, a3);

  print("result = $result");

  Expect.equals(a0, result.a0);
  Expect.equals(a1.a0.a0, result.a1.a0.a0);
  Expect.equals(a1.a0.a1.a0.a0, result.a1.a0.a1.a0.a0);
  Expect.equals(a1.a0.a1.a0.a1, result.a1.a0.a1.a0.a1);
  Expect.approxEquals(a1.a0.a1.a1.a0, result.a1.a0.a1.a1.a0);
  Expect.equals(a1.a0.a2, result.a1.a0.a2);
  Expect.approxEquals(a1.a0.a3.a0.a0, result.a1.a0.a3.a0.a0);
  Expect.approxEquals(a1.a0.a3.a1, result.a1.a0.a3.a1);
  Expect.equals(a1.a0.a4, result.a1.a0.a4);
  Expect.approxEquals(a1.a0.a5.a0.a0, result.a1.a0.a5.a0.a0);
  Expect.approxEquals(a1.a0.a5.a1.a0, result.a1.a0.a5.a1.a0);
  Expect.equals(a1.a0.a6, result.a1.a0.a6);
  Expect.equals(a1.a1.a0.a0, result.a1.a1.a0.a0);
  Expect.equals(a1.a1.a0.a1, result.a1.a1.a0.a1);
  Expect.approxEquals(a1.a1.a1.a0, result.a1.a1.a1.a0);
  Expect.approxEquals(a1.a2, result.a1.a2);
  Expect.approxEquals(a1.a3, result.a1.a3);
  Expect.equals(a2.a0.a0, result.a2.a0.a0);
  Expect.equals(a2.a0.a1.a0.a0, result.a2.a0.a1.a0.a0);
  Expect.equals(a2.a0.a1.a0.a1, result.a2.a0.a1.a0.a1);
  Expect.approxEquals(a2.a0.a1.a1.a0, result.a2.a0.a1.a1.a0);
  Expect.equals(a2.a0.a2, result.a2.a0.a2);
  Expect.approxEquals(a2.a0.a3.a0.a0, result.a2.a0.a3.a0.a0);
  Expect.approxEquals(a2.a0.a3.a1, result.a2.a0.a3.a1);
  Expect.equals(a2.a0.a4, result.a2.a0.a4);
  Expect.approxEquals(a2.a0.a5.a0.a0, result.a2.a0.a5.a0.a0);
  Expect.approxEquals(a2.a0.a5.a1.a0, result.a2.a0.a5.a1.a0);
  Expect.equals(a2.a0.a6, result.a2.a0.a6);
  Expect.equals(a2.a1.a0.a0, result.a2.a1.a0.a0);
  Expect.equals(a2.a1.a0.a1, result.a2.a1.a0.a1);
  Expect.approxEquals(a2.a1.a1.a0, result.a2.a1.a1.a0);
  Expect.approxEquals(a2.a2, result.a2.a2);
  Expect.approxEquals(a2.a3, result.a2.a3);
  Expect.approxEquals(a3, result.a3);

  calloc.free(a1Pointer);
  calloc.free(a2Pointer);
}