[K/N] Migrate some cinterop tests to new test infra

native/native.tests/testData/CInterop/executable/funptr/funptr.def

@@ -0,0 +1,94 @@
+headerFilter = NOTHING
+---
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef int (*atoiPtrType)(const char*);
+
+static atoiPtrType getAtoiPtr() {
+    return &atoi;
+}
+
+static void __printInt(int x) {
+    printf("%d\n", x);
+}
+
+static void* __getPrintIntPtr() {
+    return &__printInt;
+}
+
+typedef void* (*getPrintIntPtrPtrType)(void);
+
+static getPrintIntPtrPtrType getGetPrintIntPtrPtr() {
+    return &__getPrintIntPtr;
+}
+
+static double __add(double x, double y) {
+    return x + y;
+}
+
+typedef double (*addPtrType)(double, double);
+
+static addPtrType getAddPtr() {
+    return &__add;
+}
+
+static int __doubleToInt(double x) {
+    return (int) x;
+}
+
+typedef int (*doubleToIntPtrType)(double);
+
+static doubleToIntPtrType getDoubleToIntPtr() {
+    return &__doubleToInt;
+}
+
+static _Bool __isIntPositive(int x) {
+    return x > 0;
+}
+
+typedef _Bool (*isIntPositivePtrType)(int);
+
+static isIntPositivePtrType getIsIntPositivePtr() {
+    return &__isIntPositive;
+}
+
+static unsigned int getMaxUInt(void) {
+    return 0xffffffff;
+}
+
+static typeof(&getMaxUInt) getMaxUIntGetter() {
+    return &getMaxUInt;
+}
+
+typedef int (*longSignatureFunctionPtrType)(
+    int, int, int, int, int, int, int, int, int, int, int, int,
+    int, int, int, int, int, int, int, int, int, int, int
+);
+
+typedef int (*notSoLongSignatureFunctionPtrType)(
+    int, int, int, int, int, int, int, int, int, int, int,
+    int, int, int, int, int, int, int, int, int, int, int
+);
+
+static int longSignatureFunction(
+    int p1, int p2, int p3, int p4, int p5, int p6, int p7, int p8, int p9, int p10, int p11, int p12,
+    int p13, int p14, int p15, int p16, int p17, int p18, int p19, int p20, int p21, int p22, int p23
+) {
+    return 42;
+}
+
+static int notSoLongSignatureFunction(
+    int p1, int p2, int p3, int p4, int p5, int p6, int p7, int p8, int p9, int p10, int p11, int p12,
+    int p13, int p14, int p15, int p16, int p17, int p18, int p19, int p20, int p21, int p22
+) {
+    return 42;
+}
+
+static longSignatureFunctionPtrType getLongSignatureFunctionPtr() {
+    return &longSignatureFunction;
+}
+
+static notSoLongSignatureFunctionPtrType getNotSoLongSignatureFunctionPtr() {
+    return &notSoLongSignatureFunction;
+}

native/native.tests/testData/CInterop/executable/funptr/funptr.kt

@@ -0,0 +1,48 @@
+// OUT_DATA_FILE: funptr.out
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
+
+import kotlinx.cinterop.*
+import funptr.*
+import kotlin.test.*
+
+typealias NotSoLongSignatureFunction = (
+    Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int,
+    Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int
+) -> Int
+
+fun main(args: Array<String>) {
+    val atoiPtr = getAtoiPtr()!!
+
+    val getPrintIntPtrPtr = getGetPrintIntPtrPtr()!!
+    val printIntPtr = getPrintIntPtrPtr()!!.reinterpret<CFunction<(Int) -> Unit>>()
+
+    val fortyTwo = memScoped {
+        atoiPtr("42".cstr.getPointer(memScope))
+    }
+
+    printIntPtr(fortyTwo)
+
+    printIntPtr(
+            getDoubleToIntPtr()!!(
+                    getAddPtr()!!(5.1, 12.2)
+            )
+    )
+
+    val isIntPositivePtr = getIsIntPositivePtr()!!
+
+    printIntPtr(isIntPositivePtr(42).ifThenOneElseZero())
+    printIntPtr(isIntPositivePtr(-42).ifThenOneElseZero())
+
+    assertEquals(getMaxUIntGetter()!!(), UInt.MAX_VALUE)
+
+    val longSignaturePtr: COpaquePointer? = getLongSignatureFunctionPtr()
+    val notSoLongSignaturePtr: CPointer<CFunction<NotSoLongSignatureFunction>>? = getNotSoLongSignatureFunctionPtr()
+    printIntPtr(notSoLongSignaturePtr!!.invoke(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0))
+    printIntPtr(notSoLongSignatureFunction(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0))
+}
+
+fun Boolean.ifThenOneElseZero() = if (this) 1 else 0

native/native.tests/testData/CInterop/executable/funptr/funptr.out

@@ -0,0 +1,6 @@
+42
+17
+1
+0
+42
+42