Support Boolean in interop varargs and function pointers invocation

Interop/Runtime/src/native/kotlin/kotlinx/cinterop/FunctionPointers.kt

@@ -70,6 +70,10 @@ private fun invokeImplUnitRet(ptr: COpaquePointer, vararg args: Any?): Unit = me
     callWithVarargs(ptr.rawValue, nativeNullPtr, FFI_TYPE_KIND_VOID, args, emptyArray(), memScope)
 }
 
+@ExportForCompiler
+private fun invokeImplBooleanRet(ptr: COpaquePointer, vararg args: Any?): Boolean =
+        invokeImplByteRet(ptr, *args).toBoolean()
+
 @ExportForCompiler
 private fun invokeImplByteRet(ptr: COpaquePointer, vararg args: Any?): Byte = memScoped {
     val resultBuffer = allocFfiReturnValueBuffer<ByteVar>(ByteVar)

Interop/Runtime/src/native/kotlin/kotlinx/cinterop/Varargs.kt

@@ -38,6 +38,8 @@ private tailrec fun convertArgument(
         FFI_TYPE_KIND_SINT64
     }
 
+    is Boolean -> convertArgument(argument.toByte(), isVariadic, location, additionalPlacement)
+
     is Byte -> if (isVariadic) {
         convertArgument(argument.toInt(), isVariadic, location, additionalPlacement)
     } else {

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/InteropUtils.kt

@@ -116,6 +116,7 @@ internal class InteropBuiltIns(builtIns: KonanBuiltIns) {
 
     val invokeImpls = mapOf(
             builtIns.unit to "invokeImplUnitRet",
+            builtIns.boolean to "invokeImplBooleanRet",
             builtIns.byte to "invokeImplByteRet",
             builtIns.short to "invokeImplShortRet",
             builtIns.int to "invokeImplIntRet",

backend.native/tests/build.gradle

@@ -2051,7 +2051,7 @@ task interop3(type: RunInteropKonanTest) {
 
 task interop4(type: RunInteropKonanTest) {
     disabled = (project.testTarget == 'wasm32') // No interop for wasm yet.
-    goldValue = "a b -1 2 3 9223372036854775807 0.1 0.2\n1 42\n"
+    goldValue = "a b -1 2 3 9223372036854775807 0.1 0.2 1 0\n1 42\n"
     source = "interop/basics/4.kt"
     interop = 'cstdio'
 }
@@ -2064,7 +2064,7 @@ task interop_bitfields(type: RunInteropKonanTest) {
 
 task interop_funptr(type: RunInteropKonanTest) {
     disabled = (project.testTarget == 'wasm32') // No interop for wasm yet.
-    goldValue = "42\n17\n"
+    goldValue = "42\n17\n1\n0\n"
     source = "interop/basics/funptr.kt"
     interop = 'cfunptr'
 }

backend.native/tests/interop/basics/4.kt

@@ -5,8 +5,8 @@ val stdout
     get() = getStdout()
 
 fun main(args: Array<String>) {
-    fprintf(stdout, "%s %s %d %d %d %lld %.1f %.1lf\n",
-            "a", "b".cstr, (-1).toByte(), 2.toShort(), 3, Long.MAX_VALUE, 0.1.toFloat(), 0.2)
+    fprintf(stdout, "%s %s %d %d %d %lld %.1f %.1lf %d %d\n",
+            "a", "b".cstr, (-1).toByte(), 2.toShort(), 3, Long.MAX_VALUE, 0.1.toFloat(), 0.2, true, false)
 
     memScoped {
         val aVar = alloc<IntVar>()

backend.native/tests/interop/basics/cfunptr.def

@@ -41,4 +41,14 @@ 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;
 }

backend.native/tests/interop/basics/funptr.kt

@@ -18,4 +18,11 @@ fun main(args: Array<String>) {
                     getAddPtr()!!(5.1, 12.2)
             )
     )
-}
+
+    val isIntPositivePtr = getIsIntPositivePtr()!!
+
+    printIntPtr(isIntPositivePtr(42).ifThenOneElseZero())
+    printIntPtr(isIntPositivePtr(-42).ifThenOneElseZero())
+}
+
+fun Boolean.ifThenOneElseZero() = if (this) 1 else 0