Hello, i have a question about using cinterop in kotlin native. I need to pass kotlin string to C function with signature like this:

someFunctionFromC(data: kotlinx.cinterop.CValuesRef<libmylib.GByteVar /* = kotlinx.cinterop.UByteVarOf<libmylib.GByte /* = kotlin.UByte */> */>?)

So, i tried to use ‘cstr’ how it described here (https://kotlinlang.org/docs/tutorials/native/mapping-strings-from-c.html):

val kotlinString = "qwerty"
someFunctionFromC(kotlinString.cstr)

but i get type mismatch:

Type mismatch:
Required : CValuesRef<GByteVar /* = UByteVarOf<GByte /* = UByte */> */>?
Found : CValues<ByteVar /* = ByteVarOf<Byte  /*>

So i need to pass in C function not

const char* cstring

, but

const unsigned char* cstring

Solution that i found (https://github.com/JetBrains/kotlin-native/blob/master/INTEROP.md):

kotlinString.toUtf8().toUByteArray().usePinned { kString ->
    someFunctionFromC(kString.adressOf(0))
}

It work, but doesn’t look well. Maybe someone can suggest a better way?

kotlinString.cstr.convert()

dosn't work too?

There is not such function:```Unresolved reference: convert```

practically

kotlinString.cstr as CValuesRef<GByteVar>

may work

I just tried this, it compiles, but it breaks somewhere insight the C-library