Java Panama Kotlin - convert list of ASCII strings

utils.kt

import java.lang.foreign.Arena
import java.lang.foreign.MemorySegment
import java.lang.foreign.ValueLayout.ADDRESS
import java.lang.foreign.ValueLayout.JAVA_BYTE
import java.nio.charset.StandardCharsets

fun convertToC(arena: Arena, args: List<String>): Pair<Int, MemorySegment> {
    val argc = args.size
    val argv = arena.allocateArray(ADDRESS, argc.toLong())

    for (i in args.indices) {
        val bytes = args[i].toByteArray(StandardCharsets.US_ASCII)
        val stringSegment = arena.allocate((bytes.size + 1).toLong())
        stringSegment.copyFrom(MemorySegment.ofArray(bytes))
        stringSegment.setAtIndex(JAVA_BYTE, bytes.size.toLong(), 0.toByte()) // Null terminator
        argv.setAtIndex(ADDRESS, i.toLong(), stringSegment)
    }

    return Pair(argc, argv)
}