kotlin-native-read

    val fd = open(file_path, O_RDONLY)

    val buffer_size = 2
    val buffer = nativeHeap.allocArray<ByteVar>(buffer_size)

    var bytesRead: ssize_t = 0

    while (bytesRead < 19) {
        val ret = read(fd, buffer + bytesRead, (buffer_size).convert())

        println(buffer.toKString())

        if (ret == 0L) break; /* EOF */


        if (ret == -1L) { /* Handle error */ }

        bytesRead += ret;
    }

kotlin-native-read-chunk

open class InputStream(path: String) {

    private var fd: Int = -1
    private var bytesRead = 0L
    private var contentSize = 0L

    init {
        fd = open(path, O_RDONLY)
        contentSize = nativeHeap.alloc<stat>().apply { stat(path, this.ptr) }.st_size -1
    }

    fun read(buffer: CArrayPointer<ByteVar>, buffsize: Long): CArrayPointer<ByteVar> {
        val ret = read(fd, buffer, buffsize.convert())
        bytesRead += ret

        return buffer
        //if (ret == 0L) break; /* EOF */
        //if (ret == -1L) { break; /* Handle error */ }
    }

    fun available() = bytesRead < contentSize

}