Kotlin Blueprints

Complete code

Finally, after pooling all the bits and pieces of the code explained in the previous sections, here is the complete code:

    import kotlinx.cinterop.*    import platform.posix.*    /**     * The starting point     */    fun main(args: Array<String>) {      // Get command line input      if (args.size != 2) {        println("Usage: csv_filename column_number")        return      }      val fileName = args[0]      val columnNumber = args[1].toInt()      // Open the file      val file = fopen(fileName, "r")      if (file == null) {        perror("Failed to open the file named $fileName")        return      }      val result = mutableMapOf<String, Int>()      try {        memScoped {          // Memory allocation for buffer          val bufferLength = 64 * 1024          val buffer = allocArray<ByteVar>(bufferLength)          while (true) {            // Get line            val nextLine = fgets(buffer ...