---

4.4 Register

This example demonstrates how a domain label is processed before it is registered in the DNS. The input expected is in the locale encoding.

#include <stdio.h>		/* printf, fflush, fgets, stdin, perror, fprintf */
#include <string.h>		/* strlen */
#include <locale.h>		/* setlocale */
#include <stdlib.h>		/* free */
#include <idn2.h>		/* idn2_register_ul, IDN2_OK, idn2_strerror, idn2_strerror_name */

int
main (int argc, char *argv[])
{
  int rc;
  char src[BUFSIZ];
  char *insertname;

  setlocale (LC_ALL, "");

  printf ("Enter (possibly non-ASCII) label to register: ");
  fflush (stdout);
  if (!fgets (src, sizeof (src), stdin))
    {
      perror ("fgets");
      return 1;
    }
  src[strlen (src) - 1] = '\0';

  rc = idn2_register_ul (src, NULL, &insertname, 0);
  if (rc != IDN2_OK)
    {
      fprintf (stderr, "error: %s (%s, %d)\n",
	       idn2_strerror (rc), idn2_strerror_name (rc), rc);
      return 1;
    }

  printf ("IDNA2008 label to register in DNS: %s\n", insertname);

  free (insertname);

  return 0;
}