examples/example3.c

   1 /* example3.c   Example ToASCII() code showing how to use Libidn.
   2  * Copyright (C) 2002, 2003, 2004  Simon Josefsson
   3  *
   4  * This file is part of GNU Libidn.
   5  *
   6  * GNU Libidn is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * GNU Libidn is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with GNU Libidn; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <locale.h>             /* setlocale() */
  26 #include <stringprep.h>         /* stringprep_locale_charset() */
  27 #include <idna.h>               /* idna_to_ascii_lz() */
  28
  29 /*
  30  * Compiling using libtool and pkg-config is recommended:
  31  *
  32  * $ libtool cc -o example3 example3.c `pkg-config --cflags --libs libidn`
  33  * $ ./example3
  34  * Input domain encoded as `ISO-8859-1': www.räksmörgåsª.example
  35  * Read string (length 23): 77 77 77 2e 72 e4 6b 73 6d f6 72 67 e5 73 aa 2e 65 78 61 6d 70 6c 65
  36  * ACE label (length 33): 'www.xn--rksmrgsa-0zap8p.example'
  37  * 77 77 77 2e 78 6e 2d 2d 72 6b 73 6d 72 67 73 61 2d 30 7a 61 70 38 70 2e 65 78 61 6d 70 6c 65
  38  * $
  39  *
  40  */
  41
  42 int
  43 main (int argc, char *argv[])
  44 {
  45   char buf[BUFSIZ];
  46   char *p;
  47   int rc;
  48   size_t i;
  49
  50   setlocale (LC_ALL, "");
  51
  52   printf ("Input domain encoded as `%s': ", stringprep_locale_charset ());
  53   fflush (stdout);
  54   fgets (buf, BUFSIZ, stdin);
  55   buf[strlen (buf) - 1] = '\0';
  56
  57   printf ("Read string (length %d): ", strlen (buf));
  58   for (i = 0; i < strlen (buf); i++)
  59     printf ("%02x ", buf[i] & 0xFF);
  60   printf ("\n");
  61
  62   rc = idna_to_ascii_lz (buf, &p, 0);
  63   if (rc != IDNA_SUCCESS)
  64     {
  65       printf ("ToASCII() failed... %d\n", rc);
  66       exit (1);
  67     }
  68
  69   printf ("ACE label (length %d): '%s'\n", strlen (p), p);
  70   for (i = 0; i < strlen (p); i++)
  71     printf ("%02x ", p[i] & 0xFF);
  72   printf ("\n");
  73
  74   free (p);
  75
  76   return 0;
  77 }