examples/example3.c

   1 /* example3.c --- Example ToASCII() code showing how to use Libidn.
   2  * Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007  Simon Josefsson
   3  *
   4  * This file is part of GNU Libidn.
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <locale.h>             /* setlocale() */
  25 #include <stringprep.h>         /* stringprep_locale_charset() */
  26 #include <idna.h>               /* idna_to_ascii_lz() */
  27
  28 /*
  29  * Compiling using libtool and pkg-config is recommended:
  30  *
  31  * $ libtool cc -o example3 example3.c `pkg-config --cflags --libs libidn`
  32  * $ ./example3
  33  * Input domain encoded as `ISO-8859-1': www.räksmörgåsª.example
  34  * 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
  35  * ACE label (length 33): 'www.xn--rksmrgsa-0zap8p.example'
  36  * 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
  37  * $
  38  *
  39  */
  40
  41 int
  42 main (int argc, char *argv[])
  43 {
  44   char buf[BUFSIZ];
  45   char *p;
  46   int rc;
  47   size_t i;
  48
  49   setlocale (LC_ALL, "");
  50
  51   printf ("Input domain encoded as `%s': ", stringprep_locale_charset ());
  52   fflush (stdout);
  53   fgets (buf, BUFSIZ, stdin);
  54   buf[strlen (buf) - 1] = '\0';
  55
  56   printf ("Read string (length %d): ", strlen (buf));
  57   for (i = 0; i < strlen (buf); i++)
  58     printf ("%02x ", buf[i] & 0xFF);
  59   printf ("\n");
  60
  61   rc = idna_to_ascii_lz (buf, &p, 0);
  62   if (rc != IDNA_SUCCESS)
  63     {
  64       printf ("ToASCII() failed (%d): %s\n", rc, idna_strerror (rc));
  65       exit (1);
  66     }
  67
  68   printf ("ACE label (length %d): '%s'\n", strlen (p), p);
  69   for (i = 0; i < strlen (p); i++)
  70     printf ("%02x ", p[i] & 0xFF);
  71   printf ("\n");
  72
  73   free (p);
  74
  75   return 0;
  76 }