/* Preparations:
- Install locale named 'de_DE.UTF-8' (using localedef).
- Find attached mail.po
- $ mkdir -p de/LC_MESSAGES
  $ msgfmt -c -o de/LC_MESSAGES/mail.mo mail.po
  or
  $ msgfmt -c -o de/LC_MESSAGES/mail.mo mail-utf8.po
- $ gcc -Wall foo.c
- $ LC_ALL=de_DE.UTF-8 ./a.out
*/

#include <libintl.h>
#include <locale.h>
#include <stdio.h>

int
main ()
{
  if (setlocale (LC_ALL, "") == NULL)
    return 1;
  textdomain ("mail");
  bindtextdomain ("mail", ".");

  unsigned int n_recipients;

  n_recipients = 1;
  // The following outputs "1 Empfänger" encoded in UTF-8:
  printf("%s\n", ngettext("recipient", "recipients", n_recipients));

  bind_textdomain_codeset("mail", "ASCII");

  n_recipients = 1;
  // The following outputs "recipient" with the same encoding as the "recipient"
  // argument to ngettext (remember, the the system is assumed to not support
  // conversion from ISO/IEC 8859-1 to ASCII):
  printf("%s\n", ngettext("recipient", "recipients", n_recipients));
  // On GNU gettext, "1 Empfänger" is output in ISO-8859-1 here (i.e. no conversion is done). I think we already agreed on considering this behavior a bug,
}
/*
With a mail.po that contains only umlauts:

Output on glibc systems (e.g. 2.32):
1 Empfänger
1 Empfaenger

Output on non-glibc systems with GNU libiconv:
1 Empfänger
1 Empf"anger

With a mail-utf8.po that contains also Hanzi characters:

Output on glibc systems (e.g. 2.32):
1 Empfänger Chinese (中文,普通话,汉语)      你好
1 Empfaenger Chinese (??,???,??)      ??

Output on non-glibc systems with GNU libiconv:
1 Empfänger Chinese (中文,普通话,汉语)      你好
recipient

*/