#define _XOPEN_SOURCE 500

#include <errno.h>

#include <error.h>

#include <stdio.h>

#include <stdlib.h>

#include <locale.h>

#include <wchar.h>

const char test_locale[] = "de_DE.UTF-8";

const wchar_t write_wchars[] = {L'A', 0x00C4, L'B', L'\0'};

                                /* `0x00C4' is A with diaeresis. */

size_t last_pos = 2;            /* Which character is last one to read. */

wint_t unget_wchar = L'C';      /* Ungotten ide characters. */

char *fname;

static int do_test (void);

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"

static int

do_test (void)

{

  size_t i;

  wint_t wc;

  FILE *fp;

  int fd;

  fname = (char *) malloc (strlen (test_dir) + sizeof "/bug-ungetwc2.XXXXXX");

  if (fname == NULL)

    {

      puts ("no memory");

      return 1;

    }

  strcpy (stpcpy (fname, test_dir), "/bug-ungetwc2.XXXXXX");

  fd = mkstemp (fname);

  if (fd == -1)

    {

      printf ("cannot open temporary file: %m\n");

      return 1;

    }

  add_temp_file (fname);

  printf ("\nNote: This program runs on %s locale.\n\n", test_locale);

  if (setlocale (LC_ALL, test_locale) == NULL)

    {

      fprintf (stderr, "Cannot use `%s' locale.\n", test_locale);

      exit (EXIT_FAILURE);

    }

  /* Output to the file. */

  if ((fp = fdopen (fd, "w")) == NULL)

    {

      setlocale (LC_ALL, "C");

      fprintf (stderr, "Cannot make `%s' file.\n", fname);

      exit (EXIT_FAILURE);

    }

  fprintf (fp, "%ls", write_wchars);

  fclose (fp);

  /* Read from the file. */

  fp = fopen (fname, "r");

  if (fp == NULL)

    {

      setlocale (LC_ALL, "C");

      error (EXIT_FAILURE, errno, "cannot open %s", fname);

    }

  printf ("%s is opened.\n", fname);

  for (i = 0; i < last_pos; i++)

    {

      wc = getwc (fp);

      printf ("> `%lc' is gotten.\n", wc);

    }

  /* Unget a wide character. */

  ungetwc (unget_wchar, fp);

  printf ("< `%lc' is ungotten.\n", unget_wchar);

  /* Reget the wide character. */

  wc = getwc (fp);

  printf ("> `%lc' is regotten.\n", wc);

  fflush (stdout);

  fclose (fp);

  return 0;

}