/* Taken from the Li18nux base test suite.  */

#define _XOPEN_SOURCE 500

#include <locale.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <wchar.h>

static int

do_test (void)

{

  FILE *fp;

  const char *str = "abcdef";

  wint_t ret, wc, ungetone = 0x00E4;	/* 0x00E4 means `a umlaut'. */

  char fname[] = "/tmp/tst-ungetwc1.out.XXXXXX";

  int fd;

  int result = 0;

  puts ("This program runs on de_DE.UTF-8 locale.");

  if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL)

    {

      fprintf (stderr, "Err: Cannot run on the de_DE.UTF-8 locale");

      exit (EXIT_FAILURE);

    }

  fd = mkstemp (fname);

  if (fd == -1)

    {

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

      exit (EXIT_FAILURE);

    }

  /* Write some characters to `testfile'. */

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

    {

      fprintf (stderr, "Cannot open 'testfile'.");

      exit (EXIT_FAILURE);

    }

  fputs (str, fp);

  fclose (fp);

  /* Open `testfile'. */

  if ((fp = fopen (fname, "r")) == NULL)

    {

      fprintf (stderr, "Cannot open 'testfile'.");

      exit (EXIT_FAILURE);

    }

  /* Unget a character. */

  ret = ungetwc (ungetone, fp);

  printf ("Unget a character (0x%04x)\n", (unsigned int) ungetone);

  fflush (stdout);

  if (ret == WEOF)

    {

      puts ("ungetwc() returns NULL.");

      exit (EXIT_SUCCESS);

    }

  /* Reget a character. */

  wc = getwc (fp);

  printf ("Reget a character (0x%04x)\n", (unsigned int) wc);

  fflush (stdout);

  if (wc == ungetone)

    {

      puts ("The ungotten character is equal to the regotten character.");

      fflush (stdout);

    }

  else

    {

      puts ("The ungotten character is not equal to the regotten character.");

      printf ("ungotten one: %04x, regetone: %04x", ungetone, wc);

      fflush (stdout);

      result = 1;

    }

  fclose (fp);

  unlink (fname);

  return result;

}

#define TEST_FUNCTION do_test ()

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