1: #define _XOPEN_SOURCE 500
    2: #include <errno.h>
    3: #include <error.h>
    4: #include <stdio.h>
    5: #include <stdlib.h>
    6: #include <locale.h>
    7: #include <wchar.h>
    8: 
    9: const char test_locale[] = "de_DE.UTF-8";
   10: const wchar_t write_wchars[] = {L'A', 0x00C4, L'B', L'\0'};
   11:                                 /* `0x00C4' is A with diaeresis. */
   12: size_t last_pos = 2;            /* Which character is last one to read. */
   13: wint_t unget_wchar = L'C';      /* Ungotten ide characters. */
   14: 
   15: char *fname;
   16: 
   17: 
   18: static int do_test (void);
   19: #define TEST_FUNCTION do_test ()
   20: 
   21: #include "../test-skeleton.c"
   22: 
   23: 
   24: static int
   25: do_test (void)
   26: {
   27:   size_t i;
   28:   wint_t wc;
   29:   FILE *fp;
   30:   int fd;
   31: 
   32:   fname = (char *) malloc (strlen (test_dir) + sizeof "/bug-ungetwc2.XXXXXX");
   33:   if (fname == NULL)
   34:     {
   35:       puts ("no memory");
   36:       return 1;
   37:     }
   38:   strcpy (stpcpy (fname, test_dir), "/bug-ungetwc2.XXXXXX");
   39:   fd = mkstemp (fname);
   40:   if (fd == -1)
   41:     {
   42:       printf ("cannot open temporary file: %m\n");
   43:       return 1;
   44:     }
   45:   add_temp_file (fname);
   46: 
   47:   printf ("\nNote: This program runs on %s locale.\n\n", test_locale);
   48: 
   49:   if (setlocale (LC_ALL, test_locale) == NULL)
   50:     {
   51:       fprintf (stderr, "Cannot use `%s' locale.\n", test_locale);
   52:       exit (EXIT_FAILURE);
   53:     }
   54: 
   55:   /* Output to the file. */
   56:   if ((fp = fdopen (fd, "w")) == NULL)
   57:     {
   58:       setlocale (LC_ALL, "C");
   59:       fprintf (stderr, "Cannot make `%s' file.\n", fname);
   60:       exit (EXIT_FAILURE);
   61:     }
   62:   fprintf (fp, "%ls", write_wchars);
   63:   fclose (fp);
   64: 
   65:   /* Read from the file. */
   66:   fp = fopen (fname, "r");
   67:   if (fp == NULL)
   68:     {
   69:       setlocale (LC_ALL, "C");
   70:       error (EXIT_FAILURE, errno, "cannot open %s", fname);
   71:     }
   72: 
   73:   printf ("%s is opened.\n", fname);
   74: 
   75:   for (i = 0; i < last_pos; i++)
   76:     {
   77:       wc = getwc (fp);
   78:       printf ("> `%lc' is gotten.\n", wc);
   79:     }
   80: 
   81:   /* Unget a wide character. */
   82:   ungetwc (unget_wchar, fp);
   83:   printf ("< `%lc' is ungotten.\n", unget_wchar);
   84: 
   85:   /* Reget the wide character. */
   86:   wc = getwc (fp);
   87:   printf ("> `%lc' is regotten.\n", wc);
   88: 
   89:   fflush (stdout);
   90:   fclose (fp);
   91: 
   92:   return 0;
   93: }