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#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[] = "en_US.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)
{
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)
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;
}
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