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glibc/libio/bug-ungetwc1.c
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#define _XOPEN_SOURCE 500 | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <locale.h> | |
#include <wchar.h> | |
const char write_chars[] = "ABC"; /* Characters on testfile. */ | |
const wint_t unget_wchar = L'A'; /* Ungotten wide character. */ | |
char *fname; | |
static int do_test (void); | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" | |
static int | |
do_test (void) | |
{ | |
wint_t wc; | |
FILE *fp; | |
int fd; | |
fname = (char *) malloc (strlen (test_dir) + sizeof "/bug-ungetwc1.XXXXXX"); | |
if (fname == NULL) | |
{ | |
puts ("no memory"); | |
return 1; | |
} | |
strcpy (stpcpy (fname, test_dir), "/bug-ungetwc1.XXXXXX"); | |
fd = mkstemp (fname); | |
if (fd == -1) | |
{ | |
printf ("cannot open temporary file: %m\n"); | |
return 1; | |
} | |
add_temp_file (fname); | |
setlocale(LC_ALL, ""); | |
/* Output to the file. */ | |
if ((fp = fdopen (fd, "w")) == NULL) | |
{ | |
fprintf (stderr, "Cannot make `%s' file\n", fname); | |
exit (EXIT_FAILURE); | |
} | |
fprintf (fp, "%s", write_chars); | |
fclose (fp); | |
/* Read from the file. */ | |
fp = fopen (fname, "r"); | |
size_t i = 0; | |
while (!feof (fp)) | |
{ | |
wc = getwc (fp); | |
if (i >= sizeof (write_chars)) | |
{ | |
printf ("Did not get end-of-file when expected.\n"); | |
return 1; | |
} | |
else if (wc != (write_chars[i] ? write_chars[i] : WEOF)) | |
{ | |
printf ("Unexpected %lu from getwc.\n", (unsigned long int) wc); | |
return 1; | |
} | |
i++; | |
} | |
printf ("\nThe end-of-file indicator is set.\n"); | |
/* Unget a wide character. */ | |
ungetwc (unget_wchar, fp); | |
printf ("< `%lc' is ungotten.\n", unget_wchar); | |
/* Check the end-of-file indicator. */ | |
if (feof (fp)) | |
{ | |
printf ("The end-of-file indicator is still set.\n"); | |
return 1; | |
} | |
else | |
printf ("The end-of-file flag is cleared.\n"); | |
fflush (stdout); | |
fclose (fp); | |
return 0; | |
} |