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glibc/libio/tst-ungetwc2.c
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/* 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; | |
char fname[] = "/tmp/tst-ungetwc2.out.XXXXXX"; | |
int fd; | |
long int pos; | |
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\n"); | |
exit (EXIT_FAILURE); | |
} | |
/* Write some characters to `testfile'. */ | |
fd = mkstemp (fname); | |
if (fd == -1) | |
{ | |
printf ("cannot open temp file: %m\n"); | |
exit (EXIT_FAILURE); | |
} | |
if ((fp = fdopen (fd, "w")) == NULL) | |
{ | |
fprintf (stderr, "Cannot open 'testfile'.\n"); | |
exit (EXIT_FAILURE); | |
} | |
fputs (str, fp); | |
fclose (fp); | |
/* Open `testfile'. */ | |
if ((fp = fopen (fname, "r")) == NULL) | |
{ | |
fprintf (stderr, "Cannot open 'testfile'."); | |
exit (EXIT_FAILURE); | |
} | |
/* Get a character. */ | |
wc = getwc (fp); | |
pos = ftell (fp); | |
printf ("After get a character: %ld\n", pos); | |
if (pos != 1) | |
result = 1; | |
/* Unget a character. */ | |
ret = ungetwc (wc, fp); | |
if (ret == WEOF) | |
{ | |
fprintf (stderr, "ungetwc() returns NULL."); | |
exit (EXIT_FAILURE); | |
} | |
pos = ftell (fp); | |
printf ("After unget a character: %ld\n", pos); | |
if (pos != 0) | |
result = 1; | |
/* Reget a character. */ | |
wc = getwc (fp); | |
pos = ftell (fp); | |
printf ("After reget a character: %ld\n", pos); | |
if (pos != 1) | |
result = 1; | |
fclose (fp); | |
unlink (fname); | |
return result; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |