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
do_test(void)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 }
94