1 /* Test of freadptr() function.
2 Copyright (C) 2007-2018 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
18
19 #include <config.h>
20
21 #include "freadptr.h"
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <unistd.h>
26
27 #include "macros.h"
28
29 static int
freadptrbufsize(FILE * fp)30 freadptrbufsize (FILE *fp)
31 {
32 size_t size = 0;
33
34 freadptr (fp, &size);
35 return size;
36 }
37
38 int
main(int argc,char ** argv)39 main (int argc, char **argv)
40 {
41 int nbytes = atoi (argv[1]);
42 if (nbytes > 0)
43 {
44 void *buf = malloc (nbytes);
45 ASSERT (fread (buf, 1, nbytes, stdin) == nbytes);
46 }
47
48 if (nbytes == 0)
49 ASSERT (freadptrbufsize (stdin) == 0);
50 else
51 {
52 if (lseek (0, 0, SEEK_CUR) == nbytes)
53 /* An unbuffered stdio, such as BeOS or on uClibc compiled without
54 __STDIO_BUFFERS. */
55 ASSERT (freadptrbufsize (stdin) == 0);
56 else
57 /* Normal buffered stdio. */
58 ASSERT (freadptrbufsize (stdin) != 0);
59 }
60
61 return 0;
62 }
63