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