tests/test-freadptr2.c

   1 /* Test of freadptr() function.
   2    Copyright (C) 2007-2020 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
  30 freadptrbufsize (FILE *fp)
  31 {
  32   size_t size = 0;
  33
  34   freadptr (fp, &size);
  35   return size;
  36 }
  37
  38 int
  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       free (buf);
  47     }
  48
  49   if (nbytes == 0)
  50     ASSERT (freadptrbufsize (stdin) == 0);
  51   else
  52     {
  53       if (lseek (0, 0, SEEK_CUR) == nbytes)
  54         /* An unbuffered stdio, such as BeOS or on uClibc compiled without
  55            __STDIO_BUFFERS.  */
  56         ASSERT (freadptrbufsize (stdin) == 0);
  57       else
  58         /* Normal buffered stdio.  */
  59         ASSERT (freadptrbufsize (stdin) != 0);
  60     }
  61
  62   return 0;
  63 }