time/tst-ftime.c

   1 /* Verify that ftime is sane.
   2    Copyright (C) 2014-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/timeb.h>
  20 #include <stdio.h>
  21 #include <libc-diag.h>
  22
  23 static int
  24 do_test (void)
  25 {
  26   struct timeb prev, curr = {.time = 0, .millitm = 0};
  27   int sec = 0;
  28
  29   while (sec != 3)
  30     {
  31       prev = curr;
  32
  33       /* ftime was deprecated on 2.31.  */
  34       DIAG_PUSH_NEEDS_COMMENT;
  35       DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations");
  36
  37       if (ftime (&curr))
  38         {
  39           printf ("ftime returned an error\n");
  40           return 1;
  41         }
  42
  43       DIAG_POP_NEEDS_COMMENT;
  44
  45       if (curr.time < prev.time)
  46         {
  47           printf ("ftime's time flowed backwards\n");
  48           return 1;
  49         }
  50
  51       if (curr.time == prev.time
  52           && curr.millitm < prev.millitm)
  53         {
  54           printf ("ftime's millitm flowed backwards\n");
  55           return 1;
  56         }
  57
  58       if (curr.time > prev.time)
  59         sec ++;
  60     }
  61   return 0;
  62 }
  63
  64 #define TEST_FUNCTION do_test ()
  65 #include "../test-skeleton.c"