time/tst-ftime.c

   1 /* Verify that ftime is sane.
   2    Copyright (C) 2014-2023 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 <features.h>
  20 #include <sys/timeb.h>
  21 #include <libc-diag.h>
  22
  23 #include <support/check.h>
  24
  25 static int
  26 do_test (void)
  27 {
  28   struct timeb prev, curr = {.time = 0, .millitm = 0};
  29   int sec = 0;
  30
  31   while (sec != 3)
  32     {
  33       prev = curr;
  34
  35       /* ftime was deprecated on 2.31.  */
  36       DIAG_PUSH_NEEDS_COMMENT;
  37       DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations");
  38
  39       TEST_COMPARE (ftime (&curr), 0);
  40
  41       DIAG_POP_NEEDS_COMMENT;
  42
  43       TEST_VERIFY (curr.time >= prev.time);
  44
  45       if (curr.time == prev.time)
  46         TEST_VERIFY (curr.millitm >= prev.millitm);
  47
  48       if (curr.time > prev.time)
  49         sec ++;
  50     }
  51   return 0;
  52 }
  53
  54 #include <support/test-driver.c>