ftime.c

来自「glibc 库, 不仅可以学习使用库函数,还可以学习函数的具体实现,是提高功力的」· C语言 代码 · 共 43 行

/* Copyright (C) 1994, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <sys/timeb.h>
#include <sys/time.h>

int
ftime (timebuf)
     struct timeb *timebuf;
{
  struct timeval tv;
  struct timezone tz;

  if (__gettimeofday (&tv, &tz) < 0)
    return -1;

  timebuf->time = tv.tv_sec;
  timebuf->millitm = (tv.tv_usec + 500) / 1000;
  if (timebuf->millitm == 1000)
    {
      ++timebuf->time;
      timebuf->millitm = 0;
    }
  timebuf->timezone = tz.tz_minuteswest;
  timebuf->dstflag = tz.tz_dsttime;
  return 0;
}