From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- sysdeps/posix/gettimeofday.c | 75 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 sysdeps/posix/gettimeofday.c (limited to 'sysdeps/posix/gettimeofday.c') diff --git a/sysdeps/posix/gettimeofday.c b/sysdeps/posix/gettimeofday.c new file mode 100644 index 0000000000..a4bb38a41c --- /dev/null +++ b/sysdeps/posix/gettimeofday.c @@ -0,0 +1,75 @@ +/* Copyright (C) 1991, 1992, 1994, 1995 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include + +#ifndef HAVE_GNU_LD +#define __daylight daylight +#define __timezone timezone +#define __tzname tzname +#endif + + +/* Get the current time of day and timezone information, + putting it into *TV and *TZ. If TZ is NULL, *TZ is not filled. + Returns 0 on success, -1 on errors. */ +int +DEFUN(__gettimeofday, (tv, tz), + struct timeval *tv AND struct timezone *tz) +{ + if (tv == NULL) + { + errno = EINVAL; + return -1; + } + + tv->tv_sec = (long int) time ((time_t *) NULL); + tv->tv_usec = 0L; + + if (tz != NULL) + { + CONST time_t timer = tv->tv_sec; + CONST struct tm *tm; + + CONST long int save_timezone = __timezone; + CONST long int save_daylight = __daylight; + char *save_tzname[2]; + save_tzname[0] = __tzname[0]; + save_tzname[1] = __tzname[1]; + + tm = localtime (&timer); + + tz->tz_minuteswest = __timezone / 60; + tz->tz_dsttime = __daylight; + + __timezone = save_timezone; + __daylight = save_daylight; + __tzname[0] = save_tzname[0]; + __tzname[1] = save_tzname[1]; + + if (tm == NULL) + return -1; + } + + return 0; +} + +weak_alias (__gettimeofday, gettimeofday) -- cgit v1.2.3