RCS_ID_C="$Id: gettimeofday.c,v 1.1 1993/10/18 06:23:47 jraja Exp $"
/*
 * gettimeofday.c --- get time of the day
 *
 * Author: jraja <Jarno.Rajahalme@hut.fi>
 *
 * Copyright © 1993 AmiTCP/IP Group, <amitcp-group@hut.fi>
 *                  Helsinki University of Technology, Finland.
 *                  All rights reserved.
 *
 * Created      : Wed Sep 01 22:45:12 1993 jraja
 * Last modified: Wed Sep 01 22:45:12 1993 jraja
 *
 * $Log: gettimeofday.c,v $
 * Revision 1.1  1993/10/18  06:23:47  jraja
 * Initial revision
 *
 */

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

/****** net.lib/gettimeofday *********************************************
*
*   NAME   
*       gettimeofday - get date and time 
*
*   SYNOPSIS
*       #include <sys/time.h>
*
*       error = gettimeofday(tp, tzp)
*
*       int gettimeofday(struct timeval *, struct timezone *)
*
*   FUNCTION
*       The system's notion of the current Greenwich time and the
*       current time zone is obtained with the gettimeofday() call.
*       The time is expressed in seconds and microseconds since
*       midnight (0 hour), January 1, 1970.  The resolution of the
*       system clock is hardware dependent. If tzp is zero, the time
*       zone information will not be returned. Also, if your system
*       software is unable to provide time zone information, the
*       structure pointed by tzp will be filled with zeroes.
*  
*   PORTABILITY
*       UNIX
*
*   INPUTS
*       The structures pointed to by tp and tzp are defined in
*       <sys/time.h> as:
*  
*            struct timeval {
*                 long tv_sec;      \* seconds since Jan. 1, 1970 *\
*                 long tv_usec;     \* and microseconds *\
*            };
*  
*            struct timezone {
*                 int  tz_minuteswest;   \* of Greenwich *\
*                 int  tz_dsttime;  \* type of dst correction to apply *\
*            };
*  
*       The timezone structure indicates the local time zone (meas-
*       ured in minutes of time westward from Greenwich), and a flag
*       that, if nonzero, indicates that Daylight Saving time
*       applies locally during the appropriate part of the year.
*
*   RESULT
*       Returns 0 when successful and -1 with specific error code in 
*       errno in case of an error. No error codes are specified,
*       however.
*       
*   NOTES
*       gettimeofday() uses GetSysTime() function of the timer.device,
*       which is new to V36 of the device.
*
*       Time zone information is available only if your system has
*       locale.library, which is included in all Amiga systems from
*       2.1 and up.
*
*       Global variable TimerBase _must_ be initialized before
*       gettimeofday() is called. This is normally done automatically
*       by the autoinit module (timerinit.c) included in the net.lib.
*
*   BUGS
*       The time zones are currently not supported.
*
*   SEE ALSO
*       timer.device/GetSysTime()
*****************************************************************************
*
*/

/*
 * See timerinit.c for comments on these
 */
extern struct timezone __time_zone;
extern long __local_to_GMT;

int 
gettimeofday(struct timeval *tp, struct timezone *tzp)
{
  if (tp) {
    GetSysTime(tp);
    tp->tv_sec += __local_to_GMT;
  }
  if (tzp) {
    /*
     * __time_zone is set up in the timerinit.c
     */
    *tzp = __time_zone;
  }

  return 0;
}