/* sim-time.c -- stubs so clock can be linked in.
 *
 * Copyright (c) 2008 Anthony Green
 *
 * The authors hereby grant permission to use, copy, modify, distribute,
 * and license this software and its documentation for any purpose, provided
 * that existing copyright notices are retained in all copies and that this
 * notice is included verbatim in any distributions. No written agreement,
 * license, or royalty fee is required for any of the authorized uses.
 * Modifications to this software may be copyrighted by their authors
 * and need not follow the licensing terms described here, provided that
 * the new terms are clearly indicated on the first page of each file where
 * they apply.
 */
#include <errno.h>
#include <sys/time.h>
#include <sys/times.h>
#include "glue.h"

/*
 * time -- simulator interface to return current time in seconds.
 */
__asm__ ("\
	.text\n\
	.globl	_sim_time\n\
	.type	_sim_time,@function\n\
_sim_time:\n\
        jmpa _sim_time\n\
	ret\n\
.Lsim:\n\
	.size	_sim_time,.Lsim-_sim_time");

extern time_t _sim_time (void) __asm__("_sim_time");


/*
 * time -- return current time in seconds.
 */
time_t
_DEFUN (time, time (t),
	time_t *t)
{
  time_t ret = _sim_time ();

  if (t)
    *t = ret;

  return ret;
}

/*
 * _times -- no clock, so return an error.
 */
int
_DEFUN (_times, _times (buf),
	struct tms *buf)
{
  errno = EINVAL;
  return (-1);
}

/*
 * _gettimeofday -- implement in terms of time, which means we can't return the
 * microseconds.
 */
int
_DEFUN (_gettimeofday, _gettimeofday (tv, tz),
	struct timeval *tv _AND
	void *tzvp)
{
  struct timezone *tz = tzvp;
  if (tz)
    tz->tz_minuteswest = tz->tz_dsttime = 0;

  tv->tv_usec = 0;
  tv->tv_sec = _sim_time ();
  return 0;
}