#include "time.h"

#ifdef MSDOS
#undef USE_CLOCK
#define USE_CLOCK
#endif

#ifndef USE_CLOCK
#define _INCLUDE_POSIX_SOURCE	/* for HP-UX */
#define _INCLUDE_XOPEN_SOURCE	/* for HP-UX */
#include "sys/types.h"
#include "sys/times.h"
#endif

#undef Hz
#ifdef CLK_TCK
#define Hz CLK_TCK
#else
#ifdef HZ
#define Hz HZ
#else
#define Hz 60
#endif
#endif

double
dtime_ (float *tarray)
{
#ifdef USE_CLOCK
#ifndef CLOCKS_PER_SECOND
#define CLOCKS_PER_SECOND Hz
#endif
  static double t0;
  double t = clock ();
  tarray[1] = 0;
  tarray[0] = (t - t0) / CLOCKS_PER_SECOND;
  t0 = t;
  return tarray[0];
#else
  struct tms t;
  static struct tms t0;

  times (&t);
  tarray[0] = (double) (t.tms_utime - t0.tms_utime) / Hz;
  tarray[1] = (double) (t.tms_stime - t0.tms_stime) / Hz;
  t0 = t;
  return tarray[0] + tarray[1];
#endif
}