timeutil_norm()

void timeutil_norm

(

timeutil_Ttime *

td

)

Definition at line 187 of file timeutil.c.

References timeutil_date(), TIMEUTIL_FIRST_LINEAR, timeutil_is_leap(), timeutil_limits, and TIMEUTIL_N_ELEMENTS.

Referenced by timeutil_add(), and timeutil_finish().

{
  int i;
  long int carry, diy;
  long int *ptr;

  ptr=(long int *)td;

  /* set correct values up to hours            */
  /* carry to doy values is worked out         */
  /* but doy value may still be incorrect      */
  for (i=TIMEUTIL_N_ELEMENTS-1; i>=TIMEUTIL_FIRST_LINEAR-1; i--) {
    carry=(long int)(ptr[i]/timeutil_limits[i]);
    if (ptr[i]<0) carry=carry-1;
    ptr[i]=ptr[i]-carry*timeutil_limits[i];
    ptr[i-1]=ptr[i-1]+carry;
  }

  /* catch day carry for doy */
  td->doy=td->doy+carry;

  /* work on doy and year                      */
  if (td->year<70) td->year=td->year+2000;
  if (td->year<100) td->year=td->year+1900;
  if (td->doy>0) {
    diy=365;
    if (timeutil_is_leap(td->year)==1) diy=366;
    while (td->doy>diy) {
      td->doy=td->doy-diy;
      td->year=td->year+1;
      diy=365;
      if (timeutil_is_leap(td->year)==1) diy=366;
    }
  } else {
    while (td->doy<1) {
      td->year=td->year-1;
      diy=365;
      if (timeutil_is_leap(td->year)==1) diy=366;
      td->doy=td->doy+diy;
    }
  }
  timeutil_date(td, td->doy);
} /* timeutil_norm */

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