/* $DOC$
   $NAME$
      ft_WoY()
   $CATEGORY$
      Date/Time
   $ONELINER$
      Find number of week within year
   $SYNTAX$
      ft_WoY( <dDate> ) -> <nResult>
   $ARGUMENTS$
      <dDate> is a date in the form "mm/dd/yy" or "mm/dd/yyyy"
   $RETURNS$
      Return numeric position of week within the year or NIL if
      parameter does not conform.
   $DESCRIPTION$
      Considers a full week as starting on Sunday, ending on Saturday.
      First week of year (week 1) may start on any day, and thus
        contain any number of days.
      Final week of year (week 53) may contain any number of days.
      Handles dates with CENTURY ON|OFF, to allow for 21st century.
      Date validation must be external to this function.
   $EXAMPLES$
      // These code fragments find the week number, given a date.

      // literal character date
      dDate  := hb_SToD( "19910101" )
      nWkNum := ft_WoY( dDate )            // result:  1

      // presume DOS date to be 1991-01-06
      nWkNum := ft_WoY( Date() )           // result:  2

      // date input
      dDate := hb_SToD()
      @ 4, 10 GET cDate                    // input 1991-07-04
      READ
      nWkNum := ft_WoY( dDate )            // result: 27

      // last day of year
      nWkNum := ft_WoY( hb_SToD( "19911231" ) ) // result: 53
   $END$
 */

/* $DOC$
   $NAME$
      ft_DoY()
   $CATEGORY$
      Date/Time
   $ONELINER$
      Find number of day within year
   $SYNTAX$
      ft_DoY( <dDate> ) -> <nResult>
   $ARGUMENTS$
      <dDate> is a date in the form "mm/dd/yy" or "mm/dd/yyyy"
   $RETURNS$
      Return numeric position of day within the year.
      Return NIL if parameter does not conform.
   $DESCRIPTION$
      Finds the day number, considering 01/01 as day 1
      Handles dates with CENTURY ON|OFF, to allow for 21st century.
      Date validation must be external to this function.
   $EXAMPLES$
      // These code fragments find the day number, given a date.

      // literal character date
      dDate  := hb_SToD( "19910101" )
      nDayNum := ft_DoY( dDate )            // result:  1

      // presume DOS date to be 1991-01-06
      nDayNum := ft_DoY( Date() )           // result:  6

      // date input
      dDate := hb_SToD()
      @ 4, 10 GET cDate                     // input 1991-07-04
      READ
      nDayNum := ft_DoY( dDate )            // result: 185

      // last day of year
      nDayNum := ft_DoY( hb_SToD( "19911231" ) ) // result: 365
   $END$
 */
