XProfan

def date_daynum(1) val(substr$(@$(1),1,"."))
def date_monthnum(1) val(substr$(@$(1),2,"."))
def date_yearnum(1) val(substr$(@$(1),3,"."))
def date_equyear(2) equ(date_yearnum(@$(1)),date_yearnum(@$(2)))
def date_equmonth(2) equ(date_monthnum(@$(1)),date_monthnum(@$(2)))
def date_equday(2) equ(date_daynum(@$(1)),date_daynum(@$(2)))
def date_equ(2) and( and(date_equyear(@$(1),@$(2)),date_equmonth(@$(1),@$(2))),date_equday(@$(1),@$(2)))
def date_yeardif(2) sub(date_yearnum(@$(2)),date_yearnum(@$(1)))
def date_monthdif(2) sub(date_monthnum(@$(2)),date_monthnum(@$(1)))
def date_daydif(2) sub(date_daynum(@$(2)),date_daynum(@$(1)))

proc date_past

    parameters s$,ss$
    declare yd%,md%,dd%
    yd%=date_yeardif(s$,ss$)
    case lt(yd%,0) : return 1
    case gt(yd%,0) : return 0
    md%=date_monthdif(s$,ss$)
    case lt(md%,0) : return 1
    case gt(md%,0) : return 0
    dd%=date_daydif(s$,ss$)
    case lt(Dd%,0) : return 1
    RETURN 0

endproc

proc date_future

    parameters s$,ss$
    declare yd%,md%,dd%
    case date_equ(s$,ss$) : return 0
    date_past s$,ss$
    case @%(0) : return 0
    return 1

endproc