dcdatetimemod.f90 File Reference

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Functions/Subroutines
type(dc_difftime) function	dcdatetime_mod_ff (diff1, diff2)

Function/Subroutine Documentation

dcdatetime_mod_ff()

type(dc_difftime) function dcdatetime_mod_ff	(	type(dc_difftime), intent(in)	diff1,
		type(dc_difftime), intent(in)	diff2
	)

Definition at line 11 of file dcdatetimemod.f90.

References dc_date_types::cyclic_mdays, dc_date_internal::dcdate_nondimcheck(), and dc_date_internal::dcdate_normalize().

    !
    ! 引数 <b>diff1</b> を <b>diff2</b> で除算した際の余りを返します.
    !
    ! ※ 注意: 月差と日時の混在する除算は近似的結果になるおそれがあります
    !
    use dc_date_internal, only: dcdate_normalize, dcdate_nondimcheck
    use dc_date_types, only: cyclic_mdays, dc_datetime, dc_difftime
    use dc_scaledsec, only: dc_scaled_sec, &
      & operator(==), operator(<), operator(>), operator(<=), operator(>=), &
      & operator(+), operator(-), operator(*), operator(/), &
      & modscl => mod, modulo, int, abs, sign
    implicit none
    type(dc_difftime):: result
    type(dc_difftime), intent(in):: diff1, diff2
    type(dc_scaled_sec):: sec1, sec2
    type(dc_scaled_sec):: zero_sec
  continue
    result % day_seconds = diff1 % day_seconds
    if (diff1 % day == zero_sec .and. diff2 % day == zero_sec .and. &
      & diff1 % sec == zero_sec .and. diff2 % sec == zero_sec) then
      result % mon = modscl(diff1 % mon, diff2 % mon)
      result % day = zero_sec
      result % sec = zero_sec
    else if (diff1 % sec == zero_sec .and. diff2 % sec == zero_sec) then
      result % mon = zero_sec
      result % day = modscl((cyclic_mdays * diff1 % mon + diff1 % day), &
        & (cyclic_mdays * diff2 % mon + diff2 % day))
      result % sec = zero_sec
    else
      sec1 = diff1 % day_seconds * (cyclic_mdays * diff1 % mon + diff1 % day) &
        & + diff1 % sec
      sec2 = diff2 % day_seconds * (cyclic_mdays * diff2 % mon + diff2 % day) &
        & + diff2 % sec
      result % sec = modscl(sec1, sec2)
      result % day = zero_sec
      result % mon = zero_sec
      call dcdate_normalize(result % day, result % sec, result % day_seconds, result % nondim_flag)
    endif
    call dcdate_nondimcheck('dc_date#mod', diff1, diff2, result)

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