dcdatetimediv.f90 File Reference

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Functions/Subroutines
type(dc_difftime) function	dcdatetime_div_fi (diff, denominator)
	利用者定義演算子 (/) のための関数
type(dc_difftime) function	dcdatetime_div_fr (diff, denominator)
type(dc_difftime) function	dcdatetime_div_fd (diff, denominator)
real(dp) function	dcdatetime_div_ff (diff1, diff2)

Function/Subroutine Documentation

dcdatetime_div_fd()

type(dc_difftime) function dcdatetime_div_fd	(	type(dc_difftime), intent(in)	diff,
		real(dp), intent(in)	denominator
	)

DC_DIFFTIME を倍精度実数で除算

注意: 月差を除算すると近似的結果になるおそれがあります

Parameters

[in]	diff	日時差
[in]	denominator	除数 (倍精度)

Returns

result 除算結果

Definition at line 118 of file dcdatetimediv.f90.

  use dc_date_internal, only: dcdate_normalize
  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(/), &
    & modulo, int, abs, sign
  use dc_types, only: dp
  implicit none
  type(DC_DIFFTIME):: result
  type(DC_DIFFTIME), intent(in):: diff
  real(DP), intent(in):: denominator
  type(DC_SCALED_SEC):: month, day
continue
  month = int( diff % mon / denominator )
  result % mon = int(month)
  day =   int( diff % day / denominator ) &
    &   + int(cyclic_mdays * (month - result % mon))
  result % day = int(day)
  result % sec = &
    & diff % sec / denominator + (day - result % day) * diff % day_seconds
  result % day_seconds = diff % day_seconds
  result % nondim_flag = diff % nondim_flag
  call dcdate_normalize(result % day, result % sec, result % day_seconds, result % nondim_flag)

References dc_date_types::cyclic_mdays, dc_date_internal::dcdate_normalize(), and dc_types::dp.

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dcdatetime_div_ff()

real(dp) function dcdatetime_div_ff	(	type(dc_difftime), intent(in)	diff1,
		type(dc_difftime), intent(in)	diff2
	)

2つの DC_DIFFTIME を除算

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

Parameters

[in]	diff1	被除数 (日時差)
[in]	diff2	除数 (日時差)

Returns

result 除算結果 (倍精度)

Definition at line 163 of file dcdatetimediv.f90.

  use dc_date_types, only: cyclic_mdays
  use dc_scaledsec, only: dc_scaled_sec, assignment(=), &
    & operator(<), operator(>), operator(<=), operator(>=), &
    & operator(+), operator(-), operator(*), operator(/), &
    & modulo, int, abs, sign
  use dc_date_types, only: dc_datetime, dc_difftime
  use dc_types, only: dp
  implicit none
  real(DP):: result
  type(DC_DIFFTIME), intent(in):: diff1, diff2
continue
  ! ゼロ割対応コードが必要か?
  result = &
    & (diff1 % day_seconds * (cyclic_mdays * diff1 % mon + diff1 % day) &
    & + diff1 % sec) / &
    & (diff2 % day_seconds * (cyclic_mdays * diff2 % mon + diff2 % day) &
    & + diff2 % sec)

References dc_date_types::cyclic_mdays, and dc_types::dp.

dcdatetime_div_fi()

type(dc_difftime) function dcdatetime_div_fi	(	type(dc_difftime), intent(in)	diff,
		integer, intent(in)	denominator
	)

利用者定義演算子 (/) のための関数

Author

Yasuhiro MORIKAWA, Eizi TOYODA

Copyright

Copyright (C) GFD Dennou Club, 2000-2026. All rights reserved.
License is BSD-2-Clause. see COPYRIGHT in detail

Definition at line 45 of file dcdatetimediv.f90.

  use dc_date_types, only: cyclic_mdays
  use dc_scaledsec, only: dc_scaled_sec, &
    & operator(<), operator(>), operator(<=), operator(>=), &
    & operator(+), operator(-), operator(*), operator(/), &
    & modscl => mod, modulo, int, abs, sign
  use dc_date_types, only: dc_datetime, dc_difftime
  implicit none
  type(DC_DIFFTIME):: result
  type(DC_DIFFTIME), intent(in):: diff
  integer, intent(in):: denominator
continue
  result % mon = int( diff % mon / denominator )
  ! 月からの近似的繰り下がりは日単位でしか行わない
  result % day = &
    &   int( diff % day / denominator ) &
    & + int( (cyclic_mdays * modscl(diff % mon, denominator)) / denominator )
  result % sec = diff % sec / denominator + &
    & (diff % day_seconds * modscl(diff % day, denominator)) / &
    & denominator
  result % nondim_flag = diff % nondim_flag

References dc_date_types::cyclic_mdays.

dcdatetime_div_fr()

type(dc_difftime) function dcdatetime_div_fr	(	type(dc_difftime), intent(in)	diff,
		real, intent(in)	denominator
	)

DC_DIFFTIME を単精度実数で除算

注意: 月差を除算すると近似的結果になるおそれがあります

Parameters

[in]	diff	日時差
[in]	denominator	除数 (単精度)

Returns

result 除算結果

Definition at line 87 of file dcdatetimediv.f90.

  use dc_date_generic, only: operator(/)
  use dc_date_types, only: dc_datetime, dc_difftime
  use dc_types, only: dp
  implicit none
  type(DC_DIFFTIME):: result
  type(DC_DIFFTIME), intent(in):: diff
  real, intent(in):: denominator
continue
  result = diff / real(denominator, dp)

References dc_types::dp.