dcdatetimesub.f90 File Reference

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Functions/Subroutines
type(dc_datetime) function	dcdatetime_sub_tf (time, diff)
	Functions for user defined operation (-).
type(dc_difftime) function	dcdatetime_sub_tt (time1, time2)
type(dc_difftime) function	dcdatetime_sub_ff (diff1, diff2)
type(dc_difftime) function	dcdatetime_sub_fd (diff, sec)
type(dc_difftime) function	dcdatetime_sub_fr (diff, sec)
type(dc_difftime) function	dcdatetime_sub_fi (diff, sec)

Function/Subroutine Documentation

dcdatetime_sub_fd()

type(dc_difftime) function dcdatetime_sub_fd	(	type(dc_difftime), intent(in)	diff,
		real(dp), intent(in)	sec )

Subtract double precision from DC_DIFFTIME

Subtract a double precision seconds value from a time difference.

Parameters

[in]	diff	Time difference (minuend)
[in]	sec	Seconds to subtract (double precision)

Returns

Result of subtraction

Definition at line 164 of file dcdatetimesub.f90.

 
  use dc_date_internal, only: dcdate_normalize
  use dc_date_types, only: dc_datetime, dc_difftime
  use dc_scaledsec, only: operator(-)
  use dc_types, only: dp
  implicit none
  type(DC_DIFFTIME):: result
  type(DC_DIFFTIME), intent(in):: diff
  real(DP), intent(in):: sec
continue
  result % mon = diff % mon
  result % day = diff % day
  result % sec = diff % sec - sec
  result % day_seconds = diff % day_seconds
  call dcdate_normalize(result % day, result % sec, result % day_seconds, result % nondim_flag)

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

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dcdatetime_sub_ff()

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

Subtract two DC_DIFFTIME values

Subtract one time difference from another.

Parameters

[in]	diff1	First time difference (minuend)
[in]	diff2	Second time difference (subtrahend)

Returns

Result of subtraction

Definition at line 128 of file dcdatetimesub.f90.

 
  use dc_date_internal, only: dcdate_normalize, dcdate_nondimcheck
  use dc_date_types, only: dc_datetime, dc_difftime
  use dc_scaledsec, only: operator(-)
  implicit none
  type(DC_DIFFTIME):: result
  type(DC_DIFFTIME), intent(in):: diff1, diff2
continue
  result % mon = diff1 % mon - diff2 % mon
  result % day = diff1 % day - diff2 % day
  result % sec = diff1 % sec - diff2 % sec
  result % day_seconds = diff1 % day_seconds
  call dcdate_nondimcheck('dc_date#operator(-)', diff1, diff2, result)
  call dcdate_normalize(result % day, result % sec, result % day_seconds, result % nondim_flag)

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

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dcdatetime_sub_fi()

type(dc_difftime) function dcdatetime_sub_fi	(	type(dc_difftime), intent(in)	diff,
		integer, intent(in)	sec )

Subtract integer from DC_DIFFTIME

Subtract an integer seconds value from a time difference.

Parameters

[in]	diff	Time difference (minuend)
[in]	sec	Seconds to subtract (integer)

Returns

Result of subtraction

Definition at line 234 of file dcdatetimesub.f90.

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

References dc_types::dp.

dcdatetime_sub_fr()

type(dc_difftime) function dcdatetime_sub_fr	(	type(dc_difftime), intent(in)	diff,
		real, intent(in)	sec )

Subtract single precision from DC_DIFFTIME

Subtract a single precision seconds value from a time difference.

Parameters

[in]	diff	Time difference (minuend)
[in]	sec	Seconds to subtract (single precision)

Returns

Result of subtraction

Definition at line 201 of file dcdatetimesub.f90.

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

References dc_types::dp.

dcdatetime_sub_tf()

type(dc_datetime) function dcdatetime_sub_tf	(	type(dc_datetime), intent(in)	time,
		type(dc_difftime), intent(in)	diff )

Functions for user defined operation (-).

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

This file contains implementation procedures of subtraction for dc_date_types#DC_DATETIME and dc_date_types#DC_DIFFTIME.

Subtract DC_DIFFTIME from DC_DATETIME

Subtract a time difference from a datetime.

Parameters

[in]	time	Datetime to subtract from
[in]	diff	Time difference to subtract

Returns

Result of subtraction

Definition at line 43 of file dcdatetimesub.f90.

 
  use dc_date_generic, only: eval, dcdatetimecreate
  use dc_date_types, only: dc_datetime, dc_difftime
  use dc_scaledsec, only: dc_scaled_sec, &
    & operator(<), operator(>), operator(<=), operator(>=), &
    & operator(+), operator(-), operator(*), operator(/), &
    & modulo, int, abs, sign
  implicit none
  type(DC_DATETIME):: result
  type(DC_DATETIME), intent(in):: time
  type(DC_DIFFTIME), intent(in):: diff
  type(DC_SCALED_SEC):: time_year, time_mon, time_day, time_sec
  integer:: time_caltype
  character(6):: time_zone
continue
  call eval(time, &
    & sclyear = time_year, sclmon = time_mon, sclday = time_day, &
    & sclsec = time_sec, caltype = time_caltype, zone = time_zone )
  call dcdatetimecreate(result, &
    & sclyear = time_year, &
    & sclmon = time_mon - diff % mon, &
    & sclday = time_day - diff % day, &
    & sclsec = time_sec - diff % sec, &
    & caltype = time_caltype, zone = time_zone)

References dc_date_types::caltype.

dcdatetime_sub_tt()

type(dc_difftime) function dcdatetime_sub_tt	(	type(dc_datetime), intent(in)	time1,
		type(dc_datetime), intent(in)	time2 )

Subtract two DC_DATETIME values

Subtract one datetime from another and return the difference.

Parameters

[in]	time1	First datetime (minuend)
[in]	time2	Second datetime (subtrahend)

Returns

Time difference between time1 and time2

Definition at line 89 of file dcdatetimesub.f90.

 
  use dc_date_generic, only: evalsclsec, zonetodiff, operator(-)
  use dc_date_types, only: dc_datetime, dc_difftime
  use dc_date_internal, only: dcdate_normalize
  use dc_scaledsec, only: dc_scaled_sec, &
    & operator(<), operator(>), operator(<=), operator(>=), &
    & operator(+), operator(-), operator(*), operator(/), &
    & modulo, int, abs, sign
  implicit none
  type(DC_DIFFTIME):: result
  type(DC_DATETIME), intent(in):: time1, time2
continue
  result % day = time1 % day - time2 % day
  result % sec = time1 % sec - time2 % sec &
    & + evalsclsec(zonetodiff(time1 % zone) - zonetodiff(time2 % zone))
  result % day_seconds = time1 % day_seconds
  call dcdate_normalize(result % day, result % sec, result % day_seconds, result % nondim_flag)

References dc_date_internal::dcdate_normalize().

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