dcdatetimelt.f90 File Reference

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Functions/Subroutines
logical function	dcdatetime_lt_tt (time1, time2)
	Functions for user defined operation (<).
logical function	dcdatetime_lt_ff (diff1, diff2)
logical function	dcdatetime_lt_fi (diff, factor)
logical function	dcdatetime_lt_if (factor, diff)

Function/Subroutine Documentation

dcdatetime_lt_ff()

logical function dcdatetime_lt_ff	(	type(dc_difftime), intent(in)	diff1,
		type(dc_difftime), intent(in)	diff2 )

Compare two DC_DIFFTIME variables (<)

Compare two time difference values. Returns .true. if the time difference stored in the second argument is greater than the time difference stored in the first argument.

Parameters

[in]	diff1	First time difference to compare
[in]	diff2	Second time difference to compare

Returns

.true. if diff1 < diff2, .false. otherwise

Definition at line 98 of file dcdatetimelt.f90.

 
  use dc_date_generic, only: evalsec
  use dc_date_types, only: dc_datetime, dc_difftime
  use dc_scaledsec, only: &
    & operator(<), operator(>), operator(<=), operator(>=), operator(==)
  implicit none
  type(DC_DIFFTIME), intent(in):: diff1, diff2
continue
  if ( diff1 % day_seconds == diff2 % day_seconds ) then
 
    if ( diff1 % mon < diff2 % mon ) then
      result = .true.  ; return
    elseif ( diff1 % mon > diff2 % mon ) then
      result = .false. ; return
    end if
    if ( diff1 % day < diff2 % day ) then
      result = .true.  ; return
    elseif ( diff1 % day > diff2 % day ) then
      result = .false. ; return
    end if
    if ( diff1 % sec < diff2 % sec ) then
      result = .true.  ; return
    elseif ( diff1 % sec > diff2 % sec ) then
      result = .false. ; return
    end if
    result = .false.
  else
 
    if (evalsec(diff1) < evalsec(diff2)) then
      result = .true.
    else
      result = .false.
    end if
  end if
 

dcdatetime_lt_fi()

logical function dcdatetime_lt_fi	(	type(dc_difftime), intent(in)	diff,
		integer, intent(in)	factor )

Compare DC_DIFFTIME with integer (<)

Compare a time difference value with an integer. Returns .true. if the time difference stored in the first argument is less than the integer stored in the second argument.

Parameters

[in]	diff	Time difference to compare
[in]	factor	Integer value to compare

Returns

.true. if diff < factor, .false. otherwise

Definition at line 159 of file dcdatetimelt.f90.

 
  use dc_date_generic, only: evalsec
  use dc_date_types, only: dc_datetime, dc_difftime
  implicit none
  type(DC_DIFFTIME), intent(in):: diff
  integer, intent(in):: factor
continue
  result = evalsec(diff) < factor

dcdatetime_lt_if()

logical function dcdatetime_lt_if	(	integer, intent(in)	factor,
		type(dc_difftime), intent(in)	diff )

Compare integer with DC_DIFFTIME (<)

Compare an integer with a time difference value. Returns .true. if the integer stored in the first argument is less than the time difference stored in the second argument.

Parameters

[in]	factor	Integer value to compare
[in]	diff	Time difference to compare

Returns

.true. if factor < diff, .false. otherwise

Definition at line 193 of file dcdatetimelt.f90.

 
  use dc_date_generic, only: evalsec
  use dc_date_types, only: dc_datetime, dc_difftime
  implicit none
  integer, intent(in):: factor
  type(DC_DIFFTIME), intent(in):: diff
continue
  result = factor < evalsec(diff)

dcdatetime_lt_tt()

logical function dcdatetime_lt_tt	(	type(dc_datetime), intent(in)	time1,
		type(dc_datetime), intent(in)	time2 )

Functions for user defined operation (<).

Author

Yasuhiro MORIKAWA

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 less-than comparison for dc_date_types#DC_DATETIME and dc_date_types#DC_DIFFTIME.

Compare two DC_DATETIME variables (<)

Compare two datetime values. Returns .true. if the datetime stored in the second argument is later than the datetime stored in the first argument.

Parameters

[in]	time1	First datetime to compare
[in]	time2	Second datetime to compare

Returns

.true. if time1 < time2, .false. otherwise

Definition at line 47 of file dcdatetimelt.f90.

 
  use dc_date_generic, only: eval, evalsclsec, zonetodiff
  use dc_date_types, only: dc_datetime, dc_difftime
  use dc_scaledsec, only: dc_scaled_sec, &
    & operator(==), operator(<), operator(>), operator(<=), operator(>=), &
    & operator(+)
  implicit none
  type(DC_DATETIME), intent(in):: time1, time2
  type(DC_SCALED_SEC):: year1, year2, time1_sec, time2_sec
continue
  call eval(time1, sclyear=year1)
  call eval(time2, sclyear=year2)
  if (year1 < year2) then
    result = .true.
  elseif (year1 > year2) then
    result = .false.
  else
    time1_sec = evalsclsec(time1) + evalsclsec(zonetodiff(time1 % zone))
    time2_sec = evalsclsec(time2) + evalsclsec(zonetodiff(time2 % zone))
    if (time1_sec < time2_sec) then
      result = .true.
    else
      result = .false.
    end if
  end if