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NORTRIP_time_functions.f90
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!----------------------------------------------------------------------
! Various functions for manipulating time
!----------------------------------------------------------------------
!----------------------------------------------------------------------
subroutine number_to_date(date_num,date_array,ref_year)
implicit none
double precision date_num
integer ref_year
integer y,m,d,i
integer date_array(6)
double precision day_fraction
integer day_int
integer day_count,days_in_year
integer rest_seconds
integer daysinmonth(12)
data (daysinmonth(i),i=1,12) /31,28,31,30,31,30,31,31,30,31,30,31/
!Set day fraction to the nearest second. Avoiding round off errors
day_int=idint(date_num)
day_fraction=(date_num-day_int)
!Determine hours, minutes and seconds
date_array=0
rest_seconds=int(day_fraction*24.*3600.+.5) !Rounded off
date_array(4)=int(rest_seconds/3600.)
date_array(5)=int((rest_seconds/60.-date_array(4)*60.))
date_array(6)=int((rest_seconds-date_array(4)*3600.-date_array(5)*60.))
!Count up days keeping track of the year, month and day of month
!Determine year
y=ref_year-1
day_count=0
do while (day_count.le.day_int)
y=y+1
days_in_year=365
if (((mod(y,4).eq.0).and.(mod(y,100).ne.0)).or.(mod(y,400).eq.0)) days_in_year=366
day_count=day_count+days_in_year
enddo
date_array(1)=y
day_count=day_count-days_in_year
!Determine month given the year
daysinmonth(2)=28
if (((mod(date_array(1),4).eq.0).and.(mod(date_array(1),100).ne.0)).or.(mod(date_array(1),400).eq.0)) daysinmonth(2)=29
m=0
!day_count=0
do while (day_count.le.day_int)
m=m+1
day_count=day_count+daysinmonth(m)
enddo
date_array(2)=m
day_count=day_count-daysinmonth(m)
!Determine day
d=0
do while (day_count.le.day_int)
d=d+1
day_count=day_count+1
enddo
date_array(3)=d
end subroutine number_to_date
!----------------------------------------------------------------------
!----------------------------------------------------------------------
function date_to_number(a,ref_year)
implicit none
double precision date_to_number
integer ref_year
integer y,m,i
integer a(6)
integer daysinmonth(12)
data (daysinmonth(i),i=1,12) /31,28,31,30,31,30,31,31,30,31,30,31/
!ref_year=1900
date_to_number=0.
daysinmonth(2)=28
if (a(1).gt.ref_year) then
!Add up days in the year
do y=ref_year,a(1)-1
if (((mod(y,4).eq.0).and.(mod(y,100).ne.0)).or.(mod(y,400).eq.0)) then
daysinmonth(2)=29
else
daysinmonth(2)=28
endif
do m=1,12
date_to_number=date_to_number+sngl(daysinmonth(m))
end do
end do
endif
!Add up days in the remaining months
if (((mod(a(1),4).eq.0).and.(mod(a(1),100).ne.0)).or.(mod(a(1),400).eq.0)) then
daysinmonth(2)=29
else
daysinmonth(2)=28
endif
if (a(2).gt.1) then
do m=1,a(2)-1
date_to_number=date_to_number+sngl(daysinmonth(m))
enddo
endif
date_to_number=date_to_number+sngl(a(3))-1.
date_to_number=date_to_number+sngl(a(4))/24. !starts at 0
date_to_number=date_to_number+sngl(a(5))/24./60. !starts at 0
date_to_number=date_to_number+sngl(a(6))/24./60./60. !starts at 0
!write(*,*) date_to_number
end function date_to_number
!----------------------------------------------------------------------
!----------------------------------------------------------------------
function date_to_julian(a,ref_year)
implicit none
double precision date_to_number
real date_to_julian
integer a(6),b(6)
integer ref_year
b(1)=a(1)
b(2)=1
b(3)=1
b(4)=0
b(5)=0
b(6)=0
date_to_julian=date_to_number(a,ref_year)-date_to_number(b,ref_year)+1
end function date_to_julian
!----------------------------------------------------------------------
!----------------------------------------------------------------------
subroutine datestr_to_date(a_str,format_str,a)
implicit none
character(24) a_str,format_str
integer a(6)
integer pos
!based on (yyyy.mm.dd HH:MM:SS)
!extract year
pos=index(format_str,'yyyy')
if (pos.gt.0) then
read(a_str(pos:pos+3),*) a(1)
else
a(1)=0
endif
pos=index(format_str,'mm')
if (pos.gt.0) then
read(a_str(pos:pos+1),*) a(2)
else
a(2)=0
endif
pos=index(format_str,'dd')
if (pos.gt.0) then
read(a_str(pos:pos+1),*) a(3)
else
a(3)=0
endif
pos=index(format_str,'HH')
if (pos.gt.0) then
read(a_str(pos:pos+1),*) a(4)
else
a(4)=0
endif
pos=index(format_str,'MM')
if (pos.gt.0) then
read(a_str(pos:pos+1),*) a(5)
else
a(5)=0
endif
pos=index(format_str,'SS')
if (pos.gt.0) then
read(a_str(pos:pos+1),*) a(6)
else
a(6)=0
endif
end subroutine datestr_to_date
!----------------------------------------------------------------------
!----------------------------------------------------------------------
subroutine date_to_datestr(a,format_str,a_str)
implicit none
character(*) a_str,format_str
integer a(6)
integer pos
!based on (yyyy.mm.dd HH:MM:SS)
a_str=format_str
!To avoid just putting in date parts e.g. mm or dd that might occurr in a string then it is required that at least two of the date
!strings are present, i.e. yyyy, mm and dd or HH, MM and SS
if ((index(format_str,'yyyy').gt.0.and.index(format_str,'mm').gt.0).or.(index(format_str,'yyyy').gt.0.and.index(format_str,'dd').gt.0).or.(index(format_str,'dd').gt.0.and.index(format_str,'mm').gt.0).or. &
(index(format_str,'HH').gt.0.and.index(format_str,'MM').gt.0).or.(index(format_str,'HH').gt.0.and.index(format_str,'SS').gt.0).or.(index(format_str,'MM').gt.0.and.index(format_str,'SS').gt.0)) then
!Do nothing but continue with routine as this is a valid format for date string substitution
else
!Leave the routine
return
endif
!Now it only accepts the two strings 'yyyymmdd' and 'yyyymmddHH' for replacement
pos=index(format_str,'yyyymmddHH')
if (pos.gt.0) then
write(a_str(pos:pos+3),'(i4)') a(1)
if (a(2).gt.9) then
write(a_str(pos+4:pos+5),'(i2)') a(2)
else
write(a_str(pos+4:pos+5),'(a1,i1)') '0',a(2)
endif
if (a(3).gt.9) then
write(a_str(pos+6:pos+7),'(i2)') a(3)
else
write(a_str(pos+6:pos+7),'(a1,i1)') '0',a(3)
endif
if (a(4).gt.9) then
write(a_str(pos+8:pos+9),'(i2)') a(4)
else
write(a_str(pos+8:pos+9),'(a1,i1)') '0',a(4)
endif
return
else
!a_str(pos:pos+3)='0000'
endif
pos=index(format_str,'yyyymmdd')
if (pos.gt.0) then
write(a_str(pos:pos+3),'(i4)') a(1)
if (a(2).gt.9) then
write(a_str(pos+4:pos+5),'(i2)') a(2)
else
write(a_str(pos+4:pos+5),'(a1,i1)') '0',a(2)
endif
if (a(3).gt.9) then
write(a_str(pos+6:pos+7),'(i2)') a(3)
else
write(a_str(pos+6:pos+7),'(a1,i1)') '0',a(3)
endif
return
else
!a_str(pos:pos+3)='0000'
endif
!return
!Do not do the rest
!extract year
pos=index(format_str,'yyyy')
if (pos.gt.0) then
write(a_str(pos:pos+3),'(i4)') a(1)
else
!a_str(pos:pos+3)='0000'
endif
pos=index(format_str,'mm')
if (pos.gt.0) then
if (a(2).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(2)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(2)
endif
else
!a_str(pos:pos+1)='00'
endif
pos=index(format_str,'dd')
if (pos.gt.0) then
if (a(3).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(3)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(3)
endif
else
!a_str(pos:pos+1)='00'
endif
pos=index(format_str,'HH')
if (pos.gt.0) then
if (a(4).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(4)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(4)
endif
else
!a_str(pos:pos+1)='00'
endif
pos=index(format_str,'MM')
if (pos.gt.0) then
if (a(5).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(5)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(5)
endif
else
!a_str(pos:pos+1)='00'
endif
pos=index(format_str,'SS')
if (pos.gt.0) then
if (a(6).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(6)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(6)
endif
else
!a_str(pos:pos+1)='00'
endif
end subroutine date_to_datestr
!----------------------------------------------------------------------
!----------------------------------------------------------------------
subroutine date_to_datestr_bracket(a,in_format_str,out_a_str)
implicit none
character(*), intent(out) :: out_a_str
character(*), intent(in) :: in_format_str
integer, intent(in) :: a(6)
character(256) format_str,a_str
integer pos
integer pos1,pos2
!based on (yyyy.mm.dd HH:MM:SS)
!a_str=format_str
!To avoid just putting in date parts e.g. mm or dd that might occurr in a string then it is required that at least two of the date
!strings are present, i.e. yyyy, mm and dd or HH, MM and SS
!Only changes dates when they are inside '<.....>'
!Removes these once changed
pos1=index(in_format_str,'<')
pos2=index(in_format_str,'>')
if (pos1.le.0.or.pos2.le.0.or.pos1+1.gt.pos2-1) then
out_a_str=in_format_str
return
endif
!Reassign format_str to be just the text between <..>
format_str=in_format_str(pos1+1:pos2-1)
a_str=format_str
!extract year
pos=index(format_str,'yyyy')
if (pos.gt.0) then
write(a_str(pos:pos+3),'(i4)') a(1)
endif
pos=index(format_str,'mm')
if (pos.gt.0) then
if (a(2).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(2)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(2)
endif
endif
pos=index(format_str,'dd')
if (pos.gt.0) then
if (a(3).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(3)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(3)
endif
endif
pos=index(format_str,'HH')
if (pos.gt.0) then
if (a(4).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(4)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(4)
endif
endif
pos=index(format_str,'MM')
if (pos.gt.0) then
if (a(5).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(5)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(5)
endif
endif
pos=index(format_str,'SS')
if (pos.gt.0) then
if (a(6).gt.9) then
write(a_str(pos:pos+1),'(i2)') a(6)
else
write(a_str(pos:pos+1),'(a1,i1)') '0',a(6)
endif
endif
!insert the a_str into out_a_str, removing the '<>' text
if (len_trim(in_format_str).gt.pos2) then
out_a_str=in_format_str(1:pos1-1)//trim(a_str)//in_format_str(pos2+1:)
else
out_a_str=in_format_str(1:pos1-1)//trim(a_str)
endif
!write(*,*) trim(in_format_str),trim(out_a_str)
!stop
end subroutine date_to_datestr_bracket
!----------------------------------------------------------------------
!----------------------------------------------------------------------
subroutine num_to_numstr_squarebracket(a,in_format_str,out_a_str)
implicit none
character(*), intent(out) :: out_a_str
character(*), intent(in) :: in_format_str
integer, intent(in) :: a
character(256) format_str,a_str
integer pos
integer pos1,pos2
!Replaces 'num' inbetween brackets with a 3 digit number. Used for NORA3 reading
!Only changes dates when they are inside '<.....>'
!Removes these once changed
pos1=index(in_format_str,'[')
pos2=index(in_format_str,']')
if (pos1.le.0.or.pos2.le.0.or.pos1+1.gt.pos2-1) then
out_a_str=in_format_str
return
endif
!Reassign format_str to be just the text between <..>
format_str=in_format_str(pos1+1:pos2-1)
a_str=format_str
pos=index(format_str,'num')
if (pos.gt.0) then
if (a.gt.99) then
write(a_str(pos:pos+2),'(i3)') a
elseif (a.gt.9) then
write(a_str(pos:pos+2),'(a1,i2)') '0',a
else
write(a_str(pos:pos+2),'(a2,i1)') '00',a
endif
endif
!insert the a_str into out_a_str, removing the '<>' text
if (len_trim(in_format_str).gt.pos2) then
out_a_str=in_format_str(1:pos1-1)//trim(a_str)//in_format_str(pos2+1:)
else
out_a_str=in_format_str(1:pos1-1)//trim(a_str)
endif
!write(*,*) trim(in_format_str),trim(out_a_str)
!stop
end subroutine num_to_numstr_squarebracket
!----------------------------------------------------------------------
!----------------------------------------------------------------------
function day_of_week (a)
!Adapted from EPISODE code
implicit none
!The subroutine calculates the day of week given current datetime,
!where DAYW = 1 corresponds to Monday and DAYW = 7 to Sunday. The
!algorithm is based on the tables in "Hvem Hva Hvor 1971" (p. 121)
!and is valid for all years from 1800 to infinity!
!USE mod_time
! Local variables
INTEGER JM(12)
INTEGER IR
INTEGER JC
INTEGER NT
INTEGER JK
INTEGER J4
INTEGER J100
INTEGER J400
LOGICAL LEAP
! JM - Column number for each month
! IR - Row in HHH table for day of month
! JC - Column in HHH table for month
! NT - Number in HHH table for row IR and column JC
! JK - Column in HHH table for year
! J4 - Adjustment value for leap year
! J100 - Adjustment value for leap year
! J400 - Adjustment value for leap year
! LEAP - If leap year then true else false
integer DAYM,MNTH,YEAR
integer day_of_week
integer a(6)
DAYM=a(3)
MNTH=a(2)
YEAR=a(1)
!Calculate leap year or not
LEAP = .FALSE.
IF (MOD(YEAR, 4) .EQ. 0 .AND. .NOT. (MOD(YEAR,100) .EQ. 0 .AND. MOD(YEAR,400) .NE. 0)) LEAP = .TRUE.
! Set data in table JM
DATA JM/1,5,5,2,7,4,2,6,3,1,5,3/
! Calculate row number for day of month
IR = MOD(DAYM - 1,7) + 1
! Calculate column number for month
JC = JM(MNTH)
IF (LEAP .AND. (MNTH .EQ. 1 .OR. MNTH .EQ. 2)) JC = JC + 1
! Calculate "number" in HHH table with row IR and column JC
NT = MOD(IR + 7 - JC,7) + 1
! Calculate column number for year (adjusting for leap years)
J4 = (YEAR - 1800)/4
J100 = (YEAR - 1800)/100
J400 = (YEAR - 1600)/400
JK = MOD(YEAR - 1800 + J4 - J100 + J400 + 3 - 1,7) + 1
! Calculate day of week
day_of_week = MOD(JK - 1 + NT - 1,7) + 1
RETURN
! End of subroutine CDAYW
end function day_of_week
!----------------------------------------------------------------------
!----------------------------------------------------------------------
function summer_time_europe(a_in)
implicit none
logical summer_time_europe
integer a(6),a_in(6)
integer b_start(6),b_end(6)
integer ref_year
integer year
double precision datenum_start,datenum_end,datenum
double precision date_to_number
a=a_in
ref_year=2000
b_start=0
b_end=0
year=a(1)
b_start(1)=a(1)
b_start(2)=3
b_start(3)=(31 - mod((((5 * year)/4) + 4),7))
b_start(4)=1
b_end(1)=a(1)
b_end(2)=10
b_end(3)=(31 - mod((((5 * year)/4) + 1),7))
b_end(4)=1
datenum_start=date_to_number(b_start,ref_year)
datenum_end=date_to_number(b_end,ref_year)
datenum=date_to_number(a,ref_year)
summer_time_europe=.false.
if (datenum.ge.datenum_start.and.datenum.lt.datenum_end) summer_time_europe=.true.
!write(*,'(6i6)') a
!write(*,'(6i6)') b_start
!write(*,'(6i6)') b_end
!write(*,*) summer_time_europe
!write(*,*) datenum_start,datenum_end,datenum
end function summer_time_europe
!----------------------------------------------------------------------