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S3M_Module_Tools_Time.f90
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S3M_Module_Tools_Time.f90
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!------------------------------------------------------------------------------------------
! File: S3M_Module_Tools_Time.f90
! Author(s): Fabio Delogu.
!
! Created on March 24, 2014, 1:25 PM
!
! Module to define time information
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Module header
module S3M_Module_Tools_Time
!------------------------------------------------------------------------------------------
! Implicit none for all subroutines in this module
implicit none
!------------------------------------------------------------------------------------------
contains
!------------------------------------------------------------------------------------------
! Subroutine to convert string time to integer time
subroutine S3M_Tools_Time_DateDiff(sTime, sTimeRef, dTimeSeconds_Diff, dTimeHours_Diff)
!------------------------------------------------------------------------------------------
! Variable(s) declaration
character(len = 19) :: sTime
character(len = 19), optional :: sTimeRef
integer(kind = 4) :: iTimeJD_Ref, iTimeJD, iTimeJD_Diff
integer(kind = 4) :: iYear, iMonth, iDay, iHour, iMins
integer(kind = 4) :: iYear_Ref, iMonth_Ref, iDay_Ref, iHour_Ref, iMins_Ref
integer(kind = 8) :: iTimeSeconds_Diff
real(kind = 8) :: dTimeHours_Diff, dTimeSeconds_Diff
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Initialize variable(s)
if(.not. present(sTimeRef)) sTimeRef = '1970-01-01_00:00:00' ! default value
iYear = 0; iMonth = 0; iDay = 0; iHour = 0; iMins = 0;
iYear_Ref = 0; iMonth_Ref = 0; iDay_Ref = 0; iHour_Ref = 0; iMins_Ref = 0;
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Convert string date to int date
call S3M_Tools_Time_Str2Int(sTimeRef, iYear_Ref, iMonth_Ref, iDay_Ref, iHour_Ref, iMins_Ref)
call S3M_Tools_Time_Str2Int(sTime, iYear, iMonth, iDay, iHour, iMins)
! Compute JulianDay
iTimeJD_Ref = S3M_Tools_Time_JD(iYear_Ref, iMonth_Ref, iDay_Ref)
iTimeJD = S3M_Tools_Time_JD(iYear, iMonth, iDay)
! Compute difference between days
iTimeJD_Diff = iTimeJD - iTimeJD_Ref
! Compute difference in seconds
iTimeSeconds_Diff = int8(int8(iTimeJD_Diff) * 86400 + iHour * 3600 + (iMins / 60) * 3600)
dTimeSeconds_Diff = real(iTimeSeconds_Diff, 8)
! Compute difference in hours
dTimeHours_Diff = real(iTimeSeconds_Diff, 8) / 3600.0
!------------------------------------------------------------------------------------------
end subroutine S3M_Tools_Time_DateDiff
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Subroutine to convert string time to integer time
subroutine S3M_Tools_Time_Str2Int(sTime, iYear, iMonth, iDay, iHour, iMins)
character(len = 19) :: sTime
integer(kind = 4) :: iYear, iMonth, iDay, iHour, iMins
read (sTime(1:4),'(I10)') iYear
read (sTime(6:7),'(I10)') iMonth
read (sTime(9:10),'(I10)') iDay
read (sTime(12:13),'(I10)') iHour
read (sTime(15:16),'(I10)') iMins
end subroutine S3M_Tools_Time_Str2Int
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Function to compute julian day
function S3M_Tools_Time_JD(yyyy, mm, dd) result (julian)
! converts calendar date to Julian date
! cf Fliegel & Van Flandern, CACM 11(10):657, 1968
! example: julian_date(1970,1,1) = 2440588
integer, intent(in) :: yyyy,mm,dd
integer :: julian
julian = dd-32075+1461*(yyyy+4800+(mm-14)/12)/4 + &
367*(mm-2-((mm-14)/12)*12)/12- &
3*((yyyy + 4900 + (mm - 14)/12)/100)/4
end function S3M_Tools_Time_JD
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Subroutine to get time now
subroutine S3M_Tools_Time_Printer(sPrintDate, sPrintTime)
!------------------------------------------------------------------------------------------
! Variable(s) declaration
character (len=8) :: sCurrenteDate
character (len=10) :: sCurrentTime
character (len=10), intent(out) :: sPrintDate
character (len=12), intent(out) :: sPrintTime
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Initialize variable(s)
sCurrenteDate = ""; sCurrentTime = "";
sPrintDate = ""; sPrintTime = ""
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Get date and time
call date_and_time(date=sCurrenteDate, time=sCurrentTime)
write(sPrintDate,'(a10)') sCurrenteDate(1:4)//'-'//sCurrenteDate(5:6)//'-'//sCurrenteDate(7:8)
write(sPrintTime,'(a12)') sCurrentTime(1:2)//':'//sCurrentTime(3:4)//':'//sCurrentTime(5:10)
!------------------------------------------------------------------------------------------
end subroutine S3M_Tools_Time_Printer
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Subroutine to define monthly value
subroutine S3M_Tools_Time_MonthVal(a12, nowdate, nowval)
!
! Given a set of 12 values, taken to be valid on the fifteenth of each month (Jan through Dec)
! and a date in the form <YYYYMMDD[HHmmss]> ....
!
! Return a value valid for the day given in <nowdate>, as an interpolation from the 12
! monthly values.
!
implicit none
real(kind=4), dimension(12), intent(in) :: a12 ! 12 monthly values, taken to be valid on the 15th of
! ! the month
character(len=12), intent(in) :: nowdate ! Date, in the form <YYYYMMDD[HHmmss]>
integer(kind = 4) :: nowy, nowm, nowd
integer(kind = 4) :: prevm, postm
real(kind=4) :: factor
integer(kind = 4), dimension(12) :: ndays = (/ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 /)
real(kind = 4) :: nowval
integer, external :: nfeb
!
! Handle leap year by setting the number of days in February for the year in question.
!
read(nowdate(1:8),'(I4,I2,I2)') nowy, nowm, nowd
ndays(2) = nfeb_yw(nowy)
!
! Do interpolation between the fifteenth of two successive months.
!
if (nowd == 15) then
nowval = a12(nowm)
return
else if (nowd < 15) then
postm = nowm
prevm = nowm - 1
if (prevm == 0) prevm = 12
factor = real(ndays(prevm)-15+nowd)/real(ndays(prevm))
else if (nowd > 15) then
prevm = nowm
postm = nowm + 1
if (postm == 13) postm = 1
factor = real(nowd-15)/real(ndays(prevm))
endif
nowval = a12(prevm)*(1.0-factor) + a12(postm)*factor
end subroutine S3M_Tools_Time_MonthVal
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Function for sweeping blanks
character(30) function sweep_blanks(in_str)
character(*), intent(in) :: in_str
character(30) :: out_str
character :: ch
integer :: j
out_str = " "
do j=1, len_trim(in_str)
! get j-th char
ch = in_str(j:j)
if (ch .ne. " ") then
out_str = trim(out_str) // ch
endif
sweep_blanks = trim((out_str))
end do
end function sweep_blanks
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Function for computing the number of days in February (given year)
integer function nfeb_yw(year)
!------------------------------------------------------------------------------------------
implicit none
integer, intent(in) :: year ! Four-digit year
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Testing given year and select number of days
nfeb_yw = 28 ! By default, February has 28 days ...
if (mod(year,4).eq.0) then
nfeb_yw = 29 ! But every four years, it has 29 days ...
if (mod(year,100).eq.0) then
nfeb_yw = 28 ! Except every 100 years, when it has 28 days ...
if (mod(year,400).eq.0) then
nfeb_yw = 29 ! Except every 400 years, when it has 29 days ...
if (mod(year,3600).eq.0) then
nfeb_yw = 28 ! Except every 3600 years, when it has 28 days.
endif
endif
endif
endif
!------------------------------------------------------------------------------------------
end function nfeb_yw
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Subroutine geth_newdate
subroutine S3M_Tools_Time_GetNewDate (ndate, odate, idt)
!------------------------------------------------------------------------------------------
! Implicit none and external libraries
implicit none
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! From old date ("YYYY-MM-DD HH:MM:SS.ffff" or "YYYYMMDDHHMMSSffff") and
! delta-time, compute the new date.
! on entry - odate - the old hdate.
! idt - the change in time
! on exit - ndate - the new hdate.
integer, intent(in) :: idt
character (len= 19), intent(inout) :: odate
character (len= 19), intent(out) :: ndate
! Local Variables
! yrold - indicates the year associated with "odate"
! moold - indicates the month associated with "odate"
! dyold - indicates the day associated with "odate"
! hrold - indicates the hour associated with "odate"
! miold - indicates the minute associated with "odate"
! scold - indicates the second associated with "odate"
! yrnew - indicates the year associated with "ndate"
! monew - indicates the month associated with "ndate"
! dynew - indicates the day associated with "ndate"
! hrnew - indicates the hour associated with "ndate"
! minew - indicates the minute associated with "ndate"
! scnew - indicates the second associated with "ndate"
! mday - a list assigning the number of days in each month
! i - loop counter
! nday - the integer number of days represented by "idt"
! nhour - the integer number of hours in "idt" after taking out
! all the whole days
! nmin - the integer number of minutes in "idt" after taking out
! all the whole days and whole hours.
! nsec - the integer number of minutes in "idt" after taking out
! all the whole days, whole hours, and whole minutes.
integer :: newlen, oldlen
integer :: yrnew, monew, dynew, hrnew, minew, scnew, frnew
integer :: yrold, moold, dyold, hrold, miold, scold, frold
integer :: nday, nhour, nmin, nsec, nfrac, i, ifrc
logical :: opass
character (len=10) :: hfrc
character (len=1) :: sp
logical :: punct
integer :: yrstart, yrend, mostart, moend, dystart, dyend
integer :: hrstart, hrend, mistart, miend, scstart, scend, frstart
integer :: units
integer, dimension(12) :: mday = (/31,28,31,30,31,30,31,31,30,31,30,31/)
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Determine if odate is "YYYY-MM-DD_HH ... " or "YYYYMMDDHH...."
if (odate(5:5) == "-") then
punct = .TRUE.
else
punct = .FALSE.
endif
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Break down old hdate into parts
hrold = 0
miold = 0
scold = 0
frold = 0
oldlen = LEN((odate))
if (punct) then
yrstart = 1
yrend = 4
mostart = 6
moend = 7
dystart = 9
dyend = 10
hrstart = 12
hrend = 13
mistart = 15
miend = 16
scstart = 18
scend = 19
frstart = 21
select case (oldlen)
case (10)
! Days
units = 1
case (13)
! Hours
units = 2
case (16)
! Minutes
units = 3
case (19)
! Seconds
units = 4
case (21)
! Tenths
units = 5
case (22)
! Hundredths
units = 6
case (23)
! Thousandths
units = 7
case (24)
! Ten thousandths
units = 8
case default
write(*,*) 'ERROR: geth_newdate: odd length: #'//trim(odate)//'#'
stop
end select
if (oldlen.ge.11) then
sp = odate(11:11)
else
sp = ' '
end if
else
yrstart = 1
yrend = 4
mostart = 5
moend = 6
dystart = 7
dyend = 8
hrstart = 9
hrend = 10
mistart = 11
miend = 12
scstart = 13
scend = 14
frstart = 15
select case (oldlen)
case (8)
! Days
units = 1
case (10)
! Hours
units = 2
case (12)
! Minutes
units = 3
case (14)
! Seconds
units = 4
case (15)
! Tenths
units = 5
case (16)
! Hundredths
units = 6
case (17)
! Thousandths
units = 7
case (18)
! Ten thousandths
units = 8
case default
write(*,*) 'ERROR: geth_newdate: odd length: #'//trim(odate)//'#'
stop
end select
endif
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Use internal READ statements to convert the CHARACTER string
! date into INTEGER components.
read(odate(yrstart:yrend), '(i4)') yrold
read(odate(mostart:moend), '(i2)') moold
read(odate(dystart:dyend), '(i2)') dyold
if (units.ge.2) then
read(odate(hrstart:hrend),'(i2)') hrold
if (units.ge.3) then
read(odate(mistart:miend),'(i2)') miold
if (units.ge.4) then
read(odate(scstart:scend),'(i2)') scold
if (units.ge.5) then
read(odate(frstart:oldlen),*) frold
end if
end if
end if
end if
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Set the number of days in February for that year.
mday(2) = nfeb_yw(yrold)
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Check that ODATE makes sense.
opass = .TRUE.
! Check that the month of ODATE makes sense.
if ((moold.gt.12).or.(moold.lt.1)) then
write(*,*) 'GETH_NEWDATE: Month of ODATE = ', moold
opass = .FALSE.
end if
! Check that the day of ODATE makes sense.
if ((dyold.gt.mday(moold)).or.(dyold.lt.1)) then
write(*,*) 'GETH_NEWDATE: Day of ODATE = ', dyold
opass = .FALSE.
end if
! Check that the hour of ODATE makes sense.
if ((hrold.gt.23).or.(hrold.lt.0)) then
write(*,*) 'GETH_NEWDATE: Hour of ODATE = ', hrold
opass = .FALSE.
end if
! Check that the minute of ODATE makes sense.
if ((miold.gt.59).or.(miold.lt.0)) then
write(*,*) 'GETH_NEWDATE: Minute of ODATE = ', miold
opass = .FALSE.
end if
! Check that the second of ODATE makes sense.
if ((scold.gt.59).or.(scold.lt.0)) then
write(*,*) 'GETH_NEWDATE: Second of ODATE = ', scold
opass = .FALSE.
end if
! Check that the fractional part of ODATE makes sense.
if (.not.opass) then
write(*,*) 'Crazy ODATE: ', odate(1:oldlen), oldlen
stop
end if
! --> Date Checks are completed. Continue.
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Compute the number of days, hours, minutes, and seconds in idt
if (units.ge.5) then !idt should be in fractions of seconds
ifrc = oldlen-(frstart)+1
ifrc = 10**ifrc
nday = abs(idt)/(86400*ifrc)
nhour = mod(abs(idt),86400*ifrc)/(3600*ifrc)
nmin = mod(abs(idt),3600*ifrc)/(60*ifrc)
nsec = mod(abs(idt),60*ifrc)/(ifrc)
nfrac = mod(abs(idt), ifrc)
else if (units.eq.4) then !idt should be in seconds
ifrc = 1
nday = abs(idt)/86400 ! integer number of days in delta-time
nhour = mod(abs(idt),86400)/3600
nmin = mod(abs(idt),3600)/60
nsec = mod(abs(idt),60)
nfrac = 0
else if (units.eq.3) then !idt should be in minutes
ifrc = 1
nday = abs(idt)/1440 ! integer number of days in delta-time
nhour = mod(abs(idt),1440)/60
nmin = mod(abs(idt),60)
nsec = 0
nfrac = 0
else if (units.eq.2) then !idt should be in hours
ifrc = 1
nday = abs(idt)/24 ! integer number of days in delta-time
nhour = mod(abs(idt),24)
nmin = 0
nsec = 0
nfrac = 0
else if (units.eq.1) then !idt should be in days
ifrc = 1
nday = abs(idt) ! integer number of days in delta-time
nhour = 0
nmin = 0
nsec = 0
nfrac = 0
else
write(*,'(''GETH_NEWDATE: Strange length for ODATE: '', i3)') &
oldlen
write(*,*) '#'//odate(1:oldlen)//'#'
stop
end if
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
if (idt.ge.0) then
frnew = frold + nfrac
if (frnew.ge.ifrc) then
frnew = frnew - ifrc
nsec = nsec + 1
end if
scnew = scold + nsec
if (scnew .ge. 60) then
scnew = scnew - 60
nmin = nmin + 1
end if
minew = miold + nmin
if (minew .ge. 60) then
minew = minew - 60
nhour = nhour + 1
end if
hrnew = hrold + nhour
if (hrnew .ge. 24) then
hrnew = hrnew - 24
nday = nday + 1
end if
dynew = dyold
monew = moold
yrnew = yrold
do i = 1, nday
dynew = dynew + 1
if (dynew.gt.mday(monew)) then
dynew = dynew - mday(monew)
monew = monew + 1
if (monew .gt. 12) then
monew = 1
yrnew = yrnew + 1
! If the year changes, recompute the number of days in February
mday(2) = nfeb_yw(yrnew)
end if
end if
end do
else if (idt.lt.0) then
frnew = frold - nfrac
if (frnew .lt. 0) then
frnew = frnew + ifrc
nsec = nsec + 1
end if
scnew = scold - nsec
if (scnew .lt. 00) then
scnew = scnew + 60
nmin = nmin + 1
end if
minew = miold - nmin
if (minew .lt. 00) then
minew = minew + 60
nhour = nhour + 1
end if
hrnew = hrold - nhour
if (hrnew .lt. 00) then
hrnew = hrnew + 24
nday = nday + 1
end if
dynew = dyold
monew = moold
yrnew = yrold
do i = 1, nday
dynew = dynew - 1
if (dynew.eq.0) then
monew = monew - 1
if (monew.eq.0) then
monew = 12
yrnew = yrnew - 1
! If the year changes, recompute the number of days in February
mday(2) = nfeb_yw(yrnew)
end if
dynew = mday(monew)
end if
end do
end if
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
! Now construct the new mdate
newlen = LEN((ndate))
if (punct) then
if (newlen.gt.frstart) then
write(ndate(1:scend),19) yrnew, monew, dynew, hrnew, minew, scnew
write(hfrc,'(i10)') frnew+1000000000
ndate = ndate(1:scend)//'.'//hfrc(31-newlen:10)
else if (newlen.eq.scend) then
write(ndate(1:scend),19) yrnew, monew, dynew, hrnew, minew, scnew
19 format(i4,'-',i2.2,'-',i2.2,'_',i2.2,':',i2.2,':',i2.2)
else if (newlen.eq.miend) then
write(ndate,16) yrnew, monew, dynew, hrnew, minew
16 format(i4,'-',i2.2,'-',i2.2,'_',i2.2,':',i2.2)
else if (newlen.eq.hrend) then
write(ndate,13) yrnew, monew, dynew, hrnew
13 format(i4,'-',i2.2,'-',i2.2,'_',i2.2)
else if (newlen.eq.dyend) then
write(ndate,10) yrnew, monew, dynew
10 format(i4,'-',i2.2,'-',i2.2)
end if
else
if (newlen.gt.frstart) then
write(ndate(1:scend),119) yrnew, monew, dynew, hrnew, minew, scnew
write(hfrc,'(i10)') frnew+1000000000
ndate = ndate(1:scend)//'.'//hfrc(31-newlen:10)
else if (newlen.eq.scend) then
write(ndate(1:scend),119) yrnew, monew, dynew, hrnew, minew, scnew
119 format(i4,i2.2,i2.2,i2.2,i2.2,i2.2)
else if (newlen.eq.miend) then
write(ndate,116) yrnew, monew, dynew, hrnew, minew
116 format(i4,i2.2,i2.2,i2.2,i2.2)
else if (newlen.eq.hrend) then
write(ndate,113) yrnew, monew, dynew, hrnew
113 format(i4,i2.2,i2.2,i2.2)
else if (newlen.eq.dyend) then
write(ndate,110) yrnew, monew, dynew
110 format(i4,i2.2,i2.2)
end if
endif
!------------------------------------------------------------------------------------------
!------------------------------------------------------------------------------------------
if (punct .and. (oldlen.ge.11) .and. (newlen.ge.11)) ndate(11:11) = sp
!------------------------------------------------------------------------------------------
end subroutine S3M_Tools_Time_GetNewDate
!------------------------------------------------------------------------------------------
end module S3M_Module_Tools_Time
!------------------------------------------------------------------------------------------