MODULE date_pack
! This module is able to perform three date and time functions:
! 1. geth_idts (ndate, odate, idts)
! Get the time period between two dates.
! 2. geth_newdate ( ndate, odate, idts)
! Get the new date based on the old date and a time difference.
! 3. split_date_char ( date , century_year , month , day , hour , minute , second )
! Given the date, return the integer components.
use module_debug
CONTAINS
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE geth_idts (ndate, odate, idts)
IMPLICIT NONE
! From 2 input mdates ('YYYY-MM-DD HH:MM:SS.ffff'),
! compute the time difference.
! on entry - ndate - the new hdate.
! odate - the old hdate.
! on exit - idts - the change in time in seconds.
CHARACTER (LEN=*) , INTENT(INOUT) :: ndate, odate
INTEGER , INTENT(OUT) :: idts
! Local Variables
! yrnew - indicates the year associated with "ndate"
! yrold - indicates the year associated with "odate"
! monew - indicates the month associated with "ndate"
! moold - indicates the month associated with "odate"
! dynew - indicates the day associated with "ndate"
! dyold - indicates the day associated with "odate"
! hrnew - indicates the hour associated with "ndate"
! hrold - indicates the hour associated with "odate"
! minew - indicates the minute associated with "ndate"
! miold - indicates the minute associated with "odate"
! scnew - indicates the second associated with "ndate"
! scold - indicates the second associated with "odate"
! i - loop counter
! mday - a list assigning the number of days in each month
CHARACTER (LEN=24) :: tdate
INTEGER :: olen, nlen
INTEGER :: yrnew, monew, dynew, hrnew, minew, scnew
INTEGER :: yrold, moold, dyold, hrold, miold, scold
INTEGER :: mday(12), i, newdys, olddys
LOGICAL :: npass, opass
INTEGER :: isign
IF (odate.GT.ndate) THEN
isign = -1
tdate=ndate
ndate=odate
odate=tdate
ELSE
isign = 1
END IF
! Assign the number of days in a months
mday( 1) = 31
mday( 2) = 28
mday( 3) = 31
mday( 4) = 30
mday( 5) = 31
mday( 6) = 30
mday( 7) = 31
mday( 8) = 31
mday( 9) = 30
mday(10) = 31
mday(11) = 30
mday(12) = 31
! Break down old hdate into parts
hrold = 0
miold = 0
scold = 0
olen = LEN(odate)
READ(odate(1:4), '(I4)') yrold
READ(odate(6:7), '(I2)') moold
READ(odate(9:10), '(I2)') dyold
IF (olen.GE.13) THEN
READ(odate(12:13),'(I2)') hrold
IF (olen.GE.16) THEN
READ(odate(15:16),'(I2)') miold
IF (olen.GE.19) THEN
READ(odate(18:19),'(I2)') scold
END IF
END IF
END IF
! Break down new hdate into parts
hrnew = 0
minew = 0
scnew = 0
nlen = LEN(ndate)
READ(ndate(1:4), '(I4)') yrnew
READ(ndate(6:7), '(I2)') monew
READ(ndate(9:10), '(I2)') dynew
IF (nlen.GE.13) THEN
READ(ndate(12:13),'(I2)') hrnew
IF (nlen.GE.16) THEN
READ(ndate(15:16),'(I2)') minew
IF (nlen.GE.19) THEN
READ(ndate(18:19),'(I2)') scnew
END IF
END IF
END IF
! Check that the dates make sense.
npass = .true.
opass = .true.
! Check that the month of NDATE makes sense.
IF ((monew.GT.12).or.(monew.LT.1)) THEN
PRINT*, 'GETH_IDTS: Month of NDATE = ', monew
npass = .false.
END IF
! Check that the month of ODATE makes sense.
IF ((moold.GT.12).or.(moold.LT.1)) THEN
PRINT*, 'GETH_IDTS: Month of ODATE = ', moold
opass = .false.
END IF
! Check that the day of NDATE makes sense.
IF (monew.ne.2) THEN
! ...... For all months but February
IF ((dynew.GT.mday(monew)).or.(dynew.LT.1)) THEN
PRINT*, 'GETH_IDTS: Day of NDATE = ', dynew
npass = .false.
END IF
ELSE IF (monew.eq.2) THEN
! ...... For February
IF ((dynew.GT.nfeb(yrnew)).OR.(dynew.LT.1)) THEN
PRINT*, 'GETH_IDTS: Day of NDATE = ', dynew
npass = .false.
END IF
END IF
! Check that the day of ODATE makes sense.
IF (moold.ne.2) THEN
! ...... For all months but February
IF ((dyold.GT.mday(moold)).or.(dyold.LT.1)) THEN
PRINT*, 'GETH_IDTS: Day of ODATE = ', dyold
opass = .false.
END IF
ELSE IF (moold.eq.2) THEN
! ....... For February
IF ((dyold.GT.nfeb(yrold)).or.(dyold.LT.1)) THEN
PRINT*, 'GETH_IDTS: Day of ODATE = ', dyold
opass = .false.
END IF
END IF
! Check that the hour of NDATE makes sense.
IF ((hrnew.GT.23).or.(hrnew.LT.0)) THEN
PRINT*, 'GETH_IDTS: Hour of NDATE = ', hrnew
npass = .false.
END IF
! Check that the hour of ODATE makes sense.
IF ((hrold.GT.23).or.(hrold.LT.0)) THEN
PRINT*, 'GETH_IDTS: Hour of ODATE = ', hrold
opass = .false.
END IF
! Check that the minute of NDATE makes sense.
IF ((minew.GT.59).or.(minew.LT.0)) THEN
PRINT*, 'GETH_IDTS: Minute of NDATE = ', minew
npass = .false.
END IF
! Check that the minute of ODATE makes sense.
IF ((miold.GT.59).or.(miold.LT.0)) THEN
PRINT*, 'GETH_IDTS: Minute of ODATE = ', miold
opass = .false.
END IF
! Check that the second of NDATE makes sense.
IF ((scnew.GT.59).or.(scnew.LT.0)) THEN
PRINT*, 'GETH_IDTS: SECOND of NDATE = ', scnew
npass = .false.
END IF
! Check that the second of ODATE makes sense.
IF ((scold.GT.59).or.(scold.LT.0)) THEN
PRINT*, 'GETH_IDTS: Second of ODATE = ', scold
opass = .false.
END IF
IF (.not. npass) THEN
call mprintf(.true.,ERROR,'Screwy NDATE: %s',s1=ndate(1:nlen))
END IF
IF (.not. opass) THEN
call mprintf(.true.,ERROR,'Screwy ODATE: %s',s1=odate(1:olen))
END IF
! Date Checks are completed. Continue.
! Compute number of days from 1 January ODATE, 00:00:00 until ndate
! Compute number of hours from 1 January ODATE, 00:00:00 until ndate
! Compute number of minutes from 1 January ODATE, 00:00:00 until ndate
newdys = 0
DO i = yrold, yrnew - 1
newdys = newdys + (365 + (nfeb(i)-28))
END DO
IF (monew .GT. 1) THEN
mday(2) = nfeb(yrnew)
DO i = 1, monew - 1
newdys = newdys + mday(i)
END DO
mday(2) = 28
END IF
newdys = newdys + dynew-1
! Compute number of hours from 1 January ODATE, 00:00:00 until odate
! Compute number of minutes from 1 January ODATE, 00:00:00 until odate
olddys = 0
IF (moold .GT. 1) THEN
mday(2) = nfeb(yrold)
DO i = 1, moold - 1
olddys = olddys + mday(i)
END DO
mday(2) = 28
END IF
olddys = olddys + dyold-1
! Determine the time difference in seconds
idts = (newdys - olddys) * 86400
idts = idts + (hrnew - hrold) * 3600
idts = idts + (minew - miold) * 60
idts = idts + (scnew - scold)
IF (isign .eq. -1) THEN
tdate=ndate
ndate=odate
odate=tdate
idts = idts * isign
END IF
END SUBROUTINE geth_idts
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE geth_newdate (ndate, odate, idt)
IMPLICIT NONE
! From old date ('YYYY-MM-DD HH:MM:SS.ffff') 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=*) , INTENT(OUT) :: ndate
CHARACTER (LEN=*) , INTENT(IN) :: odate
! 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 :: nlen, olen
INTEGER :: yrnew, monew, dynew, hrnew, minew, scnew, frnew
INTEGER :: yrold, moold, dyold, hrold, miold, scold, frold
INTEGER :: mday(12), nday, nhour, nmin, nsec, nfrac, i, ifrc
LOGICAL :: opass
CHARACTER (LEN=10) :: hfrc
CHARACTER (LEN=1) :: sp
! INTEGER, EXTERNAL :: nfeb ! in the same module now
! Assign the number of days in a months
mday( 1) = 31
mday( 2) = 28
mday( 3) = 31
mday( 4) = 30
mday( 5) = 31
mday( 6) = 30
mday( 7) = 31
mday( 8) = 31
mday( 9) = 30
mday(10) = 31
mday(11) = 30
mday(12) = 31
! Break down old hdate into parts
hrold = 0
miold = 0
scold = 0
frold = 0
olen = LEN(odate)
IF (olen.GE.11) THEN
sp = odate(11:11)
else
sp = ' '
END IF
! Use internal READ statements to convert the CHARACTER string
! date into INTEGER components.
READ(odate(1:4), '(I4)') yrold
READ(odate(6:7), '(I2)') moold
READ(odate(9:10), '(I2)') dyold
IF (olen.GE.13) THEN
READ(odate(12:13),'(I2)') hrold
IF (olen.GE.16) THEN
READ(odate(15:16),'(I2)') miold
IF (olen.GE.19) THEN
READ(odate(18:19),'(I2)') scold
IF (olen.GT.20) THEN
READ(odate(21:olen),'(I2)') frold
END IF
END IF
END IF
END IF
! Set the number of days in February for that year.
mday(2) = nfeb(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
call mprintf(.true.,ERROR,'GETH_NEWDATE: Crazy ODATE: %s %i',s1=odate(1:olen),i1=olen)
END IF
! Date Checks are completed. Continue.
! Compute the number of days, hours, minutes, and seconds in idt
IF (olen.GT.20) THEN !idt should be in fractions of seconds
ifrc = olen-20
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 (olen.eq.19) 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 (olen.eq.16) 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 (olen.eq.13) 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 (olen.eq.10) THEN !idt should be in days
ifrc = 1
nday = ABS(idt)/24 ! Integer number of days in delta-time
nhour = 0
nmin = 0
nsec = 0
nfrac = 0
ELSE
call mprintf(.true.,ERROR,'GETH_NEWDATE: Strange length for ODATE: %i',i1=olen)
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(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(yrnew)
END IF
dynew = mday(monew)
END IF
END DO
END IF
! Now construct the new mdate
nlen = LEN(ndate)
IF (nlen.GT.20) THEN
WRITE(ndate(1:19),19) yrnew, monew, dynew, hrnew, minew, scnew
WRITE(hfrc,'(I10)') frnew+1000000000
ndate = ndate(1:19)//'.'//hfrc(31-nlen:10)
ELSE IF (nlen.eq.19.or.nlen.eq.20) THEN
WRITE(ndate(1:19),19) yrnew, monew, dynew, hrnew, minew, scnew
19 format(I4,'-',I2.2,'-',I2.2,'_',I2.2,':',I2.2,':',I2.2)
IF (nlen.eq.20) ndate = ndate(1:19)//'.'
ELSE IF (nlen.eq.16) THEN
WRITE(ndate,16) yrnew, monew, dynew, hrnew, minew
16 format(I4,'-',I2.2,'-',I2.2,'_',I2.2,':',I2.2)
ELSE IF (nlen.eq.13) THEN
WRITE(ndate,13) yrnew, monew, dynew, hrnew
13 format(I4,'-',I2.2,'-',I2.2,'_',I2.2)
ELSE IF (nlen.eq.10) THEN
WRITE(ndate,10) yrnew, monew, dynew
10 format(I4,'-',I2.2,'-',I2.2)
END IF
IF (olen.GE.11) ndate(11:11) = sp
END SUBROUTINE geth_newdate
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
FUNCTION nfeb ( year ) RESULT (num_days)
! Compute the number of days in February for the given year
IMPLICIT NONE
INTEGER :: year
INTEGER :: num_days
num_days = 28 ! By default, February has 28 days ...
IF (MOD(year,4).eq.0) THEN
num_days = 29 ! But every four years, it has 29 days ...
IF (MOD(year,100).eq.0) THEN
num_days = 28 ! Except every 100 years, when it has 28 days ...
IF (MOD(year,400).eq.0) THEN
num_days = 29 ! Except every 400 years, when it has 29 days.
END IF
END IF
END IF
END FUNCTION nfeb
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE split_date_char ( date , century_year , month , day , hour , minute , second )
IMPLICIT NONE
! Input data.
CHARACTER(LEN=19) , INTENT(IN) :: date
! Output data.
INTEGER , INTENT(OUT) :: century_year , month , day , hour , minute , second
READ(date,FMT='( I4.4)') century_year
READ(date,FMT='( 5X,I2.2)') month
READ(date,FMT='( 8X,I2.2)') day
READ(date,FMT='(11X,I2.2)') hour
READ(date,FMT='(14X,I2.2)') minute
READ(date,FMT='(17X,I2.2)') second
END SUBROUTINE split_date_char
END MODULE date_pack