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C $Header: /u/gcmpack/MITgcm/pkg/cal/cal_isleap.F,v 1.2 2003/10/09 04:19:19 edhill Exp $ |
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edhill |
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C $Name: $ |
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heimbach |
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edhill |
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#include "CAL_OPTIONS.h" |
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heimbach |
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jmc |
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INTEGER FUNCTION CAL_ISLEAP( |
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heimbach |
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I year, |
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jmc |
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I myThid ) |
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heimbach |
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jmc |
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C ================================================================== |
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C FUNCTION cal_IsLeap |
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C ================================================================== |
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C |
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C o In case the Gregorian calendar is used determine whether the |
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C given year is a leap year or not. |
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C |
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C started: Christian Eckert eckert@mit.edu 30-Jun-1999 |
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C changed: Christian Eckert eckert@mit.edu 29-Dec-1999 |
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C - restructured the original version in order to have a |
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C better interface to the MITgcmUV. |
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C Christian Eckert eckert@mit.edu 03-Feb-2000 |
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C - Introduced new routine and function names, cal_<NAME>, |
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C for verion 0.1.3. |
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C |
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C ================================================================== |
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C FUNCTION cal_IsLeap |
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C ================================================================== |
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heimbach |
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jmc |
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IMPLICIT NONE |
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heimbach |
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jmc |
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C == global variables == |
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#include "EEPARAMS.h" |
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heimbach |
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#include "cal.h" |
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C == routine arguments == |
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INTEGER year |
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INTEGER myThid |
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C == local variables == |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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C == end of interface == |
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IF ( cal_setStatus .LT. 1 ) THEN |
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WRITE( msgBuf,'(A,2(A,I9))') 'CAL_ISLEAP: ', |
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& 'year=', year |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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WRITE( msgBuf,'(2A,I2,A)') 'CAL_ISLEAP: ', |
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& 'called too early (cal_setStatus=',cal_setStatus,' )' |
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CALL PRINT_ERROR( msgBuf, myThid ) |
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STOP 'ABNORMAL END: FUNCTION CAL_ISLEAP' |
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ENDIF |
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heimbach |
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if ( usingGregorianCalendar ) then |
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if ( mod(year,4) .ne. 0 ) then |
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cal_IsLeap = 1 |
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else |
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cal_IsLeap = 2 |
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if ( (mod(year,100) .eq. 0) .and. |
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& (mod(year,400) .ne. 0) ) then |
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cal_IsLeap = 1 |
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endif |
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endif |
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else if ( usingJulianCalendar ) then |
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if ( mod(year,4) .ne. 0 ) then |
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cal_IsLeap = 1 |
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else |
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cal_IsLeap = 2 |
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endif |
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else |
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cal_IsLeap = 1 |
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endif |
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jmc |
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RETURN |
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END |
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