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/*
*+
* Name:
* palCaldj
* Purpose:
* Gregorian Calendar to Modified Julian Date
* Language:
* Starlink ANSI C
* Type of Module:
* Library routine
* Invocation:
* void palCaldj ( int iy, int im, int id, double *djm, int *j );
* Arguments:
* iy = int (Given)
* Year in the Gregorian calendar
* im = int (Given)
* Month in the Gergorian calendar
* id = int (Given)
* Day in the Gregorian calendar
* djm = double * (Returned)
* Modified Julian Date (JD-2400000.5) for 0 hrs
* j = status (Returned)
* 0 = OK. See eraCal2jd for other values.
* Description:
* Modified Julian Date to Gregorian Calendar with special
* behaviour for 2-digit years relating to 1950 to 2049.
* Authors:
* PTW: Pat Wallace (STFC)
* TIMJ: Tim Jenness (JAC, Hawaii)
* {enter_new_authors_here}
* History:
* 2012-02-11 (TIMJ):
* Initial version with documentation taken from Fortran SLA
* Adapted with permission from the Fortran SLALIB library.
* {enter_further_changes_here}
* Notes:
* - Uses eraCal2jd
* - Unlike eraCal2jd this routine treats the years 0-100 as
* referring to the end of the 20th Century and beginning of
* the 21st Century. If this behaviour is not acceptable
* use the SOFA/ERFA routine directly or palCldj.
* Acceptable years are 00-49, interpreted as 2000-2049,
* 50-99, " " 1950-1999,
* all others, interpreted literally.
* - Unlike SLA this routine will work with negative years.
* Copyright:
* Copyright (C) 1995 Rutherford Appleton Laboratory
* Copyright (C) 2012 Science and Technology Facilities Council.
* All Rights Reserved.
* Licence:
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
* Bugs:
* {note_any_bugs_here}
*-
*/
#include "pal.h"
#include "palmac.h"
#include "pal1sofa.h"
void palCaldj ( int iy, int im, int id, double *djm, int *j ) {
int adj = 0; /* Year adjustment */
double djm0;
if (iy >= 0 && iy <= 49) {
adj = 2000;
} else if (iy >= 50 && iy <= 99) {
adj = 1900;
}
iy += adj;
*j = eraCal2jd( iy, im, id, &djm0, djm );
}
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