mirror of
https://github.com/eddyem/BTA_lib.git
synced 2025-12-06 10:45:11 +03:00
73 lines
2.3 KiB
Fortran
73 lines
2.3 KiB
Fortran
SUBROUTINE sla_CD2TF (NDP, DAYS, SIGN, IHMSF)
|
|
*+
|
|
* - - - - - -
|
|
* C D 2 T F
|
|
* - - - - - -
|
|
*
|
|
* Convert an interval in days into hours, minutes, seconds
|
|
*
|
|
* (single precision)
|
|
*
|
|
* Given:
|
|
* NDP int number of decimal places of seconds
|
|
* DAYS real interval in days
|
|
*
|
|
* Returned:
|
|
* SIGN char '+' or '-'
|
|
* IHMSF int(4) hours, minutes, seconds, fraction
|
|
*
|
|
* Notes:
|
|
*
|
|
* 1) NDP less than zero is interpreted as zero.
|
|
*
|
|
* 2) The largest useful value for NDP is determined by the size of
|
|
* DAYS, the format of REAL floating-point numbers on the target
|
|
* machine, and the risk of overflowing IHMSF(4). On some
|
|
* architectures, for DAYS up to 1.0, the available floating-
|
|
* point precision corresponds roughly to NDP=3. This is well
|
|
* below the ultimate limit of NDP=9 set by the capacity of a
|
|
* typical 32-bit IHMSF(4).
|
|
*
|
|
* 3) The absolute value of DAYS may exceed 1.0. In cases where it
|
|
* does not, it is up to the caller to test for and handle the
|
|
* case where DAYS is very nearly 1.0 and rounds up to 24 hours,
|
|
* by testing for IHMSF(1)=24 and setting IHMSF(1-4) to zero.
|
|
*
|
|
* Called: sla_DD2TF
|
|
*
|
|
* Last revision: 26 December 2004
|
|
*
|
|
* Copyright P.T.Wallace. All rights reserved.
|
|
*
|
|
* License:
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program (see SLA_CONDITIONS); if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
|
* Boston, MA 02111-1307 USA
|
|
*
|
|
*-
|
|
|
|
IMPLICIT NONE
|
|
|
|
INTEGER NDP
|
|
REAL DAYS
|
|
CHARACTER SIGN*(*)
|
|
INTEGER IHMSF(4)
|
|
|
|
|
|
|
|
* Call double precision version
|
|
CALL sla_DD2TF(NDP,DBLE(DAYS),SIGN,IHMSF)
|
|
|
|
END
|