cr2tf.f

      SUBROUTINE sla_CR2TF (NDP, ANGLE, SIGN, IHMSF)
*+
*     - - - - - -
*      C R 2 T F
*     - - - - - -
*
*  Convert an angle in radians into hours, minutes, seconds
*  (single precision)
*
*  Given:
*     NDP       int      number of decimal places of seconds
*     ANGLE     real     angle in radians
*
*  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
*      ANGLE, the format of REAL floating-point numbers on the target
*      machine, and the risk of overflowing IHMSF(4).  On some
*      architectures, for ANGLE up to 2pi, 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 ANGLE may exceed 2pi.  In cases where it
*      does not, it is up to the caller to test for and handle the
*      case where ANGLE is very nearly 2pi and rounds up to 24 hours,
*      by testing for IHMSF(1)=24 and setting IHMSF(1-4) to zero.
*
*  Called:  sla_CD2TF
*
*  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 ANGLE
      CHARACTER SIGN*(*)
      INTEGER IHMSF(4)

*  Turns to radians
      REAL T2R
      PARAMETER (T2R=6.283185307179586476925287)



*  Scale then use days to h,m,s routine
      CALL sla_CD2TF(NDP,ANGLE/T2R,SIGN,IHMSF)

      END