1 files changed, 56 insertions, 0 deletions
diff --git a/src/slalib/ctf2d.f b/src/slalib/ctf2d.f
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+      SUBROUTINE sla_CTF2D (IHOUR, IMIN, SEC, DAYS, J)
+*+
+*     - - - - - -
+*      C T F 2 D
+*     - - - - - -
+*
+*  Convert hours, minutes, seconds to days (single precision)
+*
+*  Given:
+*     IHOUR       int       hours
+*     IMIN        int       minutes
+*     SEC         real      seconds
+*
+*  Returned:
+*     DAYS        real      interval in days
+*     J           int       status:  0 = OK
+*                                    1 = IHOUR outside range 0-23
+*                                    2 = IMIN outside range 0-59
+*                                    3 = SEC outside range 0-59.999...
+*
+*  Notes:
+*
+*  1)  The result is computed even if any of the range checks
+*      fail.
+*
+*  2)  The sign must be dealt with outside this routine.
+*
+*  P.T.Wallace   Starlink   November 1984
+*
+*  Copyright (C) 1995 Rutherford Appleton Laboratory
+*-
+
+      IMPLICIT NONE
+
+      INTEGER IHOUR,IMIN
+      REAL SEC,DAYS
+      INTEGER J
+
+*  Seconds per day
+      REAL D2S
+      PARAMETER (D2S=86400.0)
+
+
+
+*  Preset status
+      J=0
+
+*  Validate sec, min, hour
+      IF (SEC.LT.0.0.OR.SEC.GE.60.0) J=3
+      IF (IMIN.LT.0.OR.IMIN.GT.59) J=2
+      IF (IHOUR.LT.0.OR.IHOUR.GT.23) J=1
+
+*  Compute interval
+      DAYS=(60.0*(60.0*REAL(IHOUR)+REAL(IMIN))+SEC)/D2S
+
+      END