*=======================================================================
*
*   WCSLIB 4.3 - an implementation of the FITS WCS standard.
*   Copyright (C) 1995-2007, Mark Calabretta
*
*   This file is part of WCSLIB.
*
*   WCSLIB 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.
*
*   WCSLIB 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 Public
*   License along with WCSLIB.  If not, see http://www.gnu.org/licenses.
*
*   Correspondence concerning WCSLIB may be directed to:
*      Internet email: mcalabre@atnf.csiro.au
*      Postal address: Dr. Mark Calabretta
*                      Australia Telescope National Facility, CSIRO
*                      PO Box 76
*                      Epping NSW 1710
*                      AUSTRALIA
*
*   Author: Mark Calabretta, Australia Telescope National Facility
*   http://www.atnf.csiro.au/~mcalabre/index.html
*   $Id: cel.inc,v 4.3 2007/12/27 05:48:07 cal103 Exp $
*=======================================================================

*     Functions.
      INTEGER   CELINI, CELPUT, CELGET, CELPRT, CELSET, CELX2S, CELS2X

*     Length of the CELPRM data structure (INTEGER array).
      INTEGER   CELLEN
      PARAMETER (CELLEN = 140)

*     Codes for CEL data structure elements used by CELPUT and CELGET.
      INTEGER   CEL_FLAG, CEL_OFFSET, CEL_PHI0, CEL_PRJ, CEL_REF,
     :          CEL_THETA0

      PARAMETER (CEL_FLAG   = 100)
      PARAMETER (CEL_OFFSET = 101)
      PARAMETER (CEL_PHI0   = 102)
      PARAMETER (CEL_THETA0 = 103)
      PARAMETER (CEL_REF    = 104)
      PARAMETER (CEL_PRJ    = 105)

*     Codes for CEL data structure elements used by CELGET (only).
      INTEGER   CEL_EULER, CEL_ISOLAT

      PARAMETER (CEL_EULER  = 200)
      PARAMETER (CEL_ISOLAT = 201)

      CHARACTER CEL_ERRMSG(0:6)*80
      DATA CEL_ERRMSG /
     :   'Success',
     :   'Null celprm pointer passed',
     :   'Invalid projection parameters',
     :   'Invalid coordinate transformation parameters',
     :   'Ill-conditioned coordinate transformation parameters',
     :   'One or more of the (x,y) coordinates were invalid',
     :   'One or more of the (lng,lat) coordinates were invalid'/