upgrade AST

1 files changed, 155 insertions, 0 deletions

diff --git a/ast/erfa/eform.c b/ast/erfa/eform.c
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+#include "erfa.h"
+
+int eraEform ( int n, double *a, double *f )
+/*
+**  - - - - - - - - -
+**   e r a E f o r m
+**  - - - - - - - - -
+**
+**  Earth reference ellipsoids.
+**
+**  Given:
+**     n    int         ellipsoid identifier (Note 1)
+**
+**  Returned:
+**     a    double      equatorial radius (meters, Note 2)
+**     f    double      flattening (Note 2)
+**
+**  Returned (function value):
+**          int         status:  0 = OK
+**                              -1 = illegal identifier (Note 3)
+**
+**  Notes:
+**
+**  1) The identifier n is a number that specifies the choice of
+**     reference ellipsoid.  The following are supported:
+**
+**        n    ellipsoid
+**
+**        1     ERFA_WGS84
+**        2     ERFA_GRS80
+**        3     ERFA_WGS72
+**
+**     The n value has no significance outside the ERFA software.  For
+**     convenience, symbols ERFA_WGS84 etc. are defined in erfam.h.
+**
+**  2) The ellipsoid parameters are returned in the form of equatorial
+**     radius in meters (a) and flattening (f).  The latter is a number
+**     around 0.00335, i.e. around 1/298.
+**
+**  3) For the case where an unsupported n value is supplied, zero a and
+**     f are returned, as well as error status.
+**
+**  References:
+**
+**     Department of Defense World Geodetic System 1984, National
+**     Imagery and Mapping Agency Technical Report 8350.2, Third
+**     Edition, p3-2.
+**
+**     Moritz, H., Bull. Geodesique 66-2, 187 (1992).
+**
+**     The Department of Defense World Geodetic System 1972, World
+**     Geodetic System Committee, May 1974.
+**
+**     Explanatory Supplement to the Astronomical Almanac,
+**     P. Kenneth Seidelmann (ed), University Science Books (1992),
+**     p220.
+**
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  Derived, with permission, from the SOFA library.  See notes at end of file.
+*/
+{
+
+/* Look up a and f for the specified reference ellipsoid. */
+   switch ( n ) {
+
+   case ERFA_WGS84:
+      *a = 6378137.0;
+      *f = 1.0 / 298.257223563;
+      break;
+
+   case ERFA_GRS80:
+      *a = 6378137.0;
+      *f = 1.0 / 298.257222101;
+      break;
+
+   case ERFA_WGS72:
+      *a = 6378135.0;
+      *f = 1.0 / 298.26;
+      break;
+
+   default:
+
+   /* Invalid identifier. */
+      *a = 0.0;
+      *f = 0.0;
+      return -1;
+
+   }
+
+/* OK status. */
+   return 0;
+
+}
+/*----------------------------------------------------------------------
+**  
+**  
+**  Copyright (C) 2013-2016, NumFOCUS Foundation.
+**  All rights reserved.
+**  
+**  This library is derived, with permission, from the International
+**  Astronomical Union's "Standards of Fundamental Astronomy" library,
+**  available from http://www.iausofa.org.
+**  
+**  The ERFA version is intended to retain identical functionality to
+**  the SOFA library, but made distinct through different function and
+**  file names, as set out in the SOFA license conditions.  The SOFA
+**  original has a role as a reference standard for the IAU and IERS,
+**  and consequently redistribution is permitted only in its unaltered
+**  state.  The ERFA version is not subject to this restriction and
+**  therefore can be included in distributions which do not support the
+**  concept of "read only" software.
+**  
+**  Although the intent is to replicate the SOFA API (other than
+**  replacement of prefix names) and results (with the exception of
+**  bugs;  any that are discovered will be fixed), SOFA is not
+**  responsible for any errors found in this version of the library.
+**  
+**  If you wish to acknowledge the SOFA heritage, please acknowledge
+**  that you are using a library derived from SOFA, rather than SOFA
+**  itself.
+**  
+**  
+**  TERMS AND CONDITIONS
+**  
+**  Redistribution and use in source and binary forms, with or without
+**  modification, are permitted provided that the following conditions
+**  are met:
+**  
+**  1 Redistributions of source code must retain the above copyright
+**    notice, this list of conditions and the following disclaimer.
+**  
+**  2 Redistributions in binary form must reproduce the above copyright
+**    notice, this list of conditions and the following disclaimer in
+**    the documentation and/or other materials provided with the
+**    distribution.
+**  
+**  3 Neither the name of the Standards Of Fundamental Astronomy Board,
+**    the International Astronomical Union nor the names of its
+**    contributors may be used to endorse or promote products derived
+**    from this software without specific prior written permission.
+**  
+**  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+**  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+**  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+**  FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+**  COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+**  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+**  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+**  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+**  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+**  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+**  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+**  POSSIBILITY OF SUCH DAMAGE.
+**  
+*/