/*

-Procedure wnunid_c ( Union two DP windows )

-Abstract
 
   Place the union of two double precision windows into a third 
   window. 
 
-Disclaimer

   THIS SOFTWARE AND ANY RELATED MATERIALS WERE CREATED BY THE
   CALIFORNIA INSTITUTE OF TECHNOLOGY (CALTECH) UNDER A U.S.
   GOVERNMENT CONTRACT WITH THE NATIONAL AERONAUTICS AND SPACE
   ADMINISTRATION (NASA). THE SOFTWARE IS TECHNOLOGY AND SOFTWARE
   PUBLICLY AVAILABLE UNDER U.S. EXPORT LAWS AND IS PROVIDED "AS-IS"
   TO THE RECIPIENT WITHOUT WARRANTY OF ANY KIND, INCLUDING ANY
   WARRANTIES OF PERFORMANCE OR MERCHANTABILITY OR FITNESS FOR A
   PARTICULAR USE OR PURPOSE (AS SET FORTH IN UNITED STATES UCC
   SECTIONS 2312-2313) OR FOR ANY PURPOSE WHATSOEVER, FOR THE
   SOFTWARE AND RELATED MATERIALS, HOWEVER USED.

   IN NO EVENT SHALL CALTECH, ITS JET PROPULSION LABORATORY, OR NASA
   BE LIABLE FOR ANY DAMAGES AND/OR COSTS, INCLUDING, BUT NOT
   LIMITED TO, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND,
   INCLUDING ECONOMIC DAMAGE OR INJURY TO PROPERTY AND LOST PROFITS,
   REGARDLESS OF WHETHER CALTECH, JPL, OR NASA BE ADVISED, HAVE
   REASON TO KNOW, OR, IN FACT, SHALL KNOW OF THE POSSIBILITY.

   RECIPIENT BEARS ALL RISK RELATING TO QUALITY AND PERFORMANCE OF
   THE SOFTWARE AND ANY RELATED MATERIALS, AND AGREES TO INDEMNIFY
   CALTECH AND NASA FOR ALL THIRD-PARTY CLAIMS RESULTING FROM THE
   ACTIONS OF RECIPIENT IN THE USE OF THE SOFTWARE.

-Required_Reading
 
   WINDOWS 
 
-Keywords
 
   WINDOWS 
 
*/

   #include "SpiceUsr.h"
   #include "SpiceZfc.h"
   #include "SpiceZmc.h"

   void wnunid_c ( SpiceCell   * a,
                   SpiceCell   * b,
                   SpiceCell   * c ) 

/*

-Brief_I/O

   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   a, 
   b          I   Input windows. 
   c          I   Union of a and b. 
 
-Detailed_Input
 
   a, 
   b           are CSPICE windows, each of which contains zero or more 
               intervals. 

               a and b must be declared as double precision 
               SpiceCells.
 
-Detailed_Output
 
   c           is the output CSPICE  window, containing the union of 
               a and b---every point contained in a, or in b, 
               or in both. 
 
               c must be declared as a double precision SpiceCell.

               c must be distinct from both a and b. 
 
-Parameters
 
   None. 
 
-Exceptions
 
   1) If any of the function arguments are SpiceCells of type
      other than double precision, the error SPICE(TYPEMISMATCH)
      is signaled.

   2) If the union of the two windows results in an excess of 
      elements, the error SPICE(WINDOWEXCESS) is signaled. 
 
-Files
 
   None. 
 
-Particulars
 
   The union of two windows contains every point contained in the 
   first window, or the second window, or both. 
 
-Examples
 
   Let a contain the intervals 

         [ 1, 3 ]  [ 7, 11 ]  [ 23, 27 ] 

   and b contain the intervals 

         [ 2, 6 ]  [ 8, 10 ]  [ 16, 18 ] 

   Then the union of a and b contains the intervals 

         [ 1, 6 ]  [ 7, 11 ]  [ 16, 18 ]  [ 23, 27 ] 
 
-Restrictions
 
   None. 
 
-Literature_References
 
   None. 
 
-Author_and_Institution

   N.J. Bachman    (JPL)
   H.A. Neilan     (JPL) 
   W.L. Taber      (JPL) 
   I.M. Underwood  (JPL) 
 
-Version
 
   -CSPICE Version 1.0.0, 29-JUL-2002 (NJB) (HAN) (WLT) (IMU)

-Index_Entries
 
   union two d.p. windows 
 
-&
*/

{ /* Begin wnunid_c */

 

   /*
   Participate in error tracing.
   */
   if ( return_c() )
   {
      return;
   }
   chkin_c ( "wnunid_c" );


   /*
   Make sure cell data types are d.p. 
   */
   CELLTYPECHK3 ( CHK_STANDARD, "wnunid_c", SPICE_DP, a, b, c );


   /*
   Initialize the cells if necessary. 
   */
   CELLINIT3 ( a, b, c );
   

   /*
   Let the f2c'd routine do the work. 
   */
   wnunid_ ( (doublereal *) (a->base),
             (doublereal *) (b->base), 
             (doublereal *) (c->base)  );

   /*
   Sync the output cell. 
   */
   if ( !failed_c() )
   {
      zzsynccl_c ( F2C, c );
   }


   chkout_c ( "wnunid_c" );

} /* End wnunid_c */
