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   pcpool_c ( Put character strings into the kernel pool ) 

   void pcpool_c ( ConstSpiceChar  * name,
                   SpiceInt          n,
                   SpiceInt          cvalen,
                   const void      * cvals    )


   Provide toolkit programmers a method for programmatically
   inserting character data into the kernel pool.






   --------  ---  --------------------------------------------------
   name       I   The kernel pool name to associate with cvals.
   n          I   The number of values to insert.
   cvalen     I   The lengths of the strings in the array cvals.
   cvals      I   An array of strings to insert into the kernel pool.


   name        is the name of the kernel pool variable to associate
               with the values supplied in the array cvals. 'name' is
               restricted to a length of 32 characters or less.

   n           is the number of values to insert into the kernel pool.

   cvalen      is the length of the strings in the array cvals,
               including the null terminators.

   cvals       is an array of strings to insert into the kernel
               pool. cvals should be declared as follows:

                  char  cvals[n][cvalen];






   1)  If `name' is already present in the kernel pool and there
       is sufficient room to hold all values supplied in `cvals',
       the old values associated with `name' will be overwritten.

   2)  If there is not sufficient room to insert a new variable into
       the kernel pool and `name' is not already present in the kernel
       pool, an error is signaled by a routine in the call tree of
       this routine.

   3)  If there is not sufficient room to insert the values
       associated with `name', the error SPICE(NOMOREROOM) is signaled
       by a routine in the call tree of this routine.

   4)  If the kernel pool variable name length exceeds its maximum
       allowed length (see Kernel Required Reading, kernel.req), the
       error SPICE(BADVARNAME) is signaled by a routine in the call
       tree of this routine.

   5)  If the `name' input string pointer is null, the error
       SPICE(NULLPOINTER) is signaled.

   6)  If the `name' input string has zero length, the error
       SPICE(EMPTYSTRING) is signaled.

   7)  If the `cvals' input array pointer is null, the error
       SPICE(NULLPOINTER) is signaled.

   8)  If the `cvals' input array strings have length less than two
       characters, the error SPICE(STRINGTOOSHORT) is signaled.




   This entry point provides a programmatic interface for inserting
   character data into the SPICE kernel pool without reading an
   external file.


   The numerical results shown for this example may differ across
   platforms. The results depend on the SPICE kernels used as input,
   the compiler and supporting libraries, and the machine specific
   arithmetic implementation.

   1) The following example code shows how a topocentric frame for a
      point on the surface of the earth may be defined at run time using
      pcpool_c, pdpool_c, and pipool_c. In this example, the surface
      point is associated with the body code 300000. To facilitate
      testing, the location of the surface point coincides with that of
      the DSN station DSS-12; the reference frame MYTOPO defined here
      coincides with the reference frame DSS-12_TOPO.

      Use the meta-kernel shown below to load the required SPICE


         File name:

         This meta-kernel is intended to support operation of SPICE
         example programs. The kernels shown here should not be
         assumed to contain adequate or correct versions of data
         required by SPICE-based user applications.

         In order for an application to use this meta-kernel, the
         kernels referenced here must be present in the user's
         current working directory.

         The names and contents of the kernels referenced
         by this meta-kernel are as follows:

            File name                        Contents
            ---------                        --------
            earth_720101_070426.bpc          Earth historical
                                             binary PCK
               DSN station FK


         KERNELS_TO_LOAD = ( 'earth_720101_070426.bpc',
                             ''    )


         End of meta-kernel.

      Example code begins here.

         Program pcpool_ex1
      #include <stdio.h>
      #include "SpiceUsr.h"

      int main()
         The first angle is the negative of the longitude of the
         surface point; the second angle is the negative of the
         point's colatitude.
         SpiceDouble             angles [3]      =  { -243.1945102442646,
                                                       180.0              };

         SpiceDouble             et              =    0.0;
         SpiceDouble             rmat   [3][3];

         SpiceInt                axes   [3]      =  { 3, 2, 3 };
         SpiceInt                center          =    300000;
         SpiceInt                frclass         =    4;
         SpiceInt                frclsid         =    1500000;
         SpiceInt                frcode          =    1500000;

         Define the MYTOPO reference frame.

         Note that the third argument in the pcpool_c calls is
         the length of the final string argument, including the
         terminating null character.
         pipool_c ( "FRAME_MYTOPO",            1,     &frcode   );
         pcpool_c ( "FRAME_1500000_NAME",      1, 7,  "MYTOPO"  );
         pipool_c ( "FRAME_1500000_CLASS",     1,     &frclass  );
         pipool_c ( "FRAME_1500000_CLASS_ID",  1,     &frclsid  );
         pipool_c ( "FRAME_1500000_CENTER",    1,     &center   );

         pcpool_c ( "OBJECT_300000_FRAME",     1, 7,  "MYTOPO"  );

         pcpool_c ( "TKFRAME_MYTOPO_RELATIVE", 1, 7,  "ITRF93"  );
         pcpool_c ( "TKFRAME_MYTOPO_SPEC",     1, 7,  "ANGLES"  );
         pcpool_c ( "TKFRAME_MYTOPO_UNITS",    1, 8,  "DEGREES" );
         pipool_c ( "TKFRAME_MYTOPO_AXES",     3,     axes      );
         pdpool_c ( "TKFRAME_MYTOPO_ANGLES",   3,     angles    );

         Load a high precision binary earth PCK. Also load a
         topocentric frame kernel for DSN stations. Use a meta-kernel
         for convenience.
         furnsh_c ( "" );

         Look up transformation from DSS-12_TOPO frame to MYTOPO frame.
         This transformation should differ by round-off error from
         the identity matrix.
         pxform_c ( "DSS-12_TOPO", "MYTOPO", et, rmat );

         printf   ( "\n"
                    "DSS-12_TOPO to MYTOPO transformation at "
                    "et %15.6f: \n"
                    "   %19.16f  %19.16f  %19.16f\n"
                    "   %19.16f  %19.16f  %19.16f\n"
                    "   %19.16f  %19.16f  %19.16f\n",
                    rmat[0][0],  rmat[0][1],  rmat[0][2],
                    rmat[1][0],  rmat[1][1],  rmat[1][2],
                    rmat[2][0],  rmat[2][1],  rmat[2][2]       );

         return ( 0 );

      When this program was executed on a Mac/Intel/cc/64-bit
      platform, the output was:

      DSS-12_TOPO to MYTOPO transformation at et        0.000000:

          1.0000000000000000   0.0000000000000000   0.0000000000000001
          0.0000000000000000   1.0000000000000000  -0.0000000000000000
          0.0000000000000001  -0.0000000000000000   1.0000000000000000






   N.J. Bachman        (JPL)
   J. Diaz del Rio     (ODC Space)
   W.L. Taber          (JPL)
   E.D. Wright         (JPL)


   -CSPICE Version 1.4.0, 27-AUG-2021 (JDR)

       Changed input argument name "lenvals" to "cvalen" for
       consistency with other routines.

       Edited the header to comply with NAIF standard. Added
       example's meta-kernel. Reformatted example's output.

       Added entry #7 to -Exceptions section.

   -CSPICE Version 1.3.3, 17-JAN-2014 (NJB)

       Updated -Index_Entries section.

   -CSPICE Version 1.3.2, 10-FEB-2010 (EDW)

       Added mention of the restriction on kernel pool variable
       names to 32 characters or less.

       Reordered header sections to conform to SPICE convention.

   -CSPICE Version 1.3.1, 17-NOV-2005 (NJB)

       Replaced code fragment in -Examples section of header with
       smaller, complete program.

   -CSPICE Version 1.3.0, 12-JUL-2002 (NJB)

       Call to C2F_CreateStrArr_Sig replaced with call to C2F_MapStrArr.

   -CSPICE Version 1.2.0, 28-AUG-2001 (NJB)

       Const-qualified input array cvals.

   -CSPICE Version 1.1.0, 14-FEB-2000 (NJB)

       Calls to C2F_CreateStrArr replaced with calls to error-signaling
       version of this routine:  C2F_CreateStrArr_Sig.

   -CSPICE Version 1.0.0, 18-JUN-1999 (NJB) (WLT)


   Set the value of a character_variable in the kernel_pool
Fri Dec 31 18:41:10 2021