Index Page pckfrm_c

A B C D E F G H I J K L M N O P Q R S T U V W X

Procedure Abstract Required_Reading Keywords Brief_I/O Detailed_Input | Detailed_Output Parameters Exceptions Files Particulars Examples | Restrictions Literature_References Author_and_Institution Version Index_Entries

#### Procedure

       void pckfrm_c ( ConstSpiceChar  * pck,
                       SpiceCell       * ids  )

#### Abstract

       Find the set of reference frame class ID codes of all frames
       in a specified binary PCK file.

#### Required_Reading

       CELLS
       DAF
       SETS
       PCK

#### Keywords

       ORIENTATION
       UTILITY

#### Brief_I/O

       Variable  I/O  Description
       --------  ---  --------------------------------------------------
       pck        I   Name of PCK file.
       ids       I/O  Set of frame class ID codes of frames in PCK file.

#### Detailed_Input

       pck            is the name of a binary PCK file.

       ids            is an initialized CSPICE set data structure. `ids'
                      optionally may contain a set of ID codes on input; on
                      output, the data already present in `ids' will be
                      combined with ID code set found for the file PCK.

                      If `ids' contains no data on input, its size and
                      cardinality still must be initialized.

#### Detailed_Output

       ids            is a CSPICE set data structure which contains the
                      union of its contents upon input with the set of
                      reference frame class ID codes of each frame for
                      which data are present in the indicated PCK file. The
                      elements of CSPICE sets are unique; hence each ID
                      code in `ids' appears only once, even if the PCK file
                      contains multiple segments for that ID code.

                      See the Examples section below for a complete example
                      program showing how to retrieve the ID codes from
                      `ids'.

#### Parameters

       None.

#### Exceptions

       1)  If the input file has transfer format, the error
           SPICE(INVALIDFORMAT) is signaled.

       2)  If the input file is not a transfer file but has architecture
           other than DAF, the error SPICE(BADARCHTYPE) is signaled.

       3)  If the input file is a binary DAF file of type other than
           PCK, the error SPICE(BADFILETYPE) is signaled.

       4)  If the PCK file cannot be opened or read, the error will
           be diagnosed by routines called by this routine.

       5)  If the size of the output set argument `ids' is insufficient to
           contain the actual number of ID codes of frames covered by
           the indicated PCK file, the error will be diagnosed by
           routines called by this routine.

       6)  The error SPICE(EMPTYSTRING) is signaled if the input string
           `pck' does not contain at least one character, since the input
           string cannot be converted to a Fortran-style string in this
           case.

       7)  The error SPICE(NULLPOINTER) is signaled if the input string
           pointer `pck' is null.

#### Files

       None.

#### Particulars

       This routine provides an API via which applications can determine
       the set of reference frames for which there are data in a
       specified PCK file.

#### Examples

       1)  Display the coverage for each frame in a specified PCK file.
           Find the set of frames in the file.  Loop over the contents
           of the ID code set:  find the coverage for each item in the
           set and display the coverage.

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

              int main()
              {
                 /.
                 Local parameters
                 ./
                 #define  FILSIZ         256
                 #define  MAXIV          1000
                 #define  WINSIZ         ( 2 * MAXIV )
                 #define  TIMLEN         51
                 #define  MAXOBJ         1000

                 /.
                 Local variables
                 ./
                 SPICEDOUBLE_CELL        ( cover, WINSIZ );
                 SPICEINT_CELL           ( ids,   MAXOBJ );

                 SpiceChar               lsk     [ FILSIZ ];
                 SpiceChar               pck     [ FILSIZ ];
                 SpiceChar               timstr  [ TIMLEN ];

                 SpiceDouble             b;
                 SpiceDouble             e;

                 SpiceInt                i;
                 SpiceInt                j;
                 SpiceInt                niv;
                 SpiceInt                obj;

                 /.
                 Load a leapseconds kernel for output time conversion.
                 PCKCOV itself does not require a leapseconds kernel.
                 ./
                 prompt_c ( "Name of leapseconds kernel > ", FILSIZ, lsk );
                 furnsh_c ( lsk );

                 /.
                 Get name of PCK file.
                 ./
                 prompt_c ( "Name of PCK file           > ", FILSIZ, pck    );

                 /.
                 Find the set of frames in the PCK file.
                 ./
                 pckfrm_c ( pck, &ids );

                 /.
                 We want to display the coverage for each frame. Loop over
                 the contents of the ID code set, find the coverage for
                 each item in the set, and display the coverage.
                 ./
                 for ( i = 0;  i < card_c( &ids );  i++  )
                 {
                    /.
                    Find the coverage window for the current frame.
                    Empty the coverage window each time so we don't
                    include data for the previous frame.
                    ./
                    obj  =  SPICE_CELL_ELEM_I( &ids, i );

                    scard_c  ( 0,        &cover );
                    pckcov_c ( pck, obj, &cover );

                    /.
                    Get the number of intervals in the coverage window.
                    ./
                    niv = wncard_c ( &cover );

                    /.
                    Display a simple banner.
                    ./
                    printf ( "%s\n", "========================================" );

                    printf ( "Coverage for frame %d\n", (int)obj );

                    /.
                    Convert the coverage interval start and stop times to TDB
                    calendar strings.
                    ./
                    for ( j = 0;  j < niv;  j++  )
                    {
                       /.
                       Get the endpoints of the jth interval.
                       ./
                       wnfetd_c ( &cover, j, &b, &e );

                       /.
                       Convert the endpoints to TDB calendar
                       format time strings and display them.
                       ./
                       timout_c ( b,
                                  "YYYY MON DD HR:MN:SC.### (TDB) ::TDB",
                                  TIMLEN,
                                  timstr                                  );

                       printf ( "\n"
                                "Interval:  %d\n"
                                "Start:     %s\n",
                                (int)j,
                                timstr            );

                       timout_c ( e,
                                  "YYYY MON DD HR:MN:SC.### (TDB) ::TDB",
                                  TIMLEN,
                                  timstr                                  );
                       printf ( "Stop:      %s\n", timstr );

                    }

                 }
                 return ( 0 );
              }

#### Restrictions

       1) If an error occurs while this routine is updating the set
          `ids', the set may be corrupted.

#### Literature_References

       None.

#### Author_and_Institution

       N.J. Bachman   (JPL)

#### Version

       -CSPICE Version 1.0.1, 12-JUL-2016 (EDW)

          Edit to example program to use "%d" with explicit casts
          to int for printing SpiceInts with printf.

       -CSPICE Version 1.0.0, 01-DEC-2007 (NJB)

#### Index_Entries

       find frame class id codes of frames in binary pck file

#### Link to routine pckfrm_c source file pckfrm_c.c

    Wed Apr  5 17:54:40 2017