Index Page ekcii_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 ekcii_c ( ConstSpiceChar   * table,
                      SpiceInt           cindex,
                      SpiceInt           lenout,
                      SpiceChar        * column,
                      SpiceEKAttDsc    * attdsc  )

#### Abstract

       Return attribute information about a column belonging to a loaded
       EK table, specifying the column by table and index.

#### Required_Reading

       EK

#### Keywords

       EK
       FILES
       UTILITY

#### Brief_I/O

       Variable  I/O  Description
       --------  ---  --------------------------------------------------
       table      I   Name of table containing column.
       cindex     I   Index of column whose attributes are to be found.
       lenout     I   Maximum allowed length of column name.
       column     O   Name of column.
       attdsc     O   Column attribute descriptor.

#### Detailed_Input

       table          is the name of a loaded EK table.  Case is not
                      significant.

       cindex         is the index, within TABLE's column attribute
                      table, of the column whose attributes are to be
                      found.  The indices of the column table entries
                      range from 0 to ccount-1, where ccount is the value
                      returned by the entry point ekccnt_c.

       lenout         is the maximum allowed length of the output column
                      name, including the terminating null.  Column names
                      can be accommodated by a character array of length
                      SPICE_EK_CSTRLN.  This constant is declared in the
                      header file SpiceEK.h.

#### Detailed_Output

       column         is the name of the specified column.

       attdsc         is an EK column attribute descriptor.  See the header
                      file SpiceEK.h for details.

#### Parameters

       None.

#### Exceptions

       1)  If the specified table is not loaded, the error
           SPICE(TABLENOTLOADED) is signaled.

       2)  If the input argument cindex is less than 0 or greater
           than or equal to the number of columns in table, the error
           SPICE(INVALIDINDEX) is signaled.

       3) If the output string pointer is null, the error SPICE(NULLPOINTER)
          is signaled.

       4) If the output string has length less than two characters, it
          is too short to contain one character of output data plus a null
          terminator, so it cannot be passed to the underlying Fortran
          routine.  In this event, the error SPICE(STRINGTOOSHORT) is
          signaled.

       5) If the length of column (indicated by lenout) is at least two
          characters but not large enough to contain the output string,
          the output string will be truncated on the right.

#### Files

       The returned column name and descriptor are based on the currently
       loaded EK files.

#### Particulars

       This routine is a utility that allows a calling routine to
       determine the attributes of the currently loaded columns.

#### Examples

       1)  Dump the names and attributes of the columns in each loaded
           table.  ekcii_c is used to obtain column names and attributes.

              #include "SpiceUsr.h"
              #include "SpiceEK.h"

              #define FILEN           256

              SpiceChar               colnam  [ SPICE_EK_CSTRLN ];
              SpiceChar               ek      [ FILEN ];
              SpiceChar               tabnam  [ SPICE_EK_TSTRLN ];

              SpiceChar             * typstrs [ 4 ] =
                                      {
                                         "CHR", "DP", "INT", "TIME"
                                      };

              SpiceEKAttDsc           attdsc;

              SpiceInt                i;
              SpiceInt                ncols;
              SpiceInt                ntab;
              SpiceInt                tab;

              prompt_c ( "Enter name of EK to examine > ", FILEN, ek );

              furnsh_c ( ek );

              /.
              Get the number of loaded tables.
              ./
              ekntab_c ( &ntab );

              for ( tab = 0;  tab < ntab;  tab++ )
              {
                 /.
                 Get the name of the current table, and look up
                 the column count for this table.
                 ./
                 ektnam_c ( tab, SPICE_EK_TSTRLN, tabnam );

                 ekccnt_c ( tabnam, &ncols );

                 printf ( "Table = %s\n\n", tabnam );

                 /.
                 For each column in the current table, look up the
                 column's attributes.  The attribute block
                 index parameters are defined in the include file
                 ekattdsc.inc.
                 ./

                 for ( i = 0;  i < ncols;  i++ )
                 {
                    ekcii_c ( tabnam, i, SPICE_EK_CSTRLN, colnam, &attdsc );

                    printf ( "Column = %s\n", colnam );

                    /.
                    Write out the current column's data type.
                    ./

                    printf ( "Type = %s\n", typstrs[(int)attdsc.dtype] );

                    if ( attdsc.dtype == SPICE_CHR )
                    {
                       if ( attdsc.strlen == SPICE_EK_VARSIZ )
                       {
                          printf ( "String length = VARIABLE\n" );
                       }
                       else
                       {
                           printf ( "String length = %d\n",
                                   (int) attdsc.strlen );
                       }
                    }

                    /.
                    Write out the current column's entry size.
                    ./
                    printf ( "Size = %d\n", (int)attdsc.size );

                    /.
                    Indicate whether the current column is indexed.
                    ./
                    if ( attdsc.indexd == SPICETRUE )
                    {
                       printf ( "Indexed.\n" );
                    }
                    else
                    {
                       printf ( "Not indexed.\n" );
                    }

                    /.
                    Indicate whether the current column allows
                    null values.
                    ./
                    if ( attdsc.nullok == SPICETRUE )
                    {
                       printf ( "Null values allowed.\n" );
                    }
                    else
                    {
                       printf ( "Null values not allowed.\n" );
                    }
                 }
                 /.
                 We're done with the current column.
                 ./
              }
              /.
              We're done with the current table.
              ./

#### Restrictions

       None.

#### Literature_References

       None.

#### Author_and_Institution

       N.J. Bachman   (JPL)

#### Version

       -CSPICE Version 1.0.2, 12-JUL-2016 (EDW)

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

       -CSPICE Version 1.0.1, 26-MAR-2003 (NJB)

           Fixed description of exception (5):  replaced "lenout-1"
           with "lenout."  Removed spurious word "clock" from string
           description.

       -CSPICE Version 1.0.0, 10-JAN-2002 (NJB)

#### Index_Entries

       return information on loaded EK column specified by index

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

    Wed Apr  5 17:54:33 2017