Index Page ekucec_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 ekucec_c  ( SpiceInt          handle,
                        SpiceInt          segno,
                        SpiceInt          recno,
                        ConstSpiceChar  * column,
                        SpiceInt          nvals,
                        SpiceInt          vallen,
                        const void      * cvals,
                        SpiceBoolean      isnull )

#### Abstract

       Update a character column entry in a specified EK record.

#### Required_Reading

       EK

#### Keywords

       EK
       FILES
       UTILITY

#### Brief_I/O

       Variable  I/O  Description
       --------  ---  --------------------------------------------------
       handle     I   EK file handle.
       segno      I   Index of segment containing record.
       recno      I   Record to which data is to be updated.
       column     I   Column name.
       nvals      I   Number of values in new column entry.
       vallen     I   Declared length of character values.
       cvals      I   Character values comprising new column entry.
       isnull     I   Flag indicating whether column entry is null.

#### Detailed_Input

       handle         is the handle of an EK file open for write access.

       segno          is the index of the segment containing the column entry
                      to be updated.  EK segment numbers range from
                      0 to N-1, where N is the number of segments
                      in the kernel.

       recno          is the index of the record containing the column entry
                      to be updated.  This record number is relative to the start
                      of the segment indicated by segno; the first
                      record in the segment has index 0.

       column         is the name of the column containing the entry to
                      be updated.

       nvals          is the number of elements in the new value to be inserted
                      into the specified column.

       vallen         is the length of the strings in the cvals array, where
                      the length includes space for null terminators.

                      If the  column has fixed-size entries, then nvals
                      must equal the entry size for the specified column.

       cvals          is the set of replacement values themselves.  The values are
                      written into the specified column and record.

                      The array cvals should be declared with dimensions

                         [nelts][vallen]

                      where nelts is greater than or equal to nvals.

       isnull         is a logical flag indicating whether the entry is
                      null.  If isnull is SPICEFALSE, the column entry
                      defined by nvals and cvals is added to the
                      specified kernel file.

                      If isnull is SPICETRUE, nvals and cvals are ignored:
                      no data are written into the specified column entry.
                      The column entry is marked as a null value.

                      If the column has fixed-length, variable-size
                      entries, the number of entries is considered to
                      be 1.

#### Detailed_Output

       None.  See $Particulars for a description of the effect of this
       routine.

#### Parameters

       None.

#### Exceptions

       1)  If handle is invalid, the error will be diagnosed by routines
           called by this routine.

       2)  If segno is out of range, the error will be diagnosed by
           routines called by this routine.

       3)  If column is not the name of a declared column, the error
           will be diagnosed by routines called by this routine.

       4)  If column specifies a column of whose data type is not
           character, the error SPICE(WRONGDATATYPE) will be
           signaled.

       5)  If recno is out of range, the error will be diagnosed by
           routines called by this routine.

       6)  If the specified column has fixed-size entries and nvals
           does not match this size, the error will be diagnosed by
           routines called by this routine.

       7)  If the specified column has variable-size entries and nvals
           is non-positive, the error will be diagnosed by routines
           called by this routine.

       8)  If an attempt is made to add a null value to a column that
           doesn't take null values, the error will be diagnosed by
           routines called by this routine.

       9)  If column specifies a column of whose class is not
           a character class known to this routine, the error
           SPICE(NOCLASS) will be signaled.

       10) If an I/O error occurs while reading or writing the indicated
           file, the error will be diagnosed by routines called by this
           routine.

       11) If the input string pointer for the column name is null, the error
            SPICE(NULLPOINTER) will be signaled.

       12) If the input string column name has length zero, the error
           SPICE(EMPTYSTRING) will be signaled.

       13) If the string pointer for cvals is null, the error
           SPICE(NULLPOINTER) will be signaled.

       14) If the string length vallen is less than 2, the error
           SPICE(STRINGTOOSHORT) will be signaled.

#### Files

       See the EK Required Reading for a discussion of the EK file
       format.

#### Particulars

       This routine operates by side effects:  it modifies the named
       EK file by replacing a specified character column entry.

#### Examples

       1)  Replace the value in the third record of the column CCOL in
           the fifth segment of an EK file designated by handle.  Set
           the new value to "999".

              #include "SpiceUsr.h"
                 .
                 .
                 .
              ekucec_c ( handle, 4, 2, "CCOL", 1, 4, "999", SPICEFALSE );

        2)  Same as (1), but this time insert a null value.  The argument
           "999" is ignored because the null flag is set to SPICETRUE

              #include "SpiceUsr.h"
                 .
                 .
                 .
              ekucec_c ( handle, 4, 2, "CCOL", 1, 4, "999", SPICETRUE );

       3)  Replace the entry in the third record of the column CARRAY in
           the fifth segment of an EK file designated by handle.  Set
           the new value using an array cbuff of 10 string values.
           We assume cbuff was declared as shown:

              SpiceChar cbuff[10][CBLEN];

              #include "SpiceUsr.h"
                 .
                 .
                 .
              ekucec_c ( handle,  4,      2,      "CARRAY",
                         10,      CBLEN,  cbuff,  SPICEFALSE );

#### Restrictions

       None.

#### Literature_References

       None.

#### Author_and_Institution

       N.J. Bachman   (JPL)

#### Version

       -CSPICE Version 1.0.0, 28-AUG-2001 (NJB)

#### Index_Entries

       replace character entry in an EK column

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

    Wed Apr  5 17:54:34 2017