void gdpool_c ( ConstSpiceChar * name,
SpiceInt * n,
SpiceDouble * values,
SpiceBoolean * found )
Return the d.p. value of a kernel variable from the kernel pool.
VARIABLE I/O DESCRIPTION
-------- --- --------------------------------------------------
name I Name of the variable whose value is to be returned.
start I Which component to start retrieving for name
room I The largest number of values to return.
n O Number of values returned for name.
values O Values associated with name.
found O True if variable is in pool.
name is the name of the variable whose values are to be
returned. If the variable is not in the pool with
numeric type, found will be SPICEFALSE.
start is the index of the first component of name to return.
The index follows the C convention of being 0 based.
If start is less than 0, it will be treated as 0. If
start is greater than the total number of components
available for name, no values will be returned (n will
be set to zero). However, found will still be set to
room is the maximum number of components that should be
returned for this variable. (Usually it is the amount
of room available in the array values). If room is
less than 1 the error SPICE(BADARRAYSIZE) will be
n is the number of values associated with name that
are returned. It will always be less than or equal
If name is not in the pool with numeric type, no value
is given to n.
values is the array of values associated with name.
If name is not in the pool with numeric type, no
values are given to the elements of values.
found is SPICETRUE if the variable is in the pool and has
numeric type, SPICEFALSE if it is not.
1) If the value of room is less than one the error
SPICE(BADARRAYSIZE) is signaled.
2) If the input string pointer is null, the error SPICE(NULLPOINTER)
will be signaled.
3) If the input string has length zero, the error SPICE(EMPTYSTRING)
will be signaled.
This routine provides the user interface to retrieving
numeric data stored in the kernel pool. This interface
allows you to retrieve the data associated with a variable
in multiple accesses. Under some circumstances this alleviates
the problem of having to know in advance the maximum amount
of space needed to accommodate all kernel variables.
However, this method of access does come with a price. It is
always more efficient to retrieve all of the data associated
with a kernel pool data in one call than it is to retrieve
it in sections.
This routine should be used in place of rtpool_c when possible
as it avoids errors associated with writing data past the
end of an array.
See also the entry points gipool_c and gcpool_c.
The following code fragment demonstrates how the data stored
in a kernel pool variable can be retrieved in pieces. Using the
kernel "test.ker" which contains
CTEST_VAL = ('LARRY', 'MOE', 'CURLY' )
ITEST_VAL = ( 3141, 186, 282 )
DTEST_VAL = ( 3.1415, 186.282, .0175 )
#define NUMVALS 2
ldpool_c ( "test.ker" );
/. Is data available by that name. ./
gdpool_c ( "DTEST_VAL", 0, NUMVALS, &n, vals, &found );
/. If so, show me the values. ./
if ( !found )
printf ( "No dp data available for DTEST_VAL.\n" );
for ( i=0; i < NUMVALS; i++ )
gdpool_c ( "DTEST_VAL", i, NUMVALS, &n, vals, &found );
printf ( "%f \n", vals[i] );
Output should be
W.L. Taber (JPL)
E.D. Wright (JPL)
-CSPICE Version 2.1.0 22-JUN-1999 (EDW)
Re-implemented routine without dynamically allocated, temporary
Added local variable to return boolean/logical values. This
fix allows the routine to function if int and long are different
-CSPICE Version 2.0.1 08-FEB-1998 (EDW)
The start parameter is now zero based as per C convention.
-CSPICE Version 1.0.1, 6-JAN-1998 (EDW)
Replaced example routine. Included the data for a test kernel.
-CSPICE Version 1.0.0, 25-OCT-1997 (EDW)
RETURN the d.p. value of a pooled kernel variable
RETURN the numeric value of a pooled kernel variable