Hi Ashish,
Sorry it took us so long to respond to this.
> How would I go about obtaining the group name in which a dimension ID was
> defined in, given the dimension id?
>
>
> For example, after a nc_inq_dimids call with include_parents set to
> non-zero:
>
> int nc_inq_dimids(int ncid, int *ndims, int *dimids, int
> include_parents);
>
>
> could I obtain a gid or the group name in which a particular dimid was
> defined in?
I also needed this capability in ncdump, but I implemented it in some
inline code rather than a separate function, see this fragment from
ncdump.c around line 1543:
/* Subtlety: The following code block is needed because
* nc_inq_dimname() currently returns only a simple dimension
* name, without a prefix identifying the group it came from.
* That's OK unless the dimid identifies a dimension in an
* ancestor group that has the same simple name as a
* dimension in the current group (or some intermediate
* group), in which case the simple name is ambiguous. This
* code tests for that case and provides an absolute dimname
* only in the case where a simple name would be
* ambiguous. */
{
int dimid_test; /* to see if dimname is ambiguous */
int locid; /* group id where dimension is defined */
NC_CHECK( nc_inq_dimid(ncid, dim_name, &dimid_test) );
locid = ncid;
while(var.dims[id] != dimid_test) { /* not in locid, try ancestors
*/
int parent_id;
NC_CHECK( nc_inq_grp_parent(locid, &parent_id) );
locid = parent_id;
NC_CHECK( nc_inq_dimid(locid, dim_name, &dimid_test) );
}
/* dimid is in group locid, prefix dimname with group name if
needed */
if(locid != ncid) {
size_t len;
char *locname; /* the group name */
NC_CHECK( nc_inq_grpname_full(locid, &len, NULL) );
locname = emalloc(len + 1);
NC_CHECK( nc_inq_grpname_full(locid, &len, locname) );
print_name (locname);
if(strcmp("/", locname) != 0) { /* not the root group */
printf("/"); /* ensure a trailing slash */
}
free(locname);
}
}
Since you expressed a need for this functionality also, I'm proposing
that we add it as a new API in netCDF version 4.2. You can follow
progress on this here, if you're interested:
https://www.unidata.ucar.edu/jira/browse/NCF-90
--Russ
Russ Rew UCAR Unidata Program
address@hidden http://www.unidata.ucar.edu
Ticket Details
===================
Ticket ID: RJB-398714
Department: Support netCDF
Priority: Normal
Status: Closed
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