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/* Copyright 2003-2018, University Corporation for Atmospheric
* Research. See the COPYRIGHT file for copying and redistribution
* conditions. */
/**
* @file
* @internal This file is part of netcdf-4, a netCDF-like interface
* for HDF5, or a HDF5 backend for netCDF, depending on your point of
* view.
*
* This file handles the nc4 dimension functions.
*
* @author Ed Hartnett
*/
#include "nc4internal.h"
#include "nc4dispatch.h"
/**
* @internal Netcdf-4 files might have more than one unlimited
* dimension, but return the first one anyway.
*
* @note that this code is inconsistent with nc_inq
*
* @param ncid File and group ID.
* @param unlimdimidp Pointer that gets ID of first unlimited
* dimension, or -1.
*
* @return ::NC_NOERR No error.
* @return ::NC_EBADID Bad ncid.
* @author Ed Hartnett
*/
int
NC4_inq_unlimdim(int ncid, int *unlimdimidp)
{
NC_GRP_INFO_T *grp, *g;
NC_FILE_INFO_T *h5;
NC_DIM_INFO_T *dim;
int found = 0;
int retval;
int i;
LOG((2, "%s: called", __func__));
if ((retval = nc4_find_grp_h5(ncid, &grp, &h5)))
return retval;
assert(h5 && grp);
if (unlimdimidp)
{
/* According to netcdf-3 manual, return -1 if there is no unlimited
dimension. */
*unlimdimidp = -1;
for (g = grp; g && !found; g = g->parent)
{
for(i=0;i<ncindexsize(grp->dim);i++)
{
dim = (NC_DIM_INFO_T*)ncindexith(grp->dim,i);
if(dim == NULL) continue;
if (dim->unlimited)
{
*unlimdimidp = dim->hdr.id;
found++;
break;
}
}
}
}
return NC_NOERR;
}
/**
* @internal Given dim name, find its id.
* Fully qualified names are legal
* @param ncid File and group ID.
* @param name Name of the dimension to find.
* @param idp Pointer that gets dimension ID.
*
* @return ::NC_NOERR No error.
* @return ::NC_EBADID Bad ncid.
* @return ::NC_EBADDIM Dimension not found.
* @return ::NC_EINVAL Invalid input. Name must be provided.
* @author Ed Hartnett
*/
int
NC4_inq_dimid(int ncid, const char *name, int *idp)
{
NC *nc = NULL;
NC_GRP_INFO_T *grp = NULL;
NC_GRP_INFO_T *g = NULL;
NC_FILE_INFO_T *h5 = NULL;
NC_DIM_INFO_T *dim = NULL;
char norm_name[NC_MAX_NAME + 1];
int retval = NC_NOERR;;
int found = 0;
LOG((2, "%s: ncid 0x%x name %s", __func__, ncid, name));
/* Check input. */
if (!name)
{retval = NC_EINVAL; goto done;}
/* If the first char is a /, this is a fully-qualified
* name. Otherwise, this had better be a local name (i.e. no / in
* the middle). */
if (name[0] != '/' && strstr(name, "/"))
{retval = NC_EINVAL; goto done;}
/* Find metadata for this file. */
if ((retval = nc4_find_nc_grp_h5(ncid, &nc, &grp, &h5)))
goto done;
assert(h5 && nc && grp);
/* Normalize name. */
if ((retval = nc4_normalize_name(name, norm_name)))
goto done;;
/* If this is a fqn, then walk the sequence of parent groups to the last group
and see if that group has a dimension of the right name */
if(name[0] == '/') { /* FQN */
int rootncid = (grp->nc4_info->root_grp->hdr.id | grp->nc4_info->controller->ext_ncid);
int parent = 0;
char* lastname = strrchr(norm_name,'/'); /* break off the last segment: the type name */
if(lastname == norm_name)
{retval = NC_EINVAL; goto done;}
*lastname++ = '\0'; /* break off the lastsegment */
if((retval = NC4_inq_grp_full_ncid(rootncid,norm_name,&parent)))
goto done;
/* Get parent info */
if((retval=nc4_find_nc4_grp(parent,&grp)))
goto done;
/* See if dim exists in this group */
dim = (NC_DIM_INFO_T*)ncindexlookup(grp->dim,lastname);
if(dim == NULL)
{retval = NC_EBADTYPE; goto done;}
goto done;
}
/* check for a name match in this group and its parents */
found = 0;
for (g = grp; g ; g = g->parent) {
dim = (NC_DIM_INFO_T*)ncindexlookup(g->dim,norm_name);
if(dim != NULL) {found = 1; break;}
}
if(!found)
{retval = NC_EBADDIM; goto done;}
done:
if(retval == NC_NOERR) {
assert(dim != NULL);
if (idp)
*idp = dim->hdr.id;
}
return retval;
}
/**
* @internal Returns an array of unlimited dimension ids.The user can
* get the number of unlimited dimensions by first calling this with
* NULL for the second pointer.
*
* @param ncid File and group ID.
* @param nunlimdimsp Pointer that gets the number of unlimited
* dimensions. Ignored if NULL.
* @param unlimdimidsp Pointer that gets arrray of unlimited dimension
* ID. Ignored if NULL.
*
* @return ::NC_NOERR No error.
* @return ::NC_EBADID Bad ncid.
* @author Ed Hartnett, Dennis Heimbigner
*/
int
NC4_inq_unlimdims(int ncid, int *nunlimdimsp, int *unlimdimidsp)
{
NC_DIM_INFO_T *dim;
NC_GRP_INFO_T *grp;
NC *nc;
NC_FILE_INFO_T *h5;
int num_unlim = 0;
int retval;
int i;
LOG((2, "%s: ncid 0x%x", __func__, ncid));
/* Find info for this file and group, and set pointer to each. */
if ((retval = nc4_find_nc_grp_h5(ncid, &nc, &grp, &h5)))
return retval;
assert(h5 && nc && grp);
/* Get our dim info. */
assert(h5);
{
for(i=0;i<ncindexsize(grp->dim);i++)
{
dim = (NC_DIM_INFO_T*)ncindexith(grp->dim,i);
if(dim == NULL) continue;
if (dim->unlimited)
{
if (unlimdimidsp)
unlimdimidsp[num_unlim] = dim->hdr.id;
num_unlim++;
}
}
}
/* Give the number if the user wants it. */
if (nunlimdimsp)
*nunlimdimsp = num_unlim;
return NC_NOERR;
}
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