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/* Copyright 2005-2018, University Corporation for Atmospheric
* Research. See 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 HDF5 groups.
*
* @author Ed Hartnett
*/
#include "config.h"
#include "hdf5internal.h"
/**
* @internal Create a group. Its ncid is returned in the new_ncid
* pointer.
*
* @param parent_ncid Parent group.
* @param name Name of new group.
* @param new_ncid Pointer that gets ncid for new group.
*
* @return ::NC_NOERR No error.
* @return ::NC_EBADID Bad ncid.
* @return ::NC_ESTRICTNC3 Classic model in use for this file.
* @return ::NC_ENOTNC4 Not a netCDF-4 file.
* @author Ed Hartnett
*/
int
NC4_def_grp(int parent_ncid, const char *name, int *new_ncid)
{
NC_GRP_INFO_T *grp, *g;
NC_FILE_INFO_T *h5;
char norm_name[NC_MAX_NAME + 1];
int retval;
LOG((2, "%s: parent_ncid 0x%x name %s", __func__, parent_ncid, name));
/* Find info for this file and group, and set pointer to each. */
if ((retval = nc4_find_grp_h5(parent_ncid, &grp, &h5)))
return retval;
assert(h5);
/* Check and normalize the name. */
if ((retval = nc4_check_name(name, norm_name)))
return retval;
/* Check that this name is not in use as a var, grp, or type. */
if ((retval = nc4_check_dup_name(grp, norm_name)))
return retval;
/* No groups in netcdf-3! */
if (h5->cmode & NC_CLASSIC_MODEL)
return NC_ESTRICTNC3;
/* If it's not in define mode, switch to define mode. */
if (!(h5->flags & NC_INDEF))
if ((retval = NC4_redef(parent_ncid)))
return retval;
/* Update internal lists to reflect new group. The actual HDF5
* group creation will be done when metadata is written by a
* sync. */
if ((retval = nc4_grp_list_add(h5, grp, norm_name, &g)))
return retval;
if (!(g->format_grp_info = calloc(1, sizeof(NC_HDF5_GRP_INFO_T))))
return NC_ENOMEM;
/* For new groups, there are no atts to read from file. */
g->atts_read = 1;
/* Return the ncid to the user. */
if (new_ncid)
*new_ncid = grp->nc4_info->controller->ext_ncid | g->hdr.id;
return NC_NOERR;
}
/**
* @internal Rename a group.
*
* @param grpid Group ID.
* @param name New name for group.
*
* @return ::NC_NOERR No error.
* @return ::NC_EBADID Bad ncid.
* @return ::NC_ENOTNC4 Not a netCDF-4 file.
* @return ::NC_EPERM File opened read-only.
* @return ::NC_EBADGRPID Renaming root forbidden.
* @return ::NC_EHDFERR HDF5 function returned error.
* @return ::NC_ENOMEM Out of memory.
* @author Ed Hartnett
*/
int
NC4_rename_grp(int grpid, const char *name)
{
NC_GRP_INFO_T *grp;
NC_HDF5_GRP_INFO_T *hdf5_grp;
NC_FILE_INFO_T *h5;
char norm_name[NC_MAX_NAME + 1];
int retval;
LOG((2, "nc_rename_grp: grpid 0x%x name %s", grpid, name));
/* Find info for this file and group, and set pointer to each. */
if ((retval = nc4_find_grp_h5(grpid, &grp, &h5)))
return retval;
assert(h5 && grp && grp->format_grp_info);
/* Get HDF5-specific group info. */
hdf5_grp = (NC_HDF5_GRP_INFO_T *)grp->format_grp_info;
if (h5->no_write)
return NC_EPERM; /* attempt to write to a read-only file */
/* Do not allow renaming the root group */
if (grp->parent == NULL)
return NC_EBADGRPID;
/* Check and normalize the name. */
if ((retval = nc4_check_name(name, norm_name)))
return retval;
/* Check that this name is not in use as a var, grp, or type in the
* parent group (i.e. the group that grp is in). */
if ((retval = nc4_check_dup_name(grp->parent, norm_name)))
return retval;
/* If it's not in define mode, switch to define mode. */
if (!(h5->flags & NC_INDEF))
if ((retval = NC4_redef(grpid)))
return retval;
/* Rename the group, if it exists in the file */
if (hdf5_grp->hdf_grpid)
{
NC_HDF5_GRP_INFO_T *parent_hdf5_grp;
parent_hdf5_grp = (NC_HDF5_GRP_INFO_T *)grp->parent->format_grp_info;
/* Close the group */
if (H5Gclose(hdf5_grp->hdf_grpid) < 0)
return NC_EHDFERR;
hdf5_grp->hdf_grpid = 0;
/* Attempt to rename & re-open the group, if the parent group is open */
if (parent_hdf5_grp->hdf_grpid)
{
/* Rename the group. */
if (H5Lmove(parent_hdf5_grp->hdf_grpid, grp->hdr.name,
parent_hdf5_grp->hdf_grpid, name, H5P_DEFAULT,
H5P_DEFAULT) < 0)
return NC_EHDFERR;
/* Reopen the group, with the new name. */
if ((hdf5_grp->hdf_grpid = H5Gopen2(parent_hdf5_grp->hdf_grpid, name,
H5P_DEFAULT)) < 0)
return NC_EHDFERR;
}
}
/* Give the group its new name in metadata. UTF8 normalization
* has been done. */
free(grp->hdr.name);
if (!(grp->hdr.name = strdup(norm_name)))
return NC_ENOMEM;
/* Rebuild index. */
if(!ncindexrebuild(grp->parent->children))
return NC_EINTERNAL;
return NC_NOERR;
}
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