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/*-------------------------------------------------------------------------
* Copyright (C) 1999 National Center for Supercomputing Applications.
* All rights reserved.
*
*-------------------------------------------------------------------------
*/
#include "hdf5.h"
#include "H5Git.h"
#define FALSE 0
static herr_t count_elems(hid_t loc_id, const char *name, void *opdata);
static herr_t obj_info(hid_t loc_id, const char *name, void *opdata);
typedef struct retval {
char * name;
int type;
} retval_t;
/*-------------------------------------------------------------------------
* Function: H5Gn_members
*
* Purpose: Return the number of members of a group. The "members"
* are the datasets, groups, and named datatypes in the
* group.
*
* This function wraps the H5Ginterate() function in
* a completely obvious way, uses the operator
* function 'count_members()' below;
*
* See also: H5Giterate()
*
* IN: hid_t file: the file id
* IN: char *group_name: the name of the group
*
* Errors:
*
* Return: Success: The object number of members of
* the group.
*
* Failure: FAIL
*
* Programmer: REMcG
* Monday, Aug 2, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
int
H5Gn_members( hid_t loc_id, char *group_name )
{
int res;
int nelems = 0;
res = H5Giterate(loc_id, group_name, NULL, count_elems, (void *)&nelems);
if (res < 0) {
return res;
} else {
return( nelems );
}
}
/*-------------------------------------------------------------------------
* Function: H5Gget_obj_info_idx
*
* Purpose: Return the name and type of the member of the group
* at index 'idx', as defined by the H5Giterator()
* function.
*
* This function wraps the H5Ginterate() function in
* a completely obvious way, uses the operator
* function 'get_objinfo()' below;
*
* See also: H5Giterate()
*
* IN: hid_t file: the file id
* IN: char *group_name: the name of the group
* IN: int idx: the index of the member object (see
* H5Giterate()
* OUT: char **objname: the name of the member object
* OUT: int *type: the type of the object (dataset,
* group, or named datatype)
*
* Errors:
*
* Return: Success: The object number of members of
* the group.
*
* Failure: FAIL
*
* Programmer: REMcG
* Monday, Aug 2, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Gget_obj_info_idx( hid_t loc_id, char *group_name, int idx, char **objname, size_t max_objname_len, int *type )
{
int res;
retval_t retVal;
res = H5Giterate(loc_id, group_name, &idx, obj_info, (void *)&retVal);
if (res < 0) {
return res;
}
/* Only play with the string if it was returned */
if(retVal.name!=NULL) {
/* Copy the name to return & truncate if necessary */
strncpy(*objname,retVal.name,max_objname_len);
(*objname)[max_objname_len]='\0';
/* Free the name we strdup'ed in obj_info() */
free(retVal.name);
} /* end if */
else
*(*objname)='\0';
*type = retVal.type;
return 0;
}
/*-------------------------------------------------------------------------
* Function: count_elems
*
* Purpose: this is the operator function called by H5Gn_members().
*
* This function is passed to H5Ginterate().
*
* See also: H5Giterate()
*
* OUT: 'opdata' is returned as an integer with the
* number of members in the group.
*
* Errors:
*
* Return: Success: The object number of members of
* the group.
*
* Failure: FAIL
*
* Programmer: REMcG
* Monday, Aug 2, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
count_elems(hid_t loc_id, const char *name, void *opdata)
{
herr_t res;
H5G_stat_t statbuf;
res = H5Gget_objinfo(loc_id, name, FALSE, &statbuf);
if (res < 0) {
return 1;
}
switch (statbuf.type) {
case H5G_GROUP:
(*(int *)opdata)++;
break;
case H5G_DATASET:
(*(int *)opdata)++;
break;
case H5G_TYPE:
(*(int *)opdata)++;
break;
default:
(*(int *)opdata)++; /* ???? count links or no? */
break;
}
return 0;
}
/*-------------------------------------------------------------------------
* Function: obj_info
*
* Purpose: this is the operator function called by H5Gn_members().
*
* This function is passed to H5Ginterate().
*
* See also: H5Giterate()
*
* OUT: 'opdata' is returned as a 'recvar_t', containing
* the object name and type.
*
* Errors:
*
* Return: Success: The object number of members of
* the group.
*
* Failure: FAIL
*
* Programmer: REMcG
* Monday, Aug 2, 1999
*
* Modifications:
*
*-------------------------------------------------------------------------
* group, or named datatype)
*/
static herr_t
obj_info(hid_t loc_id, const char *name, void *opdata)
{
herr_t res;
H5G_stat_t statbuf;
res = H5Gget_objinfo(loc_id, name, FALSE, &statbuf);
if (res < 0) {
((retval_t *)opdata)->type = 0;
((retval_t *)opdata)->name = NULL;
return 1;
} else {
((retval_t *)opdata)->type = statbuf.type;
((retval_t *)opdata)->name = strdup(name);
return 1;
}
}
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