/*-------------------------------------------------------------------------
* Function: H5G_traverse_link_cb
*
* Purpose: Callback for link traversal. This routine sets the
* correct information for the object location.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Tuesday, September 13, 2005
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_traverse_link_cb(H5G_loc_t UNUSED *grp_loc, const char UNUSED *name, const H5O_link_t UNUSED *lnk,
H5G_loc_t *obj_loc, void *_udata/*in,out*/, H5G_own_loc_t *own_loc/*out*/)
{
H5G_trav_ud1_t *udata = (H5G_trav_ud1_t *)_udata; /* User data passed in */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5G_traverse_link_cb)
/* Check for dangling soft link */
if(obj_loc == NULL)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "component not found")
/* Copy new location information for resolved object */
H5O_loc_copy(udata->obj_loc->oloc, obj_loc->oloc, H5_COPY_DEEP);
done:
/* Indicate that this callback didn't take ownership of the group *
* location for the object */
*own_loc = H5G_OWN_NONE;
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_traverse_link_cb() */
/*-------------------------------------------------------------------------
* Function: H5G_open
*
* Purpose: Opens an existing group. The group should eventually be
* closed by calling H5G_close().
*
* Return: Success: Ptr to a new group.
*
* Failure: NULL
*
* Programmer: Robb Matzke
* Monday, January 5, 1998
*
*-------------------------------------------------------------------------
*/
H5G_t *
H5G_open(const H5G_loc_t *loc, hid_t dxpl_id)
{
H5G_t *grp = NULL; /* Group opened */
H5G_shared_t *shared_fo; /* Shared group object */
H5G_t *ret_value = NULL; /* Return value */
FUNC_ENTER_NOAPI(NULL)
/* Check args */
HDassert(loc);
/* Allocate the group structure */
if(NULL == (grp = H5FL_CALLOC(H5G_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "can't allocate space for group")
/* Shallow copy (take ownership) of the group location object */
if(H5O_loc_copy(&(grp->oloc), loc->oloc, H5_COPY_SHALLOW) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTCOPY, NULL, "can't copy object location")
if(H5G_name_copy(&(grp->path), loc->path, H5_COPY_SHALLOW) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTCOPY, NULL, "can't copy path")
/* Check if group was already open */
if((shared_fo = (H5G_shared_t *)H5FO_opened(grp->oloc.file, grp->oloc.addr)) == NULL) {
/* Clear any errors from H5FO_opened() */
H5E_clear_stack(NULL);
/* Open the group object */
if(H5G_open_oid(grp, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, NULL, "not found")
/* Add group to list of open objects in file */
if(H5FO_insert(grp->oloc.file, grp->oloc.addr, grp->shared, FALSE) < 0) {
grp->shared = H5FL_FREE(H5G_shared_t, grp->shared);
HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, NULL, "can't insert group into list of open objects")
} /* end if */
