PostGIS  2.5.0beta2dev-r@@SVN_REVISION@@

◆ lwt_RemoveIsoNode()

int lwt_RemoveIsoNode ( LWT_TOPOLOGY topo,
LWT_ELEMID  node 
)

Remove an isolated node.

For ST_RemoveIsoNode

Parameters
topothe topology to operate on
nodethe identifier of the node to be moved
Returns
0 on success, -1 on error (liblwgeom error handler will be invoked with error message)

Definition at line 3582 of file lwgeom_topo.c.

References _lwt_GetIsoNode(), LWT_TOPOLOGY_T::be_iface, lwerror(), lwfree(), lwt_be_deleteNodesById(), and lwt_be_lastErrorMessage().

3583 {
3584  LWT_ISO_NODE *node;
3585  int n = 1;
3586 
3587  node = _lwt_GetIsoNode( topo, nid );
3588  if ( ! node ) return -1;
3589 
3590  n = lwt_be_deleteNodesById( topo, &nid, n );
3591  if ( n == -1 )
3592  {
3593  lwfree(node);
3594  lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
3595  return -1;
3596  }
3597  if ( n != 1 )
3598  {
3599  lwfree(node);
3600  lwerror("Unexpected error: %d nodes deleted when expecting 1", n);
3601  return -1;
3602  }
3603 
3604  /* TODO: notify to caller about node being removed ?
3605  * See https://trac.osgeo.org/postgis/ticket/3231
3606  */
3607 
3608  lwfree(node);
3609  return 0; /* success */
3610 }
void lwfree(void *mem)
Definition: lwutil.c:244
static int lwt_be_deleteNodesById(const LWT_TOPOLOGY *topo, const LWT_ELEMID *ids, int numelems)
Definition: lwgeom_topo.c:213
const LWT_BE_IFACE * be_iface
static LWT_ISO_NODE * _lwt_GetIsoNode(LWT_TOPOLOGY *topo, LWT_ELEMID nid)
Definition: lwgeom_topo.c:3516
const char * lwt_be_lastErrorMessage(const LWT_BE_IFACE *be)
Definition: lwgeom_topo.c:120
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
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