PostGIS  2.3.7dev-r@@SVN_REVISION@@
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 3748 of file lwgeom_topo.c.

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

3749 {
3750  LWT_ISO_NODE *node;
3751  int n = 1;
3752 
3753  node = _lwt_GetIsoNode( topo, nid );
3754  if ( ! node ) return -1;
3755 
3756  n = lwt_be_deleteNodesById( topo, &nid, n );
3757  if ( n == -1 )
3758  {
3759  lwfree(node);
3760  lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
3761  return -1;
3762  }
3763  if ( n != 1 )
3764  {
3765  lwfree(node);
3766  lwerror("Unexpected error: %d nodes deleted when expecting 1", n);
3767  return -1;
3768  }
3769 
3770  /* TODO: notify to caller about node being removed ?
3771  * See https://trac.osgeo.org/postgis/ticket/3231
3772  */
3773 
3774  lwfree(node);
3775  return 0; /* success */
3776 }
void lwfree(void *mem)
Definition: lwutil.c:242
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:3682
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:102

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