_lwt_GetIsoNode()

static LWT_ISO_NODE* _lwt_GetIsoNode ( LWT_TOPOLOGY *  topo, LWT_ELEMID  nid  )

static

Definition at line 3682 of file lwgeom_topo.c.

References LWT_TOPOLOGY_T::be_iface, LWT_ISO_NODE::containing_face, lwerror(), lwfree(), lwt_be_getNodeById(), lwt_be_lastErrorMessage(), and LWT_COL_NODE_CONTAINING_FACE.

Referenced by lwt_MoveIsoNode(), and lwt_RemoveIsoNode().

{
  LWT_ISO_NODE *node;
  int n = 1;

  node = lwt_be_getNodeById( topo, &nid, &n, LWT_COL_NODE_CONTAINING_FACE );
  if ( n < 0 ) {
    lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
    return 0;
  }
  if ( n < 1 ) {
    lwerror("SQL/MM Spatial exception - non-existent node");
    return 0;
  }
  if ( node->containing_face == -1 )
  {
    lwfree(node);
    lwerror("SQL/MM Spatial exception - not isolated node");
    return 0;
  }

  return node;
}

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