PostGIS  2.2.8dev-r@@SVN_REVISION@@

◆ _lwt_GetEqualEdge()

static LWT_ELEMID _lwt_GetEqualEdge ( LWT_TOPOLOGY topo,
LWLINE edge 
)
static

Definition at line 5327 of file lwgeom_topo.c.

References _lwt_release_edges(), LWT_TOPOLOGY_T::be_iface, LWT_ISO_EDGE::edge_id, LWT_ISO_EDGE::geom, lwerror(), LWGEOM2GEOS(), lwgeom_geos_errmsg, lwgeom_geos_error(), lwgeom_get_bbox(), lwline_as_lwgeom(), lwnotice(), lwt_be_getEdgeWithinBox2D(), lwt_be_lastErrorMessage(), LWT_COL_EDGE_EDGE_ID, and LWT_COL_EDGE_GEOM.

Referenced by _lwt_AddLineEdge().

5328 {
5329  LWT_ELEMID id;
5330  LWT_ISO_EDGE *edges;
5331  int num, i;
5332  const GBOX *qbox = lwgeom_get_bbox( lwline_as_lwgeom(edge) );
5333  GEOSGeometry *edgeg;
5334  const int flds = LWT_COL_EDGE_EDGE_ID|LWT_COL_EDGE_GEOM;
5335 
5336  edges = lwt_be_getEdgeWithinBox2D( topo, qbox, &num, flds, 0 );
5337  if ( num == -1 )
5338  {
5339  lwerror("Backend error: %s", lwt_be_lastErrorMessage(topo->be_iface));
5340  return -1;
5341  }
5342  if ( num )
5343  {
5344  initGEOS(lwnotice, lwgeom_geos_error);
5345 
5346  edgeg = LWGEOM2GEOS( lwline_as_lwgeom(edge), 0 );
5347  if ( ! edgeg )
5348  {
5349  _lwt_release_edges(edges, num);
5350  lwerror("Could not convert edge geometry to GEOS: %s", lwgeom_geos_errmsg);
5351  return -1;
5352  }
5353  for (i=0; i<num; ++i)
5354  {
5355  LWT_ISO_EDGE *e = &(edges[i]);
5356  LWGEOM *g = lwline_as_lwgeom(e->geom);
5357  GEOSGeometry *gg;
5358  int equals;
5359  gg = LWGEOM2GEOS( g, 0 );
5360  if ( ! gg )
5361  {
5362  GEOSGeom_destroy(edgeg);
5363  _lwt_release_edges(edges, num);
5364  lwerror("Could not convert edge geometry to GEOS: %s", lwgeom_geos_errmsg);
5365  return -1;
5366  }
5367  equals = GEOSEquals(gg, edgeg);
5368  GEOSGeom_destroy(gg);
5369  if ( equals == 2 )
5370  {
5371  GEOSGeom_destroy(edgeg);
5372  _lwt_release_edges(edges, num);
5373  lwerror("GEOSEquals exception: %s", lwgeom_geos_errmsg);
5374  return -1;
5375  }
5376  if ( equals )
5377  {
5378  id = e->edge_id;
5379  GEOSGeom_destroy(edgeg);
5380  _lwt_release_edges(edges, num);
5381  return id;
5382  }
5383  }
5384  GEOSGeom_destroy(edgeg);
5385  _lwt_release_edges(edges, num);
5386  }
5387 
5388  return 0;
5389 }
void lwnotice(const char *fmt,...)
Write a notice out to the notice handler.
Definition: lwutil.c:61
char lwgeom_geos_errmsg[LWGEOM_GEOS_ERRMSG_MAXSIZE]
LWLINE * geom
LWGEOM * lwline_as_lwgeom(const LWLINE *obj)
Definition: lwgeom.c:249
void lwgeom_geos_error(const char *fmt,...)
const LWT_BE_IFACE * be_iface
const GBOX * lwgeom_get_bbox(const LWGEOM *lwgeom)
Get a non-empty geometry bounding box, computing and caching it if not already there.
Definition: lwgeom.c:640
LWT_ELEMID edge_id
GEOSGeometry * LWGEOM2GEOS(const LWGEOM *lwgeom, int autofix)
#define LWT_COL_EDGE_EDGE_ID
Edge fields.
static void _lwt_release_edges(LWT_ISO_EDGE *edges, int num_edges)
Definition: lwgeom_topo.c:471
LWT_INT64 LWT_ELEMID
Identifier of topology element.
#define LWT_COL_EDGE_GEOM
static LWT_ISO_EDGE * lwt_be_getEdgeWithinBox2D(const LWT_TOPOLOGY *topo, const GBOX *box, int *numelems, int fields, int limit)
Definition: lwgeom_topo.c:183
const char * lwt_be_lastErrorMessage(const LWT_BE_IFACE *be)
Definition: lwgeom_topo.c:124
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:74
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