PostGIS  2.3.8dev-r@@SVN_REVISION@@

◆ ST_MinimumClearanceLine()

Datum ST_MinimumClearanceLine ( PG_FUNCTION_ARGS  )

Definition at line 3678 of file postgis/lwgeom_geos.c.

References GEOS2POSTGIS(), gserialized_get_srid(), HANDLE_GEOS_ERROR, LW_FALSE, lwgeom_geos_error(), POSTGIS2GEOS(), and POSTGIS_GEOS_VERSION.

Referenced by ST_MinimumClearance().

3679 {
3680 #if POSTGIS_GEOS_VERSION < 36
3681  lwpgerror("The GEOS version this PostGIS binary "
3682  "was compiled against (%d) doesn't support "
3683  "'ST_MinimumClearanceLine' function (3.6.0+ required)",
3685  PG_RETURN_NULL();
3686 #else /* POSTGIS_GEOS_VERSION >= 36 */
3687  GSERIALIZED* input;
3688  GSERIALIZED* result;
3689  GEOSGeometry* input_geos;
3690  GEOSGeometry* result_geos;
3691  int srid;
3692 
3693  initGEOS(lwpgnotice, lwgeom_geos_error);
3694 
3695  input = PG_GETARG_GSERIALIZED_P(0);
3696  srid = gserialized_get_srid(input);
3697  input_geos = POSTGIS2GEOS(input);
3698  if (!input_geos) /* exception thrown at construction */
3699  {
3700  HANDLE_GEOS_ERROR("Geometry could not be converted to GEOS");
3701  PG_RETURN_NULL();
3702  }
3703 
3704  result_geos = GEOSMinimumClearanceLine(input_geos);
3705  GEOSGeom_destroy(input_geos);
3706  if (!result_geos)
3707  {
3708  HANDLE_GEOS_ERROR("Error computing minimum clearance");
3709  PG_RETURN_NULL();
3710  }
3711 
3712  GEOSSetSRID(result_geos, srid);
3713  result = GEOS2POSTGIS(result_geos, LW_FALSE);
3714  GEOSGeom_destroy(result_geos);
3715 
3716  PG_FREE_IF_COPY(input, 0);
3717  PG_RETURN_POINTER(result);
3718 #endif
3719 }
#define POSTGIS_GEOS_VERSION
Definition: sqldefines.h:10
void lwgeom_geos_error(const char *fmt,...)
#define LW_FALSE
Definition: liblwgeom.h:76
GEOSGeometry * POSTGIS2GEOS(GSERIALIZED *pglwgeom)
GSERIALIZED * GEOS2POSTGIS(GEOSGeom geom, char want3d)
#define HANDLE_GEOS_ERROR(label)
int32_t gserialized_get_srid(const GSERIALIZED *s)
Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function)...
Definition: g_serialized.c:83
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