PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ geography_covers()

Datum geography_covers ( PG_FUNCTION_ARGS  )

Definition at line 709 of file geography_measurement.c.

710 {
711  LWGEOM *lwgeom1 = NULL;
712  LWGEOM *lwgeom2 = NULL;
713  GSERIALIZED *g1 = NULL;
714  GSERIALIZED *g2 = NULL;
715  int result = LW_FALSE;
716 
717  /* Get our geometry objects loaded into memory. */
718  g1 = PG_GETARG_GSERIALIZED_P(0);
719  g2 = PG_GETARG_GSERIALIZED_P(1);
720  gserialized_error_if_srid_mismatch(g1, g2, __func__);
721 
722  /* Construct our working geometries */
723  lwgeom1 = lwgeom_from_gserialized(g1);
724  lwgeom2 = lwgeom_from_gserialized(g2);
725 
726  /* EMPTY never intersects with another geometry */
727  if ( lwgeom_is_empty(lwgeom1) || lwgeom_is_empty(lwgeom2) )
728  {
729  lwgeom_free(lwgeom1);
730  lwgeom_free(lwgeom2);
731  PG_FREE_IF_COPY(g1, 0);
732  PG_FREE_IF_COPY(g2, 1);
733  PG_RETURN_BOOL(false);
734  }
735 
736  /* Calculate answer */
737  result = lwgeom_covers_lwgeom_sphere(lwgeom1, lwgeom2);
738 
739  /* Clean up */
740  lwgeom_free(lwgeom1);
741  lwgeom_free(lwgeom2);
742  PG_FREE_IF_COPY(g1, 0);
743  PG_FREE_IF_COPY(g2, 1);
744 
745  PG_RETURN_BOOL(result);
746 }
char result[OUT_DOUBLE_BUFFER_SIZE]
Definition: cu_print.c:267
void gserialized_error_if_srid_mismatch(const GSERIALIZED *g1, const GSERIALIZED *g2, const char *funcname)
Definition: gserialized.c:404
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
Definition: gserialized.c:239
#define LW_FALSE
Definition: liblwgeom.h:108
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1138
int lwgeom_covers_lwgeom_sphere(const LWGEOM *lwgeom1, const LWGEOM *lwgeom2)
Calculate covers predicate for two lwgeoms on the sphere.
Definition: lwgeodetic.c:2416
static int lwgeom_is_empty(const LWGEOM *geom)
Return true or false depending on whether a geometry is an "empty" geometry (no vertices members)
Definition: lwinline.h:203

References gserialized_error_if_srid_mismatch(), LW_FALSE, lwgeom_covers_lwgeom_sphere(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_is_empty(), and result.

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