PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ LWGEOM_longestline2d()

Datum LWGEOM_longestline2d ( PG_FUNCTION_ARGS  )

Definition at line 666 of file lwgeom_functions_basic.c.

667 {
669  GSERIALIZED *geom1 = PG_GETARG_GSERIALIZED_P(0);
670  GSERIALIZED *geom2 = PG_GETARG_GSERIALIZED_P(1);
671  LWGEOM *theline;
672  LWGEOM *lwgeom1 = lwgeom_from_gserialized(geom1);
673  LWGEOM *lwgeom2 = lwgeom_from_gserialized(geom2);
674  gserialized_error_if_srid_mismatch(geom1, geom2, __func__);
675 
676  theline = lwgeom_furthest_line(lwgeom1, lwgeom2);
677 
678  if (lwgeom_is_empty(theline))
679  PG_RETURN_NULL();
680 
681  result = geometry_serialize(theline);
682  lwgeom_free(theline);
683  lwgeom_free(lwgeom1);
684  lwgeom_free(lwgeom2);
685 
686  PG_FREE_IF_COPY(geom1, 0);
687  PG_FREE_IF_COPY(geom2, 1);
688  PG_RETURN_POINTER(result);
689 }
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
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1138
LWGEOM * lwgeom_furthest_line(const LWGEOM *lw1, const LWGEOM *lw2)
Definition: measures.c:46
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(), lwgeom_free(), lwgeom_from_gserialized(), lwgeom_furthest_line(), lwgeom_is_empty(), and result.

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