PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ LWGEOM_to_BOX()

Datum LWGEOM_to_BOX ( PG_FUNCTION_ARGS  )

Definition at line 1663 of file lwgeom_functions_basic.c.

1664 {
1665  GSERIALIZED *pg_lwgeom = PG_GETARG_GSERIALIZED_P(0);
1666  LWGEOM *lwgeom = lwgeom_from_gserialized(pg_lwgeom);
1667  GBOX gbox;
1668  int result;
1669  BOX *out = NULL;
1670 
1671  /* Zero out flags */
1672  gbox_init(&gbox);
1673 
1674  /* Calculate the GBOX of the geometry */
1675  result = lwgeom_calculate_gbox(lwgeom, &gbox);
1676 
1677  /* Clean up memory */
1678  lwfree(lwgeom);
1679  PG_FREE_IF_COPY(pg_lwgeom, 0);
1680 
1681  /* Null on failure */
1682  if (!result)
1683  PG_RETURN_NULL();
1684 
1685  out = lwalloc(sizeof(BOX));
1686  out->low.x = gbox.xmin;
1687  out->low.y = gbox.ymin;
1688  out->high.x = gbox.xmax;
1689  out->high.y = gbox.ymax;
1690  PG_RETURN_POINTER(out);
1691 }
char result[OUT_DOUBLE_BUFFER_SIZE]
Definition: cu_print.c:267
void gbox_init(GBOX *gbox)
Zero out all the entries in the GBOX.
Definition: gbox.c:40
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
Definition: gserialized.c:239
void lwfree(void *mem)
Definition: lwutil.c:242
int lwgeom_calculate_gbox(const LWGEOM *lwgeom, GBOX *gbox)
Calculate bounding box of a geometry, automatically taking into account whether it is cartesian or ge...
Definition: lwgeom.c:738
void * lwalloc(size_t size)
Definition: lwutil.c:227
double ymax
Definition: liblwgeom.h:371
double xmax
Definition: liblwgeom.h:369
double ymin
Definition: liblwgeom.h:370
double xmin
Definition: liblwgeom.h:368

References gbox_init(), lwalloc(), lwfree(), lwgeom_calculate_gbox(), lwgeom_from_gserialized(), result, GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

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