PostGIS  2.5.0dev-r@@SVN_REVISION@@
Datum LWGEOM_to_BOX ( PG_FUNCTION_ARGS  )

Definition at line 1664 of file lwgeom_functions_basic.c.

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

1665 {
1666  GSERIALIZED *pg_lwgeom = PG_GETARG_GSERIALIZED_P(0);
1667  LWGEOM *lwgeom = lwgeom_from_gserialized(pg_lwgeom);
1668  GBOX gbox;
1669  int result;
1670  BOX *out = NULL;
1671 
1672  /* Zero out flags */
1673  gbox_init(&gbox);
1674 
1675  /* Calculate the GBOX of the geometry */
1676  result = lwgeom_calculate_gbox(lwgeom, &gbox);
1677 
1678  /* Clean up memory */
1679  lwfree(lwgeom);
1680  PG_FREE_IF_COPY(pg_lwgeom, 0);
1681 
1682  /* Null on failure */
1683  if ( ! result )
1684  PG_RETURN_NULL();
1685 
1686  out = lwalloc(sizeof(BOX));
1687  out->low.x = gbox.xmin;
1688  out->low.y = gbox.ymin;
1689  out->high.x = gbox.xmax;
1690  out->high.y = gbox.ymax;
1691  PG_RETURN_POINTER(out);
1692 }
void lwfree(void *mem)
Definition: lwutil.c:244
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
double xmax
Definition: liblwgeom.h:292
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:739
double ymin
Definition: liblwgeom.h:293
void gbox_init(GBOX *gbox)
Zero out all the entries in the GBOX.
Definition: g_box.c:47
double xmin
Definition: liblwgeom.h:291
double ymax
Definition: liblwgeom.h:294
void * lwalloc(size_t size)
Definition: lwutil.c:229

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