PostGIS  2.2.7dev-r@@SVN_REVISION@@
Datum LWGEOM_to_BOX ( PG_FUNCTION_ARGS  )

Definition at line 1627 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.

1628 {
1629  GSERIALIZED *pg_lwgeom = PG_GETARG_GSERIALIZED_P(0);
1630  LWGEOM *lwgeom = lwgeom_from_gserialized(pg_lwgeom);
1631  GBOX gbox;
1632  int result;
1633  BOX *out = NULL;
1634 
1635  /* Zero out flags */
1636  gbox_init(&gbox);
1637 
1638  /* Calculate the GBOX of the geometry */
1639  result = lwgeom_calculate_gbox(lwgeom, &gbox);
1640 
1641  /* Clean up memory */
1642  lwfree(lwgeom);
1643  PG_FREE_IF_COPY(pg_lwgeom, 0);
1644 
1645  /* Null on failure */
1646  if ( ! result )
1647  PG_RETURN_NULL();
1648 
1649  out = lwalloc(sizeof(BOX));
1650  out->low.x = gbox.xmin;
1651  out->low.y = gbox.ymin;
1652  out->high.x = gbox.xmax;
1653  out->high.y = gbox.ymax;
1654  PG_RETURN_POINTER(out);
1655 }
void lwfree(void *mem)
Definition: lwutil.c:214
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
double xmax
Definition: liblwgeom.h:277
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:652
double ymin
Definition: liblwgeom.h:278
void gbox_init(GBOX *gbox)
Zero out all the entries in the GBOX.
Definition: g_box.c:36
double xmin
Definition: liblwgeom.h:276
double ymax
Definition: liblwgeom.h:279
void * lwalloc(size_t size)
Definition: lwutil.c:199

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