PostGIS  2.1.10dev-r@@SVN_REVISION@@
Datum LWGEOM_from_WKB ( PG_FUNCTION_ARGS  )

Definition at line 789 of file lwgeom_ogc.c.

References geometry_serialize(), gserialized_get_srid(), gserialized_set_srid(), LW_PARSER_CHECK_ALL, lwgeom_add_bbox(), lwgeom_free(), lwgeom_from_wkb(), lwgeom_needs_bbox(), and SRID_UNKNOWN.

790 {
791  bytea *bytea_wkb = (bytea*)PG_GETARG_BYTEA_P(0);
792  int32 srid = 0;
793  GSERIALIZED *geom;
794  LWGEOM *lwgeom;
795  uint8_t *wkb = (uint8_t*)VARDATA(bytea_wkb);
796 
797  lwgeom = lwgeom_from_wkb(wkb, VARSIZE(bytea_wkb)-VARHDRSZ, LW_PARSER_CHECK_ALL);
798 
799  if ( lwgeom_needs_bbox(lwgeom) )
800  lwgeom_add_bbox(lwgeom);
801 
802  geom = geometry_serialize(lwgeom);
803  lwgeom_free(lwgeom);
804  PG_FREE_IF_COPY(bytea_wkb, 0);
805 
806  if ( gserialized_get_srid(geom) != SRID_UNKNOWN )
807  {
808  elog(WARNING, "OGC WKB expected, EWKB provided - use GeometryFromEWKB() for this");
809  }
810 
811  if ( PG_NARGS() > 1 )
812  {
813  srid = PG_GETARG_INT32(1);
814  if ( srid != gserialized_get_srid(geom) )
815  gserialized_set_srid(geom, srid);
816  }
817 
818  PG_RETURN_POINTER(geom);
819 }
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1006
void gserialized_set_srid(GSERIALIZED *s, int32_t srid)
Write the SRID into the serialized form (it is packed into three bytes so this is a handy function)...
Definition: g_serialized.c:87
LWGEOM * geom
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:154
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
void lwgeom_add_bbox(LWGEOM *lwgeom)
Compute a bbox if not already computed.
Definition: lwgeom.c:555
#define LW_PARSER_CHECK_ALL
Definition: liblwgeom.h:1707
LWGEOM * lwgeom_from_wkb(const uint8_t *wkb, const size_t wkb_size, const char check)
WKB inputs must have a declared size, to prevent malformed WKB from reading off the end of the memory...
Definition: lwin_wkb.c:728
int lwgeom_needs_bbox(const LWGEOM *geom)
Check whether or not a lwgeom is big enough to warrant a bounding box.
Definition: lwgeom.c:1059
int32_t gserialized_get_srid(const GSERIALIZED *s)
Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function)...
Definition: g_serialized.c:70

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