PostGIS  2.2.8dev-r@@SVN_REVISION@@

◆ LWGEOM_from_WKB()

Datum LWGEOM_from_WKB ( PG_FUNCTION_ARGS  )

Definition at line 796 of file lwgeom_ogc.c.

References geometry_serialize(), gserialized_get_srid(), gserialized_set_srid(), LW_PARSER_CHECK_ALL, lwgeom_add_bbox(), LWGEOM_asText(), lwgeom_free(), lwgeom_from_wkb(), lwgeom_needs_bbox(), PG_FUNCTION_INFO_V1(), and SRID_UNKNOWN.

Referenced by LWGEOM_from_text().

797 {
798  bytea *bytea_wkb = (bytea*)PG_GETARG_BYTEA_P(0);
799  int32 srid = 0;
800  GSERIALIZED *geom;
801  LWGEOM *lwgeom;
802  uint8_t *wkb = (uint8_t*)VARDATA(bytea_wkb);
803 
804  lwgeom = lwgeom_from_wkb(wkb, VARSIZE(bytea_wkb)-VARHDRSZ, LW_PARSER_CHECK_ALL);
805 
806  if ( lwgeom_needs_bbox(lwgeom) )
807  lwgeom_add_bbox(lwgeom);
808 
809  geom = geometry_serialize(lwgeom);
810  lwgeom_free(lwgeom);
811  PG_FREE_IF_COPY(bytea_wkb, 0);
812 
813  if ( gserialized_get_srid(geom) != SRID_UNKNOWN )
814  {
815  elog(WARNING, "OGC WKB expected, EWKB provided - use GeometryFromEWKB() for this");
816  }
817 
818  if ( PG_NARGS() > 1 )
819  {
820  srid = PG_GETARG_INT32(1);
821  if ( srid != gserialized_get_srid(geom) )
822  gserialized_set_srid(geom, srid);
823  }
824 
825  PG_RETURN_POINTER(geom);
826 }
unsigned int int32
Definition: shpopen.c:273
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1050
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:86
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:172
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
void lwgeom_add_bbox(LWGEOM *lwgeom)
Compute a bbox if not already computed.
Definition: lwgeom.c:599
#define LW_PARSER_CHECK_ALL
Definition: liblwgeom.h:1870
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:754
int lwgeom_needs_bbox(const LWGEOM *geom)
Check whether or not a lwgeom is big enough to warrant a bounding box.
Definition: lwgeom.c:1103
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:69
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