PostGIS  2.3.7dev-r@@SVN_REVISION@@
Datum LWGEOM_from_WKB ( PG_FUNCTION_ARGS  )

Definition at line 822 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.

823 {
824  bytea *bytea_wkb = (bytea*)PG_GETARG_BYTEA_P(0);
825  int32 srid = 0;
826  GSERIALIZED *geom;
827  LWGEOM *lwgeom;
828  uint8_t *wkb = (uint8_t*)VARDATA(bytea_wkb);
829 
830  lwgeom = lwgeom_from_wkb(wkb, VARSIZE(bytea_wkb)-VARHDRSZ, LW_PARSER_CHECK_ALL);
831 
832  if ( lwgeom_needs_bbox(lwgeom) )
833  lwgeom_add_bbox(lwgeom);
834 
835  geom = geometry_serialize(lwgeom);
836  lwgeom_free(lwgeom);
837  PG_FREE_IF_COPY(bytea_wkb, 0);
838 
839  if ( gserialized_get_srid(geom) != SRID_UNKNOWN )
840  {
841  elog(WARNING, "OGC WKB expected, EWKB provided - use GeometryFromEWKB() for this");
842  }
843 
844  if ( PG_NARGS() > 1 )
845  {
846  srid = PG_GETARG_INT32(1);
847  if ( srid != gserialized_get_srid(geom) )
848  gserialized_set_srid(geom, srid);
849  }
850 
851  PG_RETURN_POINTER(geom);
852 }
unsigned int int32
Definition: shpopen.c:273
void lwgeom_free(LWGEOM *geom)
Definition: lwgeom.c:1063
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:100
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:187
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
void lwgeom_add_bbox(LWGEOM *lwgeom)
Compute a bbox if not already computed.
Definition: lwgeom.c:612
#define LW_PARSER_CHECK_ALL
Definition: liblwgeom.h:1986
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:765
int lwgeom_needs_bbox(const LWGEOM *geom)
Check whether or not a lwgeom is big enough to warrant a bounding box.
Definition: lwgeom.c:1116
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:83

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