PostGIS  2.3.8dev-r@@SVN_REVISION@@

◆ LWGEOM_line_from_mpoint()

Datum LWGEOM_line_from_mpoint ( PG_FUNCTION_ARGS  )

Definition at line 1345 of file lwgeom_functions_basic.c.

References geometry_serialize(), gserialized_get_type(), lwgeom_as_lwmpoint(), lwgeom_from_gserialized(), LWGEOM_makeline_garray(), lwline_as_lwgeom(), lwline_free(), lwline_from_lwmpoint(), MULTIPOINTTYPE, PG_FUNCTION_INFO_V1(), and LWMPOINT::srid.

Referenced by LWGEOM_collect_garray().

1346 {
1347  GSERIALIZED *ingeom, *result;
1348  LWLINE *lwline;
1349  LWMPOINT *mpoint;
1350 
1351  POSTGIS_DEBUG(2, "LWGEOM_line_from_mpoint called");
1352 
1353  /* Get input GSERIALIZED and deserialize it */
1354  ingeom = PG_GETARG_GSERIALIZED_P(0);
1355 
1356  if ( gserialized_get_type(ingeom) != MULTIPOINTTYPE )
1357  {
1358  elog(ERROR, "makeline: input must be a multipoint");
1359  PG_RETURN_NULL(); /* input is not a multipoint */
1360  }
1361 
1362  mpoint = lwgeom_as_lwmpoint(lwgeom_from_gserialized(ingeom));
1363  lwline = lwline_from_lwmpoint(mpoint->srid, mpoint);
1364  if ( ! lwline )
1365  {
1366  PG_FREE_IF_COPY(ingeom, 0);
1367  elog(ERROR, "makeline: lwline_from_lwmpoint returned NULL");
1368  PG_RETURN_NULL();
1369  }
1370 
1371  result = geometry_serialize(lwline_as_lwgeom(lwline));
1372 
1373  PG_FREE_IF_COPY(ingeom, 0);
1374  lwline_free(lwline);
1375 
1376  PG_RETURN_POINTER(result);
1377 }
uint32_t gserialized_get_type(const GSERIALIZED *s)
Extract the geometry type from the serialized form (it hides in the anonymous data area...
Definition: g_serialized.c:69
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
#define MULTIPOINTTYPE
Definition: liblwgeom.h:87
void lwline_free(LWLINE *line)
Definition: lwline.c:76
LWGEOM * lwline_as_lwgeom(const LWLINE *obj)
Definition: lwgeom.c:262
LWLINE * lwline_from_lwmpoint(int srid, const LWMPOINT *mpoint)
Definition: lwline.c:290
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
LWMPOINT * lwgeom_as_lwmpoint(const LWGEOM *lwgeom)
Definition: lwgeom.c:165
int32_t srid
Definition: liblwgeom.h:466
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