PostGIS  2.5.0dev-r@@SVN_REVISION@@
Datum LWGEOM_line_from_mpoint ( PG_FUNCTION_ARGS  )

Definition at line 1346 of file lwgeom_functions_basic.c.

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

1347 {
1348  GSERIALIZED *ingeom, *result;
1349  LWLINE *lwline;
1350  LWMPOINT *mpoint;
1351 
1352  POSTGIS_DEBUG(2, "LWGEOM_line_from_mpoint called");
1353 
1354  /* Get input GSERIALIZED and deserialize it */
1355  ingeom = PG_GETARG_GSERIALIZED_P(0);
1356 
1357  if ( gserialized_get_type(ingeom) != MULTIPOINTTYPE )
1358  {
1359  elog(ERROR, "makeline: input must be a multipoint");
1360  PG_RETURN_NULL(); /* input is not a multipoint */
1361  }
1362 
1363  mpoint = lwgeom_as_lwmpoint(lwgeom_from_gserialized(ingeom));
1364  lwline = lwline_from_lwmpoint(mpoint->srid, mpoint);
1365  if ( ! lwline )
1366  {
1367  PG_FREE_IF_COPY(ingeom, 0);
1368  elog(ERROR, "makeline: lwline_from_lwmpoint returned NULL");
1369  PG_RETURN_NULL();
1370  }
1371 
1372  result = geometry_serialize(lwline_as_lwgeom(lwline));
1373 
1374  PG_FREE_IF_COPY(ingeom, 0);
1375  lwline_free(lwline);
1376 
1377  PG_RETURN_POINTER(result);
1378 }
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:86
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:329
LWLINE * lwline_from_lwmpoint(int srid, const LWMPOINT *mpoint)
Definition: lwline.c:284
GSERIALIZED * geometry_serialize(LWGEOM *lwgeom)
LWMPOINT * lwgeom_as_lwmpoint(const LWGEOM *lwgeom)
Definition: lwgeom.c:232
int32_t srid
Definition: liblwgeom.h:466

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