PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ ST_RemoveRepeatedPoints()

Datum ST_RemoveRepeatedPoints ( PG_FUNCTION_ARGS  )

Definition at line 2793 of file lwgeom_functions_basic.c.

2794 {
2795  GSERIALIZED *g_in = PG_GETARG_GSERIALIZED_P_COPY(0);
2796  uint32_t type = gserialized_get_type(g_in);
2797  GSERIALIZED *g_out;
2798  LWGEOM *lwgeom_in = NULL;
2799  double tolerance = 0.0;
2800  int modified = LW_FALSE;
2801 
2802  /* Don't even start to think about points */
2803  if (type == POINTTYPE)
2804  PG_RETURN_POINTER(g_in);
2805 
2806  if (PG_NARGS() > 1 && !PG_ARGISNULL(1))
2807  tolerance = PG_GETARG_FLOAT8(1);
2808 
2809  lwgeom_in = lwgeom_from_gserialized(g_in);
2810  modified = lwgeom_remove_repeated_points_in_place(lwgeom_in, tolerance);
2811  if (!modified)
2812  {
2813  /* Since there were no changes, we can return the input to avoid the serialization */
2814  PG_RETURN_POINTER(g_in);
2815  }
2816 
2817  g_out = geometry_serialize(lwgeom_in);
2818 
2819  pfree(g_in);
2820  PG_RETURN_POINTER(g_out);
2821 }
LWGEOM * lwgeom_from_gserialized(const GSERIALIZED *g)
Allocate a new LWGEOM from a GSERIALIZED.
Definition: gserialized.c:239
uint32_t gserialized_get_type(const GSERIALIZED *g)
Extract the geometry type from the serialized form (it hides in the anonymous data area,...
Definition: gserialized.c:89
#define LW_FALSE
Definition: liblwgeom.h:108
int lwgeom_remove_repeated_points_in_place(LWGEOM *in, double tolerance)
Definition: lwgeom.c:1554
#define POINTTYPE
LWTYPE numbers, used internally by PostGIS.
Definition: liblwgeom.h:116
type
Definition: ovdump.py:42

References gserialized_get_type(), LW_FALSE, lwgeom_from_gserialized(), lwgeom_remove_repeated_points_in_place(), POINTTYPE, and ovdump::type.

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