PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ ARRAY2GEOS()

GEOSGeometry** ARRAY2GEOS ( ArrayType *  array,
uint32_t  nelems,
int *  is3d,
int *  srid 
)

Definition at line 2916 of file postgis/lwgeom_geos.c.

2917 {
2918  ArrayIterator iterator;
2919  Datum value;
2920  bool isnull;
2921  bool gotsrid = false;
2922  uint32_t i = 0;
2923 
2924  GEOSGeometry** geos_geoms = palloc(nelems * sizeof(GEOSGeometry*));
2925 
2926  iterator = array_create_iterator(array, 0, NULL);
2927 
2928  while(array_iterate(iterator, &value, &isnull))
2929  {
2930  GSERIALIZED *geom = (GSERIALIZED*) DatumGetPointer(value);
2931 
2932  if (isnull)
2933  continue;
2934 
2935  *is3d = *is3d || gserialized_has_z(geom);
2936 
2937  geos_geoms[i] = POSTGIS2GEOS(geom);
2938  if (!geos_geoms[i])
2939  {
2940  uint32_t j;
2941  lwpgerror("Geometry could not be converted to GEOS");
2942 
2943  for (j = 0; j < i; j++) {
2944  GEOSGeom_destroy(geos_geoms[j]);
2945  }
2946  return NULL;
2947  }
2948 
2949  if (!gotsrid)
2950  {
2951  *srid = gserialized_get_srid(geom);
2952  gotsrid = true;
2953  }
2954  else if (*srid != gserialized_get_srid(geom))
2955  {
2956  uint32_t j;
2957  for (j = 0; j <= i; j++) {
2958  GEOSGeom_destroy(geos_geoms[j]);
2959  }
2960  gserialized_error_if_srid_mismatch_reference(geom, *srid, __func__);
2961  return NULL;
2962  }
2963 
2964  i++;
2965  }
2966 
2967  array_free_iterator(iterator);
2968  return geos_geoms;
2969 }
void gserialized_error_if_srid_mismatch_reference(const GSERIALIZED *g1, const int32_t srid2, const char *funcname)
Definition: gserialized.c:419
int32_t gserialized_get_srid(const GSERIALIZED *g)
Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function)...
Definition: gserialized.c:126
int gserialized_has_z(const GSERIALIZED *g)
Check if a GSERIALIZED has a Z ordinate.
Definition: gserialized.c:174
int value
Definition: genraster.py:62
GEOSGeometry * POSTGIS2GEOS(const GSERIALIZED *pglwgeom)

References gserialized_error_if_srid_mismatch_reference(), gserialized_get_srid(), gserialized_has_z(), POSTGIS2GEOS(), and genraster::value.

Referenced by clusterintersecting_garray(), and polygonize_garray().

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