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

Definition at line 3593 of file postgis/lwgeom_geos.c.

References GEOS2POSTGIS(), gserialized_get_srid(), HANDLE_GEOS_ERROR, LW_FALSE, lwgeom_geos_error(), POSTGIS2GEOS(), and POSTGIS_GEOS_VERSION.

3594 {
3595 #if POSTGIS_GEOS_VERSION < 36
3596  lwpgerror("The GEOS version this PostGIS binary "
3597  "was compiled against (%d) doesn't support "
3598  "'ST_MinimumClearanceLine' function (3.6.0+ required)",
3600  PG_RETURN_NULL();
3601 #else /* POSTGIS_GEOS_VERSION >= 36 */
3602  GSERIALIZED* input;
3603  GSERIALIZED* result;
3604  GEOSGeometry* input_geos;
3605  GEOSGeometry* result_geos;
3606  int srid;
3607 
3608  initGEOS(lwpgnotice, lwgeom_geos_error);
3609 
3610  input = PG_GETARG_GSERIALIZED_P(0);
3611  srid = gserialized_get_srid(input);
3612  input_geos = POSTGIS2GEOS(input);
3613  if (!input_geos)
3614  HANDLE_GEOS_ERROR("Geometry could not be converted to GEOS");
3615 
3616  result_geos = GEOSMinimumClearanceLine(input_geos);
3617  GEOSGeom_destroy(input_geos);
3618  if (!result_geos)
3619  HANDLE_GEOS_ERROR("Error computing minimum clearance");
3620 
3621  GEOSSetSRID(result_geos, srid);
3622  result = GEOS2POSTGIS(result_geos, LW_FALSE);
3623  GEOSGeom_destroy(result_geos);
3624 
3625  PG_FREE_IF_COPY(input, 0);
3626  PG_RETURN_POINTER(result);
3627 #endif
3628 }
#define POSTGIS_GEOS_VERSION
Definition: sqldefines.h:10
void lwgeom_geos_error(const char *fmt,...)
#define LW_FALSE
Definition: liblwgeom.h:76
GEOSGeometry * POSTGIS2GEOS(GSERIALIZED *pglwgeom)
GSERIALIZED * GEOS2POSTGIS(GEOSGeom geom, char want3d)
#define HANDLE_GEOS_ERROR(label)
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:99

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