int lwgeom_is_empty(const LWGEOM *geom) { int result = LW_FALSE; LWDEBUGF(4, "lwgeom_is_empty: got type %s", lwtype_name(geom->type)); switch (geom->type) { case POINTTYPE: return lwpoint_is_empty((LWPOINT*)geom); break; case LINETYPE: return lwline_is_empty((LWLINE*)geom); break; case CIRCSTRINGTYPE: return lwcircstring_is_empty((LWCIRCSTRING*)geom); break; case POLYGONTYPE: return lwpoly_is_empty((LWPOLY*)geom); break; case TRIANGLETYPE: return lwtriangle_is_empty((LWTRIANGLE*)geom); break; case MULTIPOINTTYPE: case MULTILINETYPE: case MULTIPOLYGONTYPE: case COMPOUNDTYPE: case CURVEPOLYTYPE: case MULTICURVETYPE: case MULTISURFACETYPE: case POLYHEDRALSURFACETYPE: case TINTYPE: case COLLECTIONTYPE: return lwcollection_is_empty((LWCOLLECTION *)geom); break; default: lwerror("lwgeom_is_empty: unsupported input geometry type: %s", lwtype_name(geom->type)); break; } return result; }
static LWLINE* lwline_set_effective_area(const LWLINE *iline,int set_area, double trshld) { LWDEBUG(2, "Entered lwline_set_effective_area"); int set_m; if(set_area) set_m=1; else set_m=FLAGS_GET_M(iline->flags); LWLINE *oline = lwline_construct_empty(iline->srid, FLAGS_GET_Z(iline->flags), set_m); /* Skip empty case */ if( lwline_is_empty(iline) ) return lwline_clone(iline); oline = lwline_construct(iline->srid, NULL, ptarray_set_effective_area(iline->points,2,set_area,trshld)); oline->type = iline->type; return oline; }