geom_from_geojson()

Datum geom_from_geojson

(

PG_FUNCTION_ARGS

)

Definition at line 82 of file lwgeom_in_geojson.c.

{
#ifndef HAVE_LIBJSON
        elog(ERROR, "You need JSON-C for ST_GeomFromGeoJSON");
        PG_RETURN_NULL();
#else /* HAVE_LIBJSON  */
 
        GSERIALIZED *geom;
        LWGEOM *lwgeom;
        text *geojson_input;
        char *geojson;
        char *srs = NULL;
        int32_t srid = WGS84_SRID;
 
        /* Get the geojson stream */
        if (PG_ARGISNULL(0))
                PG_RETURN_NULL();
 
        geojson_input = PG_GETARG_TEXT_P(0);
        geojson = text2cstring(geojson_input);
 
        lwgeom = lwgeom_from_geojson(geojson, &srs);
        if (!lwgeom)
        {
                /* Shouldn't get here */
                elog(ERROR, "lwgeom_from_geojson returned NULL");
                PG_RETURN_NULL();
        }
 
        if (srs)
        {
                srid = getSRIDbySRS(fcinfo, srs);
                lwfree(srs);
        }
 
        lwgeom_set_srid(lwgeom, srid);
        geom = geometry_serialize(lwgeom);
        lwgeom_free(lwgeom);
 
        PG_RETURN_POINTER(geom);
#endif
}

References geometry_serialize(), getSRIDbySRS(), lwfree(), lwgeom_free(), lwgeom_from_geojson(), lwgeom_set_srid(), text2cstring(), and WGS84_SRID.

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