clamp_srid()

int32_t clamp_srid ( int32_t  srid )

extern

Return a valid SRID from an arbitrary integer Raises a notice if what comes out is different from what went in.

Raises an error if SRID value is out of bounds.

Definition at line 333 of file lwutil.c.

{
        int newsrid = srid;
 
        if ( newsrid <= 0 ) {
                if ( newsrid != SRID_UNKNOWN ) {
                        newsrid = SRID_UNKNOWN;
                        lwnotice("SRID value %d converted to the officially unknown SRID value %d", srid, newsrid);
                }
        } else if ( srid > SRID_MAXIMUM ) {
    newsrid = SRID_USER_MAXIMUM + 1 +
      /* -1 is to reduce likelyhood of clashes */
      /* NOTE: must match implementation in postgis_restore.pl */
      ( srid % ( SRID_MAXIMUM - SRID_USER_MAXIMUM - 1 ) );
                lwnotice("SRID value %d > SRID_MAXIMUM converted to %d", srid, newsrid);
        }
 
        return newsrid;
}

References lwnotice(), SRID_MAXIMUM, SRID_UNKNOWN, and SRID_USER_MAXIMUM.

Referenced by gserialized1_set_srid(), gserialized2_set_srid(), gserialized_typmod_in(), lwgeom_from_wkb_state(), RASTER_asGDALRaster(), RASTER_asRaster(), RASTER_clip(), RASTER_fromGDALRaster(), RASTER_GDALWarp(), RASTER_nearestValue(), RASTER_setPixelValuesGeomval(), rt_raster_from_wkb(), rt_raster_get_srid(), rt_raster_set_srid(), and wkt_lexer_read_srid().

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