geography_dwithin_cache()

int geography_dwithin_cache	(	FunctionCallInfo	fcinfo,
		const GSERIALIZED *	g1,
		const GSERIALIZED *	g2,
		const SPHEROID *	s,
		double	tolerance,
		int *	dwithin
	)

Definition at line 267 of file geography_measurement_trees.c.

References distance(), FP_TOLERANCE, geography_distance_cache_tolerance(), LW_FAILURE, LW_FALSE, LW_SUCCESS, and LW_TRUE.

Referenced by geography_dwithin().

{
        double distance;
        /* Ticket #2422, difference between sphere and spheroid distance can trip up the */
        /* threshold shortcircuit (stopping a calculation before the spheroid distance is actually */
        /* below the threshold. Lower in the code line, we actually reduce the threshold a little to */
        /* avoid this. */
        /* Correct fix: propogate the spheroid information all the way to the bottom of the calculation */
        /* so the "right thing" can be done in all cases. */
        if ( LW_SUCCESS == geography_distance_cache_tolerance(fcinfo, g1, g2, s, tolerance, &distance) )
        {
                *dwithin = (distance <= (tolerance + FP_TOLERANCE) ? LW_TRUE : LW_FALSE);
                return LW_SUCCESS;
        }
        return LW_FAILURE;
}

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