gidx_overlaps()

static bool gidx_overlaps ( GIDX *  a, GIDX *  b  )

static

Definition at line 417 of file gserialized_gist_nd.c.

References FALSE, gidx_dimensionality_check(), gidx_is_unknown(), and TRUE.

Referenced by gserialized_gidx_geog_overlaps(), gserialized_gidx_geom_overlaps(), gserialized_gidx_gidx_overlaps(), gserialized_gist_consistent_internal(), gserialized_gist_consistent_leaf(), and gserialized_overlaps().

{
        int i;
        int ndims_b;
        POSTGIS_DEBUG(5, "entered function");

        if ( (a == NULL) || (b == NULL) ) return FALSE;

        if ( gidx_is_unknown(a) || gidx_is_unknown(b) )
                return FALSE;

        /* Ensure 'a' has the most dimensions. */
        gidx_dimensionality_check(&a, &b);

        ndims_b = GIDX_NDIMS(b);

        /* compare only up to dimensions of (b), missing dimensions always overlap */
        for ( i = 0; i < ndims_b; i++ )
        {
                if ( GIDX_GET_MIN(a,i) > GIDX_GET_MAX(b,i) )
                        return FALSE;
                if ( GIDX_GET_MIN(b,i) > GIDX_GET_MAX(a,i) )
                        return FALSE;
        }

        return TRUE;
}

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