gidx_equals()

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

static

Definition at line 496 of file gserialized_gist_nd.c.

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

Referenced by gserialized_gidx_geom_same(), gserialized_gidx_gidx_same(), gserialized_gist_consistent_leaf(), gserialized_gist_picksplit(), and gserialized_gist_same().

{
        int i;

        POSTGIS_DEBUG(5, "entered function");

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

        if ( gidx_is_unknown(a) && gidx_is_unknown(b) )
                return TRUE;

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

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

        /* For all shared dimensions min(a) == min(b), max(a) == max(b) */
        for (i = 0; i < GIDX_NDIMS(b); i++)
        {
                if ( GIDX_GET_MIN(a,i) != GIDX_GET_MIN(b,i) )
                        return FALSE;
                if ( GIDX_GET_MAX(a,i) != GIDX_GET_MAX(b,i) )
                        return FALSE;
        }
        /* For all unshared dimensions min(a) == 0.0, max(a) == 0.0 */
        for (i = GIDX_NDIMS(b); i < GIDX_NDIMS(a); i++)
        {
                if ( GIDX_GET_MIN(a,i) != 0.0 )
                        return FALSE;
                if ( GIDX_GET_MAX(a,i) != 0.0 )
                        return FALSE;
        }
        return TRUE;
}

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