gserialized_datum_predicate()

static int gserialized_datum_predicate ( Datum  gs1, Datum  gs2, gidx_predicate  predicate  )

static

Support function.

Based on two datums return true if they satisfy the predicate and false otherwise.

Definition at line 538 of file gserialized_gist_nd.c.

References LW_FALSE, LW_SUCCESS, and LW_TRUE.

Referenced by gserialized_contains(), gserialized_overlaps(), and gserialized_within().

{
        /* Put aside some stack memory and use it for GIDX pointers. */
        char boxmem1[GIDX_MAX_SIZE];
        char boxmem2[GIDX_MAX_SIZE];
        GIDX *gidx1 = (GIDX*)boxmem1;
        GIDX *gidx2 = (GIDX*)boxmem2;

        POSTGIS_DEBUG(3, "entered function");

        /* Must be able to build box for each arguement (ie, not empty geometry)
           and predicate function to return true. */
        if ( (gserialized_datum_get_gidx_p(gs1, gidx1) == LW_SUCCESS) &&
             (gserialized_datum_get_gidx_p(gs2, gidx2) == LW_SUCCESS) &&
              predicate(gidx1, gidx2) )
        {
                POSTGIS_DEBUGF(3, "got boxes %s and %s", gidx_to_string(gidx1), gidx_to_string(gidx2));
                return LW_TRUE;
        }
        return LW_FALSE;
}

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