BOX2D_construct()

Datum BOX2D_construct

(

PG_FUNCTION_ARGS

)

Definition at line 533 of file lwgeom_box.c.

{
        GSERIALIZED *pgmin = PG_GETARG_GSERIALIZED_P(0);
        GSERIALIZED *pgmax = PG_GETARG_GSERIALIZED_P(1);
        GBOX *result;
        LWPOINT *minpoint, *maxpoint;
        double min, max, tmp;
        gserialized_error_if_srid_mismatch(pgmin, pgmax, __func__);
 
        minpoint = (LWPOINT*)lwgeom_from_gserialized(pgmin);
        maxpoint = (LWPOINT*)lwgeom_from_gserialized(pgmax);
 
        if ( (minpoint->type != POINTTYPE) || (maxpoint->type != POINTTYPE) )
        {
                elog(ERROR, "BOX2D_construct: arguments must be points");
                PG_RETURN_NULL();
        }
 
        if (lwpoint_is_empty(minpoint) || lwpoint_is_empty(maxpoint) ){
                elog(ERROR, "BOX2D_construct: args can not be empty points");
                PG_RETURN_NULL();
        }
 
        result = gbox_new(lwflags(0, 0, 0));
 
        /* Process X min/max */
        min = lwpoint_get_x(minpoint);
        max = lwpoint_get_x(maxpoint);
        if ( min > max )
        {
                tmp = min;
                min = max;
                max = tmp;
        }
        result->xmin = min;
        result->xmax = max;
 
        /* Process Y min/max */
        min = lwpoint_get_y(minpoint);
        max = lwpoint_get_y(maxpoint);
        if ( min > max )
        {
                tmp = min;
                min = max;
                max = tmp;
        }
        result->ymin = min;
        result->ymax = max;
 
        PG_RETURN_POINTER(result);
}

References gbox_new(), gserialized_error_if_srid_mismatch(), lwflags(), lwgeom_from_gserialized(), lwpoint_get_x(), lwpoint_get_y(), lwpoint_is_empty(), POINTTYPE, LWPOINT::type, GBOX::xmax, GBOX::xmin, GBOX::ymax, and GBOX::ymin.

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